PRIME MEDICAL SERVICES INC /TX/
10-K, 1999-03-31
MISC HEALTH & ALLIED SERVICES, NEC
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- - --------------------------------------------------------------------------------
                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549


                                    FORM 10-K

              [X] Annual Report Pursuant to Section 13 or 15(d) of
                       the Securities Exchange Act of 1934
                   For the fiscal year ended December 31, 1998

            [ ] Transition Report Pursuant to Section 13 or 15(d) of
                       the Securities Exchange Act of 1934
                         For the transition period from
                                _____ to _____
                                     

                         Commission File Number: 0-22392

                           -------------------------
                          PRIME MEDICAL SERVICES, INC. 
             (Exact name of registrant as specified in its charter)

         DELAWARE                                                74-2652727
(State or other jurisdiction of                               (I.R.S. Employer
 incorporation or organization                               Identification No.)

               1301 Capital of Texas Highway, Austin, Texas 78746
               (Address of principal executive offices) (Zip Code)

                                 (512) 328-2892
              (Registrant's telephone number, including area code)

     Check whether the issuer (1) has filed all reports  required to be filed by
Section 13 or 15(d) of the Securities  Exchange Act of 1934 during the preceding
12 months (or for such shorter  period that the  registrant was required to file
such reports), and (2) has been subject to such filing requirements for the past
90 days. YES X NO
            ---   ---

     Check if there is no disclosure  of  delinquent  filers in response to Item
405 of  Regulation  S-K  contained  in  this  form,  and no  disclosure  will be
contained,  to the best of the  registrant's  knowledge,  in definitive proxy or
information statements incorporated by reference in Part III of the Form 10-K or
any amendment to this Form 10-K. _____

     State the aggregate market value of the voting stock held by non-affiliates
computed by reference  to the price at which the stock was sold,  or the average
bid and asked prices of such stock,  as of a specified date within 60 days prior
to the date of filing.
             Aggregate Market Value at March 30, 1999: $130,334,000

     Indicate the number of shares  outstanding of each of the issuer's  classes
of common equity, as of the latest practicable date.
                                                Number of Shares Outstanding at
        Title of Each Class                              March 30, 1999
        -------------------                              --------------
    Common Stock, $.01 par value                           17,234,267

                       DOCUMENTS INCORPORATED BY REFERENCE
     Selected  portions of the  Registrant's  definitive  proxy material for the
1999 annual meeting of shareholders  are incorporated by reference into Part III
of the Form 10-K.

                                        1
<PAGE>

                          PRIME MEDICAL SERVICES, INC.

                           ANNUAL REPORT ON FORM 10-K

                      FOR THE YEAR ENDED DECEMBER 31, 1998


                                     PART I

ITEM 1.           BUSINESS.
- - -------           ---------

     Prime  Medical  Services,  Inc.,  a Delaware  corporation  ("Prime"  or the
"Company"),  is the  largest  provider  of  lithotripsy  services  in the United
States.  Lithotripsy  is a  non-invasive  procedure  for the treatment of kidney
stones, typically performed on an outpatient basis, that eliminates the need for
lengthy hospital stays and extensive  recovery periods  associated with surgery.
The  Company  has 62  lithotripters  of which 55 are  mobile and seven are fixed
site. The Company's  lithotripters  performed approximately 37,000 procedures in
the United States in 1998 through a network of  approximately  450 hospitals and
surgery  centers in 34 states.  In addition,  the Company has over 270 contracts
with managed care organizations.

     Lithotripters  fragment kidney stones by use of  extracorporeal  shock wave
lithotripsy.  The Company  provides  services  related to the  operation  of the
lithotripters,  including  scheduling,  staffing,  training,  quality assurance,
maintenance,  regulatory  compliance and contracting with payors,  hospitals and
surgery  centers.  Medical  care is rendered  by the  urologists  utilizing  the
lithotripters. Management believes that the Company has collected the industry's
largest  and  most  comprehensive  lithotripsy  database,   containing  detailed
treatment and outcomes data on over 150,000 lithotripsy procedures.  The Company
and its  associated  urologists  utilize this database in seeking to provide the
highest quality of lithotripsy services as efficiently as possible.

     From 1992 through 1998, the Company completed 12 acquisitions  involving 57
lithotripter  operations and internally  developed  five new  operations.  Since
1992,  the Company  has  substantially  divested  its  original  non-lithotripsy
businesses.

     The  Company  has two  reportable  segments,  the  medical  segment,  which
includes  lithotripsy and  prostatherapy  services,  and cardiac  rehabilitation
services,  and manufacturing  segment. See Note O to the consolidated  financial
statements for segment disclosures.

Lithotripsy Industry Overview
- - -----------------------------

     Kidney  stones  develop from  crystals  made up primarily of calcium  which
separate from urine and build up on the inner surfaces of the kidney.  The exact
cause of kidney stone formation is unclear,  and there is no known  preventative
cure in the vast  majority of cases.  Approximately  25% of all kidney stones do
not pass  spontaneously  and therefore  require  medical or surgical  treatment.
Kidney stone treatments used by urologists  include  lithotripsy,  drug therapy,
endoscopic extraction or open surgery. While the nature and location of a kidney
stone impacts the choice of treatment,  the Company believes the majority of all
kidney stones that require treatment are treated with lithotripsy  because it is
non-invasive,  typically  requires no general  anesthesia,  and rarely  requires
hospital stays. After  fragmentation by lithotripsy,  the resulting kidney stone
fragments pass out of the body naturally. Recovery from the procedure is usually
a matter of hours.

     Kidney stone disease is most prevalent in the southern  United States.  Men
are afflicted  with kidney  stones more than twice as frequently as women,  with
the highest incidence occurring in men 45 to 64 years of age.


                                        1
<PAGE>

Kidney Stone Treatment Methods
- - ------------------------------

     A number of kidney stone  treatments  are used by  urologists  ranging from
non-invasive  procedures,  such as drug  therapy  or  lithotripsy,  to  invasive
procedures, such as endoscopic extraction or open surgery. The type of treatment
a  urologist  chooses  depends  on a  number  of  factors,  such as the size and
chemical  make-up of the stone,  the stone's  location in the urinary system and
whether  the  stone is  contributing  to  other  urinary  complications  such as
blockage or infection.

     Certain  types of less common kidney stones may be dissolved by drugs which
allow normal passage from the urinary system. Stones located in certain areas of
the urinary tract may be extracted  endoscopically.  These  procedures  commonly
require  general or local  anesthesia  and can injure the involved  areas of the
urinary  tract.  Frequently,  kidney  stones  are  located  where  they  are not
accessible by an endoscopic procedure.  Prior to the development of lithotripsy,
stones  lodged in the upper  urinary tract were often treated by open surgery or
percutaneous stone removal,  both major operations requiring an incision to gain
access to the stone. After such procedures, the patient typically spends several
days in the hospital  followed by a convalescence  period of three to six weeks.
As the  technology  for treating  kidney stones has  improved,  there has been a
shift from more expensive and  complicated  invasive  procedures to safer,  more
cost efficient and less painful non- invasive procedures, such as lithotripsy.

Extracorporeal Shock Wave Lithotripsy 
- - ------------------------------------- 

     General.  The lithotripter  has  dramatically  changed the course of kidney
stone disease treatment since lithotripsy is normally performed on an outpatient
basis, often without general anesthesia. Recovery times are generally only a few
hours,  and most patients can return to work the next day. There are three basic
types of lithotripsy treatment currently available:  electromagnetic,  spark-gap
and  piezoelectric.  A decision regarding which type is used in any instance may
depend on several factors, among which are the treating physician's preferences,
treatment times, stone location, and anesthesia considerations.  The Company has
41  electromagnetic  machines,  20  spark-gap  machines  and  one  piezoelectric
machine.

     Electromagnetic    Technology.    Most   new   lithotripters   utilize   an
electromagnetic  shock wave  component  that  eliminates the need for disposable
electrodes. The use of lithotripters employing electromagnetic technology allows
for more  precise  focusing  of shock wave  energy and more  predictable  energy
delivery than other  lithotripsy  technologies,  which  eliminates  the need for
anesthesia  in most  cases.  Utilization  of systems  employing  electromagnetic
technology  usually results in  fragmentation  of the kidney stone in between 60
and 90 minutes.

     Spark Gap Technology. With these lithotripsy systems, shock waves generated
by a disposable  high-voltage  spark  electrode  are focused on a kidney  stone.
Utilization  of  systems  employing  spark gap  technology  usually  results  in
fragmentation of the kidney stone in less than 60 minutes.  The use of spark-gap
technology  often  requires  the  administration  of  sedatives  or  intravenous
anesthesia care and in some cases requires general anesthesia.

     Piezoelectric  Technology.  Lithotripters applying piezoelectric technology
focus shock waves on the kidney stone using a linear array of ceramic  elements.
This  technology  has  not  been  widely  adopted,  and  there  are  only  a few
lithotripters utilizing piezoelectric technology operating in the United States.



                                        2
<PAGE>

Other Lines of Business:
- - -----------------------

Medical segment

     In October 1997, the Company began providing thermotherapy services for the
treatment of benign prostatic  hyperplasia  (''BPH'').  BPH is the non-cancerous
enlargement  of  the  prostate,   a  condition   common  in  men  over  age  60.
Thermotherapy uses microwaves to apply heat to the prostate, resulting in relief
of the  symptoms  of BPH without  damaging  surrounding  tissues.  Thermotherapy
relieves the symptoms of BPH without incurring the risks of complications  often
associated with surgery and more invasive  procedures.  The Company operates one
mobile  thermotherapy  device servicing hospitals and surgery centers in eastern
North Carolina,  and a second mobile system in southern California.  The Company
intends to evaluate the success of its  thermotherapy  operations and may expand
such  operations in the future.  The Company  received  approximately  1% of its
revenues from thermotherapy operations in 1998.

     Prime  Cardiac   Rehabilitation   Services,   Inc.  ("Prime  Cardiac"),   a
wholly-owned subsidiary of the Company, provides non-medical management services
for two cardiac rehabilitation centers,  pursuant to agreements with physicians,
clinics and hospitals ("Medical Providers"). The Medical Providers have absolute
authority  over the medical  services  provided at the centers,  fees charged to
patients and the collection practices of the facility.  Prime Cardiac's fees are
generally  based  on  collected  revenues  of  the  centers.   The  Company  has
substantially  reduced its cardiac  rehabilitation  business over the last three
years,  which accounted for less than 1% of the Company's total revenues for the
year ended December 31, 1998.

Manufacturing segment

In September  1997, the Company,  through its acquisition of a 75% interest
in AK Associates,  L.L.C.  ("AK"),  began providing  manufacturing  services and
installation,  upgrade,  refurbishment and repair of major medical equipment for
mobile  medical  services  providers.  The  Company  paid $4.8  million for this
interest, plus an earn-out of $1.1 million, which was paid in February 1999. The
remaining 25% of AK is owned by certain  members of AK  management.  The Company
received  approximately 11% of its revenues from the  manufacturing  segment in
1998.

Potential Liabilities-Insurance
- - -------------------------------

     All medical procedures  performed in connection with the Company's business
activities  are conducted  directly by, or under the  supervision of physicians,
who are not  employees  of the  Company.  The Company  does not provide  medical
services  to any  patients.  However,  patients  being  treated  at health  care
facilities at which the Company provides its non-medical services could suffer a
medical emergency  resulting in serious injury or death, which could subject the
Company to the risk of lawsuits seeking substantial damages.

     The  Company  currently   maintains  general  and  professional   liability
insurance with a total limit of $1,000,000 per loss event and $3,000,000  policy
aggregate  and an umbrella  excess limit of  $10,000,000,  with a deductible  of
$25,000 per occurrence.  In addition, the Company requires medical professionals
who utilize its services to maintain  professional  liability insurance.  All of
these insurance policies are subject to annual renewal by the insurer.  If these
policies  were to be canceled or not  renewed,  or failed to provide  sufficient
coverage  for  the  Company's  liabilities,  the  Company  might  be  forced  to
self-insure against the potential  liabilities referred to above. In that event,
a single  incident  might  result  in an award of  damages  which  might  have a
material adverse effect on the operations of the Company.




                                        3
<PAGE>

Government Regulation and Supervision 
- - ------------------------------------- 

     The  Company  is  subject  to  extensive  regulation  by both  the  federal
government  and the  states in which the  Company  conducts  its  business.  The
Company is subject to Section  1128B of the Social  Security  Act (known as "the
Illegal  Remuneration  Statute"),  which imposes civil and criminal sanctions on
persons  who  solicit,  offer,  receive  or pay any  remuneration,  directly  or
indirectly,  for  referring,  or  arranging  for the  referral of, a patient for
treatment that is paid for in whole or in part by Medicare,  Medicaid or similar
government  programs.  The federal  government  has published  regulations  that
provide  exceptions  or a ''safe  harbor''  for certain  business  transactions.
Transactions  that are  structured  within  the safe  harbors  are deemed not to
violate the Illegal Remuneration  Statute.  Transactions that do not satisfy all
elements  of a relevant  safe  harbor do not  necessarily  violate  the  Illegal
Remuneration  Statute,  but may be subject to greater  scrutiny  by  enforcement
agencies.  The  arrangements  between the Company and the partnerships and other
entities in which it owns an  indirect  interest  and through  which the Company
provides most of its lithotripsy  services (and the  corresponding  arrangements
between such partnerships and other entities and the treating physicians who own
interests  therein  and  who  use  the  lithotripsy  facilities  owned  by  such
partnerships  and other  entities)  could  potentially  be questioned  under the
illegal remuneration prohibition and may not fall within the protection afforded
by these safe harbors. Many states also have laws similar to the Federal Illegal
Remuneration Statute.  While failure to fall within the safe harbors may subject
the Company to scrutiny  under the Illegal  Remuneration  Statute,  such failure
does  not   constitute  a  violation  of  the  Illegal   Remuneration   Statute.
Nevertheless,  these illegal  remuneration  laws,  as applied to activities  and
relationships  similar to those of the Company,  have been  subjected to limited
judicial  and  regulatory  interpretation,  and the Company has not  obtained or
applied  for any  opinion  of any  regulatory  or  judicial  authority  that its
business  operations  and  affiliations  are  in  compliance  with  these  laws.
Therefore,  no  assurances  can be given that the Company's  activities  will be
found to be in compliance with these laws if scrutinized by such authorities.

     In addition to the Illegal Remuneration Statute, Section 1877 of the Social
Security Act ("Stark II") imposes certain restrictions upon referring physicians
and providers of certain designated health services under the Medicare, Medicaid
and Champus Programs  ("Government  Programs").  Subject to certain  exceptions,
Stark II provides that if a physician (or a family member of a physician)  has a
financial relationship with an entity: (I) the physician may not make a referral
to the entity for the  furnishing of  designated  health  services  reimbursable
under the  Government  Programs;  and (ii) the  entity  may not bill  Government
Programs, any individual or any third-party payor for designated health services
furnished pursuant to a prohibited referral under the Government  Programs.  The
prohibitions  of Stark II only  apply to the  treatment  of  Government  Program
patients,  and have no  application  to services  performed  for  non-government
program  patients.  Entities and  physicians  committing  an act in violation of
Stark II will be  required  to refund  amounts  collected  in  violation  of the
statute and also are subject to civil money  penalties  and  exclusion  from the
Government  Programs.  Urologists  are  investors  in 44  of  the  Company's  62
lithotripsy operations,  and the two Company affiliates engaged in thermotherapy
services have  urologist-investors  (the Company  lithotripsy and  thermotherapy
affiliates  with  physician-investors  are  referred  to herein as the  "Company
Physician Entities").

     Many key terms in Stark II are not  adequately  defined  and the statute is
silent  regarding  its  application  to vendors,  such as the Company  Physician
Entities, contracting ''under arrangements'' with hospitals for the provision of
outpatient services.  Prior to the publication of the Proposed Stark Regulations
described below, the Company interpreted Stark II consistently with the informal
view of the General  Counsel for Health and Human  Services,  and concluded that
the statute  did not apply to its method of  conducting  business.  Based upon a
reasonable interpretation of Stark II, by referring

                                        4
<PAGE>

a patient to a hospital  furnishing the outpatient  lithotripsy or thermotherapy
services ''under arrangements'' with the Company Physician Entities, a physician
investor  in a Company  Physician  Entity is not making a referral  to an entity
(the hospital) in which they have an ownership interest.

     On January 9, 1998, the federal government  published proposed  regulations
under  Stark  II (the  "Proposed  Stark  Regulations").  By  clarifying  certain
ambiguities and defining certain statutory terms, the Proposed Stark Regulations
and accompanying  commentary apply the physician referral  prohibitions of Stark
II  to  the  Company  Physician   Entities'  practice  of  contracting   ''under
arrangements''  with  hospitals for treatment and billing of Government  Program
patients.  Only hospitals can bill the Government  Programs for  lithotripsy and
thermotherapy  services;  thus contracting under arrangements with hospitals was
the  way  the  Company  Physician  Entities  economically  participated  in  the
treatment of Government Program patients.  Absent a restructuring of traditional
operations,  to comply  with the  government's  interpretation  of Stark II, the
physician-  investors  will be  prohibited  from  referring  Government  Program
patients to the hospitals  contracting with the Company Physician Entities.  The
Company  cannot  predict when final Stark II  regulations  will be issued or the
substance  of the final  regulations,  but the  interpretive  provisions  of the
Proposed Stark  Regulations  may be viewed as the federal  government's  interim
enforcement   position  until  final   regulations  are  issued.   Restructuring
traditional  operations may reduce  Company  revenues and limit future growth by
(I) reducing or eliminating revenues attributable to the treatment of Government
Program patients by the Company Physician Entities,  (ii) reducing revenues from
the treatment of non-government  patients by Company  Physician  Entities due to
physician,  hospital and third-party  payor anxiety and concern created by Stark
II,  (iii)  requiring  the  Company  Physician  Entities  to  restructure  their
operations  to comply  with  Stark  II,  (iv)  restricting  the  acquisition  or
development of additional lithotripsy or thermotherapy operations that will both
treat Government  Program patients and have referring  physician-investors,  (v)
impairing  the  Company's   relationship  with  urologists  and  (vi)  otherwise
materially adversely impacting the Company.

     Many  states  currently  have  laws  similar  to Stark II that  restrict  a
physician with a financial  relationship with an entity from referring  patients
to that entity.  Often these laws contain statutory exceptions for circumstances
where the referring  physician,  or a member of his practice group, treats their
own patients.  States also commonly  require  physicians to disclose to patients
their financial  relationship with an entity. The Company believes that it is in
material   compliance   with  these  state  laws.   Nevertheless,   these  state
self-referral laws, as applied to activities and relationships  similar to those
of  the  Company,  have  been  subjected  to  limited  judicial  and  regulatory
interpretation,  and the Company has not  obtained or applied for any opinion of
any  regulatory  or  judicial   authority  that  its  business   operations  and
affiliations are in compliance with these laws. Therefore,  no assurances can be
given that the Company's activities will be found to be in compliance with these
laws if scrutinized by such authorities.

     In addition,  upon the  occurrence of changes in the law that may adversely
affect  operations,  the  Company is  required  to  purchase  the  interests  of
physician-investors  for  certain  of  the  Company  Physician  Entities.  These
mandatory purchase  obligations require the payment by the Company of a multiple
of earnings  similar to  multiples  used by the Company in pricing the  original
acquisition of such interests. To the extent the Company is required to purchase
such  interests,  such  purchases  might cause a default  under the terms of the
Company's  senior  credit  facility and senior  subordinated  notes,  impair the
Company's  relationship  with  urologists and otherwise have a material  adverse
impact on the  Company.  Regulatory  developments,  such as Stark II, might also
dictate that the Company purchase all the interests of its  physician-investors,
regardless of any contractual  requirements to do so, or substantially alter its
business  and  operations  to  remain  in  compliance  with   applicable   laws.
Accordingly,  there can be no assurance that the Company will not be required to
change its business

                                        5
<PAGE>

practices or its investment  relationships  with  urologists or that the Company
will not experience a material  adverse effect as a result of any challenge made
by a federal or state regulatory agency. In addition,  there can be no assurance
that  physician-investors  who,  voluntarily  or  otherwise,   divest  of  their
interests in Company  Physician  Entities will continue to refer patients at the
same rate or at all.
 
     Some states require approval,  usually in the form of a certificate of need
("CON"),  prior  to the  purchase  of  major  medical  equipment  exceeding  a
predesignated  capital expenditure  threshold or for the commencement of certain
clinical health services.  Such approval is generally based upon the anticipated
utilization  of the  service  and the  projected  need  for the  service  in the
relevant geographical area of the state where the service is to be provided. CON
laws  differ in many  respects,  and not every  state's  CON law  applies to the
Company.  Most of the  Company's  operations  originated in states which did not
require a CON for  lithotripsy  services,  and the Company has obtained a CON in
states  where  one  is  required.  Some  states  also  require  registration  of
lithotripters  with the state agency  which  administers  its CON program.  Such
registration  is  not  subject  to  any  required  approval,  but  rather  is an
administrative  matter  imposed so that the state will be aware of all  existing
clinical health  services.  The Company  registers in those states which require
these filings.

     All  states in which  the  Company  operates  require  registration  of the
fluoroscopic  x-ray tubes which are utilized to locate the kidney stones treated
with the Company's lithotripters.  The registration  requirements are imposed in
order to facilitate periodic inspection of the fluoroscopic tubes.

     Some  states  have  regulations  that  require  facilities  such as  mobile
lithotripters  to be licensed and to have  appropriate  emergency care resources
and qualified staff meeting the stated educational and experience criteria.  The
Company's lithotripsy equipment is subject to regulation by the U.S. Food & Drug
Administration,  and the motor  vehicles  utilized to  transport  the  Company's
mobile  lithotripsy  equipment  are  subject  to safety  regulation  by the U.S.
Department of  Transportation  and the states in which the Company  conducts its
mobile  lithotripsy  business.  The  Company  believes  that  it is in  material
compliance with these regulations.

     Except as provided herein, the Company believes it complies in all material
respects  with the  foregoing  laws and  regulations,  and all other  applicable
regulatory  requirements;  however, these laws are complex and have been broadly
construed by courts and enforcement  agencies.  Thus,  there can be no assurance
that  the  Company  will  not  be  required  to  change  its  practices  or  its
relationships  with  treating  physicians  who  are  investors  in  the  Company
Physician  Entities,  or that the Company will not experience  material  adverse
effects as a result of any investigations or enforcement actions by a federal or
state regulatory agency.

     A number of proposals for healthcare reform have been made in recent years,
some of which have included radical changes in the healthcare system. Healthcare
reform could result in material  changes in the financing and  regulation of the
healthcare  business,  and the  Company is unable to predict  the effect of such
changes on its future operations. It is uncertain what legislation on healthcare
reform,  if any, will  ultimately be implemented or whether other changes in the
administration or interpretation of governmental healthcare programs will occur.
There can be no assurance that future healthcare legislation or other changes in
the  administration or interpretation of governmental  healthcare  programs will
not have a material adverse effect on the results of operations of the Company.



                                        6

Equipment
- - ---------

     The  Company  purchases  its  lithotripter  equipment  and  maintenance  is
generally  provided pursuant to service contracts with the manufacturer or other
service  companies.  The cost of a new  lithotripter  ranges  from  $400,000  to
$1,000,000.  For mobile lithotripsy,  the Company either purchases or leases the
tractor,  usually for a term up to five years,  and  purchases  the trailer or a
self contained coach.

Employees
- - ---------

     As of March 15, 1999,  the Company  employed  approximately  310  full-time
employees and approximately 38 part-time employees.

Competition
- - -----------

     The  market  to  provide  lithotripsy  services  is highly  fragmented  and
competitive.  The Company  competes  with other private  facilities  and medical
centers  that  offer  lithotripsy  services  and  with  hospitals,  clinics  and
individual medical  practitioners that offer conventional  medical treatment for
kidney stones.  Certain of the Company's current and potential  competitors have
substantially  greater financial resources than the Company and may compete with
the Company for  acquisitions  and development of operations in markets targeted
by the Company. A decrease in the purchase price of lithotripters as a result of
the  development  of less  expensive  lithotripsy  equipment  could decrease the
Company's  competitive  advantage.  Most of the Company's  lithotripsy  services
agreements  have matured past their initial terms and are now in annual  renewal
terms  or  are  on a  month-to-month  basis.  Another  significant  provider  of
lithotripsy services is also a manufacturer of lithotripsy equipment,  which may
create different  incentives for such provider in pricing lithotripsy  services.
Moreover,  while the  Company  believes  that  lithotripsy  has  emerged  as the
superior  treatment  for  kidney  stone  disease,   the  Company  competes  with
alternative kidney stone disease treatments.

ITEM 2.           PROPERTIES.
- - -------           -----------

     The Company's principal executive office is located in Austin,  Texas in an
office building owned by American  Physicians  Service Group, Inc. ("APS").  The
Company pays APS approximately  $8,000 per month,  which includes rental payment
for  approximately  5,600 square feet of office  space,  reception and telephone
services,  and certain  other  services and  facilities.  The office space lease
expires in December 1999.

     The Company  leases  approximately  11,000  square feet of office  space in
Fayetteville,  NC under two leases  expiring in 2001. The current  monthly lease
amount is approximately $10,000.

     The  Company's   manufacturing   subsidiary  owns  a  building   containing
approximately  78,000 square feet of  manufacturing  and office space in Harvey,
Illinois.




ITEM 3.           LEGAL PROCEEDINGS.
- - -------           ------------------

     From  time to time,  the  Company  may be  named  as a party to  litigation
proceedings incidental to its business. The Company does not believe the outcome
of any such litigation is likely to have

                                        7
<PAGE>

a material  adverse  effect on its business,  financial  condition or results of
operations.

ITEM 4.           SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS.
- - -------           ----------------------------------------------------

     NONE.


                                     PART II

ITEM 5. MARKET FOR REGISTRANT'S COMMON STOCK AND RELATED STOCK HOLDER MATTERS.
- - ------------------------------------------------------------------------------

     The  following  table  sets forth the high and low  closing  prices for the
Company's  common  stock  in the  over-the-counter  market  as  reported  by the
National  Association of Securities Dealers,  Inc., Automated Quotations System,
for the years ended December 31, 1998 and 1997 (NASDAQ Symbol "PMSI").

         Year Ended December 31, 1998               High              Low
         ----------------------------               ----              ---

                  First Quarter                    $13.38           $ 9.88
                  Second Quarter                    12.06             8.62
                  Third Quarter                      9.06             7.00
                  Fourth Quarter                     8.00             6.88

         Year Ended December 31, 1997               High              Low
         ----------------------------               ----              ---

                  First Quarter                    $12.38           $ 9.75
                  Second Quarter                    11.81             8.94
                  Third Quarter                     14.75            10.25
                  Fourth Quarter                    14.69            11.75


     On March 15, 1999, the Company had  approximately  700 holders of record of
its common stock.

     The Company has not declared any cash  dividends on its common stock during
the last two years and has no present  intention of declaring any cash dividends
in the  foreseeable  future.  In addition,  the Company is not  permitted by its
current  credit  facility and terms of senior  subordinated  notes to declare or
make any  payments  for  dividends.  It is the  present  policy  of the Board of
Directors to retain all earnings to provide funds for the growth of the Company.
The declaration and payment of dividends in the future will be determined by the
Board of  Directors  based upon the  Company's  earnings,  financial  condition,
capital  requirements,  loan  covenants  and such other  factors as the Board of
Directors may deem relevant.

                                        8

<PAGE>



ITEM 6.  SELECTED FINANCIAL DATA.

($ in thousands, except per share data)


<TABLE>
<S>                           <C>            <C>            <C>            <C>            <C> 

                                             Years Ended December 31,                                       
                              1998           1997           1996           1995           1994
                              ----           ----           ----           ----           ----
 
 
Revenues:

  Lithotripsy                 $ 92,053       $ 93,113       $ 71,602       $ 22,153       $ 14,843

  Other                         12,583          2,866            802          1,042          9,925
 
  Total                       $104,636       $ 95,979       $ 72,404       $ 23,195       $ 24,768
 
Income:

  Net income                  $  10,794      $ 14,856       $  8,961       $  7,204       $  4,504
 

Diluted earnings per share:
  Net income                     $ 0.57        $ 0.76         $ 0.49         $ 0.48         $ 0.31
 

Dividends per share               None          None           None           None            None
 

Total assets                  $241,119       $225,826       $202,534        $ 77,627       $ 53,861
 

Long-term obligations         $100,987       $ 71,198       $ 70,910        $ 22,323       $ 12,734
</TABLE>
 


                                        9
<PAGE>


Quarterly Data
($ in thousands, except share amounts)            
                               3/31       6/30       9/30       12/31
                               ----       ----       ----       -----

1998
Revenues                     $22,795      $25,029    $28,936    $27,876
Net income (loss)            ( 1,168)       3,517      3,941      4,505
Per share amounts (basic):
   Net income (loss)           (0.06)        0.18       0.21       0.25
   Weighted average shares
       outstanding            19,313       19,088     18,437     17,781
Per share amounts (diluted):
   Net income (loss)           (0.06)        0.18       0.21       0.25
   Weighted average shares
      outstanding             19,313       19,223     18,561     17,890

1997
Revenues                     $20,899      $23,220    $26,361    $25,509
Net income                     2,876        3,670      4,520      3,790
Per share amounts (basic):
   Net income                    .15          .19        .23        .20
   Weighted average shares
      outstanding             19,218       19,277     19,299     19,306
Per share amounts (diluted):
   Net income                    .15          .19        .23        .19
   Weighted average shares
      outstanding             19,395       19,435     19,483     19,496
 

ITEM 7.           MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
- - -------           -------------------------------------------------
                  CONDITION AND RESULTS OF OPERATIONS.
                  ------------------------------------

Forward-Looking Statements
- - --------------------------

     The  statements  contained  in this Report on Form 10-K that are not purely
historical are  forward-looking  statements within the meaning of Section 27A of
the  Securities  Act of 1933 and Section 21E of the  Securities  Exchange Act of
1934,  including  statements  regarding  the  Company's   expectations,   hopes,
intentions or strategies  regarding the future.  Readers  should not place undue
reliance on forward-looking  statements. All forward-looking statements included
in this document are based on  information  available to the Company on the date
hereof, and the Company assumes no obligation to update any such forward-looking
statements.  It is important to note that the  Company's  actual  results  could
differ materially from those in such forward-looking  statements. In addition to
any risks and uncertainties specifically identified in the text surrounding such
forward- looking statements,  the reader should consult the Company's reports on
Form 10-Q and other filings under the  Securities Act of 1933 and the Securities
Exchange  Act of 1934,  for factors  that could cause  actual  results to differ
materially from those presented.

     The  forward-looking  statements  included herein are necessarily  based on
various  assumptions  and estimates and are inherently  subject to various risks
and  uncertainties,  including risks and uncertainties  relating to the possible
invalidity of the underlying  assumptions and estimates and possible  changes or
developments  in  social,  economic,   business,  industry,  market,  legal  and
regulatory circumstances and conditions and actions taken or omitted to be taken
by  third  parties,  including  customers,   suppliers,  business  partners  and
competitors and  legislative,  judicial and other  governmental  authorities and
officials.  Assumptions related to the foregoing involve judgements with respect
to, among other things,  future economic,  competitive and market conditions and
future business  decisions,  all of which are difficult or impossible to predict
accurately and many of which are beyond the control of the Company.  Any of such
assumptions  could be inaccurate and  therefore,  there can be no assurance that
the forward-looking statements included in this Report on Form 10-K

                                       10
<PAGE>

will prove to be accurate.

Year ended December 31, 1998 compared to the year ended December 31, 1997
- - -------------------------------------------------------------------------

     Total revenues increased  $8,657,000 (9%) as compared to the same period in
1997.  Revenues  from  lithotripter  operations  decreased  by  $1,060,000  (1%)
primarily due to a decline in average reimbursement per procedure. Manufacturing
revenue  increased by  $8,708,000  (369%) due to the fact that the 1998 revenues
were for the full year while 1997 revenues  were for four months of  operations.
The Company acquired the trailer  manufacturer in September 1997.  Prostatherapy
revenues  rose  $1,207,000  due to the fact that 1998 revenues were for the full
year for one entity and a partial year for another  entity,  while 1997 revenues
included one entity which began operations in the fourth quarter.  Revenues from
cardiac and other  decreased  $198,000  primarily due to four  discontinued/sold
cardiac centers.
 
     Costs and expenses (excluding depreciation and amortization) increased from
35% to 38% of  revenues  and  increased  $6,188,000  (19%)  in  absolute  terms,
compared  to  the  same  period  in  1997.  Cost  of  services  associated  with
lithotripter  operations  decreased  $2,707,000 (10%) in absolute terms and from
27%  to  25%  of  lithotripter  revenues.   Cost  of  services  associated  with
manufacturing  increased  $7,461,000  (428%),  due to full year of operations in
1998 while 1997 costs  represent  four  months of  operations.  Cost of services
associated  with  prostatherapy  increased  $803,000  due  to  a  full  year  of
operations for the first time in 1998. Cost of services  associated with cardiac
centers decreased $229,000 (48%) primarily due to four discontinued/sold cardiac
centers.  Corporate  expenses decreased from 6% to 5% of revenues as the Company
was able to successfully grow without proportionately adding overhead. Corporate
expenses  decreased $757,000 (13%) primarily due to a consolidation of corporate
functions.

     Other deductions  increased $4,635,000 primarily due to (i) the increase of
$4,618,000  for the  writeoff in fees paid to lenders to obtain  financing,  and
(ii) an  increase  in  interest  expense of  $992,000  due to an increase in new
borrowings in March 1998 related to the $100 million senior  subordinated  notes
offering.  The  increased  deductions  were offset  partially  by an increase in
interest income of $677,000.

     Minority interest in consolidated  income decreased  $251,000 primarily due
to  the  decline  in  revenue  discussed  above  in  certain  of  the  Company's
subsidiaries.  Earnings before interest, taxes,  depreciation,  and amortization
(EBITDA)  attributable to minority  interests was $28,077,000 for the year ended
December 31, 1998 compared to $28,591,000 for the same period in 1997. EBITDA is
not intended to represent net income or cash flows from operating  activities in
accordance  with  generally  accepted  accounting  principles  and should not be
considered a measure of the Company's profitability or liquidity.

     Income  tax  expense  for  the  year  ended  December  31,  1998  increased
$1,582,000,  despite the 12% reduction in pretax earnings,  compared to the same
period in 1997 as the 1997  provision  included the effect of a reduction in the
Company's valuation allowance related to net operating loss carryforwards.

Year ended December 31, 1997 compared to the year ended December 31, 1996
- - -------------------------------------------------------------------------

     For the year ended December 31, 1997, total revenues increased  $23,575,000
(33%)  as  compared  to the same  period  in 1996.  Revenues  from  lithotripter
operations  increased by $21,511,000  (30%) primarily due to the acquisitions of
(I) one lithotripter  entity that owned or managed 31  lithotripters  throughout
the U.S. effective May 1996, (ii) additional interests in 10

                                       11
<PAGE>

partnerships  in January  1997,  (iii) one company that owned two  lithotripters
effective June 1997 and (iv) a 38.25% interest in a lithotripter  unit effective
May  1997.   Revenues  from  manufacturing  were  $2,358,000,   related  to  the
acquisition  of the trailer  manufacturer  on September 1, 1997.  Revenues  from
cardiac centers  decreased  $294,000 (37%) primarily due to the one sold cardiac
center.

     For the year  ended  December  31,  1997,  costs  and  expenses  (excluding
depreciation  and  amortization)  increased  from  34% to 35% of  revenues,  and
increased  $8,486,000  (34%) in absolute  terms,  compared to the same period in
1996.  Costs of  services  associated  with  lithotripter  operations  increased
$5,459,000 (27%) in absolute terms primarily due to the  acquisitions  discussed
above,  and decreased from 28% to 27% of  lithotripter  revenues.  Expenses from
manufacturing were $1,743,000.  Cost of services associated with cardiac centers
decreased  $322,000  (51%)  primarily  due to the  sale of one  cardiac  center.
Corporate expenses were 6% of revenues for both years as the Company was able to
successfully grow without  proportionately  adding overhead.  Corporate expenses
increased  $1,438,000 (34%) primarily due to the additional  corporate  expenses
associated with the acquisitions discussed above.

     For the year ended December 31, 1997, other deductions decreased $1,592,000
primarily due to $3,535,000 in debt issuance and canceled  stock  offering costs
in 1996, compared to only $360,000 which were recorded in 1997, partially offset
by an increase in  interest  expense of  $1,500,000  due to  borrowings  in 1997
related to the acquisitions discussed above.

     Minority interest in consolidated income increased $5,498,000 primarily due
to the limited partners'  ownership interest  associated with 21 partnerships in
which Lithotripters,  Inc. holds a controlling  interest.  The Company concluded
the Lithotripters, Inc. acquisition effective May 1, 1996.

     Provision  for income  taxes  increased  $3,799,000  due to the increase in
income before income taxes  partially  offset by the Company fully utilizing its
net  operating  loss and  other  carryforwards  in  1997,  which  resulted  in a
reduction in the beginning of year valuation allowance of $2,399,000.

Liquidity and Capital Resources
- - -------------------------------

     Cash was  $40,146,000  and  $23,770,000  at  December  31,  1998 and  1997,
respectively.  Cash provided by operations  was  $45,551,000  for the year ended
December 31, 1998 and  $51,693,000  for the year ended  December  31, 1997.  The
Company's   subsidiaries  generally  distribute  all  of  their  available  cash
quarterly,  after establishing  reserves for estimated capital  expenditures and
working  capital.  For the years ended December 31, 1998 and 1997, the Company's
subsidiaries  distributed  cash of  approximately  $25,799,000 and  $28,667,000,
respectively, to minority interest holders.

     Cash used by investing  activities for the year ended December 31, 1998 was
$2,142,000  primarily  due to  $5,213,000  for the  purchase  of  equipment  and
leasehold  improvements,  partially offset by $2,532,000 in  distributions  from
investments.  Cash used by investing  activities for the year ended December 31,
1997 was $22,949,000  primarily due to  expenditures  of $20,217,000  associated
with  acquisitions  and  $4,546,000  for the purchase of equipment and leasehold
improvements.  This was partially  offset by $1,690,000  in  distributions  from
investments.
 
     Cash used in financing  activities for the year ended December 31, 1998 was
$27,033,000,

                                       12
<PAGE>

primarily due to distributions to minority interests of $25,799,000, $16,439,000
of purchases of treasury stock and debt issuance costs of $4,417,000,  offset by
net borrowings of  $19,541,000.  Cash used in financing  activities for the year
ended   December  31,  1997  was   $25,070,000,   which  was  primarily  due  to
distributions to minority  interests of $28,667,000  offset by net borrowings of
$873,000 and contributions  received from holders of minority  interests related
to new partnership formations totaling $2,381,000.

     The Company's  existing credit facility is comprised of a revolving line of
credit. The revolving line of credit has a borrowing limit of $100 million, none
of which was drawn at December 31, 1998 and March 15, 1999.

     On March 27,  1998,  the Company  completed  an offering of $100 million of
senior  subordinated  notes due 2008 (the  "Notes") to  qualified  institutional
buyers. The net proceeds from the offering of approximately $96 million was used
to repay all outstanding  indebtedness  under the Company's bank facility,  with
the remainder to be used for general corporate purposes, including acquisitions.
In  connection  therewith,   the  Company  recorded  a  charge  to  earnings  of
approximately  $4.4 million for debt issuance costs  associated  with the Notes.
The Notes bear interest at 8.75% and interest is payable  semi-annually on April
1st and October 1st. Principal is due April 2008.

     The  Company  is  currently  evaluating  its  alternatives  in light of the
Proposed Stark Regulations.  While the Company believes the changing  regulatory
environment  may benefit the Company by  creating  new  lithotripsy  acquisition
opportunities,  the Company is reevaluating  its historical  model for providing
lithotripsy  and  thermotherapy   services  through   operations  which  include
physician-investors.

     The Company  intends to increase the number of its  lithotripsy  operations
primarily through acquisitions.  The Company believes that the fragmented nature
of the lithotripsy  industry,  combined with operational  challenges  created by
increasing regulatory and business complexities, including Stark II, the Illegal
Remuneration   Statute  and  similar  state  laws,   will  provide   significant
lithotripsy acquisition opportunities.  Where appropriate, the Company will seek
to  increase  its  ownership  interest  in  current  lithotripsy  operations  by
purchasing  interests of urologists and other investors who desire to divest due
to  concerns  over  regulatory  issues,  a desire  to  realize a return on their
investment or  retirement.  The Company  intends to fund the purchase  price for
future acquisitions using borrowings under its senior credit facility,  proceeds
from the offering of the Notes and cash flow from operations.  In addition,  the
Company  may  use  shares  of  its  common  stock  in  such  acquisitions  where
appropriate.

     During  1998,  the Company  announced a stock  repurchase  program of up to
$25.0  million of common  stock.  From time to time,  the Company  may  purchase
additional  shares of its common  stock where,  in the  judgment of  management,
market valuations of its stock do not accurately  reflect the Company's past and
projected results of operations.  The Company intends to fund any such purchases
using available cash, cash flow from operations and borrowings  under its senior
credit facility. The Company has purchased 2,120,000 shares of stock for a total
of $18,605,000 as of March 30, 1999.


                                       13
<PAGE>

     The Company's ability to make scheduled payments of principal of, or to pay
the interest on, or to refinance,  its indebtedness,  or to fund planned capital
expenditures will depend on its future performance,  which, to a certain extent,
is subject to general economic, financial, competitive,  legislative, regulatory
and other  factors that are beyond its control.  Based upon the current level of
operations and anticipated cost savings and revenue growth,  management believes
that cash flow from  operations  and available  cash,  together  with  available
borrowings  under its  senior  credit  facility,  will be  adequate  to meet the
Company's future  liquidity needs for at least the next several years.  However,
there can be no assurance that the Company's  business will generate  sufficient
cash flow  from  operations,  that  anticipated  revenue  growth  and  operating
improvements  will be realized or that future borrowings will be available under
the senior  credit  facility  in an amount  sufficient  to enable the Company to
service its indebtedness or to fund its other liquidity needs.


Impact of Inflation
- - -------------------

     The assets of the  Company  are not  significantly  affected  by  inflation
because the Company is not required to make large  investments  in fixed assets.
However,  the rate of inflation will affect  certain of the Company's  expenses,
such as employee compensation and benefits.



Year 2000 Compliance 
- - -------------------- 

     The "Year 2000 " issue refers to the phenomenon  whereby computer programs,
having been written using two digits  rather than four to define the  applicable
year, may  erroneously  recognize a date using "00" as the year 1900 rather than
the year  2000.  This  error  could  potentially  result in a system  failure or
miscalculations  causing  disruptions  of  operations,  including,  among  other
things,  a  temporary  inability  to process  transactions  or engage in similar
normal business activities.

     The Company  formed a Year 2000  Committee in mid 1998.  The  Committee was
charged with examining (1) internal hardware and software  systems;  (2) medical
equipment (3) physical facilities;

                                       14
<PAGE>

and (4) outside  suppliers,  as these items  relate to potential  problems  that
could be caused by the inability to process dates beyond December 31, 1999.

     The Committee  divided its task into four parts -  assessment,  remediation
planning,  implementation and testing and contingency  planning.  Assessment and
remediation  planning have been  substantially  completed for all four phases of
the project.  Implementation and testing and contingency  planning are discussed
below.

     Internal  hardware  and  software   systems:   The  Company  has  completed
substantially  all of the needed upgrades to its hardware and software  systems.
The  remaining  hardware and software  upgrades/replacements  are expected to be
complete by June 30, 1999.

     Medical Equipment:  A review of the Company's  lithotripters has determined
that their  operation  is not  affected  directly  by the Year 2000  issue.  The
Company is currently reviewing the miscellaneous  ancillary medical equipment to
determine compliance and expects to be completed by September 30, 1999.

     Physical facilities: The Committee has evaluated its non-computer equipment
and has determined that, except for its telephone  system,  there are no devices
whose failure would  materially  affect the ability to carry out the business of
the Company.  A compliant  telephone  system is expected to be installed by June
30, 1999. The outside  managers of the Company's  office buildings have reported
that all aspects of the  physical  facilities  -  elevators,  fire and  security
systems,  etc. are compliant.  Their further inquiry of those  supplying  public
utilities  have  produced  assurances  of  best  efforts  but  no  guarantee  of
performance.

     Outside  suppliers:  The Company is currently  inquiring about the state of
Year  2000  readiness  of those  outside  suppliers  who were  determined  to be
critical  to the  Company's  ability to carry out its  business.  This survey is
expected to be complete by June 30, 1999.

     Contingency planning:  The Company cannot be certain that it has identified
and will be successful in bringing into  compliance  all Year 2000 issues within
its control.  It can be even less certain of critical services being supplied by
third parties  beyond its control.  Upon  completion of the  implementation  and
testing phases of the plan, the Company will formalize plans for carrying on its
business in the event of unanticipated  Year 2000-related  failures.  Presently,
the Company  believes that the most reasonably  likely worst case scenario would
be a failure of relatively  short duration of basic third party services such as
the power grid.  With such a failure  the  Company's  planning  will be directed
toward a temporary suspension of operations followed by plans for resumption and
catch up operations.  Due to the magnitude of the uncertainties  related to Year
2000 issues, the Company is unable to fully assess the consequences of Year 2000
failures  and,  consequently,  there could be a material  adverse  effect on the
Company's results of operations, financial position and cash flows.

     To date, the Company has not experienced  significant costs associated with
the Year 2000  issue and does not expect  significant  costs to be  incurred  in
order to correct  the Year 2000  issue.  The  Company is  reviewing  its current
billing and  collecting  software to  determine  if the Company  will replace it
prior to the Year 2000. If the system is replaced,  it is considered part of the
ongoing operations of the Company and not related to the Year 2000 issue.

                                    15
<PAGE>

ITEM 7.A          QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK.
- - --------          -----------------------------------------------------------

Interest Rate Risk:
     The  Company  has  long-term  debt  (including  current  portion)  totaling
$101,877,000,  of which $100  million  has a fixed rate of interest of 8.75% and
$162,000 does not bear any interest.  The remaining $1,715,000 bears interest at
the prime rate.  The Company is exposed to some market risk due to the  floating
interest rate on the $1,715,000. The Company makes monthly or quarterly payments
of principal  and  interest on the  $1,715,000.  A 1.50% rise in interest  rates
would result in a $26,000 annual  increase in interest  expense on this existing
principal balance.




ITEM 8.           FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA.
- - -------           --------------------------------------------

     The  information  required by this item is contained in Appendix A attached
hereto.

ITEM 9.           CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON
- - -------           -------------------------------------------------
                  ACCOUNTING AND FINANCIAL DISCLOSURE.
                  ------------------------------------

     NONE.


                                    PART III

ITEM 10.          DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT.
- - --------          ---------------------------------------------------

     The information  required by this item is contained in the definitive proxy
material of the Company to be filed in connection  with its 1999 annual  meeting
of shareholders,  except for the information regarding executive officers of the
Company which is provided below. The information required by this item contained
in such definitive proxy material is incorporated herein by reference.

                      EXECUTIVE OFFICERS OF THE REGISTRANT.

     As of March 15, 1999, the executive officers of the Company are as follows:

     Name                         Age              Position

Kenneth S. Shifrin                49          Chairman of the Board

Joseph Jenkins, M.D., J.D.        51          President, Chief Executive Officer
                                                   and Director

Stan Johnson                      45          Vice President

Cheryl L. Williams                47          Chief Financial Officer, Vice
                                              President-Finance, and  Secretary
                                       16
<PAGE>


     The   foregoing   does  not  include   positions   held  in  the  Company's
subsidiaries.  Officers  are  elected  for annual  periods.  There are no family
relationships  between any of the  executive  officers  and/or  directors of the
Company.

     Mr.  Shifrin  has been  Chairman of the Board and a director of the Company
since October 1989. In addition,  Mr.  Shifrin has served in various  capacities
with APS since February  1985, and is currently  Chairman of the Board and Chief
Executive  Officer  of APS.  Mr.  Shifrin  is a member of the Young  Presidents'
Organization.

     Dr. Jenkins has been President and Chief  Executive  Officer and a director
of the Company since April 1996.  From May 1990 until December 1991, Dr. Jenkins
was a Vice President of Lithotripters,  Inc. Since January 1992, Dr. Jenkins has
been President of Lithotripters, Inc. Dr. Jenkins is a board certified urologist
and is a founding  member,  a past  president  and  currently  a director of the
American Lithotripsy Society.

     Mr.  Johnson has been a Vice  President of the Company and President of Sun
Medical Technologies,  Inc. ("Sun"), a wholly-owned subsidiary of the Company,
since November 1995.  Mr.  Johnson was the Chief  Financial  Officer of Sun from
1990 to 1995.

     Ms. Williams has been Chief Financial Officer,  Vice  President-Finance and
Secretary of the Company  since  October 1989.  Ms.  Williams was  Controller of
Fairchild  Aircraft  Corporation  from August 1988 to October 1989. From 1985 to
1988, Ms. Williams served as the Chief Financial Officer of APS Systems, Inc., a
wholly-owned subsidiary of APS.



ITEM 11.        EXECUTIVE COMPENSATION.
- - --------        -----------------------

     The information  required by this item is contained in the definitive proxy
statement of the Company to be filed in connection  with its 1999 annual meeting
of shareholders, which information is incorporated herein by reference.

ITEM 12.        SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT.
- - --------        ---------------------------------------------------------------
                 

     The information  required by this item is contained in the definitive proxy
statement of the Company to be filed in connection  with its 1999 annual meeting
of shareholders, which information is incorporated herein by reference.

ITEM 13.          CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS.
- - --------          -----------------------------------------------

     The information  required by this item is contained in the definitive proxy
statement of the Company to be filed in connection  with its 1999 annual meeting
of shareholders, which information is incorporated herein by reference.



                                       17
<PAGE>

                                     PART IV

ITEM 14.      EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS ON FORM 8-K.
- - --------      -----------------------------------------------------------------

(a)  1.  Financial Statements.

     The  information  required by this item is contained in Appendix A attached
hereto.


     2.  Financial Statement Schedules.

         None.

     
(b)  Reports on Form 8-K.

         None.

(c)  Exhibits. (1)

     3.1              Certificate of Incorporation of the Company. (2)

     3.2              Bylaws of the Company. (2)

     4.1              Specimen of Common Stock Certificate. (2)

     10.1*            Prime Medical Services, Inc. 1993 Stock Option Plan. (3)

     10.2*            First Amendment to the Prime Medical Services, Inc. 
                      1993 Stock Option Plan. (12)

     10.3*            Second Amendment to the Prime Medical Services, Inc. 
                      1993 Stock Option Plan. (12)

     10.4*            Third Amendment to the Prime Medical Services, Inc. 
                      1993 Stock Option Plan. (13)

     10.5             Rights Agreement dated October 18, 1993 between the 
                      Company and American Stock Transfer and Trust Company. (3)

     10.6             Form of Indemnification Agreement dated October 11, 1993 
                      between the Company and certain of its officers and 
                      directors. (3)

     10.7             Partnership Agreement of Metro Atlanta Stonebusters, G.P.
                      (5)

     10.8             Management Agreement dated July 28, 1994 between the 
                      Alabama Renal Stone Institute, Inc. and Alabama Kidney 
                      Stone Foundation, Inc. (6)

                                       18
<PAGE>

     10.9             Asset Purchase Agreement, dated August 30, 1994, between 
                      Prime Lithotripter Operations, Inc. and Alabama 
                      Lithotripsy Joint Venture. (7)

     10.10            Asset Purchase Agreement, dated August 30, 1994, between 
                      Prime Lithotripter Operations, Inc. and Baptist Medical 
                      Center - Montclair. (7)

     10.11            Promissory Note, dated August 30, 1994, issued by Prime 
                      Lithotripter Operations, Inc. to Baptist Medical Center - 
                      Montclair.  (7)

     10.12            Management Agreement, dated August 30, 1994, between Prime
                      Lithotripter Operations, Inc. and Alabama Lithotripsy 
                      Associates, Inc.  (7)

     10.13            Security Agreement dated August 30, 1994, between Prime 
                      Lithotripter Operations, Inc. and Baptist Medical Center -
                      Montclair.  (7)

     10.14            Amended and Restated Joint Venture Agreement dated April
                      1989, betweenPrime Diagnostic Imaging Services, Inc. and 
                      The Shasta Diagnostic Imaging Medical Group. (4)

     10.15            Not used

     10.16            Not used

     10.17            Not used

     10.18            Not used

     10.19            Third Amended and Restated Loan Agreement dated April 20, 
                      1998 between Prime Medical Services, Inc., Bank Boston, 
                      N.A., NationsBank of Texas,N.A., and Nationsbanc 
                      Montgomery Securities LLC, as agent. (13)

     10.20            Revolving Credit Note, dated April 20, 1998 in the amount
                      of $20,000,000.00 issued by the Company to NationsBank of 
                      Texas, N.A., as agent. (13)

     10.21            Revolving Credit Note, dated April 20, 1998 in the amount 
                      of $20,000,000.00 issued by the Company to The First 
                      National Bank of Boston, as agent. (13)
 
     10.22            Revolving Credit Note, dated April 20, 1998 in the amount
                      of $10,000,000.00 issued by the Company to Bank One, 
                      Texas, N.A., as agent. (13)

     10.23            Revolving Credit Note, dated April 20, 1998 in the amount
                      of $10,000,000.00 issued by the Company to Imperial Bank, 
                      as agent. (13)

     10.24            Revolving Credit Note, dated April 20, 1998 in the amount
                      of $10,000,000.00 issued by the Company to Credit Lyonnais
                      New York Branch, as agent. (13)
                               
                                       19
<PAGE>
                           

     10.25            Revolving Credit Note, dated April 20, 1998 in the amount
                      of $10,000,000.00 issued by the Company to Fleet National 
                      Bank, as agent. (13)

     10.26            Revolving Credit Note, dated April 20, 1998 in the amount 
                      of $10,000,000.00 issued by the Company to LaSalle 
                      National Bank, as agent.(13)
 
     10.27            Revolving Credit Note, dated April 20, 1998 in the amount 
                      of $10,000,000.00 issued by the Company to Cooperatieve 
                      Centrale Raiffeisen - Boeren Leenbank B.A. "Rabobank 
                      Nederland", as agent. (13)

     10.28            Operating Agreement for Southern California Stone Center, 
                      L.L.C.  (9)

     10.29            Lease Agreement dated July 1, 1995 between Kidney Stone 
                      Center of South Florida, L.C. and Madorsky and Pinon 
                      Kidney Stone Center of South Florida, P.A. (9)

     10.30*           Employment Agreement dated October 8, 1997 between Prime 
                      Medical Services, Inc. and Robert Bachman. (12)

     10.31*           Employment Agreement dated October 8, 1997 between Prime 
                      Medical Services, Inc. and Larry Sodomire. (12)
 
     10.32            Partnership Interest Purchase Agreement dated May 1, 1997 
                      among Prime Lithotripter Operations,  Inc., Tenn-Ga Stone 
                      Group Two, L.P., NGST, Inc. and all the shareholders of 
                      NGST, Inc. (12)

     10.33            Stock Purchase Agreement dated June 1, 1997 between Sun 
                      Medical Technologies, Inc. and Executive Medical 
                      Enterprises, Inc. (12)

     10.34            Contribution Agreement dated October 8, 1997 between Prime
                      Medical Services, Inc. and AK Associates. (12)

     10.35            Confidential Assignment Summary for Pacific Medical 
                      Limited Partnership.(14)

     10.36            Limited Partnership Agreement for Texas Lithotripsy VII,
                      L.P. (14)

     10.37            Agreement and Plan of Merger of Texas Lithotripsy Limited 
                      Partnership II, L.P., Texas Lithotripsy Limited 
                      Partnership IV, L.P. and Texas ESWL/Laser Lithotripter, 
                      Ltd. (14)

     10.38            Limited Partnership Agreement for Big Sky Urological 
                      Limited Partnership.(14)

                                       20
<PAGE>

                           

     10.39            Operating Agreement for Kentucky I Lithotripsy, LLC. (14)

     10.40            Confidential Private Placement Memorandum for Tennessee 
                      Valley Lithotripter Limited Partnership. (14)

     10.41            Confidential Private Placement Memorandum for Fayetteville
                      Lithotripters Limited Partnership - Arkansas I. (14)

     10.42            Confidential Private Placement Memorandum for Texas 
                      Lithotripsy Limited Partnership I, L.P. (14)

     10.43            Operating Agreement for Washington Urological Services, 
                      LLC. (14)

     10.44*           Amended and Restated 1993 Stock Option Plan, as amended 
                      June 10, 1998. (10)

     10.45            Agreement of Limited Partnership of Wyoming Urological
                      Services, L.P. (14)

     10.46            Indenture Agreement dated March 27, 1998 between Prime
                      Medical Services, Inc. and State Street Bank and Trust
                      Company of Missouri, N.A. (8) 

     12               Computation of ratio of earnings to fixed charges (14)

     21.1             List of subsidiaries of the Company.  (14)

     23.1             Independent Auditors' Consent of KPMG LLP.   (14)

     27               Financial Data Schedule (14)
 ______________

     *   Executive compensation plans and arrangements.

     (1) The exhibits listed above will be furnished to any security holder upon
written request for such exhibit to Cheryl L. Williams,  Prime Medical Services,
Inc.,  1301 Capital of Texas  Highway,  Suite C-300,  Austin,  Texas 78746.  The
Securities and Exchange Commission (the "SEC") maintains a website that contains
reports,  proxy  and  information  statements  and other  information  regarding
registrants that file electronically with the SEC at "http://www.sec.gov".

     (2)  Filed  as an  Exhibit  to  the  Registration  Statement  on  Form  S-4
(Registration No. 33-56900) of the Company and incorporated herein by reference.

     (3) Filed as an Exhibit to the  Current  Report on  Form 8-K of the Company
dated October 18, 1993 and incorporated herein by reference.

     (4) Filed as an  Exhibit to the Annual  Report on  Form 10-K  of Old Prime,
Commission  File  Number  0-9963,  for the  year  ended  December 31,  1992  and
incorporated herein by reference.

     (5) Filed as an Exhibit to the Current Report on Form 8-K dated May 5, 1994
of the Company and incorporated herein by reference.

     (6) Filed as an  Exhibit to the  Current  Report on Form 8-K dated July 28,
1994 of the Company and incorporated herein by reference.

                                       21
<PAGE>



     (7) Filed as an Exhibit to the Current  Report on Form 8-K dated  September
13, 1994 of the Company and incorporated herein by reference.

     (8) Filed as an Exhibit to the Quarterly Report on Form 10Q for the period
ended June 30, 1998.

     (9) Filed as an Exhibit to the  Annual  Report on Form 10-K of the  Company
for the year ended December 31, 1995.

     (10)  Filed  as an  Exhibit  to the  Registration  Statement  on  Form  S-8
(Registration  No.  333-  62245)  of the  Company  and  incorporated  herein  by
reference.

     (11) Not used.

     (12) Filed as an Exhibit to the Annual  Report on Form 10-K of the  Company
for the year ended December 31, 1997.

     (13) Filed as an Exhibit to the Quarterly Report on Form 10Q for the period
ended September 30, 1998.

     (14) Filed herewith.





                                       22
<PAGE>

                                   SIGNATURES

     Pursuant  to the  requirements  of  Section  13 or 15(d) of the  Securities
Exchange Act of 1934, the registrant has duly caused this report to be signed on
its behalf by the undersigned, thereunto duly authorized.

                                         PRIME MEDICAL SERVICES, INC.



                                         By /s/ Joseph Jenkins, M.D., J.D.   
                                            ---------------------------------   
                                          Joseph Jenkins, M.D., J.D., President,
                                          Chief Executive Officer and Director

                                         Date:  March 31, 1999

     Pursuant to the  requirements of the Securities  Exchange Act of 1934, this
report has been signed by the following  persons on behalf of the registrant and
in the capacities and on the dates indicated.



By: /s/ Kenneth S. Shifrin             
    --------------------------             
    Kenneth S. Shifrin
    Chairman of the Board

Date:  March 31, 1999


By: /s/ Cheryl L. Williams             
    --------------------------             
    Cheryl L. Williams
    Vice President of Finance, Secretary
    and Chief Financial Officer (Principal
    Financial and Accounting Officer)

Date:  March 31, 1999


By: /s/ Joseph Jenkins                 
    ----------------------                 
    Joseph Jenkins, M.D., President,
    Chief Executive Officer and Director

Date:  March 31, 1999





                                       23
<PAGE>



By: /s/ Paul Butrus                       
- - -------------------                       
    Paul Butrus, Director

Date:  March 31, 1999


By: /s/ William E. Foree               
- - ------------------------               
    William E. Foree, M.D., Director

Date:  March 31, 1999


By: /s/ John McEntire                  
- - ---------------------                  
     John McEntire, Director

Date:   March 31, 1999


By: /s/ William A. Searles           
- - --------------------------           
    William A. Searles, Director

Date:  March 31, 1999


By: /s/ Michael Spalding              
- - ------------------------              
    Michael Spalding, M.D., Director

Date:  March 31, 1999





                                       24
<PAGE>




                                   APPENDIX A

                                      INDEX

                                                                         Page


Independent Auditors' Report                                               A-2
Consolidated Financial Statements:
     Consolidated Statements of Income for the years                       
       ended December 31, 1998, 1997 and 1996.                             A-3
     Consolidated Balance Sheets at December 31, 1998 and 1997.            A-4
     Consolidated Statements of Stockholders' Equity                       
       for the years ended December 31, 1998, 1997 and 1996.               A-6
     Consolidated Statements of Cash Flows                                 
       for the years ended December 31, 1998, 1997 and 1996.               A-7
     Notes to Consolidated Financial Statements.                           A-11






                                                                           


                                       A-1
<PAGE>
                          Independent Auditors' Report




The Board of Directors and Shareholders
Prime Medical Services, Inc.:

     We have audited the accompanying consolidated financial statements of Prime
Medical   Services,   Inc.  and  subsidiaries   ("Company")  as  listed  in  the
accompanying   index.   These   consolidated   financial   statements   are  the
responsibility of the Company's management.  Our responsibility is to express an
opinion on these consolidated financial statements based on our audits. 

     We conducted  our audits in accordance  with  generally  accepted  auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the  accounting  principles  used and  significant  estimates  made by
management, as well as evaluating the overall financial statement presentation. 
We believe that our audits provide a reasonable basis for our opinion.

     In our opinion,  the consolidated  financial  statements  referred to above
present  fairly,  in all  material  respects,  the  financial  position of Prime
Medical  Services,  Inc. and subsidiaries at December 31, 1998 and 1997, and the
results  of their  operations  and their cash flows for each of the years in the
three-year period ended December 31, 1998, in conformity with generally accepted
accounting principles.





Austin, Texas
March 1, 1999


                                       A-2
<PAGE>


                  PRIME MEDICAL SERVICES, INC. AND SUBSIDIARIES
                        CONSOLIDATED STATEMENTS OF INCOME

($ in thousands, except per share data)
<TABLE>
<S>                                                                    <C>              <C>              <C>    

                                                                                 Years Ended December 31,           
                                                                            1998           1997            1996
                                                                        --------         -------          -------
Fee Revenue:                                                                                 
   Lithotripsy:
         Fee revenues                                                   $ 83,879         $84,537          $65,138
         Management fees                                                   5,284           6,237            4,698
         Equity income                                                     2,890           2,339            1,766
                                                                        --------         -------          -------
                                                                          92,053          93,113           71,602
 
   Manufacturing                                                          11,066           2,358               --
   Prostatherapy                                                           1,207              --               --
   Cardiac and other                                                         310             508              802
                                                                        --------         -------          -------
         Total fee revenue                                               104,636          95,979           72,404
                                                                        --------         -------          -------
 Cost of services and general and
       administrative expenses:
         Lithotripsy                                                      22,674          25,381           19,922
         Manufacturing                                                     9,204           1,743              --
         Prostatherapy                                                       803              --              --
         Cardiac and other                                                   249             478              632
         Corporate                                                         4,926           5,683            4,245
         Nonrecurring development and other costs                          1,617              --              --
                                                                        --------         -------          -------
                                                                          39,473          33,285           24,799
 
    Depreciation and amortization                                         10,476           9,911            8,422
                                                                        --------         -------          -------
         Total operating expenses                                         49,949          43,196           33,221
                                                                        --------         -------          -------
Operating income                                                          54,687          52,783           39,183
 
Other income (deductions):
     Interest and dividends                                               1,417              740              459
     Interest expense                                                    (8,469)          (7,477)          (5,977)
     Loan fees and stock offering costs                                  (4,978)            (360)          (3,535)
     Other, net                                                             304                6              370
                                                                        --------         -------          -------
                                                                        (11,726)          (7,091)          (8,683)
Income before provision for income taxes
     and minority interest                                                42,961          45,692           30,500
 
Minority interest in consolidated income                                  24,790          25,041           19,543
 
Provision for income taxes                                                 7,377           5,795            1,996
                                                                        --------         -------          ------- 
Net income                                                              $ 10,794         $14,856          $ 8,961
                                                                        ========         =======          =======

Basic earnings per share:
     Net income                                                            $0.58           $0.77            $0.51
                                                                           =====           =====            =====
 
     Weighted average shares outstanding                                  18,650          19,275           17,633
                                                                          ======          ======           ======
 
Diluted earnings per share:
     Net income                                                            $0.57           $0.76            $0.49
                                                                           =====           =====            =====
 
     Weighted average shares outstanding                                  18,783          19,461           18,638
                                                                          ======          ======           ======
</TABLE>


          See accompanying notes to consolidated financial statements.
                                       A-3

<PAGE>
                                                            

                  PRIME MEDICAL SERVICES, INC. AND SUBSIDIARIES
                           CONSOLIDATED BALANCE SHEETS

($ in thousands)
<TABLE>
<S>                                                                                   <C>               <C>   

                                                                                              December 31,        
                                                                                          1998              1997  
                                                                                       ---------         ---------
ASSETS

Current assets:
     Cash                                                                              $  40,146         $  23,770
     Accounts receivable, less allowance
       for doubtful accounts of $966 in 1998
       and $811 in 1997                                                                   22,321            19,387
     Other receivables                                                                     2,228             1,103
     Deferred income taxes                                                                 2,330             1,506
     Prepaid expenses and other current assets                                             2,774             1,776
                                                                                       ---------         ---------
          Total current assets                                                            69,799            47,542
                                                                                       ---------         ---------
Property and equipment:
     Equipment, furniture and fixtures                                                    34,485            32,673
     Building and leasehold improvements                                                   2,073               531
                                                                                       ---------         ---------
                                                                                          36,558            33,204
Less accumulated depreciation and
     amortization                                                                        (18,471)          (13,497)
                                                                                       ---------         ---------
     Property and equipment, net                                                          18,087            19,707
                                                                                       ---------         ---------

Other investments                                                                         11,491            12,305
Goodwill, at cost, net of amortization                                                   140,863           143,823
Other noncurrent assets                                                                      879             2,449
                                                                                       ---------         ---------
                                                                                        $241,119          $225,826
                                                                                        ========          ========

</TABLE>














                                                                     (continued)
          See accompanying notes to consolidated financial statements.
                                       A-4
<PAGE>

                  PRIME MEDICAL SERVICES, INC. AND SUBSIDIARIES
                     CONSOLIDATED BALANCE SHEETS (continued)


($ in thousands)
<TABLE>
<S>                                                                                   <C>               <C> 

                                                                                                December 31,        
                                                                                          1998              1997  
                                                                                       ---------         ---------
LIABILITIES:

Current liabilities:
 
Current portion of long-term debt                                                     $      890          $ 11,138
Accounts payable                                                                           6,208             5,386
Accrued distributions to minority interests                                                8,951             8,655
Accrued expenses                                                                          12,051            12,204
                                                                                       ---------         ---------
     Total current liabilities                                                            28,100            37,383

Long-term debt, net of current portion                                                   100,987            71,198
Deferred income taxes                                                                      4,789             5,809
                                                                                       ---------         ---------
     Total liabilities                                                                   133,876           114,390

Minority interest                                                                         17,493            19,372

STOCKHOLDERS' EQUITY:

Preferred stock, $.01 par value,
  1,000,000 shares authorized;
  none outstanding                                                                            --                --
Common stock, $.01 par value,
  40,000,000 shares authorized;
  19,350,267 issued in 1998 and
  19,306,267 issued in 1997                                                                  194               193
Capital in excess of par value                                                            87,380            84,050
Accumulated earnings                                                                      18,615             7,821
Treasury stock, at cost, 1,845,200 shares                                                (16,439)               --
                                                                                       ---------         ---------
     Total stockholders' equity                                                           89,750            92,064
                                                                                       ---------         ---------
                                                                                       $ 241,119         $ 225,826
                                                                                       =========         =========

</TABLE>









          See accompanying notes to consolidated financial statements.
                                       A-5
<PAGE>

                          PRIME MEDICAL SERVICES, INC.
                 CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
              For the years ended December 31, 1998, 1997 and 1996
($ in thousands, except share data)
<TABLE>
<S>                                        <C>        <C>        <C>          <C>           <C>          <C>        <C>        

                                                Issued           Capital in   Accumulated
                                               Common Stock      Excess of     Earnings      Treasury Stock
                                             Shares    Amount    Par Value     (Deficit)       Shares     Amount      Total
                                           ----------  ------    -----------  ------------  ----------  ---------   ---------

Balance, January 1, 1996                   14,729,663     $147     $58,700     $(  15,996)      30,000   $(   101)    $42,750

  Net income for the year                       --         --          --           8,961          --         --        8,961
  Issuance of stock                         1,636,364       17      14,903           --            --         --       14,920
  Exercise of stock options                                                                                                        
      including tax benefit of
      $130 on non-qualifying
      exercises                               477,666        5         488           --            --         --          493
  Debt converted to stock                     921,415        9       5,241           --            --         --        5,250
  Exercise of warrants                      1,343,825       13       4,040           --            --         --        4,053
  Retirement of treasury
      stock                                   (30,000)     --         (101)          --        (30,000)       101         --
                                           ----------  -------  -----------  ------------  -----------  --------   ---------
Balance, December 31, 1996                 19,078,933      191      83,271         (7,035)         --         --       76,427

  Net income for the year                        --        --          --          14,856          --         --       14,856

  Exercise of stock options                                                                                                        
      including tax benefit of
      $438 on non-qualifying
      exercises                               227,334        2         779           --            --         --          781
                                           -----------  -------  -----------  ------------  -----------  --------   ---------
Balance, December 31, 1997                 19,306,267      193      84,050          7,821          --         --       92,064


  Net income for the year                         --       --         --           10,794          --         --       10,794
  Tax benefits on  exercised                      --       --        3,096           --            --         --        3,096
       warrants
  Exercise of stock options                                                                                                       
    including tax benefit of
    $140 on non-qualifying
    exercises                                  44,000        1         234           --            --         --          235
 Purchase of treasury stock                       --       --                               (1,845,200)   (16,439)    (16,439)
                                           -----------  -------  -----------  ------------  -----------  --------   ---------      

Balance, December 31, 1998                 19,350,267     $194     $87,380     $   18,615   (1,845,200)  $(16,439)  $  89,750
                                           ==========     ====     =======     ==========   ==========   ========   =========
</TABLE>


          See accompanying notes to consolidated financial statements.
                                       A-6
<PAGE>


                  PRIME MEDICAL SERVICES, INC. AND SUBSIDIARIES
                      CONSOLIDATED STATEMENTS OF CASH FLOWS

($ in thousands)
                                              Years Ended December 31,         
                                           1998         1997          1996
                                           ----         ----          ----

CASH FLOWS FROM OPERATING ACTIVITIES:
  Fee and other revenue collected        $ 98,649      $90,924       $72,452
  Cash paid to employees, suppliers
      of goods and others                 (39,748)     (31,685)      (22,455)
  Interest received                         1,417          739           459
  Interest paid                           ( 7,261)     ( 7,521)      ( 5,104)
  Taxes paid                              ( 7,506)     (   764)      ( 1,015)
                                          -------      -------       ------- 

           Net cash provided by 
           operating activities            45,551       51,693        44,337
                                           ------       ------        ------

CASH FLOWS FROM INVESTING ACTIVITIES:
  Purchase of lithotripter entities           --       (20,217)      (66,742)
  Purchases of equipment and leasehold
       improvements                       ( 5,213)     ( 4,546)      ( 2,526)
  Deferred payments on 
     lithotripter entities                    --           --        ( 3,387)
  Proceeds from sales of equipment            224           30             6
  Investments                               2,532        1,690         1,257
  Other                                       315           94       (   378)
                                              ---           --       ------- 

           Net cash used by 
           investing activities           ( 2,142)     (22,949)      (71,770)
                                          -------      -------       ------- 

CASH FLOWS FROM FINANCING ACTIVITIES:
  Payments on notes payable 
       exclusive of interest             ( 80,484)     (50,328)      (15,351)
  Borrowings on notes payable             100,025       51,201        74,000
  Distributions to minority interest     ( 25,799)     (28,667)      (13,440)
  Debt issuance costs                      (4,417)         --        ( 2,735)
  Contributions by minority interest           72        2,381           --
  Exercise of stock options                     9          343           363
  Purchase of treasury stock             ( 16,439)         --            --
                                          -------      -------       -------
           Net cash provided by 
          (used in) financing 
           activities                    ( 27,033)     (25,070)       42,837
                                         --------      -------        ------

NET INCREASE IN CASH AND CASH
    EQUIVALENTS                            16,376        3,674        15,404

Cash and cash equivalents, 
     beginning of period                   23,770       20,096         4,692
                                           ------       ------         -----


Cash and cash equivalents, 
     end of period                       $ 40,146      $23,770       $20,096
                                         ========      =======       =======






          See accompanying notes to consolidated financial statements.
                                       A-7


<PAGE>



                  PRIME MEDICAL SERVICES, INC. AND SUBSIDIARIES
                CONSOLIDATED STATEMENTS OF CASH FLOWS (continued)

($ in thousands)


                                                     Years Ended December 31,
                                                  1998         1997        1996
                                                  ----         ----        ----

Reconciliation of net income to net
 cash provided by operating activities
  Net income                                    $ 10,794     $14,856    $ 8,961
  Adjustments to reconcile net
    income to cash provided by
    operating activities:
       Minority interest in consolidated income   24,790      25,041     19,543
       Depreciation and amortization              10,476       9,911      8,422
       Provision for uncollectible accounts          252         427        319
       Equity in earnings of affiliates           (2,890)     (2,339)    (1,766)
       Debt issuance costs                         4,417         --       2,735 
       Provision for deferred income taxes          (442)         68        974
       Writeoff of loan fees                         --          --         696
       Other                                        (100)      1,159         (7)
       Changes in operating assets and liabilities,
         net of effect of purchase transactions:
           Accounts receivable                    (3,186)     (3,156)     1,284
           Other receivables                        (910)        754        472
           Other current assets                   (1,244)       (602)       529
           Accounts payable                          822         934        452
           Accrued expenses                        2,772       4,640      1,723
                                                   -----       -----      -----

        Total adjustments                         34,757      36,837     35,376
                                                  ------      ------     ------

        Net cash provided by 
        operating activities                     $45,551     $51,693    $44,337
                                                 =======     =======    =======














          See accompanying notes to consolidated financial statements.
                                       A-8
<PAGE>

                  PRIME MEDICAL SERVICES, INC. AND SUBSIDIARIES
                CONSOLIDATED STATEMENTS OF CASH FLOWS (continued)

($ in thousands)
<TABLE>
<CAPTION>
<S>                                                                                <C>              <C>               <C>     
                                                                                          Years Ended December 31,            
                                                                                    1998              1997             1996
                                                                                    ----              ----             ----

SUPPLEMENTAL INFORMATION OF
  NON-CASH INVESTING AND
  FINANCING ACTIVITIES:

At December 31, 1998, the Company had accrued
     distributions payable to minority interests.  The
     effect of this transaction was as follows:

           Current liabilities increased by                                         $8,951
           Minority interest decreased by                                            8,951

In 1998, the Company recognized tax benefits associated
     with warrants previously exercised.  The effect of this
     was as follows:
           Current liabilities decreased by                                          1,512
           Noncurrent liabilities decreased by                                       1,584
           Stockholders' equity increased by                                         3,096

In 1997, the Company acquired (1) additional
     ownership interests in 10 partnerships
     (2) a 38.25% general partnership interest in a
     lithotripter operation (3) 100% of the stock
     of a lithotripter operator and (4) 75% equity
     interest in a trailer manufacturer.  These
     transactions are discussed further in Notes C and D.
     The acquired assets and liabilities were as follows:

           Current assets decreased by                                                              $  9,532
           Noncurrent assets increased by                                                              4,041
           Goodwill increased by                                                                      15,836
           Current liabilities increased by                                                            1,343
           Noncurrent liabilities increased by                                                        10,000
           Minority interest decreased by                                                                998
 
  At December 31, 1997, the Company had accrued
     distributions payable to minority interests.  The
     effect of this transaction was as follows:

           Current liabilities increased by                                                            8,655
           Minority interest decreased by                                                              8,655

</TABLE>

          See accompanying notes to consolidated financial statements.
                                       A-9





<PAGE>

                  PRIME MEDICAL SERVICES, INC. AND SUBSIDIARIES
                CONSOLIDATED STATEMENTS OF CASH FLOWS (continued)

($ in thousands)
<TABLE>
<S>                                                                                 <C>               <C>             <C>

                                                                                         Years Ended December 31,           
                                                                                    1998              1997             1996
                                                                                    ----              ----             ----
  In 1996, the Company acquired (1) 100%
     of the outstanding stock of a corporation
     which operated 31 lithotripters and (2)
     increased ownership in two partnerships, in
     which the Company is the managing general
      partner.  These transactions are discussed
     further in Note D.  The acquired assets
     and liabilities were as follows:

           Current assets increased by                                                                                $19,032
           Noncurrent assets increased by                                                                              12,630
           Goodwill increased by                                                                                       82,297
           Current liabilities increased by                                                                            13,110
           Noncurrent liabilities increased by                                                                         69,712
           Minority interest increased by                                                                              16,218
           Stockholders' equity                                                                                        14,919

  In 1996, several holders of notes issued by the
     Company elected to convert the outstanding
     balances of the notes into 921,000 shares
     of the Company stock.  In addition, certain
     holders of warrants exercised their warrants and
     the Company issued 1,344,000 shares of the
     Company's stock to the warrant holders.  The
     effect of these transactions were as follows:

           Current assets increased by                                                                                  1,749
           Current liabilities decreased by                                                                             4,062
           Noncurrent liabilities decreased by                                                                          3,493
           Stockholders' equity increased by                                                                            9,304

  At December 31, 1996, the Company had accrued
     distributions payable to minority interests.  The
     effect of this transaction was as follows:

           Current liabilities increased by                                                                            10,705
           Minority interest decreased by                                                                              10,705





</TABLE>





          See accompanying notes to consolidated financial statements.
                                      A-10

<PAGE>


 



                  PRIME MEDICAL SERVICES, INC. AND SUBSIDIARIES
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

A. ORGANIZATION AND OPERATION OF THE COMPANY

     Prime Medical  Services,  Inc.  ("Prime"),  through its direct and indirect
wholly-owned   subsidiaries,   provides   non-medical   management  services  to
lithotripsy,  prostatherapy,  and cardiac rehabilitation centers.  References to
the Company are to Prime and its controlled and affiliated entities. The Company
also manufactures trailers for major medical equipment  manufacturers and mobile
medical service providers. The Company operates lithotripters in 34 states.

B. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

     Consolidation

     The consolidated  financial  statements  include the accounts of Prime, its
wholly-owned  subsidiaries,  entities more than 50% owned and partnerships where
Prime has control,  even though its ownership is less than 50%.  Investments  in
entities in which the Company's  investment is less than 50% ownership,  and the
Company does not control, are accounted for by the equity method if ownership is
between 20% - 50%, or by the cost method if ownership is less than 20%.  Through
December 31, 1998, the Company had recognized $435,000 in undistributed earnings
using the equity  method.  This amount  represents  undistributed  earnings from
entities,  in which the Company owns 50% or less, and does not exhibit  control.
All significant intercompany accounts and transactions have been eliminated.

     Cash Equivalents

     The  Company  considers  as  cash  equivalents   demand  deposits  and  all
short-term investments with an original maturity of three months or less.

     Property and Equipment

     Property  and  equipment  are  stated  at  cost.   Major   betterments  are
capitalized  while  normal  maintenance  and repairs are charged to  operations.
Depreciation  is computed by the  straight-line  method using  estimated  useful
lives of five to ten years.  Leasehold improvements are generally amortized over
ten years or the term of the lease,  whichever is shorter.  When assets are sold
or retired, the corresponding cost and accumulated  depreciation or amortization
are  removed  from the  related  accounts  and any gain or loss is  credited  or
charged to operations.

     Intangible Assets

     The Company  records as goodwill the excess of the purchase  price over the
fair value of the net assets  associated with acquired  businesses.  Goodwill is
amortized over a period not to exceed forty years using the straight-line basis.
Accumulated  amortization  at  December  31,  1998 and 1997 is  $13,807,000  and
$9,745,000, respectively. Goodwill is reviewed for impairment whenever events or
changes  in  circumstances   indicate  that  the  carrying  amount  may  not  be
recoverable.  If the sum of the expected future  undiscounted cash flows is less
than  the  carrying  amount  of the  goodwill,  a loss  is  recognized  for  the
difference between the fair value and carrying value of the goodwill.



                                      A-11
<PAGE>

                  PRIME MEDICAL SERVICES, INC. AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
 


     Revenue Recognition

     Revenues generated from management services and the manufacture of trailers
are recognized as they are earned.

     The  Company's  lithotripsy  fee  revenues  are based upon fees charged for
services to hospitals,  commercial insurance carriers,  state and federal health
care agencies, and individuals, net of contractual fee reductions.

     At December 31, 1998,  approximately  17% of accounts  receivable relate to
units  operating in Texas,  11% relate to units  located in  Louisiana,  and 10%
relate to units located in California.

     Income Tax

     Deferred  tax  assets and  liabilities  are  recognized  for the future tax
consequences   attributable  to  differences  between  the  financial  statement
carrying  amounts of existing assets and  liabilities  and their  respective tax
bases and operating loss and tax credit  carryforwards.  Deferred tax assets and
liabilities  are measured  using enacted tax rates  expected to apply to taxable
income in the years in which  those  temporary  differences  are  expected to be
recovered  or settled.  The effect on deferred tax assets and  liabilities  of a
change in tax rates is  recognized  in income in the period  that  includes  the
enactment date.

     Long-Lived Assets

     Long-lived assets are reviewed for impairment whenever events or changes in
circumstances  indicate that the carrying amount may not be recoverable.  If the
sum of the  expected  future  undiscounted  cash flows is less than the carrying
amount of the asset, a loss is recognized,  for the difference  between the fair
value and carrying value of the asset.

     Accounts Receivable

     Accounts  receivable  are recorded  based on revenues,  less  allowance for
doubtful accounts and contractual adjustments.

     Stock-Based Compensation

     Upon  adoption of  Statement  of  Financial  Accounting  Standards  No.123,
Accounting for Stock-Based  Compensation ("Statement 123"), in 1996, the Company
continued  to  measure   compensation   expense  for  its  stock-based  employee
compensation  plans using the intrinsic  value method  prescribed by APB Opinion
No. 25, Accounting for Stock Issued to Employees.  The Company provides proforma
disclosures  of net income  and  earnings  per share as if the fair  value-based
method  prescribed by Statement  123 had been applied in measuring  compensation
expense. (See Note J).
     


                                      A-12

<PAGE>
                  PRIME MEDICAL SERVICES, INC. AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)



     Debt Issuance Costs

     The Company expenses debt issuance costs as incurred.

     Estimates Used to Prepare Financial Statements

     Management uses estimates and assumptions in preparing financial statements
in accordance with generally accepted accounting principles. Those estimates and
assumptions  affect  the  reported  amounts  of  assets  and  liabilities,   the
disclosure of contingent  assets and liabilities,  and the reported revenues and
expenses.  Actual  results  could vary from the  estimates  that were assumed in
preparing the financial statements.

     Reclassification

     Certain  reclassifications  have been made to amounts presented in previous
years to be consistent with the 1998 presentation.

     Earnings Per Share

     Basic  earnings  per  share  is  based  on  the  weighted   average  shares
outstanding without any dilutive effects considered.  Diluted earnings per share
reflects dilution from all contingently  issuable shares,  including options and
convertible  debt.  A  reconciliation  of such  earnings  per  share  data is as
follows:


(In thousands, except per share data)

                  1998


                                                              Per Share 
                                      Income      Shares        Amount 
                                      ------      ------        ------ 
     Basic EPS
     Net Income.....................   $ 10,794    18,650      $   0.58
                                                               ========
     Effect of dilutive securities:
     Options .  . ..................                  133
                                                      ---
     Diluted EPS....................   $ 10,794    18,783      $   0.57
                                       ========    ======      ========














                                      A-13
<PAGE>

                  PRIME MEDICAL SERVICES, INC. AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
 


                  Earnings Per Share continued

               1997
                                                                 Per Share 
                                        Income      Shares        Amounts
                                        ------      ------        -------
     Basic EPS
     Net Income.....................    $14,856     19,275        $   0.77
                                                                  ========
     Effect of dilutive securities:
     Options .  . ..................                   186
                                                       ---
     Diluted EPS....................    $14,856     19,461        $   0.76
                                        =======     ======        ========


               1996
                                                                Per Share
                                          Income   Shares         Amounts
                                          ------   ------         -------
     Basic EPS
     Net Income.....................     $ 8,961   17,633         $   0.51
                                                                  ========    
     Effect of dilutive securities:
     Warrants . ....................                  400
     Convertible Debt...............         101      224
     Options . . ...................                  381
                                                      ---
     Diluted EPS....................     $ 9,062   18,638         $   0.49
                                         =======   ======         ========


     Unexercised  employee  stock  options to  purchase  1,708,000,  841,000 and
706,000  shares of Prime common  stock as of December  31, 1998,  1997 and 1996,
respectively,  were not included in the  computations of diluted EPS because the
options  exercise  prices were greater than the average  market price of Prime's
common stock during the respective periods.

C. INVESTMENTS

     Tenn-Ga
 
     In May 1997, the Company  acquired a 38.25% general  partner  interest in a
partnership that provides mobile  lithotripsy  service in Tennessee and Georgia.
The purchase  price was cash of  $3,470,000.  This  investment  is accounted for
using the equity method.

     Southern California

     Effective June 1, 1995, the Company  acquired a 32.5% interest in a limited
liability  company  that  operates a fixed site  lithotripter  near Los Angeles,
California. This investment is accounted for using the equity method.

     Texas, Ohio & Louisiana Partnerships

     In December  1994,  the Company  acquired  all of the common stock of three
corporations.  Each  corporation is the general partner and holds an approximate
20%  interest in a limited  partnership  which  operates a mobile  lithotripter.
Texas ESWL/Laser  Lithotripter,  Ltd.  operates a mobile  lithotripter in Texas,
Oklahoma and


                                      A-14
<PAGE>

                 PRIME MEDICAL SERVICES, INC. AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
 


     Arkansas. Ohio Mobile Lithotripter,  Ltd. operates a mobile lithotripter in
Ohio.  Arklatx  Mobile  Lithotripter,  L.P.  operates a mobile  lithotripter  in
Louisiana. This investment is accounted for using the equity method.
 
     American Physicians Service Group, Inc.

     At December 31, 1998 and 1997, the Company owned 1,000 and 50,000 shares of
common  stock,  representing  less than 1%, of the  outstanding  common stock of
American  Physicians Service Group, Inc. (APS). APS owned  approximately 18% and
16% of the  outstanding  common  stock of the Company at  December  31, 1998 and
1997,  respectively.  Two of the  Company's  seven board members are also on the
board of APS.

     The Company occupies  approximately 5,600 square feet of office space owned
by APS. The Company also shares certain personnel with APS. The monthly rent and
personnel cost is approximately $8,000.
 
     The Company purchased treasury stock shares through APS Financial Services,
Inc. The Company paid commissions of $100,000 to acquire 1,845,000 shares.

D. ACQUISITIONS

     Effective  September 1, 1997, the Company acquired a 75% equity interest in
AK Associates, LLC ("AK"), which provides installation,  upgrade, manufacturing,
refurbishment and repair services for major medical equipment  manufacturers and
mobile medical service providers. The purchase price was $4,761,000 in cash with
contingent  consideration  up to another  $1,050,000  being  payable  based upon
certain  performance  criteria  being  met by AK  during  1998.  The  contingent
consideration  was accrued at December 31, 1998 and paid in the first quarter of
1999.  This   transaction  was  accounted  for  using  the  purchase  method  of
accounting.

     Effective June 1, 1997, the Company acquired 100% of the stock of Executive
Medical  Enterprises,  Inc.  ("EME"),  which  operated  three  lithotripters  in
California, Oregon and Washington. The purchase price was $1,339,000 in cash and
potential   contingent   consideration  based  upon  the  performance  of  these
operations during 1998, 1999 and 2000. $400,000 of the contingent  consideration
was paid in 1998 and  $843,000  was accrued at December 31, 1998 and paid in the
first  quarter of 1999.  The  transaction  was  accounted for using the purchase
method of accounting.

     In January 1997, the Company purchased additional ownership interests in 10
partnerships,  which the Company controls. The purchase price for the additional
ownership  interests was $10,510,000 in cash. These  transactions were accounted
for using the purchase method of accounting.

     Unaudited  proforma  combined  income data for the years ended December 31,
1997 and 1996 of the Company and the  acquisitions  discussed above assuming all
were effective January 1, 1996 is as follows:

($ in thousands, except per share data)          1997                1996   
                                                 ----                ----   

                  Total revenues               $100,228             $81,143
                  Total expenses                 84,941              71,080
                                                 ------              ------

                    Net income                $  15,287             $10,063
                                              =========             =======

                  Diluted earnings per share  $    0.79             $  0.54
                                              =========             =======

                                      A-15

<PAGE>
                 PRIME MEDICAL SERVICES, INC. AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
 



     Effective  May 1, 1996,  the Company  acquired  100% of the common stock of
Lithotripters,   Inc.  ("Litho").   Litho  operated  31  lithotripters   serving
approximately  200 locations in 19 states.  The purchase  price was  $86,500,000
consisting  of  $71,600,000  cash and 1,636,000  shares of the Company's  common
stock  valued at  $14,900,000.  This  transaction  was  accounted  for using the
purchase method of accounting.

     Effective November 1, 1996, the Company increased its ownership interest in
two partnerships that operate lithotripters in Arkansas and South Carolina.  The
Company  acquired an additional  12.0%  interest in  Fayetteville  Lithotripters
Limited Partnership - Arkansas I and 2.7% interest in Fayetteville Lithotripters
Limited  Partnership - South  Carolina II, which the Company  manages as General
Partner.  The  purchase  price was  $1,291,000  in cash.  This  transaction  was
accounted for using the purchase method of accounting.

    
E. FAIR VALUE OF FINANCIAL INSTRUMENTS

     Statement of Financial Accounting Standards No. 107, Disclosures About Fair
Value of  Financial  Instruments  (Statement  107),  requires  that the  Company
disclose estimated fair values for its financial  instruments as of December 31,
1998 and 1997. The carrying amounts and fair values of the Company's significant
financial instruments are as follows:
<TABLE>
          <S>                                        <C>                   <C>            <C>             <C>    

                                                                   1998                               1997                 
                                                                   ----                               ----                 
                                                     Carrying              Fair           Carrying         Fair
           ($ in Thousands)                           Amount               Value           Amount          Value
           ----------------                           ------               -----           ------          -----
               Financial assets:
           Cash                                      $40,146               $40,146        $23,770         $23,770
           Accounts receivable                        22,321                22,321         19,387          19,387
           Other receivables                           2,228                 2,228          1,103           1,103
             
 
               Financial liabilities:
           Debt                                      101,877                92,603          82,336          82,336
           Accounts payable                            6,208                 6,208           5,386           5,386
</TABLE>

                                      A-16
<PAGE>
                 PRIME MEDICAL SERVICES, INC. AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

     The  following  methods  and  assumptions  were  used  by  the  Company  in
estimating its fair value disclosures for financial instruments.

     Cash

     The carrying amounts for cash approximate fair value because they mature in
less than 90 days and do not present unanticipated credit concerns.

     Accounts Receivable and Other Receivables

     The carrying value of these receivables  approximates the fair value due to
their short-term nature and historical collectibility.

     Debt

     The  carrying  value of debt in 1997  approximates  fair  value  since  the
majority was  primarily  floating rate debt based on current  market rates.  The
fair  value at  December  31,  1998  for the  $100  million  fixed  rate  senior
subordinated  notes were  present  valued  using the  market  rate of 10.456% as
quoted by Bloomberg Financial  Services.  The carrying value of the debt bearing
interest at prime rate approximates fair value.

     Accounts Payable

     The  carrying  value of the  payables  approximates  fair  value due to the
short-term nature of the obligation.


     Limitations

     Fair  value  estimates  are made at a  specific  point  in  time,  based on
relevant market information and information about the financial instrument. Fair
value  estimates  are based on existing on balance sheet  financial  instruments
without  attempting to estimate the value of anticipated future business and the
value of assets and liabilities that are not considered  financial  instruments.
Other  significant  assets and  liabilities  that are not  considered  financial
assets or liabilities include the deferred tax assets and liabilities,  property
and equipment,  equity  investment in partnerships,  goodwill,  other noncurrent
assets and accrued expenses.  In addition,  the tax ramifications related to the
realization of the unrealized gains and losses can have a significant  effect on
fair  value  estimates  and  have  not  been  considered  in the  aforementioned
estimates.






                                      A-17
<PAGE>
                 PRIME MEDICAL SERVICES, INC. AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

 


F.       ACCRUED EXPENSES

         Accrued expenses consist of the following:

                                            December 31,           December 31,
                                               1998                   1997   
                                               ----                   ----   
         ($ in Thousands)
 
         Legal fees                         $    1,280            $     634
         Accrued group insurance costs             206                  228
         Compensation and payroll 
          related expense                        2,958                1,787
         Taxes, other than income taxes          1,301                  439
         Accrued interest                        2,192                  984
         Income taxes payable                    1,229                4,229
         Deferred payments for acquisitions      1,950                1,339
         Other                                     935                2,564
                                                   ---                -----

                                               $12,051              $12,204
                                               =======              =======



    
       
 

                                      A-18
<PAGE>
                 PRIME MEDICAL SERVICES, INC. AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

G. INDEBTEDNESS

Long-term debt is as follows:
 
          ($ in thousands)
 


       Interest                                           December 31,         
         Rates                 Maturities          1998                1997   
         -----                 ----------          ----                ----   

       8.75%                     2008            $100,000            $    --
       60-day LIBOR
         plus 2 1/2%             1998                --               79,000
       Prime                   1999-2001            1,715              2,969
       Prime + 1%                1998                --                  200
       None                    2000-2006              162                161
       11.50%                    1998                --                    6
                                                  -------             ------
                                                  101,877             82,336
       Less current portion of
             long-term debt                           890             11,138
                                                      ---             ------
                                                 $100,987            $71,198
                                                 ========            =======


     In March 1998,  the Company  completed  an  offering of an  aggregate  $100
million of unsecured senior subordinated notes (the "Notes") due 2008. The issue
price  of the  notes  was  99.50  with an  8.75%  coupon.  Interest  is  payable
semiannually on April 1 and October 1, beginning  October 1, 1998. The financing
costs  associated  with this offering  totaling  $4,418,000 were expensed on the
accompanying  consolidated  statements of income. A portion of the proceeds from
the offering  were used to pay off the Company's $77 million of term loans under
its existing credit facility. (See Note P).

     The Notes  Indenture  restricts,  among  other  things,  the ability of the
Company and its Restricted  Subsidiaries to incur  additional  indebtedness  and
issue preferred stock, enter into sale and leaseback transactions,  incur liens,
pay dividends or make certain other restricted payments, apply net proceeds from
certain asset sales, enter into certain  transactions with affiliates,  merge or
consolidate  with any other  person,  sell  stock of  subsidiaries  and  assign,
transfer,  lease, convey or otherwise dispose of substantially all of the assets
of the Company.

     During 1998,  the Company  amended its bank  facility with Bank Boston from
$135 million to $100 million.  The facility consists of a $100 million revolving
credit facility  bearing  interest of LIBOR +1 to 2%, maturing in April 2003. At
December  31,  1998,  the entire $100  million  revolving  credit  facility  was
undrawn. At December 31, 1998, interest on the Company's bank facility was 8.6%.
The bank facility is collateralized by the assets of the Company,  including the
stock of its subsidiaries. 


     The stated  principal  repayments for all  indebtedness  as of December 31,
1998 are payable as follows:

                                               ($ in thousands)
                1999                             $    890
                2000                                  449
                2001                                  355
                2002                                   51
                2003                                    0
                Thereafter                        100,132


                                      A-19
<PAGE>

                 PRIME MEDICAL SERVICES, INC. AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

 


H. COSTS OF SERVICES AND GENERAL AND ADMINISTRATIVE EXPENSES

     Costs of services and general and  administrative  expenses  consist of the
following:

                                                Years  Ended December 31,
                                                -------------------------
                                             1998        1997            1996
                                             ----        ----            ----

            ($ in Thousands)
 
            Salaries, wages and benefits    $16,294      $15,779      $ 11,953
            Other costs of services           7,136        7,569         6,878
            General and administrative        3,225        3,595         1,941
            Legal and professional            2,551        2,064         1,315
            Manufacturing costs               8,294        1,394           --
            Other                             1,973        2,884         2,712
                                              -----        -----         -----
                                            $39,473      $33,285       $24,799
                                            =======      =======       =======


I. COMMITMENTS AND CONTINGENCIES

     At  December  31,   1998,   minimum   annual   rental   commitments   under
non-cancelable  operating  leases  for  equipment  and office  space are:

         ($ in thousands)

                    1999               $291
                    2000                260
                    2001                  2
                   
     Rent expense for  equipment  and office space for the years ended  December
31, 1998, 1997, and 1996 was $623,000, $568,000, and $360,000, respectively.

     The Company  sponsors a partially,  self-insured  group  medical  insurance
plan.  The plan is  designed  to provide a  specified  level of  coverage,  with
stop-loss coverage provided by a commercial insurer. The Company's maximum claim
exposure is limited to $35,000 per person per policy year. At December 31, 1998,
the  Company  had  244  employees  enrolled  in  the  plan.  The  plan  provides
non-contributory   coverage  for   employees  and   contributory   coverage  for
dependents.  The Company's  contributions totaled $623,000, in 1998, $351,000 in
1997, and $224,000 in 1996.







                                      A-20
<PAGE>
                 PRIME MEDICAL SERVICES, INC. AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

J. COMMON STOCK OPTIONS

     1993 Stock Option Plan

     The Company has elected to follow  Accounting  Principles Board Opinion No.
25,   "Accounting  for  Stock  Issued  to  Employees"  ("APB  25")  and  related
Interpretations  in  accounting  for its  employee  stock  options.  The Company
provides  proforma  disclosures  of net income and  earnings per share as if the
fair-value  based  method  prescribed  by  Statement  123 had  been  applied  in
measuring  compensation expense. Under APB 25, because the exercise price of the
Company's employee stock options equals the market price of the underlying stock
on the date of grant, no compensation expense is recognized.

     On October 12, 1993,  the Company  adopted the 1993 Stock Option Plan which
authorizes  the  grant of up to  2,000,000  shares  to  certain  key  employees,
directors,  and consultants  and advisors to the Company.  Options granted under
the 1993 Stock Option Plan shall terminate no later than ten years from the date
the  option  is  granted,  unless  the  option  terminates  sooner  by reason of
termination of employment, disability or death.

     In June 1997,  the Company  adopted an  amendment  to the 1993 Stock Option
Plan that authorized an additional 500,000 shares.

     In June 1998,  the Company  adopted an  amendment  to the 1993 Stock Option
Plan that authorized an additional 750,000 shares.

     A summary of the Company's stock option activity,  and related  information
for the years ended December 31, follows:
<TABLE>
<S>                           <C>            <C>                 <C>            <C>                 <C>            <C>

                                     1998                                1997                                1996

                              Options        Weighted-Average     Options       Weighted-Average     Options       Weighted-Average
                               (000)          Exercise Price       (000)         Exercise Price       (000)        Exercise Price
                               -----          --------------       -----         --------------       -----        --------------
Outstanding - beginning
    of year                     1,394           $11.04              1,228          $ 8.99              975            $ 1.31
Granted                           825             8.63                428           11.94              730             13.87
Exercised                         (44)            3.73               (227)           1.51             (477)             0.52
Forfeited                        (283)           12.58                (35)          12.19              (--)              --
                                 ----                                 ---                             -----                    
                                                                
Outstanding-end of year         1,892           $10.10              1,394          $11.04            1,228           $ 8.99
                              =======                            ========                            =====

Exercisable at end of year        806           $10.74                466          $ 8.21              422            $2.03
                                  ===           ======                ===          ======              ===            =====

Weighted-average fair
     value of options granted
     during the year            $3.40             --                $5.21            --              $6.13             --
                                =====                               =====                            =====               
</TABLE>

                                      A-21
<PAGE>

                 PRIME MEDICAL SERVICES, INC. AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
 





     The  following  table  summarizes  the  Company's  outstanding  options  at
December 31, 1998:
<TABLE>
          <S>                                <C>                 <C>            <C>                 <C>            <C>    

                                                                   Outstanding Options                 Exercisable Options
                                                                  Average        Weighted                           Weighted
                                                                 Remaining       Average                            Average
                                              Options            Contractual     Exercise           Options         Exercise
           Range of Exercise Prices              (000)               Life         Price              (000)           Price   
           ------------------------              -----               ----         -----              -----           -----   

           $  0.25 - $ 4.12                      155                1.6 years   $  0.44               151          $  0.37
           $  4.13 - $ 8.25                      464                4.7 years   $  7.45                11          $  5.99
           $  8.26 - $12.37                      565                1.2 years   $ 10.05               114          $ 10.36
           $ 12.38 - $16.50                      708                2.9 years   $ 14.00               530          $ 13.87
                                               -----                                                  ---
           Total                               1,892                                                  806
                                               =====                                                  ===
</TABLE>


     Pro forma  information  regarding  net  income  and  earnings  per share is
required  by  Statement  123,  and has been  determined  as if the  Company  had
accounted  for its employee  stock  options  under the fair value method of that
Statement.  The fair value for these  options was estimated at the date of grant
using a Black- Scholes option pricing model with the following  weighted-average
assumptions for 1996, 1997 and 1998,  respectively:  risk-free interest rates of
6.2%, 6.2%, and 5.2%;  dividend yields of 0%, 0% and 0%;  volatility  factors of
the expected  market price of the  Company's  common stock of .53, .46, and .42;
and a weighted- average expected life of the option of 4 years.

     The  Black-Scholes   option  valuation  model  was  developed  for  use  in
estimating the fair value of traded  options which have no vesting  restrictions
and are fully  transferable.  In addition,  option  valuation models require the
input of highly  subjective  assumptions  including  the  expected  stock  price
volatility.  Because the Company's  employee stock options have  characteristics
significantly different from those of traded options, and because changes in the
subjective input assumptions can materially  affect the fair value estimate,  in
management's  opinion, the existing models do not necessarily provide a reliable
single measure of the fair value of its employee stock options.

     For  purposes of pro forma  disclosures,  the  estimated  fair value of the
options is amortized to expense over the options' vesting period.  The Company's
pro forma  information  follows  (in  thousands  except for  earnings  per share
information):

                                           1998              1997          1996
                                           ----              ----          ----

                  Pro forma net income   $7,817             $12,448       $8,109
                                         ======             =======       ======
                  Pro forma earnings
                    per share
                      Basic               $0.42               $0.65        $0.46
                                          =====               =====        =====
                      Diluted             $0.42               $0.64        $0.44
                                          =====               =====        =====

                                      A-22
<PAGE>
                 PRIME MEDICAL SERVICES, INC. AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
                    
     Statement 123 calls for a prospective  application of compensation relating
to the grant of stock options and, consequently  pro-forma financial information
may not be indicative  of future  amounts until the new rules are applied to all
outstanding nonvested awards.

K. OTHER INCOME (EXPENSE)

     Included in other,  net in the  consolidated  statements  of income are the
following components:

                                                  Years Ended December 31,
($ in thousands)                         1998              1997             1996
- - ----------------                         ----              ----             ----
Collections on amounts 
    previously written off            $    --            $   --            $ 192
Gain on sale of investment in stock       144                --               --
Equipment rental                           --                --               58
Other income                              160                 6              120
                                          ---             -----              ---
Other, net                               $304             $   6            $ 370
                                         ====             =====            =====


L. INCOME TAXES

     The  Company  files  a  consolidated  tax  return  with  its  wholly  owned
subsidiaries.  A substantial  portion of consolidated income is not taxed at the
corporate level as it represents income from partnerships. Accordingly, only the
portion  of  income  from  these  partnerships  attributable  to  the  Company's
ownership interests is included in taxable income in the consolidated tax return
and financial  statements.  The minority  interest portion of this income is the
responsibility of the individual partners.

     Income tax expense consists of the following:
     ($ in thousands)
                                           Years ended December 31,
                                       1998             1997             1996
                                       ----             ----             ----
           Federal
             Current                  $6,404          $ 4,369           $   97
             Deferred                   (442)              68              974
           State                       1,415            1,358              925
                                       -----            -----              ---
                                      $7,377           $5,795           $1,996
                                      ======           ======           ======
 
     A  reconciliation  of expected  income tax (computed by applying the United
States  statutory  income tax rate of 35% for 1998 and 1997 and 34% for 1996, to
earnings  before income  taxes) to total income tax expense in the  accompanying
consolidated statements of income follows:

                                      A-23
<PAGE>

                 PRIME MEDICAL SERVICES, INC. AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

 



         ($ in thousands)
                                           Years ended December 31,
                                         1998        1997       1996
                                         ----        ----       ----
          Expected federal income tax   $6,360      $7,228     $3,725
          Change in beginning of year
            valuation allowance           --        (2,399)    (3,093)
          State taxes                    1,415       1,358        925
          Other                           (398)    (   392)       439
                                          ----     -------        ---
                                        $7,377      $5,795     $1,996
                                        ======      ======     ======
 
     The tax  effects of  temporary  differences  that give rise to  significant
portions of the deferred tax assets and deferred tax liabilities at December 31,
1998 and 1997 are presented below:
         ($ in thousands)
                                                     1998                1997   
                                                     ----                ----   
 
         Deferred tax assets:
           Capitalized costs                         $2,381              $932
              Loan origination fees amortizable for
              tax purposes                            1,267               --
           Accounts receivable, principally due
              to allowance for doubtful accounts        248               266
            Accrued expenses deductible for tax
              purposes when paid                      2,082             1,240 
                                                      -----             ----- 
                  Total gross deferred tax assets     5,978             2,438
                  Less valuation allowance              --                --
                                                      -----             -----  
                  Net deferred tax assets             5,978             2,438
                                                      =====             =====
 
         Deferred tax liabilities:
            Property and equipment, principally due
              to differences in depreciation         $( 166)           $ (583)
            Investments in affiliated entities,
              principally due to undistributed income(2,703)           (2,807)
            Intangible assets, principally due to
              differences in amortization periods for
              tax purposes                           (5,568)           (2,419)
                                                     ------            ------ 
           Total gross deferred tax liability        (8,437)           (5,809)
                                                     ------            ------ 
            Net deferred tax liability               $2,459            $3,371
                                                     ======            ======
 
     There is no  valuation  allowance  for  deferred tax assets at December 31,
1998 and 1997. A decrease of $2,399,000 in 1997, primarily due to utilization of
net operating loss  carryforwards was recorded in 1997. The valuation  allowance
for deferred tax assets as of December  31, 1996 was $2,399,000. The valuation

                                      A-24
<PAGE>
                 PRIME MEDICAL SERVICES, INC. AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)



allowance  at December  31,  1996 was a result of  uncertainties  regarding  the
Company's  use  of  the  net  operating  loss   carryforwards   and  tax  credit
carryforwards  which  could have  become  limited in the event that the  Company
experienced a greater than 50% stock ownership change in a three-year period (as
defined in the Internal Revenue Service regulations).

     In assessing the realizability of deferred tax assets, management considers
whether it is more likely than not that some  portion or all of the deferred tax
assets will not be realized.  The ultimate realization of deferred tax assets is
dependent  upon the  generation of future  taxable  income during the periods in
which those temporary  differences become deductible.  Management  considers the
scheduled reversal of deferred tax liabilities, projected future taxable income,
and tax planning strategies in making this assessment.

     Based  upon the level of  historical  taxable  income and  projections  for
future  taxable   income  over  the  periods  which  the  deductible   temporary
differences reverse,  management believes it is more likely than not the Company
will realize the benefits of these deductible differences at December 31, 1998.

                                            
M. RELATED PARTY TRANSACTIONS

     See Note C for additional related party transactions  involving investments
in affiliates.

O. SEGMENT REPORTING

     The  Company  has  two  reportable   segments:   Medical,   which  includes
lithotripsy,   prostatherapy  and  cardiac   rehabilitation  and  Manufacturing.
Lithotripsy and prostatherapy  provides services related to the operation of the
lithotripters and prostatherapy units, including scheduling, staffing, training,
quality  assurance,  maintenance,  regulatory  compliance and  contracting  with
payors,  hospitals  and surgery  centers;  and cardiac  rehabilitation  provides
non-medical  management  services  for several  cardiac  rehabilitation  centers
pursuant to agreements with physicians, clinics and hospitals. The manufacturing
segment provides manufacturing services and installation, upgrade, refurbishment
and repair of major medical equipment for mobile medical service providers.

     The accounting  policies of the segments are the same as those described in
Note B, the summary of significant  accounting  policies.  The Company  measures
performance  based on the  pretax  income or loss from its  operating  segments,
which do not include unallocated  corporate general and administrative  expenses
and corporate interest revenue and expense.

     The Company's  segments are divisions that offer  different  services,  and
require  different  technology  and  marketing  approaches.  The majority of the
lithotripsy segment is comprised of acquired entities,  as is  the manufacturing
segment. Prostatherapy and cardiac segments were developed internally.


                                      A-25
<PAGE>
                 PRIME MEDICAL SERVICES, INC. AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

 


     All  of  the  Company's  revenues  are  earned  in the  United  States  and
long-lived  assets are located in the United  States.  The Company does not have
any major customers who account for more than 10% of its revenues.

<TABLE>
<S>                 <C>                <C>                 <C>           <C>                   <C>            <C>

(Amounts in              1998              1998              1997              1997              1996             1996
thousands)
                       Medical         Manufacturing       Medical        Manufacturing        Medical        Manufacturing
                       -------         -------------       -------        -------------        -------        -------------
Revenue from                         
external
customers              $93,570              $11,066        $93,621               $2,358        $72,404                $-0-

Intersegment
revenues                     0                  255              0                  185              0                   0

Interest
revenue                    511                    0            560                    0            374                   0

Interest
expense                    235                   38            314                    0            539                   0

Depreciation
and
amortization             10,359                   72          9,868                   18          8,274                   0

Segment profit           33,189                1,753         31,666                  403         23,209                   0

Segment assets          235,248                4,892        219,166                1,152        196,731                   0

Investment in
equity method
investees                10,605                    0         11,453                    0          7,377                   0

Capital 
Expenditures              3,557                1,580          4,473                   23          2,507                   0
</TABLE>

     The following is a reconciliation of revenues per above to the consolidated
revenues per the consolidated statements of income:
 
 

(Amounts in thousands)                       1998         1997         1996
- - ----------------------                       ----         ----         ----
Total revenues for reportable segments     $104,891      $96,164     $72,404
Elimination of intersegment revenues           (255)        (185)        --
                                           --------      -------     ------- 
Total consolidated revenues                $104,636      $95,979     $72,404 
                                           ========      =======     ======= 

     The  following  is a  reconciliation  of the measure of segment  profit per
above to consolidated  income  before  income  taxes  per the  consolidated
statements of income:


(Amounts in thousands)                           1998          1997       1996
- - ----------------------                           ----          ----       ----
Total segment profit for reportable segments   $34,942       $32,069    $23,209
Unallocated corporate expenses:                
  General and administrative                   ( 3,035)      ( 4,070)   ( 3,413)
  Net interest expense                         ( 7,292)      ( 6,983)   ( 5,354)
  Loan fees and stock offering costs           ( 4,978)      (   360)   ( 3,535)
  Nonrecurring development and other costs     ( 1,617)          --         --
  Other, net                                       151       (     5)        50
                                               --------      --------   --------
Unallocated corporate expenses total           (16,771)      (11,418)   (12,252)
                                               -------       -------    ------- 
Income before income taxes                     $18,171       $20,651    $10,957 
                                               =======       =======    ======= 

     The  following  is a  reconciliation  of  segment  assets  per above to the
consolidated assets per the consolidated balance sheets:


(Amounts in thousands)                          1998          1997        1996
- - ----------------------                          ----          ----        ----
Total segment assets                          $240,140     $220,318    $196,731
Unallocated corporate assets                       979        5,508       5,803
                                              --------     --------    --------
Consolidated total                            $241,119     $225,826    $202,534
                                              ========     ========    ========

     The  reconciliation  of the other significant items to the amounts reported
on the consolidated financial statements is as follows:
 
<TABLE>
<S>                   <C>      <C>      <C>        <C>       <C>        <C>          <C>       <C>       <C>

(Amounts in           1998     1998     1998       1997      1997       1997         1996      1996      1996
                      ----     ----     ----       ----      ----       ----         ----      ----      ----
thousands)
                      Segment  Corp-    Consoli-   Segment   Corp-      Consoli-     Segment   Corp-     Consoli-
                       Totals  orate    dated      Totals    orate      dated        Totals    orate     dated
                                        Totals                          Totals                           Totals
                                        ------                          ------                           ------
  Interest revenue       $511     $906    $1,417      $560     $180         $740        $374      $85      $  459

  Interest expense        273    8,196     8,469       314    7,163        7,477         539    5,438       5,977

  Depreciation         
   and amortization    10,431       45    10,476     9,886       25        9,911       8,274      148       8,422

  
  Capital 
  Expenditures          5,137       76     5,213     4,496       50        4,546       2,507       19       2,526
    

</TABLE>

     The  adjustments in 1998,  1997 and 1996 for interest  revenue and expense,
depreciation  and  amortization  and  expenditures  for segment assets represent
amounts recorded by the operations of the Company's corporate  functions,  which
have not been allocated to the segments.

P. CONDENSED FINANCIAL INFORMATION REGARDING GUARANTOR SUBSIDIARIES

     Condensed   consolidating  financial  information  regarding  the  Company,
Guarantor  Subsidiaries and  non-guarantor  subsidiaries as of December 31, 1998
and 1997 and for each of the years in the  three-year  period ended December 31,
1998  is  presented   below  for  purposes  of  complying   with  the  reporting
requirements of the Guarantor  Subsidiaries.  Separate financial  statements and
other disclosures  concerning each Guarantor  Subsidiary have not been presented
because  management  has  determined  that such  information  is not material to
investors.  The Guarantor  Subsidiaries  are wholly- owned  subsidiaries  of the
Company who have fully and  unconditionally  guaranteed  the Notes  described in
Note G.




                                      A-26
<PAGE>
                 PRIME MEDICAL SERVICES, INC. AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
                   Condensed Consolidating Statement of Income


                                                    Year Ended December 31, 1998
<TABLE>
<S>                                     <C>            <C>            <C>            <C>            <C>  
($ in thousands)
                                        Prime Medical   Guarantor     Non-Guarantor  Eliminating    Consolidated
                                        Services Inc.  Subsidiaries   Subsidiaries     Entries         Total 
                                        -------------  ------------   -------------   ---------       -------



Fee revenue:
  Lithotripsy:
     Fee revenues                         $      --      $22,487       $  61,392     $    --        $  83,879
     Management fees                             --        3,126           2,158          --            5,284
     Equity income                            30,952      20,077             --       (48,139)          2,890
  Manufacturing                                  --          --           11,066          --           11,066
  Prostatherapy                                  --          --            1,207          --            1,207
  Cardiac                                        --          310             --           --              310
                                          ----------     -------       ---------      -------       ---------   
                                              30,952      46,000          75,823      (48,139)        104,636
Costs and expenses:
Cost of services and general and
   administrative expenses:
     Lithotripsy                                 --        3,977          18,697          --           22,726
     Manufacturing                               --          --            9,204          --            9,204
     Prostatherapy                               --          --              803          --              803
     Cardiac                                     --          249            --            --              249
     Corporate                                   203       4,723            --            --            4,926
     Nonrecurring development 
          and other costs                      1,617         --             --            --            1,617
                                          ----------     -------       ---------      -------       ---------
                                               1,820       8,949          28,704          --           39,473
Depreciation and amortization                      7       5,221           5,248          --           10,476
                                          ----------     -------       ---------      -------       ---------
Operating income                              29,125      31,830          41,871      (48,139)         54,687
                                          ----------     -------       ---------      -------       ---------
Other income (deductions):
Interest income                                  735         305             377          --            1,417
Interest expense                              (8,234)        (44)           (191)         --           (8,469)
Financing costs                               (4,978)        --             --            --           (4,978)
Other, net                                       (39)        331              12          --              304
                                          ----------     -------       ---------      -------       ---------
          Total other income
             (deductions)                    (12,516)        592             198          --          (11,726)

Income before provision for income
   taxes and minority interest                16,609      32,422          42,069      (48,139)         42,961
Minority interest in consolidated
   income                                        --          --             --         24,790          24,790
Provision for income taxes                     5,815       1,470              92          --            7,377
                                          ----------     -------       ---------      -------       ---------
          Net income                      $   10,794     $30,952       $  41,977     $(72,929)      $  10,794 
                                          ==========     =======       =========     ========       ========= 

</TABLE>

                                      A-27
<PAGE>


                                                          

                 PRIME MEDICAL SERVICES, INC. AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
                   Condensed Consolidating Statement of Income

                                                    Year Ended December 31, 1997
($ in thousands)   
<TABLE>
<S>                                     <C>            <C>            <C>            <C>            <C>  

                                        Prime Medical   Guarantor     Non-Guarantor  Eliminating    Consolidated
                                        Services, Inc. Subsidiaries   Subsidiaries     Entries          Total



Fee revenue:
  Lithotripsy:
     Fee revenues                       $    --        $   20,863       $63,674      $     --       $   84,537
     Management fees                         --             3,978         2,259            --            6,237
     Equity income                         27,386          18,587           --         (43,634)          2,339
                                           27,386          43,428        65,933        (43,634)         93,113

  Manufacturing                               --              --          2,358            --            2,358
  Cardiac                                     --              479           --             --              479
  Other                                       --               29           --             --               29
                                          ----------      -------       --------       -------       ---------
          Total fee revenue                27,386          43,936        68,291        (43,634)         95,979

Costs of services and general and
     administrative expenses
       Lithotripsy                            --            4,646        20,735            --           25,381
       Manufacturing                          --              --          1,743            --            1,743
       Cardiac                                --              310           --             --              310
       Other                                  --              168           --             --              168
       Corporate                              567           5,116           --             --            5,683
                                          ----------      -------       --------       -------       ---------
                                              567          10,240        22,478            --           33,285
   Depreciation and amortization                7           5,157         4,747            --            9,911
                                          ----------      -------       --------       -------       ---------
          Total operating expenses            574          15,397        27,225            --           43,196
                                          ----------      -------       --------       -------       ---------
Operating income                           26,812          28,539        41,066        (43,634)         52,783
                                          ----------      -------       --------       -------       ---------    
Other income (deductions):
    Interest and dividends                    --              309           431            --              740
    Interest expense                       (7,160)            (52)         (265)           --           (7,477)
    Loan fees and stock offering costs       (360)            --             --            --             (360)
    Other, net                                --             (128)          134            --                6
                                          ----------      -------       --------       -------       --------- 
                                           (7,520)            129           300            --           (7,091)
Income before provision for income
   taxes and minority interest             19,292          28,668        41,366        (43,634)         45,692
Minority interest in consolidated
   income                                     --              --            --          25,041          25,041
Provision for income taxes                  4,436           1,282            77            --            5,795
                                          -------         -------       --------       -------       ---------
          Net income                    $  14,856      $   27,386     $  41,289      $ (68,675)     $   14,856
                                        =========      ==========     =========      =========      ==========
</TABLE>


                                      A-28
<PAGE>
                 PRIME MEDICAL SERVICES, INC. AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
                   Condensed Consolidating Statement of Income


                                                    Year Ended December 31, 1996

<TABLE>
<S>                                     <C>            <C>            <C>            <C>            <C>  
($ in thousands)
                                        Prime Medical   Guarantor     Non-Guarantor  Eliminating    Consolidated
                                        Services, Inc. Subsidiaries    Subsidiaries    Entries         Total
                                        -------------- -------------    ------------    -------         -----



Fee revenue:
  Lithotripsy:
     Fee revenues                       $     --       $   18,688     $  46,450      $      --      $   65,138
     Management fees                          --            3,180         1,518             --           4,698
     Equity income                         19,382          10,701           --          (28,317)         1,766
                                          -------         -------       --------       -------       ---------
                                           19,382          32,569        47,968         (28,317)        71,602
                                                                                                           
  Cardiac                                     --              802           --              --             802
                                          -------         -------       --------       -------       ---------
          Total fee revenue                19,382          33,371        47,968         (28,317)        72,404

Costs of services and general and
    administrative expenses
     Lithotripsy                              --            5,093        14,829             --          19,922
     Cardiac                                  --              632           --              --             632
     Corporate                                257           3,988           --              --           4,245
                                          -------         -------       --------       -------       ---------
                                              257           9,713        14,829             --          24,799

Depreciation and amortization                 127           3,537         4,758             --           8,422
                                          -------         -------       --------       -------       ---------
                 Total operating expenses     384          13,250        19,587             --          33,221
                                          -------         -------       --------       -------       ---------
Operating income                           18,998          20,121        28,381         (28,317)        39,183
                                          -------         -------       --------       -------       ---------
Other income (deductions):

   Interest and dividends                     --              202           257             --             459
   Interest expense                        (5,431)           (299)         (247)            --          (5,977)
   Loan fees and stock offering costs      (3,535)            --            --              --          (3,535)
   Other, net                                 --              207           163             --             370
                                          -------         -------       --------       -------       ---------
                                           (8,966)            110           173             --          (8,683)
 
Income before provision for income
   taxes and minority interest             10,032          20,231        28,554         (28,317)        30,500
Minority interest in consolidated
   income                                     --              --            --           19,543         19,543
Provision for income taxes                  1,071             849            76             --           1,996
                                          -------         -------       --------       -------       ---------
          Net income                    $   8,961      $   19,382     $  28,478      $  (47,860)    $    8,961
                                        =========      ==========     =========      ==========     ==========

</TABLE>


                                      A-29

<PAGE>





                  PRIME MEDICAL SERVICES, INC. AND SUBSIDIARIES
                      CONDENSED CONSOLIDATING BALANCE SHEET



($ in thousands)                                               December 31, 1998
<TABLE>
<S>                                     <C>            <C>            <C>            <C>            <C>  
                                        Prime Medical   Guarantor     Non-Guarantor  Eliminating    Consolidated
                                        Services, Inc. Subsidiaries   Subsidiaries      Entries        Total
                                        -------------- ------------   ------------      -------        -----





ASSETS:

Current Assets:
    Cash                                $   15,798     $   7,585      $  16,763      $     --       $   40,146
    Accounts receivable, net                   --          4,240         18,081            --           22,321
    Other receivables                          --          2,228            --             --            2,228
    Deferred income taxes                    1,603           727            --             --            2,330
    Prepaid expenses and 
       other current assets                    --            456          2,318            --            2,774
                                         ---------       -------       --------       --------       ---------
        Total current assets                17,401        15,236         37,162            --           69,799
                                         ---------       -------       --------       --------       ---------
Property and equipment:
    Equipment, furniture and fixtures          --          5,301         29,184            --           34,485
    Building and leasehold improvements        --            491          1,582            --            2,073
                                         ---------       -------       --------       --------       ---------
                                               --          5,792         30,766            --           36,558

Less accumulated depreciation 
  and amortization                             --         (4,485)       (13,986)           --          (18,471)
                                         ---------       -------       --------       --------       ---------
    Property and equipment, net                --          1,307         16,780            --           18,087
                                         ---------       -------       --------       --------       ---------
Investment in subsidiaries and other       178,611        24,003            --        (191,123)         11,491
investments
Goodwill, at cost, net of amortization         --        140,863            --             --          140,863
Other noncurrent assets                        105           488            286            --              879
                                         ---------       -------       --------       --------       ---------
    Total Assets                        $  196,117     $ 181,897      $  54,228      $(191,123)     $  241,119
                                        ==========     =========      =========      =========      ==========
                                         

LIABILITIES:

Current Liabilities:
    Current portion of long-term debt   $      --      $     --       $     890      $      --      $      890
    Accounts payable                         1,501         2,175          2,532             --           6,208
    Accrued expenses                         3,563         1,929         15,510             --          21,002
                                         ---------       -------       --------       --------       ---------
Total current liabilities                    5,064         4,104         18,932             --          28,100

Long-term debt, net of current portion     100,000           162            825             --         100,987
Deferred income taxes                        1,303         3,486            --              --           4,789
                                         ---------       -------       --------       --------       ---------
  Total liabilities                        106,367         7,752         19,757             --         133,876

Minority interest                              --            --             --           17,493         17,493

STOCKHOLDERS' EQUITY:

Common stock                                   194           --             --              --             194
Capital in excess of par value              87,380           --             --              --          87,380
Accumulated earnings                        18,615           --             --              --          18,615
Treasury stock                             (16,439)          --             --              --         (16,439)
Subsidiary net equity                          --        178,645         34,471        (213,116)           -- 
                                         ---------       -------       --------       --------       ---------
  Total stockholders' equity                89,750       178,645         34,471        (213,116)        89,750
                                         ---------       -------       --------       --------       ---------
  Total Liabilities and
     stockholders' equity               $  196,117     $ 186,397      $  54,228      $ (195,623)    $  241,119
                                        ==========     =========      =========      ==========     ==========

</TABLE>



                                                                A-31
<PAGE>


                  PRIME MEDICAL SERVICES, INC. AND SUBSIDIARIES
                      CONDENSED CONSOLIDATING BALANCE SHEET

($ in thousands)                                               December 31, 1997
<TABLE>
<S>                                     <C>            <C>            <C>            <C>            <C>  

                                        Prime Medical   Guarantor     Non-Guarantor  Eliminating    Consolidated 
                                        Services, Inc. Subsidiaries   Subsidiaries    Entries          Total
                                        -------------- ------------   ------------    -------          -----





ASSETS:

Current Assets:
    Cash                                $       18     $     6,260    $  17,492      $     --       $   23,770
    Accounts receivable, net                   --            4,564       14,823            --           19,387
    Other receivables                          291             578          234            --            1,103
    Deferred income taxes                      779             727          --             --            1,506
    Prepaid expenses and 
      other current assets                      24           1,098          654            --            1,776
                                         ---------         -------      -------       --------       ---------
        Total current assets                 1,112          13,227       33,203            --           47,542
                                         ---------         -------      -------       --------       ---------
Property and equipment:
    Equipment, furniture and fixtures          --            5,970       26,703            --           32,673
    Leasehold improvements                     --              515           16            --              531
                                         ---------         -------      -------       --------       ---------
                                               --            6,485       26,719            --           33,204

Less accumulated depreciation 
     and amortization                          --           (4,646)      (8,851)           --          (13,497)
                                         ---------         -------      -------       --------       ---------
    Property and equipment, net                --            1,839       17,868            --           19,707
                                         ---------         -------      -------       --------       ---------
Investment in subsidiaries and other       175,082          24,376          --        (187,153)         12,305
investments
Goodwill, at cost, net of amortization         --          143,790           33            --          143,823
Other noncurrent assets                        344           1,721          384            --            2,449
                                         ---------         -------      -------       --------       ---------
    Total Assets                        $  176,538     $   184,953    $  51,488      $(187,153)     $  225,826
                                        ==========     ===========    =========      =========      ==========


LIABILITIES:

Current Liabilities:
    Current portion of long-term debt   $    9,800     $         6    $   1,332      $     --       $   11,138
    Accounts payable                           --            3,439        1,947            --            5,386
    Accrued expenses                         3,367           2,563       14,929            --           20,85
                                         ---------         -------      -------       --------       ---------
Total current liabilities                   13,167           6,008       18,208            --           37,383
                                         ---------         -------      -------       --------       ---------
Long-term debt, net of current portion      69,200             161        1,837            --           71,198
Deferred income taxes                        2,107           3,702           --            --            5,809
                                         ---------         -------      -------       --------       ---------
  Total liabilities                         84,474           9,871       20,045            --          114,390
                                         ---------         -------      -------       --------       ---------
Minority interest                              --              --           --          19,372          19,372


STOCKHOLDERS' EQUITY:

Common stock                                   193             --           --             --              193
Capital in excess of par value              84,050             --           --             --           84,050
Accumulated earnings                         7,821             --           --             --            7,821
Subsidiary net equity                          --          175,082       31,443       (206,525)            -- 
                                         ---------         -------      -------       --------       ---------
  Total stockholders' equity                92,064         175,082       31,443       (206,525)         92,064
                                         ---------         -------      -------       --------       ---------
  Total Liabilities and 
     stockholders' equity               $  176,538     $   184,953    $  51,488     $ (187,153)     $  225,826
                                        ==========     ===========    =========     ==========      ==========


</TABLE>



                                                                A-32
<PAGE>








                  PRIME MEDICAL SERVICES, INC. AND SUBSIDIARIES
                 CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS








($ in thousands)                                   Year Ended December 31, 1998
<TABLE>
<S>                                     <C>            <C>            <C>            <C>            <C>  
                                        Prime Medical   Guarantor     Non-Guarantor  Eliminating    Consolidated
                                        Services, Inc. Subsidiaries    Subsidiaries    Entries          Total
                                        -------------- ------------    ------------    -------          -----


          CASH FLOWS FROM OPERATING
                 ACTIVITIES:

     Net cash provided by (used in)
        operating activities            $ (10,215)     $   9,608      $  46,158      $      --      $   45,551
                                                          
CASH FLOWS FROM INVESTING
    ACTIVITIES:
Purchases of equipment and leasehold                                                             
   improvements                               --          (2,000)        (3,213)            --          (5,213)
Proceeds from sales of equipment              --             179             45             --             224
Distributions from subsidiaries            26,228         16,665            --          (42,893)           --
Investments                                   408          2,940            --              --           2,532
Other                                          22            166            127             --             315
                                         ---------       -------        -------        --------       ---------
     Net cash provided by (used in)
        investing activities               25,842         17,950         (3,041)        (42,893)        (2,142)
                                         ---------       -------        -------        --------       ---------
CASH FLOWS FROM FINANCING
   ACTIVITIES:
Payments on notes payable exclusive of                                                           
       interest                           (79,000)           (5)         (1,479)            --         (80,484)
Borrowings on notes payable               100,000           --               25             --         100,025
Distributions to minority interest            --            --              --          (25,799)       (25,799)
Debt issuance costs                        (4,417)          --              --              --          (4,417)
Contributions by minority interest            --            --               72             --              72
Exercise of stock options                       9           --              --              --               9
Distributions to equity owners                --        (26,228)        (42,464)         68,692            --
                                         ---------         -------      -------       --------       ---------
     Net cash provided by (used in)
        financing activities                  153       (26,233)        (43,846)         42,893        (27,033)
                                         ---------       -------        -------        --------       ---------
NET INCREASE (DECREASE) IN CASH                                                                  
   AND CASH EQUIVALENTS                    15,780         1,325            (729)            --          16,376

Cash and cash equivalents, beginning                                                             
   of period                                   18         6,260          17,492             --          23,770
                                         ---------       -------        -------        --------       ---------
Cash and cash equivalents, end of                                                                
   period                               $  15,798      $  7,585       $  16,763      $      --      $   40,146
                                        =========      ========       =========      ==========     ==========

</TABLE>


                                                                A-33
<PAGE>

                  PRIME MEDICAL SERVICES, INC. AND SUBSIDIARIES
                 CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS


($ in thousands)                                    Year Ended December 31, 1997
<TABLE>
<S>                                     <C>            <C>            <C>            <C>            <C>  
                                        Prime Medical   Guarantor     Non-Guarantor  Eliminating    Consolidated
                                        Services, Inc. Subsidiaries   Subsidiaries     Entries          Total
                                        ---------------------------   ------------     -------          -----


          CASH FLOWS FROM OPERATING
                 ACTIVITIES:

     Net cash provided by (used in)
        operating activities            $    (9,441)   $  14,879      $  46,255      $      --      $   51,693
                                                                      
CASH FLOWS FROM INVESTING
    ACTIVITIES:
Purchase of lithotripter entities               --       (20,217)           --              --         (20,217)
Purchases of equipment and leasehold                                                             
   improvements                                 --        (1,516)        (3,030)            --          (4,546)
Proceeds from sales of equipment                --            30            --              --              30
Distributions from subsidiaries               6,865       16,667            --          (23,532)           --
Investments                                     --         1,690            --              --           1,690
Other                                           --            94            --              --              94
     Net cash provided by (used in)
        investing activities                  6,885       (3,252)        (3,030)        (23,532)       (22,949)

CASH FLOWS FROM FINANCING
   ACTIVITIES:
Payments on notes payable exclusive of                                                           
       interest                             (47,750)      (1,100)        (1,478)            --         (50,328)
Borrowings on notes payable                  50,000          --           1,201             --          51,201
Distributions to minority interest              --           --             --          (28,667)       (28,667)
Contributions by minority interest              --           --           2,381             --           2,381
Exercise of stock options                       343          --              --             --             343
Distributions to equity owners                  --        (6,865)       (45,334)         52,199            --

     Net cash provided by (used in)
        financing activities                  2,593       (7,965)       (43,230)         23,532        (25,070)

NET INCREASE (DECREASE) IN CASH                                                                  
   AND CASH EQUIVALENTS                          17        3,662             (5)            --           3,674

Cash and cash equivalents, beginning                                                             
   of period                                      1        2,598         17,497             --          20,096

Cash and cash equivalents, end of                                                                
   period                               $        18    $   6,260      $  17,492      $      --      $   23,770
                                        ===========    =========      =========      ==========     ==========
</TABLE>


                                                                A-34
<PAGE>


                  PRIME MEDICAL SERVICES, INC. AND SUBSIDIARIES
                 CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS


 


($ in thousands)

                                                    Year Ended December 31, 1996
<TABLE>
<S>                                     <C>            <C>            <C>            <C>            <C>  
                                        Prime Medical   Guarantor     Non-Guarantor  Eliminating    Consolidated
                                        Services, Inc. Subsidiaries   Subsidiaries     Entries         Total
                                        -------------- ------------   ------------     -------         -----

CASH FLOWS FROM OPERATING
      ACTIVITIES:

     Net cash provided by (used in) 
       operating activities             $   (4,310)    $   7,912      $  40,735      $      --      $   44,337
                                                                   
 CASH FLOWS FROM INVESTING
      ACTIVITIES:
     Purchase of lithotripter entities         --        (66,742)           --              --         (66,742)
     Purchases of equipment and leasehold
      improvements                             --         (1,131)        (1,395)            --          (2,526)
     Deferred payments on lithotripter
       entities                                --         (3,387)           --              --          (3,387)
     Proceeds from sales of equipment          --            --               6             --               6
     Contributions to subsidiaries         (57,510)          --             --           57,510            --
     Distributions from subsidiaries           --          7,180            --           (7,180)           --
     Investments                               --          1,257            --              --           1,257
     Other                                     --           (378)           --              --            (378)
     Net cash provided by (used in)
       investing activities                (57,510)      (63,201)        (1,389)         50,330        (71,770)

CASH FLOWS FROM FINANCING
ACTIVITIES:
   Payments on notes payable exclusive
         of interest                       (12,300)       (1,515)        (1,536)            --         (15,351)
   Borrowings on notes payable              74,000           --             --              --          74,000
   Distributions to minority interest          --            --             --          (13,440)       (13,440)
   Contributions from parent                   --         57,510            --          (57,510)           --
   Debt issuance costs                      (2,735)          --             --              --          (2,735)
   Exercise of stock options                   363           --             --              --             363
   Distributions to equity owners              --            --         (20,620)         20,620            --
     Net cash provided by (used in)
       financing activities                 59,328        55,995        (22,156)        (50,330)        42,837

NET INCREASE (DECREASE) IN CASH                                                                  
 AND CASH EQUIVALENTS                       (2,492)          706         17,190             --          15,404
Cash and cash equivalents, beginning                                                             
   of period                                 2,493         1,892            307             --           4,692
Cash and cash equivalents, end of                                                                
   period                               $        1     $   2,598      $  17,497      $      --      $   20,096
                                        ==========     =========      =========      =========      ==========

</TABLE>

                                                                A-35
<PAGE>


________________________
Name of Prospective Assignee







                       PACIFIC MEDICAL LIMITED PARTNERSHIP

              A Limited Partnership Formed Under the Laws of Hawaii


                         CONFIDENTIAL ASSIGNMENT SUMMARY


                           Sale by Lithotripters, Inc.
                                       of
                     6 Units of Limited Partnership Interest



        THIS SUMMARY IS PROVIDED TO THE PROSPECTIVE ASSIGNEE WHOSE NAME
       APPEARS ABOVE SUBJECT TO THE TERMS OF A CONFIDENTIALITY AGREEMENT
       WHICH PROHIBITS DISTRIBUTION OF THIS MEMORANDUM BY SUCH PERSON TO
       ANYONE OTHER THAN PERSONS RETAINED BY HIM OR IT TO PROVIDE ADVICE
                 WITH RESPECT TO THE MATTERS HEREIN ADDRESSED.




                            MEDTECH INVESTMENTS, INC.
                              Exclusive Sales Agent
                                2008 Litho Place
                       Fayetteville, North Carolina 28304
                                 1-800-682-7971

 
<PAGE>

                    The Date of this Summary is July 13, 1998


                  SUMMARY OF ASSIGNMENT OF LIMITED PARTNERSHIP
                INTERESTS OF PACIFIC MEDICAL LIMITED PARTNERSHIP


          Lithotripters,  Inc. ("Litho"), a North Carolina corporation,  and the
          general  partner  of Pacific  Medical  Limited  Partnership,  a Hawaii
          limited  partnership (the  "Partnership"),  hereby offers for sale and
          assignment  on the  terms set forth  herein,  a maximum  of 6 units of
          limited   partnership   interest   (collectively,   the   "Partnership
          Interests")  in the  Partnership  issued  to and held by  Litho.  Each
          Partnership   Interest  represents  a  1%  economic  interest  in  the
          Partnership,  and the Partnership Interests are offered for assignment
          at a price per  Partnership  Interest  of $5,000  in cash  payable  to
          Litho, plus a personal guaranty of 1% of the Partnership's obligations
          under the loan of up to  $1,652,014  from First  Citizens Bank & Trust
          Company (the "Loan") (up to a $16,520.14 principal guaranty obligation
          per 1% Partnership  Interest).  Prospective assignees who meet certain
          requirements may be able to fund all or a portion of their Partnership
          Interest  purchase  price with the  proceeds  of  certain  third-party
          financing.  See "The  Offering - Limited  Partner  Loans"  below.  The
          Partnership   owns  and  operates  a  Lithostar   second   generation
          extracorporeal  shock-wave  lithotripter for the lithotripsy of kidney
          stones housed in a self-propelled mobile coach servicing the island of
          Oahu, Hawaii.

          As the Partnership  Interests being offered are owned by Litho,  Litho
          (not the Partnership)  will receive any proceeds from the sale of such
          Partnership Interests.  Partnership Interests may only be purchased by
          persons meeting certain suitability  standards as provided herein. See
          "Terms of the Offering - Suitability  Standards." An investment in the
          Partnership Interests is a long-term investment and should not be made
          by persons who need liquidity in their investments.

          THE PARTNERSHIP  INTERESTS ARE BEING OFFERED  PURSUANT TO AN EXEMPTION
          FROM THE  REGISTRATION  REQUIREMENTS OF THE SECURITIES ACT OF 1933, AS
          AMENDED,   AND  APPLICABLE   STATE  SECURITIES  LAWS.  A  REGISTRATION
          STATEMENT  RELATING  TO THESE  SECURITIES  HAS NOT BEEN FILED WITH ANY
          STATE   SECURITIES   AGENCY  OR  WITH  THE   SECURITIES  AND  EXCHANGE
          COMMISSION. ______________

          NEITHER  THE  SECURITIES   AND  EXCHANGE   COMMISSION  NOR  ANY  STATE
          REGULATORY   BODY  HAS  PASSED  UPON  THE  VALUE  OF  THE  PARTNERSHIP
          INTERESTS, MADE ANY RECOMMENDATIONS AS TO THEIR PURCHASE,  APPROVED OR
          DISAPPROVED  THE SALE, OR PASSED UPON THE ADEQUACY OR ACCURACY OF THIS
          SUMMARY.   ANY   REPRESENTATION   TO   THE   CONTRARY   IS   UNLAWFUL.
          ______________

 

                                        2
<PAGE>

          THE   PARTNERSHIP   INTERESTS   ARE   SUBJECT   TO   RESTRICTIONS   ON
          TRANSFERABILITY AND RESALE AND MAY NOT BE TRANSFERRED OR RESOLD EXCEPT
          AS PERMITTED  UNDER THE  SECURITIES  ACT OF 1933, AS AMENDED,  AND THE
          APPLICABLE  STATE   SECURITIES  LAWS,   PURSUANT  TO  REGISTRATION  OR
          EXEMPTION THEREFROM.  NO PUBLIC OR OTHER MARKET EXISTS OR WILL DEVELOP
          FOR  THE  PARTNERSHIP   INTERESTS.   PARTNERSHIP   INTERESTS  ARE  NOT
          TRANSFERABLE   WITHOUT  THE   CONSENT  OF  THE  GENERAL   PARTNER  AND
          SATISFACTION OF CERTAIN OTHER CONDITIONS INCLUDING THE AVAILABILITY OF
          AN  EXEMPTION  UNDER  THE  SECURITIES  ACT OF 1933 AND  VARIOUS  STATE
          SECURITIES LAWS.  INVESTORS SHOULD PROCEED ONLY ON THE ASSUMPTION THAT
          THEY  MAY  HAVE TO BEAR  THE  ECONOMIC  RISK OF AN  INVESTMENT  IN THE
          PARTNERSHIP INTERESTS FOR AN INDEFINITE PERIOD OF TIME.
                                                  _______________


            OFFERING MEMORANDUM AND CERTAIN SUPPLEMENTAL INFORMATION

          The sole purpose of this summary (the  "Summary")  is to set forth the
          terms and  conditions of the sale and  assignment  of the  Partnership
          Interests  in the  Partnership  by Litho,  and to provide  information
          concerning the Partnership's  operations since the closing on April 1,
          1996 of the  Partnership's  initial  offering  of limited  partnership
          interests (the "Offering").  The terms of the  Partnership's  Offering
          and a  description  of its business and the risks  associated  with an
          investment  in the  Partnership  are set  forth  in the  Partnership's
          Confidential  Private Placement  Memorandum dated January 8,  1996, as
          amended and as supplemented (the  "Memorandum"),  and are incorporated
          herein  by  reference.  A copy  of  the  Memorandum  accompanies  this
          Summary.  Prospective assignees are also urged to review carefully the
          Partnership's  Agreement of Limited Partnership included as Appendix B
          to the Memorandum (the  "Partnership  Agreement").  Capitalized  terms
          used herein and not  otherwise  defined  shall have the  meanings  set
          forth in the Memorandum.

             IN MAKING AN INVESTMENT DECISION, PROSPECTIVE ASSIGNEES
      MUST RELY ON THEIR OWN EXAMINATION OF THE PARTNERSHIP, ITS BUSINESS
           AND OPERATIONS. PROSPECTIVE ASSIGNEES SHOULD NOTE THAT AN
      INVESTMENT IN THE PARTNERSHIP INTERESTS IS SUBJECT TO CERTAIN RISKS.
                     SEE "RISK FACTORS" IN THE MEMORANDUM.

          Between January 8, 1996 and the closing of the Offering, certain terms
          of the Offering changed as reflected in supplements to the Memorandum,
          copies  of  which  are  herewith  provided  and  should  be  carefully
          reviewed.  In summary,  the First  Supplement dated February 23, 1996,
          provided  the   following   clarifications   and   amendments  to  the
          Memorandum:

          (i) Professional  Liability  Insurance -- Prior to beginning  business
          operations,  the Partnership agreed to acquire professional  liability
          insurance covering
 

                                                         3
<PAGE>

          itself  and its  employees  in an  amount  of  $3,000,000  per  claim,
          $5,000,000  in the  aggregate.  Such  insurance is in effect as of the
          date of this Summary.

          (ii)  Lithostar  Service  Contract -- The Siemens bid of $120,000 per
          year for the  Lithostar  maintenance  contract  was  accepted  by the
          Partnership.  Under the Siemens contract,  most maintenance during the
          first year of operation is covered by a warranty. Service expenditures
          in the  initial  year are  expected  to be  limited  to the  estimated
          $10,000 cost of shock tube  replacements  which are not covered by the
          manufacturer's warranty.

          (iii)  Management Fee -- The Memorandum  disclosed that Litho,  in its
          capacity as the management agent of the  Partnership,  would receive a
          management fee from the Partnership equal to the greater of $8,000 per
          month or 7.5% of Partnership net cash flow per month.  Litho agreed to
          accept a management fee of 7.5% of Partnership net cash flow per month
          with no guaranteed minimum amount.

          (iv) Partnership Books, Billings and Collection -- Except as otherwise
          required by federal rules and regulations regarding government program
          patients,  the Partnership  ordinarily would maintain clinic books and
          records, and provide all billing and collection services.

          (v)  Noncompetition - Litho and its Affiliates agreed that, during the
          life of the  Partnership,  they  would  not own,  operate  or manage a
          competing lithotripsy business on the islands of Hawaii.

          (vi) Service  Area -- The  Partnership's  mobile  service area will be
          limited to the island of Oahu.

          (vii) Extension of Offering  Termination  Date -- The First Supplement
          extended the original offering termination date from February 23, 1996
          to March 16, 1996.

          The Second  Supplement  dated  March 15,  1996  further  extended  the
          offering termination date to April 1, 1996. The Third Supplement dated
          April 1, 1996 closed the Offering effective at 5:00 p.m., Hawaii time,
          April 1, 1996. Subsequent to the closing of the Offering, and pursuant
          to the terms of the Memorandum,  the Partnership  continued to solicit
          subscriptions  for  unsold  Units  until  April  15,  1996.  See  "The
          Partnership - Closing of the Partnership's Offering" below.

          Effective  April 26,  1996, the former shareholders of Litho listed in
          the  Memorandum  sold all of  their  shares  of  Litho  stock to Prime
          Medical Services,  Inc., a Delaware corporation  ("Prime").  Since the
          date of the sale,  Litho's management has undergone certain changes as
          discussed in more detail below. See "The Partnership - Management".

 

                                                         4
<PAGE>

          Following  the  Closing,   the  Partnership  also  negotiated  certain
          modifications  to the terms of the Loan. See "Sources and Applications
          of Funds" below.

                                 THE PARTNERSHIP

          The  Partnership  was organized  and created under the Hawaii  Uniform
          Limited  Partnership  Act, as amended,  on December 14, 1995. Litho is
          the  general   partner  of  the  Partnership  and  is  a  wholly-owned
          subsidiary of Prime.  Litho currently holds a 20% economic interest in
          the  Partnership  in its  capacity  as the  general  partner,  and the
          existing limited  partners,  including Litho,  collectively,  hold the
          remaining  80%  economic  interest  in the  form  of  limited  partner
          interests in the  Partnership.  Litho holds an  aggregate  21% limited
          partner interest in the Partnership, and affiliates of Prime and Litho
          hold an aggregate 4% limited partner interest in the  Partnership.  In
          the event all the Partnership  Interests  hereby offered are assigned,
          Litho will continue to own a 15% limited  partnership  interest in the
          Partnership.  The principal  address of the  Partnership  and Litho is
          2008 Litho Place,  Fayetteville,  North Carolina 28304.  The telephone
          number of the Partnership and Litho is (800) 682-7971.

Closing of the Partnership's Offering

          The  Offering  initially  closed  on April  1,  1996,  with  continued
          solicitation   activity   through   April 15,   1998.  In  total,  the
          Partnership  sold 80  units  of  limited  partnership  interest  to 35
          investors  (including  Litho and its  Affiliates) for $190,750 in cash
          and $1,321,611.20 in guarantees of Partnership  principal  obligations
          under the Loan (up to  $1,652,014).  Because the  Partnership  had not
          received  its  CON as of  the  closing,  the  subscription  funds  and
          guarantees of the Limited Partners  remained in escrow with the Escrow
          Agent in accordance with the terms of the Offering  pending receipt of
          the CON. See  "Regulation - State Issues" and "Terms of the Offering -
          Extended Escrow" in the Memorandum.

Partnership Operations

          Following the grant of a CON to the  Partnership  in March,  1997, the
          Partnership  notified the Escrow Agent and the  subscription  funds of
          the  Limited  Partners  and the Loan  proceeds  were  released  to the
          Partnership. The Partnership's Lithostar was acquired from Siemens in
          September,  1997 and is covered  by a  manufacturer's  warranty  until
          September 4, 1998 for most repairs and maintenance.  The Partnership's
          Lithostar is housed in a mobile coach  manufactured by AK Associates,
          Inc., an Affiliate of Litho (the "AK Coach"). In Litho's opinion,  the
          AK Coach is better suited for the Partnership's mobile operations than
          the Calumet  Coach  originally  anticipated  to be  purchased  for the
          Lithostar.  The AK Coach is 40' long,  8' wide and 13' 6" high. It is
          equipped with complete HVAC and a humidifying  system. The AK Coach is
          fully wired and includes full lighting  with  emergency  battery power
          lighting.  Four hydraulic stabilizing stands are provided, one at each
          corner of the unit, to level the AK Coach at each treatment  site. The
          AK Coach includes a
 

                                                         5
<PAGE>

          2,000 pound  capacity  patient lift platform and is warranted  against
          certain defects for a period of one year from the date of purchase.

          The  Partnership's  lithotripsy  operations  commenced on September 5,
          1997.  The  Partnership  is now a  party  to  contracts  with  several
          hospitals  for the  provision of  lithotripsy  services in the Service
          Area,  including  Castle Medical  Center and Wahiwa  General  Hospital
          pursuant  to which the  Partnership  is  responsible  for  billing and
          collecting  from private  insurance  payors and the hospitals bill and
          collect from  government  program  payors.  The  contract  with Castle
          Medical  Center  is  presently  being   renegotiated  to  convert  the
          agreement from a services  arrangement to a lease arrangement pursuant
          to which the Partnership  would lease the Lithostar  Mobile System to
          the hospital for a fixed monthly rental fee.

          The  Partnership  also has entered into  agreements  with St.  Francis
          Medical Center and St. Francis-West  pursuant to which the Partnership
          receives  a  portion  of the  per  procedure  treatment  fee  and  the
          hospitals  are   responsible  for  billing  and  collecting  from  all
          insurance  program payors.  The Partnership and Kaiser  Permanente are
          also presently  negotiating a services  agreement and the  Partnership
          has already began lithotripsy  operations at Kaiser under the terms of
          a  letter  of  intent  providing  for per  procedure  payments  to the
          Partnership.

          The contract terms are primarily for one year and renew  automatically
          for successive  periods unless  terminated by either party.  Insurance
          contracts  with the major  payors  covering the Service Area have been
          completed  with a per case  treatment fee payable to the  Partnership.
          The treatment fees vary from insurance  company to insurance  company,
          and the General Partner has agreed on behalf of the Partnership to the
          rates in each contract.

                                   MANAGEMENT

          Since the original date of the Memorandum,  the former shareholders of
          Litho listed in the Memorandum sold all of their shares of Litho stock
          to Prime. Prime is the largest provider of lithotripsy services in the
          United  States  and owns  interests  in  and/or  manages a total of 62
          lithotripters,  of which 55 are  mobile  and  seven  are  fixed  site.
          Prime's  lithotripters  performed  approximately  20% of the estimated
          180,000 lithotripsy  procedures in the United States in 1997. Prime is
          a public  company  listed on  NASDAQ  and is the sole  shareholder  of
          Litho.  Certain  changes have occurred in Litho's  management from the
          description  in the  Memorandum.  See  "The  General  Partner"  in the
          Memorandum.  Dr.  Jenkins  remains a Director and is the President and
          Chief Executive  Officer of Litho. He also serves as Prime's President
          and Chief Executive Officer and is a member of its Board of Directors.
          Other  senior  management  positions  at Litho are  currently  held as
          follows:

         Name                                        Offices Held

         Kenneth S. Shifrin                          Director
         Cheryl L. Williams                          Vice President and Director
         Philip J. Gallina                           Secretary and Treasurer

 

                                                         6
<PAGE>


          The Memorandum  discusses the  credentials  of all current  members of
          Litho's senior  management  team except Mr. Shifrin and Ms.  Williams.
          Mr.  Shifrin is a Director and Chairman of Prime's  Board of Directors
          and is the Chairman and Chief Executive Officer of American Physicians
          Service Group,  Inc.  ("APS") with whom he has held several  positions
          since February 1985.  Ms.  Williams has held financial  positions with
          APS Systems,  Inc. (a  wholly-owned  subsidiary  of APS) and Fairchild
          Aircraft  Corporation  and  presently  also  serves as  Prime's  Chief
          Financial Officer, Vice President-Finance and Secretary.


                               REGULATORY UPDATES

Federal Issues

     Health  facilities, such as the Partnership, which seek  reimbursement  for
     services  covered by Medicare or Medicaid  (collectively,  the  "Government
     Programs")  are subject to federal  regulation.  As noted in the Memorandum
     (See "Regulation - Federal Issues" in the Memorandum),  Congress has passed
     legislation  prohibiting provider self-referral of patients for "designated
     health services," which include inpatient and outpatient  hospital services
     (42 U.S.C.  Section 1395nn (Supp.  1994)) ("Stark II").  Subject to certain
     exceptions,  Stark II provides that if a physician (or a family member of a
     physician) has a financial  relationship with an entity:  (i) the physician
     may not make a  referral  to the entity for the  furnishing  of  designated
     health services  reimbursable under the Government  Programs;  and (ii) the
     entity may not bill Government Programs,  any individual or any third-party
     payor for designated  health  services  furnished  pursuant to a prohibited
     referral.  The  prohibitions  of Stark II only  apply to the  treatment  of
     Government Program patients,  and have no application to services performed
     for non-government program patients.  Entities and physicians committing an
     act in violation of Stark II are  required to refund  amounts  collected in
     violation of the statute and also are subject to civil  monetary  penalties
     and exclusion from the Government Programs.

          As discussed  in the  Memorandum,  on October 19,  1995,  the House of
          Representatives  passed H.R. 2425, titled "An Act to amend Title XVIII
          of the  Social  Security  Act to  preserve  and  reform  the  Medicare
          program." Section 15202 of that act attempted to revise the definition
          of "designated  health  services"  subject to Stark II prohibitions to
          exclude  inpatient  and  outpatient  hospital  services.  However,  on
          December 6, 1995 H.R. 2425 (which was ultimately incorporated into the
          Seven Year Budget  Reconciliation Act of 1995 (H.R. 2491)), was vetoed
          by President Clinton resulting in no substantive changes to Stark II.

          Currently,  the Government  Programs only reimburse for lithotripsy if
          the  service is  provided  through a  hospital.  Accordingly,  in most
          cases,  lithotripsy  services provided by the Partnership are provided
          "under  arrangements"  with hospitals,  whereby the treatment services
          are billed by the contracting hospitals in their names and under their
          Government Program provider numbers.

 

                                                         7
<PAGE>

          Many key terms in Stark II are not adequately  defined and the statute
          is silent regarding its application to health care providers,  such as
          the Partnership,  contracting "under  arrangements" with hospitals for
          the provision of outpatient services such as lithotripsy. In the past,
          Litho has  interpreted  Stark II consistent  with the informal view of
          the General  Counsel for the United  States  Department  of Health and
          Human  Services,  and concluded  that the statute did not apply to the
          Partnership's method of conducting  business.  Based upon a reasonable
          interpretation  of Stark II, by  referring  a  patient  to a  hospital
          furnishing the outpatient  lithotripsy  services "under  arrangements"
          with the Partnership,  a physician  investor in the Partnership is not
          making a referral to an entity (the hospital) in which he or she has a
          financial relationship.

          On January 9, 1998, the Health Care Financing Administration ("HCFA"),
          the federal agency responsible for administering the Medicare program,
          published proposed regulations designed to clarify certain ambiguities
          and  define  certain  terms  of  Stark  II  (the  "Proposed  Stark  II
          Regulations").   The  Proposed   Stark  II   Regulations   and  HCFA's
          accompanying  commentary apply the physician referral  prohibitions of
          Stark II to the Partnership's  present practice of contracting  "under
          arrangements"  with  hospitals for treatment and billing of Government
          Program patients. Under this interpretation, physician Limited Partner
          referrals of  Government  Program  patients to  contracting  hospitals
          would be prohibited.

          At the present  time the  regulations  are only  proposed and HCFA has
          solicited  public  comments on the  regulations.  Litho cannot predict
          when final  regulations  will be issued or the  substance of the final
          regulations,  but the interpretive provisions of the Proposed Stark II
          Regulations may be viewed as HCFA's interim enforcement position until
          final regulations are issued.  Litho will continue to work through the
          American   Lithotripsy   Association  to  encourage  the  adoption  of
          legislation  supportive of  urologists'  ability to lawfully  maintain
          ownership interests in ventures that provide  lithotripsy  services to
          all of their patients.  Additionally, Litho will continue to carefully
          review  the  Proposed  Stark  II  Regulations  and  accompanying  HCFA
          commentary,  and explore other  alternative  plans of operations  that
          would allow the Partnership to operate in compliance with Stark II and
          its final regulations.

          In the event  Litho is unable to devise a plan  pursuant  to which the
          Partnership  may  operate  in  compliance  with Stark II and its final
          regulations, Litho is obligated under the Partnership Agreement either
          (i) to purchase (or cause the sale of ) the  Partnership  Interests of
          all the Limited  Partners at their  Capital  Account  values,  or (ii)
          dissolve  and   liquidate  the   Partnership.   See  "Summary  of  the
          Partnership   Agreement  -  Optional   Purchase  of  Limited   Partner
          Interests"  in the  Memorandum.  Furthermore,  as noted above,  HCFA's
          adoption of the current  Proposed  Stark II  Regulations as final will
          mean that the  Partnership and its physician  Limited  Partners are in
          violation of Stark II. In such instance,  the  Partnership  and/or the
          physician  Limited  Partners  may be  required  to refund any  amounts
          collected  from  Government  Program  patients  in  violation  of  the
          statute,  and may be subject to potential civil monetary penalties and
          possible exclusion from the Government Programs.


 

                                                         8
<PAGE>

          In any event,  prospective  assignees should consider that whenever an
          additional  offering  of  ownership  interests  is made  available  to
          persons with the potential to refer patients for services,  there is a
          possibility that HCFA may question whether the ownership interests are
          being  provided in exchange for potential  referrals by the new owners
          or for a legitimate business reason.  Remuneration,  which can include
          the provision of an ownership interest in a facility to which a person
          would refer  patients for services,  may constitute a violation of the
          federal fraud and abuse statute  (Section 1128B of the Social Security
          Act).  Whether  the  offering of  ownership  interests  to  additional
          investors who may refer patients to the Partnership might constitute a
          violation of this  legislation  must be  determined in each case based
          upon the specific facts involved.  The various  mechanisms in place to
          avoid providing a financial  benefit to prospective  purchasers of the
          Partnership Interests for any referrals of patients, and the existence
          in Litho's view of valid  business  reasons to assign the  Partnership
          Interests  unrelated to the  prospective  assignee's  ability to refer
          patients,  form the basis of Litho's position that this offering is in
          compliance  with  legal  requirements;  however,  HCFA  has  not  been
          requested  to  review  this  offering  (or  offerings  of this type to
          additional  investors)  to  determine  whether it agrees with  Litho's
          position  in  this  regard.   Thus,   federal  and  state   regulatory
          authorities  may  interpret  this  offering  as a means  to  illegally
          influence the referral  patterns of the  prospective  assignees of the
          Partnership   Interests.   Because   there  is  no   legal   precedent
          interpreting  circumstances similar to these facts, it is not possible
          to predict with certainty how this issue may be resolved if litigated.

                        SOURCES AND APPLICATIONS OF FUNDS

          The  following  table sets forth the  sources of the  available  funds
          after the  closing of the  Offering  in April 1, 1996 and their use by
          the  Partnership  through  the  date  of  start-up  of  operations  in
          September 1997:


Sources of Funds
Limited Partners Contribution (1)        190,750                        (11.29%)
General Partner Contribution (1)          47,688                        ( 2.82%)
Loan (2)                               1,451,816                        (85.89%)
         TOTAL SOURCES                $1,690,254                       (100.00%)
Application of Funds
Lithostar (2)                            850,000                        (50.29%)
Coach (2)                                290,373                        (17.18%)
Hawaii Use Tax (2)                        46,224                        ( 2.73%)
Shipping (2)                              15,219                       (   .90%)
Organizational and Start-up Costs(3)      40,000                       (  2.37%)
Syndication Costs (4)                     31,610                        ( 1.87%)
Working Capital and Reserve (5)          416,828                        (24.66%)

         TOTAL APPLICATIONS           $1,690,254                       (100.00%)


 
                                                         9
<PAGE>

Notes to Sources and Applications of Funds Table

          (1) Represents the actual cash proceeds from the Partnership's initial
          Offering.

          (2) The  Partnership  used the Loan proceeds to acquire the Lithostar
          ($850,000),  the AK Coach (including federal excise  taxes)($290,373),
          to pay the actual  Hawaii  use tax on the AK Coach and the  Lithostar
          ($46,224)  and to ship  the AK  Coach  and the  Lithostar  to  Hawaii
          ($15,219).  The purchase prices listed for the Lithostar and AK Coach
          differ from the prices listed for the equipment in the Memorandum. The
          differences in the prices reflects  discounts on the Lithostar and AK
          Coach negotiated by Litho and made available to the  Partnership.  The
          Partnership  has since  made a draw of  $24,525  against  the  working
          capital line provided by the Bank. See Note 5 below.

          (3) This amount includes the (i) legal and accounting costs associated
          with organizing the Partnership,  preparing the Partnership Agreement,
          the Management  Agreement and other ancillary  Partnership  documents,
          (ii) management  fees paid to Litho prior to the  commencement  of the
          Partnership's operations and (iii) all out-of-pocket expenses incurred
          by the General Partner and its Affiliates  associated with the initial
          start-up of the Partnership's operations.

          (4) Includes commissions paid to the Sales Agent, reimbursement to the
          Sales Agent for out-of- pocket expenses  incurred in selling the Units
          in the Offering and legal and  accounting  costs  associated  with the
          preparation of the Memorandum.

          (5) The  Partnership  has  extended  the term of the  credit  line and
          interest only payment  period under the Loan until August 25, 1998, at
          which  time  payments  will be due in  accordance  with  the 42  month
          schedule  outlined  in the  Memorandum.  See  "Proposed  Activities  -
          Funding for Partnership  Activities - General" in the Memorandum.  The
          Partnership  to date has borrowed  $24,525 of the  $250,000  available
          limit under the working  capital  credit line and has made a principal
          prepayment  of  $100,000  on April  16,  1998.  As of the date of this
          Summary, the Loan balance is approximately $1,125,490.





            [The remainder of this page is intentionally left blank.]








 
                                                        10
<PAGE>

                     FINANCIAL CONDITION OF THE PARTNERSHIP

          Set forth below are the  Partnership's  internally  prepared,  accrual
          based  (i) Income  Statement for the year ended  December 31, 1997 and
          for the five-month period ended May 31, 1998 and (ii) Balance Sheet as
          of December 31, 1997 and as of May 31, 1998.

                       PACIFIC MEDICAL LIMITED PARTNERSHIP
                         STATEMENT OF INCOME (UNAUDITED)

<TABLE>
<S>                                                <C>            <C>                    <C>            <C>    
                                                         Year Ended                      Five-Month Period Ended
                                                      December 31, 1997                       May 31, 1998
                                                                   Percentage of                        Percentage of
                                                      Amount       Total Revenue           Amount       Total Revenue
Operating Revenue                                   $308,025                 100         $546,795                 100

Salaries and Benefits                                 51,672                16.8           57,305                10.5
Mobile Unit Expense                                    2,916                  .9           45,087                 8.2
Travel and Entertainment                              44,770                14.5           14,434                 2.6
Legal and Professional Fees                           10,013                 3.3            6,051                 1.1
Management Overhead Allocation(1)                     15,503                 5.0           36,548                 6.7
Depreciation and Amortization                        135,944                44.1          105,494                19.3
Other Administrative Expenses                         20,834                 6.8           16,252                 3.0
      Total                                         $281,652                91.4         $281,171                51.4
Net Operating Income                               $  26,373                 8.6         $265,624                48.7
Other Income                                           2,846                  .9           12,558                 2.3
Other Income, Net                                   (29,956)                 9.7        ($29,914)                 5.5
Net Income                                        ($  3,583)                 1.2         $235,710                43.1

</TABLE>

     (1) The amount shown represents the management fees paid to  Lithotripters,
Inc. as management agent for the Partnership.
 

                                                        11
<PAGE>

                       PACIFIC MEDICAL LIMITED PARTNERSHIP
                                  BALANCE SHEET


                                              As of 12/31/97       As of 5/31/98
Cash                                                 $25,938             $72,241
Accounts Receivable                                  308,025             518,380
Prepaid Items                                          3,745               3,437
Property/Equipment (Net)                           1,077,320             975,159
Organizational Costs (Net)                            36,666              33,332
                                                                               
    Total Assets                                  $1,451,694          $1,602,549
Accounts Payable                                      12,224               3,284
Accrued Liabilities                                   20,964              81,943
Long Term Debt*                                    1,201,341           1,125,490
Due to Affiliates                                      4,121               2,877
Retained Earnings                                    (3,583)             (3,583)
Net Income                                                 0             235,710
Partnership Capital**                                216,627             206,828
Partners' Distributions***                                 0            (50,000)
    Total Liabilities and Partner's Capital       $1,451,694          $1,602,549


          * See note 5 in Sources and Applications of Funds Above.

          ** The amount of  Partnership  Capital  shown is the amount of initial
          Partner  Capital  Contributions  less the  syndication  costs  for the
          Offering, plus interest earned thereon.

          *** Although the Partnership made a cash  distribution to its Partners
          at the end of the first  quarter of 1998,  no  assurance  can be given
          that  distributions  in the  same  or any  amount  will be made in the
          future.  See "Summary of the Partnership  Agreement - Profits,  Losses
          and Distributions" in the Memorandum.



 

                                                        12
<PAGE>

                                  THE OFFERING

The Partnership Interests and Purchase Price

          Litho is hereby offering for sale and assignment Partnership Interests
          which  in  the  aggregate  represent  a 6%  economic  interest  in the
          Partnership.  Each  Partnership  Interest  represents  a  1%  economic
          interest in the Partnership.  The price for each Partnership  Interest
          is  $5,000 in cash  payable  at  assignment,  plus the  assumption  of
          Litho's   guaranty   of  the   Partnership's   principal   obligations
          attributable  to  the  purchased   Partnership   Interests  (up  to  a
          $16,520.14 principal guaranty obligation per 1% Partnership Interest).
          The Guaranty is included in the assignment materials accompanying this
          Summary (the "Assignment Packet"). Litho has arranged for financing of
          the Partnership  Interests'  purchase price with First Citizens Bank &
          Trust Company,  Fayetteville,  North Carolina (the "Bank"). Therefore,
          in lieu of paying the purchase  price in cash,  prospective  assignees
          may  execute  and  deliver to the Sales  Agent upon  delivery of their
          Assignment  Packets,  a  Limited  Partner  Note,  a Loan and  Security
          Agreement,   Security   Agreement  and  two  Uniform  Commercial  Code
          Financing Statements ("UCC-1's") (collectively, the "Loan Documents").
          See  "The  Offering-  Limited  Partner  Loans"  and the  forms of the
          Limited  Partner  Note,  the Loan and Security  Agreement and Security
          Agreement  attached  to the Bank  Commitment  as  Exhibits A, B and C,
          respectively,  which is attached hereto as Appendix A, and the UCC-l's
          attached as a part of the Assignment  Packet.  The cash portion of the
          purchase  price for the  Partnership  Interests  has been  arbitrarily
          determined by Litho and is not necessarily  indicative of their value.
          No assurance can be given that the Partnership Interests,  if and when
          transferable,  could be sold for the price set forth herein or for any
          amount. For each 1% Partnership Interest it owns, Litho paid $2,230 in
          cash and  delivered  a guaranty of 1% of the Loan  obligations.  Litho
          purchased  its  Partnership  Interests  on the same terms as the other
          Limited  Partners  except  that  the cash  purchase  price it paid was
          reduced  by $270 per 1%  limited  partnership  unit  because  no sales
          commission  was payable on purchases by Litho or its Affiliates in the
          Offering.

          The cash purchase price,  the Guaranties and, if applicable,  the Loan
          Documents  of the  prospective  assignees  will be held in an interest
          bearing escrow account with the Bank, until either the application for
          assignment  is accepted by Litho and  approved by the Bank,  Litho (or
          the Bank, in the case of a prospective assignee seeking to finance all
          or a  portion  of his  or its  Partnership  Interest  purchase  price)
          rejects the application or this assignment offering is terminated.
    
          A prospective assignee who pays his or its purchase price with a check
          upon submission of his or its Assignment  Packet, and whose assignment
          materials  are received  and accepted by Litho,  will become a Limited
          Partner in the  Partnership.  Acceptance of the assignment by Litho is
          conditioned on (i) the  satisfaction of the suitability  standards for
          an  investor  in the  Partnership  as set  forth  below  and  (ii) the
          prospective  assignee's  Guaranty  being  approved  by the Bank.  Upon
          admission as a Limited Partner, the prospective  assignee's cash funds
          (plus  interest)  will  be  released  from  escrow  to  Litho  and the
          Guaranties  will be released to the Bank.  If a  prospective  assignee
          finances  his or its  purchase  price with the  proceeds  of a Limited
          Partner  Note,  Litho's  decision  to sell and assign the  Partnership
          Interest to such prospective assignee will be further conditioned upon
 

                                                        13
<PAGE>

          the Bank's approval of the  prospective  assignee's Loan Documents and
          the  funding  of the loan  contemplated  thereby.  If the  prospective
          assignee is acceptable to Litho,  after receipt of the Bank's approval
          of his or its Loan Documents,  Litho will inform the Escrow Agent that
          it will assign the Partnership  Interest to the  prospective  assignee
          and the Escrow Agent will  release the Loan  Documents to the Bank and
          the Bank will pay the proceeds from the Limited Partner Loan to Litho.
          The  prospective  assignee  will  then  be  assigned  the  Partnership
          Interest and become a Limited  Partner in the  Partnership at the time
          the Bank  releases the proceeds of his or its Limited  Partner Loan to
          Litho.  In the event an  application  is not accepted,  all cash funds
          (without interest),  the Guaranty and Loan Documents,  if any, held in
          escrow  will  be  returned  to  the  rejected  applicant.   Notice  of
          acceptance of the assignment  materials and admission of a prospective
          assignee as a Limited  Partner in the  Partnership  will be  furnished
          promptly after the Assignment Closing (as defined below).

          Applications for the sale and assignment of Partnership Interests will
          be taken by MedTech  Investments,  Inc., a North Carolina  corporation
          and an Affiliate of Litho and the Partnership (the "Sales Agent"). The
          Sales  Agent has  entered  into a Sales  Agency  Agreement  with Litho
          pursuant to which the Sales Agent has agreed to act as exclusive agent
          for the assignment of the Partnership Interests. The assignment period
          will  commence  on the date  hereof and will  terminate  at 5:00 p.m.,
          Honolulu, Hawaii time on August 24, 1998 (or earlier in the discretion
          of  Litho),  unless  extended  at  the  discretion  of  Litho  for  an
          additional period not to exceed 180 days (the "Assignment Closing").

Limited Partner Loans

          The purchase  price for the  Partnership  Interests is payable in cash
          with  the  prospective  assignee's  cash  funds or the  proceeds  of a
          Limited  Partner Note.  Financing  under the Limited  Partner Note was
          arranged by Litho with the Bank as  provided  in the Bank  Commitment,
          attached hereto as Appendix A.  If the prospective  assignee wishes to
          finance  the  purchase  price of his or its  Partnership  Interest  as
          provided  herein,  he or she must  deliver  to the  Sales  Agent  upon
          submission of his or its Assignment Packet an executed Limited Partner
          Note and Note Addendum, the form of which are attached as Exhibit A to
          the Bank Commitment,  a Loan and Security Agreement, the form of which
          is attached as Exhibit B to the Bank Commitment, a Security Agreement,
          the form of which is attached as Exhibit C to the Bank  Commitment and
          two UCC-1's,  the form of which are attached to the Assignment Packet.
          The  Limited  Partner  Note is  repayable  in 12  installments  in the
          respective amounts set forth in the Bank Commitment.  The installments
          are payable on each January 15th,  April 15th, June 15th and September
          15th  commencing  on  September  15,  1998,  with  a  13th  and  final
          installment  in an amount equal to the principal  balance then owed on
          the Limited Partner Note and all accrued,  unpaid interest thereon due
          and payable on  September  15,  2001.  Interest  accrues at the Bank's
          "Prime  Rate."  The  Prime  Rate  refers  to  that  rate  of  interest
          established by the Bank and identified as such in literature published
          and circulated within the Bank's offices. Such term is used as a means
          of identifying a rate of interest index and not as a representation by
          the Bank that such rate is  necessarily  the lowest or most  favorable
          rate of  interest  offered  to  borrowers  of the  Bank  generally.  A
          prospective  assignee  shall have no claim or right of action based on
          such  premise.  See the form of the Limited  Partner Note  attached as
          Exhibit A to the Bank Commitment.
 

                                                        14
<PAGE>

          The   Limited   Partner   Note  will  be  secured  by  the  cash  flow
          distributions of the prospective  assignee's  Partnership  Interest as
          provided in the Loan and Security Agreement and the Security Agreement
          and as  evidenced by the UCC-1s.  By  executing  the Loan and Security
          Agreement,  the prospective  assignee  requests the Bank to extend the
          Bank  Commitment  to him or it if he or it is  approved  for a Limited
          Partner Loan. The Loan and Security  Agreement also authorizes (i) the
          Bank to pay the proceeds of the Limited Partner Note directly to Litho
          and Litho to acknowledge  receipt thereof and (ii) the  Partnership to
          remit  funds  directly to the Bank out of the  prospective  assignee's
          share of any distributions  represented by the prospective  assignee's
          percentage  Partnership  Interest to fund installment  payments due on
          the prospective  assignee's  Limited Partner Note. See the form of the
          Loan  and  Security  Agreement  attached  as  Exhibit B  to  the  Bank
          Commitment which is attached hereto as Appendix A.

          If the prospective  assignee is approved by the Bank and is acceptable
          to Litho, the Escrow Agent will release the Loan Documents to the Bank
          and the Bank will pay the  proceeds  of the  Limited  Partner  Note to
          Litho. The prospective  assignee will have substantial  exposure under
          the  Limited   Partner   Note.   Regardless  of  the  success  of  the
          Partnership,  the prospective  assignee will remain liable to the Bank
          under his or its Limited Partner Note according to its terms. The Bank
          can accelerate the entire principal amount of the Limited Partner Note
          in the event the Bank in good faith  believes  the  prospect of timely
          payment or performance by the prospective  assignee is impaired or the
          Bank otherwise in good faith deems itself or its  collateral  insecure
          and  upon  certain  other  events,  including,  but  not  limited  to,
          nonpayment of any  installment.  The Bank may also request  additional
          collateral   in  the  event  it  deems  the   Limited   Partner   Note
          insufficiently secured.
 
          THE PROSPECTIVE  ASSIGNEE  SHOULD REVIEW  CAREFULLY ALL THE PROVISIONS
          CONTAINED IN THE BANK  COMMITMENT AND THE TERMS OF THE LIMITED PARTNER
          NOTE AND LOAN  AND  SECURITY  AGREEMENT  WITH HIS OR ITS  COUNSEL  AND
          FINANCIAL  ADVISORS.  LITHO  DOES  NOT  ENDORSE  OR  RECOMMEND  TO THE
          PROSPECTIVE ASSIGNEES THE DESIRABILITY OF OBTAINING FINANCING FROM THE
          BANK NOR DOES  THE  SUMMARY  OF THE  LOAN  DOCUMENTS  PROVIDED  HEREIN
          CONSTITUTE LEGAL ADVICE.

          A Limited  Partner's  liability under a Limited Partner Note continues
          regardless of whether the Limited Partner remains a limited partner in
          the Partnership. A Limited Partner's liability under a Limited Partner
          Note is  directly  with the Bank.  As a  consequence,  such  liability
          cannot be avoided by claims,  defenses or set-offs the Limited Partner
          may  have  against  the  Partnership  or  Litho.  In  addition  to the
          suitability  requirements  discussed below and in the Memorandum,  the
          prospective  assignee must be approved by the Bank for purposes of its
          delivery of the Limited Partner Note. The Bank has established its own
          criteria  for  approving  the   creditworthiness  of  the  prospective
          assignee  and  has  not  established   objective  minimum  suitability
          standards.  Instead,  the Bank is  empowered  to accept or reject  the
          prospective  assignee. To enable the Bank and Litho to make credit and
          investor  decisions,   respectively,  the  prospective  assignee  must
          complete  and  deliver  to Litho  (i) in  the case of  individuals,  a
          Purchaser  Financial  Statement in the form included in the Assignment
          Packet accompanying this Summary, or a substitute  financial statement
          containing the same information as provided therein, and pages one and
          two of the  prospective  assignee's most recently filed Form 1040 U.S.
          Individual  Income Tax Return,  and (ii) in the case of entities,  one
          copy of the prospective
 

                                                        15
<PAGE>

          assignee s  unaudited  balance sheet and income statement for the past
          two years, and the prospective assignee's federal income tax return.

Offering Exemption

          The  Partnership  Interests  are  being  offered  and will be sold and
          assigned  in  reliance  on (i) the  exemption  from  the  registration
          requirements  of the Securities  Act of 1933 provided by  Section 4(1)
          thereof, and (ii) the exemption from registration  provided by Section
          485-6(9)  of the  Hawaii  Revised  Statutes,  1968,  as  amended.  The
          suitability  standards set forth below have been  established in order
          to comply with the terms of these offering exemptions.

Suitability Standards

          An investment in the  Partnership  involves a high degree of financial
          risk and is suitable only for persons of substantial  financial  means
          who have no need for  liquidity  in, and who can bear the loss of, the
          entire  Partnership  Interest  investment.  See "Risk  Factors" in the
          Memorandum.  Each  assignee  must  also be at least  21 years  old and
          otherwise  duly  qualified  to acquire  and hold  limited  partnership
          interests.  Litho  reserves  the right to  refuse  to sell and  assign
          Partnership Interests to any prospective assignee, subject to federal,
          Hawaii and other applicable state securities laws.

          Each  prospective  assignee  must  make an  independent  judgment,  in
          consultation  with  his or its  own  counsel,  accountant,  investment
          advisor  or  business  advisor,  as to whether  an  investment  in the
          Partnership  Interests is  advisable.  The fact that such person meets
          Litho's or the Bank's suitability  standards should in no way be taken
          as an indication  that an investment in the  Partnership  Interests is
          advisable.

          It is anticipated that suitability  standards  comparable to those set
          forth  above will be imposed by the  Partnership  in  connection  with
          resales,  if any, of the  Partnership  Interests.  Transferability  of
          Partnership  Interests  is  severely  restricted  by  the  Partnership
          Agreement  and  the   Assignment   Agreement.   See  "Summary  of  the
          Partnership Agreement" in the Memorandum.

Special Transferee Agreement

          Because the  Partnership  Agreement does not contemplate the ownership
          of  limited  partnership  interests  by  a  closely-held  entity,  the
          assignment of a Partnership  Interest to a prospective entity assignee
          is further  conditioned  upon the  execution  of a Special  Transferee
          Agreement.  The  Special  Transferee  Agreement  provides  for certain
          options  and  calls  upon the  occurrence  of the  dissolution  of the
          entity,  a change in control or ownership and other events as provided
          therein  with respect to the  Partnership  Interest to be held by such
          entity.
 
                                        16
<PAGE>

How to Apply

          Prospective  assignees who meet the  qualifications  for investment in
          the  Partnership  as set  forth in this  Summary,  may  apply  for the
          purchase  and  assignment  of a  Partnership  Interest  by  doing  the
          following:

          a.  Executing the  Assignment  Agreement and Power of Attorney and the
          Counterpart  Signature Page to the Partnership Agreement (the forms of
          which  are  included  in  the  Assignment  Packet   accompanying  this
          Summary);

          b.  Completing,  dating and signing the Guaranty (the form of which is
          included in the Assignment Packet accompanying this Summary);

          c. Completing,  dating and signing the  Questionnaire and Statement of
          Assignee  (the  form of which is  included  in the  Assignment  Packet
          accompanying this Summary);

          d. Having any Purchaser  Representative who has acted on behalf of the
          prospective  assignee in connection  with the purchase and  assignment
          complete, date and sign the Purchaser Representative  Questionnaire (a
          copy of which is available upon request to Litho);

          e.  Either  (i) in the case of  individuals,  completing,  dating  and
          signing the Purchaser Financial Statement (in the form included in the
          Assignment Packet),  or in lieu thereof,  substituting the prospective
          assignee's own personal executed financial statement,  as long as such
          substitute  statement  contains  the same  information  as in the form
          provided,  and  attaching  to the  Purchaser  Financial  Statement  or
          substitute  statement,  as the case may be,  pages  one and two of the
          assignee's  most recently filed Form 1040 U.S.  Individual  Income Tax
          Return,  or (ii) in the case of entities,  attaching  one copy each of
          the  prospective   assignee's   unaudited  balance  sheet  and  income
          statement  for the  past two  years,  and the  prospective  assignee's
          income tax return;

          f.  If the  prospective  assignee  is  financing  his or its  purchase
          pursuant to the Limited  Partner Loan,  by completing  and signing (on
          the front and the back),  but not dating,  a Limited  Partner Note and
          signing the form of Note Addendum  attached thereto (the form of which
          Limited  Partner Note (including the Note Addendum) is included in the
          Assignment   Packet  and  is   attached  as  Exhibit  A  to  the  Bank
          Commitment);

          g.  If the  prospective  assignee  is  financing  his or its  purchase
          pursuant to the Limited  Partner Loan, by completing  and signing (but
          not  dating)  the Loan and  Security  Agreement  (the form of which is
          included in the Assignment  Packet and is attached as Exhibit B to the
          Bank Commitment);

          h.  If the  prospective  assignee  is  financing  his or its  purchase
          pursuant to the Limited  Partner Loan, by completing  and signing (but
          not dating) the Security Agreement (the form
 

                                                        17
<PAGE>

          of which is  included  in the  Assignment  Packet and is  attached  as
          Exhibit C to the Bank Commitment);

          i.  If the  prospective  assignee  is  financing  his or its  purchase
          pursuant to the Limited  Partner Loan,  by completing  and signing two
          copies of the UCC-1 (the form of which is included  in the  Assignment
          Packet);

          j. In the case of an entity assignee, dating and executing the Special
          Transferee Assignee Agreement included in the Assignment Packet; and

          k.  Delivering  or mailing all of the  foregoing to the Sales Agent at
          2008 Litho Place, Fayetteville, North Carolina 28304. If a prospective
          assignee wishes to pay for his or its Partnership Interest in cash, he
          or she should  delete  steps (f),  (g),  (h) and (i) above and instead
          enclose a check in the  amount of $5,000 per 1%  Partnership  Interest
          payable to "First-Citizens  as Escrow Agent for Lithotripters,  Inc. -
          Pacific Medical".

          All   information   provided  by  prospective   assignees,   including
          information  in the  Questionnaire  and  Statement of Assignee and any
          purchaser  financial  information,  will be kept  confidential and not
          disclosed  except  to  Litho,  the  Partnership,  the Bank  and  their
          respective  counsel and Affiliates  and, if required,  to governmental
          and regulatory  authorities.  If a prospective  assignee would like to
          request  additional  information  concerning the Partnership  prior to
          making a decision to acquire a Partnership  Interest,  please  contact
          either the Sales Agent (Jim Brady,  (800)  423-1055) or Litho  (Joseph
          Jenkins, M.D., (800) 682-7971).

                                                        18


 




 








                        AGREEMENT OF LIMITED PARTNERSHIP


                                       OF

                 TEXAS LITHOTRIPSY LIMITED PARTNERSHIP VII, L.P.








 
















<PAGE>

                                    AGREEMENT
                             OF LIMITED PARTNERSHIP
                                       OF
                 TEXAS LITHOTRIPSY LIMITED PARTNERSHIP VII, L.P.

                                TABLE OF CONTENTS

                                                                            Page

         1.       FORMATION..................................................-1-

         2.       NAME.......................................................-1-

         3.       OFFICES....................................................-1-

         4.       PURPOSE....................................................-2-

         5.       TERM.......................................................-2-

         6.       CERTAIN DEFINED TERMS......................................-2-

         7.       CAPITAL CONTRIBUTIONS AND DILUTION OFFERINGS...............-6-

         8.       CONDITIONS TO THE CAPITAL CONTRIBUTIONS OF CERTAIN
                  LIMITED PARTNERS...........................................-7-

         9.       REPRESENTATIONS, WARRANTIES AND COVENANTS OF THE 
                  GENERAL PARTNER............................................-7-

         10.      ADMISSION OF LIMITED PARTNERS..............................-8-

         11.      CAPITAL ACCOUNTS...........................................-9-

         12.      ALLOCATIONS...............................................-10-

         13.      DISTRIBUTIONS.............................................-11-

         14.      RIGHTS AND OBLIGATIONS OF LIMITED PARTNERS................-11-

         15.      LIMITED LIABILITY.........................................-13-

         16.      TRANSFER OF INTERESTS AND ADMISSION OF PARTNERS...........-13-

         17.      OPTIONAL PURCHASE OF LIMITED PARTNERSHIP INTERESTS ON
                  CERTAIN EVENTS............................................-18-


                                                         i
<PAGE>


         18.      SALE, ASSIGNMENT OR OTHER TRANSFER OF THE GENERAL
                  PARTNER'S INTEREST........................................-23-

         19.      TERMINATION OF THE SERVICES OF THE GENERAL PARTNER........-23-

         20.      MANAGEMENT AND OPERATION OF BUSINESS......................-24-

         21.      RESERVES..................................................-27-

         22.      INDEMNIFICATION AND EXCULPATION OF THE GENERAL
                  PARTNER...................................................-27-

         23.      DISSOLUTION OF THE PARTNERSHIP............................-27-

         24.      DISTRIBUTION UPON DISSOLUTION.............................-29-

         25.      BOOKS OF ACCOUNT, RECORDS AND REPORTS.....................-29-

         26.      NOTICES...................................................-30-

         27.      AMENDMENTS................................................-31-

         28.      LIMITATIONS ON AMENDMENTS.................................-31-

         29.      MEETINGS, CONSENTS AND VOTING.............................-31-

         30.      SUBMISSIONS TO THE LIMITED PARTNERS.......................-32-

         31.      ADDITIONAL DOCUMENTS......................................-32-

         32.      SURVIVAL OF RIGHTS........................................-32-

         33.      INTERPRETATION AND GOVERNING LAW..........................-32-

         34.      SEVERABILITY..............................................-33-

         35.      AGREEMENT IN COUNTERPARTS.................................-33-

         36.      THIRD PARTIES.............................................-33-

         37.      POWER OF ATTORNEY.........................................-33-

         38.      ARBITRATION...............................................-34-



                                                        ii
<PAGE>


         39.      CREDITORS.................................................-34-


                                    SCHEDULES

Schedule A  -  Schedule of Partnership Interests


                                                        iii
<PAGE>


THE  LIMITED  PARTNERSHIP  INTERESTS  REPRESENTED  BY THIS  LIMITED  PARTNERSHIP
AGREEMENT HAVE NOT BEEN REGISTERED  WITH THE SECURITIES AND EXCHANGE  COMMISSION
UNDER THE SECURITIES ACT OF 1933, AS AMENDED, UNDER THE TEXAS SECURITIES ACT, AS
AMENDED,  OR  UNDER  SIMILAR  LAWS OR ACTS OF  OTHER  STATES  IN  RELIANCE  UPON
EXEMPTIONS  UNDER SUCH LAWS.  IN ADDITION,  NO TRANSFERS OF LIMITED  PARTNERSHIP
INTERESTS  MAY BE MADE WITHOUT  COMPLIANCE  WITH THE  RESTRICTIONS  SET FORTH IN
ARTICLE 16 BELOW.

                                    AGREEMENT
                             OF LIMITED PARTNERSHIP
                                       OF
                                TEXAS LITHOTRIPSY
                          LIMITED PARTNERSHIP VII, L.P.


THIS AGREEMENT OF LIMITED  PARTNERSHIP (the "Agreement") is made as of September
4, 1998, by and among  LITHOTRIPTERS,  INC., a North Carolina  corporation  (the
"General Partner"), and MICHAEL MADLER, a resident of the State of Texas, as the
Initial Limited Partner.

               1. FORMATION.

               The  Partnership  was formed pursuant to the filing in the Office
          of the  Secretary  of State of Texas on or about  January 5, 1998 of a
          Certificate of Limited  Partnership in accordance  with the provisions
          of the Act.

               2. NAME. 

               2.1 The name of the  Partnership  is "Texas  Lithotripsy  Limited
               Partnership  VII,  L.P."

               2.2 The Partnership  business shall be conducted under such names
          as the  General  Partner  may  from  time to time  deem  necessary  or
          advisable,  provided that appropriate amendments to this Agreement and
          all necessary  filings  under  applicable  assumed or fictitious  name
          statutes or the Act are first obtained.

               3. OFFICES.

               3.1 The  principal  office  of the  Partnership  shall be at 1301
          Capital of Texas Highway, Suite C-300, Austin, Texas 78746, or at such
          other place as the General  Partner may, from time to time,  designate
          by notice to the Limited Partners (the "Records Office").

                                                        -1-
<PAGE>


               3.2 The  Partnership  may have  such  additional  offices  as the
          General Partner may, from time to time, deem necessary or advisable.

               4. PURPOSE.

               The purpose  and  business  of the  Partnership  shall be: (i) to
          become  a  party  to  and  the  survivor  of a  merger  whereby  Texas
          Lithotripsy  Limited  Partnership II L.P., a Texas limited partnership
          ("Texas II"), Texas Lithotripsy  Limited  Partnership IV L.P., a Texas
          limited  partnership  ("Texas IV") and Texas ESWL/Laser  Lithotripter,
          Ltd., a Texas  limited  partnership  ("ESWL")  will be merged with and
          into the Partnership; (ii) to continue the business of Texas II, Texas
          IV and ESWL and to acquire and operate  one or more  additional  fixed
          base or mobile  lithotripters  (or any  other  renal  stone  treatment
          equipment)  for the treatment of renal stones in such  location(s)  as
          the General Partner may determine,  in its sole  discretion,  to be in
          the best interests of the Partnership; (iii) to acquire an interest in
          any  business  entity,   including,   without  limitation,  a  limited
          partnership, limited liability company or corporation, that engages in
          any business activity  described in this Article 4; and (iv) to engage
          in any and all  activities  incidental  or  related  to the  foregoing
          (including  without  limitation bilary lithotripsy if the same is ever
          approved by the FDA),  upon and subject to the terms and conditions of
          this Agreement.

               5. TERM.

               The  Partnership  shall terminate on  December 31,  2040,  unless
          sooner terminated as herein provided.

               6. CERTAIN DEFINED TERMS.

               Certain  terms used in this  Agreement  shall have the  following
          meanings:

               Act. The Act means the Texas Revised Limited  Partnership Act, as
          then in effect.

               Affiliate.   An   Affiliate  is  (i) any   person,   partnership,
          corporation,  association or other legal entity ("person") directly or
          indirectly  controlling,  controlled  by or under common  control with
          another  person;  (ii) any person owning or controlling 10% or more of
          the  outstanding  voting  interest  of such  other  person;  (iii) any
          officer,  director or partner of such  person;  and (iv) if such other
          person is an officer,  director or partner,  any entity for which such
          person acts in such capacity.

               Agreement. This Agreement of Limited Partnership, as the same may
          be amended from time to time.

               Capital Account.  The Partnership capital account of a Partner as
          computed pursuant to Article 11 of this Agreement.


                                                        -2-
<PAGE>


               Capital  Contributions.  All  capital  contributions  made  by  a
          Partner or his  predecessor in interest  which shall include,  without
          limitation,   contributions   made  pursuant  to  Article  7  of  this
          Agreement.

               Capital  Transaction.  Any transaction which, were it to generate
          proceeds,  would produce  Partnership  Sales  Proceeds or  Partnership
          Refinancing Proceeds.

               Code.  The  Internal  Revenue  Code  of  1986,  as  amended,   or
          corresponding provisions of subsequent, superseding revenue laws.

               Dilution Offering.  As provided in Article 7.4 of this Agreement,
          the future offering of additional limited partnership interests in the
          Partnership  as  determined  by the General  Partner.  Any  successful
          Dilution Offering will proportionately reduce the Percentage Interests
          of the then current Partners in the Partnership.

               Domestic  Proceeding.  Any  divorce,  annulment,   separation  or
          similar domestic proceeding between a married couple.

               Effective Time. The time at which the Merger becomes effective as
          provided in the Merger Agreement.

               Equipment.   The   equipment   used  in  the   operation  of  the
          Lithotripter  Systems,  including the mobile transport  vehicles,  the
          lithotripters and miscellaneous medical equipment and supplies.

               ESWL.  Texas  ESWL/Laser  Lithotripter,  Ltd.,  a  Texas  limited
          partnership  organized  and  operated  by its general  partner,  Texas
          Litho,  Inc., a Delaware  corporation  and an Affiliate of the General
          Partner.  Immediately  prior to the Effective Time, Texas Litho,  Inc.
          will  distribute its general  partner  interest in ESWL to the General
          Partner.

               FDA. The United States Food and Drug Administration.

               General   Partner.   The  General  Partner  of  the  Partnership,
          Lithotripters, Inc., a North Carolina corporation.

               Initial Limited Partner.  Michael Madler, a resident of Texas and
          an Affiliate of the General Partner. The Initial Limited Partner is to
          be the only limited partner of the Partnership  until such time as the
          first new Limited Partners are admitted to the  Partnership,  at which
          time the Initial Limited Partner shall withdraw from the Partnership.
 
               Limited Partners. The Limited Partners will be the former limited
          partners  of Texas II,  Texas IV and ESWL  acquiring  limited  partner
          interests in the Partnership pursuant to the Merger,

                                                        -3-
<PAGE>


               those  investors  in the Units  admitted  to the  Partnership  as
          limited  partners  and any  person  admitted  as a limited  partner in
          accordance with the provisions of this Agreement.

               Lithotripters.  The  extracorporeal  shock-wave  lithotripters of
          Texas II, Texas IV and ESWL acquired by the  Partnership in connection
          with  the  Merger  and  any   replacements   therefor  or   additional
          lithotripters to be purchased by the Partnership.

               Lithotripter  Systems.  The  mobile  transport  systems  with the
          installed and operational Lithotripters.

               Losses.   The  net  loss   (including  Net  Losses  from  Capital
          Transactions)  of the  Partnership for each Year of the Partnership as
          determined for federal income tax purposes.

               Majority  in  Interest  of  the  Limited  Partners.  The  Limited
          Partners  who hold more than 50% of the  Percentage  Interests  in the
          Partnership held by the Limited Partners.

               Memorandum.  The Confidential Private Placement Memorandum of the
          Partnership dated September 4, 1998, as amended or as supplemented.

               Merger. The transaction  whereby Texas II, Texas IV and ESWL will
          merge with and into the Partnership at the Effective Time on the terms
          and conditions provided in the Merger Agreement.

               Merger  Agreement.  The  Agreement  and Plan of Merger  among the
          Partnership,  Texas II,  Texas IV,  ESWL and the other  persons  named
          therein providing for the Merger.

               Net Gains from Capital  Transactions.  The gains  realized by the
          Partnership as a result of or upon any sale, exchange, condemnation or
          other  disposition  of the capital  assets of the  Partnership  (which
          assets shall  include Code  Section 1231  assets) or as a result of or
          upon the damage or destruction of such capital assets.

               Net Losses from Capital Transactions.  The losses realized by the
          Partnership as a result of or upon any sale, exchange, condemnation or
          other  disposition  of the capital  assets of the  Partnership  (which
          shall include Code Section 1231  assets) or as a result of or upon the
          damage or destruction of such capital assets.

               Offering.  The  offer to  potential  investors  of up to 40 Units
          pursuant to the Memorandum.

               Partners.   The  General   Partner  and  the  Limited   Partners,
          collectively, where no distinction is required by the context in which
          the term is used herein.


                                                        -4-
<PAGE>


               Partnership.  Texas Lithotripsy  Limited Partnership VII, L.P., a
          Texas limited partnership.

               Partnership Cash Flow. For the applicable  period, the excess, if
          any, of (A) the sum of (i) all gross receipts from any source for such
          period,  other than from Partnership loans,  Capital  Transactions and
          Capital Contributions,  and (ii) any funds released by the Partnership
          from previously established reserves, over (B) the sum of (i) all cash
          expenses paid by the Partnership  for such period;  (ii) the amount of
          all payments of principal on loans to the  Partnership;  (iii) capital
          expenditures of the Partnership;  and (iv) such reasonable reserves as
          the General  Partner shall deem  necessary or prudent to set aside for
          future repairs, improvements or equipment replacement or additions, or
          to meet working capital  requirements or foreseen or unforeseen future
          liabilities and contingencies of the Partnership;  provided,  however,
          that the amounts referred to in (B)(i),  (ii) and (iii) above shall be
          taken  into   account  only  to  the  extent  not  funded  by  Capital
          Contributions,  loans or paid out of previously  established reserves.
          Such term shall also  include all other  funds  deemed  available  for
          distribution and designated as "Partnership  Cash Flow" by the General
          Partner.

               Partnership   Interest.   The   interest  of  a  Partner  in  the
          Partnership as defined by the Act and this Agreement.

               Partnership  Refinancing  Proceeds.  The cash  realized  from the
          refinancing  of  Partnership  assets after  retirement  of any secured
          loans and less (i) payment of all expenses relating to the transaction
          and  (ii) establishment  of such  reasonable  reserves  as the General
          Partner  shall  deem  necessary  or  prudent  to set aside for  future
          repairs,  improvements,  or equipment replacement or additions,  or to
          meet working  capital  requirements  or foreseen or unforeseen  future
          liabilities or contingencies of the Partnership.

               Partnership  Sales  Proceeds.  The cash  realized  from the sale,
          exchange,  casualty  or  other  disposition  of  all or a  portion  of
          Partnership  assets after the retirement of all secured loans and less
          (i) the  payment  of  all  expenses  related  to the  transaction  and
          (ii) establishment  of such reasonable reserves as the General Partner
          shall deem  necessary  or  prudent  to set aside for  future  repairs,
          improvements,  or  equipment  replacement  or  additions,  or to  meet
          working  capital   requirements  or  foreseen  or  unforeseen   future
          liabilities or contingencies of the Partnership.

               Percentage  Interest.   The  interest  of  each  Partner  in  the
          Partnership  as set forth on Schedule A hereto,  which will be amended
          upon the admission of the Limited Partners acquiring their Partnership
          Interests  in the Merger and the  Offering  as  provided in the Merger
          Agreement and the  Memorandum,  respectively.  A Partner's  Percentage
          Interest  may be reduced  by a future  Dilution  Offering.  Any future
          adjustments  in the  Partners'  Percentage  Interests,  due to  future
          Dilution Offerings or otherwise,  will also be reflected by amendments
          to Schedule A.

               Profit.  The net income of the  Partnership  (including Net Gains
          from  Capital  Transactions)  for  each  Year  of the  Partnership  as
          determined for federal income tax purposes.


                                                        -5-
<PAGE>


               Pro Rata Basis. In connection with an allocation or distribution,
          an  allocation  or   distribution  in  proportion  to  the  respective
          Percentage  Interests  of the class of Partners to which  reference is
          made.

               Sales Agency Agreement.  The sales agency agreement through which
          MedTech  Investments,  Inc., an Affiliate of the General Partner and a
          broker-dealer  company  registered  with the  Securities  and Exchange
          commission  and a member of the  National  Association  of  Securities
          Dealers,  Inc.  shall  offer and sell up to 40 Units  pursuant  to the
          Memorandum.

               Sales  Commission.  The $250  sales  commission  paid to  MedTech
          Investments, Inc. for each Unit sold.

               Service. The Internal Revenue Service.

               Texas II. Texas Lithotripsy  Limited Partnership II L.P., a Texas
          limited  partnership  organized  and operated by its general  partner,
          Lithotripters, Inc., a North Carolina corporation

               Texas IV. Texas Lithotripsy  Limited Partnership IV L.P., a Texas
          limited  partnership  organized  and operated by its general  partner,
          Lithotripters, Inc., a North Carolina corporation.

               Units. The 40 equal limited partner  interests in the Partnership
          offered  pursuant to the  Memorandum for a price per Unit of $5,688 in
          cash.

               Year. An annual  accounting  period ending on December 31 of each
          year during the term of the Partnership.

               7. CAPITAL CONTRIBUTIONS AND DILUTION OFFERINGS.

               7.1 General Partner  Contribution.  The General Partner initially
          will hold a 99% Percentage Interest,  which interest shall be canceled
          in the Merger and redetermined following the Effective Time based upon
          the conversion of its general partner  interests in Texas II, Texas IV
          and ESWL in the  Merger on the terms and  conditions  set forth in the
          Merger Agreement.

               7.2 Limited Partner Contribution.  Each Limited Partner acquiring
          his  Partnership  Interest upon the  conversion  of a limited  partner
          interest in either  Texas II,  Texas IV or ESWL in the Merger shall do
          so upon the terms and conditions set forth in the Merger Agreement and
          shall become a Limited  Partner at the  Effective  Time.  Each Limited
          Partner  acquiring  his Units in  connection  with the Offering  shall
          contribute  to the  capital  of the  Partnership  on the  date  of his
          admission to the  Partnership  the cash amount set forth  opposite his
          name on the  amendment to  Schedule A  to be attached  hereto upon the
          closing of such Offering.

               7.3 No Interest. Except as otherwise provided herein, no interest
          shall be paid on any contribution to the capital of the Partnership.


                                                        -6-
<PAGE>


               7.4  Dilution  Offerings.  If the  General  Partner,  in its sole
          discretion,  determines  that  it is  in  the  best  interest  of  the
          Partnership,  the General Partner may, from time to time,  offer, sell
          and issue,  for and on behalf of the Partnership,  additional  limited
          partnership  interests in the  Partnership (a "Dilution  Offering") to
          investors   who  are  not   already   Limited   Partners   ("Qualified
          Investors").  The primary purpose of any Dilution Offering would be to
          raise additional capital for any legitimate Partnership purpose as set
          forth in Article 4. Any limited  partnership  interests offered by the
          Partnership  in a  Dilution  Offering  shall be sold in the manner and
          according  to the  terms  prescribed  in the  sole  discretion  of the
          General  Partner;  provided,  however,  that  any  additional  limited
          partnership  interests offered in a Dilution Offering will be sold for
          a price no lower  than  the  highest  price  for  which  proportionate
          limited partnership  interests in the Partnership have been previously
          sold by the Partnership  (excluding for this purpose the conversion of
          partnership  interests in the Merger) unless otherwise determined by a
          vote of the General  Partner and a Majority in Interest of the Limited
          Partners.  Any sale of additional limited  partnership  interests will
          result in the  proportionate  dilution of the Percentage  Interests of
          the existing Partners.  Any investor  acquiring a limited  partnership
          interest in a Dilution  Offering  shall agree to be bound by the terms
          of this Agreement,  and shall be  automatically  admitted as a Limited
          Partner of the Partnership. Any adjustment in the Partners' Percentage
          Interests  resulting from a Dilution Offering shall be set forth on an
          amended Schedule A to be attached hereto.

               8.  CONDITIONS TO THE CAPITAL  CONTRIBUTIONS  OF CERTAIN  LIMITED
          PARTNERS.

               The   obligations  of  any  Limited   Partners   acquiring  their
          Partnership  Interests in the Offering or a Dilution  Offering to make
          cash Capital Contributions hereunder are subject to the condition that
          the  representations,  warranties,  agreements  and  covenants  of the
          General Partner set forth in Article 9 of this Agreement are and shall
          be true and correct or have been and will have been  complied  with in
          all  material  respects  on the date such  Capital  Contributions  are
          required to be made, except to the extent that any such representation
          or warranty expressly pertains to an earlier date.

               9.  REPRESENTATIONS,  WARRANTIES  AND  COVENANTS  OF THE  GENERAL
          PARTNER.

               9.1 The General  Partner  hereby  represents  and warrants to the
          Limited Partners that:

               (a) The Partnership is a limited partnership formed in accordance
          with and validly  existing under the Act and the other applicable laws
          of the State of Texas;

               (b) The interests in the Partnership of the Limited Partners will
          have been duly  authorized  or  created  and  validly  issued  and the
          Limited Partners shall have no personal  liability to contribute money
          to the Partnership other than the amounts

                                                        -7-
<PAGE>


               agreed to be  contributed  by them in the manner and on the terms
          set forth in this Agreement,  subject, however, to such limitations as
          may be imposed under the Act;

               (c)  Except  as  disclosed  in the  Memorandum  or  documentation
          prepared in connection with a Dilution Offering, no material breach or
          default adverse to the Partnership exists under the terms of any other
          material agreement affecting the Partnership; and

               (d) The General  Partner is a North Carolina  corporation  formed
          and existing under the laws of the State of North Carolina.

               9.2 The General Partner hereby  covenants to the Limited Partners
          that:

               (a) It will at all times act in a fiduciary  manner with  respect
          to the Partnership and the Limited Partners;

               (b)  Except as  provided  in  Article  18,  it will  serve as the
          General Partner of the Partnership until the Partnership is terminated
          without reconstitution; and

               (c) It will  cause  the  Partnership  to  carry  adequate  public
          liability,  property damage and other insurance as is customary in the
          business to be engaged in by the Partnership.

               10. ADMISSION OF LIMITED PARTNERS.

               The  General  Partner  may  permit  the offer and sale of limited
          partnership  interests  on the terms and  conditions  provided  in the
          Merger  Agreement and the Memorandum or future  Dilution  Offering and
          may admit persons subscribing for interests as Limited Partners in the
          Partnership on the terms and conditions set forth in this Article 10.

               (a) The General  Partner  shall have approved of the admission of
          said  person in writing on such terms and  conditions  as the  General
          Partner shall determine;

               (b) Said person shall have executed such documents or instruments
          as the General  Partner may deem  necessary or desirable to effect his
          admission as a Limited Partner;

               (c) Said person shall have  accepted and adopted all of the terms
          and provisions of this Agreement, as then amended;


                                                        -8-
<PAGE>


               (d) Said person (if a  corporation)  shall deliver to the General
          Partner a certified  copy of a  resolution  of its Board of  Directors
          authorizing  it to  become a  Limited  Partner  under  the  terms  and
          conditions of this Agreement; and

               (e) Said person,  upon request by the General Partner,  shall pay
          such  reasonable  expenses as may be incurred in  connection  with its
          admission as a Limited Partner.

               11. CAPITAL ACCOUNTS.

               A Capital Account shall be established for each Partner and shall
          at all times be determined and maintained in accordance with the Final
          Treasury Regulations under Section 704(b) of the Code, as the same may
          be amended.  A Partner  shall not be entitled to withdraw  any part of
          his  Capital  Account  or  to  receive  any   distribution   from  the
          Partnership, except as provided in Articles 13 and 24.

               (a) Each Partners' Capital Account shall be increased by:

                    (i) The  amount  of his  Capital  Contribution  pursuant  to
               Article 7 (or in the case of a Partner  acquiring his Partnership
               Interest  in the Merger,  the  balance of his capital  account in
               Texas II, Texas IV or ESWL,  as the case may be, at the Effective
               Time); and

                    (ii) The  amount of Profits  allocated  to him  pursuant  to
               Article 12; and

                    (iii) The Partner's pro rata share  (determined  in the same
               manner as such  Partner's  share of Profits and Losses  allocated
               pursuant to Article 12  hereof) of any income or gain exempt from
               tax.

               (b) Each Partner's Capital Account shall be decreased by:

                    (i) The  amount  of  Losses  allocated  to him  pursuant  to
               Article 12;  and  

                    (ii) The amount of Partnership Cash Flow,  Partnership Sales
               Proceeds and Partnership  Refinancing Proceeds distributed to him
               pursuant to Article 13; and

                    (iii) The Partner's pro rata share of any other expenditures
               of  the  Partnership   which  are  not  deductible  in  computing
               Partnership  Profits or Losses and which are not added to the tax
               basis of any Partnership property, including, without limitation,
               expenditures

                                                        -9-
<PAGE>


                    described in Section 705(a)(2)(B) of the Code. The Partner's
               pro rata share of such  expenditures  shall be  determined in the
               same  manner  as such  Partner's  share  of  Profits  and  Losses
               allocated pursuant to Article 12.

                    12. ALLOCATIONS

                    (a)  Profits  and  Losses.  The  Profits  and  Losses of the
               Partnership  shall be allocated  among the Partners in accordance
               with their respective Percentage Interests. In allocating Profits
               and Losses,  Net Gains and Losses from  Capital  Transactions  (a
               part of Profits and Losses), if any, shall be allocated first.

                    (b) Qualified  Income  Offset.  If any Partner  unexpectedly
               receives any adjustment,  allocation or distribution described in
               Treasury Regulations Section  1.704-1(b)(2)(ii)(d)(4) through (6)
               which  causes or  increases a deficit  balance in such  Partner's
               Capital Account (adjusted for this purpose in the manner provided
               in Treasury Regulations Section  1.704-1(b)(2)(ii)(d)),  items of
               Partnership income and gain shall be specially  allocated to each
               such Partner in an amount and manner sufficient to eliminate,  to
               the extent  required  by the  Regulations,  the  deficit  Capital
               Account of such Partner as quickly as possible,  provided that an
               allocation  pursuant to this  Article  12(b) shall be made if and
               only to the extent that such Partner would have a deficit Capital
               Account after all other allocations  provided for in this Article
               12 have been  tentatively  made as if this Article 12(b) were not
               in the  Agreement.  This provision is intended to be a "qualified
               income  offset,"  as  defined  in  Treasury  Regulations  Section
               1.704-1(b)(2)(ii)(d),    such   Regulation   being   specifically
               incorporated herein by reference.

                    (c)  Sales   Commission.   The  Sales  Commission  shall  be
               allocated to the Units  acquired in the Offering in proportion to
               their respective capital contributions  represented by such Units
               (i.e., $250 in Sales Commissions per each such Unit). The purpose
               of this  Article  12(c) is to allocate  the Sales  Commission  to
               those  Partners who actually  bore the burden of paying the Sales
               Commission.

                    (d) Allocations  Between  Transferor and Transferee.  In the
               event of the  transfer  (other  than the  pledges of the  General
               Partner s  interest  permitted by Article 18 or Permitted Pledges
               described  in Article  16.2(b)) of all or any part of a Partner's
               interest (in accordance with the provisions of this Agreement) in
               the  Partnership  at any time other than at the end of a Year, or
               the admission of a new Partner (in  accordance  with the terms of
               this Agreement),  the transferring Partner or new Partner's share
               of the Partnership's  income, gain, loss, deductions and credits,
               as computed both for  accounting  purposes and for federal income
               tax purposes,  shall be allocated between the transferor  Partner
               and the transferee Partner (or Partners),  or the new Partner and
               the other Partners, as the case may be, in the same ratio as the

                                                       -10-
<PAGE>


                    number of days in such Year before and after the date of the
               transfer or admission;  provided, however, that if there has been
               a sale or other  disposition of the assets of the Partnership (or
               any part thereof)  during such Year, then the General Partner may
               elect,  in its sole  discretion,  to treat the periods before and
               after the date of the transfer or admission as separate Years and
               allocate the Partnership's net income, gain, net loss, deductions
               and   credits   for   each  of  such   deemed   separate   Years.
               Notwithstanding the foregoing,  the Partnership's "allocable cash
               basis items," as that term is used in Section 706(d)(2)(B) of the
               Code, shall be allocated as required by Section  706(d)(2) of the
               Code and the regulations thereunder.

                    (e) Tax Withholding.  The Partnership shall be authorized to
               pay, on behalf of any Partner, any amounts to any federal,  state
               or  local  taxing   authority,   as  may  be  necessary  for  the
               Partnership to comply with tax withholding provisions of the Code
               or the other income tax or revenue laws of any taxing  authority.
               To the extent the  Partnership  pays any such amounts that it may
               be required to pay on behalf of a Partner,  such amounts shall be
               treated as a cash  Distribution  to such Partner and shall reduce
               the amount otherwise distributable to such Partner.

                    13. DISTRIBUTIONS.

                    (a) Distribution of Partnership Cash Flow.  Partnership Cash
               Flow shall be  distributed  to the Partners  within 60 days after
               the end of each Year, or earlier in the discretion of the General
               Partner, in proportion to their respective  Percentage  Interests
               at the time of distribution.

                    (b)  Distribution  of Partnership  Refinancing  Proceeds and
               Partnership Sales Proceeds.  Partnership Refinancing Proceeds and
               Partnership  Sales  Proceeds shall be distributed to the Partners
               within 60 days of the  Capital  Transaction  giving  rise to such
               proceeds, or earlier in the discretion of the General Partner, in
               proportion to their respective  Percentage  Interests at the time
               of distribution.

                    (c)  Distribution  in Liquidation.  Upon  liquidation of the
               Partnership,  all of the Partnership's property shall be sold and
               Profits  and  Losses  allocated  accordingly.  Proceeds  from the
               liquidation of the Partnership shall be distributed in accordance
               with Article 24.

                    14. RIGHTS AND OBLIGATIONS OF LIMITED PARTNERS.

                    14.1 Management. The Limited Partners shall not take part in
               the management of the business, nor transact any business for the
               Partnership, nor shall they have power to sign for or to bind the
               Partnership.  The Partnership may, however,  contract with one or
               more Limited  Partners to act as the local  medical  directors of
               any Lithotripter System. No Limited Partner may withdraw from the
               Partnership except as expressly permitted herein.

                                                       -11-
<PAGE>


                    14.2 Operation of Lithotripter Systems. The Limited Partners
               shall not operate or utilize any Partnership  Lithotripter System
               or  other  Partnership   equipment  except  pursuant  to  (i)  an
               agreement  with the  Partnership;  or (ii) any other  arrangement
               specifically approved by the General Partner.


                    14.3 Outside  Activities.  The Limited  Partners  agree that
               they  owe  fiduciary   duties  to  the  Partnership   and,  as  a
               consequence,  each  Limited  Partner  (that  is not  the  General
               Partner or an  Affiliate of the General  Partner)  agrees that he
               shall not engage in "Outside  Activities"  (as defined  below) in
               the  "Market  Area"  (as  defined  below)  while he is a  Limited
               Partner in the  Partnership and shall otherwise be subject to the
               provisions of this Article 14.3. The phrase "Outside  Activities"
               means  directly or  indirectly  owning,  leasing or  subleasing a
               lithotripter (or any similar  equipment or competing devices used
               for  treating  renal  or  biliary  stone  disease)  or any  other
               therapeutic  equipment  acquired by the  Partnership.  Prohibited
               indirect ownership shall include without limitation the direct or
               indirect ownership of any interest in a business venture (through
               stock ownership,  partnership interest ownership, ownership by or
               through a close family member, or as otherwise determined in good
               faith by the General Partner) involving the ownership,  purchase,
               lease,  sublease,   promotion,   management  or  operation  of  a
               lithotripter (or similar  equipment or competing devices used for
               treating  renal or  biliary  stone  disease)  or other  competing
               device or equipment,  unless the General Partner  determines that
               such activity by the Limited  Partners is not  detrimental to the
               best interests of the Partnership.  The ownership of less than 1%
               of the capital stock  (calculated  on a fully diluted basis) of a
               corporation  whose stock is publicly owned or regularly traded on
               any public exchange shall not constitute an Outside Activity.

                    Upon the  termination  or  transfer  of a Limited  Partner's
               interest in the Partnership for any reason,  including a transfer
               pursuant to Article 17.3 hereof, the withdrawing  Limited Partner
               shall not,  for a period of two (2) years  following  the date of
               withdrawal, engage in any Outside Activities in any "Market Area"
               in which the  Partnership is  transacting  business or within the
               prior twelve  months has  transacted  business  (the  "Restricted
               Facilities").  For the  purposes of this Article  14.3,  the term
               "Market  Area"  shall mean (i) the area  within a fifty (50) mile
               radius of any Restricted Facility, but if such area is determined
               by a court of  competent  jurisdiction  to be too broad,  then it
               shall mean (ii) the area  within a thirty (30) mile radius of any
               Restricted Facility, but if such area is determined by a court of
               competent  jurisdiction  to be too broad then it shall mean (iii)
               the area  within a  fifteen  (15) mile  radius of any  Restricted
               Facility.

                    In the event a Limited  Partner wishes and intends to engage
               in an Outside  Activity in a Market Area,  he or she must provide
               written  notice of such  intent to the General  Partner  prior to
               engaging in the Outside  Activity.  The written  notice  shall be
               deemed an election by the  Limited  Partner to withdraw  from the
               Partnership  (the  "Notice  of  Withdrawal"),  and shall give the
               General  Partner the purchase  rights as provided in Article 17.3
               hereof.  After  the  Notice of  Withdrawal,  the  former  Limited
               Partner may engage in an Outside Activity in the Market Area only
               after  waiting the period of two years  specified in this Article
               14.3.  In  the  event  of  breach  of  the  waiting  period,  the
               Partnership shall be entitled to any remedy at law or equity with
               respect  to  such  breach,   including   without   limitation  an
               injunction or suit for damages.


                                                       -12-
<PAGE>


                    If  a  Limited  Partner  during  his  participation  in  the
               Partnership  engages  in an  Outside  Activity  in a Market  Area
               without first  notifying the General Partner in violation of this
               Article 14.3, the Limited Partner shall be deemed to have given a
               Notice  of  Withdrawal  on the date  the  General  Partner  first
               becomes aware of the Limited  Partner's  Outside  Activity in the
               Market  Area.  Upon  receiving  a  Limited  Partner's  Notice  of
               Withdrawal or equivalent thereof,  the Partnership may invoke the
               purchase rights provided in Article 17.3 and shall be entitled to
               any other remedy at law or equity including without limitation an
               injunction or suit for damages.  Notwithstanding anything in this
               Section  14.3  to the  contrary,  "Outside  Activity"  shall  not
               include  conduct by any former ESWL limited  partner which he had
               engaged in immediately  prior to the Effective Time and which did
               not  constitute a violation  of Section  16.16(a) of ESWL's First
               Amended  and  Restated  Agreement  of Limited  Partnership  as in
               effect  immediately  prior to the  Merger;  provided,  that  such
               partner does not increase or enhance such  interest or activities
               during the term of the Partnership.

                    14.4  Disclosure of Confidential  Information.  Each Limited
               Partner  acknowledges  and agrees that his  participation  in the
               Partnership  under  this  Agreement   necessarily   involves  his
               understanding  of and access to certain  trade  secrets and other
               confidential  information  pertaining  to  the  business  of  the
               Partnership.  Accordingly,  each Limited  Partner (other than the
               General  Partner and its  Affiliates  that may also hold  Limited
               Partner  Partnership  Interests)  agrees that at all times during
               his  participation  in the  Partnership as a Limited  Partner and
               thereafter,  he will not,  directly  or  indirectly,  without the
               express written authority of the Partnership,  unless required by
               law  or  directed  by  a  applicable   legal   authority   having
               jurisdiction  over the Limited  Partner,  disclose or use for the
               benefit of any person,  corporation  or other entity  (other than
               the  Partnership),   or  himself,   (i)  any  trade,   technical,
               operational, management or other secrets, any patient or customer
               lists  or  other  confidential  or  secret  data,  or  any  other
               proprietary,   confidential   or   secret   information   of  the
               Partnership or (ii) any confidential  information  concerning any
               of the financial arrangements,  financial condition,  hospital or
               physician  contracts,  third  party payor  arrangements,  quality
               assurance  and outcome  analysis  programs,  competitive  status,
               customer or supplier matters,  internal  organizational  matters,
               technical abilities,  or other business affairs of or relating to
               the  Partnership.  The Limited  Partners  (other than the General
               Partner and its  Affiliates  that may also hold  Limited  Partner
               Partnership  Interests)  acknowledge  that  all of the  foregoing
               constitutes  proprietary  information,  which  is  the  exclusive
               property  of the  Partnership.  In the  event of  breach  of this
               Article  14.4  as   determined  by  the  General   Partner,   the
               Partnership shall be entitled to any remedy at law or equity with
               respect  to  such  breach,   including  without  limitation,   an
               injunction or suit for damages.

                    15. LIMITED LIABILITY.

                    No  Limited   Partner   shall  be   required   to  make  any
               contribution  to the  capital  of the  Partnership  except as set
               forth in Article 7, nor shall any Limited Partner in his capacity
               as such,  be bound by, or  personally  liable for,  any  expense,
               liability or obligation of the  Partnership  except to the extent
               of his (i) interest in the  Partnership;  and (ii)  obligation to
               return  distributions made to him under certain  circumstances as
               required by the Act.




                                                       -13-
<PAGE>


                    16. TRANSFER OF INTERESTS AND ADMISSION OF PARTNERS.

                    16.1 Transferability.

                    (a) The term  "transfer"  when used in this  Agreement  with
               respect to a Partnership  Interest  includes a sale,  assignment,
               gift,  pledge,  exchange or any other  disposition  (but does not
               include the issuance of new Partnership Interests pursuant to the
               Merger, the Offering or a Dilution Offering);

                    (b) Except as otherwise provided herein, the General Partner
               shall  not at  any  time  transfer  or  assign  its  interest  or
               obligation as General Partner;

                    (c) The  Partnership  Interest of any Limited  Partner shall
               not be  transferred,  in whole or in part,  except in  accordance
               with the conditions and limitations set forth in Articles 16.2 or
               17;

                    (d) The transferee of a Partnership  Interest by assignment,
               operation of law or otherwise, shall have only the rights, powers
               and privileges  enumerated in Article 16.3 or otherwise  provided
               by law and may not be  admitted to the  Partnership  as a Limited
               Partner  except  as  provided  in  Article  16.4 or as a  General
               Partner except as provided in Article 16.5;

                    (e)  Notwithstanding  any provision  herein to the contrary,
               the  Partnership  Agreement shall in no way restrict the issuance
               or transfers of stock of the General Partner; and

                    (f)  Notwithstanding  any provision  herein to the contrary,
               the  issuance  of  Partnership  Interests  pursuant to a Dilution
               Offering and the admission of new Limited Partners  pursuant to a
               Dilution  Offering shall be governed by the provisions of Article
               7.4 of this Agreement.

                    16.2 Restrictions on Transfers by Limited Partners.

                    (a) All or part of a Partnership Interest may be transferred
               by a Limited Partner only with the prior written  approval of the
               General  Partner,  which approval may be granted or denied in the
               sole discretion of the General Partner.

                    (b) The General  Partner shall not approve any transfer of a
               Partnership Interest, except a pledge of any Partnership Interest
               by the General  Partner to any bank,  insurance  company or other
               financial  institution  to  secure  payment  of  indebtedness  (a
               "Permitted Pledge"),  or otherwise unless the proposed transferee
               shall have furnished the General  Partner with a sworn  statement
               that:


                                                       -14-
<PAGE>


                         (i) The  proposed  transferee  proposes  to acquire his
                    Partnership Interest as a principal,  for investment and not
                    with a view to resale or distribution;

                         (ii) The proposed  transferee  meets such  requirements
                    regarding  sophistication,  income and net worth as required
                    by applicable state and federal securities laws;

                         (iii) The  proposed  transferee  has met such net worth
                    and income suitability standards as have been established by
                    the General Partner;

                         (iv) The proposed transferee recognizes that investment
                    in the Partnership involves certain risks and has taken full
                    cognizance  of  and  understands  all of  the  risk  factors
                    related to the purchase of a Partnership Interest; and

                         (v)  The   proposed   transferee   has  met  all  other
                    requirements   of  the  General  Partner  for  the  proposed
                    transfer.

                    (c) Other than in the case of a Permitted Pledge, a transfer
               of a Partnership  Interest may be made only if, prior to the date
               thereof,  the  Partnership  upon  request  receives an opinion of
               counsel,  satisfactory  in  form  and  substance  to the  General
               Partner, that neither the offering nor the proposed transfer will
               require registration under federal or applicable state securities
               laws or regulations.

     16.3 Rights of Transferee. Unless admitted to the Partnership in accordance
with Article 16.4, the transferee of a Partnership Interest or a part thereof or
any right, title or interest therein shall not be entitled to any of the rights,
powers,  or privileges of his  predecessor in interest,  except that he shall be
entitled to receive and be credited or debited with his  proportionate  share of
Partnership   income,   gains,   Profits,   Losses,   deductions,   credits   or
distributions.  16.4 Admission of Limited Partners. Except as otherwise provided
in Article  17, the General  Partner,  or the  transferee  of all or part of the
Partnership  Interest of either a General Partner or a Limited  Partner,  may be
admitted to the  Partnership as a Limited Partner upon furnishing to the General
Partner all of the following:

     (a) The  written  approval  of a Majority in Interest of all of the Limited
Partners (except the assignor  Partner),  or the assignor  Partner alone,  which
approval  may be granted or denied in the sole  discretion  of such  Partners or
Partner (as the case may be);



                                      -15-
<PAGE>

     (b) The written  approval of the General  Partner,  which  approval  may be
granted or denied in the sole discretion of the General Partner;

     (c) Acceptance,  in a form satisfactory to the General Partner,  of all the
terms and  conditions  of this  Agreement  and any other  documents  required in
connection with the operation of the  Partnership  pursuant to the terms of this
Agreement;

     (d) A properly executed power of attorney  substantially  identical to that
contained in Article 37;

     (e) Such other  documents  or  instruments  as may be  required in order to
effect his or her admission as a Limited Partner; and

     (f) Payment of such  reasonable  expenses as may be incurred in  connection
with his admission as a Limited Partner.

     16.5 Admission of General Partners. A Limited Partner, or the transferee of
all or part of the Partnership  Interest of the General Partner, may be admitted
to the  Partnership as a general  partner upon furnishing to the General Partner
all of the following:

     (a) The  written  consent of both the  General  Partner  and a Majority  in
Interest of the Limited Partners,  which consent may be granted or denied in the
sole discretion of the Partners;

     (b)  Such  financial  statements,  guarantees  or other  assurances  as the
General  Partner may require with regard to the ability of the proposed  general
partner to fulfill the financial obligations of a general partner hereunder;

     (c) Acceptance,  in form  satisfactory to the General  Partner,  of all the
terms and  provisions  of this  Agreement  and any other  documents  required in
connection with the operation of the  Partnership  pursuant to the terms of this
Agreement;

     (d) A certified  copy of a resolution of its Board of Directors (if it is a
corporation)  authorizing  it to  become a general  partner  under the terms and
conditions of this Agreement;

     (e) A power  of  attorney  substantially  identical  to that  contained  in
Article 37;
                
     (f) Such other  documents  or  instruments  as may be  required in order to
effect its admission as a general partner; and


                                      -16-
<PAGE>


     (g) Payment of such  reasonable  expenses as may be incurred in  connection
with its admission as a general partner.

     Notwithstanding  the above, a transferee  that controls or is controlled by
the General  Partner or one or more of its Affiliates  that receives all or part
of the  Partnership  Interest  of the  General  Partner  may be  admitted to the
Partnership  as a general  partner upon  complying  with all the  provisions  of
Article 16.5 except for subparagraph  16.5(a).  As long as the transferee either
controls  or is  controlled  by  the  General  Partner  or one  or  more  of its
Affiliates,  no  Limited  Partner  consents  will  be  required  to  admit  such
transferee as a general partner to the Partnership.

     16.6 Amendment of Certificate of Limited Partnership and Qualification. The
General  Partner shall take all steps  necessary and  appropriate to prepare and
record any  amendments  to the  Certificate  of Limited  Partnership,  as may be
necessary or appropriate  from time to time to comply with the  requirements  of
the Act, including, without limitation, upon the admission to the Partnership of
any general partner pursuant to the provisions of Article 16.5, and may for this
purpose exercise the power of attorney delivered to the General Partner pursuant
to Article 16.5 or 37. In  addition,  the General  Partner  shall take all steps
necessary and appropriate to prepare and record any and all documents  necessary
to qualify the Partnership to do business in jurisdictions where the Partnership
is doing  business,  and may for this  purpose  exercise  the power of  attorney
delivered to the General Partner pursuant to Articles 16.4, 16.5 or 37.

     16.7  Fundamental  Changes.  In the event a plan is approved by the General
Partner  providing  for the  merger or  consolidation  of the  Partnership  with
another  person  or  entity,  or the  sale  of all or  substantially  all of the
Partnership Interests,  including without limitation the exchange of Partnership
Interests for equity  interests in another person or entity or for cash or other
consideration  or  combination  thereof,  then and in such  event,  the  Limited
Partners shall be obligated to take or refrain from taking,  as the case may be,
such actions as the plan may provide, including,  without limitation,  executing
such  instruments,  and providing such  information as the General Partner shall
reasonably  request.  Any plan described in this Article 16.7 may also effect an
amendment to the  Partnership  Agreement  or the  adoption of a new  partnership
agreement in connection with the merger of the  Partnership  with another person
or entity as provided in Section 2.11 of the Act. The plan may also provide that
the General Partner and its Affiliates shall receive fees for services  rendered
in connection  with the  operation of the  Partnership  or any successor  entity
following  the  consummation  of the  transactions  described  in the plan,  and
neither the  Partnership nor the Partners shall have any right by virtue of this
Agreement in the income derived therefrom. Any securities or other consideration
to be distributed  to the Partners  pursuant to the plan shall be distributed in
the  manner  set forth in Article  24(c) as though  the  Partnership  were being
liquidated.  For this purpose only,  the fair market value of the  securities or
other  consideration  to be  received  pursuant  to the plan shall be treated as
"Profits"  and the capital  accounts of the  Partners  shall be increased in the
manner  provided  in Article  11(a)(ii).  No Partner  shall be  entitled  to any
dissent,  appraisal or similar rights in connection with a plan  contemplated by
this Article 16.7.


                                      -17-
<PAGE>


     16.8 Cancellation of Partnership  Interest of Initial Limited Partner.  The
Partnership  Interest of the  Initial  Limited  Partner  will be canceled at the
Effective Time.

     17. OPTIONAL PURCHASE OF LIMITED PARTNERSHIP INTERESTS ON CERTAIN EVENTS.

     17.1  Death.  Upon the death of a Limited  Partner,  the  deceased  Limited
Partner's  executor,  administrator,  or other legal or personal  representative
shall give  written  notice of that fact to the  General  Partner.  The  General
Partner shall have the option to purchase at the Closing (as defined  below) the
Partnership   Interest  of  the  deceased   Limited  Partner  (whose   executor,
administrator  or other  legal or  personal  representative  shall  then  become
obligated  to sell such  Partnership  Interest) at the price  determined  in the
manner  provided  in  Article 17.6  of  this  Agreement  and  on the  terms  and
conditions provided in Article 17.7 of this Agreement. The General Partner shall
have a period of thirty (30) days  following  the date of notice of the death of
the Limited Partner (the "Option  Period") within which to notify in writing the
deceased Limited  Partner's  executor,  administrator or other legal or personal
representative,  whether the General Partner wishes to purchase all or a portion
of the  Partnership  Interest of the deceased  Limited  Partner.  If the General
Partner  does not elect to  purchase  the  entire  Partnership  Interest  of the
deceased  Limited  Partner before the expiration of the Option Period and in the
manner provided  herein,  the portion of the Partnership  Interest not purchased
shall be held by the deceased Limited Partner's executor, administrator or other
legal  representative  pursuant  to the  terms of this  Agreement.  The  General
Partner, in its sole discretion,  may elect to assign its rights to purchase the
Partnership  Interest of a deceased  Limited  Partner under this Article 17.1 to
the Partnership and, in such case, the Partnership shall have the same rights as
provided for the General Partner under this Article 17.1.

     17.2  Bankruptcy,  Insolvency or  Assignment  for Benefit of Creditors of a
Limited Partner. In the event that an involuntary or voluntary  proceeding under
the Federal  Bankruptcy  Code,  as amended,  is filed for or against any Limited
Partner,  or if any Limited  Partner shall make an assignment for the benefit of
his creditors,  or if any Limited Partner has a receiver or custodian  appointed
for his assets,  or any Limited  Partner  generally  fails to pay his debts when
due, the insolvent  Limited  Partner  shall give written  notice (the "Notice of
Insolvency") to the General  Partner of the  commencement of any such proceeding
or the  occurrence  of such event within five days of the first notice to him of
such  commencement  or occurrence of such event.  The General Partner shall have
the option to  purchase  at the  Closing  (as  defined  below)  the  Partnership
Interest of the insolvent  Limited Partner (which the insolvent  Limited Partner
or his trustee,  custodian,  receiver or other personal or legal representative,
as the case may be, shall then become obligated to sell) at the price determined
in the manner  provided in  Article 17.6  of this Agreement and on the terms and
conditions provided in Article 17.7 of this Agreement. The General Partner shall
have a period of thirty (30) days following the date of the Notice of Insolvency
(the "Option  Period")  within which to notify in writing the insolvent  Limited
Partner  or his  trustee,  custodian,  receiver,  or  other  legal  or  personal
representative,  whether the General Partner wishes to purchase all or a portion
of the Partnership  Interest of the insolvent  Limited  Partner.  If the General
Partner  does not elect to  purchase  the  entire  Partnership  Interest  of the
insolvent Limited Partner before the expiration of the

                                      -18-
<PAGE>


Option Period and in the manner provided herein,  the portion of the Partnership
Interest not  purchased  shall be held by the  insolvent  Partner,  his trustee,
custodian,  receiver or other legal or personal  representative  pursuant to the
terms of this Agreement. The General Partner, in its sole discretion,  may elect
to assign  its rights to  purchase  the  Partnership  Interest  of an  insolvent
Limited  Partner under this Article 17.2 to the  Partnership  and, in such case,
the  Partnership  shall have the same rights as provided for the General Partner
under this Article 17.2.

     17.3  Breach of  Article  14.3.  In the event the  General  Partner  either
receives a Notice of Withdrawal  as provided in Article 14.3 or receives  notice
of a breach  of  Article  14.3 by or with  respect  to a  Limited  Partner  (the
"Defaulting  Limited  Partner"),  the  General  Partner  may elect,  in its sole
discretion,  to treat such event as a default  under this  Agreement and enforce
the  provisions of this Article 17.3. If the General  Partner  elects to enforce
the  provisions  of this Article  17.3,  the General  Partner shall give written
notice of such  election  (the "Notice of Default")  to the  Defaulting  Limited
Partner  within 180 days of the date the  General  Partner  first  received  the
Notice of  Withdrawal or notice of the  defaulting  event.  The General  Partner
shall  have the  option to  purchase  at the  Closing  (as  defined  below)  the
Partnership  Interest of the  Defaulting  Limited  Partner (which the Defaulting
Limited Partner shall then become  obligated to sell) at the price determined in
the manner  provided  in  Article  17.6 of this  Agreement  and on the terms and
conditions provided in Article 17.7 of this Agreement. The General Partner shall
have a period of  thirty  (30) days  following  the date it sends the  Notice of
Default (the "Option  Period")  within which to notify in writing the Defaulting
Limited Partner, whether the General Partner wishes to purchase all or a portion
of the Partnership  Interest of the Defaulting  Limited Partner.  If the General
Partner  does not elect to  purchase  the  entire  Partnership  Interest  of the
Defaulting Limited Partner before the expiration of the Option Period and in the
manner provided  herein,  the portion of the Partnership  Interest not purchased
shall be held by the Defaulting  Limited  Partner  pursuant to the terms of this
Agreement. The General Partner, in its sole discretion,  may elect to assign its
rights to purchase  the  Partnership  Interest of a Defaulting  Limited  Partner
under this Article 17.3 to the  Partnership  and, in such case, the  Partnership
shall  have the same  rights as  provided  for the  General  Partner  under this
Article 17.3.

     17.4 Domestic  Proceeding.  In the event that a spouse of a Limited Partner
commences  against  a  Limited  Partner,  or a  Limited  Partner  is named in, a
Domestic Proceeding,  the Limited Partner shall give written notice (the "Notice
of Domestic  Proceeding") to the General Partner of the commencement of any such
proceeding within five days of the first notice to him of such commencement. The
General  Partner  shall have the option to  purchase  at the Closing (as defined
below) the Partnership  Interest of the Limited Partner involved in the Domestic
Proceeding  (which the Limited Partner shall then become  obligated to sell), at
the price  determined in the manner  provided in Article 17.6 of this  Agreement
and on the terms and conditions provided in Article 17.7 of this Agreement.  The
General  Partner  shall have a period of thirty (30) days  following the date of
the Notice of Domestic  Proceeding (the "Option  Period") within which to notify
in writing the Limited Partner involved in the Domestic Proceeding,  whether the
General Partner wishes to purchase all or a portion of the Partnership  Interest
of such Limited  Partner.  If the General Partner does not elect to purchase the
Partnership Interest of the Limited Partner involved

                                      -19-
<PAGE>


in the Domestic Proceeding before the expiration of the Option Period and in the
manner provided  herein,  the portion of the Partnership  Interest not purchased
shall be held by such Limited  Partner  pursuant to the terms of this Agreement.
The General Partner,  in its sole discretion,  may elect to assign its rights to
purchase  the  Partnership  Interest  of the  Limited  Partner  involved  in the
Domestic  Proceeding  under this  Article 17.4 to the  Partnership  and, in such
case,  the  Partnership  shall have the same rights as provided  for the General
Partner under this Article 17.4.

     17.5  Divestiture  Option.  If state  or  federal  regulations  or laws are
enacted or applied,  or if any other legal  developments  occur,  which,  in the
opinion  of the  General  Partner  adversely  affect (or  potentially  adversely
affect) the operation of the Partnership  (e.g., the enactment or application of
prohibitory physician  self-referral  legislation against the Partnership or its
Partners),  the General Partner shall promptly  either,  in its sole discretion,
(i) take the steps outlined in this Article 17.5 to divest the Limited  Partners
of their Partnership Interests,  or (ii) dissolve the Partnership as provided in
Article  23.1(f).  If the General Partner chooses option (i), it shall deliver a
written  notice to all of the Limited  Partners (the "Notice of  Election")  and
purchase such Partnership  Interests for its own account.  The purchase price to
be paid for each  Partnership  Interest  shall be  determined  in the  manner as
provided in Article 17.6 and shall be on the terms and conditions as provided in
Article 17.7. The transfer of the  Partnership  Interests and the payment of the
purchase  price (as  provided  in  Article  17.6)  shall be made at such time as
determined by the General Partner to be in the best interests of the Partnership
and its Limited  Partners.  Each Limited  Partner hereby makes,  constitutes and
appoints  the General  Partner,  with full power of  substitution,  his true and
lawful attorney-in-fact,  to take such actions and execute such documents on his
behalf to effect the  transfer of his  Partnership  Interest as provided in this
Article  17.5.  The  foregoing  power of  attorney  shall not be affected by the
subsequent incapacity or mental incompetence of any Limited Partner.

     17.6  Purchase  Price.  The purchase  price to be paid for the  Partnership
Interest of any Limited  Partner whose interest is being  purchased  pursuant to
the provisions of  Article 17.1,  17.2, 17.3, 17.4 or 17.5 (the "Selling Limited
Partner")  shall be determined in the manner  provided in this Article 17.6. The
purchase price for a Partnership  Interest  purchased pursuant to the provisions
of Article  17.1,  17.2,  17.3 or 17.4 shall be an amount equal to the lesser of
(i) the fair market value of the Selling Limited Partner's  Partnership Interest
on the  Valuation  Date  (prorated  in the  event  that  only a  portion  of his
Partnership  Interest is being  purchased)  as  determined  by an Appraiser  (as
defined  below)  selected by the General  Partner,  or (ii) the Selling  Limited
Partner's share of the  Partnership's  book value, if any (prorated in the event
that only a portion of his Partnership Interest is being purchased) as reflected
by the  Capital  Account of the  Selling  Limited  Partner  (unadjusted  for any
appreciation  in Partnership  assets and as reduced by  depreciation  deductions
claimed  by the  Partnership  for tax  purposes)  as of the  Valuation  Date (as
defined below). The General Partner, in its sole discretion,  may pursue both of
the above valuation  methods and choose the lesser value of the two as indicated
above,  or may designate and follow only one of the methods in  calculating  the
purchase price. In the case of a purchase of a Partnership  Interest pursuant to
the  provisions of Article 17.5,  the purchase price shall be an amount equal to
the greater of (i) two (2) times the aggregate  distributions  made with respect
to such Partnership Interest


                                                       -20-
<PAGE>


     pursuant to Article  13(a)  during the  twelve-month  period  ending on the
Valuation Date or (ii) the Selling Limited  Partner's share of the Partnership's
book value  determined  in the manner  described  above.  For  purposes  of this
Article 17.6, the term  "Appraiser"  shall mean an independent  appraiser who is
qualified in appraising limited partnership  interests and who has at least five
years  experience.  In determining  fair market value,  the Appraiser shall take
into  consideration  any  outstanding  indebtedness,   liabilities,   liens  and
obligations  of the  Partnership  and the  relative  Partnership  Interests  and
capital  accounts of all Partners,  as well as applying any customary  discounts
for  lack of  liquidity  and  control.  Such  appraisal  shall be  conducted  in
accordance with professional appraisal standards. The valuation of the Appraiser
shall be  conclusive  and binding upon the  Partnership,  the  purchaser and the
Selling  Limited  Partner  and his  representatives.  The  determination  of the
Selling Limited Partner's Capital Account or aggregate  distributable  amount on
the  Valuation  Date  (as  defined  below)  shall  be made by the  Partnership's
internal  accountant  (the  "Partnership  Accountant")  upon  a  review  of  the
Partnership  books of  account,  and a formal  audit is  expressly  waived.  The
statement of the  Partnership  Accountant with respect to the Capital Account or
aggregate  distributable  amount of the Selling Limited Partner on the Valuation
Date shall be binding and conclusive upon the Partnership, the purchaser and the
Selling Limited Partner and his representative.  The Valuation Date shall be the
last day of the month immediately  preceding the month in which occurs:  (i) the
death of a  Selling  Limited  Partner,  in the case of a  purchase  by reason of
death;  (ii) the bankruptcy or insolvency of a Selling Limited  Partner,  in the
case of a purchase by reason of such bankruptcy or insolvency;  (iii) the Notice
of  Withdrawal or breach of Article 14.3 as provided in Article 17.3 in the case
of a  purchase  by  reason  thereof;  (iv)  the  commencement  of  the  Domestic
Proceeding,  in the case of a purchase by reason  thereof;  or (v) the Notice of
Election  as  provided  in Article  17.5,  in the case of a  purchase  by reason
thereof. Any Limited Partner whose Partnership Interest is purchased pursuant to
the provisions of Article 17.1,  17.2, 17.3, 17.4 or 17.5 shall be entitled only
to the  purchase  price  which  shall  be paid  at the  Closing  in cash  (or by
certified  or  cashier's  check) and shall not be  entitled  to any  Partnership
distributions  made after the  Valuation  Date.  The  transfer of a  Partnership
Interest  of a  Selling  Limited  Partner  shall  be  deemed  to occur as of the
Valuation  Date and the Selling  Limited  Partner  shall have no voting or other
rights as a Limited  Partner after such date. The purchaser shall be entitled to
any distributions  attributable to the transferred  interest after the Valuation
Date and the  Partnership  shall have the right to deduct the amount of any such
distributions  made to the Selling Limited Partner after the Valuation Date from
the purchase price.

     17.7 Closing.

     17.7.1  Closing of Purchase and Sale.  The Closing of any purchase and sale
of a Partnership  Interest pursuant to Article 17.1, 17.2, 17.3, 17.4 or 17.5 of
this Agreement shall take place at the principal office of the  Partnership,  or
such other place  designated by the General  Partner,  on the date determined as
follows (the "Closing"):

     (a) In the case of a purchase and sale  occurring by reason of the death of
a Limited  Partner as provided in Article  17.1 of this  Agreement,  the Closing
shall be

                                      -21-
<PAGE>


held on the thirtieth  day (or if such  thirtieth day is not a business day, the
next business day following the thirtieth  day) next following the last to occur
of:

     (i) Qualification of the executor or personal administrator of the deceased
Limited Partner's estate;

     (ii) The date on which any necessary determination of the purchase price of
the Partnership Interest to be purchased has been made; or

     (iii) The date that coincides with the close of the Option Period.

     (b) In  the  case  of a  purchase  and  sale  occurring  by  reason  of the
occurrence of one of the events described in Article 17.2, 17.3, 17.4 or 17.5 of
this  Agreement,  the  Closing  shall be held on the  thirtieth  day (or if such
thirtieth  day is not a  business  day,  the next  business  day  following  the
thirtieth day) next following the later to occur of:

     (i) The date on which any necessary  determination of the purchase price of
the Partnership Interest to be purchased has been made; or

     (ii) The date that coincides with the close of the Option Period.
      
     At the Closing,  although not necessary to effect the transfer, the Selling
Limited  Partner shall  concurrently  with tender and receipt of the  applicable
purchase price,  deliver to the purchaser duly executed  instruments of transfer
and assignment,  assigning good and marketable  title to the portion or portions
of the Selling Limited  Partner's  entire  Partnership  Interest thus purchased,
free and clear from any liens or encumbrances  or rights of others therein.  The
parties acknowledge that occurrence of any of the triggering events described in
Article 17.1,  17.2,  17.3, 17.4 or 17.5 and compliance with all the Articles of
this  Agreement,  except the execution of the transfer  documents by the Selling
Limited  Partner as provided  above in this Article  17.7.1,  are  sufficient to
effect the  complete  transfer  of the  Selling  Limited  Partner's  Partnership
Interest and the Selling Limited Partner shall be deemed to consent to admission
of the transferee as a substitute Limited Partner.  Notwithstanding  the date of
the  Closing  or whether a Closing  is  successfully  held,  the  transfer  of a
Partnership Interest of a Selling Limited Partner shall be deemed to occur as of
the Valuation Date as defined in Article 17.6. The deemed  transfer is effective
regardless of whether the Selling Limited Partner  performs the duties set forth
in this Article 17.7.1.

                                      -22-
<PAGE>


     17.7.2 Terms and  Conditions  of Purchase.  The  Partnership  Interest of a
Limited Partner shall not be transferred to any Partner unless the  requirements
of Articles 16.2 and 16.4 (b) through (f) are satisfied  with respect to it. The
purchaser shall be liable for all  obligations  and  liabilities  connected with
that portion of the  Partnership  Interest  transferred  to it unless  otherwise
agreed in writing.

     18. SALE, ASSIGNMENT OR OTHER TRANSFER OF THE GENERAL PARTNER'S INTEREST.

     18.1 The General Partner may not mortgage, pledge,  hypothecate,  transfer,
sell,  assign or  otherwise  dispose of all or any part of its  interest  in the
Partnership,  whether  voluntarily,  by  operation  of  law  or  otherwise  (the
foregoing  actions being  hereafter  collectively  referred to as "Transfers" or
singularly as a "Transfer") except as permitted by this Article.

     18.2 If the General Partner makes a Transfer (other than a mortgage, pledge
or hypothecation) of its general partner interest in the Partnership pursuant to
this Article, it shall be liable for all obligations and liabilities incurred by
it as the general  partner of the Partnership on or before the effective date of
such Transfer, but shall not be liable for any obligations or liabilities of the
Partnership arising after the effective date of the Transfer.

     18.3 No Transfer by the General Partner shall be permitted unless:

     (a) Counsel for the Partnership shall have rendered an opinion that none of
the actions taken in connection with such Transfer will cause the Partnership to
be  classified  other than as a partnership  for federal  income tax purposes or
will cause the  termination or dissolution of the  Partnership  under state law;
and

     (b) Such documents or  instruments,  in form and substance  satisfactory to
counsel for the  Partnership,  shall have been  executed and delivered as may be
required in the opinion of counsel for the  Partnership to effect fully any such
Transfer.

     Notwithstanding the foregoing  provisions of this Article 18.3, the General
Partner  may pledge  its  interest  in the  Partnership  to any bank,  insurance
company or other financial institution to secure payment of indebtedness.

     19. TERMINATION OF THE SERVICES OF THE GENERAL PARTNER.

     If the General  Partner  shall be finally  adjudged by a court of competent
jurisdiction to be liable to the Limited Partners or the Partnership for any act
of gross negligence or willful misconduct in the performance of its duties under
the terms of this  Agreement,  the  General  Partner  may be removed and another
substituted with the consent of all of the Limited Partners.  Such consent shall
be evidenced by a certificate of removal signed by all of the Limited  Partners.
In the


                                      -23-
<PAGE>

event of removal,  the new general  partner  shall succeed to all of the powers,
privileges and  obligations of the General  Partner,  and the General  Partner's
interest in the  Partnership  shall  become that of a Limited  Partner,  and the
General Partner shall maintain its same  Percentage  Interest in the Partnership
notwithstanding  anything contained in the Act to the contrary.  In addition, in
the event of removal, the new general partner shall take all steps necessary and
appropriate  to prepare and record an  amendment to the  Certificate  of Limited
Partnership  to reflect the removal of the General  Partner and the admission of
such new general partner.

     20. MANAGEMENT AND OPERATION OF BUSINESS.

     20.1 All  decisions  with  respect to the  management  of the  business and
affairs of the Partnership shall be made by the General Partner.

     20.2 The General  Partner  shall be under no duty to devote all of its time
to the business of the Partnership,  but shall devote only such time as it deems
necessary  to conduct  the  Partnership  business  and to operate and manage the
Partnership in an efficient manner.

     20.3 The General  Partner may charge to the  Partnership  all  ordinary and
necessary  costs  and  expenses,  direct  and  indirect,   attributable  to  the
activities, conduct and management of the business of the Partnership. The costs
and expenses to be borne by the Partnership  shall include,  but are not limited
to, all expenditures  incurred in acquiring and financing the Equipment or other
Partnership  property,  legal and  accounting  fees and  expenses,  salaries  of
employees of the  Partnership,  consulting  and quality  assurance  fees paid to
independent contractors, insurance premiums and interest.

     20.4 In  addition  to,  and not in  limitation  of,  any  rights and powers
covenanted by law or other provisions of this Agreement,  and except as limited,
restricted  or  prohibited  by the express  provisions  of this  Agreement,  the
General  Partner  shall have and may exercise on behalf of the  Partnership  all
powers and rights necessary,  proper,  convenient or advisable to effectuate and
carry out the purposes, business and objectives of the Partnership.  Such powers
shall include, without limitation, the following:

     (a) To execute and deliver the Merger  Agreement  and conduct the  Offering
and any Dilution Offering on behalf of the Partnership;

     (b) To acquire on behalf of the  Partnership  (i) one or more fixed-base or
mobile  lithotripsy  systems,  (ii) any other assets related to the provision of
lithotripsy  services,  or (iii) any other assets or equipment or an interest in
another entity  consistent  with the purposes of the  Partnership as provided in
Article 4  (collectively,  the "Additional  Assets"),  at such times and at such
price  and upon  such  terms,  as the  General  Partner  deems to be in the best
interest of the Partnership;



                                      -24-
<PAGE>

     (c) To purchase,  hold, manage,  lease,  license and dispose of Partnership
assets,  including the purchase,  exchange,  trade or sale of the  Partnership's
assets at such price, or amount, for cash, securities or other property and upon
such  terms,  as the  General  Partner  deems to be in the best  interest of the
Partnership; provided, that should the Partnership assets be exchanged or traded
for  securities  or other  property  (the  "Replacement  Property")  the General
Partner shall have the same powers with regard to the Replacement Property as it
does towards the traded property;

     (d) To exercise  the option of the General  Partner or the  Partnership  to
purchase a Limited Partner's Partnership Interest pursuant to Article 17;

     (e)  To  determine  the  travel   itinerary  and  site  locations  for  the
Lithotripter Systems or other Partnership technology;

     (f) To borrow money for any Partnership  purpose (including the acquisition
of the Additional Assets) and, if security is required  therefor,  to subject to
any security device any portion of the property for the  Partnership,  to obtain
replacements  of any other  security  device,  to  prepay,  in whole or in part,
refinance,  increase,  modify,  consolidate  or extend any  encumbrance or other
security device;

     (g) To deposit,  withdraw, invest, pay, retain (including the establishment
of reserves  in order to acquire  the  Additional  Assets)  and  distribute  the
Partnership's  funds  in any  manner  consistent  with  the  provisions  of this
Agreement;

     (h) To institute and defend actions at law or in equity;

     (i) To enter into and carry out  contracts  and  agreements  and any or all
documents and  instruments  and to do any and all such other things as may be in
furtherance of  Partnership  purposes or necessary or appropriate to the conduct
of the Partnership activities;

     (j) To execute,  acknowledge and deliver any and all instruments  which may
be deemed necessary or convenient to effect the foregoing;

     (k) To form a new limited  partnership  made up of  qualified  investors to
treat gallstone  patients (if the FDA approves a lithotripter for such purpose),
and to contract on behalf of the  Partnership  with the new limited  partnership
for the use for a fee of a Partnership lithotripter for the treatment of the new
limited partnership's gallstone patients; and

     (l) To engage or retain  one or more  persons  to  perform  acts or provide
materials as may be required by the Partnership,  at the Partnership's  expense,
and to  compensate  such  person or persons  at a rate to be set by the  General
Partner,


                                      -25-
<PAGE>

provided that the  compensation  is at the then  prevailing rate for the type of
services and materials  provided,  or both.  Any person,  whether a Partner,  an
Affiliate of a Partner or otherwise,  including  without  limitation the General
Partner,  may be employed or engaged by the  Partnership to render  services and
provide  materials,   including,   but  not  limited  to,  management  services,
professional services,  accounting services,  quality assessment services, legal
services, marketing services,  maintenance services or provide materials; and if
such person is a Partner or an Affiliate of a Partner,  he shall be entitled to,
and shall be paid compensation for said services or materials,  anything in this
Agreement to the contrary notwithstanding,  provided that the compensation to be
received for such services or materials is  competitive  in price and terms with
then  prevailing rate for the type of services and/or  materials  provided.  The
Partnership, pursuant to the terms of a Management Agreement, will contract with
the General  Partner with respect to the  supervision  and  coordination  of the
management and administration of the day-to-day  operations of the Partnership's
business for a monthly fee equal to 7.5% of Partnership Cash Flow per month. All
costs incurred by the General  Partner under the Management  Agreement  shall be
paid or  reimbursed  by the  Partnership  directly.  The  Partnership  may  also
contract with healthcare  facilities and/or qualified physicians desiring to use
its  Lithotripter  Systems for the treatment of patients.  Owning an interest in
the Partnership shall not be a condition to using any Lithotripter  System.  The
General Partner and its Affiliates may engage in or possess an interest in other
business  ventures of any nature and description  independently  or with others,
including,  but  not  limited  to,  the  operation  of a  fixed-base  or  mobile
lithotripsy  unit,  whether  or not such  business  ventures  are in  direct  or
indirect  competition with the Partnership,  and neither the Partnership nor the
Partners  shall  have  any  right by  virtue  of this  Agreement  in and to said
independent ventures or to the income or profits derived therefrom.

     20.5 In addition to other acts  expressly  prohibited or restricted by this
Agreement  or by law,  the General  Partner  shall have no  authority  to act on
behalf of the Partnership in:

     (a) Doing any act in contravention  of this Agreement or the  Partnership's
Certificate of Limited Partnership;

     (b) Doing any act which would make it  impossible  to carry on the ordinary
business of the Partnership;

     (c) Possessing or in any manner dealing with the Partnership's  property or
assigning the rights of the Partnership in the Partnership's  property for other
than Partnership purposes;

     (d) Admitting a person as a Limited  Partner or a General Partner except as
provided in this Agreement; or



                                      -26-
<PAGE>

     (e) Performing any act (other than an act required by this Agreement or any
act taken in good faith  reliance upon counsel's  opinion)  which would,  at the
time such act  occurred,  subject any Limited  Partner to liability as a general
partner in any jurisdiction.
 
     21. RESERVES.

     The General  Partner may cause the  Partnership to create a reserve account
to be used exclusively for repairs and acquisition of Additional  Assets and for
any other valid  Partnership  purpose.  The General  Partner shall,  in its sole
discretion, determine the amount of payments to such reserve.

     22. INDEMNIFICATION AND EXCULPATION OF THE GENERAL PARTNER.

     22.1 The General  Partner is accountable to the  Partnership as a fiduciary
and consequently must exercise good faith and integrity in handling  Partnership
affairs.  The General Partner and its Affiliates  shall have no liability to the
Partnership which arises out of any action or inaction of the General Partner or
its  Affiliates  if the  General  Partner  or its  Affiliates,  in  good  faith,
determined  that  such  course  of  conduct  was in  the  best  interest  of the
Partnership  and such course of conduct did not constitute  gross  negligence or
willful misconduct of the General Partner or its Affiliates. The General Partner
and its Affiliates  shall be indemnified by the Partnership  against any losses,
judgments,  liabilities,  expenses and amounts paid in  settlement of any claims
sustained by them in  connection  with the  Partnership,  provided that the same
were not the result of gross negligence or willful misconduct on the part of the
General Partner or its Affiliates.

     22.2 The General  Partner shall not be liable for the return of the Capital
Contributions of the Limited Partners,  and upon  dissolution,  Limited Partners
shall look solely to the assets of the Partnership.

     23. DISSOLUTION OF THE PARTNERSHIP.

     23.1 The  Partnership  shall be dissolved and  terminated  and its business
wound up upon the occurrence of any one of the following events:

     (a)  December  31, 1998 if the Merger has not yet become  effective by such
date;

     (b) The expiration of its term on December 31, 2040;

     (c) The  filing by, on behalf of, or  against  the  General  Partner of any
petition or pleading,  voluntary or involuntary,  to declare the General Partner
bankrupt under any bankruptcy  law or act, or the  commencement  in any court of
any


                                                       -27-
<PAGE>

proceeding,  voluntary or involuntary,  to declare the General Partner insolvent
or unable  to pay its  debts,  or the  appointment  by any court or  supervisory
authority of a receiver,  trustee or other custodian of the property,  assets or
business of the General  Partner or the  assignment  by it of all or any part of
its property or assets for the benefit of creditors, if said action,  proceeding
or appointment is not dismissed,  vacated or otherwise  terminated within ninety
(90) days of its commencement;

     (d) The determination of the General Partner that the Partnership should be
dissolved;

     (e) The occurrence of an event  described in a plan approved by the General
Partner   pursuant  to  Article  16.7  resulting  in  the   dissolution  of  the
Partnership;

     (f) The  election  of the  General  Partner  to  dissolve  the  Partnership
following the occurrence of an event described in Article 17.5;

     (g)  Except as  otherwise  provided  in any plan  approved  by the  General
Partner pursuant to Article 16.7, the sale, exchange or other disposition of all
or substantially all of the property of the Partnership without making provision
for the replacement thereof; and

     (h) The dissolution,  retirement,  resignation,  death, disability or legal
incapacity  of  a  general  partner,  and  any  other  event  resulting  in  the
dissolution  or termination  of the  Partnership  under the laws of the State of
Texas; provided, that the events described in Sections 4.02(a)(4) and (5) of the
Act or any  similar  provisions  of any  successor  statute,  shall  not  work a
dissolution of the Partnership except as provided in (c) above.

     23.2  Notwithstanding the provisions of Article 23.1, the Partnership shall
not be dissolved and terminated  upon the retirement,  resignation,  bankruptcy,
assignment for the benefit of creditors, dissolution, death, disability or legal
incapacity of a general partner, and its business shall continue pursuant to the
terms and  conditions  of this  Agreement,  if any  general  partner  or general
partners  remain  following  such event;  provided that such  remaining  general
partner or general partners are hereby obligated to continue the business of the
Partnership.  If no general  partner remains after the occurrence of such event,
the  business  of the  Partnership  shall  continue  pursuant  to the  terms and
conditions of this  Agreement,  if, within ninety (90) days after the occurrence
of such event,  a Majority in Interest of the Limited  Partners agree in writing
to  continue  the  business  of  the  Partnership,  and,  if  necessary,  to the
appointment  of one or more persons or entities to be substituted as the general
partner.  In the event the Limited  Partners agree as provided above to continue
the business of the  Partnership,  the new general  partner or general  partners
shall succeed to all of the powers,  privileges  and  obligations of the General
Partner,  and the General  Partner's  interest in the Partnership shall become a
Limited Partner's interest hereunder.


                                      -28-
<PAGE>

Furthermore,  in the event a remaining  general partner or the Limited Partners,
as the case  may be,  agree to  continue  the  business  of the  Partnership  as
provided herein,  the remaining  general partner or the newly appointed  general
partner or general partners,  as the case may be, shall take all steps necessary
and appropriate to prepare and record an amendment to the Certificate of Limited
Partnership to reflect the  continuation  of the business of the Partnership and
the admission of a new general partner or general partners, if any.

     24. DISTRIBUTION UPON DISSOLUTION.

     Upon the  dissolution  and  termination  of the  Partnership,  the  General
Partner or, if there is none, a representative  of the Limited  Partners,  shall
cause the cancellation of the Partnership's  Certificate of Limited Partnership,
shall  liquidate the assets of the  Partnership,  and shall apply and distribute
the proceeds of such liquidation in the following order of priority:

     (a) First, to the payment of the debts and liabilities of the  Partnership,
and the expenses of liquidation;

     (b) Second,  to the creation of any reserves which the General  Partner (or
such  representatives of the Limited Partners) may deem reasonably necessary for
the payment of any  contingent or unforeseen  liabilities  or obligations of the
Partnership or of the General  Partner  arising out of or in connection with the
business and operation of the Partnership; and

     (c) Third,  the balance,  if any,  shall be  distributed to the Partners in
accordance  with the Partners'  positive  Capital  Account  balances  after such
Capital  Accounts  are  adjusted  as  provided  by  Article 12,  and  any  other
adjustments  required by the Final Treasury  Regulations under Section 704(b) of
the Code.  Any general  partner with a negative  Capital  Account  following the
distribution  of  liquidation  proceeds or the  liquidation of its interest must
contribute to the  Partnership an amount equal to such negative  Capital Account
on or before the end of the  Partnership's  taxable  year (or, if later,  within
ninety days after the date of liquidation).  Any capital so contributed shall be
(i)  distributed  to those  Partners with positive  Capital  Accounts until such
Capital  Accounts are reduced to zero,  and/or (ii) used to  discharge  recourse
liabilities.

     25. BOOKS OF ACCOUNT, RECORDS AND REPORTS.

     25.1 Proper and complete  records and books of account shall be kept by the
General Partner in which shall be entered fully and accurately all  transactions
and such other  matters  relating to the  Partnership's  business as are usually
entered  into  records  and books of account  maintained  by persons  engaged in
businesses of a like character.  The books and records of the Partnership  shall
be  prepared  according  to the  accounting  method  determined  by the  General
Partner. The Partnership's fiscal year shall be the calendar year. The books and
records shall at all times be


                                      -29-
<PAGE>

maintained  at the  Partnership's  Records  Office  and  shall  be  open  to the
reasonable  inspection and  examination of the Partners or their duly authorized
representatives during reasonable business hours.

     25.2  Within  ninety  (90) days  after the end of each  Year,  the  General
Partner  shall send to each person who was a Limited  Partner at any time during
such year such tax  information,  including,  without  limitation,  Federal  tax
Schedule  K-1, as shall be  reasonably  necessary  for the  preparation  by such
person of his federal  income tax return.  The  General  Partner  will also make
available to the Limited Partners any other information required by the Act.

     25.3 The General Partner shall maintain at the Partnership's Records Office
copies of the Partnership's  original Certificate of Limited Partnership and any
certificate of amendment,  restated  certificate or certificate of  cancellation
with  respect  thereto and such other  documents as the Act shall  require.  The
General Partner will furnish to any Limited Partner upon request or as otherwise
required  by law a copy of the  Partnership's  original  Certificate  of Limited
Partnership  and  any  certificate  of  amendment,   restated  certificate,   or
certificate of cancellation, if any.

     25.4  The  General  Partner  shall,  in its sole  discretion,  make for the
Partnership  any and all  elections  for  federal,  state and local tax purposes
including,  without limitation, any election, if permitted by applicable law, to
adjust the basis of the  Partnership's  property  pursuant to Code Sections 754,
734(b) and 743(b), or comparable provisions of state or local law, in connection
with transfers of interests in the Partnership and Partnership Distributions.

     25.5 The  General  Partner is  designated  as the Tax  Matters  Partner (as
defined in Section  6231 of the Code) and to act in any similar  capacity  under
state or local law, and is authorized  (at the  Partnership's  expense):  (i) to
represent the Partnership  and Partners  before taxing  authorities or courts of
competent  jurisdiction in tax matters  affecting the Partnership or Partners in
their  capacity  as  Partners;  (ii) to extend the  statute of  limitations  for
assessment of tax  deficiencies  against Partners with respect to adjustments to
the  Partnership's  federal,  state or local tax  returns;  (iii) to execute any
agreements  or other  documents  relating  to or  affecting  such  tax  matters,
including  agreements or other  documents that bind the Partners with respect to
such tax matters or otherwise affect the rights of the Partnership and Partners;
and (iv) to  expend  Partnership  funds  for  professional  services  and  costs
associated  therewith.  The General Partner is authorized and required to notify
the federal,  state or local tax authorities of the appointment of a Tax Matters
Partner in the manner provided in Treasury Regulations Section 301.6231(a)(7)-1,
as modified  from time to time.  In its  capacity as Tax  Matters  Partner,  the
General Partner shall oversee the Partnership's tax affairs in the manner which,
in its best judgment, is in the interests of the Partners.

     26. NOTICES.

     All notices under this Agreement shall be in writing and shall be deemed to
have been given when delivered personally,  or mailed by certified or registered
mail, postage prepaid, return receipt requested.  Notices to the General Partner
shall be delivered at, or mailed to, its principal


                                      -30-
<PAGE>

office.  Notices to the  Partnership  shall be  delivered  at, or mailed to, its
principal  office  with a copy to  each of its  business  offices.  Notice  to a
Limited  Partner  shall be delivered to such Limited  Partner,  or mailed to the
last address furnished by him for such purposes to the General Partner.  Limited
Partners shall give notice of a change of address to the General  Partner in the
manner provided in this Article.

     27. AMENDMENTS.

     Subject to the  provisions  of Article  28,  this  Agreement  is subject to
amendment  only by written  consent of the  General  Partner  and a Majority  in
Interest of the Limited Partners;  provided, however, the consent of the Limited
Partners shall not be required if such  amendments are ministerial in nature and
do not  contravene  the provisions of Article 28.  Further,  no Limited  Partner
consent  shall be  required  to amend  Schedule A to reflect  the  admission  of
Partners as contemplated by the Merger,  the Offering,  any Dilution Offering or
as otherwise herein permitted.

     28. LIMITATIONS ON AMENDMENTS.

     Notwithstanding  the  provisions  of  Article  27,  no  amendment  to  this
Agreement shall:

     (a) Enlarge the  obligations of any Partner under this Agreement or convert
the interest in the  Partnership  of any Limited  Partner into the interest of a
general partner or modify the limited liability of any Limited Partner,  without
the consent of such Partner;

     (b) Amend the  provisions  of Article 12, 13, 15 or 24 without the approval
of the General  Partner  and a Majority  in  Interest  of the Limited  Partners;
provided,  however, that the General Partner may at any time amend such Articles
without the consent of the Limited  Partners in order to permit the  Partnership
allocations  to be sustained for federal  income tax purposes,  but only if such
amendments do not materially  affect adversely the rights and obligations of the
Limited Partners,  in which case such amendments may only be made as provided in
this Article 28(b); or

     (c) Amend this Article 28 without the consent of all Partners.

     29. MEETINGS, CONSENTS AND VOTING.

     29.1 A meeting of the  Partnership  to consider  any matter with respect to
which the Partners may vote as set forth in this  Agreement may be called by the
General Partner or by Limited  Partners who hold more than  twenty-five  percent
(25%) of the  aggregate  interests  in the  Partnership  held by all the Limited
Partners.  Upon  receipt of a notice  requesting  a meeting  by such  Partner or
Partners  and stating the purpose of the  meeting,  the General  Partner  shall,
within ten (10) days thereafter, give notice to the Partners of a meeting of the
Partnership to be held at a time and place  generally  convenient to the Limited
Partners on a date not earlier than fifteen (15) days after receipt


                                      -31-
<PAGE>

by the General  Partner of the notice  requesting  a meeting.  The notice of the
meeting shall set forth the time, date, location and purpose of the meeting.

     29.2 Any consent of a Partner  required by this  Agreement  may be given as
follows:

     (a) By a written  consent given by the  consenting  Partner and received by
the  General  Partner at or prior to the doing of the act or thing for which the
consent is solicited, or

     (b) By the affirmative  vote by the consenting  Partner to the doing of the
act or thing for which the consent is solicited at any meeting  called  pursuant
to this Article to consider the doing of such act or thing.

     29.3 When exercising  voting rights expressly granted under the Articles of
this Agreement,  each Partner shall have that number of votes as is equal to the
Percentage Interest of such Partner at the time of the vote, multiplied by 100.

     30. SUBMISSIONS TO THE LIMITED PARTNERS.

     The General Partner shall give the Limited  Partners notice of any proposal
or other  matter  required by any  provision  of this  Agreement or by law to be
submitted for consideration  and approval of the Limited  Partners.  Such notice
shall include any information required by the relevant provision or by law.

     31. ADDITIONAL DOCUMENTS.

     Each party  hereto  agrees to execute and  acknowledge  all  documents  and
writings  which the  General  Partner may deem  necessary  or  expedient  in the
creation of this Partnership and the achievement of its purpose.

     32. SURVIVAL OF RIGHTS.

     Except as herein otherwise  provided to the contrary,  this Agreement shall
be binding upon and inure to the benefit of the parties hereto,  their successor
and assigns.

     33. INTERPRETATION AND GOVERNING LAW.

     When the context in which words are used in this  Agreement  indicates that
such is the intent,  words in the singular  number shall  include the plural and
vise versa;  in addition,  the  masculine  gender shall include the feminine and
neuter  counterparts.  The Article  headings or titles and the table of contents
shall not define,  limit, extend or interpret the scope of this Agreement or any
particular Article. This Agreement shall be governed and construed in accordance
with the laws of the State of Texas  without  giving  effect to the conflicts of
laws provisions thereof.


                                      -32-
<PAGE>

     34. SEVERABILITY.

     If any  provision,  sentence,  phrase  or  word of  this  Agreement  or the
application  thereof to any person or  circumstance  shall be held invalid,  the
remainder of this Agreement,  or the  application of such  provision,  sentence,
phrase, or word to persons or circumstances,  other than those as to which it is
held invalid, shall not be affected thereby.

     35. AGREEMENT IN COUNTERPARTS.

     This Agreement may be executed in several counterparts, each of which shall
be  deemed  an  original,  but all of which  shall  constitute  one and the same
instrument. In addition, this Agreement may contain more than one counterpart of
the  signature  page and this  Agreement  may be executed by the affixing of the
signatures of each of the Partners to one of such  counterpart  signature pages;
all of such signature pages shall be read as though one, and they shall have the
same force and effect as though all of the signers had signed a single signature
page.

     36. THIRD PARTIES.

     The agreements,  covenants and representations contained herein are for the
benefit of the parties  hereto inter se and are not for the benefit of any third
parties including, without limitation, any creditors of the Partnership.

     37. POWER OF ATTORNEY.

     Each Limited  Partner  hereby  makes,  constitutes  and appoints Dr. Joseph
Jenkins and Michael Madler, severally, with full power of substitution, his true
and lawful  attorneys-in-fact,  for him and in his name, place and stead and for
his use and benefit to sign and  acknowledge,  file and record,  any  amendments
hereto  among the Partners  for the further  purpose of executing  and filing on
behalf of each Limited Partner,  any and all certificates of limited partnership
or other  documents  necessary to constitute  the  Partnership  or to effect the
continuation  of the  Partnership,  the  admission  or  withdrawal  of a general
partner or a limited partner,  the qualification of the Partnership in a foreign
jurisdiction (or amendment to such  qualification),  the admission of substitute
Limited Partners or the dissolution or termination of the Partnership,  provided
such  continuation,  admission,  withdrawal,  qualification,  or dissolution and
termination are in accordance with the terms of this Agreement.

     The foregoing power of attorney is a special power of attorney coupled with
an interest,  is irrevocable and shall survive the death or legal  incapacity of
each  Limited  Partner.  It may be  exercised  by any one of said  attorneys  by
listing all of the Limited Partners  executing any instrument over the signature
of the  attorney-in-fact  acting for all of them.  The power of  attorney  shall
survive the delivery of an assignment  by a Limited  Partner of the whole or any
portion of his Unit.  In those cases in which the assignee of, or the  successor
to, a  Limited  Partner  owning a Unit has been  approved  by the  Partners  for
admission to the Partnership as a substitute Limited Partner,


                                      -33-
<PAGE>

the power of attorney shall survive for the sole purpose of enabling the General
Partner to execute, acknowledge and file any instrument necessary to effect such
substitution.

     This power of attorney shall not be affected by the  subsequent  incapacity
or mental incompetence of any Limited Partner.

     38. ARBITRATION.

     Any dispute  arising out of or in  connection  with this  Agreement  or the
breach thereof shall be decided by  arbitration  in Austin,  Texas in accordance
with the then effective commercial arbitration rules of the American Arbitration
Association,   and  judgment   thereof  may  be  entered  in  any  court  having
jurisdiction thereof.

     39. CREDITORS.

     None of the  provisions  of this  Agreement  shall be for the benefit of or
enforceable by any creditors of the Partnership.

















            [The remainder of this page is intentionally left blank]


                                      -34-
<PAGE>

     IN WITNESS  WHEREOF,  the parties have executed  this  Agreement of Limited
Partnership as of the day and year first above written.

                                       GENERAL PARTNER:

                                       LITHOTRIPTERS, INC., 
                                          a North Carolina corporation


                                       By:  __________________________________
                                            Joseph Jenkins, M.D., President

ATTEST:

_________________________                                      [CORPORATE SEAL]
Secretary

[CORPORATE SEAL]
                                            INITIAL LIMITED PARTNER:


                                            __________________________________
                                            Michael Madler


STATE OF NORTH CAROLINA                     )
                                            )
COUNTY OF CUMBERLAND                        )

     On this _______ day of ___________, 1998, before me, the undersigned Notary
Public in and for the  County  of  Cumberland  in the  State of North  Carolina,
personally came Joseph Jenkins,  M.D., who, being by me duly sworn, said that he
is  President  of  Lithotripters,  Inc.,  the  sole  general  partner  of  Texas
Lithotripsy  Limited  Partnership  VII,  L.P.,  that  the  seal  affixed  to the
foregoing  instrument in writing is the corporate seal of the  corporation,  and
that said  writing  was  signed,  sworn to,  and sealed by him in behalf of said
corporation  by its authority  duly given.  And the said Joseph  Jenkins,  M.D.,
further certified that the facts set forth in said writing are true and correct,
and acknowledged said instrument to be the act and deed of said corporation.

                  WITNESS my hand and notarial seal.


                                    -----------------------------------------

                                    Notary Public
My commission expires:

___________________________


                                      -35-
<PAGE>


STATE OF TEXAS                              )
                                            )
COUNTY OF ______________                    )


     I,  _______________________________,  a notary  public in and for the State
and County set forth above,  do hereby  certify that Michael  Madler  personally
appeared before me this _____ day of _________,  1998 and acknowledged and swore
to the due  execution  of the  foregoing  Limited  Partnership  Agreement in his
capacity as the initial limited partner.




                                    ------------------------------------------

                                    Notary Public

My commission expires:

___________________________





                                      -36-
<PAGE>

                           COUNTERPART SIGNATURE PAGE


     By signing this  Counterpart  Signature Page, the undersigned  acknowledges
his or her acceptance of that certain Agreement of Limited  Partnership of Texas
Lithotripsy  Limited  Partnership  VII,  L.P.,  and his or her  intention  to be
legally bound thereby.

                  Dated this _________ day of ___________________, 1998.



                                    -----------------------------------------

                                    Signature



                                    ------------------------------------------

                                    Printed Name




STATE OF _______________                    )
                                            )
COUNTY OF _____________                     )


     BEFORE ME, the  undersigned  Notary  Public in and for the State and County
set forth  above,  on the _______ day of  __________________,  1998,  personally
appeared  ___________________,  and,  being by me first duly sworn,  stated that
(s)he signed this Counterpart Signature Page for the purpose set forth above and
that the statements contained therein are true.




                                    ------------------------------------------

                                    Signature of Notary Public


                                    ------------------------------------------

                                    Printed Name of Notary

My Commission Expires:

___________________________
[SEAL]


                                      -37-
<PAGE>


                                   SCHEDULE A

                        Schedule of Partnership Interests

                 TEXAS LITHOTRIPSY LIMITED PARTNERSHIP VII, L.P.

           CONTRIBUTIONS OF CAPITAL TO THE PARTNERSHIP AND PERCENTAGE
INTERESTS

                                                Cash               Percentage
                   General Partner           Contribution            Interest

              Lithotripters, Inc.                  $0                   99%
              2008 Litho Place
              Fayetteville, NC  28304

              Initial Limited Partners

              Michael Madler                        $0                    1%
              c/o Prime Medical Services, Inc.
              1301 Capital of Texas Highway
              Suite C-300
              Austin, TX   78746


              TOTAL:                                $0                   100%



                                      -38-


 










 

                          AGREEMENT AND PLAN OF MERGER

                                      among

                 TEXAS LITHOTRIPSY LIMITED PARTNERSHIP II L.P.,

                 TEXAS LITHOTRIPSY LIMITED PARTNERSHIP IV L.P.,

                       TEXAS ESWL/LASER LITHOTRIPTER, LTD.

                                       and

                 TEXAS LITHOTRIPSY LIMITED PARTNERSHIP VII, L.P.




                                September 4, 1998





<PAGE>

                                                                            Page

                                TABLE OF CONTENTS

                                      Page
 
                                    ARTICLE I
                                 PLAN OF MERGER

Section 1.01.     Merger.......................................................1

Section 1.02.     Filing.......................................................3

Section 1.03.     Effective Date...............................................3

Section 1.04.     Effect of Merger.............................................3

Section 1.05.     Further Assurances...........................................3

Section 1.06.     Closing......................................................3

                                   ARTICLE II
         REPRESENTATIONS AND WARRANTIES CONCERNING MERGING PARTNERSHIPS

Section 2.01.     Effect of Agreement..........................................4

Section 2.02.     Organization.................................................4

Section 2.03.     Capitalization...............................................5

Section 2.04.     Financial Statements.........................................5

Section 2.05.     Absence of Certain Changes...................................5

Section 2.06.     Litigation...................................................5

Section 2.07.     Property; Title..............................................5

Section 2.08.     Records and Permits.  .......................................6

Section 2.09.     Contracts and Leases.........................................6

Section 2.10      Receivables..................................................6

Section 2.11      Insurance....................................................6

Section 2.12      Employees; Benefits..........................................6


                                                        -i-
<PAGE>

                                                                       
                                                                            Page
                                   ARTICLE III
                   REPRESENTATIONS AND WARRANTIES OF TEXAS VII

Section 3.01.     Organization; Good Standing; Power...........................7

Section 3.02.     Authority Relative to Agreement..............................7

Section 3.03.     Effect of Agreement..........................................7

Section 3.04.     No Other Representations.....................................7

                                   ARTICLE IV
                                CERTAIN COVENANTS

Section 4.01.     Conduct of Business..........................................8

Section 4.02.     Access to Books, Records, and Properties.....................8

Section 4.03.     Confidentiality..............................................8

Section 4.04.     Maintenance of Insurance.....................................8
 
                                    ARTICLE V
                NATURE AND SURVIVAL OF COVENANTS, REPRESENTATIONS
                         AND WARRANTIES; INDEMNIFICATION

Section 5.01.     Survival of Representations..................................9

Section 5.02.     Indemnification by Merging Partnerships......................9

Section 5.03.     Indemnification by Texas VII.................................9

Section 5.04.     Notice of Claim..............................................9

Section 5.05.     Limits of Indemnification...................................10
 
                                   ARTICLE VI
             CONDITIONS PRECEDENT TO THE CONSUMMATION OF THE MERGER

Section 6.01.     Accuracy of Representations and Warranties..................10

Section 6.02.     Performance of Agreements...................................10



                                                       -ii-
<PAGE>
                                                                            Page

Section 6.03. Partnership Approval............................................10
 
                                   ARTICLE VII
                            TERMINATION OF AGREEMENT

Section 7.01.  Conditions for Termination.....................................10
 
                                  ARTICLE VIII
                            MISCELLANEOUS PROVISIONS

Section 8.01.   Expenses......................................................11

Section 8.02.   Governing Law.................................................11

Section 8.03.   Entire Agreement..............................................11

Section 8.04.   Amendments and Modifications..................................11

Section 8.05.   Assignment....................................................11

Section 8.06.   Captions......................................................11

Section 8.07.   Execution in Counterparts.....................................11

Section 8.08.   Number and Gender.............................................11

Section 8.09.   Notices.......................................................12

Section 8.10.   Successors and Assigns........................................12

                                    SCHEDULES

Schedule 2.01 - Defaults & Consents
Schedule 2.02 - Qualifications and Licenses
Schedule 2.03 - Capitalization
Schedule 2.05 - Absence of Certain Changes
Schedule 2.06 - Litigation
Schedule 2.07 - Property; Title
Schedule 2.09 - Contracts and Leases
Schedule 2.11 - Insurance
Schedule 2.12 - Employees; Benefits




                                                       -iii-
<PAGE>



                          AGREEMENT AND PLAN OF MERGER


          THIS  AGREEMENT  AND PLAN OF MERGER  (together  with all Schedules and
     Exhibits hereto, the "Agreement"),  made and entered into as of the 4th day
     of September, 1998, by and among Texas Lithotripsy Limited Partnership VII,
     L.P., a recently  organized Texas limited  partnership  ("Texas VII" or the
     "Surviving Partnership"),  Texas Lithotripsy Limited Partnership II L.P., a
     Texas  limited   partnership   ("Texas  II"),  Texas  Lithotripsy   Limited
     Partnership  IV L.P.,  a Texas  limited  partnership  ("Texas  IV"),  Texas
     ESWL/Laser  Lithotripter,  Ltd.,  a  Texas  limited  partnership  ("ESWL"),
     Lithotripters,  Inc.,  a North  Carolina  corporation  and the sole general
     partner  of Texas II and  Texas IV  ("Litho")  and  Texas  Litho,  Inc.,  a
     Delaware  corporation and the sole general partner of ESWL ("Texas Litho").
     ESWL, Texas II and Texas IV are sometimes  referred to herein  individually
     as a "Merging Partnership" and collectively as the "Merging  Partnerships."
     The Surviving  Partnership and the Merging  Partnerships are also sometimes
     referred to herein collectively as the "Constituent Partnerships."

                                    RECITAL:

          Each of the  Constituent  Partnerships  deems  it  advisable  that the
     Merging  Partnerships merge with and into the Surviving  Partnership on the
     terms and  conditions  set forth  herein  (the  "Merger"),  subject  to the
     approval  of  this  Agreement  by the  partners  of  each  of  the  Merging
     Partnerships  in  the  manner  set  forth  in  their   respective   limited
     partnership agreements.

          THEREFORE,  in  consideration  of the mutual  covenants and agreements
     contained herein, the parties hereto do hereby agree as follows:

                                    ARTICLE I
                                 PLAN OF MERGER

          Section 1.01. Merger.  This Section 1.01 shall constitute the "plan of
     merger"  within the meaning of the Texas Revised  Limited  Partnership  Act
     (the "Act").

          (A) The names of the limited partnerships proposing to merge are Texas
     Lithotripsy  Limited  Partnership  II  L.P.,  a Texas  limited  partnership
     ("Texas  II"),  Texas  Lithotripsy  Limited  Partnership  IV L.P.,  a Texas
     limited partnership ("Texas IV") and Texas ESWL/Laser Lithotripter, Ltd., a
     Texas limited  partnership  ("ESWL")  (each,  a "Merging  Partnership"  and
     collectively  the  "Merging   Partnerships").   The  name  of  the  limited
     partnership  into  which the  Merging  Partnerships  propose  to merge (the
     "Merger")  is Texas  Lithotripsy  Limited  Partnership  VII,  L.P., a Texas
     limited  partnership  (the  "Surviving  Partnership"  or "Texas VII").  The
     Merging Partnerships and the Surviving Partnership are hereinafter referred
     to collectively as the "Constituent Partnerships."

          (B) Until the  effective  time of the Merger (the  "Effective  Time"),
     each of the Constituent Partnerships shall continue to conduct its business
     without  material  change  and  shall  not make any  distribution  or other
     disposition  of any  material  assets,  capital or  surplus,  except in the
     ordinary  course of business  or with the consent of the other  Constituent
     Partnerships.

                                                         1
<PAGE>


          (C) As of the Effective  Time, the Merging  Partnerships'  liabilities
     and assets of every nature shall become those of the Surviving  Partnership
     by operation of law, without  reversion or impairment,  without further act
     or deed, and without any transfer or assignment having occurred.

          (D)(1) At the Effective  Time, by virtue of the Merger and without any
     action on the part of the  general  partner or the  limited  partner of the
     Surviving Partnership, the sole general partner partnership interest in the
     Surviving  Partnership  shall be cancelled and the entire  limited  partner
     partnership  interest of the sole initial  limited partner of the Surviving
     Partnership shall be canceled.

          (2) At the  Effective  Time,  by virtue of the Merger and  without any
     action on the part of the general partner or the limited  partners of Texas
     II, the sole  general  partner  partnership  interest  in Texas II shall be
     converted into and shall  represent the right to receive an 11.507% general
     partner  partnership  interest  in  the  Surviving   Partnership  and  each
     outstanding 1% limited  partner  partnership  interest in Texas II shall be
     converted into and represent the right to receive a 0.514% limited  partner
     partnership interest in the Surviving Partnership (proportionately adjusted
     for fractional percentage interests).

          (3) At the  Effective  Time,  by virtue of the Merger and  without any
     action on the part of the general partner or the limited  partners of Texas
     IV, the sole  general  partner  partnership  interest  in Texas IV shall be
     converted  into and shall  represent the right to receive a 4.120%  general
     partner  partnership  interest  in  the  Surviving   Partnership  and  each
     outstanding 1% limited  partner  partnership  interest in Texas IV shall be
     converted into and represent the right to receive a 0.206% limited  partner
     partnership interest in the Surviving Partnership (proportionately adjusted
     for fractional percentage interests).

          (4) At the  Effective  Time,  by virtue of the Merger and  without any
     action on the part of the general partner or the limited  partners of ESWL,
     the sole general  partner  partnership  interest in ESWL shall be converted
     into and shall  represent  the right to  receive a 5.181%  general  partner
     partnership  interest in the Surviving  Partnership and each outstanding 1%
     limited  partner  partnership  interest in ESWL shall be converted into and
     represent  the  right to  receive  a  0.279%  limited  partner  partnership
     interest  in  the  Surviving  Partnership   (proportionately  adjusted  for
     fractional percentage interests).

          (5) Promptly  after the  Effective  Time,  the general  partner of the
     Surviving  Partnership  shall  prepare  and  execute  an  amendment  to the
     Surviving  Partnership's Agreement of Limited Partnership providing for the
     general and limited partner  partnership  interests herein contemplated and
     deliver  a copy of such  amendment  to each  person  who was a  general  or
     limited partner of any of the Merging Partnerships.

          (6) After the  Effective  Time, no transfer of  partnership  interests
     shall be made on the transfer books of the Merging Partnerships.

          (E) The Texas VII limited  partnership  agreement shall, as amended in
     the  manner  contemplated  in Section  1.01(D)(5)  above,  continue  as the
     Surviving Partnership's agreement of limited partnership.


                                                         2
<PAGE>


          (G)  The  Effective  Time  shall  be  11:59:59  p.m.  on the  day  the
     Certificate of Merger is filed with the Texas Secretary of State.

          Section 1.02.  Filing.  Upon  fulfillment  or waiver of the conditions
     specified in  ARTICLE VI  and  provided  that this  Agreement  has not been
     terminated pursuant to ARTICLE VII, the Constituent Partnerships will cause
     a  Certificate  of Merger  reflecting  the terms of the  Merger in the form
     prescribed  by law to be executed and filed with the  Secretary of State of
     the State of Texas.

          Section  1.03.  Effective  Date.  The Merger shall be effective at the
     Effective Time.

          Section 1.04. Effect of Merger. From and after the Effective Time, the
     separate  existence  of the  Merging  Partnerships  shall  cease,  and  the
     Surviving  Partnership  shall  thereupon  and  thereafter,  to  the  extent
     consistent  with its  Certificate of Limited  Partnership,  possess all the
     rights, privileges,  immunities and franchises, of a public as well as of a
     private nature, of each of the Constituent Partnerships;  and all property,
     real,  personal and mixed, and all debts due on whatever  account,  and all
     other choses in action,  and all and every other interest,  of or belonging
     to or due to  each  of  the  Constituent  Partnerships  shall  vest  in the
     Surviving  Partnership without further act or deed and without any transfer
     or assignment  having  occurred;  and the title to any property or interest
     therein, vested in any of the Constituent  Partnerships shall not revert or
     be in any way impaired by reason of the Merger.  The Surviving  Partnership
     shall  thenceforth  be  responsible  and  liable  for all the  liabilities,
     obligations and penalties of each of the Constituent Partnerships;  and any
     claim  existing or action or proceeding,  civil or criminal,  pending by or
     against any of the  Constituent  Partnerships  may be  prosecuted as if the
     Merger had not taken place, or the Surviving Partnership may be substituted
     in its place;  and any  judgment  rendered  against any of the  Constituent
     Partnerships may be enforced against the Surviving Partnership. Neither the
     rights  of  creditors  nor  any  liens  upon  the  property  of  any of the
     Constituent Partnerships shall be impaired by reason of the Merger.

          Section 1.05. Further Assurances.  If, at any time after the Effective
     Time,  the  Surviving  Partnership  shall  consider or be advised  that any
     further  deeds,  assignments  or assurances in law or any other actions are
     necessary,  desirable  or proper to vest,  perfect  or confirm of record or
     otherwise,  in it, the title to any  property or rights of the  Constituent
     Partnerships  acquired  or to be  acquired by reason of, or as a result of,
     the  Merger,  the  Constituent  Partnerships  agree  that such  Constituent
     Partnerships,  acting through their  respective  general  partners by their
     proper officers and directors,  shall and will execute and deliver all such
     proper  deeds,  assignments  and  assurances  in  law  and  do  all  things
     necessary,  desirable or proper to vest,  perfect or confirm  title to such
     property or rights in the Surviving  Partnership and otherwise to carry out
     the purpose of this Agreement, and that the Surviving Partnership's general
     partner is fully  authorized  and  directed in the name of the  Constituent
     Partnerships or otherwise to take any and all such actions.

          Section 1.06. Closing. The closing of the transactions contemplated by
     this  Agreement  (the  "Closing")  shall take place at the offices of Texas
     VII, 1301 Capital of Texas  Highway,  Suite C-300,  Austin,  Texas 78746 at
     9:00 A.M.,  Central time on the business day following the  satisfaction of
     the  conditions  to Closing  set forth in ARTICLE VI (the  "Closing  Date")
     unless the parties hereto agree upon a different time,  date or place.  The
     Closing shall not be deemed to have occurred until all actions necessary to
     complete the Closing have occurred.



                                                         3

<PAGE>


                                   ARTICLE II
         REPRESENTATIONS AND WARRANTIES CONCERNING MERGING PARTNERSHIPS

          Subject  to the  limitations  and  qualifications  set  forth  in this
     Agreement,   including  the  Disclosure   Schedule   attached   hereto  and
     incorporated herein by reference,  each Merging Partnership  severally (and
     only to the extent any  representation  or warranty pertains to itself) and
     not jointly, represents and warrants, to each other Constituent Partnership
     as follows:

          Section 2.01.  Effect of Agreement.  This Agreement is a legal,  valid
     and  binding  obligation  of the  Merging  Partnership  and is  enforceable
     against  it  in  accordance  with  the  terms  hereof,   except  that  such
     enforceability may be limited by bankruptcy, insolvency,  reorganization or
     other similar laws affecting  creditors' rights generally and by principles
     of equity regarding the availability of remedies.  The Merging  Partnership
     has the  requisite  limited  partnership  power and authority to enter into
     this Agreement and to carry out the transactions  contemplated  hereby and,
     assuming  receipt of the  approvals  described in Section  6.03 below,  the
     execution,  delivery and  performance of this Agreement will have been duly
     and validly  authorized by all necessary limited  partnership action on the
     part of such Merging  Partnership.  Except as set forth on Schedule 2.01 of
     the Disclosure Schedule or to the extent the following would not reasonably
     be  expected  to have a  material  adverse  effect on the  business  of the
     Merging Partnership  ("Material Adverse Effect"),  the execution,  delivery
     and  performance  of this  Agreement  by the  Merging  Partnership  and the
     consummation of the transactions  contemplated  hereby will not (i) require
     the  consent,  approval  or  authorization  of any person  (other  than its
     partners),  corporation,  partnership,  joint  venture  or  other  business
     association or public authority;  (ii) violate,  with or without the giving
     of notice or the passage of time, or both, any provisions of law applicable
     to the Merging  Partnership;  (iii) with or without the giving of notice or
     the  passage  of time,  or both,  conflict  with or  result  in a breach or
     termination of any provision of, or constitute a default  under,  or result
     in  the  creation  of any  lien,  charge  or  encumbrance  upon  any of the
     properties or assets of the Merging  Partnership  pursuant to any agreement
     of limited  partnership  or limited  partnership  certificate  or  material
     indenture,  note, bond, pledge,  mortgage,  deed of trust, lease,  license,
     contract, agreement,  commitment or other instrument, or obligation, or any
     order, judgment, award, decree, statute, ordinance, regulation or any other
     restriction of any kind or character,  to which such Merging Partnership is
     a party or by which it or any of its assets or properties may be bound;  or
     (iv) result in the acceleration of any indebtedness or increase the rate of
     interest   payable  by  the  Merging   Partnership   with  respect  to  any
     indebtedness.  Except to the extent disclosed in the Texas VII Confidential
     Private Placement  Memorandum dated as of even date herewith,  as hereafter
     amended  and  supplemented   (the  "Offering   Memorandum"),   the  Merging
     Partnership is in material  compliance with all applicable  laws, rules and
     regulations.

          Section  2.02.  Organization.  The  Merging  Partnership  is a limited
     partnership  formed  in  accordance  with,  validly  existing  and in  good
     standing under the laws of the State of Texas,  with all requisite  limited
     partnership  power and authority to own,  operate and lease its  properties
     and  to  carry  on  its  business  as  now  being  conducted.  The  Merging
     Partnership neither owns nor has the right to acquire an equity interest in
     any corporation,  partnership or other organization. As of the date of this
     Agreement,  the Merging  Partnership  is qualified to conduct  business and
     holds licenses as provided on Schedule 2.02 of the Disclosure Schedule.



                                                         4
<PAGE>


          Section 2.03. Capitalization. Schedule 2.03 of the Disclosure Schedule
     sets forth the names and respective  partnership  interests of each general
     and  limited  partner  of  record  in the  Merging  Partnership.  Except as
     provided on such Schedule 2.03 or pursuant to the terms of its Agreement of
     Limited Partnership,  to the knowledge of the Merging Partnership there are
     no  outstanding  or authorized  subscriptions,  options,  warrants,  calls,
     rights, commitments or any other agreements of any character obligating the
     Merging  Partnership to issue any additional  capital partner  interests or
     any securities  convertible  into or evidencing the right to subscribe for,
     purchase or acquire any capital partner interests, nor are there any voting
     trusts or any other agreements or understandings with respect to the voting
     of its general and limited partner interests.

          Section 2.04. Financial Statements.  Complete copies of the internally
     prepared  or  audited  financial  statements,  as the case  may be,  of the
     Merging  Partnership for the three-year period ended December 31,  1997 and
     the six-month  period ended June 30, 1998 have  previously been provided to
     Litho or Texas Litho, as the case may be. Such financial statements present
     fairly in all  material  respects  the  financial  position  and results of
     operation of the Merging  Partnership  as of such dates and for the periods
     then  ended,  subject  to year  end  adjustments  in the  case  of  interim
     financial  statements;  provided,  that any unaudited statements (including
     interim  statements)  may not contain  footnotes.  The balance sheet of the
     Merging  Partnership at June 30, 1998 is referred to herein as the "Balance
     Sheet" and June 30, 1998 is referred to herein as the "Balance Sheet Date."
   
          Section  2.05.  Absence  of Certain  Changes. Except  as set forth on
     Schedule 2.05 of the Disclosure  Schedule or otherwise  contemplated by the
     terms of this Agreement,  since the Balance Sheet Date, no material adverse
     change has occurred to the Merging Partnership or its business, properties,
     financial condition or prospects.

          Section 2.06. Litigation.  Except as set forth on Schedule 2.06 of the
     Disclosure  Schedule or the  Section of the  Offering  Memorandum  entitled
     "Regulation",   there  is  no  claim,  action,  suit,   proceeding  (legal,
     administrative   or   otherwise),   investigation   or   inquiry   (by   an
     administrative  agency,  governmental body or otherwise) pending or, to the
     knowledge of the Merging Partnership threatened by or against, or otherwise
     affecting,  the  Merging  Partnership,  its  properties  or  assets  or the
     transactions  contemplated hereby, at law or in equity, or before or by any
     federal,  state,  municipal or other governmental  department,  commission,
     board, agency, instrumentality or authority, domestic or foreign.

          Section  2.07.  Property;  Title.  Schedule  2.07  of  the  Disclosure
     Schedule describes each material item of machinery,  equipment,  furniture,
     supplies, materials, vehicles and other items of tangible personal property
     of every kind owned by the Merging Partnership (the "Partnership  Assets").
     The Merging  Partnership  has good and marketable  title to its Partnership
     Assets,  free and clear of all liens except as disclosed on Schedule  2.07.
     The Merging Partnership does not own an interest in any real property.  The
     Partnership Assets constitute all of the assets of the Merging  Partnership
     required to operate its business in the manner presently  conducted (except
     to the extent a necessary asset may be leased as disclosed on Schedule 2.09
     of the Disclosure  Schedule) and are in good operating order and condition,
     ordinary  wear and tear  excepted and are  suitable for their  intended use
     subject to periodic maintenance.



                                                         5
<PAGE>


          Section  2.08.  Records  and  Permits.  The books and  records  of the
     Merging  Partnership  are  true,  accurate  and  complete  in all  material
     respects.  The Merging  Partnership has obtained all permits,  certificates
     and licenses  required for the conduct of its business and the ownership of
     its  Partnership  Assets the failure of which to obtain or  maintain  could
     reasonably be expected to have a Material  Adverse  Effect (the  "Necessary
     Permits").  The Merging  Partnership  is not in violation of any  Necessary
     Permit and no proceedings  are pending,  or to the knowledge of the Merging
     Partnership, threatened, to revoke or limit any Necessary Permit.
 
          Section 2.09.  Contracts and Leases.  Schedule 2.09 of the  Disclosure
     Schedule lists all contracts, commitments, agreements (including agreements
     for the borrowing of money or the extension of credit),  leases,  licenses,
     understandings  and  obligations,  whether  written  or oral,  to which the
     Merging  Partnership  is party  or by  which  it or any of its  Partnership
     Assets is bound or  affected,  that are  material to the  operation  of its
     business or which impose a material  obligation on the Merging  Partnership
     (the "Contracts").  Each of the Contracts is valid, binding and enforceable
     in accordance with its terms except that such enforceability may be limited
     by bankruptcy,  insolvency,  reorganization or other similar laws affecting
     creditors'  rights  generally  and by  principles  of equity  regarding the
     availability of remedies. Each Contract is in full force and effect. Except
     as set forth on  Schedule 2.01  of the  Disclosure  Schedule,  there are no
     existing defaults, and no events or circumstances have occurred which, with
     or  without  notice or lapse of time or both,  would  constitute  defaults,
     under any of the Contracts by the Merging Partnership or, to its knowledge,
     any other party thereto.

          Section 2.10 Receivables.  All accounts  receivable due to the Merging
     Partnership  are,  and will be at the  Effective  Time,  legal,  valid  and
     binding  obligations,  created in the  ordinary  course of  business of the
     Merging Partnership.

          Section  2.11  Insurance.  Schedule  2.11 of the  Disclosure  Schedule
     describes all insurance policies maintained by the Merging Partnership with
     respect to its business and  Partnership  Assets.  Such policies are valid,
     binding and  enforceable  in  accordance  with their terms except that such
     enforceability may be limited by bankruptcy, insolvency,  reorganization or
     other similar laws affecting  creditors' rights generally and by principles
     of equity  regarding the  availability  of remedies,  are in full force and
     effect,  and all  premiums  due  thereon  have  been  paid and will be paid
     through the Effective Time.

          Section 2.12  Employees;  Benefits.  Schedule  2.12 of the  Disclosure
     Schedule  sets forth a list of the name and  position of each person who is
     employed by the Merging  Partnership or associated with its business in any
     capacity,  as well as each other person to whom the Merging Partnership has
     a policy,  practice or  obligation  to pay or provide  retirement,  health,
     welfare or other benefits of any kind,  together with a description of such
     benefits (other than salary  information).  Except as set forth on Schedule
     2.12, there are no Plans, as defined below,  contributed to,  maintained or
     sponsored by the Merging  Partnership,  to which the Merging Partnership is
     obligated to  contribute  or with respect to which the Merging  Partnership
     has any  liability  or  potential  liability,  whether  direct or indirect,
     including all Plans  contributed to, maintained or sponsored by each member
     of the  controlled  group of  companies,  within the  meaning  of  Sections
     414(b),  414(c),  and  414(m)  of the  Internal  Revenue  Code of 1986,  as
     amended,  of which the  Merging  Partnership  is a member to the extent the
     Merging Partnership has any potential liability with respect to such Plans.
     For purposes of this  Agreement,  the term "Plans" shall mean: (a) employee
     benefit plans as defined in Section 3(3) of the Employee

                                                         6
<PAGE>


          Retirement Income Security Act of 1974, as amended ("ERISA"),  whether
     or not funded and whether or not terminated,  (b) employment agreements and
     (c) personnel  policies or fringe  benefit  plans,  policies,  programs and
     arrangements,  whether or not subject to ERISA,  whether or not funded, and
     whether or not  terminated,  including  without  limitation,  stock  bonus,
     deferred  compensation,   pension,   severance,  bonus,  vacation,  travel,
     incentive,  and health,  disability and welfare  plans.  There is no unfair
     labor practice complaint,  labor organizational effort, strike, slowdown or
     similar  labor  matter   pending  or,  to  the  knowledge  of  the  Merging
     Partnership, threatened against it or affecting its business.

                                   ARTICLE III
                   REPRESENTATIONS AND WARRANTIES OF TEXAS VII

          Subject  to the  limitations  and  qualifications  set  forth  in this
     Agreement, Texas VII represents and warrants to each Merging Partnership as
     follows:

          Section 3.01.  Organization;  Good  Standing;  Power.  Texas  VII is a
     limited partnership formed in accordance with, validly existing and in good
     standing under the laws of the State of Texas and has all requisite limited
     partnership  power and authority to own, lease and operate its prop erties,
     to carry on its  business  as now being  conducted  and to enter  into this
     Agreement and perform its obligations hereunder.

          Section  3.02.   Authority  Relative  to  Agreement.  The   execution,
     delivery and per formance of this Agreement have been duly and  effectively
     authorized by all necessary limited partnership action on the part of Texas
     VII,  and this  Agreement  is a valid,  legally  binding  and en  forceable
     obligation of Texas VII, except that  enforceability  hereof may be limited
     by bankruptcy,  insolvency,  reorganization or other similar laws affecting
     creditors'  rights  generally  and by  principles  of equity  regarding the
     availability of remedies.

          Section  3.03.  Effect  of  Agreement.  The  execution,  delivery  and
     performance  of this  Agreement  by Texas VII and the  consummation  of the
     transactions contemplated hereby will not (i) require the consent, approval
     or authorization of any person, corporation,  partnership, joint venture or
     other  business  association  or public  authority;  (ii) violate,  with or
     without the giving of notice or the passage of time, or both, any provision
     of law now  applicable  to Texas VII;  (iii) with  or without the giving of
     notice or the passage of time, or both, conflict with or result in a breach
     or  termination  of any  provision of, or  constitute a default  under,  or
     result in the creation of any lien,  charge or encumbrance  upon any of the
     property  or assets of Texas  VII  pursuant  to any  agreement  of  limited
     partnership or limited  partnership  certificate,  indenture,  note,  bond,
     pledge,  mortgage,  deed of trust,  lease,  license,  contract,  agreement,
     commitment or other instrument or obligation or any order, judgment, award,
     decree,  statute,  ordinance,  regulation,  or any other restriction of any
     kind or character,  to which Texas VII is a party, or by which Texas VII or
     any  of  its  assets  or  properties  are  bound;  or  (iv) result  in  the
     acceleration  of any  indebtedness  of Texas  VII or  increase  the rate of
     interest payable by Texas VII with respect to any indebtedness.

          Section 3.04. No Other Representations. The proposed business of Texas
     VII is  accurately  described  in the Offering  Memorandum  (subject to the
     limitations,  assumptions and conditions  therein provided and the accuracy
     and completeness of the representations and warranties

                                                         7
<PAGE>


          made herein by the Merging Partnerships) and Texas VII has no material
     assets or liabilities  except as described  therein.  No  representation is
     made  as to the  projected  financial  or  other  results  of its  proposed
     operations.

                                   ARTICLE IV
                                CERTAIN COVENANTS

          Section 4.01.  Conduct of  Business.  Between  the date hereof and the
     Effective  Time,  each Merging  Partnership  and the Surviving  Partnership
     (solely with respect to themselves) covenants and agrees that except as set
     forth herein or in the Offering Memorandum, (i) the business of such person
     will be  conducted  in a  manner  not  materially  different  from its past
     practice  and only in the  ordinary  course,  and (ii) it will refrain from
     incurring  any  material  debt,  liability  or  obligation,  contingent  or
     otherwise absent the consent of the other Constituent Partnerships.

          Section 4.02.  Access to Books,  Records,  and Properties.  Subject to
     Section 4.03 below,  each Party has previously and shall continue to afford
     to each  other  party and its  representatives  reasonable  access to their
     respective properties, books and records at reasonable times.

          Section 4.03.  Confidentiality.  In  recognition  of the  confidential
     nature of certain of the information  which has been or will be provided to
     each  party and its  affiliates  by the other  parties  hereto,  each party
     agrees to retain in confidence (except that it may disclose the information
     herein  described  to its agents,  advisors  and lenders  after making them
     aware of the limitations on disclosure herein set forth and obtaining their
     agreement to abide by them),  information transmitted or disclosed to it by
     any other party and further agrees that it will not use for its own benefit
     or for the benefit of any of its affiliates and will not use or disclose to
     any other third party,  or permit the use or  disclosure to any other third
     party of, any information so obtained or revealed. Notwithstanding anything
     to the  contrary  in the  foregoing  provisions,  such  information  may be
     disclosed  (a) where it is required by court order or decree or  applicable
     law (including to the extent  reasonably  necessary to prepare the Offering
     Memorandum  and provide  adequate  disclosure in connection  with the votes
     described in Section 6.03 below),  (b) if it is  ascertainable  or obtained
     from public or published information,  (c) if the recipient can demonstrate
     that such  information  was properly in its possession  prior to disclosure
     thereof and (d)  following  successful  consummation  of the Closing to the
     extent  required in connection  with the operation of Texas VII's business.
     If any recipient of information shall be required to make disclosure of any
     such  information  by court order or decree or applicable  law, such person
     shall give the affected party or parties prior notice of the making of such
     disclosure  and shall use all  efforts  to afford  them an  opportunity  to
     contest the making of such disclosure.  The restrictions under this Section
     shall survive Closing;  provided further,  that in the event this Agreement
     is terminated prior to Closing,  the restrictions  under this Section shall
     survive such termination  notwithstanding  anything contained herein to the
     contrary.

          Section 4.04. Maintenance of Insurance. Texas VII covenants that for a
     period  of not  less  than  the  longer  of (i)  three  years  or (ii)  the
     expiration of any applicable  statute of limitations or repose, to maintain
     in full  force and  effect  one or more  policies  of  insurance  issued by
     reputable  carriers  providing  coverage against services  furnished by the
     Merging  Partnerships  prior to the  Effective  Time,  in amounts  and with
     deductibles consistent with good and standard industry practices.

                                                         8
<PAGE>



                                    ARTICLE V
                NATURE AND SURVIVAL OF COVENANTS, REPRESENTATIONS
                         AND WARRANTIES; INDEMNIFICATION

          Section  5.01.  Survival  of   Representations.  Except  as  otherwise
     expressly provided herein, all  representations,  warranties,  indemnities,
     covenants  and  agreements  made in this  Agreement and the remedies of the
     parties with respect thereto,  shall,  except to the extent notice is given
     prior to the  expiration of the  applicable  period,  survive the Effective
     Time  hereunder  for a period  of one year.  Any claim for  indemnification
     hereunder  which shall have been asserted  during the survival period shall
     continue in effect with respect to such particular  claims until such claim
     shall have been finally resolved or settled. It is expressly understood and
     agreed  that each  covenant  and  agreement  which by its  nature  survives
     Closing shall survive for an indefinite period except to the extent limited
     by the express terms thereof.

          Section 5.02. Indemnification by Merging Partnerships.  Subject to the
     period of survival set forth in Section 5.01 and the limitations  contained
     in Section 5.05  below,  Litho and Texas Litho,  severally and not jointly,
     shall  indemnify,  defend and hold harmless  Texas VII and its  affiliates,
     partners, agents and employees (collectively,  the "Surviving Indemnitees")
     from,  against  and with  respect to any and all losses,  damages,  claims,
     obligations,  liabilities,  costs and  expenses of any kind or character (a
     "Loss") arising out of or in connection with any of the following:

          (a) any  breach of any of the  representations  or  warranties  of any
     Merging  Partnership of which such person is the general partner  contained
     in or made pursuant to this Agreement; and

          (b) any failure by any Merging Partnership of which such person is the
     general partner to perform or observe, in full, any covenant,  agreement or
     condition to be performed or observed by it pursuant to this Agreement.

          Section 5.03.  Indemnification  by Texas VII. Subject to the period of
     survival  set  forth in  Section  5.01  and the  limitations  contained  in
     Section 5.05  below,  Texas VII shall  indemnify,  defend and hold harmless
     each partner in the Merging  Partnerships from, against and with respect to
     any Loss arising out of or in connection with any of the following:

          (a) any breach of any of the  representations  and warranties of Texas
     VII contained in or made pursuant to this Agreement; and

          (b) any  failure  by Texas VII to  perform or  observe,  in full,  any
     covenant, agreement or condition to be performed or observed by it pursuant
     to this Agreement.

          Section 5.04.  Notice of Claim.  Any party  seeking to be  indemnified
     hereunder  (the  "Indemnified  Party")  shall,  within  15  days  following
     discovery of the matters giving rise to a Loss,  notify the party from whom
     indemnity is sought (the  "Indemnity  Obligor") in writing of any claim for
     recovery,  specifying in  reasonable  detail the nature of the Loss and the
     amount of the liability estimated to arise therefrom.  Failure to give such
     notice shall constitute a waiver of the Loss attributable to such

                                                         9
<PAGE>


          matters only to the extent the indemnitor is actually  damaged thereby
     or such delay causes an additional expense.

Section 5.05. Limits of Indemnification.  The amount payable with respect to any
Loss  by any  Indemnified  Party  (i) shall  be  reduced  by the  amount  of any
insurance  proceeds  received with respect to the Loss,  and each of the parties
hereby  agrees  to use  its  reasonable  best  efforts  to  collect  any and all
insurance  proceeds  to  which  it may  be  entitled  in  respect  of any  Loss;
(ii) shall  be net of any  federal,  state or local tax  benefit  derived by the
Indemnified  Party by reason of the Loss and (iii) shall not include any amounts
related to special,  incidental,  indirect,  cover,  exemplary or  consequential
damages.

                                   ARTICLE VI
             CONDITIONS PRECEDENT TO THE CONSUMMATION OF THE MERGER

          The  obligations of each party under this Agreement are subject to the
     satisfaction  at or  prior  to the  Closing  Date  (including  satisfaction
     thereof  simultaneously with the Closing, it being agreed that no action to
     be taken at the Closing shall be deemed consummated until all actions to be
     taken at the Closing shall be deemed  consummated) of each of the following
     conditions:

          Section  6.01.  Accuracy  of  Representations   and  Warranties.   The
     representations  and warranties of each other party herein  contained shall
     be true and correct in all material  respects on and as of the Closing Date
     with the same  force and  effect as  though  made on and as of the  Closing
     Date, except as affected by transactions contemplated hereby.

          Section 6.02.  Performance of Agreements.  Each other party shall have
     complied with the covenants set forth in Sections 4.01 and 4.02.

          Section  6.03.  Partnership  Approval.  The  partners of each  Merging
     Partnership  shall have approved the Merger in the manner required in their
     respective Agreements of Limited Partnership.

                                   ARTICLE VII
                            TERMINATION OF AGREEMENT

          Section 7.01. Conditions for Termination.  Notwithstanding anything to
     the contrary herein,  this Agreement may be terminated and the transactions
     hereby may be abandoned:

          (A) by the mutual  consent of Litho and Texas  Litho at any time prior
     to the Effective Time;

          (B) by action of any  Merging  Partnership  if the Merger has not been
     consummated  or any other party shall have failed to satisfy the conditions
     to Closing to be satisfied by such party on or before December 31, 1998;



                                                        10
<PAGE>


          (C) by action of any Merging  Partnership  if there  exists a material
     breach  of any  representation,  warranty  or  covenant  made by any  other
     Merging Partnership or by Texas VII following notice thereof and failure by
     such party to cure such breach with 15 days thereafter.

                                  ARTICLE VIII
                            MISCELLANEOUS PROVISIONS

          Section 8.01. Expenses.  Except as otherwise expressly provided herein
     or as provided in the section of the Offering  Memorandum entitled "Sources
     and  Applications  of  Funds,"  each party  will bear its own  expenses  in
     connection with the accounting,  legal, investment banking and professional
     services  required in the negotiation and preparation of this Agreement and
     the consummation of the transactions provided for in this Agreement.

          Section 8.02.  Governing  Law.  This  Agreement  and the  transactions
     contemplated  herein  shall be  governed  by,  interpreted,  construed  and
     enforced in  accordance  with the laws of the State of Texas  applicable to
     contracts made and to be performed entirely within the State of Texas.

          Section  8.03.  Entire   Agreement.  This   Agreement  (including  the
     Schedules and any subsidiary  agreements  incorporated  herein as Exhibits)
     contains  the entire  agreement  of the parties with respect to the subject
     matter  hereof  and  supersedes  any prior  agreement  between or among the
     parties hereto.

          Section 8.04. Amendments and Modifications.  This  Agreement shall not
     be  modified,  amended  or changed in any  respect  except in writing  duly
     signed by the  parties  hereto  and each party  hereby  waives any right to
     amend this Agreement in any other way.

          Section 8.05.  Assignment.  This  Agreement may not be assigned by any
     of the parties  hereto.  Notwithstanding  the  foregoing,  it is  expressly
     agreed that prior to or concurrent with the Effective Time, Texas Litho may
     merge with Litho or  otherwise  convey its  interests  in ESWL to Litho and
     Litho shall succeed to the rights and obligations of Texas Litho hereunder.

          Section  8.06.  Captions.  Captions  in this  Agreement are solely for
     purposes of  identification  and shall not in any manner  alter or vary the
     interpretation or construction of this Agreement.

          Section  8.07.  Execution  in  Counterparts.   This  Agreement  may be
     executed in more than one counterpart,  each of which shall be deemed to be
     an original, but all of which shall be deemed to constitute one instrument.
     It  shall  not be  necessary  for all  parties  to  have  signed  the  same
     counterpart provided that all parties have signed at least one counterpart.

          Section 8.08. Number and Gender.  Throughout this Agreement,  wherever
     the context so requires,  the singular  shall  include the plural,  and the
     masculine  gender shall include the feminine and neuter  genders,  and vice
     versa.


                                                        11
<PAGE>


          Section 8.09.  Notices.  All  notices or other communications that are
     required  or  permitted  hereunder  shall be given in writing  and shall be
     given either by personal  delivery,  by Federal  Express or other overnight
     courier or by telecopy,  shall be deemed to have been given when personally
     delivered,  when  deposited  with charges  prepaid with Federal  Express or
     other nationally  recognized overnight courier service, or when transmitted
     to telecopy machine, addressed to the respective parties as follows:

                  Texas Lithotripsy Limited Partnership II L.P.

                  c/o Lithotripters, Inc
                  2008 Litho Place
                  Fayetteville, NC   28304
                  Facsimile:  (910) 323-9857
                  Attn: Joseph Jenkins, M.D.

                  Texas Lithotripsy Limited Partnership IV L.P.

                  c/o Lithotripters, Inc
                  2008 Litho Place
                  Fayetteville, NC   28304
                  Facsimile:  (910) 323-9857
                  Attn: Joseph Jenkins, M.D.

                  Texas ESWL/Laser Lithotripter, Ltd.

                  c/o Texas Litho, Inc.
                  1301 Capital of Texas Highway
                  Suite C-300
                  Austin, Texas   78746
                  Facsimile:  (512) 328-8510
                  Attn: Michael Madler

                  Texas Lithotripsy Limited Partnership VII, L.P.

                  c/o Lithotripters, Inc
                  1301 Capital of Texas Highway
                  Suite C-300
                  Austin, Texas 78746
                  Facsimile:  (512) 328-8510
                  Attn: Michael Madler

          Any party may by notice  change the  address to which  notice or other
     communications to such party are to be delivered or mailed.

          Section 8.10. Successors and Assigns.  All of the terms and provisions
     of this  Agreement  shall be binding upon and shall inure to the benefit of
     the parties hereto and to the extent

                                                        12
<PAGE>


          permitted herein,  their successors and assigns.  No third parties are
     intended to benefit,  however, from the terms and provisions hereof or from
     any representation, warranty, covenant or obligation set forth herein or in
     any schedule, exhibit or other writing delivered pursuant hereto.






         [The remainder of this page has been left blank intentionally.]






 


                                                        13


IN WITNESS  WHEREOF,  the parties  hereto have executed or caused to be executed
this Agreement on the day and year first above written.

                            TEXAS LITHOTRIPSY LIMITED PARTNERSHIP
                               II L.P.

                            By:      Lithotripters, Inc., sole general partner


                            By: ________________________________________
                                ________________________________________
                                (Type Name and Title)


                             TEXAS LITHOTRIPSY LIMITED PARTNERSHIP
                                IV L.P.

                             By:      Lithotripters, Inc., sole general partner


                             By: ________________________________________
                                 ________________________________________
                                 (Type Name and Title)


                             TEXAS ESWL/LASER LITHOTRIPTER, LTD

                             By:      Texas Litho, Inc., sole general partner


                             By: ________________________________________
                                 ________________________________________
                                 (Type Name and Title)


                             TEXAS LITHOTRIPSY LIMITED PARTNERSHIP
                             VII, L.P.

                             By:      Lithotripters, Inc. sole general partner


                             By: ________________________________________
                                 ________________________________________
                                 (Type Name and Title)

                             [SIGNATURES CONTINUED ON FOLLOWING PAGE.]


                                                        14
<PAGE>


                              LITHOTRIPTERS, INC.


                              By: ________________________________________
                                  ________________________________________
                                  (Type Name and Title)


                                  TEXAS LITHO, INC.


                              By: ________________________________________
                                  ________________________________________
                                  (Type Name and Title)




                                                        15

<PAGE>






 


 


                                    SCHEDULES

                                 Relating to the

                          AGREEMENT AND PLAN OF MERGER

                                      among

                 TEXAS LITHOTRIPSY LIMITED PARTNERSHIP II L.P.,

                 TEXAS LITHOTRIPSY LIMITED PARTNERSHIP IV L.P.,

                       TEXAS ESWL/LASER LITHOTRIPTER, LTD.

                                       and

                 TEXAS LITHOTRIPSY LIMITED PARTNERSHIP VII, L.P.

                                September 4, 1998


 



ANY FACT OR MATTER  DISCLOSED IN ONE OR MORE SCHEDULES SHALL BE DEEMED DISCLOSED
FOR PURPOSES OF ALL  SCHEDULES,  WHETHER OR NOT  SPECIFICALLY  CROSS-REFERENCED.
CAPITALIZED TERMS USED HEREIN AND NOT OTHERWISE DEFINED HAVE THE SAME MEANING AS
IN THE  AGREEMENT TO WHICH THESE  SCHEDULES  ARE ATTACHED  AND  INCORPORATED  BY
REFERENCE.

<PAGE>

                                TABLE OF CONTENTS

                                                                            Page

SCHEDULE 2.01 - Defaults and Consents..........................................1

SCHEDULE 2.02 - Qualifications and Licenses....................................3

SCHEDULE 2.03 - Capitalization.................................................4

SCHEDULE 2.05 - Absence of Certain Changes....................................10

SCHEDULE 2.06 - Litigation....................................................11

SCHEDULE 2.07 - Property; Title...............................................12

SCHEDULE 2.09 - Contracts and Leases..........................................16

SCHEDULE 2.11 - Insurance.....................................................22

SCHEDULE 2.12 - Employees; Benefits...........................................26

 



                                                         i
<PAGE>

                                  SCHEDULE 2.01

                              Defaults and Consents


1. The vote of a prescribed portion of the outstanding limited partner interests
in each Merging  Partnership  is necessary  to authorize  the Merger.  Litho and
Texas Litho  interpret the agreement of limited  partnership for ESWL to require
the  vote  of  two-thirds  in  interest  of  the  ESWL  limited  partners.  Such
interpretation  is  reasonable  in the opinion of Litho and Texas Litho,  but an
argument can be made that a greater voting requirement  applies.  As of the date
of this Agreement,  no such claims are pending or, to the knowledge of Litho and
Texas Litho, threatened.

2. Consents must be obtained under the following lithotripsy services agreements
in connection with the Merger:

     a. Texas II

               i. Services  Agreement by and among Texas II and Harris Methodist
          Fort Worth,  Harris  Methodist  Southwest and Harris  Methodist  H-E-B
          dated May 1, 1997.

               ii.  Services  Agreement  by and between  Texas II and  Hillcrest
          Baptist Medical Center dates April 1, 1992.

               iii.  Services  Agreement  by and  between  Texas  II and  Irving
          Hospital  Authority  d/b/a  Irving  Healthcare  System dated August 9,
          1991.

               iv. Services  Agreement by and between Texas II and Health Trust,
          Inc.-The Hospital Company with respect to Northeast Community Hospital
          dated April 25, 1991.

               v.  Services  Agreement  by and between  Texas II and  Providence
          Health Center dated July 9, 1991.

     b. Texas IV

               i. None

     c. ESWL

               i.  Lithotripsy   Services  Agreement  between  ESWL  and  Angelo
          Community  Hospital  dated  July 8, 1992,  as amended by that  certain
          Amendment No. 1

                                                         1
<PAGE>


               to the Lithotripsy  Services Agreement regarding billing and user
          fees between ESWL and Angelo Community Hospital dated January 1, 1995.

     3. Consent must be obtained  under the following  lease in connection  with
     the Merger:

               a.  Vehicle  Lease  Service   Agreement  between  PACCAR  Leasing
          Corporation  and ESWL for 1996  Peterbilt  379 truck dated  October 9,
          1995.






                                                         2
<PAGE>

                                  SCHEDULE 2.02

                           Qualifications and Licenses


     1. Texas II

               a. Texas II was organized and conducts business in Texas.

               b. Texas II operates its lithotripter  equipment in Texas under a
          Certificate  of  Registration  for Industrial  Services  issued to its
          general  partner,  Lithotripters,  Inc.,  by the Texas  Department  of
          Health Bureau of Radiation Control which will expire on May 31, 2000.

     2. Texas IV
         
               a.  Texas IV was organized and conducts business in Texas.

               b. Texas IV operates its lithotripter  equipment in Texas under a
          Certificate  of  Registration  for Industrial  Services  issued to its
          general  partner,  Lithotripters,  Inc.,  by the Texas  Department  of
          Health Bureau of Radiation Control which will expire on May 31,  2000.
          Texas IV  currently  conducts no active  operations  in  Oklahoma  and
          therefore  has allowed  its  license  for the use of its  lithotripter
          equipment to lapse.

     3. ESWL

               a. ESWL was  organized  and conducts  business in Texas.  ESWL is
          qualified to conduct business in Oklahoma and Arkansas.

               b. ESWL  operates  its  lithotripter  equipment  in Texas under a
          Certificate of  Registration  for Industrial  Services issued to it by
          the Texas Department of Health Bureau of Radiation  Control which will
          expire on May 31,  2001. ESWL operates its  lithotripter  equipment in
          Oklahoma under a permit issued to it by the Oklahoma State  Department
          of Health  which  will  expire on  January 27,  1999.  ESWL  currently
          conducts no active  operations  in Arkansas and  therefore has allowed
          its license for the use of its lithotripter equipment to lapse.





                                                         3
<PAGE>


                                  SCHEDULE 2.03

                                 Capitalization


               1. Please see attachments.





                                                         4
<PAGE>



                                  SCHEDULE 2.03
                                    Texas II

                        PARTNERS AND PERCENTAGE INTERESTS
 
                                                             Percentage
General Partner                                               Interest

Lithotripters, Inc.                                          22.38810000%

Limited Partners

Thomas Arnold                                                 2.23880000
Charles Bamberger                                             2.98550000
Marc Barrett                                                  4.47760000
Philip Damstra                                                 .74660000
Jules Delaune                                                 1.11940000
Ruth Anne Winterringer Delaune                                1.11940000
Robert A. Dowling                                              .74660000
Wayne A. Hey                                                  1.49220000
Ira N. Hollander                                              3.35820000
Dan Johnson                                                   2.79850000
John Johnson                                                  1.11940000
Sid Jones                                                     2.23880000
Hugh Lamensdorf                                               2.23880000
Edward Lee                                                    2.23880000
Lithotripters, Inc.                                          29.10460000
Wade Lowry or Assignee                                        2.98550000
Dennis Ortiz                                                   .74660000
Gary Price or Assignee                                        1.11940000
Lillian Jordan Rawleigh                                       1.11940000
Donald M. Ross                                                1.11940000
James Saalfield                                               1.49220000
Martha Storrie                                                2.98550000
Mark Story                                                    3.91790000
Robert Stroud                                                  .74660000
Addison Thurman                                               2.23880000
Michael Walter                                                1.11940000





                                                         5
<PAGE>


                                  SCHEDULE 2.03
                                    Texas IV

                        PARTNERS AND PERCENTAGE INTERESTS


                                                             Percentage
General Partner                                               Interest

Lithotripters, Inc                                               20%
 
Limited Partners

Robert Admire                                                     2%
Mark Allen                                                        1%
Charles Bamberger                                                 1%
James Brady                                                       1%
Franklin Clark                                                    1%
J. Stephen Dryden                                                 1%
Richard Dulany                                                    1%
Christopher Fetner                                                4%
Larry Frank                                                       1%
Gerald Frankel                                                    4%
William Freeborn                                                  4%
Philip Gallina                                                    1%
William Grine                                                     1%
J. Scott Hassell                                                  2%
Joseph Jenkins                                                    1%
Thomas Jordan                                                     1%
William Jordan                                                    1%
Farid Khoury                                                      1%
Mario Labardini                                                   1%
Stephen Lieman                                                    3%
Lithotripters, Inc.                                              32%
Donald McKay                                                      3%
Thomas Mobley                                                     1%
Yondell Moore                                                     1%
Dan Myers                                                         1%
Estate of Roberto Olivares                                        1%
Anthony Rand                                                      1%
Estate of H. Edward Rietze                                        1%
James Saalfield                                                   1%


                                                         6
<PAGE>


Martha Storrie                                                    3%
Roger Stuart                                                      1%
W. Alan Terry                                                     1%




                                                         7
<PAGE>


                                                                  SCHEDULE 2.03
                                      ESWL

                        PARTNERS AND PERCENTAGE INTERESTS


                                                             Percentage
                                                              Interest
General Partner

Texas Litho, Inc.                                            18.50533808%

Limited Partners

Joyce Allen                                                   1.06761566
John S. Ballard, III                                          1.06761566
James Cochran                                                 4.62633452
Donald W. Cook                                                1.06761566
Stephen Corwin                                                1.06761566
Glenn Dunnington                                              1.06761566
Fifth Street Corp.                                            6.40569395
Alan Freeman                                                  1.06761566
Glen R. Goldsmith                                             1.06761566
A. Mason Holden                                               1.06761566
T.S. Kent                                                     1.06761566
J. L. LaManna, III                                            1.06761566
Barney Maddox                                                 1.06761566
William Mitchell                                              1.06761566
William L. Mulchin                                            1.06761566
Jerry A. Newton                                               1.06761566
Paris Urology Associates Pension Plan                         2.13523132
Allen Plotkin                                                 1.06761566
Richard Reese                                                 2.13523132
Jack S. Rice                                                  1.06761566
William Risk                                                  5.33807829
Southwest Lithotripter Partners, Ltd.                        28.82562278
John Barry Staub                                              1.06761566
Agif Syed                                                     1.06761566
Texas Litho Inc.                                              1.06761566
Arthur Tijernia                                               6.40569395
Eugene Todd                                                   2.13523132
R.D. West                                                     0.71174377


                                                         8
<PAGE>


Jeannie B. Westerburg                                         0.71174377
Robert H. Westerburg                                          0.71174377
Roger Wolfert                                                 1.06761566






                                                         9
<PAGE>


                                  SCHEDULE 2.05

                           Absence of Certain Changes


               1. Since July 1998, the Lithotripsy  Services  Agreement  between
               Hendrick Medical Center in Abilene,  Texas and ESWL has continued
               in effect on a  month-to-month  basis.  While no assurance can be
               given that such  efforts  will be  successful,  Hendrick  Medical
               Center and ESWL are currently in negotiations to enter into a new
               lithotripsy  services agreement for a new two-year term effective
               September 1, 1998. 








                                                        10
<PAGE>


                                  SCHEDULE 2.06

                                   Litigation


               1. None




                                                        11
<PAGE>


                                  SCHEDULE 2.07

                                 Property; Title

               1. Please see the attached  lists of the  Partnership  Assets for
               each Merging Partnership.

               2. Liens against each Merging Partnership.

                    a. Texas II

                         i. The  Certificate of Title for the 1991 Calumet Coach
                    still  shows  a lien  held  by  Siemens  Credit  Corporation
                    against the  vehicle  dated  August 8,  1991.  However,  the
                    obligation  underlying  the lien has been  satisfied and the
                    lien has been  released.  Proper  documentation  has not yet
                    been obtained and Texas II is  endeavoring to clear the lien
                    from the Certificate of Title.

                    b. Texas IV

                         i. None

                    c. ESWL

                         i. A UCC Financing  Statement was filed with the County
                    Clerk of Oklahoma  County,  Oklahoma on December  31,  1991.
                    This  financing  statement  covers  both a  Pulsolith  Laser
                    Lithotripter   and  1991  Ford  E150  Custom  Lift  Van  and
                    Accessories  and any proceeds of those items. A continuation
                    was filed at this location on October 17, 1996 which remains
                    in  effect.  However,  ESWL no  longer  owns the  underlying
                    property upon which the security interest is attached.  ESWL
                    is endeavoring to have the financing statement terminated by
                    Heller Financial, Inc., the secured party.





                                                        12
<PAGE>



                                                                   SCHEDULE 2.07

                                    Texas II

                               PARTNERSHIP ASSETS


1.       1991 Calumet Coach

2.       Siemens LithostarTM

3.       Sensimeter/380 Densitometer

4.       'C' Shock Tube

5.        Miscellaneous Equipment related to the provision of lithotripsy 
          services
<PAGE>



                                                                   SCHEDULE 2.07

                                    Texas IV

                               PARTNERSHIP ASSETS


1.       1981 Calumet Coach

2.       Siemens LithostarTM

3.       Dinamap Plus E CSA

4.       'C' Shock Tube

5.       Ohmeda Excel 110 Anesthesia System



                                                        14
<PAGE>


                                                                  SCHEDULE 2.07

                                      ESWL

                               PARTNERSHIP ASSETS


1.       1993 Calumet Trailer

2.       1998 Mercury Mystique

3.       1996 Ford Taurus

4.       Dornier MFL 5000 Lithotripter

5.       Ohmeda Excel Anesthesia System

6.       X-Ray Processor.

7.       Sogevac Vacuum Pump

8.       Critikon 1846 Dinamap NIBP (automated blood pressure cuff) monitor

9.       M310 ECG Simulator

10.      Miscellaneous computer and office equipment




                                                        15
<PAGE>

                                  SCHEDULE 2.09

                              Contracts and Leases


I.       Contracts

         a.       Texas II

          1. Services  Agreement by and between Texas II and Arlington  Memorial
          Hospital dated November 21, 1993.  Letter Agreement  amending original
          agreement  by and between  Texas II and  Arlington  Memorial  Hospital
          dated January 9, 1998.

          2. Services  Agreement by and among Texas II and Harris Methodist Fort
          Worth, Harris Methodist Southwest and Harris Methodist H-E-B dated May
          1, 1997.

          3. Services  Agreement by and between Texas II and HCA South Arlington
          Hospital dated August 14, 1991.

          4. Services  Agreement by and between  Texas II and Hillcrest  Baptist
          Medical Center dates April 1, 1992.

          5.  Services  Agreement  by and between  Texas II and Irving  Hospital
          Authority d/b/a Irving Healthcare System dated August 9, 1991.

          6. Services Agreement by and between Texas II and Metroplex  Surgicare
          dated June 6, 1995.

          7.  Services  Agreement  by and  between  Texas II and Health  Trust ,
          Inc.-The Hospital Company with respect to Northeast Community Hospital
          dated April 25, 1991.

          8. Services  Agreement by and between Texas II and  Providence  Health
          Center dated July 9, 1991.

         b.       Texas IV

          1.  Services  Agreement  by and  between  Texas  IV and  Titus  County
          Memorial Hospital dated January 1, 1993 .


                                                        16
<PAGE>




          2.  Services  Agreement  by and  between  Texas IV and  Texas  Surgery
          Center, Ltd. dated May 20, 1998.

          3. Services  Agreement by and between  Texas IV and Baylor  University
          Medical Center dated May 20, 1998.

          4. Services  Agreement by and between  Texas IV and Bethania  Regional
          Hospital Care Center dated November 9, 1992.

          5.  Services  Agreement by and between  Texas IV and Columbia  Medical
          Center of Plano dated July 19, 1996.

          6.  Services  Agreement by and between  Texas IV and  Harrison  County
          Hospital  Association  d/b/a Marshall  Memorial Hospital dated January
          26, 1996.

          7. Services Agreement by and between Texas IV and HCA Denton Community
          Hospital dated June 23, 1992 .

          8.  Services  Agreement  by and between  Texas IV and HMA Durant d/b/a
          Medical Center of Southeastern Oklahoma dated March 16, 1994. Addendum
          to the Services Agreement by and between Texas IV and HMA Durant d/b/a
          Medical  Center  of   Southeastern   Oklahoma   amending   termination
          provisions of the Services Agreement (not dated).

          9.  Services  Agreement  by and  between  Texas IV and  Medical  Plaza
          Hospital dated July 17, 1992.

          10. Services  Agreement by and between Texas IV and Methodist Hospital
          of Dallas d/b/a Methodist Medical Center dated December 3, 1992.

          11. Services Agreement by and between Texas IV and North Texas Medical
          Center dated July 1, 1992.

          12.  Services  Agreement  by and  between  Texas  IV and  Presbyterian
          Hospital  of  Plano  dated  [September]  1,  1993.  Addendum  I to the
          Services  Agreement by and between Texas IV and Presbyterian  Hospital
          of Plano regarding personnel records of employees dated April 8, 1994.
          Addendum II to the  Services  Agreement  by and  between  Texas IV and
          Presbyterian Hospital of Plano regarding contract services dated April
          8, 1994.


                                                        17
<PAGE>



          13. Services Agreement by and between Texas IV and Richardson Hospital
          Authority d/b/a Richardson Medical Center dated July 1, 1992. Addendum
          to the  Services  Agreement  by and  between  Texas IV and  Richardson
          Hospital   Authority  d/b/a   Richardson   Medical  Center   regarding
          inspection, maintenance and proper licensure of the lithotripter coach
          by Texas IV (not dated).

          14.  Services  Agreement by and between  Texas IV and St. Paul Medical
          Center  dated  October  15,  1992.  First  Amendment  to the  Services
          Agreement  by  and  between  Texas  IV and  St.  Paul  Medical  Center
          regarding payments to Texas IV dated July 1, 1993.

         c.       ESWL

          1. Lithotripsy  Services  Agreement between Columbia Medical Center of
          Plano and ESWL dated December 27, 1996.

          2. Lithotripsy  Services Agreement between Walls Regional Hospital and
          ESWL dated September 18, 1995.  Addendum to the  Lithotripsy  Services
          Agreement   between  Walls   Regional   Hospital  and  ESWL  regarding
          maintenance  and  monitoring  of quality  improvement  programs  dated
          September 19, 1995.

          3. Lithotripsy  Services  Agreement between Columbia Medical Center at
          Lewisville and ESWL dated December 16, 1996.

          4.  Lithotripsy   Services   Agreement  between  Tenet  Health  System
          Hospitals  Dallas,  Inc. d/b/a RHD Memorial Medical Center and Trinity
          Medical  Center  and ESWL  dated  October  1,  1996.  Addendum  to the
          Lithotripsy  Services  Agreement between Tenet Health System Hospitals
          Dallas,  Inc. d/b/a RHD Memorial  Medical  Center and Trinity  Medical
          Center and ESWL providing for a new effective date of February 1, 1998
          and a new one-year term dated March 6, 1998.

          5. Agreement for Mobile Laser  Lithotripsy  Services  between ESWL and
          Wilson N. Jones Hospital dated June 1, 1993.

          6.  Agreement  for Mobile  Lithotripsy  Services  between Maxum Health
          Corp.  And  Wichita  General  Hospital  dated June 15,  1990.  Pricing
          Addendum for Mobile  Lithotripsy  Services  between Maxum Health Corp.
          and Wichita General Hospital dated May 11, 1994.  Assignment Agreement
          between Maxum Health Corp. and Wichita General Hospital  assigning all
          rights,


                                                        18
<PAGE>



          duties  and   obligations   of  Maxum  Health  Corp.   to  ESWL  dated
          September 1, 1991.

          7. Agreement for Mobile Laser  Lithotripsy  Services  between ESWL and
          Waco Surgical Center, Ltd. dated January 14, 1993.

          8. Lithotripsy  Services  Agreement between Valley View Surgery Center
          and ESWL dated May 10, 1996.

          9.  Agreement  for Mobile  Lithotripsy  Services  between ESWL and NME
          Hospitals, Inc. d/b/a Trinity Medical Center dated June 7, 1994.

          10. Agreement for Mobile  Lithotripsy  Services  (Revision #2) between
          ESWL and Texoma  Medical Center dated June 1, 1993.  Letter  Agreement
          between ESWL and Texoma Medical Center  amending  Schedule A regarding
          user fees dated June 6, 1997.

          11. Lithotripsy Services Agreement between Terrell Community Hospital,
          Inc. d/b/a Columbia Medical Center at Terrell and ESWL dated March 18,
          1997.

          12.  Agreement for Mobile  Lithotripsy  Services  between ESWL and St.
          Joseph's  Hospital and Health Center dated  January 14, 1993.  Pricing
          Addendum for Mobile Lithotripsy Services between ESWL and St. Joseph's
          Hospital and Health Center dated May 11, 1994.

          13. Lithotripsy  Services Agreement between  Presbyterian  Hospital of
          Kaufman and ESWL dated February 22, 1996.

          14.  Lithotripsy  Services  Agreement between Jane Phillips  Episcopal
          Memorial Medical Center and ESWL dated July 1, 1996.

          15. Agreement for Mobile  Lithotripsy  Equipment between VHA Southwest
          Litho I, Ltd. and Memorial  Hospital and Medical  Center f/k/a Midland
          Memorial  Hospital dated March 1, 1988.  Assignment  Agreement between
          Memorial  Hospital and ESWL  assigning VHA  Southwest  Litho I, Ltd.'s
          rights under the original agreement to ESWL dated  September 1,  1991.
          Addendum to Agreement for Mobile Lithotripsy Services between Memorial
          Hospital and ESWL dated April 16,  1998. Notice of termination of this
          agreement  was  received  by ESWL on  April 16,  1998 to be  effective
          December 9,  1998.  While no assurance  can be given that such efforts
          will be successful, ESWL


                                                        19
<PAGE>


          is presently attempting to renegotiate a renewal or new agreement with
          Memorial Hospital and Medical Center.

          16.  Lithotripsy Use Agreement between Memorial  Hospital  (Palestine,
          Texas) and ESWL dated November 30, 1995.

          17. Lithotripsy Services Agreement between McCuistion Regional Medical
          Center and ESWL dated August 13, 1996.

          18. Lithotripsy Services Agreement between Hendrick Medical Center and
          ESWL dated June13, 1996.

          19.  Lithotripsy  Services  Agreement between Columbia North Hills and
          ESWL dated April 8,  1996.  First  Amendment to  Lithotripsy  Services
          Agreement  regarding  user  fees and a new  term  between  HCA  Health
          Services  of Texas,  Inc.  d/b/a  North Hill  Hospital  and ESWL dated
          February  1, 1997.  Amendment  between  Columbia  North Hills and ESWL
          regarding Medicare access,  independent  contractor status,  insurance
          coverage,  quality  standards and  confidentiality  dated  December 1,
          1997.

          20.  Agreement  for  Mobile  Lithotripsy  Services  between  ESWL  and
          Columbia HCA Navarro  Regional  Hospital  dated April 1, 1995.  Letter
          amending  original  agreement  between  ESWL and  Columbia HCA Navarro
          Regional Hospital extending  contract on a month-to-month  basis dated
          June 21, 1996.  While no assurance can be given that such efforts will
          be  successful,  ESWL  is  presently  attempting  to  negotiate  a new
          agreement  for an  initial  term of at  least  one year  with  Navarro
          Regional.

          21.  Lithotripsy   Services  Agreement  between  Tenet  Health  System
          Hospitals Dallas,  Inc. d/b/a Doctors Hospital,  Dallas and ESWL dated
          April 1, 1997.  Letter  Agreement  renewing the  existing  Lithotripsy
          Services Agreement between Tenet Health System Hospitals Dallas,  Inc.
          d/b/a Doctors Hospital, Dallas and ESWL dated March 20, 1998.

          22. Revised Agreement for Mobile Lithotripsy Services between ESWL and
          Dallas-Fort Worth Medical Center dated June 1, 1993.

          23.   Lithotripsy   Services   Agreement   between   Columbia  Medical
          Center/Dallas  Southwest  and ESWL dated March 15, 1996.  Amendment to
          the  Lithotripsy   Services   Agreement   regarding  Medicare  access,
          independent contractor

                                                        20
<PAGE>



          status,   indemnification  and  assignment  between  Columbia  Medical
          Center/Dallas Southwest and ESWL dated March 15, 1996.

          24. Agreement for Mobile Lithotripsy Services between ESWL and DeQueen
          Health Services,  Inc. d/b/a Community  Hospital of DeQueen dated July
          8, 1992. Pricing Addendum for Mobile Lithotripsy Services between ESWL
          and DeQueen Health Services,  Inc. d/b/a Community Hospital of DeQueen
          dated May 11, 1994.

          25.  Lithotripsy  Services Agreement between ESWL and Angelo Community
          Hospital  dated  July 8,  1992.  Amendment  No.  1 to the  Lithotripsy
          Services  Agreement  regarding  billing and user fees between ESWL and
          Angelo Community Hospital dated January 1, 1995.

     d.  Each  of  the  Merging   Partnerships   participates  in  reimbursement
     arrangements  pursuant to agreements the General  Partner has with national
     and local  payors.  See the  section of the  Offering  Memorandum  entitled
     "Proposed  Activities  -  Operations  of  Merging  Partnerships  -  Service
     Agreements - Reimbursement Agreements. 

II.      Leases

         a.       Texas II

                  1.       None

         b.       Texas IV

                  1.       None

         c.       ESWL

                    1. Vehicle Lease Service  Agreement  between  PACCAR Leasing
                    Corporation  and ESWL for 1996  Peterbilt  379  truck  dated
                    October 9, 1995.





                                                        21
<PAGE>


                                  SCHEDULE 2.11

                                    Insurance


          1.  Insurance  policies for each Merging  Partnership  are  maintained
     through blanket insurance policies with Prime Medical Services,  Inc. Prime
     Medical  Services,  Inc. is the corporate parent of Litho, the sole general
     partner of both Texas II and Texas IV, and Texas  Litho,  the sole  general
     partner of ESWL. See the attached list of insurance policies  maintained by
     Prime Medical Services, Inc. which insure the Merging Partnerships.




                                                        22

<PAGE>



                                  SCHEDULE 2.11
                               INSURANCE POLICIES
<TABLE>
<S>                 <C>                    <C>             <C>         <C>         <C>    

                                                                               
     TYPE              CARRIER             POLICY           TERM       DEDUCTIBLE           LIMITS                    PREMIUM
     ----              -------             ------           ----       ----------           ------                    -------
                                           NUMBER
                                           ------
Commercial Crime    National Union Fire    484-29-38       10/30/96    $10,000            $1,000,000                  [Unspecified]
                    Insurance Company of                     to
                    Pittsburgh, PA                         10/30/97

Workers             American Protection    3BR 011735-00   10/31/97    None        Per Accident Limit - $1,000,000    $42,585 (est.)
Compensation and     Insurance Company                       to                    Disease Each Employee Limit -
Employer's                                                 10/31/98                       $1,000,000
Liability                                                                          Disease Per Policy Limit - $1,000,00

Business            American Motorists     F3R 028308-00   10/31/97    $1000 per    Comprehensive - $30,000           $17,004 (est.)
Automobile          Insurance Company                        to          vehicle    Collision - $30,000                    
                                                           10/31/98                 Combined Liability - $1,000,000
                                                                                    Auto Medical Payments - $5,000
                                                                                    Uninsured/Underinsured Motorists -
                                                                                       $1,000,000

</TABLE>


                                                                 23
<PAGE>

<TABLE>
<S>                  <C>                   <C>              <C>         <C>        <C> 

                                                                                    
          TYPE          CARRIER             POLICY          TERM        DEDUCTIBLE LIMITS                                PREMIUM
          ----          -------             ------          ----        -----------------                                -------
                                            NUMBER
                                            ------
Commercial Inland    General Accident      CIM 0448425-00   10/31/96       None    Mobile Coaches, Vans & Trailers -     $97,209
Marine               Insurance Company                        to                   $59,011,500(est.)
                     of America                             10/31/97               Fixed Site Litho Units & Medical
                                                                                   Equipment - $6,040,100
                                                                                   Business Interruption for all
                                                                                   Litho units - $12,322,000
                                                                                   Service Trucks & Tractors - $1,347,904
                                                                                   Off-Premises Utility Failure - $1,000,000
                                                                                   Personal Property of others - $500,000
                                                                                   EDP Media & Hardware - $310,000
                                                                                   Extra Expense - $250,000
                                                                                   Other Transit - $100,000
                                                                                   Real & Personal Property - $4,840,100

Commercial        American Manufacturers   3AE 663 383-00   10/31/97   $25,000 per    Mobile Equipment - $59,511,500    $96,637
Output Program    Mutual Insurance                            to       earthquake     Buildings & Business Personal         (est.)
                  Company                                   10/31/98   or flood       Property - $10,880,200
                                                                       occurrence     Income - $12,572,000

                                                                       $5,000 per     Pollutant Clean-up and Removal -
                                                                       vehicle          $250,000
                                                                       24 hrs. for     Accounts Receivable - $250,000
                                                                       utility         Property in Transit - $100,000
                                                                       interruption    Valuable Papers & Records - $250,000

                                                                       $25,000 for       Utility interruption/property damage -
                                                                       all other         $1,000,000
                                                                       covered perils    Earthquake - $2,500,000

</TABLE>


                                                                 24
<PAGE>
<TABLE>
<S>              <C>                  <C>               <C>        <C>         <C> 

                                                                                    
  TYPE            CARRIER             POLICY            TERM       DEDUCTIBLE  LIMITS                                        PREMIUM
  ----            -------             ------            ----       ----------  ------                                        -------
                                      NUMBER
                                      ------
Health Care      Columbia Casualty    HMH 1028627495-1  10/30/97   None Shown  Professional Liability - $1,000,000 per       $25,348
[Professional    Company                                  to                   person; $3,000,000 total limit                 (est.)
and General                                             10/30/98               General Liability - $1,000,000 per
Liability]Policy                                                               occurrence; $2,000,000 general aggregate
                                                                               limit; $2,000,000 products/completed
                                                                               operations aggregate; $50,000 damage
                                                                               limit per fire; $1,000,000
                                                                               personal/advertising injury limit


</TABLE>




                                                                 25
<PAGE>


                                  SCHEDULE 2.12

                               Employees; Benefits

1.       Employee List

         a.       Texas II

                           Name                                   Title

                  i.       Carylane B. Bogan           Radiologic Technician
                  ii.      Dale F. Cuthbertson         Licensed Registered Nurse
                  iii.     Donna I. Hardt              Registered Nurse
                  iv.      Christopher I. Laskey       Radiologic Technician

         b.       Texas IV

                           Name                                   Title

                  i.       Susan F. Adkisson           Registered Nurse
                  ii.      Carla C. Dooley             Radiologic Technician
                  iii.     Mary Ann Elder              Radiologic Technician
                  iv.      Susan Ann Hatfield          Registered Nurse

         c.       ESWL

                           Name                                   Title

                  i.       Terry B. Guthrie            Radiologic Technician
                  ii.      William C. Mason, II        Driver
                  iii.     Gregory P. Starr            Project Manager
                  iv.      Jack C. Ward                Driver

2.       See the attached summary of employee benefits.







                                                        26
<PAGE>

                                  SCHEDULE 2.12

                          Summary of Employee Benefits

All active  full-time  employees  of the Merging  Partnerships  are  eligible to
participate in the benefit plans of Prime Medical Services, Inc. ("Prime"),  the
parent company of the general  partner of all of the Merging  Partnerships.  The
following is a brief summary of these benefit plans:

1.  Insurance  -  Prime  provides  medical  and  dental  insurance,   long  term
disability,  accidental death and dismemberment, and life insurance. There is an
employee  contribution  for this benefit which varies depending upon the marital
status and number of dependents of the employee.

2. 125-Cafeteria Plan - Prime offers a 125-Cafeteria Plan to employees after six
months of employment,  which includes dependent care, medical  reimbursement and
insurance premiums.

3. 401(k)  Retirement Plan - Prime offers employees an opportunity to contribute
to a 401(k)  retirement  plan after the  completion of six months of employment.
Prime, in its sole discretion, makes a decision to contribute a matching portion
in Prime common stock at the end of each year.

4. Holidays - There are nine paid holidays per year.

5. Sick leave,  vacation - The sick leave and vacation  benefits vary  depending
upon  the  work  schedule  of the  employee.  Certain  employees  have  flexible
schedules  which  do not  require  them  to work a  consistent  5 day  week  and
therefore do not accumulate vacation and sick leave.

6. Bonus Plan - see attached memo.

In addition to the above, there are miscellaneous  benefits such as bereavement,
military reserves, jury duty and an educational assistance plan.
 


                                                        27
<PAGE>






                        AGREEMENT OF LIMITED PARTNERSHIP


                                       OF

                BIG SKY UROLOGICAL SERVICES LIMITED PARTNERSHIP



<PAGE>

                                    AGREEMENT
                             OF LIMITED PARTNERSHIP
                                       OF
                 BIG SKY UROLOGICAL SERVICES LIMITED PARTNERSHIP


                                TABLE OF CONTENTS

                                                                    Page

         1.       FORMATION...........................................1

         2.       NAME................................................1

         3.       OFFICES.............................................1

         4.       PURPOSE.............................................2

         5.       TERM................................................2

         6.       CERTAIN DEFINED TERMS...............................2

         7.       CAPITAL CONTRIBUTIONS AND DILUTION OFFERINGS........6

         8.       GUARANTIES..........................................7

         9.       CONDITIONS TO THE CAPITAL CONTRIBUTIONS OF CERTAIN LIMITED
                  PARTNERS............................................7

         10.      REPRESENTATIONS, WARRANTIES AND COVENANTS OF THE GENERAL
                  PARTNER.............................................7

         11.      ADMISSION OF LIMITED PARTNERS.......................8

         12.      CAPITAL ACCOUNTS....................................9

         13.      ALLOCATIONS........................................10

         14.      DISTRIBUTIONS......................................11

         l5.      RIGHTS AND OBLIGATIONS OF LIMITED PARTNERS.........11

         16.      LIMITED LIABILITY..................................13

         17.      TRANSFER OF INTERESTS AND ADMISSION OF PARTNERS....14


                                        i
<PAGE>
 
         18.      OPTIONAL PURCHASE OF LIMITED PARTNERSHIP INTERESTS ON CERTAIN
                  EVENTS....................................................18

         19.      SALE, ASSIGNMENT OR OTHER TRANSFER OF THE GENERAL PARTNER'S
                  INTEREST..................................................22

         20.      TERMINATION OF THE SERVICES OF THE GENERAL PARTNER........23

         21.      MANAGEMENT AND OPERATION OF BUSINESS......................23

         22.      RESERVES..................................................26

         23.      INDEMNIFICATION AND EXCULPATION OF THE GENERAL PARTNER....27

         24.      DISSOLUTION OF THE PARTNERSHIP............................27

         25.      DISTRIBUTION UPON DISSOLUTION.............................28

         26.      BOOKS OF ACCOUNT, RECORDS AND REPORTS.....................29

         27.      NOTICES...................................................30

         28.      AMENDMENTS................................................30

         29.      LIMITATIONS ON AMENDMENTS.................................31

         30.      MEETINGS, CONSENTS AND VOTING.............................31

         31.      SUBMISSIONS TO THE LIMITED PARTNERS.......................32

         32.      ADDITIONAL DOCUMENTS......................................32

         33.      SURVIVAL OF RIGHTS........................................32

         34.      INTERPRETATION AND GOVERNING LAW..........................32

         35.      SEVERABILITY..............................................32

         36.      AGREEMENT IN COUNTERPARTS.................................32

         37.      THIRD PARTIES.............................................33

         38.      POWER OF ATTORNEY.........................................33


                                       ii
<PAGE>

         39.      ARBITRATION...............................................33

         40.      CREDITORS.................................................34


                                    SCHEDULES

Schedule A  -  Schedule of Partnership Interests


                                       iii
<PAGE>

THE LIMITED PARTNERSHIP INTERESTS REPRESENTED BY THIS LIMITED
PARTNERSHIP AGREEMENT HAVE NOT BEEN REGISTERED WITH THE
SECURITIES AND EXCHANGE COMMISSION UNDER THE SECURITIES ACT OF
1933, AS AMENDED, UNDER THE SECURITIES ACT OF MONTANA, AS AMENDED,
OR UNDER SIMILAR LAWS OR ACTS OF OTHER STATES IN RELIANCE UPON
EXEMPTIONS UNDER SUCH LAWS.  IN ADDITION, NO TRANSFERS OF LIMITED
PARTNERSHIP INTERESTS MAY BE MADE WITHOUT COMPLIANCE WITH THE
RESTRICTIONS SET FORTH IN ARTICLE 17 BELOW.

                                    AGREEMENT
                             OF LIMITED PARTNERSHIP
                                       OF
                           BIG SKY UROLOGICAL SERVICES
                               LIMITED PARTNERSHIP


     THIS  AGREEMENT  OF LIMITED  PARTNERSHIP  (the  "Agreement")  is made as of
December 2, 1998,  by and among SUN MEDICAL  TECHNOLOGIES,  INC.,  a  California
corporation  and a wholly-owned  subsidiary of Prime Medical  Services,  Inc., a
Delaware  corporation (the "General Partner"),  and persons listed on Schedule A
attached hereto as the Limited Partners.
 
1. FORMATION.

     The  Partnership  was  formed  pursuant  to the filing in the Office of the
Secretary  of State of Montana on or about August 31, 1998 of a  Certificate  of
Limited Partnership in accordance with the provisions of the Act.

2. NAME.

     2.1 The name of the  Partnership  is "Big Sky Urological  Services  Limited
Partnership."

     2.2 The  Partnership  business  shall be conducted  under such names as the
General Partner may from time to time deem necessary or advisable, provided that
appropriate  amendments  to this  Agreement  and  all  necessary  filings  under
applicable assumed or fictitious name statutes or the Act are first obtained.

3. OFFICES.

     3.1 The  principal  office of the  Partnership  shall be at 1301 Capital of
Texas Highway,  Suite C-300,  Austin, Texas 78746, or at such other place as the
General  Partner  may,  from time to time,  designate  by notice to the  Limited
Partners (the "Records Office").



                                       -1-
<PAGE>

     3.2 The Partnership may have such additional offices as the General Partner
may, from time to time, deem necessary or advisable.

4. PURPOSE.

     The purpose and  business of the  Partnership  shall be: (i) to acquire and
operate  one or more  transportable  lithotripters  (or any  other  renal  stone
treatment equipment) for the treatment of renal stones primarily in the areas of
Great Falls, Helena, Butte, Bozeman, Missoula and Kalispell, Montana, or in such
other location(s) as the General Partner may determine,  in its sole discretion,
to be in the best interests of the  Partnership;  (ii) to acquire and operate in
the  future  any other  urological  device  or  equipment;  provided,  that such
equipment  as of the date of  acquisition  by the  Partnership  has received FDA
premarket  approval;  (iii) to  acquire  an  interest  in any  business  entity,
including, without limitation, a limited partnership,  limited liability company
or corporation,  that engages in any business activity described in this Article
4; and (iv) to engage in any and all  activities  incidental  or  related to the
foregoing, upon and subject to the terms and conditions of this Agreement.

5. TERM.

     The  Partnership  shall  terminate  on  December 31,  2048,  unless  sooner
terminated as herein provided.

6. CERTAIN DEFINED TERMS.

     Certain terms used in this Agreement shall have the following meanings:

     Act. The Act means the Montana Uniform Limited  Partnership Act, as then in
effect.

     Affiliate.  An  Affiliate  is  (i) any  person,  partnership,  corporation,
association or other legal entity ("person") directly or indirectly controlling,
controlled  by or under  common  control with another  person;  (ii) any  person
owning or controlling  10% or more of the  outstanding  voting  interest of such
other person; (iii) any officer, director or partner of such person; and (iv) if
such other person is an officer,  director or partner, any entity for which such
person acts in such capacity.

     Agreement.  This  Agreement  of  Limited  Partnership,  as the  same may be
amended from time to time.

     Bank. First Citizens Bank & Trust Company.

     Capital Account.  The Partnership  capital account of a Partner as computed
pursuant to Article 12 of this Agreement.



                                       -2-
<PAGE>

     Capital  Contributions.  All capital contributions made by a Partner or his
or  her  predecessor  in  interest  which  shall  include,  without  limitation,
contributions made pursuant to Article 7 of this Agreement.

     Capital  Transaction.  Any transaction which, were it to generate proceeds,
would produce Partnership Sales Proceeds or Partnership Refinancing Proceeds.

     Code.  The Internal  Revenue  Code of 1986,  as amended,  or  corresponding
provisions of subsequent, superseding revenue laws.

     Dilution Offering. As provided in Article 7.4 of this Agreement, the future
offering of  additional  limited  partnership  interests in the  Partnership  as
determined by the General Partner.  Except as otherwise provided in Article 7.4,
any  successful  Dilution  Offering will  proportionately  reduce the Percentage
Interests of the then current Partners in the Partnership.

     Domestic Proceeding. Any divorce, annulment, separation or similar domestic
proceeding between a married couple.

     Equipment.  The equipment used in the operation of the Lithotripter System,
including the mobile  transport  vehicle,  the  transportable  lithotripter  and
miscellaneous  medical  equipment  and  supplies,  and  any  similar  additional
equipment acquired by the Partnership in the future.

     FDA. The United States Food and Drug Administration.

     General  Partner.  The  general  partner of the  Partnership,  Sun  Medical
Technologies,  Inc., a California  corporation and a wholly-owned  subsidiary of
Prime Medical Services, Inc., a Delaware corporation.

     Guaranty.  The Guaranty  Agreement  pursuant to which each Limited  Partner
will guarantee a portion of the Partnership's  obligations to the Bank under the
Loan. The form of the Guaranty Agreement is included in the Subscription  Packet
accompanying the Memorandum.

     Initial  Limited  Partner.  Stan  Johnson,  a resident  of  Arizona  and an
Affiliate of the General Partner.  The Initial Limited Partner is to be the only
limited partner of the Partnership  until such time as the new Limited  Partners
are admitted to the Partnership, at which time the Initial Limited Partner shall
withdraw from the Partnership.
 
     Limited  Partners.  The Limited  Partners are those  investors in the Units
admitted to the  Partnership  and any person  admitted  as a Limited  Partner in
accordance with the provisions of this Agreement.



                                       -3-
<PAGE>

     Lithotripter.  The extracorporeal shock-wave lithotripter to be acquired by
the Partnership and any replacements therefor or additional  lithotripters to be
purchased by the Partnership.

     Lithotripter   System.   The  mobile  transport   vehicle  and  operational
Lithotripter.

     Loan.  The loan of up to $450,000  from the Bank to the  Partnership.  Loan
proceeds  will be used  by the  Partnership  to (i)  acquire  an  extracorporeal
shockwave lithotripter with options (up to $400,000), and (ii) acquire and upfit
a mobile van to transport the lithotripter (up to $50,000).

     Losses.  The net loss (including Net Losses from Capital  Transactions)  of
the  Partnership  for each Year of the  Partnership  as  determined  for federal
income tax purposes.

     Majority in Interest of the Limited Partners. The Limited Partners who hold
more than 50% of the Percentage Interests in the Partnership held by the Limited
Partners.

     Memorandum.   The  Confidential   Private   Placement   Memorandum  of  the
Partnership dated October 5, 1998, as amended or as supplemented.

     Mobile Kidney Stone.  Mobile  Kidney Stone Centers of  California,  Ltd., a
California limited partnership and an Affiliate of the General Partner.

     Net Gains from Capital Transactions.  The gains realized by the Partnership
as a result of or upon any sale, exchange,  condemnation or other disposition of
the  capital  assets  of  the  Partnership  (which  assets  shall  include  Code
Section 1231 assets) or as a result of or upon the damage or destruction of such
capital assets.

     Net  Losses  from  Capital   Transactions.   The  losses  realized  by  the
Partnership  as a result of or upon any sale,  exchange,  condemnation  or other
disposition of the capital assets of the  Partnership  (which shall include Code
Section 1231 assets) or as a result of or upon the damage or destruction of such
capital assets.

     Offering.  The offer to  potential  investors  of 99 Units  pursuant to the
Memorandum.

     Partners. The General Partner and the Limited Partners, collectively, where
no distinction is required by the context in which the term is used herein.

     Partnership.  Big Sky Urological  Services Limited  Partnership,  a Montana
limited partnership.

     Partnership Cash Flow. For the applicable  period,  the excess,  if any, of
(A) the sum of (i) all  gross  receipts  from any source for such period,  other
than from Partnership loans, Capital Transactions and Capital Contributions, and
(ii) any funds released by the Partnership from


                                       -4-
<PAGE>

     previously established reserves,  over (B) the sum of (i) all cash expenses
paid by the  Partnership  for such  period;  (ii) the  amount of all payments of
principal  on  loans  to  the  Partnership;  (iii) capital  expenditures  of the
Partnership; and (iv) such reasonable reserves as the General Partner shall deem
necessary or prudent to set aside for future repairs,  improvements or equipment
replacement or additions, or to meet working capital requirements or foreseen or
unforeseen future  liabilities and  contingencies of the Partnership;  provided,
however,  that the amounts referred to in (B)(i),  (ii) and (iii) above shall be
taken into account only to the extent not funded by Capital Contributions, loans
or paid out of previously established reserves. Such term shall also include all
other funds deemed  available for  distribution  and designated as  "Partnership
Cash Flow" by the General Partner.

     Partnership  Interest.  The  interest  of a Partner in the  Partnership  as
defined by the Act and this Agreement.

     Partnership Refinancing Proceeds. The cash realized from the refinancing of
Partnership assets after retirement of any secured loans and less (i) payment of
all  expenses  relating  to  the  transaction  and  (ii) establishment  of  such
reasonable  reserves as the General  Partner shall deem  necessary or prudent to
set  aside  for  future  repairs,  improvements,  or  equipment  replacement  or
additions,  or to meet working  capital  requirements  or foreseen or unforeseen
future liabilities or contingencies of the Partnership.

     Partnership  Sales  Proceeds.  The cash realized  from the sale,  exchange,
casualty or other  disposition of all or a portion of  Partnership  assets after
the  retirement  of all secured  loans and less (i) the  payment of all expenses
related to the transaction and (ii) establishment of such reasonable reserves as
the  General  Partner  shall deem  necessary  or prudent to set aside for future
repairs, improvements, or equipment replacement or additions, or to meet working
capital   requirements   or  foreseen  or  unforeseen   future   liabilities  or
contingencies of the Partnership.

     Percentage Interest. The interest of each Partner in the Partnership, to be
determined initially in the case of a Limited Partner by reference to his or her
Unit  ownership  based  upon the  Limited  Partners  holding  an  aggregate  99%
Percentage Interest in the Partnership, with each initial Unit sold representing
an initial 1% interest.  The General  Partner will initially own a 1% Percentage
Interest in the Partnership. A Partner's Percentage Interest may be reduced by a
future Dilution Offering.  The Partners' Percentage Interests in the Partnership
as of the date hereof are as set forth in Schedule A attached hereto. Any future
adjustments  in the  Partners'  Percentage  Interests,  due to  future  Dilution
Offerings or otherwise, will also be reflected by amendments to Schedule A.

     Profit. The net income of the Partnership (including Net Gains from Capital
Transactions)  for each Year of the Partnership as determined for federal income
tax purposes.

     Pro Rata Basis.  In  connection  with an  allocation  or  distribution,  an
allocation or distribution in proportion to the respective  Percentage Interests
of the class of Partners to which reference is made.



                                       -5-
<PAGE>

     Sales Agency  Agreement.  The sales agency agreement  through which MedTech
Investments,  Inc.,  an  Affiliate  of the General  Partner and a  broker-dealer
company  registered with the Securities and Exchange  commission and a member of
the National  Association of Securities  Dealers,  Inc. shall offer and sell the
limited partnership interest of the Partnership pursuant to the Memorandum.

     Sales  Commission.  The $100 sales commission paid to MedTech  Investments,
Inc. for each Unit sold.

     Service. The Internal Revenue Service.

     Units.  The 99 equal limited partner  interests in the Partnership  offered
pursuant  to the  Memorandum  for a price  per Unit of  $1,500  in cash,  plus a
personal guaranty of 1% of the  Partnership's  obligations under the Loan (up to
$4,500 principal guaranty obligation).

     Year. An annual accounting period ending on December 31 of each year during
the term of the Partnership.

7. CAPITAL CONTRIBUTIONS AND DILUTION OFFERINGS.

     7.1 General Partner Contribution.  On or before the date of this Agreement,
the General Partner will  contribute to the capital of the  Partnership  cash in
the  amount  equal to 1% (up to $1,500)  of the total  cash  contributed  to the
Partnership by the Partners in the offering made pursuant to the Memorandum.

     7.2 Limited  Partner  Contribution.  Each Limited  Partner hereby agrees to
contribute and shall contribute to the capital of the Partnership on the date of
his or her admission to the  Partnership  the cash amount set forth opposite his
or her name on Schedule A attached hereto.

     7.3 No Interest.  Except as otherwise provided herein, no interest shall be
paid on any contribution to the capital of the Partnership.

     7.4 Dilution  Offerings.  If the General  Partner,  in its sole discretion,
determines  that it is in the best  interest  of the  Partnership,  the  General
Partner may, from time to time,  offer, sell and issue, for and on behalf of the
Partnership,  additional  limited  partnership  interests in the  Partnership (a
"Dilution   Offering")  to  investors  who  are  not  already  Limited  Partners
("Qualified  Investors").  The primary purpose of any Dilution Offering would be
to raise additional capital for any legitimate  Partnership purpose as set forth
in Article 4. Any limited partnership  interests offered by the Partnership in a
Dilution  Offering  shall  be sold in the  manner  and  according  to the  terms
prescribed in the sole  discretion of the General  Partner;  provided,  however,
that any additional limited partnership interests offered in a Dilution Offering
will be sold for a price no lower than the highest price for which proportionate
limited  partnership  interests in the Partnership  have been previously sold by
the Partnership unless otherwise determined by a vote of the General Partner and


                                       -6-
<PAGE>

a Majority in Interest of the Limited Partners.  Any sale of additional  limited
partnership  interests  will  result  in  the  proportionate   dilution  of  the
Percentage Interests of the existing Partners. Notwithstanding the above, in the
event of a  Dilution  Offering,  the  General  Partner  may  elect,  in its sole
discretion,   to  prevent   dilution  of  its  Percentage   Interest  by  either
contributing  additional  capital to the  Partnership  or purchasing  additional
limited  partnership  interest in any Dilution Offering.  Limited Partners shall
have no right to purchase  additional  limited partner interests in any Dilution
Offering.  Any investor acquiring a limited  partnership  interest in a Dilution
Offering  shall agree to be bound by the terms of this  Agreement,  and shall be
automatically  admitted as a Limited Partner of the Partnership.  Any adjustment
in the Partners'  Percentage  Interests resulting from a Dilution Offering shall
be set forth on an amended Schedule A to be attached hereto.

8. GUARANTIES.

     Each Partner  agrees to execute and deliver to the  Partnership on the date
of his or her  admission to the  Partnership  a Guaranty in the amount set forth
opposite his or her name on Schedule A attached hereto.

9. CONDITIONS TO THE CAPITAL CONTRIBUTIONS OF CERTAIN LIMITED PARTNERS.

     The  obligations  of  any  Limited  Partners  acquiring  their  Partnership
Interests  in  the  Offering  or  a  Dilution  Offering  to  make  cash  Capital
Contributions  hereunder are subject to the condition that the  representations,
warranties,  agreements  and  covenants  of the  General  Partner  set  forth in
Article 10 of this  Agreement are and shall be true and correct or have been and
will have been complied  with in all material  respects on the date such Capital
Contributions  are  required  to be made,  except  to the  extent  that any such
representation or warranty expressly pertains to an earlier date.

10. REPRESENTATIONS, WARRANTIES AND COVENANTS OF THE GENERAL PARTNER.

     10.1 The General  Partner  hereby  represents  and  warrants to the Limited
Partners that:

     (a) The Partnership is a limited  partnership formed in accordance with and
validly  existing  under the Act and the other  applicable  laws of the State of
Montana;

     (b) The General Partner is duly qualified to transact business in the State
of Montana;

     (c) The interests in the Partnership of the Limited Partners will have been
duly  authorized or created and validly  issued and the Limited  Partners  shall
have no


                                       -7-
<PAGE>

personal liability to contribute money to the Partnership other than the amounts
agreed to be  contributed  by them in the  manner  and on the terms set forth in
this Agreement,  subject,  however,  to such limitations as may be imposed under
the Act;

     (d) Except as  disclosed in the  Memorandum  or  documentation  prepared in
connection  with a Dilution  Offering,  no material breach or default adverse to
the Partnership exists under the terms of any other material agreement affecting
the Partnership; and

     (e) The General  Partner is a  California  corporation  formed and existing
under the laws of the State of California.

     10.2 The General Partner hereby covenants to the Limited Partners that:

     (a) It will at all times act in a  fiduciary  manner  with  respect  to the
Partnership and the Limited Partners;

     (b) Except as provided in Article 19, it will serve as the General  Partner
of the Partnership until the Partnership is terminated  without  reconstitution;
and

     (c) It will  cause the  Partnership  to carry  adequate  public  liability,
property  damage and other  insurance  as is  customary  in the  business  to be
engaged in by the Partnership.

11. ADMISSION OF LIMITED PARTNERS.

     The General  Partner  may permit the offer and sale of limited  partnership
interests  on the terms and  conditions  provided  in the  Memorandum  or future
Dilution  Offerings and may admit persons  subscribing  for interests as Limited
Partners  in the  Partnership  on the  terms  and  conditions  set forth in this
Article 11.

     (a) The General Partner shall have approved of the admission of said person
in writing on such terms and conditions as the General Partner shall determine;

     (b) Said person shall have executed such  documents or  instruments  as the
General  Partner may deem  necessary or desirable to effect his or her admission
as a Limited Partner;

     (c) Said  person  shall  have  accepted  and  adopted  all of the terms and
provisions of this Agreement, as then amended;



                                       -8-
<PAGE>

     (d) Said person (if a corporation)  shall deliver to the General  Partner a
certified  copy of a  resolution  of its Board of  Directors  authorizing  it to
become a Limited Partner under the terms and conditions of this Agreement; and

     (e) Said  person,  upon  request  by the  General  Partner,  shall pay such
reasonable  expenses as may be incurred in  connection  with its  admission as a
Limited Partner.

12. CAPITAL ACCOUNTS.

     A Capital  Account shall be  established  for each Partner and shall at all
times be  determined  and  maintained  in  accordance  with the  Final  Treasury
Regulations  under  Section 704(b)  of the Code,  as the same may be amended.  A
Partner shall not be entitled to withdraw any part of his or her Capital Account
or to receive  any  distribution  from the  Partnership,  except as  provided in
Articles 14 and 25.

     (a) Each Partners' Capital Account shall be increased by:

     (i) The amount of his or her Capital  Contribution  pursuant to  Article 7;
and

     (ii) The amount of Profits  allocated to him or her pursuant to Article 13;
and

     (iii) The Partner's pro rata share  (determined  in the same manner as such
Partner's share of Profits and Losses allocated  pursuant to Article 13  hereof)
of any income or gain exempt from tax.

     (b) Each Partner's Capital Account shall be decreased by:

     (i) The amount of Losses  allocated to him or her  pursuant to  Article 13;
and

     (ii) The amount of Partnership  Cash Flow,  Partnership  Sales Proceeds and
Partnership  Refinancing  Proceeds distributed to him or her pursuant to Article
14; and

     (iii)  The  Partner's  pro rata  share  of any  other  expenditures  of the
Partnership which are not deductible in computing  Partnership Profits or Losses
and which are not added to the tax basis of any Partnership property, including,
without limitation,  expenditures described in Section 705(a)(2)(B) of the Code.
The  Partner's  pro rata share of such  expenditures  shall be determined in the
same manner as


                                       -9-
<PAGE>

such Partner's share of Profits and Losses allocated pursuant to Article 13.

13. ALLOCATIONS

     (a) Profits and Losses.  The Profits and Losses of the Partnership shall be
allocated  among the Partners in  accordance  with their  respective  Percentage
Interests.  In allocating  Profits and Losses, Net Gains and Losses from Capital
Transactions (a part of Profits and Losses), if any, shall be allocated first.

     (b)  Qualified  Income  Offset.  If any Partner  unexpectedly  receives any
adjustment, allocation or distribution described in Treasury Regulations Section
1.704-1(b)(2)(ii)(d)(4)  through (6) which causes or increases a deficit balance
in such  Partner's  Capital  Account  (adjusted  for this  purpose in the manner
provided  in  Treasury  Regulations  Section  1.704-1(b)(2)(ii)(d)),   items  of
Partnership income and gain shall be specially allocated to each such Partner in
an amount and manner  sufficient  to  eliminate,  to the extent  required by the
Regulations, the deficit Capital Account of such Partner as quickly as possible,
provided that an allocation  pursuant to this Article 13(b) shall be made if and
only to the extent that such Partner would have a deficit  Capital Account after
all other allocations provided for in this Article 13 have been tentatively made
as if this Article 13(b) were not in the  Agreement.  This provision is intended
to be a "qualified  income offset," as defined in Treasury  Regulations  Section
1.704-1(b)(2)(ii)(d),  such Regulation being specifically incorporated herein by
reference.

     (c) Sales Commission.  The Sales Commission shall be allocated to the Units
which are not held by the General Partner and its Affiliates and are acquired in
the Offering in proportion to the respective capital  contributions  represented
by such Units (i.e.,  $100 in Sales Commissions per each such Unit). The purpose
of this Article 13(c) is to allocate the Sales  Commission to those Partners who
actually bore the burden of paying the Sales Commission.

     (d)  Allocations  Between  Transferor and  Transferee.  In the event of the
transfer (other than the pledges of the General Partner's  interest permitted by
Article 19 or Permitted Pledges described in Article 17.2(b)) of all or any part
of a Partner's interest (in accordance with the provisions of this Agreement) in
the Partnership at any time other than at the end of a Year, or the admission of
a new Partner (in accordance with the terms of this Agreement), the transferring
Partner  or  new  Partner's  share  of the  Partnership's  income,  gain,  loss,
deductions and credits, as computed both for accounting purposes and for federal
income tax purposes,  shall be allocated between the transferor  Partner and the
transferee Partner (or Partners),  or the new Partner and the other Partners, as
the case may be, in the same ratio as the number of days in such Year before and
after the date of the transfer or admission;

  
                                      -10-
<PAGE>

provided,  however,  that if there has been a sale or other  disposition  of the
assets of the  Partnership  (or any part  thereof)  during  such Year,  then the
General Partner may elect, in its sole  discretion,  to treat the periods before
and after the date of the transfer or  admission as separate  Years and allocate
the Partnership's net income, gain, net loss, deductions and credits for each of
such deemed separate Years.  Notwithstanding  the foregoing,  the  Partnership's
"allocable  cash basis items," as that term is used in Section  706(d)(2)(B)  of
the Code,  shall be allocated  as required by Section  706(d)(2) of the Code and
the regulations thereunder.

     (e) Tax Withholding.  The Partnership shall be authorized to pay, on behalf
of any Partner, any amounts to any federal, state or local taxing authority,  as
may be necessary for the Partnership to comply with tax  withholding  provisions
of the Code or the other income tax or revenue laws of any taxing authority.  To
the extent the Partnership  pays any such amounts that it may be required to pay
on behalf of a Partner,  such amounts shall be treated as a cash distribution to
such  Partner  and shall  reduce  the  amount  otherwise  distributable  to such
Partner.

14. DISTRIBUTIONS.

     (a) Distribution of Partnership  Cash Flow.  Partnership Cash Flow shall be
distributed  to the  Partners  within  60 days  after the end of each  Year,  or
earlier  in the  discretion  of the  General  Partner,  in  proportion  to their
respective Percentage Interests at the time of distribution.
 
     (b) Distribution of Partnership  Refinancing Proceeds and Partnership Sales
Proceeds.  Partnership Refinancing Proceeds and Partnership Sales Proceeds shall
be distributed to the Partners within 60 days of the Capital  Transaction giving
rise to such proceeds,  or earlier in the discretion of the General Partner,  in
proportion to their respective Percentage Interests at the time of distribution.

     (c) Distribution in Liquidation.  Upon liquidation of the Partnership,  all
of the  Partnership's  property  shall be sold and Profits and Losses  allocated
accordingly.   Proceeds  from  the  liquidation  of  the  Partnership  shall  be
distributed in accordance with Article 25.

l5. RIGHTS AND OBLIGATIONS OF LIMITED PARTNERS.

     15.1 Management. The Limited Partners shall not take part in the management
of the business,  nor transact any business for the Partnership,  nor shall they
have power to sign for or to bind the Partnership. The Partnership may, however,
contract  with  one or  more  Limited  Partners  to act  as  the  local  medical
director(s) of the Lithotripter System. No Limited Partner may withdraw from the
Partnership except as expressly permitted herein.



                                      -11-
<PAGE>

     15.2  Operation of  Lithotripter  System.  The Limited  Partners  shall not
operate or utilize  the  Partnership  Lithotripter  System or other  Partnership
equipment except pursuant to (i) an agreement with the Partnership;  or (ii) any
other arrangement specifically approved by the General Partner.

     15.3 Outside Activities. The Limited Partners agree that they owe fiduciary
duties to the Partnership  and, as a consequence,  each Limited Partner (that is
not the General  Partner or an  Affiliate  of the General  Partner)  agrees that
(s)he shall not engage in "Outside Activities" (as defined below) in the "Market
Area" (as defined below)  while(s)he is a Limited Partner in the Partnership and
shall  otherwise be subject to the  provisions of this Article 15.3.  The phrase
"Outside Activities" means directly or indirectly owning,  leasing or subleasing
a lithotripter (or any similar  equipment or competing devices used for treating
renal or biliary stone disease) or any other therapeutic  equipment  acquired by
the Partnership.  Prohibited indirect ownership shall include without limitation
the direct or indirect  ownership of any interest in a business venture (through
stock ownership, partnership interest ownership, ownership by or through a close
family member, or as otherwise  determined in good faith by the General Partner)
involving the ownership,  purchase,  lease, sublease,  promotion,  management or
operation of a lithotripter (or similar  equipment or competing devices used for
treating renal or biliary stone disease) or other competing device or equipment,
unless the General Partner determines that such activity by the Limited Partners
is not  detrimental to the best interests of the  Partnership.  The ownership of
less than 1% of the capital stock  (calculated  on a fully  diluted  basis) of a
corporation  whose stock is  publicly  owned or  regularly  traded on any public
exchange shall not constitute an Outside Activity.

     Upon the  termination  or transfer of a Limited  Partner's  interest in the
Partnership  for any  reason,  including  a transfer  pursuant  to Article  18.3
hereof, the withdrawing Limited Partner shall not, for a period of two (2) years
following  the date of  withdrawal,  engage  in any  Outside  Activities  in any
"Market Area" in which the  Partnership  is  transacting  business or within the
prior twelve months has transacted business (the "Restricted  Facilities").  For
the purposes of this  Article 15.3,  the term  "Market  Area" shall mean (i) the
area within a fifty (50) mile  radius of any  Restricted  Facility,  but if such
area is determined by a court of competent jurisdiction to be too broad, then it
shall  mean (ii) the area  within a thirty  (30) mile  radius of any  Restricted
Facility, but if such area is determined by a court of competent jurisdiction to
be too broad then it shall mean (iii) the area within a fifteen (15) mile radius
of any Restricted Facility.

     In the event a Limited  Partner  wishes and intends to engage in an Outside
Activity in a Market Area, he or she must provide  written notice of such intent
to the General  Partner prior to engaging in the Outside  Activity.  The written
notice shall be deemed an election by the Limited  Partner to withdraw  from the
Partnership (the "Notice of Withdrawal"), and shall give the General Partner the
purchase  rights as  provided  in  Article  18.3  hereof.  After  the  Notice of
Withdrawal,  the former Limited Partner may engage in an Outside Activity in the
Market Area only after waiting the period of two years specified in this Article
15.3. In the event of breach of the waiting  period,  the  Partnership  shall be
entitled to any remedy at law or equity with respect to such  breach,  including
without limitation an injunction or suit for damages.


                                      -12-

<PAGE>


     If a Limited  Partner during his or her  participation  in the  Partnership
engages in an Outside  Activity in a Market Area  without  first  notifying  the
General  Partner in violation of this Article 15.3, the Limited Partner shall be
deemed to have  given a Notice of  Withdrawal  on the date the  General  Partner
first  becomes  aware of the Limited  Partner's  Outside  Activity in the Market
Area.  Upon  receiving a Limited  Partner's  Notice of  Withdrawal or equivalent
thereof, the Partnership may invoke the purchase rights provided in Article 18.3
and shall be entitled  to any other  remedy at law or equity  including  without
limitation an injunction or suit for damages.
 
     15.4   Disclosure  of  Confidential   Information.   Each  Limited  Partner
acknowledges and agrees that his or her  participation in the Partnership  under
this Agreement  necessarily  involves his or her  understanding of and access to
certain  trade  secrets and other  confidential  information  pertaining  to the
business of the Partnership.  Accordingly,  each Limited Partner (other than the
General   Partner  and  its  Affiliates  that  may  also  hold  Limited  Partner
Partnership  Interests) agrees that at all times during his or her participation
in the Partnership as a Limited Partner and thereafter, (s)he will not, directly
or indirectly, without the express written authority of the Partnership,  unless
required by law or directed by a applicable legal authority having  jurisdiction
over  the  Limited  Partner,  disclose  or use for the  benefit  of any  person,
corporation  or other  entity  (other  than  the  Partnership),  or the  Limited
Partner, (i) any trade, technical, operational, management or other secrets, any
patient or customer  lists or other  confidential  or secret data,  or any other
proprietary,  confidential or secret  information of the Partnership or (ii) any
confidential information concerning any of the financial arrangements, financial
condition,  hospital or  physician  contracts,  third party payor  arrangements,
quality assurance and outcome analysis programs, competitive status, customer or
supplier matters, internal organizational matters, technical abilities, or other
business affairs of or relating to the Partnership.  The Limited Partners (other
than the General  Partner and its Affiliates  that may also hold Limited Partner
Partnership  Interests)  acknowledge  that  all  of  the  foregoing  constitutes
proprietary information,  which is the exclusive property of the Partnership. In
the event of breach of this Article 15.4 as determined  by the General  Partner,
the Partnership shall be entitled to any remedy at law or equity with respect to
such breach, including without limitation, an injunction or suit for damages.

16. LIMITED LIABILITY.

     No  Limited  Partner  shall be  required  to make any  contribution  to the
capital  of the  Partnership  except  as set forth in  Article  7, nor shall any
Limited  Partner  in his or her  capacity  as such,  be bound by, or  personally
liable for, any expense,  liability or obligation of the  Partnership  except to
the extent of his or her (i) interest in the  Partnership;  (ii)  Guaranties  of
Partnership  obligations;  and (iii) obligation to return  distributions made to
him or her under certain circumstances as required by the Act.



                                      -13-
<PAGE>

17. TRANSFER OF INTERESTS AND ADMISSION OF PARTNERS.

     17.1 Transferability.

     (a) The term  "transfer"  when used in this  Agreement  with  respect  to a
Partnership Interest includes a sale, assignment,  gift, pledge, exchange or any
other  disposition  (but  does  not  include  the  issuance  of new  Partnership
Interests pursuant to a Dilution Offering);

     (b) Except as otherwise  provided herein,  the General Partner shall not at
any time transfer or assign its interest or obligation as General Partner;

     (c)  The  Partnership   Interest  of  any  Limited  Partner  shall  not  be
transferred,  in whole or in part,  except in accordance with the conditions and
limitations set forth in Articles 17.2 or 18;

     (d) The transferee of a Partnership  Interest by  assignment,  operation of
law or otherwise,  shall have only the rights,  powers and privileges enumerated
in Article  17.3 or  otherwise  provided  by law and may not be  admitted to the
Partnership  as a Limited  Partner  except as provided  in Article  17.4 or as a
General Partner except as provided in Article 17.5;

     (e) Notwithstanding  any provision herein to the contrary,  the Partnership
Agreement  shall in no way  restrict  the  issuance or transfers of stock of the
General Partner; and

     (f) Notwithstanding  any provision herein to the contrary,  the issuance of
Partnership  Interests  pursuant to a Dilution Offering and the admission of new
Limited  Partners  pursuant  to a Dilution  Offering  shall be  governed  by the
provisions of Article 7.4 of this Agreement.

     17.2 Restrictions on Transfers by Limited Partners.

     (a) All or part of a Partnership  Interest may be  transferred by a Limited
Partner  only with the prior  written  approval  of the General  Partner,  which
approval may be granted or denied in the sole discretion of the General Partner.

     (b) The General  Partner  shall not approve any  transfer of a  Partnership
Interest,  except a pledge of any Partnership Interest by the General Partner to
any bank, insurance company or other financial  institution to secure payment of
indebtedness (a "Permitted Pledge"), or otherwise unless the proposed transferee
shall have furnished the General Partner with a sworn statement that:



                                      -14-
<PAGE>

     (i) The  proposed  transferee  proposes to acquire  his or her  Partnership
Interest  as a  principal,  for  investment  and not  with a view to  resale  or
distribution;

     (ii)  The   proposed   transferee   meets   such   requirements   regarding
sophistication, income and net worth as required by applicable state and federal
securities laws;

     (iii) The proposed transferee has met such net worth and income suitability
standards as have been established by the General Partner;

     (iv) The proposed transferee  recognizes that investment in the Partnership
involves  certain risks and has taken full  cognizance of and understands all of
the risk factors related to the purchase of a Partnership Interest; and

     (v) The proposed  transferee has met all other  requirements of the General
Partner for the proposed transfer.

     (c)  Other  than  in the  case  of a  Permitted  Pledge,  a  transfer  of a
Partnership  Interest  may be made  only  if,  prior to the  date  thereof,  the
Partnership  upon request  receives an opinion of counsel,  satisfactory in form
and substance to the General Partner, that neither the offering nor the proposed
transfer will require  registration under federal or applicable state securities
laws or regulations.

     17.3 Rights of Transferee. Unless admitted to the Partnership in accordance
with Article 17.4, the transferee of a Partnership Interest or a part thereof or
any right, title or interest therein shall not be entitled to any of the rights,
powers,  or privileges of his or her predecessor in interest,  except that (s)he
shall  be  entitled  to  receive  and be  credited  or  debited  with his or her
proportionate share of Partnership income, gains, Profits,  Losses,  deductions,
credits or distributions.

     17.4 Admission of Limited Partners. Except as otherwise provided in Article
18, the General  Partner,  or the  transferee of all or part of the  Partnership
Interest of either a General  Partner or a Limited  Partner,  may be admitted to
the  Partnership as a Limited Partner upon furnishing to the General Partner all
of the following:

     (a) The  written  approval  of a Majority in Interest of all of the Limited
Partners (except the assignor  Partner),  or the assignor  Partner alone,  which
approval  may be granted or denied in the sole  discretion  of such  Partners or
Partner (as the case may be);



                                      -15-
<PAGE>

     (b) The written  approval of the General  Partner,  which  approval  may be
granted or denied in the sole discretion of the General Partner;

     (c) Acceptance,  in a form satisfactory to the General Partner,  of all the
terms and  conditions  of this  Agreement  and any other  documents  required in
connection with the operation of the  Partnership  pursuant to the terms of this
Agreement;

     (d) A properly executed power of attorney  substantially  identical to that
contained in Article 38;

     (e) Such other  documents  or  instruments  as may be  required in order to
effect his or her admission as a Limited Partner; and

     (f) Payment of such  reasonable  expenses as may be incurred in  connection
with his or her admission as a Limited Partner.

     17.5 Admission of General Partners. A Limited Partner, or the transferee of
all or part of the Partnership  Interest of the General Partner, may be admitted
to the  Partnership as a general  partner upon furnishing to the General Partner
all of the following:

     (a) The  written  consent of both the  General  Partner  and a Majority  in
Interest of the Limited Partners,  which consent may be granted or denied in the
sole discretion of the Partners;

     (b)  Such  financial  statements,  guarantees  or other  assurances  as the
General  Partner may require with regard to the ability of the proposed  general
partner to fulfill the financial obligations of a general partner hereunder;

     (c) Acceptance,  in form  satisfactory to the General  Partner,  of all the
terms and  provisions  of this  Agreement  and any other  documents  required in
connection with the operation of the  Partnership  pursuant to the terms of this
Agreement; 

     (d) A certified  copy of a resolution of its Board of Directors (if it is a
corporation)  authorizing  it to  become a general  partner  under the terms and
conditions of this Agreement;

     (e) A power  of  attorney  substantially  identical  to that  contained  in
Article 38;

     (f) Such other  documents  or  instruments  as may be  required in order to
effect its admission as a general partner; and


                                      -16-
<PAGE>

     (g) Payment of such  reasonable  expenses as may be incurred in  connection
with its admission as a general partner.

     Notwithstanding  the above, a transferee  that controls or is controlled by
the General  Partner or one or more of its Affiliates  that receives all or part
of the  Partnership  Interest  of the  General  Partner  may be  admitted to the
Partnership  as a general  partner upon  complying  with all the  provisions  of
Article 17.5 except for subparagraph  17.5(a).  As long as the transferee either
controls  or is  controlled  by  the  General  Partner  or one  or  more  of its
Affiliates,  no  Limited  Partner  consents  will  be  required  to  admit  such
transferee as a general partner to the Partnership.

     17.6 Amendment of Certificate of Limited Partnership and Qualification. The
General  Partner shall take all steps  necessary and  appropriate to prepare and
record any  amendments  to the  Certificate  of Limited  Partnership,  as may be
necessary or appropriate  from time to time to comply with the  requirements  of
the Act, including, without limitation, upon the admission to the Partnership of
any general partner pursuant to the provisions of Article 17.5, and may for this
purpose exercise the power of attorney delivered to the General Partner pursuant
to Article 17.5 or 38. In  addition,  the General  Partner  shall take all steps
necessary and appropriate to prepare and record any and all documents  necessary
to qualify the Partnership to do business in jurisdictions where the Partnership
is doing  business,  and may for this  purpose  exercise  the power of  attorney
delivered to the General Partner pursuant to Articles 17.4, 17.5 or 38.

     17.7  Fundamental  Changes.  In the event a plan is approved by the General
Partner  providing  for the  merger or  consolidation  of the  Partnership  with
another  person  or  entity,  or the  sale  of all or  substantially  all of the
Partnership Interests,  including without limitation the exchange of Partnership
Interests for equity  interests in another person or entity or for cash or other
consideration  or  combination  thereof,  then and in such  event,  the  Limited
Partners shall be obligated to take or refrain from taking,  as the case may be,
such actions as the plan may provide, including,  without limitation,  executing
such  instruments,  and providing such  information as the General Partner shall
reasonably  request.  Any plan described in this Article 17.7 may also effect an
amendment to the  Partnership  Agreement  or the  adoption of a new  partnership
agreement in connection with the merger of the  Partnership  with another person
or entity. The plan may also provide that the General Partner and its Affiliates
shall receive fees for services rendered in connection with the operation of the
Partnership  or  any  successor   entity   following  the  consummation  of  the
transactions described in the plan, and neither the Partnership nor the Partners
shall  have  any  right  by  virtue  of this  Agreement  in the  income  derived
therefrom.  Any  securities  or other  consideration  to be  distributed  to the
Partners  pursuant to the plan shall be  distributed  in the manner set forth in
Article 25(c) as though the Partnership were being liquidated.  For this purpose
only,  the fair market  value of the  securities  or other  consideration  to be
received  pursuant  to the plan shall be treated as  "Profits"  and the  capital
accounts of the Partners  shall be  increased in the manner  provided in Article
12(a)(ii).  No Partner  shall be entitled to any  dissent,  appraisal or similar
rights in connection with a plan contemplated by this Article 17.7.



                                      -17-
<PAGE>

     17.8 Withdrawal of Initial Limited Partner. Upon the date the first Limited
Partner is admitted to the  Partnership  in  accordance  with Article 11 of this
Agreement, the Initial Limited Partner shall withdraw from the Partnership,  and
thereupon  his  Capital  Contribution  shall  be  returned  and his  Partnership
Interest canceled and reallocated to the Limited Partners.

18. OPTIONAL PURCHASE OF LIMITED PARTNERSHIP INTERESTS ON CERTAIN EVENTS.

     18.1  Death.  Upon the death of a Limited  Partner,  the  deceased  Limited
Partner's  executor,  administrator,  or other legal or personal  representative
shall give written notice of that fact to the General  Partner.  The Partnership
shall  have the  option to  purchase  at the  Closing  (as  defined  below)  the
Partnership   Interest  of  the  deceased   Limited  Partner  (whose   executor,
administrator  or other  legal or  personal  representative  shall  then  become
obligated  to sell such  Partnership  Interest) at the price  determined  in the
manner  provided  in  Article 18.6  of  this  Agreement  and  on the  terms  and
conditions  provided in Article 18.7 of this  Agreement.  The Partnership  shall
have a period of thirty (30) days  following  the date of notice of the death of
the Limited Partner (the "Option  Period") within which to notify in writing the
deceased Limited  Partner's  executor,  administrator or other legal or personal
representative,  whether the Partnership  wishes to purchase all or a portion of
the Partnership  Interest of the deceased  Limited  Partner.  If the Partnership
does not elect to  purchase  the entire  Partnership  Interest  of the  deceased
Limited  Partner  before the  expiration  of the Option Period and in the manner
provided  herein,  the portion of the Partnership  Interest not purchased by the
Partnership  shall  be  held  by  the  deceased  Limited   Partner's   executor,
administrator  or  other  legal  representative  pursuant  to the  terms of this
Agreement.

     18.2  Bankruptcy,  Insolvency or  Assignment  for Benefit of Creditors of a
Limited Partner. In the event that an involuntary or voluntary  proceeding under
the Federal  Bankruptcy  Code,  as amended,  is filed for or against any Limited
Partner,  or if any Limited  Partner shall make an assignment for the benefit of
his creditors,  or if any Limited Partner has a receiver or custodian  appointed
for his assets,  or any Limited  Partner  generally  fails to pay his debts when
due, the insolvent  Limited  Partner  shall give written  notice (the "Notice of
Insolvency") to the General  Partner of the  commencement of any such proceeding
or the  occurrence  of such event within five days of the first notice to him of
such  commencement or occurrence of such event.  The Partnership  shall have the
option to purchase at the Closing (as defined below) the Partnership Interest of
the  insolvent  Limited  Partner  (which the  insolvent  Limited  Partner or his
trustee, custodian,  receiver or other personal or legal representative,  as the
case may be, shall then become obligated to sell) at the price determined in the
manner  provided  in  Article 18.6  of  this  Agreement  and  on the  terms  and
conditions  provided in Article 18.7 of this  Agreement.  The Partnership  shall
have a period of thirty (30) days following the date of the Notice of Insolvency
(the "Option  Period")  within which to notify in writing the insolvent  Limited
Partner  or his  trustee,  custodian,  receiver,  or  other  legal  or  personal
representative,  whether the Partnership  wishes to purchase all or a portion of
the Partnership  Interest of the insolvent  Limited Partner.  If the Partnership
does not elect to purchase  the entire  Partnership  Interest  of the  insolvent
Limited  Partner  before the  expiration  of the Option Period and in the manner
provided  herein,  the portion of the Partnership  Interest not purchased by the
Partnership shall be held


                                      -18-
<PAGE>

by the insolvent  Partner,  his trustee,  custodian,  receiver or other legal or
personal representative pursuant to the terms of this Agreement.

     18.3  Breach of  Article  15.3.  In the event the  General  Partner  either
receives a Notice of Withdrawal  as provided in Article 15.3 or receives  notice
of a breach  of  Article  15.3 by or with  respect  to a  Limited  Partner  (the
"Defaulting  Limited  Partner"),  the  General  Partner  may elect,  in its sole
discretion,  to treat such event as a default  under this  Agreement and enforce
the  provisions of this Article 18.3. If the General  Partner  elects to enforce
the  provisions  of this Article  18.3,  the General  Partner shall give written
notice of such  election  (the "Notice of Default")  to the  Defaulting  Limited
Partner  within 180 days of the date the  General  Partner  first  received  the
Notice of Withdrawal or notice of the defaulting  event.  The Partnership  shall
have the option to purchase at the  Closing (as defined  below) the  Partnership
Interest of the Defaulting Limited Partner (which the Defaulting Limited Partner
shall  then  become  obligated  to sell) at the price  determined  in the manner
provided  in  Article  18.6 of this  Agreement  and on the terms and  conditions
provided in Article 18.7 of this Agreement.  The Partnership shall have a period
of thirty  (30) days  following  the date it sends the  Notice of  Default  (the
"Option  Period")  within  which to notify in  writing  the  Defaulting  Limited
Partner,  whether the  Partnership  wishes to  purchase  all or a portion of the
Partnership  Interest of the Defaulting Limited Partner. If the Partnership does
not elect to purchase the entire Partnership  Interest of the Defaulting Limited
Partner  before the  expiration of the Option Period and in the manner  provided
herein, the portion of the Partnership Interest not purchased by the Partnership
shall be held by the Defaulting  Limited  Partner  pursuant to the terms of this
Agreement.

     18.4 Domestic  Proceeding.  In the event that a spouse of a Limited Partner
commences  against  a  Limited  Partner,  or a  Limited  Partner  is named in, a
Domestic Proceeding,  the Limited Partner shall give written notice (the "Notice
of Domestic  Proceeding") to the General Partner of the commencement of any such
proceeding within five days of the first notice to him of such commencement. The
Partnership  shall have the option to purchase at the Closing (as defined below)
the  Partnership  Interest  of the  Limited  Partner  involved  in the  Domestic
Proceeding  (which the Limited Partner shall then become  obligated to sell), at
the price  determined in the manner  provided in Article 18.6 of this  Agreement
and on the terms and conditions provided in Article 18.7 of this Agreement.  The
Partnership  shall have a period of thirty (30) days  following  the date of the
Notice of Domestic  Proceeding  (the "Option  Period") within which to notify in
writing the Limited  Partner  involved in the Domestic  Proceeding,  whether the
Partnership  wishes to purchase all or a portion of the Partnership  Interest of
such  Limited  Partner.  If the  Partnership  does  not  elect to  purchase  the
Partnership  Interest of the Limited Partner involved in the Domestic Proceeding
before the  expiration of the Option Period and in the manner  provided  herein,
the portion of the Partnership  Interest not purchased by the Partnership  shall
be held by such Limited Partner pursuant to the terms of this Agreement.

     18.5  Divestiture  Option.  If state  or  federal  regulations  or laws are
enacted or applied,  or if any other legal  developments  occur,  which,  in the
opinion  of the  General  Partner  adversely  affect (or  potentially  adversely
affect) the operation of the Partnership (e.g., the enactment


                                      -19-
<PAGE>

or application of prohibitory  physician  self-referral  legislation against the
Partnership or its Partners),  the General Partner shall promptly either, in its
sole discretion,  (i) take the steps outlined in this Article 18.5 to divest the
Limited  Partners  of  their  Partnership   Interests,   or  (ii)  dissolve  the
Partnership  as provided in Article  24.1(f).  If the  General  Partner  chooses
option (i),  it shall  deliver a written  notice to all of the Limited  Partners
(the "Notice of Election") and purchase such  Partnership  Interests for its own
account.  The purchase price to be paid for each  Partnership  Interest shall be
determined  in the manner as provided in Article  18.6 and shall be on the terms
and  conditions  as provided in Article  18.7.  The transfer of the  Partnership
Interests  and the payment of the purchase  price (as provided in Article  18.6)
shall be made at such time as  determined  by the  General  Partner to be in the
best interests of the Partnership and its Limited Partners. Each Limited Partner
hereby makes,  constitutes and appoints the General Partner,  with full power of
substitution,  his true and lawful  attorney-in-fact,  to take such  actions and
execute such  documents on his behalf to effect the transfer of his  Partnership
Interest as provided in this Article 18.5. The foregoing power of attorney shall
not be affected  by the  subsequent  incapacity  or mental  incompetence  of any
Limited Partner.

     18.6  Purchase  Price.  The purchase  price to be paid for the  Partnership
Interest of any Limited  Partner whose interest is being  purchased  pursuant to
the provisions of  Article 18.1,  18.2, 18.3, 18.4 or 18.5 (the "Selling Limited
Partner")  shall be determined in the manner  provided in this Article 18.6. The
purchase price for a Partnership  Interest  purchased pursuant to the provisions
of Article 18.1, 18.2, 18.3, 18.4 or 18.5 shall be an amount equal to the lesser
of (i) the  fair  market  value of the  Selling  Limited  Partner's  Partnership
Interest on the Valuation Date (prorated in the event that only a portion of his
or her  Partnership  Interest is being  purchased) as determined by an Appraiser
(as defined below) selected by the General Partner,  or (ii) the Selling Limited
Partner's share of the  Partnership's  book value, if any (prorated in the event
that only a portion of his or her  Partnership  Interest is being  purchased) as
reflected by the Capital Account of the Selling Limited Partner  (unadjusted for
any appreciation in Partnership assets and as reduced by depreciation deductions
claimed  by the  Partnership  for tax  purposes)  as of the  Valuation  Date (as
defined below). The General Partner, in its sole discretion,  may pursue both of
the above valuation  methods and choose the lesser value of the two as indicated
above,  or may designate and follow only one of the methods in  calculating  the
purchase price.  For purposes of this Article 18.6, the term  "Appraiser"  shall
mean an independent appraiser who is qualified in appraising limited partnership
interests and who has at least five years experience. In determining fair market
value, the Appraiser shall take into consideration any outstanding indebtedness,
liabilities,   liens  and  obligations  of  the  Partnership  and  the  relative
Partnership  Interests and capital accounts of all Partners, as well as applying
any customary discounts for lack of liquidity and control.  Such appraisal shall
be conducted in accordance with professional appraisal standards.  The valuation
of the  Appraiser  shall be  conclusive  and binding upon the  Partnership,  the
purchaser and the Selling  Limited Partner and his or her  representatives.  The
determination  of the Selling  Limited  Partner's  Capital  Account or aggregate
distributable  amount on the Valuation  Date (as defined below) shall be made by
the  Partnership's  internal  accountant (the  "Partnership  Accountant") upon a
review of the  Partnership  books of account,  and a formal  audit is  expressly
waived. The statement of the Partnership  Accountant with respect to the Capital
Account or aggregate distributable amount of the Selling


                                      -20-
<PAGE>

Limited  Partner on the Valuation Date shall be binding and conclusive  upon the
Partnership,   the   purchaser   and  the  Selling   Limited   Partner  and  his
representative.  The  Valuation  Date  shall  be  the  last  day  of  the  month
immediately  preceding  the  month in which  occurs:  (i) the death of a Selling
Limited  Partner,  in the  case of a  purchase  by  reason  of  death;  (ii) the
bankruptcy or insolvency of a Selling Limited Partner, in the case of a purchase
by reason of such  bankruptcy or  insolvency;  (iii) the Notice of Withdrawal or
breach of Article  15.3 as provided in Article 18.3 in the case of a purchase by
reason thereof; (iv) the commencement of the Domestic Proceeding, in the case of
a purchase  by reason  thereof;  or (v) the Notice of  Election  as  provided in
Article 18.5, in the case of a purchase by reason  thereof.  Any Limited Partner
whose  Partnership   Interest  is  purchased   pursuant  to  the  provisions  of
Article 18.1,  18.2,  18.3,  18.4 or 18.5 shall be entitled only to the purchase
price which shall be paid at the Closing in cash (or by  certified  or cashier's
check) and shall not be entitled to any Partnership distributions made after the
Valuation  Date.  The transfer of a  Partnership  Interest of a Selling  Limited
Partner  shall  be  deemed  to occur as of the  Valuation  Date and the  Selling
Limited  Partner shall have no voting or other rights as a Limited Partner after
such date. The purchaser shall be entitled to any distributions  attributable to
the transferred interest after the Valuation Date and the Partnership shall have
the right to deduct the  amount of any such  distributions  made to the  Selling
Limited Partner after the Valuation Date from the purchase price.

     18.7 Closing.

     18.7.1  Closing of Purchase and Sale.  The Closing of any purchase and sale
of a Partnership  Interest pursuant to Article 18.1, 18.2, 18.3, 18.4 or 18.5 of
this Agreement shall take place at the principal office of the  Partnership,  or
such other place  designated by the General  Partner,  on the date determined as
follows (the "Closing"):

     (a) In the case of a purchase and sale  occurring by reason of the death of
a Limited  Partner as provided in Article  18.1 of this  Agreement,  the Closing
shall be held on the thirtieth  day (or if such  thirtieth day is not a business
day, the next business day following the thirtieth  day) next following the last
to occur of:

     (i) Qualification of the executor or personal administrator of the deceased
Limited Partner's estate;

     (ii) The date on which any necessary determination of the purchase price of
the Partnership Interest to be purchased has been made; or

     (iii) The date that coincides with the close of the Option Period.

     (b) In  the  case  of a  purchase  and  sale  occurring  by  reason  of the
occurrence of one of the events described in Article 18.2, 18.3, 18.4 or 18.5 of
this

   
                                      -21-
<PAGE>

Agreement,  the Closing shall be held on the thirtieth day (or if such thirtieth
day is not a business day, the next  business day  following the thirtieth  day)
next following the later to occur of:

     (i) The date on which any necessary  determination of the purchase price of
the Partnership Interest to be purchased has been made; or

     (ii) The date that coincides with the close of the Option Period.

     At the Closing,  although not necessary to effect the transfer, the Selling
Limited  Partner shall  concurrently  with tender and receipt of the  applicable
purchase price,  deliver to the purchaser duly executed  instruments of transfer
and assignment,  assigning good and marketable  title to the portion or portions
of the Selling Limited  Partner's  entire  Partnership  Interest thus purchased,
free and clear from any liens or encumbrances  or rights of others therein.  The
parties acknowledge that occurrence of any of the triggering events described in
Article 18.1,  18.2,  18.3, 18.4 or 18.5 and compliance with all the Articles of
this  Agreement,  except the execution of the transfer  documents by the Selling
Limited  Partner as provided  above in this  Article 18.7.1,  are  sufficient to
effect the  complete  transfer  of the  Selling  Limited  Partner's  Partnership
Interest and the Selling Limited Partner shall be deemed to consent to admission
of the transferee as a substitute Limited Partner.  Notwithstanding  the date of
the  Closing  or whether a Closing  is  successfully  held,  the  transfer  of a
Partnership Interest of a Selling Limited Partner shall be deemed to occur as of
the Valuation Date as defined in Article 18.6. The deemed  transfer is effective
regardless of whether the Selling Limited Partner  performs the duties set forth
in this Article 18.7.1.

     18.7.2 Terms and  Conditions  of Purchase.  The  Partnership  Interest of a
Limited Partner shall not be transferred to any Partner unless the  requirements
of Articles 17.2 and 17.4 (b) through (f) are satisfied  with respect to it. The
purchaser shall be liable for all  obligations  and  liabilities  connected with
that portion of the  Partnership  Interest  transferred  to it unless  otherwise
agreed in writing.

19. SALE, ASSIGNMENT OR OTHER TRANSFER OF THE GENERAL PARTNER'S INTEREST.

     19.1 The General Partner may not mortgage, pledge,  hypothecate,  transfer,
sell,  assign or  otherwise  dispose of all or any part of its  interest  in the
Partnership,  whether  voluntarily,  by  operation  of  law  or  otherwise  (the
foregoing  actions being  hereafter  collectively  referred to as "Transfers" or
singularly as a "Transfer") except as permitted by this Article.



                                      -22-
<PAGE>

     19.2 If the General Partner makes a Transfer (other than a mortgage, pledge
or hypothecation) of its general partner interest in the Partnership pursuant to
this Article, it shall be liable for all obligations and liabilities incurred by
it as the general  partner of the Partnership on or before the effective date of
such Transfer, but shall not be liable for any obligations or liabilities of the
Partnership arising after the effective date of the Transfer.

     19.3 No Transfer by the General Partner shall be permitted unless:

     (a) Counsel for the Partnership shall have rendered an opinion that none of
the actions taken in connection with such Transfer will cause the Partnership to
be  classified  other than as a partnership  for federal  income tax purposes or
will cause the  termination or dissolution of the  Partnership  under state law;
and

     (b) Such documents or  instruments,  in form and substance  satisfactory to
counsel for the  Partnership,  shall have been  executed and delivered as may be
required in the opinion of counsel for the  Partnership to effect fully any such
Transfer.

     Notwithstanding the foregoing  provisions of this Article 19.3, the General
Partner  may pledge  its  interest  in the  Partnership  to any bank,  insurance
company or other financial institution to secure payment of indebtedness.

20. TERMINATION OF THE SERVICES OF THE GENERAL PARTNER.

     If the General  Partner  shall be finally  adjudged by a court of competent
jurisdiction to be liable to the Limited Partners or the Partnership for any act
of gross negligence or willful misconduct in the performance of its duties under
the terms of this  Agreement,  the  General  Partner  may be removed and another
substituted with the consent of all of the Limited Partners.  Such consent shall
be evidenced by a certificate of removal signed by all of the Limited  Partners.
In the event of removal,  the new general  partner  shall  succeed to all of the
powers,  privileges  and  obligations  of the General  Partner,  and the General
Partner's  interest in the Partnership  shall become that of a Limited  Partner,
and the General  Partner  shall  maintain  its same  Percentage  Interest in the
Partnership  notwithstanding  anything contained in the Act to the contrary.  In
addition,  in the event of removal, the new general partner shall take all steps
necessary and  appropriate to prepare and record an amendment to the Certificate
of Limited  Partnership  to reflect the  removal of the General  Partner and the
admission of such new general partner.

21. MANAGEMENT AND OPERATION OF BUSINESS.

     21.1 All  decisions  with  respect to the  management  of the  business and
affairs of the Partnership shall be made by the General Partner.



                                      -23-

<PAGE>

     21.2 The General  Partner  shall be under no duty to devote all of its time
to the business of the Partnership,  but shall devote only such time as it deems
necessary  to conduct  the  Partnership  business  and to operate and manage the
Partnership in an efficient manner.

     21.3 The General  Partner may charge to the  Partnership  all  ordinary and
necessary  costs  and  expenses,  direct  and  indirect,   attributable  to  the
activities, conduct and management of the business of the Partnership. The costs
and expenses to be borne by the Partnership  shall include,  but are not limited
to, all expenditures  incurred in acquiring and financing the Equipment or other
Partnership  property,  legal and  accounting  fees and  expenses,  salaries  of
employees of the  Partnership,  consulting  and quality  assurance  fees paid to
independent contractors, insurance premiums and interest.

     21.4 In  addition  to,  and not in  limitation  of,  any  rights and powers
covenanted by law or other provisions of this Agreement,  and except as limited,
restricted  or  prohibited  by the express  provisions  of this  Agreement,  the
General  Partner  shall have and may exercise on behalf of the  Partnership  all
powers and rights necessary,  proper,  convenient or advisable to effectuate and
carry out the purposes, business and objectives of the Partnership.  Such powers
shall include, without limitation, the following:

     (a) To conduct  the  Offering  and any  Dilution  Offering on behalf of the
Partnership;

     (b) To acquire on behalf of the  Partnership  (i) one or more fixed base of
transportable  lithotripsy systems,  including the Lithotripter System, (ii) any
other assets  related to the  provision of  lithotripsy  services,  or (iii) any
other assets or equipment or an interest in another entity  consistent  with the
purposes  of the  Partnership  as  provided  in  Article  4  (collectively,  the
"Additional  Assets"),  at such times and at such price and upon such terms,  as
the General Partner deems to be in the best interest of the Partnership;

     (c) To purchase,  hold, manage,  lease,  license and dispose of Partnership
assets,  including the purchase,  exchange,  trade or sale of the  Partnership's
assets at such price, or amount, for cash, securities or other property and upon
such  terms,  as the  General  Partner  deems to be in the best  interest of the
Partnership; provided, that should the Partnership assets be exchanged or traded
for  securities  or other  property  (the  "Replacement  Property")  the General
Partner shall have the same powers with regard to the Replacement Property as it
does towards the traded property;

     (d) To  exercise  the  option  of the  Partnership  to  purchase  a Limited
Partner's Partnership Interest pursuant to Article 18;

     (e)  To  determine  the  travel   itinerary  and  site  locations  for  the
Lithotripter System or other Partnership technology;


                                      -24-
<PAGE>

     (f) To borrow money for any Partnership  purpose (including the acquisition
of the Additional Assets) and, if security is required  therefor,  to subject to
any security device any portion of the property for the  Partnership,  to obtain
replacements  of any other  security  device,  to  prepay,  in whole or in part,
refinance,  increase,  modify,  consolidate  or extend any  encumbrance or other
security device;

     (g) To deposit,  withdraw, invest, pay, retain (including the establishment
of reserves  in order to acquire  the  Additional  Assets)  and  distribute  the
Partnership's  funds  in any  manner  consistent  with  the  provisions  of this
Agreement;

     (h) To institute and defend actions at law or in equity;

     (i) To enter into and carry out  contracts  and  agreements  and any or all
documents and  instruments  and to do any and all such other things as may be in
furtherance of  Partnership  purposes or necessary or appropriate to the conduct
of the Partnership activities;

     (j) To execute,  acknowledge and deliver any and all instruments  which may
be deemed necessary or convenient to effect the foregoing;

     (k) To form a new limited  partnership  made up of  qualified  investors to
treat gallstone  patients (if the FDA approves a lithotripter for such purpose),
and to contract on behalf of the  Partnership  with the new limited  partnership
for the use for a fee of a Partnership lithotripter for the treatment of the new
limited partnership's gallstone patients; and

     (l) To engage or retain  one or more  persons  to  perform  acts or provide
materials as may be required by the Partnership,  at the Partnership's  expense,
and to  compensate  such  person or persons  at a rate to be set by the  General
Partner,  provided that the  compensation is at the then prevailing rate for the
type of services and materials provided, or both. Any person, whether a Partner,
an Affiliate of a Partner or otherwise, including without limitation the General
Partner,  may be employed or engaged by the  Partnership to render  services and
provide  materials,   including,   but  not  limited  to,  management  services,
professional services,  accounting services,  quality assessment services, legal
services, marketing services,  maintenance services or provide materials; and if
such person is a Partner or an Affiliate  of a Partner,  (s)he shall be entitled
to, and shall be paid  compensation for said services or materials,  anything in
this Agreement to the contrary  notwithstanding,  provided that the compensation
to be received for such services or materials is  competitive in price and terms
with then prevailing rate for the type of services  and/or  materials  provided.
The Partnership,  pursuant to the terms of a Management Agreement, will contract
with the General Partner with respect to the supervision and coordination of the
management and administration of the day-to-day operations of the Partnership's


                                      -25-
<PAGE>

business for a monthly fee equal to 7.5% of net Partnership Cash Flow per month.
All costs incurred by the General  Partner under the Management  Agreement shall
be paid or reimbursed by the  Partnership  directly.  The  Partnership  may also
contract with healthcare  facilities and/or qualified physicians desiring to use
its Lithotripter System for the treatment of patients. Owning an interest in the
Partnership  shall not be a  condition  to using the  Lithotripter  System.  The
General Partner and its Affiliates may engage in or possess an interest in other
business  ventures of any nature and description  independently  or with others,
including,  but  not  limited  to,  the  operation  of a  fixed-base  or  mobile
lithotripsy  unit,  whether  or not such  business  ventures  are in  direct  or
indirect  competition with the Partnership,  and neither the Partnership nor the
Partners  shall  have  any  right by  virtue  of this  Agreement  in and to said
independent ventures or to the income or profits derived therefrom.

     21.5 In addition to other acts  expressly  prohibited or restricted by this
Agreement  or by law,  the General  Partner  shall have no  authority  to act on
behalf of the Partnership in:

     (a) Doing any act in contravention  of this Agreement or the  Partnership's
Certificate of Limited Partnership;

     (b) Doing any act which would make it  impossible  to carry on the ordinary
business of the Partnership;

     (c) Possessing or in any manner dealing with the Partnership's  property or
assigning the rights of the Partnership in the Partnership's  property for other
than Partnership purposes;

     (d) Admitting a person as a Limited  Partner or a General Partner except as
provided in this Agreement; or

     (e) Performing any act (other than an act required by this Agreement or any
act taken in good faith  reliance upon counsel's  opinion)  which would,  at the
time such act  occurred,  subject any Limited  Partner to liability as a general
partner in any jurisdiction.
 
22. RESERVES.

     The General  Partner may cause the  Partnership to create a reserve account
to be used exclusively for repairs and acquisition of Additional  Assets and for
any other valid  Partnership  purpose.  The General  Partner shall,  in its sole
discretion, determine the amount of payments to such reserve.



                                      -26-
<PAGE>

23. INDEMNIFICATION AND EXCULPATION OF THE GENERAL PARTNER.

     23.1 The General  Partner is accountable to the  Partnership as a fiduciary
and consequently must exercise good faith and integrity in handling  Partnership
affairs.  The General Partner and its Affiliates  shall have no liability to the
Partnership which arises out of any action or inaction of the General Partner or
its  Affiliates  if the  General  Partner  or its  Affiliates,  in  good  faith,
determined  that  such  course  of  conduct  was in  the  best  interest  of the
Partnership  and such course of conduct did not constitute  gross  negligence or
willful misconduct of the General Partner or its Affiliates. The General Partner
and its Affiliates  shall be indemnified by the Partnership  against any losses,
judgments,  liabilities,  expenses and amounts paid in  settlement of any claims
sustained by them in  connection  with the  Partnership,  provided that the same
were not the result of gross negligence or willful misconduct on the part of the
General Partner or its Affiliates.

     23.2 The General  Partner shall not be liable for the return of the Capital
Contributions of the Limited Partners,  and upon  dissolution,  Limited Partners
shall look solely to the assets of the Partnership.

24. DISSOLUTION OF THE PARTNERSHIP.

     24.1 The  Partnership  shall be dissolved and  terminated  and its business
wound up upon the occurrence of any one of the following events:

     (a) The expiration of its term on December 31, 2048;

     (b) The  filing by, on behalf of, or  against  the  General  Partner of any
petition or pleading,  voluntary or involuntary,  to declare the General Partner
bankrupt under any bankruptcy  law or act, or the  commencement  in any court of
any  proceeding,  voluntary  or  involuntary,  to declare  the  General  Partner
insolvent  or  unable  to pay its  debts,  or the  appointment  by any  court or
supervisory authority of a receiver, trustee or other custodian of the property,
assets or business of the General  Partner or the assignment by it of all or any
part of its  property or assets for the benefit of  creditors,  if said  action,
proceeding or  appointment  is not  dismissed,  vacated or otherwise  terminated
within ninety (90) days of its commencement;

     (c) The determination of the General Partner that the Partnership should be
dissolved;

     (d) The occurrence of an event  described in a plan approved by the General
Partner   pursuant  to  Article  17.7  resulting  in  the   dissolution  of  the
Partnership;



                                      -27-
<PAGE>

     (e) The  election  of the  General  Partner  to  dissolve  the  Partnership
following the occurrence of an event described in Article 18.5;

     (f)  Except as  otherwise  provided  in any plan  approved  by the  General
Partner pursuant to Article 17.7, the sale, exchange or other disposition of all
or substantially all of the property of the Partnership without making provision
for the replacement thereof; and

     (g) The dissolution,  retirement,  resignation,  death, disability or legal
incapacity  of  a  general  partner,  and  any  other  event  resulting  in  the
dissolution  or termination  of the  Partnership  under the laws of the State of
Montana.

     24.2  Notwithstanding the provisions of Article 24.1, the Partnership shall
not be dissolved and terminated  upon the retirement,  resignation,  bankruptcy,
assignment for the benefit of creditors, dissolution, death, disability or legal
incapacity of a general partner, and its business shall continue pursuant to the
terms and  conditions  of this  Agreement,  if any  general  partner  or general
partners  remain  following  such event;  provided that such  remaining  general
partner or general partners are hereby obligated to continue the business of the
Partnership.  If no general  partner remains after the occurrence of such event,
the  business  of the  Partnership  shall  continue  pursuant  to the  terms and
conditions of this  Agreement,  if, within ninety (90) days after the occurrence
of such event,  a Majority in Interest of the Limited  Partners agree in writing
to  continue  the  business  of  the  Partnership,  and,  if  necessary,  to the
appointment  of one or more persons or entities to be substituted as the general
partner.  In the event the Limited  Partners agree as provided above to continue
the business of the  Partnership,  the new general  partner or general  partners
shall succeed to all of the powers,  privileges  and  obligations of the General
Partner,  and the General  Partner's  interest in the Partnership shall become a
Limited  Partner's  interest  hereunder.  Furthermore,  in the event a remaining
general partner or the Limited  Partners,  as the case may be, agree to continue
the  business of the  Partnership  as provided  herein,  the  remaining  general
partner or the newly appointed general partner or general partners,  as the case
may be, shall take all steps  necessary and appropriate to prepare and record an
amendment to the Certificate of Limited  Partnership to reflect the continuation
of the business of the Partnership and the admission of a new general partner or
general partners, if any.

25. DISTRIBUTION UPON DISSOLUTION.

     Upon the  dissolution  and  termination  of the  Partnership,  the  General
Partner or, if there is none, a representative  of the Limited  Partners,  shall
cause the cancellation of the Partnership's  Certificate of Limited Partnership,
shall  liquidate the assets of the  Partnership,  and shall apply and distribute
the proceeds of such liquidation in the following order of priority:

     (a) First, to the payment of the debts and liabilities of the  Partnership,
and the expenses of liquidation;



                                      -28-
<PAGE>

     (b) Second,  to the creation of any reserves which the General  Partner (or
such  representatives of the Limited Partners) may deem reasonably necessary for
the payment of any  contingent or unforeseen  liabilities  or obligations of the
Partnership or of the General  Partner  arising out of or in connection with the
business and operation of the Partnership; and

     (c) Third,  the balance,  if any,  shall be  distributed to the Partners in
accordance  with the Partners'  positive  Capital  Account  balances  after such
Capital  Accounts  are  adjusted  as  provided  by  Article 13,  and  any  other
adjustments  required by the Final Treasury  Regulations under Section 704(b) of
the Code.  Any general  partner with a negative  Capital  Account  following the
distribution  of  liquidation  proceeds or the  liquidation of its interest must
contribute to the  Partnership an amount equal to such negative  Capital Account
on or before the end of the  Partnership's  taxable  year (or, if later,  within
ninety days after the date of liquidation).  Any capital so contributed shall be
(i)  distributed  to those  Partners with positive  Capital  Accounts until such
Capital  Accounts are reduced to zero,  and/or (ii) used to  discharge  recourse
liabilities.

26. BOOKS OF ACCOUNT, RECORDS AND REPORTS.

     26.1 Proper and complete  records and books of account shall be kept by the
General Partner in which shall be entered fully and accurately all  transactions
and such other  matters  relating to the  Partnership's  business as are usually
entered  into  records  and books of account  maintained  by persons  engaged in
businesses of a like character.  The books and records of the Partnership  shall
be  prepared  according  to the  accounting  method  determined  by the  General
Partner. The Partnership's fiscal year shall be the calendar year. The books and
records shall at all times be maintained at the Partnership's Records Office and
shall be open to the reasonable  inspection  and  examination of the Partners or
their duly authorized representatives during reasonable business hours.

     26.2  Within  ninety  (90) days  after the end of each  Year,  the  General
Partner  shall send to each person who was a Limited  Partner at any time during
such year such tax  information,  including,  without  limitation,  Federal  tax
Schedule  K-1, as shall be  reasonably  necessary  for the  preparation  by such
person of his federal  income tax return.  The  General  Partner  will also make
available to the Limited Partners any other information required by the Act.

     26.3 The General Partner shall maintain at the Partnership's Records Office
copies of the Partnership's  original Certificate of Limited Partnership and any
certificate of amendment,  restated  certificate or certificate of  cancellation
with  respect  thereto and such other  documents as the Act shall  require.  The
General Partner will furnish to any Limited Partner upon request or as otherwise
required  by law a copy of the  Partnership's  original  Certificate  of Limited
Partnership  and  any  certificate  of  amendment,   restated  certificate,   or
certificate of cancellation, if any.




<PAGE>

                                      -29-
     26.4  The  General  Partner  shall,  in its sole  discretion,  make for the
Partnership  any and all  elections  for  federal,  state and local tax purposes
including,  without limitation, any election, if permitted by applicable law, to
adjust the basis of the  Partnership's  property  pursuant to Code Sections 754,
734(b) and 743(b), or comparable provisions of state or local law, in connection
with transfers of interests in the Partnership and Partnership Distributions.

     26.5 The  General  Partner is  designated  as the Tax  Matters  Partner (as
defined in Section  6231 of the Code) and to act in any similar  capacity  under
state or local law, and is authorized  (at the  Partnership's  expense):  (i) to
represent the Partnership  and Partners  before taxing  authorities or courts of
competent  jurisdiction in tax matters  affecting the Partnership or Partners in
their  capacity  as  Partners;  (ii) to extend the  statute of  limitations  for
assessment of tax  deficiencies  against Partners with respect to adjustments to
the  Partnership's  federal,  state or local tax  returns;  (iii) to execute any
agreements  or other  documents  relating  to or  affecting  such  tax  matters,
including  agreements or other  documents that bind the Partners with respect to
such tax matters or otherwise affect the rights of the Partnership and Partners;
and (iv) to  expend  Partnership  funds  for  professional  services  and  costs
associated  therewith.  The General Partner is authorized and required to notify
the federal,  state or local tax authorities of the appointment of a Tax Matters
Partner in the manner provided in Treasury Regulations Section 301.6231(a)(7)-1,
as modified  from time to time.  In its  capacity as Tax  Matters  Partner,  the
General Partner shall oversee the Partnership's tax affairs in the manner which,
in its best judgment, is in the interests of the Partners.

27. NOTICES.

     All notices under this Agreement shall be in writing and shall be deemed to
have been given when delivered personally,  or mailed by certified or registered
mail, postage prepaid, return receipt requested.  Notices to the General Partner
shall be  delivered  at, or mailed  to,  its  principal  office.  Notices to the
Partnership  shall be delivered  at, or mailed to, its  principal  office with a
copy to each of its  business  offices.  Notice  to a Limited  Partner  shall be
delivered to such Limited  Partner,  or mailed to the last address  furnished by
him for such purposes to the General Partner. Limited Partners shall give notice
of a change of address to the  General  Partner in the manner  provided  in this
Article.

28. AMENDMENTS.

     Subject to the  provisions  of Article  28,  this  Agreement  is subject to
amendment  only by written  consent of the  General  Partner  and a Majority  in
Interest of the Limited Partners;  provided, however, the consent of the Limited
Partners shall not be required if such  amendments are ministerial in nature and
do not  contravene  the provisions of Article 29.  Further,  no Limited  Partner
consent  shall be  required  to amend  Schedule A to reflect  the  admission  of
Partners as contemplated by the Offering,  any Dilution Offering or as otherwise
herein permitted.



                                      -30-
<PAGE>

29. LIMITATIONS ON AMENDMENTS.

     Notwithstanding  the  provisions  of  Article  28,  no  amendment  to  this
Agreement shall:

     (a) Enlarge the  obligations of any Partner under this Agreement or convert
the interest in the  Partnership  of any Limited  Partner into the interest of a
general partner or modify the limited liability of any Limited Partner,  without
the consent of such Partner;

     (b) Amend the  provisions  of Article 13, 14, 16 or 25 without the approval
of the General  Partner  and a Majority  in  Interest  of the Limited  Partners;
provided,  however, that the General Partner may at any time amend such Articles
without the consent of the Limited  Partners in order to permit the  Partnership
allocations  to be sustained for federal  income tax purposes,  but only if such
amendments do not materially  affect adversely the rights and obligations of the
Limited Partners,  in which case such amendments may only be made as provided in
this Article 29(b); or

     (c) Amend this Article 29 without the consent of all Partners.

30. MEETINGS, CONSENTS AND VOTING.

     30.1 A meeting of the  Partnership  to consider  any matter with respect to
which the Partners may vote as set forth in this  Agreement may be called by the
General Partner or by Limited  Partners who hold more than  twenty-five  percent
(25%) of the  aggregate  interests  in the  Partnership  held by all the Limited
Partners.  Upon  receipt of a notice  requesting  a meeting  by such  Partner or
Partners  and stating the purpose of the  meeting,  the General  Partner  shall,
within ten (10) days thereafter, give notice to the Partners of a meeting of the
Partnership to be held at a time and place  generally  convenient to the Limited
Partners  on a date not  earlier  than  fifteen  (15) days after  receipt by the
General  Partner of the notice  requesting a meeting.  The notice of the meeting
shall set forth the time, date, location and purpose of the meeting.

     30.2 Any consent of a Partner  required by this  Agreement  may be given as
follows:

     (a) By a written  consent given by the  consenting  Partner and received by
the  General  Partner at or prior to the doing of the act or thing for which the
consent is solicited, or

     (b) By the affirmative  vote by the consenting  Partner to the doing of the
act or thing for which the consent is solicited at any meeting  called  pursuant
to this Article to consider the doing of such act or thing.


                                      -31-

<PAGE>

     30.3 When exercising  voting rights expressly granted under the Articles of
this Agreement,  each Partner shall have that number of votes as is equal to the
Percentage Interest of such Partner at the time of the vote, multiplied by 100.

31. SUBMISSIONS TO THE LIMITED PARTNERS.

     The General Partner shall give the Limited  Partners notice of any proposal
or other  matter  required by any  provision  of this  Agreement or by law to be
submitted for consideration  and approval of the Limited  Partners.  Such notice
shall include any information required by the relevant provision or by law.

32. ADDITIONAL DOCUMENTS.

     Each party  hereto  agrees to execute and  acknowledge  all  documents  and
writings  which the  General  Partner may deem  necessary  or  expedient  in the
creation of this Partnership and the achievement of its purpose.

33. SURVIVAL OF RIGHTS.

     Except as herein otherwise  provided to the contrary,  this Agreement shall
be binding upon and inure to the benefit of the parties hereto,  their successor
and assigns.

34. INTERPRETATION AND GOVERNING LAW.

     When the context in which words are used in this  Agreement  indicates that
such is the intent,  words in the singular  number shall  include the plural and
vise versa;  in addition,  the  masculine  gender shall include the feminine and
neuter  counterparts.  The Article  headings or titles and the table of contents
shall not define,  limit, extend or interpret the scope of this Agreement or any
particular Article. This Agreement shall be governed and construed in accordance
with the laws of the State of Montana  without giving effect to the conflicts of
laws provisions thereof.

35. SEVERABILITY.

     If any  provision,  sentence,  phrase  or  word of  this  Agreement  or the
application  thereof to any person or  circumstance  shall be held invalid,  the
remainder of this Agreement,  or the  application of such  provision,  sentence,
phrase, or word to persons or circumstances,  other than those as to which it is
held invalid, shall not be affected thereby.

36. AGREEMENT IN COUNTERPARTS.

     This Agreement may be executed in several counterparts, each of which shall
be  deemed  an  original,  but all of which  shall  constitute  one and the same
instrument. In addition, this Agreement may contain more than one counterpart of
the signature page and this Agreement may


                                      -32-
<PAGE>

be executed by the affixing of the  signatures of each of the Partners to one of
such  counterpart  signature pages; all of such signature pages shall be read as
though  one,  and they shall have the same force and effect as though all of the
signers had signed a single signature page.

37. THIRD PARTIES.

     The agreements,  covenants and representations contained herein are for the
benefit of the parties  hereto inter se and are not for the benefit of any third
parties including, without limitation, any creditors of the Partnership.

38. POWER OF ATTORNEY.

     Each Limited  Partner hereby makes,  constitutes  and appoints Stan Johnson
and Cheryl Williams,  severally,  with full power of substitution,  his true and
lawful  attorneys-in-fact,  for him and in his name, place and stead and for his
use and benefit to sign and acknowledge,  file and record, any amendments hereto
among the Partners for the further  purpose of executing and filing on behalf of
each Limited Partner,  any and all certificates of limited  partnership or other
documents  necessary to constitute the Partnership or to effect the continuation
of the  Partnership,  the  admission  or  withdrawal  of a general  partner or a
limited partner,  the qualification of the Partnership in a foreign jurisdiction
(or  amendment  to such  qualification),  the  admission of  substitute  Limited
Partners or the  dissolution or termination  of the  Partnership,  provided such
continuation,   admission,   withdrawal,   qualification,   or  dissolution  and
termination are in accordance with the terms of this Agreement.

     The foregoing power of attorney is a special power of attorney coupled with
an interest,  is irrevocable and shall survive the death or legal  incapacity of
each  Limited  Partner.  It may be  exercised  by any one of said  attorneys  by
listing all of the Limited Partners  executing any instrument over the signature
of the  attorney-in-fact  acting for all of them.  The power of  attorney  shall
survive the delivery of an assignment  by a Limited  Partner of the whole or any
portion of his Unit.  In those cases in which the assignee of, or the  successor
to, a  Limited  Partner  owning a Unit has been  approved  by the  Partners  for
admission to the  Partnership  as a  substitute  Limited  Partner,  the power of
attorney  shall survive for the sole purpose of enabling the General  Partner to
execute,   acknowledge  and  file  any  instrument   necessary  to  effect  such
substitution.

     This power of attorney shall not be affected by the subsequent  bankruptcy,
dissolution, incapacity or mental incompetence of any Limited Partner.

39. ARBITRATION.

     Any dispute  arising out of or in  connection  with this  Agreement  or the
breach thereof shall be decided by  arbitration  in Austin,  Texas in accordance
with the then effective commercial arbitration rules of the American Arbitration
Association,   and  judgment   thereof  may  be  entered  in  any  court  having
jurisdiction thereof.


                                      -33-
<PAGE>

40. CREDITORS.

     None of the  provisions  of this  Agreement  shall be for the benefit of or
enforceable by any creditors of the Partnership.

     IN WITNESS  WHEREOF,  the parties have executed  this  Agreement of Limited
Partnership as of the day and year first above written.

                                            GENERAL PARTNER:

                                            SUN MEDICAL TECHNOLOGIES, INC., 
                                             a California corporation


                                            By:  ______________________________
                                                 Stan Johnson, President

ATTEST:

_________________________                                      [CORPORATE SEAL]
Secretary


                                            INITIAL LIMITED PARTNER:


                                            __________________________________
                                            Stan Johnson




                                      -34-


STATE OF ____________________)
                                            )
COUNTY OF __________________                         )

     On this _______ day of ___________, 1998, before me, the undersigned Notary
Public in and for the  County of  _______________  in the State of  ___________,
personally  came Stan  Johnson,  who,  being by me duly  sworn,  said that he is
President of Sun Medical Technologies, Inc., the sole general partner of Big Sky
Urological Services Limited Partnership,  that the seal affixed to the foregoing
instrument in writing is the corporate  seal of the  corporation,  and that said
writing was signed, sworn to, and sealed by him in behalf of said corporation by
its authority duly given. And the said Stan Johnson,  further certified that the
facts set forth in said  writing are true and  correct,  and  acknowledged  said
instrument to be the act and deed of said corporation.

                  WITNESS my hand and notarial seal.


                                    -------------------------------------------

                                    Notary Public
My commission expires:

___________________________

STATE OF ________________                   )
                                            )
COUNTY OF ______________                    )


     I,  _______________________________,  a notary  public in and for the State
and County set forth  above,  do hereby  certify  that Stan  Johnson  personally
appeared before me this _____ day of _________,  1998 and acknowledged and swore
to the due  execution  of the  foregoing  Limited  Partnership  Agreement in his
capacity as the initial limited partner.




                                    ------------------------------------------

                                    Notary Public

My commission expires:

___________________________





                                      -35-
<PAGE>

                           COUNTERPART SIGNATURE PAGE


     By signing this  Counterpart  Signature Page, the undersigned  acknowledges
his or her  acceptance of that certain  Agreement of Limited  Partnership of Big
Sky  Urological  Services  Limited  Partnership,  and his or her intention to be
legally bound thereby.

                  Dated this _________ day of ___________________, 199__.



                                    -------------------------------------------

                                    Signature



                                    -------------------------------------------

                                    Printed Name




STATE OF _______________                    )
                                            )
COUNTY OF _____________                     )


     BEFORE ME, the  undersigned  Notary  Public in and for the State and County
set forth above,  on the _______ day of  __________________,  199__,  personally
appeared  ___________________,  and,  being by me first duly sworn,  stated that
(s)he signed this Counterpart Signature Page for the purpose set forth above and
that the statements contained therein are true.




                                    -------------------------------------------

                                    Signature of Notary Public


                                    -------------------------------------------

                                    Printed Name of Notary

My Commission Expires:

___________________________
[SEAL]


                                      -36-
<PAGE>

                                   SCHEDULE A

                        Schedule of Partnership Interests

                 BIG SKY UROLOGICAL SERVICES LIMITED PARTNERSHIP

           CONTRIBUTIONS OF CAPITAL TO THE PARTNERSHIP AND PERCENTAGE
                                    INTERESTS

                                          Cash                       Percentage
General Partner                       Contribution   Guaranty(1)      Interest 

Sun Medical Technologies, Inc.            $1,448.48   $ 4,500.00          1%
1301 Capital of Texas Highway
Suite C-300
Austin, Texas 78746

Limited Partners as a whole             $143,400.00   $445,500.00        99%


TOTAL:                                  $144,848.48   $450,000.00       100%


(1)  Represents the principal portion of each Partner's guaranty obligation,  as
     each Partner's  obligation under the Guaranty  includes not only principal,
     but also (as provided in the Guaranty)  accrued and unpaid  interest,  late
     payment  penalties  and all costs  incurred by the Bank in  collecting  any
     defaulted obligations.


                                      -37-









                               OPERATING AGREEMENT

                                       OF

                           KENTUCKY I LITHOTRIPSY, LLC


                     (A Kentucky Limited Liability Company)


                             Dated: January 26, 1999










THE LLC MEMBERSHIP  INTERESTS  REPRESENTED BY THIS OPERATING  AGREEMENT HAVE NOT
BEEN REGISTERED WITH THE SECURITIES AND EXCHANGE COMMISSION UNDER THE SECURITIES
ACT OF 1933, AS AMENDED,  OR UNDER THE  SECURITIES  ACTS OR LAWS OF ANY STATE IN
RELIANCE UPON EXEMPTIONS UNDER THOSE ACTS OR LAWS. THE SALE OR OTHER DISPOSITION
OF THE MEMBERSHIP INTERESTS IS RESTRICTED AS STATED IN THIS OPERATING AGREEMENT,
AND IN ANY EVENT IS  PROHIBITED  UNLESS THE LLC  RECEIVES  AN OPINION OF COUNSEL
SATISFACTORY  TO IT AND ITS COUNSEL THAT SUCH SALE OR OTHER  DISPOSITION  CAN BE
MADE WITHOUT  REGISTRATION UNDER THE SECURITIES ACT OF 1933, AS AMENDED, AND ANY
APPLICABLE STATE SECURITIES ACTS AND LAWS. BY ACQUIRING THE MEMBERSHIP  INTEREST
REPRESENTED BY THIS OPERATING AGREEMENT, EACH MEMBER REPRESENTS THAT IT WILL NOT
SELL OR OTHERWISE  DISPOSE OF ITS MEMBERSHIP  INTEREST  WITHOUT  REGISTRATION OR
OTHER  COMPLIANCE WITH THE AFORESAID ACTS AND THE RULES AND  REGULATIONS  ISSUED
THEREUNDER.
<PAGE>

                                TABLE OF CONTENTS
 

ARTICLE I - FORMATION OF THE COMPANY...........................................1
         1.1      Formation....................................................1
         1.2      Name.........................................................1
         1.3      Registered Office and Registered Agent.......................1
         1.4      Principal Place of Business..................................1
         1.5      Purposes and Powers..........................................1
         1.6      Term.........................................................2
         1.7      Nature of Members' Interests.................................2

ARTICLE II - DEFINITIONS.......................................................2
         2.1      Definitions..................................................2

ARTICLE III - MANAGEMENT OF THE COMPANY.......................................11
         3.1      The Manager.................................................11
         3.2      Specific Authority of the Manager...........................12
         3.3      Specific Authority of Manager...............................15
         3.4      Authority as to Third Persons...............................15
         3.5      Compensation and Expenses...................................15
         3.6      Indemnification and Exculpation of the Manager..............15
         3.7      Liability for Return of Capital Contribution................15

ARTICLE IV - EXECUTIVE COMMITTEE..............................................16
         4.1      General Powers.  ...........................................16
         4.2      Number, Term and Qualification..............................16
         4.3      Removal and Replacement.  ..................................16
         4.4      Compensation and Expenses.  ................................17
         4.5      Action by the Executive Committee.  ........................17
         4.6      Action Without Meeting.  ...................................17
         4.7      Meeting by Communications Device.  .........................17
         4.8      Indemnification of Executive Committee Members.  ...........17
         4.9      Liability for Return of Capital Contribution.  .............18

ARTICLE V - RIGHTS AND OBLIGATIONS OF MEMBERS.................................18
         5.1      Names and Addresses of Members..............................18
         5.2      No Management by Members....................................18
         5.3      Election of Manager.........................................18
         5.4      Action by Members...........................................18
         5.5      Operation of Mobile System..................................18
         5.6      Outside Activities..........................................19
         5.7      Disclosure of Con...........................................19
         5.8      Limited Liability...........................................20


                                                      -i-
<PAGE>


ARTICLE VI - CAPITAL CONTRIBUTIONS,
         GUARANTIES AND DILUTION OFFERINGS....................................20
         6.1      Manager Contribution........................................20
         6.2      Physician Members Contribution..............................20
         6.3      No Interest.................................................20
         6.4      Dilution Offerings..........................................20
         6.5      Conditions to the Capital Contributions 
                                       of the Physician Members...............21
         6.6      Capital Accounts............................................21

ARTICLE VII - REPRESENTATIONS, WARRANTIES AND
         COVENANTS OF THE MANAGER.............................................22
         7.1      Manager's Representations and Warranties....................22
         7.2      Manager's Covenants.........................................23

ARTICLE VIII - ALLOCATIONS, ELECTIONS AND REPORTS.............................23
         8.1      Profits and Losses..........................................23
         8.2      Sales Commission............................................23
         8.3      Nonrecourse Deductions......................................23
         8.4      Member Nonrecourse Deductions...............................24
         8.5      Allocations Between Transferor and Transferee...............24
         8.6      Gains from Capital Transactions.............................24
         8.7      Contributed Property........................................24
         8.8      Minimum Gain Chargeback.....................................25
         8.9      Member Minimum Gain Chargeback..............................25
         8.10     Qualified Income Offset.....................................25
         8.11     Gross Income Allocation.....................................26
         8.12     Section 754 Adjustment......................................26
         8.13     Curative Allocations........................................26
         8.14     Compliance with Treasury Regulations........................26
         8.15     Tax Withholding.............................................26

ARTICLE IX - DISTRIBUTIONS....................................................27
         9.1      Company Cash Flow...........................................27
         9.2      Company Refinancing Proceeds................................27
         9.3      Company Sales Proceeds......................................27
         9.4      Distributions in Liquidation................................27
         9.5      Limitation Upon Distributions...............................27

ARTICLE X - TRANSFER OF INTERESTS AND ADMISSION OF MEMBERS....................27
         10.1     Transferability of Membership Interests.....................27
         10.2     Restrictions on Transfers by Physician Members..............28
         10.3     Rights of Transferee........................................29
         10.4     Admission of Members........................................29
         10.5     Amendment of Articles of Organization
                              and Certificate of Qualification................30
         10.6     Fundamental Changes.........................................30

                                                      -ii-
<PAGE>


ARTICLE XI - OPTIONAL PURCHASE OF MEMBERSHIP INTERESTS
         ON CERTAIN EVENTS....................................................30
         11.1     Death.......................................................30
         11.2     Bankruptcy, Insolvency or Assignment for Benefit
                          of Creditors of a Physician Member..................31
         11.3     Breach of Section 5.6.......................................31
         11.4     Domestic Proceeding.........................................32
         11.5     Divestiture Option..........................................32
         11.6     Purchase Price..............................................33
         11.7     Closing of Purchase and Sale................................34
         11.8     Terms and Conditions of Purchase............................35

ARTICLE XII - DISSOLUTION AND LIQUIDATION OF THE COMPANY......................35
         12.1     Dissolution Events..........................................35
         12.2     Continuation................................................36
         12.3     Liquidation.................................................36
         12.4     Articles of Dissolution.....................................36

ARTICLE XIII - MISCELLANEOUS..................................................37
         13.1     Fiscal Year.................................................37
         13.2     Records.....................................................37
         13.3     Reports.....................................................37
         13.4     Reserves....................................................37
         13.5     Notices.....................................................37
         13.6     Amendments..................................................37
         13.7     Additional Documents........................................37
         13.8     Representations of Members..................................38
         13.9     Survival of Rights..........................................38
         13.10    Interpretation and Governing Law............................38
         13.11    Severability................................................38
         13.12    Agreement in Counterparts...................................38
         13.13    Tax Matters Partner.........................................38
         13.14    Third Parties...............................................38
         13.15    Power of Attorney...........................................39
         13.16    Arbitration.................................................39


Attachments:

Schedule I - Names,  Initial Capital  Contributions and Percentage  Interests of
the Members

                                                      -iii-
<PAGE>

                               OPERATING AGREEMENT

                                       OF

                           KENTUCKY I LITHOTRIPSY, LLC


THIS  OPERATING  AGREEMENT  of KENTUCKY I  LITHOTRIPSY  LLC (the  "Company"),  a
limited liability  company organized  pursuant to the Delaware Limited Liability
Company Act, is executed effective as of the ____ day of ______________,  199__,
by and among the Company and the persons executing this Agreement as the initial
Members (as defined below).

                      ARTICLE I - FORMATION OF THE COMPANY

1.1 Formation. The Company was formed on September 23, 1997 upon the filing with
the  Secretary  of State of the  Articles of  Organization  of the  Company.  In
consideration  of the mutual premises and covenants  contained  herein and other
good and valuable consideration,  the receipt and sufficiency of which is hereby
acknowledged,  the parties  hereto agree that the rights and  obligations of the
parties and the  administration and termination of the Company shall be governed
by this Agreement, the Articles of Organization and the Act.

1.2 Name.  The name of the  Company  is as set  forth on the cover  page of this
Agreement.  The Manager may change the name of the Company  from time to time as
it deems advisable,  provided that appropriate  amendments to this Agreement and
the  Articles of  Organization  and  necessary  filings  under the Act are first
obtained.

1.3 Registered  Office and Registered  Agent.  The Company's  registered  office
shall be at Kentucky Home Life Building,  Louisville,  Kentucky,  40202, and the
name of its initial  registered  agent at such address shall be The  Corporation
Trust Company.

1.4 Principal Place of Business.  The principal place of business of the Company
shall be located at 1301 Capital of Texas Highway,  Suite C-300,  Austin, Texas
78746, or at any other place or places as the Manager may from time to time deem
necessary or advisable.

1.5 Purposes and Powers.

(a) The purpose and  business  of the Company  shall  be:  (i) to operate one or
more extracorporeal shock-wave lithotripters (or any other renal stone treatment
equipment) for the lithotripsy of renal stones primarily in central Kentucky, or
in such other  location(s)  as the  Manager,  with the consent of the  Executive
Committee,  may  determine to be in the best  interests of the Company;  (ii) to
acquire and  operate in the future any other  therapeutic  urological  device or
equipment  provided that such device have FDA premarket  approval at the time it
is acquired by the Company; (iii) to acquire an interest in any business entity,
including, without limitation, a limited partnership,  limited liability company
or corporation,  that engages in any business activity described in this Section
1.5; and (iv) to
                                                      -1-
<PAGE>

engage in any and all activities  incidental or related to the  foregoing,  upon
and subject to the terms and conditions of this Agreement.

(b) The Company  shall have any and all powers which are  necessary or desirable
to carry out the purposes  and  business of the Company,  to the extent the same
may be legally  exercised  by limited  liability  companies  under the Act.  The
Company shall carry out the foregoing  activities  pursuant to the  arrangements
set forth in the Articles of Organization and this Agreement.

1.6  Term.  The  Company  shall  continue  in  existence  until the close of the
Company's   business  on  December  31,  2047  as  specified  in  the  Company's
Certificate  of  Formation,  unless the  Company is  earlier  dissolved  and its
affairs wound up in accordance with the provisions of this Agreement or the Act.

1.7 Nature of Members' Interests. The Membership Interests of the Members in the
Company shall be personal property for all purposes.  Legal title to all Company
assets  shall be held in the  name of the  Company.  Neither  any  Member  nor a
successor,  representative or assign of such Member, shall have any right, title
or interest in or to any Property owned by the Company or the right to partition
any Property  owned by the Company.  Membership  Interests  are evidenced by the
execution of this Agreement by the Members.


                            ARTICLE II - DEFINITIONS

2.1  Definitions.  The  following  terms used in this  Agreement  shall have the
following meanings (unless otherwise expressly provided herein):

2.1.1 "Act" means the Kentucky Limited Liability Company Act, as the same may be
amended from time to time.

2.1.2 "Adjusted Capital Account Deficit" means, with respect to any Member,  the
deficit  balance,  if any, in such Member's Capital Account as of the end of the
relevant Fiscal Year, after giving effect to the following adjustments:

(i) Credit to such Capital Account any amounts to which such Member is obligated
to restore or is deemed to be obligated to restore  pursuant to the  penultimate
sentences of Treasury Regulations Sections 1.704-2(g)(1) and 1.704-2(i)(5); and

(ii) Debit to such  Capital  Account  the items  described  in  Sections  1.704-
1(b)(2)(ii)(d)(4),  1.704-1(b)(2)(ii)(d)(5),  and 1.704-1(b)(2)(ii)(d)(6) of the
Treasury Regulations.

The foregoing  definition  of Adjusted  Capital  Account  Deficit is intended to
comply  with the  provisions  of Section  1.704-1(b)(2)(ii)(d)  of the  Treasury
Regulations and shall be interpreted consistently therewith.

                                                      -2-
<PAGE>


2.1.3 "Adjusted Capital  Contributions" means, as of any day, a Member's Capital
Contributions adjusted as follows:

(i) Increased by the amount of any Company liabilities which, in connection with
Distributions, are assumed by such Member or are secured by any Company Property
distributed to such Member; and

(ii)  Reduced  by the  amount  of cash  and the  value of any  Company  property
distributed  to such  Member and the amount of any  liabilities  of such  Member
assumed by the Company or which are secured by any property  contributed by such
Member to the Company.


In the event any Member  transfers  all or any portion of his or her  Membership
Interest in accordance  with the terms of this Agreement,  his transferee  shall
succeed to the Adjusted Capital  Contribution of the transferor to the extent it
relates to the transferred Membership Interest or portion thereof.

2.1.4  "Affiliate"  of a  specified  Person  means  (i) any  Person  directly or
indirectly controlling, controlled by or under common control with the specified
Person;  (ii) any Person owning or controlling  10% or more of the  outstanding
voting interest of such specified Person; (iii) any officer, director or partner
of such  specified  Person;  and  (iv) if  the  specified  Person is an officer,
director  or  partner,  any entity for which the  specified  Person acts in such
capacity.

2.1.5 "Agreement" means this Operating Agreement, as amended from time to time.

2.1.6 "Appraiser" means an independent appraiser,  investment banker,  financial
analyst  or other  valuation  expert  with at least 5 years  experience  valuing
closely held businesses.

2.1.7 "Bank" means First Citizens Bank & Trust Company.

2.1.8  "Articles  of  Organization"  means the Articles of  Organization  of the
Company filed with the  Secretary of State,  as amended or restated from time to
time.

2.1.9 "Bankruptcy" means with respect to a Member, when such Member (i) makes an
assignment  for the benefit of  creditors;  (ii) files a  voluntary  petition in
bankruptcy;  (iii) is adjudged a bankrupt or insolvent,  or has entered  against
him an order for relief, in any bankruptcy or insolvency proceeding;  (iv) files
a petition  or answer  seeking  for  himself  any  reorganization,  arrangement,
composition, readjustment,  liquidation, dissolution or similar relief under any
statute,  law or regulation;  (v) files an answer or other pleading admitting or
failing to contest the material  allegations  of a petition filed against him in
any proceeding of the type described in clauses  (i)-(iv)  above; or (vi) seeks,
consents  to  or  acquiesces  in  the  appointment  of a  trustee,  receiver  or
liquidator of the Member or of all or any  substantial  part of his  properties.
"Bankruptcy"  shall also be deemed to have  occurred  to a Member 120 days after
the commencement of any proceeding  against such Member seeking  reorganization,
arrangement,  composition,  readjustment,  liquidation,  dissolution  or similar
relief under any statute,  law or  regulation,  if the  proceeding  has not been
dismissed,  or if within 90 days after the  appointment  without  his consent or
acquiescence of a trustee, receiver or liquidator of the Member or of all or any
                                                      -3-
<PAGE>

substantial part of his properties, the appointment is not vacated or stayed, or
within 90 days after the  expiration of any such stay,  the  appointment  is not
vacated.
2.1.10 "Buy-Sell  Event" has the meaning assigned to it in Section 11.1. 

2.1.11 "Buy-Sell Notice" has the meaning assigned to it in Section 11.2.

2.1.12 "Capital Account" means, with respect to any Member,  the capital account
maintained for such Member in accordance with Section 6.12 of this Agreement.

2.1.13 "Capital  Contribution" means all contributions to the Company of cash or
property  (valued  for this  purpose  at  initial  gross  fair  market  value as
determined by the  contributing  Member and the Manager) made by a Member or his
or her predecessor in interest which shall include,  without  limitation,  those
contributions made pursuant to Article VI of this Agreement.

2.1.14 "Capital Transaction" means any transactions undertaken by the Company or
by any company or partnership in which the Company owns an interest, which, were
it to  generate  proceeds,  would  produce  Company  Sales  Proceeds  or Company
Refinancing Proceeds.

2.1.15  "Code" means the Internal  Revenue Code of 1986, as amended from time to
time (and any corresponding provisions of succeeding law).

2.1.16  "Company Cash Flow" for any period means the excess,  if any, of (A) the
sum of (i) all gross  receipts from any source for such period,  other than from
Company loans,  Capital  Transactions  and Capital  Contributions,  and (ii) any
funds released by the Company from previously established reserves, over (B) the
sum of (i) all cash expenses paid by the Company for such period  (including any
compensation to the Managers and their Affiliates); (ii) all amounts paid by the
Company in such period on account of the  amortization  of the  principal of any
debts  or  liabilities  of  the  Company  (including  loans  from  any  Member);
(iii) capital  expenditures of the Company;  and (iv) a  reasonable  reserve for
future  expenditures as provided by Section 13.4;  provided,  however,  that the
amounts referred to in (B) (i), (ii) and (iii) above shall be taken into account
only to the extent not  funded by  Capital  Contributions,  loans or paid out of
previously  established  reserves.  Such term shall also include all other funds
deemed  available for  distribution  and  designated as Company Cash Flow by the
Managers.

2.1.17  "Company  Minimum  Gain" means gain as defined in  Treasury  Regulations
Section 1.704-2(d).

2.1.18  "Company  Refinancing  Proceeds"  means (i) the cash  realized  from the
financing or refinancing of all or any portion of any Company  assets,  less the
retirement of any related secured loans, the payment of all expenses relating to
the  transaction  and the  establishment  of  such  reasonable  reserves  as the
Managers  shall  deem  prudent or  necessary  and (ii) the  Company's  allocable
portion of cash realized by an entity in which the Company owns an interest from
such entity financing or refinancing all or any portion of such entity's assets,
less the retirement of any related secured loans and the payment of all expenses
relating to such transaction.
                                                      -4-
<PAGE>

2.1.19  "Company  Sales  Proceeds"  means (i) the cash  realized  from the sale,
exchange,  condemnation,  casualty or other disposition of all or any portion of
any Company assets not in the ordinary  course of business,  less the retirement
of any  related  secured  loans,  the  payment of all  expenses  relating to the
transaction and the  establishment  of such reasonable  reserves as the Managers
shall deem prudent or necessary and (ii) the Company's allocable portion of cash
realized  by an entity  in which the  Company  owns an  interest  from the sale,
exchange,  condemnation,  casualty or other disposition of all or any portion of
such entity's assets not in the ordinary course of business, less the retirement
of any related  secured  loans and the payment of all expenses  relating to such
transaction.

2.1.20  "Depreciation"  means,  for each  Fiscal  Year,  an amount  equal to the
depreciation,  amortization,  or other cost recovery  deduction  allowable  with
respect to an asset for such Fiscal  Year,  except that if the Gross Asset Value
of an Asset differs from its adjusted  basis for federal  income tax purposes at
the beginning of such Fiscal Year,  Depreciation  shall be an amount which bears
the same ratio to such  beginning  Gross Asset  Value as the federal  income tax
depreciation,  amortization,  or other cost  recovery  deduction for such Fiscal
Year bears to such beginning adjusted tax basis; provided,  however, that if the
adjusted  basis for federal  income tax purposes of an asset at the beginning of
such Fiscal Year is zero,  Depreciation  shall be determined  with  reference to
such  beginning  Gross Asset Value using any reasonable  method  selected by the
Managers.

2.1.21  "Dilution  Offering" means, as provided in Article VI of this Agreement,
the future  offering of  additional  Membership  Interests in the Company by the
Manager.  Except as otherwise  provided in Article VI, any  successful  Dilution
Offering  will  proportionately  reduce  the  Percentage  Interests  of the then
current Members in the Company.

2.1.22  "Distribution" means any money or other property distributed to a Member
with  respect to the  Member's  Membership  Interest,  but shall not include any
payment to a Member for materials or services  rendered nor any reimbursement to
a Member for expenses permitted in accordance with this Agreement.

2.1.23 "Domestic Proceeding" means any divorce, annulment, separation or similar
domestic proceeding between a married couple.

2.1.24 "Encumbrance" means any lien, pledge, encumbrance,  collateral assignment
or hypothecation.

2.1.25 "Equipment" means the initial equipment to be acquired by the Company for
the operation of the Mobile Lithotripsy System. The initial equipment to be used
in the operation of the Mobile  Lithotripsy  System will include the Trailer,  a
tractor truck, the Dornier HM3 lithotripter and miscellaneous  medical equipment
and supplies.

2.1.26  "Executive  Committee"  means the  committee  made up of four  Physician
Members and a  representative  of the  Manager,  each  appointed by the Manager,
which has certain management authority as set forth in Article IV.

2.1.27 "FDA" means the United States Food and Drug Administration.
                                                      -5-
<PAGE>

2.1.28  "Fiscal Year" means an annual  accounting  period ending  December 31 of
each year during the term of the  Company,  unless  otherwise  specified  by the
Managers.

2.1.29 "Gains from Capital Transactions" means the gains realized by the Company
as a result of or upon any sale, exchange,  condemnation or other disposition of
capital  assets of the Company or any entity in which the  Company  shall own an
interest  (which  assets shall include Code Section 1231 assets and all real and
personal  property)  or as a result of or upon the damage to or  destruction  of
such capital assets.

2.1.30  "Gross  Asset  Value"  means,  with  respect to any asset,  the  asset's
adjusted basis for federal income tax purposes, except as follows:

(i) The initial  Gross Asset Value of any asset  contributed  by a Member to the
Company shall be the gross fair market value of such asset, as determined by the
contributing Member and the Managers,  provided that, if the contributing Member
is a Manager,  the determination of the fair market value of a contributed asset
shall be determined by appraisal;

(ii) The Gross  Asset  Values of all Company  assets  shall be adjusted to equal
their respective gross fair market values, as determined by the Managers,  as of
the  following  times:  (a) the  acquisition  of an  additional  interest in the
Company  (other than upon the initial  formation  of the  Company) by any new or
existing  Member in exchange  for more than a de minimis  Capital  Contribution;
(b) the distribution by the Company to a Member of more than a de minimis amount
of Company property as consideration for an interest in the Company; and (c) the
liquidation  of the Company within the meaning of Treasury  Regulations  Section
1.704-1(b)(2)(ii)(g);  provided,  however,  that  the  adjustments  pursuant  to
clauses  (a) and  (b)  above  shall  be made  only  if the  Managers  reasonably
determine  that such  adjustments  are necessary or  appropriate  to reflect the
relative economic interests of the Members in the Company;

(iii) The Gross Asset Value of any Company asset distributed to any Member shall
be adjusted  to equal the gross fair  market  value of such asset on the date of
distribution as determined by the  distributee and the Managers,  provided that,
if the distributee is a Manager,  the  determination of the fair market value of
the distributed asset shall be determined by appraisal; and

(iv) The Gross Asset Values of Company  assets shall be increased (or decreased)
to reflect any adjustments to the adjusted basis of such assets pursuant to Code
Section  734(b)  or Code  Section  743(b),  but  only to the  extent  that  such
adjustments are taken into account in determining  Capital Accounts  pursuant to
Treasury  Regulations Section  1.704-1(b)(2)(iv)(m)  and Sections 2.1.48(vi) and
7.11 hereof;  provided,  however,  that Gross Asset Values shall not be adjusted
pursuant to this Section 2.1.29(iv) to the extent the Managers determine that an
adjustment  pursuant to Section 2.1.29(ii) hereof is necessary or appropriate in
connection  with a  transaction  that would  otherwise  result in an  adjustment
pursuant to this Section 2.1.29(iv).
                                                      -6-
<PAGE>

If the Gross Asset Value of an asset has been determined or adjusted pursuant to
Section 2.1.29(i),  Section 2.1.29(ii), or Section 2.1.29(iv) hereof, such Gross
Asset Value shall thereafter be adjusted by the Depreciation  taken into account
with respect to such asset for purposes of computing Profits, Gains from Capital
Transactions or Losses.

     2.1.31  "Guaranty"  means the  Guaranty  Agreement  pursuant  to which each
Member will  guarantee a portion of the  Company's  obligation to the Bank under
the Loan. The form of Guaranty Agreement is included in the Subscription  Packet
accompanying the Memorandum.

     2.1.32 "Loan" means the loan of $550,000 from the Bank to the Company. Loan
proceeds  will  be  used  by the  Company  to (i)  acquire  a used  Dornier  HM3
lithotripter (up to $100,000),  (ii) acquire and upfit a mobile Trailer to house
the  lithotripter  (up to  $325,000),  (iii)  acquire a used  tractor  truck for
hauling the Trailer housing the lithotripter (up to $50,000),  and (iv) purchase
additional miscellaneous equipment (up to $30,000), (v) pay the applicable state
sales and use taxes on the  lithotripter  Trailer,  tractor truck and additional
miscellaneous  equipment  (estimated  to be $30,300),  and (vi) serve as working
capital (estimated at $14,700).

     2.1.33 "Losses from Capital  Transactions" means the losses realized by the
Company  as a  result  of or upon  any  sales  exchange,  condemnation  or other
disposition  of the capital  assets of the Company  (which  include Code Section
1231 assets) or as a result of or upon the damage or destruction of such capital
assets.

     2.1.34  "Management  Agent"  means  Lithotripters,  Inc.,  a  wholly  owned
subsidiary of Prime and an Affiliate of the Manager.

     2.1.35  "Management  Agreement"  means the agreement  pursuant to which the
Management Agent will provide the daily management services to the Company.

     2.1.36 "Majority in Interest"  means,  with respect to any referenced group
of Members, a combination of any of such Members who, in the aggregate, own more
than  fifty  percent  (50%)  of the  Percentage  Interests  owned by all of such
referenced group of Members.

     2.1.37 "Manager" means Prime Kidney Stone Treatment,  Inc. ("PKST"),  a New
Jersey Corporation,  the initial Manager of the Company, and any other Person or
Persons that  succeeds  such  Manager in its capacity as Manager,  and any other
Person elected to act as Manager of the Company as provided herein. PKST is also
a member of the Company.

     2.1.38 "Member" means each Person  designated as a member of the Company on
Schedule I hereto,  or any additional member admitted as a member of the Company
in accordance with Article IX.  "Members" refers to such Persons as a group, and
shall include the Manager, PKST, where no distinction is required by the context
in which the term is used herein.

     2.1.39 "Member  Minimum Gain" means an amount,  with respect to each Member
Nonrecourse  Debt,  equal to the Company  Minimum Gain that would result if such
Member Nonrecourse

                                       -7-
<PAGE>

Debt were treated as a Nonrecourse  Liability,  determined  in  accordance  with
Treasury Regulations Section 1.704-2(i).

     2.1.40  "Member  Nonrecourse  Debt"  means  any  nonrecourse  debt (for the
purposes of Treasury  Regulations Section 1.1001-2) of the Company for which any
Member  bears the  "economic  risk of loss,"  within  the  meaning  of  Treasury
Regulations Section 1.752-2.

     2.1.41 "Member  Nonrecourse  Deductions"  means  deductions as described in
Treasury  Regulations  Section  1.704-2(i).  The  amount of  Member  Nonrecourse
Deductions with respect to a Member  Nonrecourse Debt for any Fiscal Year equals
the  excess,  if any, of (A) the net  increase,  if any, in the amount of Member
Minimum Gain  attributable  to such Member  Nonrecourse  Debt during such Fiscal
Year, over (B) the aggregate amount of any Distributions during that Fiscal Year
to the Member that bears the economic  risk of loss for such Member  Nonrecourse
Debt to the extent  such  Distributions  are from the  proceeds  of such  Member
Nonrecourse  Debt and are  allocable  to an  increase  in  Member  Minimum  Gain
attributable  to such Member  Nonrecourse  Debt,  determined in accordance  with
Treasury Regulations Section 1.704-2(i).

     2.1.42 "Membership Interest" means all of a Member's rights in the Company,
including  without  limitation,  the Member's share of the Profits and Losses of
the Company, the right to receive Distributions, any right to vote and any right
to  participate in the management of the Company as provided in the Act and this
Agreement.

     2.1.43 "Memorandum" means the Confidential  Private Placement Memorandum of
the Company dated October 14, 1998, as amended or as supplemented.

     2.1.44 "Mobile Lithotripsy System" means the Trailer and tractor truck with
the installed and operational Dornier HM3 lithotripter.

     2.1.45  "Nonrecourse  Deductions" means deductions as set forth in Treasury
Regulations Section  1.704-2(b)(1).  The amount of Nonrecourse  Deductions for a
given Fiscal Year equals the excess, if any, of (A) the net increase, if any, in
the amount of  Company  Minimum  Gain  during  such  Fiscal  Year,  over (B) the
aggregate amount of any  Distributions  during such Fiscal Year of proceeds of a
Nonrecourse Liability that are allocable to an increase in Company Minimum Gain,
determined   according  to  the  provisions  of  Treasury   Regulations  Section
1.704-2(h).

     2.1.46  "Nonrecourse  Liability"  means any Company  liability  (or portion
thereof)  for which no Member  bears the  "economic  risk of loss,"  within  the
meaning of Treasury Regulations Section 1.752-2.

     2.1.47  "Offering"  means  the  initial  offering  of Units in the  Company
pursuant to the Memorandum.

     2.1.48  "Percentage  Interest"  means the  interest  of each  Member in the
Company,  to be determined in the case of a Physician Member by reference to his
or her Unit ownership based upon the Physician  Members holding an aggregate 80%
Percentage Interest in the Company, with each Unit sold

                                       -8-
<PAGE>

representing  an initial 1%  interest.  The  Manager  will own a 20%  Percentage
Interest  in the  Company.  As  provided  in Article  VI, a  Physician  Member's
Percentage  Interest may be reduced by a future Dilution Offering.  The Members'
Percentage  Interests  in the  Company as of the date hereof are as set forth in
Schedule I attached hereto.  Any future  adjustments in the Member's  Percentage
Interests,  due to future Dilution Offerings or otherwise,  will be reflected by
revisions to Schedule A.

     2.1.49 "Person" means an individual,  a foreign or domestic corporation,  a
professional  corporation,  a  partnership,  a  limited  partnership,  a limited
liability  company,  a foreign  limited  liability  company,  an  unincorporated
association, or other legal entity.

     2.1.50  "Physician  Members" means those investors in the Units admitted to
the  Company,  and any  Person  admitted  as a  substitute  Physician  Member in
accordance  with  the  provisions  herein,  provided  that the  Manager  and its
Affiliates shall not be considered Physician Members.

     2.1.51  "PKST"  means Prime  Kidney  Stone  Treatment,  Inc.,  a New Jersey
corporation. PKST is the sole Manager of the Company.

     2.1.52  "Prime"  means  Prime  Medical  Services,  Inc.,  a  publicly  held
corporation and parent of both the Manager and the Management Agent.

     2.1.53 "Profits and Losses" means, for each Fiscal Year, an amount equal to
the Company's  taxable income or loss for such Fiscal Year (excluding Gains from
Capital  Transactions),  determined in accordance  with Code Section 703(a) (for
this  purpose,  all items of income,  gain,  loss,  or deduction  required to be
stated  separately  pursuant  to Code  Section  703(a)(1)  shall be  included in
taxable income or loss), with the following adjustments:

     (i) Any income of the Company  that is exempt from  federal  income tax and
not  otherwise  taken into account in computing  Profits and Losses  pursuant to
this definition  (excluding Gains from Capital  Transactions)  shall be added to
such taxable income or loss;

     (ii) Any expenditures of the Company described in Code Section 705(a)(2)(B)
or  treated as Code  Section  705(a)(2)(B)  expenditures  pursuant  to  Treasury
Regulations Section  1.704-1(b)(2)(iv)(i),  and not otherwise taken into account
in  computing  Profits  or  Losses  pursuant  to this  Section  2.1.48  shall be
subtracted from such taxable income or loss;

     (iii) In the event the Gross Asset  Value of any Company  asset is adjusted
pursuant to Section 2.1.27,  the amount of such  adjustment  shall be taken into
account  as gain or loss from the  disposition  of such  asset for  purposes  of
computing Profits or Losses;

     (iv) Gain or loss resulting from any  disposition of Company  property with
respect to which gain or loss is  recognized  for  federal  income tax  purposes
shall be computed by reference to the Gross Asset Value of the property disposed
of,

                                       -9-
<PAGE>

notwithstanding  that the adjusted tax basis of such  property  differs from its
Gross Asset Value;

     (v) In lieu of the  depreciation,  amortization,  and other  cost  recovery
deductions  taken into account in computing such taxable  income or loss,  there
shall be taken into account  Depreciation  for such fiscal year or other period,
computed in accordance with the definition of Depreciation set out hereof;

     (vi) To the extent an  adjustment  to the adjusted tax basis of any Company
asset  pursuant  to Code  Section  734(b) or Code  Section  743(b)  is  required
pursuant to Treasury  Regulations  Section  1.704-1(b)(2)(iv)(m)(4)  to be taken
into account in determining Capital Accounts as a result of a distribution other
than in  liquidation of a Member's  interest in the Company,  the amount of such
adjustment shall be treated as an item of gain (if the adjustment  increases the
basis of the asset) or loss (if the adjustment decreases the basis of the asset)
from the  disposition  of the asset and shall be taken into account for purposes
of computing Profits or Losses;

     (vii) Notwithstanding any other provision of this Section 2.1.48, any items
which are  specially  allocated  pursuant to Sections  7.2,  7.3, 7.7, 7.8, 7.9,
7.10,  7.11 or 7.12 hereof shall not be taken into account in computing  Profits
or Losses.

     The  amounts  of the  items of  Company  income,  gain,  loss or  deduction
available to be specially  allocated  pursuant to Sections  7.2,  7.3, 7.7, 7.8,
7.9, 7.10,  7.11 or 7.12 hereof shall be determined by applying rules  analogous
to those set forth in Sections (i) through (vi) above.

     2.1.54 "Property" means any and all property acquired by the Company,  real
and/or personal (including, without limitation, intangible property).

     2.1.55  "Pro  Rata  Basis"  means  in  connection  with  an  allocation  or
distribution in proportion to the respective  Percentage  Interests or the class
of Members to which reference is made.

     2.1.56 "Sales Agency  Agreement" means the sales agency  agreement  through
which MedTech Investments, Inc., an Affiliate of the Manager and a broker-dealer
company  registered with the Securities and Exchange  commission and a member of
the National  Association of Securities  Dealers,  Inc. shall offer and sell the
membership interest of the Company pursuant to the Memorandum.

     2.1.57  "Sales  Commission"  means the  $250.00  sales  commission  paid to
MedTech  Investments,  Inc. for each Unit sold to parties other than the Manager
and its Affiliates.

     2.1.58 "Secretary of State" means the Secretary of State of Kentucky.

     2.1.59 "Service" means the Internal Revenue Service.

     2.1.60  "Service  Area"  means the  geographic  region in which the Company
operations  are expected to be  conducted  and which is  anticipated  to consist
primarily of central Kentucky.

                                      -10-
<PAGE>

     2.1.61 "Tax Matters Partner" means the Person designated by the Managers as
the "tax matters partner," as that term is defined in the Code.

     2.1.62 "Trailer" means the new mobile trailer  manufactured and upfitted by
AK Associates, Inc. to house the lithotripter.

     2.1.63 "Transfer" means sell, assign,  transfer, lease or otherwise dispose
of property, including without limitation an interest in the Company.

     2.1.64  "Treasury   Regulations"  means  the  Income  Tax  Regulations  and
Temporary  Regulations  promulgated  under the Code, as such  regulations may be
amended from time to time  (including  corresponding  provisions  of  succeeding
regulations).

     2.1.65  "Units"  means the 80 equal  membership  interests  in the  Company
offered to the  Memorandum  for a price per Unit of $2,500 in cash and  personal
guaranty of 1% of the Company's obligations under the Loan.

     2.1.66 "Withdrawing Member" has the meaning assigned to it in Article 11.


                     ARTICLE III - MANAGEMENT OF THE COMPANY

     3.1 The Manager.

     (a) Except as otherwise may be expressly  provided in this  Agreement,  the
Articles  of  Organization  or  the  Act,  all  decisions  with  respect  to the
management of the business and affairs of the Company shall be made by action of
the  Manager.  The Manager  shall have full and  complete  authority,  power and
discretion  to manage and  control  the  business  of the  Company,  to make all
decisions  regarding  those  matters  and to  perform  any and all other acts or
activities  customary or incident to the  management of the Company's  business,
except only as to those acts and things as to which  approval  by the  Executive
Committee  and/or the  Members is  expressly  required  by this  Agreement.  The
Manager  may  delegate  responsibility  for the day-to-  day  management  of the
Company to any Person retained by the Manager including Affiliates of Members or
the Managers who shall have and exercise on behalf of the Company all powers and
rights necessary or convenient to carry out such management responsibilities.

     (b) The  Manager  shall be under no duty to  devote  all of its time to the
business of the Company,  but shall devote only such time as it deems  necessary
to conduct  the  Company  business  and to operate  and manage the Company in an
efficient manner.

     (c) The Manager may charge to the Company all ordinary and necessary  costs
and expenses, direct and indirect,  attributable to the activities,  conduct and
management of the business of the Company. The costs and expenses to be borne by
the Company shall include, but are not limited to, all expenditures  incurred in
acquiring  and financing  the  Equipment or other  Company  property,  legal and
accounting fees and expenses, salaries of employees of the

                                      -11-
<PAGE>

Company,  consulting and quality assurance fees paid to independent contractors,
insurance premiums and interest.

     (d) The Manager  shall  serve as Manager  until the earlier to occur of its
resignation or removal.  If the Manager shall be finally  adjudged by a court of
competent jurisdiction to be liable to the Members or the Company for any act of
gross  negligence or willful  misconduct in the  performance of its duties under
the terms of this Agreement,  the Manager may be removed and another substituted
with the consent of all of the Physician Members.  With the unanimous consent of
the  Members,  the  Manager  may also be  removed  for cause  for the  following
reasons:

     (i) The failure to establish  and maintain a quality  assurance and outcome
analysis program aimed at improving the quality of care of all Company patients;

     (ii) The  failure  to make  adequate  and  customary  arrangements  for the
maintenance of the Mobile Lithotripsy  System, or to provide for the disposables
and other supplies necessary for Company operations;

     (iii) The failure to make  reasonable  arrangements  for the timely billing
for the Company's services and to timely collect for such services;

     (iv) The  failure to engage  drivers  and  lithotripsy  technicians  and to
arrange  for the  engagement  of all  other  nonphysician  personnel  reasonably
necessary to staff and operate the Mobile Lithotripsy System, including, without
limitation, nurses, secretaries and receptionists;

     (v) The failure to establish an Executive Committee;

     (vi)  The  failure  to  timely  make  reasonable   repairs,   replacements,
alterations,  additions and  improvements  to the  equipment  used in the Mobile
Lithotripsy System; and

     (vii) The  failure  to make  reasonable  arrangements  for the  travel  and
location itinerary of the Mobile Lithotripsy System in the Service Area.

     Consent to the removal of the Manager  shall be evidenced by a  certificate
of  removal  signed  by all of the  Members.  In the event of  removal,  the new
Manager shall succeed to all of the powers,  privileges  and  obligations of the
Manager.  The removed  Manager shall become a Member and shall maintain its same
Percentage Interest in the Company notwithstanding anything contained in the Act
to the  contrary.  In addition,  in the event of removal,  the new Manager shall
take all steps  necessary and  appropriate to prepare and record an amendment to
the  Articles  of  Organization  to reflect  the  removal of the Manager and the
admission of such new Manager.

     3.2 Specific Authority of the Managers.  Without limiting the generality of
Section 3.1 above,  and except as otherwise  prohibited by this Agreement or the
Act, the Manager or Managers shall

                                      -12-
<PAGE>

have and  exercise on behalf of the Company all powers and rights  necessary  or
convenient to carry out the purposes of the Company.  Such powers shall include,
without limitation, the following:

     (a) To acquire a Mobile Lithotripsy System;

     (b) To purchase,  hold, manage and dispose of Company assets, including the
purchase,  exchange,  trade, or sale of Company assets at such price, or amount,
for cash, securities or other property and upon such terms, as the Manager deems
to be in the best  interests of the Company;  provided,  that should the Company
assets be exchanged or traded for securities or other property the Manager shall
have the same  powers  with  regard  to such  property  as it does  towards  the
property traded;

     (c) To  exercise  the option of the  Manager or the  Company to  purchase a
Member's Membership Interest pursuant to Article XI;

     (d) To determine  the travel  itinerary  and site  locations for the Mobile
Lithotripsy System or other Company technology;

     (e)  Subject to the  limitations  set forth in Section  4.1, to acquire (i)
additional  Mobile  Lithotripter  Systems,  (ii) any other assets related to the
provision  of  lithotripsy  treatment  services,  or (iii) any  other  assets or
equipment or an interest in another entity  consistent  with the purposes of the
Company as provided in Section 1.5 (collectively,  the "Additional  Assets"), at
such times and at such price and upon such terms,  as the Manager deems to be in
the best interest of the Company;

     (f) Subject to the  limitations  set forth in Section  4.1, to borrow money
for any Company purpose and, if security is required therefor, to subject to any
security  device  any  portion  of  the  Property  of  the  Company,  to  obtain
replacements  of any  other  security  device,  to  repay,  in whole or in part,
refinance,  increase,  modify,  consolidate  or extend any  Encumbrance or other
security device;

     (g) To deposit,  withdraw, invest, pay, retain (including the establishment
of reserves) and distribute the Company funds in accordance  with the provisions
of this Agreement;

     (h)  To  consent  to  the  modifications,   renewal  or  extension  of  any
obligations  to the  Company  of any  Person  or of any  agreement  to which the
Company is a party or of which it is a beneficiary;

     (i) To enter into and carry out  contracts  and  agreements  and any or all
other documents and instruments,  and to do any and all such other things as may
be in furtherance of Company purposes or necessary or appropriate to the conduct
of the Company activities;

     (j) To adjust, compromise, settle or refer to arbitration any claim against
or in favor of the Company,  and to institute,  prosecute and defend any actions
or proceedings relating to the Company, its business and property;

                                      -13-
<PAGE>

     (k) To make all decisions  related to principles  and methods of accounting
and federal income tax elections;

     (l)  Generally  to possess  and  exercise  any and all  rights,  powers and
privileges of Managers under the Act and the laws of the State of Kentucky;

     (m) To do and  perform  all such  other  acts and  things  and to  execute,
acknowledge and deliver any and all other documents or instruments in connection
with any or all of the foregoing; and

     (n) Subject to the limitations  set forth in Section  4.1(j),  to engage or
retain  one or more  persons  to perform  acts or  provide  materials  as may be
required by the Company, at the Company's expense, and to compensate such person
or persons at a rate to be set by the Manager, provided that the compensation is
at the then prevailing rate for the type of services and materials provided,  or
both.  Any person,  whether a Member,  an  Affiliate  of a Member or  otherwise,
including  without  limitation  the  Manager,  may be employed or engaged by the
Company to render services and provide materials, including, but not limited to,
management  services,   professional  services,   accounting  services,  quality
assessment services, legal services, marketing services, maintenance services or
provide  materials;  and if such person is a Member or an Affiliate of a Member,
he shall be entitled  to, and shall be paid  compensation  for said  services or
materials, anything in this Agreement to the contrary notwithstanding,  provided
that  the  compensation  to be  received  for  such  services  or  materials  is
competitive  in  price  and  terms  with  then  prevailing  rate for the type of
services  and/or  materials  provided.  The Company,  pursuant to the terms of a
Management  Agreement,  will contract with the Management  Agent with respect to
the supervision and  coordination  of the management and  administration  of the
day-to-day  operations of the Mobile  Lithotripsy System for a monthly fee equal
to 7.5% of Company  Cash Flow per month.  All costs  incurred by the  Management
Agent in performing its duties as management  agent shall be paid by the Company
directly.  The Company may also contract with qualified  physicians  desiring to
use the Mobile Lithotripsy System for treatment of patients.  Owning an interest
in the Company shall not be a condition to using the Mobile Lithotripsy  System.
The  Manager  and its  Affiliates  may engage in or possess an interest in other
business  ventures of any nature and description  independently  or with others,
including,  but not limited to, the operation of a mobile lithotripsy  treatment
unit  similar to the Mobile  Lithotripsy  System,  whether or not such  business
ventures are in direct or indirect competition with the Company, and neither the
Company  nor the  Physician  Members  shall  have any  right by  virtue  of this
Agreement  in and to said  independent  ventures  or to the  income  or  profits
derived therefrom.

     (o) To cause the  Company to engage in a Dilution  Offering  as provided in
Section 6.4.


                                      -14-
<PAGE>

     3.3 Specific  Authority of Manager.  Notwithstanding  Sections 3.1 and 3.2,
the Manager  shall have and may exercise on behalf of the Company the  following
powers:

     (a) To  prepare  or cause to be  prepared  reports,  statements  and  other
relevant information for distribution to Members; and

     (b) To open  accounts  and  deposit and  maintain  funds in the name of the
Company in banks or savings and loan associations.

     3.4 Authority as to Third  Persons.  Notwithstanding  Sections 3.2, 3.3 and
4.5 the signed  statement of the Manager  reciting  that he has the authority or
the necessary approvals of either the Executive Committee or the Members for any
action, as to any third Person, shall be conclusive evidence of the authority of
the  Manager  to take  that  action  and of  compliance  with  Section  3.2,  if
applicable.  Each Physician Member will promptly execute instruments  determined
by the Manager to be  appropriate  to evidence  the  authority of the Manager to
consummate any transaction permitted by this Agreement.

     3.5  Compensation   and  Expenses.   The  Manager  shall  not  receive  any
compensation from the Company for serving as Manager,  but all expenses incurred
by the  Manager  in  connection  with its  service  as  Manager  will be paid or
promptly  reimbursed  by the Company.  Nothing  contained in this Section 3.5 is
intended  to affect the  Percentage  Interest  of the Manager as a Member or the
amounts  that  may be  payable  to  the  Manager  by  reason  of its  respective
Percentage Interests.

     3.6  Indemnification  and Exculpation of the Manager.  The Manager,  as the
managing member of the Company, is accountable to the Company as a fiduciary and
consequently must exercise good faith and integrity in handling Company affairs.
The Manager and its  Affiliates  shall have no  liability  to the Company  which
arises out of any action or  inaction of the  Manager or its  Affiliates  if the
Manager or its Affiliates, in good faith, determined that such course of conduct
was in the best  interest  of the  Company  and such  course of conduct  did not
constitute  gross  negligence  or  willful  misconduct  of  the  Manager  or its
Affiliates.  The Company shall  indemnify the Manager,  each officer,  director,
employee,  agent or  Affiliate  of the  Manager or of any of their  officers  or
directors  (the  "Indemnified  Persons")  against any direct and actual  losses,
liabilities,   damages  or  expenses   (including  court  costs  and  reasonable
attorney's fees but excluding consequential damages) that any of the Indemnified
Persons incur in connection  with the Company,  but only to the extent that such
Indemnified  Person acted in good faith,  without gross  negligence,  or willful
misconduct,  and in a manner reasonably  believed to be in the best interests of
the Company.  Any attorney's fees or other  litigation  expenses  incurred by an
Indemnified  Person shall be advanced to such Indemnified  Person within 30 days
of receipt of a written demand  therefor,  together with an undertaking by or on
behalf of the  Indemnified  Person to repay to the Company  such amount if it is
ultimately  determined  that  the  Indemnified  Person  is  not  entitled  to be
indemnified by the Company pursuant to this Section 3.6.

     3.7 Liability for Return of Capital Contribution.  The Manager shall not be
liable for the return of the Capital Contributions of the Physician Members, and
upon  dissolution,  the Physician Members shall look solely to the assets of the
Company.


                                      -15-
<PAGE>


                        ARTICLE IV - EXECUTIVE COMMITTEE

     4.1 General  Powers.  The  business  and  affairs of the  Company  shall be
managed under the direction of the Manager; provided,  however, that without the
prior  written  consent of the  Executive  Committee,  the Manager shall have no
authority to do any of the following:

     (a) The  refinancing  of any Company  indebtedness,  or the  incurrence  of
additional Company indebtedness, in excess of $100,000;

     (b) A capital  expenditure  by the  Company,  other than out of the initial
Offering  proceeds,  in excess of $100,000,  including  the  acquisition  by the
Company of one or more additional Mobile Lithotripsy Systems or other urological
equipment;

     (c) The institution and carrying out any plan of merger,  consolidation  or
sale of all the  Membership  Interests  or the  Company  as set forth in Section
10.6;

     (d) The voluntary dissolution of the Company;

     (e) The disposition of all or substantially all of the Company's assets;

     (f) Doing any act in contravention of this Agreement;

     (g)  Possessing  or in any manner  dealing with the  Company's  Property or
assigning  the rights of the Company in the  Company's  Property  for other than
Company purposes;

     (h) Amending this Agreement;

     (i)  Expanding  the  Service  Area  beyond the  boundaries  of the State of
Kentucky;

     (j) With the  exception of the  Management  Agreement  (including  renewals
thereof) and the Sales Agency Agreement, authorize or make payment of any salary
or other  compensation  to,  or  enter  into any  contract,  agreement  or other
arrangement with, any Affiliate of the Manager; and

     (k)  Confessing  a judgment  against  the  Company in  connection  with any
threatened or pending legal action.
 
     4.2  Number,  Term and  Qualification.  The  Executive  Committee  shall be
appointed  by the  Manager  and shall  consist of four  Physician  Members and a
representative  of the  Manager  who need not be a  Member.  Each  member of the
Executive  Committee  shall  continue  to hold  office  until his or her  death,
resignation or removal and replacement by the Manager.

     4.3 Removal and Replacement. The Manager may remove and replace one or more
of the Executive Committee members at any time, with or without cause, provided,
however, that written

                                      -16-
<PAGE>

notice of such removal and replacement must be given to the Executive  Committee
and all Physician  Members at least five (5) days before the  effective  date of
removal and replacement.

     4.4 Compensation and Expenses. The members of the Executive Committee shall
not receive  compensation for their services as such, but all expenses  incurred
by the members of the Executive  Committee in  connection  with their service as
such will be paid or  promptly  reimbursed  by the  Company.  Any  member of the
Executive  Committee  may serve the  Company in any other  capacity  and receive
compensation therefore.

     4.5  Action  by the  Executive  Committee.  Any  action  to be taken by the
Executive  Committee  under  this  Agreement  may be taken at a  meeting  of the
Executive Committee held on such terms, and after such notice as the Manager may
establish;  provided,  however,  that  notice  of a  meeting  of  the  Executive
Committee must be given to all Members  entitled to vote at the meeting at least
five  (5)  days  before  the  date of the  meeting.  All of the  members  of the
Executive  Committee in office shall  constitute a quorum for the transaction of
business at a meeting of the Executive Committee,  and the affirmative vote of a
majority of such members shall  constitute  the act of the Executive  Committee,
unless a different  affirmative  vote is  otherwise  specifically  provided  for
herein.  An  Executive  Committee  member  who is  present  at a meeting  of the
Executive  Committee at which action on any Company matter is taken is deemed to
have  assented to the action taken unless he or she objects at the  beginning of
the  meeting (or  promptly  upon  arrival) to the  holding,  or  transacting  of
business at, the meeting,  or unless his or her dissent or abstention is entered
in the minutes of the meeting or unless he or she shall file  written  notice of
his or her dissent or abstention  to such action with the  presiding  officer of
the  meeting  before  its  adjournment  or with the  Manager  immediately  after
adjournment of the meeting.  The right of dissent or abstention  shall not apply
to a member of the Executive Committee who voted in favor of such action.

     4.6 Action Without Meeting.  Unless  otherwise  provided in this Agreement,
any action  required  or  permitted  to be taken at a meeting  of the  Executive
Committee  may be taken  without a meeting if the action is taken by all members
of the Executive Committee. Such action must be evidenced by one or more written
consents  signed by each  member  before or after such  action,  describing  the
action taken, and included in the records of the Company. Action taken without a
meeting  is  effective  when the last  director  signs the  consent,  unless the
consent specifies a different effective date.

     4.7 Meeting by  Communications  Device.  Unless otherwise  provided in this
Agreement,  the Executive Committee may permit any or all members to participate
in a  meeting  by, or  conduct  the  meeting  through  the use of,  any means of
communication by which all members  participating may  simultaneously  hear each
other during the meeting.  A member  participating in a meeting by this means is
deemed to be present in person at the meeting.

     4.8 Indemnification of Executive Committee Members. The Executive Committee
and its members  shall have no liability to the Company  which arises out of any
action or inaction of the Executive Committee if the Executive Committee and its
members in good faith  determined  that such  course of conduct  was in the best
interest of the Company  and such  course of conduct did not  constituted  gross
negligence or willful misconduct of the Executive Committee and its members. The
Company

                                      -17-
<PAGE>

shall  indemnify the members of the Executive  Committee  against any direct and
actual  losses,  liabilities,  damages  or  expenses  (including  court cost and
reasonable attorney's fees but excluding  consequential damages) that any of the
members  incur in  connection  with the Company but only to the extent that such
member acted in good faith, without gross negligence, and in a manner reasonably
believed to be in the best  interests of the  Company.  Any  attorney's  fees or
other litigation expenses incurred by a member of the Executive Committee member
shall be advanced to such member within thirty (30) days of receipt of a written
demand  therefor,  together with an undertaking by or on behalf of the member to
repay to the Company such amount if it is ultimately determined that such member
is not entitled to be indemnified by the Company pursuant to this Section 4.8.

     4.9 Liability for Return of Capital  Contribution.  The Executive Committee
and its members shall not be liable for the return of the Capital  Contributions
of the  Members,  and upon  dissolution,  the  Members  shall look solely to the
assets of the Company.


                  ARTICLE V - RIGHTS AND OBLIGATIONS OF MEMBERS

     5.1 Names and Addresses of Members.  The names,  addresses  and  Percentage
Interests of the Members are as reflected in Schedule I attached hereto and made
a part hereof, which Schedule shall be amended by the Company upon the effective
date of any Transfer or subsequent issuance of any Membership Interest.
 
     5.2 No  Management  by Members.  The  Members in their  capacity as Members
shall not take part in the  management or control of the business,  nor transact
any business  for the Company,  nor shall they have power to sign for or to bind
the Company. The Company may, however,  contract with one or more Members to act
as the local Medical Director for the Mobile  Lithotripsy  System. No Member may
withdraw from the Company except as expressly permitted herein.

     5.3  Election  of Manager.  PKST shall serve as the initial  Manager of the
Company.  The Members  shall have the power to remove and replace the Manager as
set forth in Section 3.1(d).

     5.4 Action by Members.  Any action to be taken by the Members under the Act
or this  Agreement  may be taken (i) at a meeting  of the  Members  held on such
terms,  and after such notice as the Manager may establish;  provided,  however,
that  notice of a meeting of Members  must be given to all  Members  entitled to
vote at the  meeting at least five (5) days before the date of the  meeting,  or
(ii) by written  action of a Majority  in  Interest  of the  Members;  provided,
however,  that any action  requiring the consent of all Members under the Act or
this Agreement taken by written action must be signed by all Members.  No notice
need be given of action proposed to be taken by written  action,  or an approval
given by written action,  unless specifically  required by this Agreement or the
Act. Such written actions must be kept with the records of the Company.

     5.5  Operation of Mobile  System.  The Members shall not operate or utilize
the Mobile  Lithotripsy System or other Company equipment except pursuant to (i)
an  agreement  with the  Company;  or (ii) any  other  arrangement  specifically
approved by the Manager.


                                      -18-
<PAGE>

     5.6 Outside Activities. The Physician Members agree that they owe fiduciary
duties to the Company and, as a consequence,  each Physician  Member agrees that
he or she shall not engage in "Outside  Activities"  (as  defined  below) in the
"Market Area" (as defined below) while he or she is a Member of the Company. The
phrase  "Outside  Activities"  means directly or indirectly  owning,  leasing or
subleasing  Mobile  Lithotripsy  System (or any similar  equipment  or competing
devices used for lithotripsy of renal stones) or any other therapeutic equipment
acquired by the Company.  Prohibited indirect ownership shall include the direct
or indirect  ownership  of any  interest in a business  venture  (through  stock
ownership,  partnership  interest  ownership,  ownership  by or  through a close
family member, or as otherwise determined in good faith by the Manger) involving
the ownership, purchase, lease, sublease, promotion,  management or operation of
a Mobile  Lithotripsy System (or similar equipment or competing devices used for
lithotripsy of renal stones), or other competing device or equipment, unless the
Manager   determines  that  such  activity  by  the  Physician  Members  is  not
detrimental to the best interests of the Company.

     Upon the  termination  or transfer of a  Physician  Member  interest in the
Company for any reason,  including a transfer  pursuant to Section  11.3 hereof,
the  withdrawing  Physician  Member  shall  not,  for a period  of two (2) years
following the date of his or her withdrawal, engage in any Outside Activities in
any  "Market  Area" in which the Company is  transacting  business or within the
prior twelve months has transacted business (the "Restricted  Facilities").  For
the purposes of this Section 5.6, the term "Market Area" shall mean (i) the area
within a fifty  mile  radius  of any  Restricted  Facility,  but if such area is
determined by a court of competent  jurisdiction to be too broad,  then it shall
mean (ii) the area within a twenty-five mile radius of any Restricted  Facility,
but if such area is  determined by a court of competent  jurisdiction  to be too
broad  then it shall  mean  (iii)  the area  within  a ten  mile  radius  of any
Restricted Facility.

     In the event a Physician  Member wishes and intends to engage in an Outside
Activity in a Market Area, he or she must provide  written notice of such intent
to the Manager  prior to engaging in the Outside  Activity.  The written  notice
shall be deemed an election by the Physician Member to withdraw from the Company
(the "Notice of Withdrawal"),  and shall give the Manager the purchase rights as
provided in Section  11.3  hereof.  After the Notice of  Withdrawal,  the former
Physician Member may engage in an Outside Activity in the Market Area only after
waiting the period of two years specified in this  Section 5.6.  In the event of
breach of the waiting period, the Company shall be entitled to any remedy at law
or  equity  with  respect  to  such  breach,  including  without  limitation  an
injunction or suit for damages.

     If a  Physician  Member  during  his or her  participating  in the  Company
engages in an Outside  Activity in a Market Area  without  first  notifying  the
Manager in violation of this Section 5.6, the  Physician  Member shall be deemed
to have given a Notice of Withdrawal on the date the Manager first becomes aware
of the Physician  Member's Outside Activity in the Market Area. Upon receiving a
Physician Member's Notice of Withdrawal or equivalent  thereof,  the Company may
invoke the purchase rights provided in Section 11.3 and shall be entitled to any
other remedy at law or equity  including  without  limitation  and injunction or
suit for damages.

     5.7  Disclosure  of  Confidential   Information.   Each  Physician   Member
acknowledges and agrees that his or her  participation in the Company under this
Agreement necessarily involves his or her

                                      -19-
<PAGE>

understanding  of and access to certain  trade  secrets  and other  confidential
information  pertaining  to the  business  of  the  Company.  Accordingly,  each
Physician Member agrees that at all times during his or her participation in the
Company as a Member and thereafter,  he or she will not, directly or indirectly,
without the express written authority of the Company,  unless required by law or
directed by a applicable legal authority having  jurisdiction over the Physician
Member,  disclose  or use for the benefit of any  person,  corporation  or other
entity  (other  than  the  Company),  or  himself  or  herself,  (i) any  trade,
technical,  operational,  management or other  secrets,  any patient or customer
lists  or  other   confidential  or  secret  data,  or  any  other  proprietary,
confidential  or secret  information  of the  Company  or (ii) any  confidential
information concerning any of the financial  arrangements,  financial positions,
hospital  or  physician  contracts,  third  party  payor  arrangements,  quality
assurance  and  outcome  analysis  programs,  competitive  status,  customer  or
supplier matters, internal organizational matters, technical abilities, or other
business  affairs  of  or  relating  to  the  Company.   The  Physician  Members
acknowledge that all of the foregoing constitutes proprietary information, which
is the exclusive property of the Company. In the event of breach of this Section
5.7 as determined by the Manager, the Company shall be entitled to any remedy at
law or equity with  respect to such breach,  including  without  limitation,  an
injunction or suit for damages.

     5.8  Limited   Liability.   No  Members  shall  be  required  to  make  any
contribution  to the capital of the  Company  except as set forth in Article VI,
nor shall any Member in his or her  capacity as such be bound by, or  personally
liable for, any expense,  liability or obligation  of the Company  except to the
extent of his or her (i) interest in the  Company,  (ii)  Guaranties  of Company
obligations,  and (iii)  obligation to return  Distributions  made to him or her
under certain circumstances as required by the Act.


                       ARTICLE VI - CAPITAL CONTRIBUTIONS,
                        GUARANTIES AND DILUTION OFFERINGS

     6.1  Manager  Contribution.  On or before the date of this  Agreement,  the
Manager will contribute to the capital of the Company cash in an amount equal to
20% (up to $50,000) of the total cash  contributed to the Company by the Members
in the Offering made pursuant to the Memorandum.

     6.2 Physician Members Contribution.  Each Physician Member hereby agrees to
contribute and shall contribute to the capital of the Company on the date of his
or her  admission  to the Company the cash amount set forth  opposite his or her
name on Schedule I attached hereto.

     6.3 No Interest.  Except as otherwise provided herein, no interest shall be
paid on any contribution to the capital of the Company.

     6.4 Dilution  Offerings.  As provided in Section 4.1(a),  Manager may, from
time to time, cause the Company to issue,  offer and sell additional  Membership
Interests in the Company (a "Dilution Offering") to local urologists who are not
already  Members  ("Qualified  Investors").  The primary purpose of any Dilution
Offering would be (i) to raise  additional  capital for any  legitimate  Company
purpose as set forth in Section  1.5 and (ii) to assure the  highest  quality of
patient  care by  admitting  Qualified  Investors  to the  Company  who would be
dedicated and motivated as owners to follow the  Company's  treatment  protocol,
and comply with its quality assurance and outcome analysis programs.

                                      -20-
<PAGE>

Any Membership  Interests offered by the Company in a Dilution Offering shall be
sold in the manner and according to the terms  prescribed in the sole discretion
of the Manager;  provided,  however,  that any additional  Membership  Interests
offered  in a  Dilution  Offering  will be sold for a price  no  lower  than the
highest price for which proportionate  Membership  Interests in the Company have
been previously sold by the Manager. Any sale of additional Membership Interests
will result in the proportionate dilution of the Company Percentage Interests of
the existing Members. Any investor acquiring a Membership Interest in a Dilution
Offering  shall agree to be bound by the terms of this  Agreement,  and shall be
automatically  admitted  as a Member of the  Company  notwithstanding  any other
provisions  in this  Agreement to the contrary.  Any  adjustment in the Members'
Percentage  Interests  resulting from a Dilution  Offering shall be set forth on
Schedule I attached hereto.

6.5  Conditions  to the Capital  Contributions  of the  Physician  Members.  The
obligation of the Physician Members to make cash Capital Contributions hereunder
are subject to the condition that the  representations,  warranties,  agreements
and covenants of the Manager set forth in Article VII of this  Agreement are and
shall be true and correct or have been and will have been  complied  with in all
material  respects on the date such  Capital  Contributions  are  required to be
made, except to the extent that any such  representation  or warranty  expressly
pertains to an earlier date.

6.6 Capital Accounts. A Capital Account shall be established for each Member and
shall be credited with each Member's Capital Contributions  pursuant to Sections
6.1 and 6.2. All  contributions  of property to the Company by a Member shall be
valued and credited to the Member's  Capital  Account at such  property's  gross
fair market value on the date of contribution as determined by the  contributing
Member and the  Manager.  All  distributions  of  Property  to the Member by the
Company shall be valued and debited against the Member's Capital Account at such
Property's  gross fair market value on the date of distribution as determined by
the Manager.  Each Member's Capital Account shall at all times be determined and
maintained  pursuant  to  the  principles  of  this  Section  6.6  and  Treasury
Regulations  Section  1.704-1(b)(2)(iv).  A  Member  shall  not be  entitled  to
withdraw any part of his or her Capital Account except as otherwise specifically
provided herein.  Each Member's Capital Account shall be increased in accordance
with such Regulations by:

(i) The amount of Profits allocated to the Member pursuant to this Agreement;

(ii) The amount of all Gains From Capital  Transactions  allocated to the Member
pursuant to this Agreement; and

(iii) The amount of any Company  liabilities  assumed by the Member or which are
secured by any Company property distributed to such Member.

Each  Member's  Capital  Account  shall be  decreased  in  accordance  with such
Regulations by:

     (i)  The  amount  of  Losses  allocated  to the  Member  pursuant  to  this
Agreement;

     (ii) The amount of Company Cash Flow  distributed to the Member pursuant to
this Agreement;


                                      -21-
<PAGE>

     (iii) The amount of Company Sales Proceeds and Company Refinancing Proceeds
distributed to the Member pursuant to this Agreement; and
 
     (iv) The amount of any  liabilities of the Member assumed by the Company or
which are secured by any property contributed by such Member to the Company.

     In addition,  each Member's  Capital Account shall be subject to such other
adjustments  as may be  required  in order to comply  with the  capital  account
maintenance requirements of Section 704(b) of the Code.

     In the event that the Manager shall  determine that it is prudent to modify
the manner in which the  Capital  Accounts,  or any  debits or  credits  thereto
(including,  without limitation,  debits or credits relating to liabilities that
are secured by contributed  or  distributed  property or that are assumed by the
Company or the  Members),  are  computed in order to comply  with such  Treasury
Regulations,  the Manager may make such  modification,  provided  that it is not
likely to have a material effect on the amounts distributable to any Member upon
dissolution of the Company. The Manager also shall (i) make any adjustments that
are necessary or appropriate to maintain  equality  between the Capital Accounts
of the  Members and the amount of Company  capital  reflected  on the  Company's
balance  sheet,  as computed for book  purposes,  in  accordance  with  Treasury
Regulations  Section   1.704-1(b)(2)(iv)(g),   and  (ii)  make  any  appropriate
modifications  in the event  unanticipated  events  might  otherwise  cause this
Agreement not to comply with Treasury Regulations Section 1.704-1(b).


                  ARTICLE VII - REPRESENTATIONS, WARRANTIES AND
                            COVENANTS OF THE MANAGER

     7.1 Manager's Representations and Warranties. The Manager hereby represents
and warrants to the Physician Members that:

     (a) The Company is a limited  liability  company formed in accordance  with
and validly existing under the Act and the other applicable laws of the State of
Kentucky;

     (b) The  interest in the Company of the  Physician  Members  will have been
duly  authorized or created and validly  issued and the Physician  Members shall
have no personal  liability to  contribute  money to the Company  other than the
amounts  agreed to be  contributed  by them in the  manner  and on the terms set
forth in this Agreement, subject, however, to such limitations as may be imposed
under the Act;

     (c) No material  breach or default  adverse to the Company exists under the
terms of any other material agreement affecting the Company; and

     (d) The Manager is a New Jersey  corporation  formed and existing under the
laws of the State of New Jersey.


                                      -22-
<PAGE>

     7.2  Manager's  Covenants.  The Manager  hereby  covenants to the Physician
Members that:

     (a) It will at all times act in a  fiduciary  manner  with  respect  to the
Company and the Physician Members.

     (b) Except as provided in Articles III and XI, it will serve as the Manager
of the Company until the Company is terminated without reconstitution; and

     (c) It will cause the Company to carry adequate public liability,  property
damage and other  insurance  as is customary in the business to be engaged in by
the Company.


                ARTICLE VIII - ALLOCATIONS, ELECTIONS AND REPORTS

     8.1 Profits and Losses.

     (a) Except as otherwise provided herein,  Profits and Losses of the Company
and all items of tax  credit and tax  preference  shall be  allocated  among the
Members in accordance with their respective Percentage  Interests.  In the event
the Percentage Interests vary during any Fiscal Year, Profits and Losses and all
items of tax credit and tax  preference  for such Fiscal Year shall be allocated
among the Members as provided in Section 8.5 below.

     (b) Losses  allocated  pursuant  to this  Section  8.1 shall not exceed the
maximum amount of Losses that can be so allocated  without causing any Member to
have an Adjusted  Capital  Account Deficit at the end of any Fiscal Year. In the
event  some but not all of the  Members  would  have  Adjusted  Capital  Account
Deficits  as  a  consequence  of  an  allocation  of  Losses  pursuant  to  this
Section 8.1,  the limitation set forth in this Section 8.1 shall be applied on a
Member by Member  basis so as to allocate  the maximum  possible  Losses to each
Member under Section 1.704-1(b)(2)(ii)(d) of the Treasury Regulations.

     8.2  Sales  Commission.  The Sales  Commission  shall be  allocated  to the
Physician  Members  holding Units to the extent such Physician  Members paid the
Sales Commission,  and in proportion to their respective  capital  contributions
represented by such Units (i.e.,  $250 in Sales  Commission per each such Unit).
The purpose of this  Section 8.2 is to allocate  the Sales  Commission  to those
Members who actually bore the burden of paying the Sales Commission.

     8.3 Nonrecourse Deductions. Nonrecourse Deductions shall be allocated among
the Members in accordance with their respective Percentage Interests.


                                      -23-
<PAGE>

     8.4 Member Nonrecourse Deductions.  Any Member Nonrecourse Deductions shall
be specially  allocated  to the Member who bears the economic  risk of loss with
respect  to the  Member  Nonrecourse  Debt  to  which  such  Member  Nonrecourse
Deductions are  attributable  in accordance  with Treasury  Regulations  Section
1.704-2(i).

     8.5  Allocations  Between  Transferor and  Transferee.  In the event of the
transfer of all or any part of a Member's  Membership  Interest  (in  accordance
with the  provisions  of this  Agreement) at any time other than at the end of a
Fiscal Year, the change in any Member's  Percentage Interest or the admission of
a new Member (in accordance with the terms of this Agreement),  the transferring
Member or new Member's share of the Company's income, gain, loss, deductions and
credits,  as computed both for  accounting  purposes and for federal  income tax
purposes,  shall be allocated  between the transferor  Member and the transferee
Member, or the new Member and the other Members, as the case may be, in the same
ratio as the number of days in such Fiscal Year before and after the date of the
transfer or admission; provided, however, that if there has been a sale or other
disposition  of the assets of the  Company  (or any part  thereof)  during  such
Fiscal Year,  then upon the mutual  agreement of all the Members  (excluding the
new Member and the  transferring  Member),  the Company  shall treat the periods
before and after the date of the transfer or admission as separate  Fiscal Years
and allocate the Company's net income,  gain,  net loss,  deductions and credits
for each of such deemed  separate  Fiscal Years of the Company.  Notwithstanding
the foregoing,  the Company's "allocable cash basis items," as that term is used
in Section  706(d)(2)(B) of the Code,  shall be allocated as required by Section
706(d)(2) of the Code and the Treasury Regulations thereunder.

     8.6 Gains from Capital Transactions. Gains from Capital Transactions during
any Fiscal Year shall be allocated as follows:

     (a) First, to those Members whose Capital Accounts immediately prior to the
Capital  Transaction  were  negative,  in an amount  sufficient  to increase the
Capital  Accounts to zero, but in the event sufficient gain is not recognized to
do so,  then  among  them  pro rata in  proportion  to  their  negative  Capital
Accounts;

     (b) Second, to the Members in an amount equal to the difference between the
Company Sales  Proceeds to be  distributed to each of the Members as provided in
Section 8.3 and the Capital  Accounts of each respective  Member as adjusted (if
necessary)  by  paragraph  (a) above,  but in the event  sufficient  gain is not
recognized to do so, then among the Members in an amount which, when credited to
the Capital  Accounts of the Members,  results in the Members'  Capital Accounts
bearing  the same  ratio to one  another  as the  ratio of the  distribution  of
Company Sales  Proceeds to each of the Members,  as provided in Section 9.3; and
thereafter

     (c) Any remaining  gain shall be allocated  among the Members in accordance
with  their  respective  Percentage  Interests  as of the  date  of the  Capital
Transaction giving rise to the gain.

     8.7  Contributed  Property.  In accordance with Code Section 704(c) and the
Treasury Regulations  thereunder,  income, gain, loss and deduction with respect
to any property  contributed to the capital of the Company shall, solely for tax
purposes, be allocated among the Members so as to take

                                      -24-
<PAGE>

account of any  variation  between the  adjusted  basis of such  property to the
Company for federal income tax purposes and its initial Gross Asset Value at the
time of contribution.

     Any elections or other decisions relating to such allocations shall be made
by the Members in any manner that reasonably  reflects the purpose and intention
of this  Agreement.  Allocations  pursuant  to this  Section  8.7 are solely for
purposes of federal,  state and local taxes and shall not affect,  or in any way
be taken into account in  computing,  any Member's  Capital  Account or share of
Profits,  Losses, other items or Distributions pursuant to any provision of this
Agreement.

     8.8 Minimum Gain Chargeback.  If there is a net decrease in Company Minimum
Gain during any Fiscal Year,  each Member shall be specially  allocated items of
Company  income and gain for such Fiscal  Year (and,  if  necessary,  subsequent
years) in an amount equal to such Member's  share of the net decrease in Company
Minimum  Gain,   determined  in  accordance  with  Treasury  Regulation  Section
1.704-2(g).  Allocations  pursuant  to the  previous  sentence  shall be made in
proportion  to the  respective  amounts  required to be allocated to each Member
pursuant thereto. The items to be so allocated shall be determined in accordance
with Treasury Regulations  Sections 1.704-2(f) and 1.704- 2(j)(2).  This Section
8.8 is  intended  to comply  with the minimum  gain  chargeback  requirement  in
Treasury Regulation 1.704-2(f) and shall be interpreted consistently therewith.

     8.9 Member  Minimum Gain  Chargeback.  If there is a net decrease in Member
Minimum Gain  attributable to a Member  Nonrecourse Debt, as defined in Treasury
Regulation Section 1.704- 2(i)(4), during any Fiscal Year, each Member who has a
share of the Member Minimum Gain  attributable to such Member  Nonrecourse Debt,
determined in accordance with Treasury Regulation Section  1.704-2(i)(5),  shall
be  specially  allocated  items of Company  income and gain for such Fiscal Year
(and, if necessary, subsequent Fiscal Years) in an amount equal to such Member's
share of the net  decrease in Member  Minimum Gain  attributable  to such Member
Nonrecourse  Debt,  determined in accordance  with Treasury  Regulation  Section
1.704-2(i)(4)  and (5).  Allocations  pursuant to the previous sentence shall be
made in proportion to the  respective  amounts  required to be allocated to each
Member  pursuant  thereto.  The items to be so allocated  shall be determined in
accordance with Treasury Regulations Section 1.704-2(i)(4).  This Section 8.8 is
intended  to comply  with the Member  Minimum  Gain  chargeback  requirement  in
Treasury Regulation  Section 1.704(i)(4)  and shall be interpreted  consistently
therewith.

     8.10  Qualified  Income  Offset.  If any Member  unexpectedly  receives  an
adjustment,  allocation  or  distribution  as described in Treasury  Regulations
Section  1.704-1(b)(2)(ii)(d)(4) through (6) which causes or increases a deficit
Capital  Account  balance in such  Member's  Capital  Account (as  determined in
accordance  with such  Regulation),  items of  Company  income and gain shall be
specially  allocated to each such Member in an amount and manner  sufficient  to
eliminate,  to the extent  required by the  Regulations,  the  Adjusted  Capital
Account  Deficit  of such  Member  as  quickly  as  possible,  provided  that an
allocation pursuant to this Section 8.10 shall be made if and only to the extent
that such Member would have an Adjusted  Capital Account Deficit after all other
allocations  provided for in this Article VII have been  tentatively  made as if
this Section 8.10 were not in this Agreement. This provision is intended to be a
"qualified  income  offset," as defined in Treasury  Regulation  Section  1.704-
1(b)(2)(ii)(d),  such  Regulation  being  specifically  incorporated  herein  by
reference.


                                      -25-
<PAGE>

     8.11 Gross Income Allocation. In the event any Member has a deficit Capital
Account at the end of any  Fiscal  Year which is in excess of the sum of (i) the
amount such Member is obligated  to restore,  and (ii) the amount such Member is
deemed to be  obligated  to restore  pursuant to the  penultimate  sentences  of
Treasury Regulations Sections 1.704-2(g)(1) and 1.704-2(i)(5),  each such Member
shall be specially  allocated  items of Company income and gain in the amount of
such excess as quickly as possible, provided that an allocation pursuant to this
Section 8.11 shall be made if and only to the extent that such Member would have
a deficit  Capital  Account  in  excess of such sum after all other  allocations
provided for in this Article VIII have been  tentatively made as if this Section
8.11 and Section 8.10 hereof were not in this Agreement.

     8.12 Section 754  Adjustment.  To the extent an  adjustment to the adjusted
tax basis of any Company asset  pursuant to Code Section  734(b) or Code Section
743(b)   is    required,    pursuant    to    Treasury    Regulations    Section
1.704-1(b)(2)(iv)(m)(2)     or    Treasury     Regulations     Section    1.704-
1(b)(2)(iv)(m)(4),  to be taken into account in determining  Capital Accounts as
the result of a Distribution to a Member in complete liquidation of his interest
in the Company,  the amount of such adjustment to the Capital  Accounts shall be
treated as an item of gain (if the adjustment  increases the basis of the asset)
or loss (if the adjustment  decreases such basis) and such gain or loss shall be
specially  allocated to the Members in  accordance  with their  interests in the
Company in the event that Treasury  Regulations Section  1.704-1(b)(2)(iv)(m)(2)
applies,  or to the Members to whom such distribution was made in the event that
Treasury Regulations Section 1.704-1(b)(2)(iv)(m)(4) applies.

     8.13 Curative  Allocations.  The allocations set forth in Sections  8.1(b),
8.2, 8.3, 8.7, 8.8, 8.9, 8.10, 8.11 hereof (the  "Regulatory  Allocations")  are
intended to comply with certain requirements of the Treasury Regulations.  It is
the  intent  of  the  Members  that,  to the  extent  possible,  all  Regulatory
Allocations  shall be offset either with other  Regulatory  Allocations  or with
special  allocations of other items of Company  income,  gain, loss or deduction
pursuant to this Section 8.13. Therefore, notwithstanding any other provision of
this Article VIII (other than the  Regulatory  Allocations),  the Managers shall
make such  offsetting  special  allocations  of Company  income,  gain,  loss or
deduction in whatever  manner they  determine  appropriate  so that,  after such
offsetting  allocations are made,  each Member's  Capital Account balance is, to
the extent possible, equal to the Capital Account balance such Member would have
had if the Regulatory Allocations were not part of the Agreement and all Company
items were allocated  pursuant to Section 8.1(a). In exercising their discretion
under this Section 8.13, the Managers shall take into account future  Regulatory
Allocations  under Sections 8.7 and 8.8 that,  although not yet made, are likely
to offset other  Regulatory  Allocations  previously made under Sections 8.2 and
8.3.

     8.14 Compliance  with Treasury  Regulations.  The above  provisions of this
Article VIII notwithstanding, it is specifically understood that the Manager may
without the  consent of any Member  make such  elections,  tax  allocations  and
adjustments,  including  amendments  to  this  Agreement,  as the  Manager  deem
necessary  or  appropriate  to  maintain to the  greatest  extent  possible  the
validity of the tax allocations set forth in this Agreement,  particularly  with
regard to Treasury Regulations under Code Section 704(b).

     8.15 Tax Withholding.  The Company shall be authorized to pay, on behalf of
any Member, any amounts to any federal, state or local taxing authority,  as may
be necessary for the Company to

                                      -26-
<PAGE>

comply  with tax  withholding  provisions  of the Code or  other  income  tax or
revenue  laws of any taxing  authority.  To the extent the Company pays any such
amounts that it may be required to pay on behalf of a Member, such amounts shall
be treated as a cash  Distribution  to such  Member and shall  reduce the amount
otherwise distributable to such Member.


                           ARTICLE IX - DISTRIBUTIONS

     9.1  Company  Cash Flow.  Company  Cash Flow for each Fiscal  Year,  to the
extent available,  shall be distributed to the Members within 60 days of the end
of each Fiscal Year, or earlier in the discretion of the Manager,  in accordance
with  the  Members   respective   Percentage   Interests  at  the  time  of  the
distribution.

     9.2 Company  Refinancing  Proceeds.  Company Refinancing  Proceeds,  to the
extent  available,  shall be  distributed  to the Members  within 60 days of the
Capital  Transaction giving rise to such proceeds,  or earlier in the discretion
of the Managers,  in accordance with the Members respective Percentage Interests
at the time of the distribution.

     9.3 Company Sales Proceeds.  Company Sale Proceeds, to the extent available
shall be distributed  to the Members  within 60 days of the Capital  Transaction
giving rise to such proceeds,  or earlier,  in the discretion of the Manager, in
accordance with the Members respective  Percentage  Interests at the time of the
distribution.

     9.4 Distributions in Liquidation.  Upon liquidation of the Company, all the
Company's  Property  shall be liquidated or  distributed  as provided in Section
12.3 and Profits and Losses allocated accordingly. Proceeds from the liquidation
of the Company shall be distributed in accordance with the provisions of Section
12.3.

     9.5 Limitation Upon  Distributions.  No Distribution  shall be declared and
paid if payment of such  Distribution  would  cause the  Company to violate  any
limitation on distributions provided in the Act.


           ARTICLE X - TRANSFER OF INTERESTS AND ADMISSION OF MEMBERS

     10.1 Transferability of Membership Interests.

     (a) The term  "transfer"  when used in this  Agreement  with  respect  to a
Membership Interest includes a sale, assignment,  gift, pledge, exchange, or any
other disposition (but does not include the issuance of new Membership Interests
pursuant to a Dilution Offering);

     (b) Except as otherwise  provided herein, the Manager shall not at any time
transfer or assigning its interest or obligation as Manager;


                                      -27-
<PAGE>

     (c)  The  Membership   Interest  of  any  Physician  Member  shall  not  be
transferred,  in whole or in part,  except in accordance with the conditions and
limitations set forth in Section 10.2 or Article XI;

     (d) The transferee of a Membership Interest by assignment, operation of law
or otherwise,  shall have only the rights,  powers and privileges  enumerated in
Section 10.3 or otherwise provided by law and may not be admitted to the Company
as a Member except as provided in Section 10.4;

     (e)  Notwithstanding  any provision herein to the contrary,  this Agreement
shall in no way restrict the issuance or transfers of stock of the Manager; and

     (f) Notwithstanding  any provision herein to the contrary,  the issuance of
Membership  Interests  pursuant to a Dilution  Offering and the admission of new
Members  pursuant to a Dilution  Offering shall be governed by the provisions of
Section 6.4 of this Agreement.

     10.2 Restrictions on Transfers by Physician Members.

     (a) All or part of a Membership  Interest may be transferred by a Physician
Member only with the prior written  approval of the Manager,  which approval may
be granted or denied in its sole discretion.

     (b) The Manager  shall not approve any transfer of a  Membership  Interest,
except a pledge of any Membership Interest by the Manager to any bank, insurance
company or other  financial  institution  to secure payment of  indebtedness  (a
"Permitted  Pledge"),  or otherwise  unless the proposed  transferee  shall have
furnished the Manager with a sworn statement that:

     (i) The  proposed  transferee  proposes  to acquire  his or her  Membership
Interest  as a  principal,  for  investment  and not  with a view to  resale  or
distribution;

     (ii)  The   proposed   transferee   meets   such   requirements   regarding
sophistication, income and net worth as required by applicable state and federal
securities laws;

     (iii) The proposed transferee has met such net worth and income suitability
standards as have been established by the Manager;

     (iv) The proposed  transferee  recognizes  that  investment  in the Company
involves  certain risks and has taken full  cognizance of and understands all of
the risk factors related to the purchase of a Membership Interest; and


                                      -28-
<PAGE>

     (v) The proposed  transferee has met all other  requirements of the Manager
for the proposed transfer.

     (c)  Other  than  in the  case  of a  Permitted  Pledge,  a  transfer  of a
Membership Interest may be made only if, prior to the date thereof,  the Company
upon request receives an opinion of counsel,  satisfactory in form and substance
to the Manager, that neither the offering nor the proposed transfer will require
registration under federal or applicable state securities laws or regulations.

     10.3 Rights of  Transferee.  Unless  admitted to the Company as a Member in
accordance with Section 10.4, the transferee of a Membership  Interest or a part
thereof or any right, title or interest therein (including any transferee having
an interest in a Membership  Interest as a result of a Permitted  Pledge)  shall
not be  entitled  to any of the  rights,  powers,  or  privileges  of his or her
predecessor  in interest,  except that (s)he shall be entitled to receive and be
credited  or debited  with his or her  proportionate  share of Company  Profits,
Losses,  Gains from  Capital  Transactions,  Company  Cash Flow,  Company  Sales
Proceeds, Company Refinancing Proceeds and Distributions in liquidation.

     10.4 Admission of Members.  Except as otherwise provided in Section 6.4 and
Article XI, the  Manager,  or the  transferee  of all or part of the  Membership
Interest of a Member, may be admitted to the Company as a Member upon furnishing
to the Manager all of the following:

     (a) The written approval of a Majority in Interest of the Physician Members
(except the assignor Member),  or the assignor Members alone, which approval may
be granted or denied in the sole  discretion  of such  Members or Member (as the
case may be);

     (b) The written  approval of the Manager,  which approval may be granted or
denied in the sole discretion of the Manager;

     (c) Acceptance, in a form satisfactory to the Manager, of all the terms and
conditions of this Agreement and any other documents required in connection with
the operation of the Company pursuant to the terms of this Agreement;

     (d) If the transferee is a corporation, a certified copy of a resolution of
its Board of  Directors  authorizing  it to become a Member  under the terms and
conditions of this Agreement;

     (e) A properly executed power of attorney  substantially  identical to that
contained in Section 13.15;

     (f) Such other  documents  or  instruments  as may be  required in order to
effect his or her admission as a Member; and

     (g) Payment of such  reasonable  expenses as may be incurred in  connection
with his or her admission as a Member.

                                      -29-
<PAGE>

     10.5   Amendment   of  Articles  of   Organization   and   Certificate   of
Qualification.  The Manager shall take all steps  necessary and  appropriate  to
prepare and record any  amendments  to the Articles of  Organization,  as may be
necessary or appropriate  from time to time to comply with the  requirements  of
the Act,  and shall take all steps  necessary  and  appropriate  to prepare  and
record any and all documents  necessary to qualify the Company to do business in
jurisdictions  where the Company is doing  business,  any may for these purposes
exercise  the power of attorney  delivered  to the Company  pursuant to Sections
10.4 and 13.15.

     10.6 Fundamental Changes. As provided in Section 4.1(c), if the Manager and
the Executive Committee approve a plan providing for the merger or consolidation
of  the  Company  with  another  person  or  entity,  or  the  sale  of  all  or
substantially all of the Membership Interests,  including without limitation the
exchange of  Membership  Interests  for equity  interests  in another  person or
entity or for cash or other  consideration or combination  thereof,  then and in
such event,  the Members  shall be obligated to take or refrain from taking,  as
the case may be,  such  actions  as the plan  may  provide,  including,  without
limitations,  executing such instruments,  and providing such information as the
Manager shall  reasonably  request.  Any plan described in this Section 10.6 may
also effect an  amendment  to the  Operating  Agreement or the adoption of a new
operating  agreement in  connection  with the merger of the Company with another
person or entity as  provided in Section  275.360 of the Act.  The plan may also
provide  that the Manager and its  Affiliates  shall  receive  fees for services
rendered in connection with the operation of the Company or any successor entity
following  the  consummation  of the  transactions  described  in the plan,  and
neither  the  Company  nor the  Members  shall  have any right by virtue of this
Agreement in the income derived therefrom. Any securities or other consideration
to be  distributed  to the Members  pursuant to the plan shall be distributed in
the manner set forth in Section12.3 as though the Company were being liquidated.
For  this  purpose  only,  the fair  market  value  of the  securities  or other
consideration to be received  pursuant to the plan shall be treated as "Profits"
and the  capital  accounts  of the  Members  shall be  increased  in the  manner
provided in Section 6.6. No Member shall be entitled to any appraisal or similar
rights in connection with a plan contemplated by this Section 10.6.


     ARTICLE XI - OPTIONAL PURCHASE OF MEMBERSHIP INTERESTS ON CERTAIN EVENTS

     11.1 Death.  Upon the death of a Physician Member,  the deceased  Physician
Member's  executor,  administrator,  or other legal or  personal  representative
shall give written notice of that fact to the Membership. The Manager shall have
the option to purchase at the Closing (as defined below) the Membership Interest
of the deceased  Physician Member (whose executor,  administrator or other legal
or personal  representative  shall then become obligated to sell such Membership
Interest) at the price determined in the manner provided in Section 11.6 of this
Agreement  and on the terms and  conditions  provided  in  Section  11.7 of this
Agreement.  The Manager  shall have a period of thirty (30) days  following  the
date it first  received  notice  of the  death  of the  Physician  (the  "Option
Period")  within which to notify in writing the deceased  Physician's  executor,
administrator  or other  legal or personal  representative,  whether the Manager
desires to purchase all or a portion of the Membership  Interest of the deceased
Member. If the Manager does not elect to purchase the entire Membership Interest
of the deceased  Physician Member before the expiration of the Option Period and
in the manner provided

                                      -30-
<PAGE>

herein,  the portion of the Membership  Interest not purchased  shall be held by
the  deceased  Physician   Member's  executor,   administrator  or  other  legal
representative pursuant to the terms of this Agreement. The Manager, in its sole
discretion,  may elect to assign its rights to purchase the Membership  Interest
of a deceased  Physician  Member  under this Section 11.1 to the Company and, in
such case,  the Company  shall have the same rights as provided  for the Manager
under this Section 11.1.
 
     11.2  Bankruptcy,  Insolvency or  Assignment  for Benefit of Creditors of a
Physician Member. In the event that an involuntary or voluntary proceeding under
the Federal  Bankruptcy Code, as amended,  is filed for or against any Physician
Member,  or if any Physician  Member shall make an assignment for the benefit of
his or her  creditors,  or if any  Physician  Member has a receiver or custodian
appointed for his assets,  or any Physician Member generally fails to pay his or
her debts when due, the  insolvent  Physician  Member shall give written  notice
(the  "Notice of  Insolvency")  to the Manager of the  commencement  of any such
proceeding or the  occurrence of such event within five days of the first notice
to him or her of such  commencement  or  occurrence  of such event.  The Manager
shall  have the  option to  purchase  at the  Closing  (as  defined  below)  the
Membership Interest of the insolvent Physician Member (which insolvent Physician
Member  or  his  trustee,  custodian,   receiver  or  other  personal  or  legal
representative,  as the case may be,  shall then become  obligated  to sell such
Membership  Interest)  at  the  price  determined  in  the  manner  provided  in
Article 11.6  of this  Agreement  and on the terms and  conditions  provided  in
Article 11.7 of this  Agreement.  The Manager shall have a period of thirty (30)
days  following the date of either the Notice of  Insolvency,  or if such formal
notice is not given,  the date the Manager  first becomes aware of the financial
condition of the Physician  Member as outlined in this Article 11.2 (the "Option
Period"),  within which to notify in writing the insolvent  Physician  Member or
his trustee,  custodian,  receiver,  or other legal or personal  representative,
whether  the  Manager  wishes to  purchase  all or a portion  of the  Membership
Interest of the  insolvent  Physician  Member.  If the Manager does not elect to
purchase the entire Membership Interest of the insolvent Physician Member before
the  expiration  of the Option  Period and in the manner  provided  herein,  the
portion of the Membership  Interest not purchased shall be held by the insolvent
Member,   his   trustee,   custodian,   receiver  or  other  legal  or  personal
representative pursuant to the terms of this Agreement. The Manager, in its sole
discretion,  may elect to assign its rights to purchase the Membership  Interest
of an insolvent  Physician Member under this Section 11.2 to the Company and, in
such case,  the Company  shall have the same rights as provided  for the Manager
under this Section 11.2.

     11.3  Breach of Section  5.6. In the event the  Manager  either  receives a
Notice of Withdrawal  as provided in Section 5.6 or receives  notice of a breach
of Section 5.6 by a Physician Member (the "Defaulting  Physician  Member"),  the
Manager  may  elect,  in its sole  discretion,  to treat such event as a default
under this  Agreement  and enforce the  provisions  of this Section 11.3. If the
Manager elects to enforce the provisions of this Section 11.3, the Manager shall
give written notice of such election (the "Notice of Default") to the Defaulting
Physician  Member within 180 days of the date the Manager first received  notice
of the defaulting  event.  Upon giving the Notice of Default,  the Manager shall
have the option to purchase at the  Closing  (as defined  below) the  Membership
Interest of the Defaulting  Physician Member (which Defaulting  Physician Member
shall then  become  obligated  to sell such  Membership  Interest)  at the price
determined in the manner  provided in Section 11.6 of this  Agreement and on the
terms and  conditions  provided in Section 11.7 of this  Agreement.  The Manager
shall  have a period of thirty  (30) days  following  the date of the  Notice of
Default (the "Option  Period")  within which to notify in writing the Defaulting
Physician Member, whether the Manager wishes to purchase

                                      -31-
<PAGE>

all or a portion of the Membership Interest of the Defaulting  Physician Member.
If the Manager does not elect to purchase the entire Membership  Interest of the
Defaulting  Physician  Member before the  expiration of the Option Period and in
the manner provided herein, the portion of the Membership Interest not purchased
shall be held by the Defaulting  Physician  Member pursuant to the terms of this
Agreement.  The Manager, in its sole discretion,  may elect to assign its rights
to purchase the Membership Interest of a Defaulting  Physician Member under this
Section 11.3 to the Company and, in such case,  the Company  shall have the same
rights as provided for the Manager under this Section 11.3.

     11.4 Domestic Proceeding.  In the event that a spouse of a Physician Member
commences  against a  Physician  Member,  or a  Physician  Member is named in, a
Domestic Proceeding, the Physician Member shall give written notice (the "Notice
of  Domestic  Proceeding")  to the  Manager  of  the  commencement  of any  such
proceeding  within  five  days  of the  first  notice  to  him  or  her of  such
commencement.  The Manager  shall have the option to purchase at the Closing (as
defined below) the Membership  Interest of the Physician  Member involved in the
Domestic  Proceeding (which Physician Member shall then become obligated to sell
such  Membership  Interest),  at the price  determined in the manner provided in
Section  11.6 of this  Agreement  and on the terms and  conditions  provided  in
Section 11.7 of this  Agreement.  The Manager shall have a period of thirty (30)
days following the date of either the Notice of Domestic Proceeding,  or if such
formal  notice is not given,  the date the Manager  first  becomes  aware of the
domestic  circumstances of the Physician Member as provided in this Section 11.4
(the "Option  Period"),  within which to notify in writing the Physician  Member
involved in the Domestic Proceeding,  whether the Manager wishes to purchase all
or a portion of the Membership Interest of such Physician Member. If the Manager
does not elect to  purchase  the  Membership  Interest of the  Physician  Member
involved in the Domestic  Proceeding  before the expiration of the Option Period
and in the manner provided  herein,  the portion of the Membership  Interest not
purchased  shall be held by such Physician  Member pursuant to the terms of this
Agreement.  The Manager, in its sole discretion,  may elect to assign its rights
to purchase the  Membership  Interest of the  Physician  Member  involved in the
Domestic  Proceeding  under this  Section 11.4 to the Company and, in such case,
the Company  shall have the same rights as provided  for the Manager  under this
Section 11.4.

     11.5  Divestiture  Option.  If state  or  federal  regulations  or laws are
enacted or applied,  or if any other legal  developments  occur,  which,  in the
opinion of the Manager  adversely affect (or potentially  adversely  affect) the
operation of the Membership  (e.g.,  the enactment or application of prohibitory
physician  self-referral  legislation  against the Company or its Members),  the
Manager shall promptly either, in its discretion, (i) take the steps outlined in
this Section 11.5 to divest the Physician Members of their Membership Interests,
or (ii) dissolve the Company as provided in Article XII. If the Manager  chooses
option (i), it shall deliver a written  notice to all of the  Physician  Members
(the "Notice of Election")  and purchase such  Membership  Interests for its own
account.  The purchase  price to be paid for each  Membership  Interest shall be
determined  in the manner as provided in Section  11.6 and shall be on the terms
and  conditions  as provided in Section  11.7.  The  transfer of the  Membership
Interests  and the payment of the purchase  price (as provided in Section  11.6)
shall  be made at such  time as  determined  by the  Manager  to be in the  best
interests of the Company and its Physician Members. Each Physician Member hereby
makes,  constitutes and appoints the Manager,  with full power of  substitution,
his true and lawful  attorney-in-fact,  to take such  actions and  execute  such
documents  on his behalf to effect the  transfer of his  Membership  Interest as
provided in this Section 11.5.

                                      -32-
<PAGE>


     11.6  Purchase  Price.  The  purchase  price to be paid for the  Membership
Interest of any Physician  Member whose interest is being purchased  pursuant to
the  provisions of  Article 17.1,  17.2,  17.3,  17.4 or 17.5 (the  "Withdrawing
Physician  Member")  shall be determined in the manner  provided in this Article
17.6. The purchase price for the Membership  Interest  purchased pursuant to the
provisions of Sections 11.2,  11.3, 11.4 or 11.5 shall be an amount equal to the
lesser  of (i) the fair  market  value  of the  Withdrawing  Physician  Member's
Membership  Interest on the  Valuation  Date  (prorated in the event that only a
portion of his or her Membership  Interest is being  purchased) as determined by
an Appraiser (as defined below) selected by the Manager, or (ii) the Withdrawing
Physician  Member's share of the Company's book value, if any,  (prorated in the
event that only a portion of his or her Membership  Interest is being purchased)
as  reflected  by the  Capital  Account  of  the  Withdrawing  Physician  Member
(unadjusted   for  any   appreciation  in  Company  assets  and  as  reduced  by
depreciation  deductions  claimed by the  Company  for tax  purposes)  as of the
Valuation  Date (as defined  below).  In the case of a purchase of a  Membership
Interest pursuant to the provisions of Section 11.1, the purchase price shall be
an amount equal to the greater of (i) two (2) times the aggregate  distributions
made with respect to such Membership Interest pursuant to Section 9.1 during the
twelve-month  period  ending  on the  Valuation  Date  or (ii)  the  Withdrawing
Physician  Member's share of the Company's  book value  determined in the manner
described  above.  For the purposes of this Section 11.6,  the term  "Appraiser"
shall mean an  independent  appraiser who is qualified in appraising  membership
interests and who has at least five years experience. In determining fair market
value, the Appraiser shall take into consideration any outstanding indebtedness,
liabilities,  liens and  obligations of the Company and the relative  Membership
Interests and capital accounts of all Members, as well as applying any customary
discounts for lack of liquidity and control.  Such appraisal  shall be conducted
in  accordance  with  professional  appraisal  standards.  The  valuation of the
Appraiser  shall be conclusive  and binding upon the Company,  the purchaser and
the  Withdrawing   Physician  Member  and  his  or  her   representatives.   The
determination  of the  Withdrawing  Physician  Member's  Capital  Account on the
Valuation  Date  (as  defined  below)  shall be made by the  Company's  internal
accountant  (the "Company  Accountant")  upon a review of the Company's books of
account,  and a formal audit is expressly  waived.  The statement of the Company
Accountant  with  respect to the Capital  Account of the  Withdrawing  Physician
Member on the Valuation Date shall be binding and  conclusive  upon the Company,
the purchaser and the Withdrawing  Physician Member and his representative.  The
Manager, in its sole discretion,  may pursue both of the above valuation methods
and choose the lesser value of the two as indicated  above, or may designate and
follow only one of the methods in calculating the purchase price.  The Valuation
Date shall be the last day of the month immediately preceding the month in which
occurs: (i) the death of a Physician Member, in the case of a purchase by reason
of death;  (ii) the bankruptcy or insolvency of a Physician  Member, in the case
of a purchase by reason of such  bankruptcy or  insolvency;  (iii) the Notice of
Withdrawal or breach of Section 5.6 as provided in Article 11.3 in the case of a
purchase by reason thereof; (iv) the commencement of the Domestic Proceeding, in
the case of a  purchase  by reason  thereof;  or (v) the Notice of  Election  as
provided  in Section  11.5,  in the case of a purchase  by reason  thereof.  Any
Physician  Member  whose  Membership  Interest  is  purchased  pursuant  to  the
provisions  of Section  11.2,  11.3,  11.4 or 11.5 shall be entitled only to the
purchase  price which shall be paid at the Closing in cash (or by  certified  or
cashier's  check) and shall not be entitled to any  Company  distributions  made
after the Valuation Date. The transfer of a Membership Interest of a Withdrawing
Physician  Member  shall be  deemed  to occur as of the  Valuation  Date and the
Withdrawing Physician Member shall have no voting or other rights as a Physician
Member after such date. The purchaser shall be entitled to any

                                      -33-
<PAGE>

distributions  attributable to the transferred interest after the Valuation Date
and the  Company  shall  have  the  right  to  deduct  the  amount  of any  such
distributions made to the Withdrawing  Physician Member after the Valuation Date
from the purchase price.

     11.7 Closing of Purchase and Sale.  The Closing of any purchase and sale of
a Membership Interest pursuant to Section 11.1, 11.2, 11.3, 11.4 or 11.5 of this
Agreement shall take place at the principal office of the Company, or such other
place  designated  by the  Manager,  on the  date  determined  as  follows  (the
"Closing"):

     (a) In the case of a purchase and sale  occurring by reason of the death of
a Physician  Member as provided in Section 11.1 of this  Agreement,  the Closing
shall be held on the thirtieth  day (or if such  thirtieth day is not a business
day, the next business day following the thirtieth  day) next following the last
to occur of:

     (i) Qualification of the executor or personal administrator of the deceased
Physician Member's estate;

     (ii) The date on which any necessary determination of the purchase price of
the Membership Interest to be purchased has been made; or

     (iii) The date that coincides with the close of the Option Period.

     (b) In  the  case  of a  purchase  and  sale  occurring  by  reason  of the
occurrence of one of the events described in Section 11.2, 11.3, 11.4 or 11.5 of
this  Agreement,  the  Closing  shall be held on the  thirtieth  day (or if such
thirtieth  day is not a  business  day,  the next  business  day  following  the
thirtieth day) next following the later to occur of:

     (i) The date on which any necessary  determination of the purchase price of
the Membership Interest to be purchased has been made; or

     (ii) The date that coincides with the close of the Option Period.

     At the  Closing,  although  not  necessary  to  effect  the  transfer,  the
Withdrawing  Physician Member shall  concurrently with tender and receipt of the
applicable purchase price, deliver to the purchaser duly executed instruments of
transfer and assignment,  assigning good and marketable  title to the portion or
portions of the Withdrawing  Physician Member's entire Membership  Interest thus
purchased,  free and clear  from any liens or  encumbrances  or rights of others
therein. The parties acknowledge that occurrence of any of the triggering events
described in Section 11.1,  11.2, 11.3, 11.4 or 11.5 and compliance with all the
Articles of this  Agreement,  except the execution of the transfer  documents by
the Withdrawing Member as provided above in this Section 11.7, are

                                      -34-
<PAGE>

sufficient to effect the complete transfer of the Withdrawing Physician Member's
interest  and the  Withdrawing  Physician  Member  shall be deemed to consent to
admission of the transferee as a substitute  Physician  Member.  Notwithstanding
the date of the Closing or whether a Closing is successfully  held, the transfer
of a Membership  Interest of a Withdrawing  Physician  Member shall be deemed to
occur as of the Valuation Date as defined in Section 11.6.  The deemed  transfer
is effective regardless of whether the Withdrawing Physician Member performs the
duties set forth in this Section 11.7.

     11.8  Terms and  Conditions  of  Purchase.  The  Membership  Interest  of a
Physician  Member shall not be transferred to any Member unless the requirements
of Sections 10.2 and 10.4 (b) through (g) are satisfied  with respect to it. The
purchaser shall be liable for all  obligations  and  liabilities  connected with
that  portion of the  Membership  Interest  transferred  to it unless  otherwise
agreed in writing.


            ARTICLE XII - DISSOLUTION AND LIQUIDATION OF THE COMPANY

     12.1 Dissolution  Events.  The Company will be dissolved upon the happening
of any of the following events:

     (a) The expiration of its term on December 31, 2047;

     (b) The filing by, on behalf of, or against the Manager of any  petition or
pleading,  voluntary or involuntary,  to declare the Manager  bankrupt under any
bankruptcy  law or act,  or the  commencement  in any  court of any  proceeding,
voluntary or involuntary,  to declare the Manager insolvent or unable to pay its
debts, or the  appointment by any court or supervisory  authority of a receiver,
trustee or other custodian of the property, assets or business of the Manager or
the  assignment  by it of all or any  part of its  property  or  assets  for the
benefit  of  creditors,  if  said  action,  proceeding  or  appointment  is  not
dismissed,  vacated  or  otherwise  terminated  within  ninety  (90) days of its
commencement;

     (c) The determination of the Manager and Executive  Committee in accordance
with Section 4.1(d) that the Company should be dissolved;

     (d) The  approval  of a plan by the  Manager  and  Executive  Committee  in
accordance with Section 4.1(c)  providing for the merger,  consolidation or sale
of Membership Interests as described in Section 10.6;

     (e) The  election  of the Manager to dissolve  the  Company  following  the
occurrence of an event described in Article 11.5;

     (f) The sale,  exchange or other disposition of all or substantially all of
the  Property  of the  Company  without  making  provision  for the  replacement
thereof; or

                                      -35-
<PAGE>

     (g) Any other event  resulting in the  dissolution  or  termination  of the
Company under the laws of the State of Kentucky.

     12.2  Continuation.  Upon the occurrence of any of the events  described in
Section  12.1(b) above with respect to the Manager,  the business of the Company
will be  continued  if within  ninety (90)  calendar  days all of the  remaining
Members  elect to continue the  business of the Company.  If the Members fail to
continue the Company's business as provided in this Section, the Company will be
liquidated under Section 12.3.

     12.3  Liquidation.  Upon the  happening  of any of the events  specified in
Section  12.1 and, if  applicable,  the failure to continue  the business of the
Company under Section 12.2, the Manager, or any liquidating trustee elected by a
Majority in Interest of the Members, will commence as promptly as practicable to
wind up the  Company's  affairs  unless the Manager or the  liquidating  trustee
(either, the "Liquidator")  determines that an immediate  liquidation of Company
assets would cause undue loss to the Company, in which event the liquidation may
be deferred for a time determined by the Liquidator to be appropriate. Assets of
the  Company  may be  liquidated  or  distributed  in  kind,  as the  Liquidator
determines  to be  appropriate.  The Members will continue to share Company Cash
Flow,  Profits  and Losses  during the period of  liquidation  in the manner set
forth in Articles  VIII and IX. The proceeds  from  liquidation  of the Company,
including  repayment  of any debts of Members to the  Company,  and any  Company
assets that are not sold in connection with the  liquidation  will be applied in
the following order of priority:

     (a) To payment of the debts and  satisfaction  of the other  obligations of
the Company, including without limitation debts and obligations to Members;

     (b)  To  the  establishment  of  any  reserves  deemed  appropriate  by the
Liquidator for any  liabilities  or  obligations of the Company,  which reserves
will be held for the purpose of paying  liabilities or  obligations  and, at the
expiration of a period the Liquidator deems appropriate,  will be distributed in
the manner provided in Section 12.3(c); and

     (c) To the  payment  to the  Members  of the  positive  balances  in  their
respective Capital Accounts, pro rata, in proportion to the positive balances in
those capital accounts after giving effect to all allocations under Article VIII
and all  distributions  under  Article IX for all prior  periods,  including the
period during which the process of liquidation occurs.
 
     12.4 Articles of  Dissolution.  Upon the  dissolution and completion of the
winding up of the Company,  the Manager shall cause a Articles of Dissolution to
be executed on behalf of the Company and filed with the Secretary of State,  and
the Manager shall execute,  acknowledge  and file any and all other  instruments
necessary  or  appropriate  to reflect  the  dissolution  and  winding up of the
Company.


                                      -36-
<PAGE>


                          ARTICLE XIII - MISCELLANEOUS

     13.1 Fiscal Year.  The Fiscal Year will end on December 31, unless  another
fiscal year-end is selected by the Managers.

     13.2  Records.  Proper and complete  records and books of account  shall be
kept by the  Manager  in  which  shall  be  entered  fully  and  accurately  all
transactions  and such other matters  relating to the Company's  business as are
usually entered into records and books of account  maintained by persons engaged
in business of like character.  The records of the Company will be maintained at
the  principal  place of business of the Company,  or at any other  location the
Manager  selects  provided  that  the  Company  keep at its  principal  place of
business the records  required by the Act to be  maintained  there.  Appropriate
records  in  reasonable   detail  will  be  maintained  to  reflect  income  tax
information  for the  Members.  Each  Member may  inspect and make copies of the
records  maintained by the Company  during  reasonable  business  hours and upon
reasonable  notice.  Each Member, at his or her expense,  may make copies of the
records  maintained  by the  Company  and may  require  an audit of the books of
account maintained by the Company to be conducted by the independent accountants
for the Company.

     13.3 Reports. The Manager, at the expense of the Company,  will cause to be
prepared in accordance  with the method of  accounting  then used by the Company
and  distributed  to each Member  within  ninety (90) days after the end of each
Fiscal Year,  a balance  sheet as of the close of the Fiscal Year and the annual
income tax returns and related schedules of the Company for the Fiscal Year.

     13.4  Reserves.  The  Manager  may cause the  Company to create  reasonable
reserve  accounts  to  be  used  exclusively  for  repairs  and  acquisition  of
Additional Assets and for any other valid Company purpose.  The Manager shall in
its sole discretion determine the amount of payments to such reserve accounts.

     13.5  Notices.  The  Manager  will  notify the Members of any change in the
name,  principal or registered  office or registered  agent of the Company.  Any
notice or other  communication  required by this  Agreement  must be in writing.
Notices  and  other  communications  will be  deemed  to have  been  given  when
delivered by hand or dispatched by telegraph, telex or other means of electronic
facsimile  transmission,  or three  business  days after being  deposited in the
United States mail, postage prepaid,  addressed to the Member to whom the notice
is  intended  to be given at his or her  address set forth on Schedule I of this
Agreement  or, in the case of the Company,  to its  principal  place of business
provided  for in Section  1.4. A Person may change his or her notice  address by
notice in  writing to the  Company  and to each other  Member  given  under this
Section 13.5.

     13.6 Amendments.  Except as expressly provided in this Agreement in Section
4.1(h),  no  amendment  of this  Agreement  will be  valid or  binding  upon the
Members, nor will any waiver of any term of this Agreement be effective,  unless
in  writing  and signed by the  Manager  and a  majority  of the  members of the
Executive Committee.

     13.7 Additional Documents. Each party agrees to execute and acknowledge all
documents and writings  which the Manager may deem necessary or expedient in the
creation of this Company and

                                      -37-
<PAGE>

the  achievement  of its  purpose,  specifically  including  but not limited to,
articles  of  organization  and all  amendments,  as  well  as any  cancellation
thereof.

     13.8 Representations of Members. Each Member represents and warrants to the
Company and every other  Member that (s)he (a) is fully aware of, and is capable
of bearing,  the risks relating to an investment in the Company, (b) understands
that his or her  interest  in the  Company  has not been  registered  under  the
Securities  Act or the  securities  law of any  jurisdiction  in  reliance  upon
exemptions  contained in those laws, and (c) has acquired his or her interest in
the  Company  for his or her own  account,  with the  intention  of holding  the
interest for investment and without any intention of  participating  directly or
indirectly  in any  redistribution  or resale of any portion of the  interest in
violation of the Securities Act or any applicable law.

     13.9  Survival  of  Rights.  Except as  herein  otherwise  provided  to the
contrary,  this Agreement  shall be binding upon and inure to the benefit of the
parties, their successors and assigns.

     13.10 Interpretation and Governing Law. When the context in which words are
used in this Agreement indicates that such is the intent,  words in the singular
number  shall  include the plural and vice versa.  The  masculine  gender  shall
include the feminine and neuter.  The Article and Section headings or titles and
the table of contents shall not define,  limit, extend or interpret the scope of
this Agreement or any  particular  Article or Section.  This Agreement  shall be
governed  and  construed  in  accordance  with the laws of the State of Kentucky
without giving effect to the conflicts of laws provisions thereof.

     13.11  Severability.  If any  provision,  sentence,  phrase or word of this
Agreement or the application thereof to any Person or circumstance shall be held
invalid, the remainder of this Agreement,  or the application of such provision,
sentence,  phrase, or word to Persons or  circumstances,  other than those as to
which it is held invalid, shall not be affected thereby.

     13.12 Agreement in Counterparts.  This Agreement may be executed in several
counterparts,  each of which shall be deemed an original, but all of which shall
constitute one and the same instrument.  In addition, this Agreement may contain
more than one  counterpart  of the  signature  pages and this  Agreement  may be
executed by the affixing of the signatures of each of the Members to one of such
counterpart signature pages; all of such signature pages shall be read as though
one,  and they shall have the same force and effect as though all of the signers
had signed a single signature page.

     13.13 Tax Matters Partner.  For purposes of this Agreement,  the Manager is
designated as the Tax Matters Partner (as defined in Section 6231 of the Code).

     13.14  Third  Parties.   The  agreements,   covenants  and  representations
contained  herein are for the benefit of the parties hereto inter se. Nothing in
this  Agreement  is  intended to benefit any third  parties  including,  without
limitation,  any creditor of the Company  and/or any Member.  No creditor of the
Company or any Member  will be  entitled  to require  the  Manager to solicit or
accept any loan or additional capital contribution for the Company or to enforce
any right  which the  Company or any Member may have  against a Member,  whether
arising under this Agreement or otherwise.


                                      -38-
<PAGE>

     13.15 Power of Attorney.  Each Physician  Member hereby makes,  constitutes
and appoints Dr. Joseph Jenkins and Thomas Driber, Ph.D.,  severally,  with full
power of substitution, his true and lawful attorneys-in-fact, for him and in his
name, place and stead and for his use and benefit to sign and acknowledge,  file
and record,  any amendments  hereto among the Members for the further purpose of
executing and filing on behalf of each Physician Member, any and all articles of
organization or other documents necessary to constitute the Company or to effect
the  continuation  of the Company,  the admission or withdrawal of members,  the
qualification  of the Company in a foreign  jurisdiction  (or  amendment to such
qualification),  the  admission  of  substitute  Members or the  dissolution  or
termination of the Company, provided such continuation,  admission,  withdrawal,
qualification,  or dissolution  and termination are in accordance with the terms
of this Agreement.

     The foregoing power of attorney is a special power of attorney coupled with
an interest,  is irrevocable and shall survive the death or legal  incapacity of
each Member.  It may be exercised by any one of said attorneys by listing all of
the Members executing any instrument over the signature of the  attorney-in-fact
acting for all of them.  The power of attorney  shall survive the delivery of an
assignment  by a Member of the whole or any portion of his Unit.  In those cases
in which the assignee of, or the  successor  to, a Member owning a Unit has been
approved by the Members for admission to the Company as a substitute Member, the
power of attorney  shall survive for the sole purpose of enabling the Manager to
execute,   acknowledge  and  file  any  instrument   necessary  to  effect  such
substitution.

     This power of attorney shall not be affected by the  subsequent  incapacity
or mental incompetence of any Member.

     13.16  Arbitration.  Any dispute  arising out of or in connection with this
Agreement  or the breach  thereof  shall be decided by  arbitration  in Raleigh,
North  Carolina in accordance  with the then  effective  commercial  arbitration
rules of the  American  Arbitration  Association,  and  judgment  thereof may be
entered in any court having jurisdiction thereof.




     [The remainder of this page is intentionally left blank.]












                                                      -39-
<PAGE>

     IN WITNESS WHEREOF, the undersigned,  being the Manager and initial Members
of the Company,  have caused this Agreement to be duly adopted by the Company as
of the _____ day of _________, 199__, and do hereby assume and agree to be bound
by and to perform all of the terms and provisions set forth in this Agreement.

                                           MANAGER:

                                           PRIME KIDNEY STONE TREATMENT, INC.,
                                           a New Jersey corporation
Attest:

                                           By:                                 
__________________________                  Thomas Driber, Ph.D., Vice President
         Secretary
                                           MEMBER:


                                           PRIME KIDNEY STONE TREATMENT, INC.,
                                           a New Jersey corporation

                                           By:                                 
                                            Thomas Driber, Ph.D., Vice President


                                                      -40-
<PAGE>

                           COUNTERPART SIGNATURE PAGE


     By signing this  Counterpart  Signature Page, the undersigned  acknowledges
his or her  acceptance  of  that  certain  Operating  Agreement  of  Kentucky  I
Lithotripsy, LLC, and his or her intention to be legally bound thereby.

                  Dated this _________ day of ___________________, 199_.



                                    ---------------------------------------

                                    Signature



                                    -----------------------------------------

                                    Printed Name




STATE OF _______________                    )
                                            )
COUNTY OF _____________                     )


     BEFORE ME, the  undersigned  Notary  Public in and for the State and County
set forth  above,  on the _______ day of  __________________,  199_,  personally
appeared  ___________________,  and,  being by me first duly sworn,  stated that
(s)he signed this Counterpart Signature Page for the purpose set forth above and
that the statements contained therein are true.




                                    -----------------------------------------

                                    Signature of Notary Public



                                    ------------------------------------------

                                    Printed Name of Notary

My Commission Expires:

___________________________

[SEAL]

                                                      -41-
<PAGE>

               OPERATING AGREEMENT OF KENTUCKY I LITHOTRIPSY, LLC

                                   SCHEDULE I


Names and Address                     Initial Capital
    of Members                         Contribution         Percentage Interest


Prime Kidney Stone Treatment, Inc.       $50,000                   20%
1301 Capital of Texas Highway
Suite C-300
Austin, TX  78746

Limited partners as a whole             $200,000                   80%



     TOTALS                             $250,000                  100%




     (1) Represents the principal portion of each Member's guaranty  obligation,
as each Member's obligation under the Guaranty includes not only principal,  but
also (as provided in the  Guaranty)  accrued and unpaid  interest,  late payment
penalties  and all  costs  incurred  by the  Bank in  collecting  any  defaulted
obligations.  The  principal  amount of the loan is  $550,000.  The Manager will
guarantee  20% of the Loan (a $110,000  principal  guaranty)  as provided in the
Memorandum.  The  Physician  Members  will  guarantee  1% of the loan (a  $5,500
principal guaranty) for each Unit purchased as provided in the Memorandum.


                                                      -42-

____________________________                    _______________________________
Name of Prospective Investor                            Memorandum No.


 





                TENNESSEE VALLEY LITHOTRIPTER LIMITED PARTNERSHIP
 
            A Limited Partnership Formed Under the Laws of Tennessee


                    CONFIDENTIAL PRIVATE PLACEMENT MEMORANDUM


                             Up to $729,120 in Cash
 
                                 Up to 80 Units
                         of Limited Partnership Interest




         THIS MEMORANDUM IS PROVIDED TO THE PROSPECTIVE INVESTOR WHOSE
          NAME APPEARS ABOVE SUBJECT TO THE TERMS OF A CONFIDENTIALITY
          AGREEMENT WHICH PROHIBITS DISTRIBUTION OF THIS MEMORANDUM BY
       SUCH PERSON TO ANYONE OTHER THAN PERSONS RETAINED BY THE INVESTOR
        TO PROVIDE ADVICE WITH RESPECT TO THE MATTERS HEREIN ADDRESSED.




                            MEDTECH INVESTMENTS, INC.
                              Exclusive Sales Agent
                                2008 Litho Place
                       Fayetteville, North Carolina 28304
                                 1-800-682-7971
                 The Date of this Memorandum is October 24, 1998

                                   
                                       -i-
<PAGE>

 
                TENNESSEE VALLEY LITHOTRIPTER LIMITED PARTNERSHIP

                             Up to $729,120 in Cash

                 Up to 80 Units of Limited Partnership Interest
                           at $9,114 in Cash per Unit

     Tennessee Valley  Lithotripter  Limited  Partnership,  a Tennessee  limited
partnership  (the  "Partnership"),  organized  by  its  General  Partner,  Prime
Lithotripter  Operations,  Inc., a New York corporation,  d/b/a Tennessee Valley
Lithotripter  (the  "General  Partner"),  hereby  offers  on the terms set forth
herein up to 80 units of  limited  partnership  interest  (the  "Units")  in the
Partnership (the  "Offering").  The purpose of the Partnership is to operate the
mobile  lithotripsy  business  currently  operated by the General  Partner  (the
"Business") at various  locations  primarily in northern  Alabama,  northeastern
Arkansas, western Kentucky,  Tennessee and other areas determined by the General
Partner (the  "Service  Area").  Upon the closing of the  Offering,  the General
Partner will  transfer  substantially  all the  operating  assets and rights and
obligations  under certain  contracts related to the Business to the Partnership
in exchange for a minimum initial 80% interest in the Partnership. See "Proposed
Activities."

     The Units are  divided  into 80 Units  offered  at a per Unit cash price of
$9,114.  Prospective Investors who meet certain requirements may be able to fund
a portion of their Unit purchase price with the proceeds of certain  third-party
financing.  See  "Terms of the  Offering  - Limited  Partner  Loans."  Each Unit
represents a 0.25%  economic  interest in the  Partnership.  The  Offering  will
terminate on the earlier of the date all 80 Units are sold or  December 4,  1998
unless,  in the discretion of the General  Partner,  it is sooner  terminated or
extended  for a  period  of up to  180  days.  The  Unit  cash  price  is due at
subscription  except for the portion to be funded with  proceeds  from the loans
described above.
                                 _______________

     The purchase of Units involves  significant  risks and is suitable only for
persons of substantial  means who have no need for liquidity in this investment.
Among other factors,  prospective Investors should note that (1) the Partnership
faces severe competition in the Service Area and (2) the health care industry is
undergoing  significant  government  regulatory reforms.  See "Risk Factors" and
"Terms of the Offering - Suitability Standards."
                                                                     

                                                                       Net
                      Cash                    Selling                  Cash
                  Offering Price           Commissions(1)           Proceeds (2)
Per Unit (3)         $9,114                  $     250               $    8,864

                                        
Total Maximum (4)  $729,120                  $  20,000                 $709,120

(See Footnotes on Back of Cover Page)

     See Glossary for capitalized terms used herein and not otherwise defined.
                                                                


                                      -ii-
<PAGE>

(1)  The Units  will be sold on a "best  efforts"  any or all  basis by  MedTech
     Investments,  Inc., a  broker-dealer  registered  with the  Securities  and
     Exchange Commission and a member of the National  Association of Securities
     Dealers,  Inc. (the "Sales Agent").  MedTech is an Affiliate of the General
     Partner.  The  Partnership  will pay the Sales Agent a $250  commission for
     each Unit  sold and will  reimburse  the Sales  Agent for its out of pocket
     offering  costs  (not to exceed  $15,000).  The  Partnership  has agreed to
     indemnify  the  Sales  Agent   against   certain   liabilities,   including
     liabilities under the Securities Act. See "Plan of Distribution."

(2)  Net Cash  Proceeds do not  reflect  deduction  of  expenses  payable by the
     Partnership.  See "Sources and Applications of Funds" and "Compensation and
     Reimbursement  to the General  Partner and its  Affiliates."  The price per
     Unit ($9,114) is payable in cash in full at  subscription;  provided,  that
     prospective  Investors who meet certain  requirements may be able to fund a
     portion  of  their  Unit  purchase  price  with  the  proceeds  of  certain
     third-party  financing.  The  Partnership  has arranged for  financing of a
     portion  of the Units'  purchase  price  with  First-Citizens  Bank & Trust
     Company,  Fayetteville,  North Carolina (the "Bank"). Therefore, in lieu of
     paying  the  entire  purchase  price in cash at  subscription,  prospective
     Investors may execute and deliver to the Sales Agent upon delivery of their
     Subscription  Packets, at least $2,500 cash and a Limited Partner Note in a
     maximum  principal amount of up to $6,614 per Unit to be purchased,  a Loan
     and Security Agreement,  Security Agreement and two Uniform Commercial Code
     Financing Statements ("UCC-1s") (collectively,  the "Loan Documents").  See
     "Terms  of the  Offering  -  Limited  Partner  Loans"  and the forms of the
     Limited  Partner  Note,  the  Loan  and  Security  Agreement  and  Security
     Agreement  attached  to  the  Bank  Commitment  as  Exhibits  A,  B and  C,
     respectively, which is attached hereto as Appendix C and the UCC's attached
     as part of the Subscription Packet.

(3)  Each Investor may purchase no less than one Unit.

(4)  All  subscription  funds  and Loan  Documents  will be held in an  interest
     bearing  escrow  account with  First-Citizens  Bank & Trust  Company,  with
     offices in Fayetteville and Raleigh,  North Carolina,  until the Closing or
     the termination of the Offering.  The Partnership seeks by this Offering to
     sell up to 80  Units  for up to  $729,120  in cash  ($709,120  net of Sales
     Agent's commissions).  In the event one or more complete  subscriptions are
     timely received and accepted by the General Partner, the subscription funds
     (plus  interest) in escrow will be released to the Partnership and the Loan
     Documents  will be released to the Bank. If no  subscriptions  are received
     and  accepted,  the  Offering  will be  terminated  and  all  subscriptions
     canceled.  In the event of termination,  all  subscription  funds (together
     with  interest),  Loan Documents and other  subscription  documents will be
     promptly returned to the Investors.  Neither the General Partner nor any of
     its Affiliates will purchase any Units.
                                 ______________




                                      -iii-
<PAGE>

     THE  UNITS  ARE  BEING  OFFERED  PURSUANT  TO:  (1) AN  EXEMPTION  FROM THE
REGISTRATION REQUIREMENTS OF THE SECURITIES ACT OF 1933, AS AMENDED, PROVIDED IN
SECTION 4(2) THEREOF AND RULE 506 OF  REGULATION D  PROMULGATED  THEREUNDER,  AS
AMENDED;  (2) AN EXEMPTION FROM REGISTRATION  PROVIDED IN THE ALABAMA SECURITIES
ACT,  AS  AMENDED,  AND A POLICY  STATEMENT  ISSUED  BY THE  ALABAMA  SECURITIES
COMMISSION;  (3) AN EXEMPTION FROM REGISTRATION PROVIDED IN SECTION 23-42-509(c)
OF THE ARKANSAS  CODE OF 1957  ANNOTED,  AS AMENDED,  AND RULE  509.01(B) OF THE
REGULATIONS   PROMULGATED   THEREUNDER,   AS  AMENDED;  (4)  AN  EXEMPTION  FROM
REGISTRATION  PROVIDED IN THE SECURITIES ACT OF KENTUCKY, AS AMENDED; AND (5) AN
EXEMPTION  FROM  REGISTRATION  PROVIDED  IN  SECTIONS   48-2-102(14)(F)(iv)  AND
48-2-125(b)   OF  THE   TENNESSEE   CODE   ANNOTATED,   AS  AMENDED,   AND  RULE
0780-4-2-.12(1)(c)  OF THE REGULATIONS  PROMULGATED  THEREUNDER,  AS AMENDED.  A
REGISTRATION  STATEMENT RELATING TO THESE SECURITIES HAS NOT BEEN FILED WITH THE
SECURITIES AND EXCHANGE COMMISSION.
                                 ______________

     NEITHER THE  SECURITIES AND EXCHANGE  COMMISSION  NOR ANY STATE  REGULATORY
BODY HAS PASSED UPON THE VALUE OF THE SECURITIES, MADE ANY RECOMMENDATIONS AS TO
THEIR  PURCHASE,  APPROVED  OR  DISAPPROVED  THE  OFFERING,  OR PASSED  UPON THE
ADEQUACY OR ACCURACY OF THIS MEMORANDUM.  ANY  REPRESENTATION TO THE CONTRARY IS
UNLAWFUL.
                                 ______________

     THESE SECURITIES ARE SUBJECT TO RESTRICTIONS ON TRANSFERABILITY  AND RESALE
AND MAY NOT BE  TRANSFERRED  OR RESOLD EXCEPT AS PERMITTED  UNDER THE SECURITIES
ACT OF 1933, AS AMENDED, AND UNDER APPLICABLE STATE SECURITIES LAWS, PURSUANT TO
REGISTRATION  OR EXEMPTION  THEREFROM.  NO PUBLIC OR OTHER MARKET EXISTS OR WILL
DEVELOP  FOR THE UNITS.  UNITS ARE NOT  TRANSFERABLE  WITHOUT THE CONSENT OF THE
GENERAL  PARTNER AND  SATISFACTION  OF CERTAIN  OTHER  CONDITIONS  INCLUDING THE
AVAILABILITY  OF AN EXEMPTION  UNDER THE  SECURITIES  ACT OF 1933 AND APPLICABLE
STATE  SECURITIES  LAWS.  SEE  "RISK  FACTORS  -  LIMITED   TRANSFERABILITY  AND
ILLIQUIDITY OF UNITS." INVESTORS SHOULD PROCEED ONLY ON THE ASSUMPTION THAT THEY
MAY  HAVE  TO BEAR  THE  ECONOMIC  RISK OF AN  INVESTMENT  IN THE  UNITS  FOR AN
INDEFINITE PERIOD OF TIME.
                                 ______________



                                      -iv-
<PAGE>

     IN  MAKING  AN  INVESTMENT  DECISION,  INVESTORS  MUST  RELY ON  THEIR  OWN
EXAMINATION OF THE PERSON OR ENTITY CREATING THE SECURITIES AND THE TERMS OF THE
OFFERING,  INCLUDING THE MERITS AND RISKS  INVOLVED.  THESE  SECURITIES HAVE NOT
BEEN  RECOMMENDED  BY ANY FEDERAL OR STATE  SECURITIES  COMMISSION OR REGULATORY
AUTHORITY.  FURTHERMORE,  THE  FOREGOING  AUTHORITIES  HAVE  NOT  CONFIRMED  THE
ACCURACY OR DETERMINED THE ADEQUACY OF THIS DOCUMENT.  ANY REPRESENTATION TO THE
CONTRARY IS A CRIMINAL OFFENSE.
                                 ______________

     PROSPECTIVE  INVESTORS  SHOULD NOT CONSTRUE THE CONTENTS OF THIS MEMORANDUM
OR ANY PRIOR OR SUBSEQUENT  COMMUNICATIONS,  WHETHER  WRITTEN OR ORAL,  FROM THE
PARTNERSHIP,  ITS  GENERAL  PARTNER OR ANY OF ITS AGENTS OR  REPRESENTATIVES  AS
INVESTMENT,  TAX OR LEGAL ADVICE.  THIS MEMORANDUM AND THE APPENDICES HERETO, AS
WELL AS THE NATURE OF THE  INVESTMENT,  SHOULD BE REVIEWED  BY EACH  PROSPECTIVE
INVESTOR,  HIS INVESTMENT,  TAX OR OTHER ADVISORS,  AND HIS ACCOUNTANTS OR LEGAL
COUNSEL.
                                 ______________

     NO OFFERING  LITERATURE  OR  ADVERTISING  IN  WHATEVER  FORM WILL OR MAY BE
EMPLOYED  IN THE  OFFERING  OF  UNITS,  EXCEPT  FOR THIS  MEMORANDUM  (INCLUDING
AMENDMENTS AND SUPPLEMENTS,  IF ANY) AND DOCUMENTS  SUMMARIZED HEREIN. NO PERSON
IS  AUTHORIZED  TO GIVE  ANY  INFORMATION  OR TO  MAKE  ANY  REPRESENTATION  NOT
CONTAINED IN THIS MEMORANDUM OR IN THE APPENDICES HERETO, AND, IF GIVEN OR MADE,
SUCH OTHER INFORMATION OR REPRESENTATION MUST NOT BE RELIED UPON.
                                 ______________

     THE GENERAL  PARTNER WILL MAKE  AVAILABLE,  PRIOR TO THE  CLOSING,  TO EACH
PROSPECTIVE  INVESTOR OR HIS  REPRESENTATIVES,  OR BOTH, THE  OPPORTUNITY TO ASK
QUESTIONS OF, AND RECEIVE  ANSWERS FROM, THE GENERAL  PARTNER OR A PERSON ACTING
ON ITS  BEHALF  CONCERNING  THE  TERMS  AND  CONDITIONS  OF THIS  OFFERING,  THE
PARTNERSHIP,  THE GENERAL PARTNER OR ANY OTHER RELEVANT  MATTERS,  AND TO OBTAIN
ANY ADDITIONAL  INFORMATION,  TO THE EXTENT THAT THE GENERAL  PARTNER  POSSESSES
SUCH  INFORMATION  OR CAN  ACQUIRE IT WITHOUT  UNREASONABLE  EFFORT OR  EXPENSE,
NECESSARY TO VERIFY THE ACCURACY OF THE INFORMATION HEREIN SET FORTH, SUBJECT TO
CERTAIN  CONFIDENTIALITY  RESTRICTIONS CONTAINED IN VARIOUS CONTRACTS WITH THIRD
PARTIES.
                                 ______________


                                       -v-
<PAGE>

     THIS MEMORANDUM CONTAINS  SUMMARIES,  BELIEVED BY THE GENERAL PARTNER TO BE
ACCURATE, OF CERTAIN TERMS OF CERTAIN DOCUMENTS, BUT REFERENCE IS HEREBY MADE TO
THE ACTUAL DOCUMENTS, COPIES OF WHICH ACCOMPANY THIS MEMORANDUM OR ARE AVAILABLE
FROM THE  GENERAL  PARTNER  UPON  REQUEST,  SUBJECT TO  CERTAIN  CONFIDENTIALITY
RESTRICTIONS  CONTAINED  IN  VARIOUS  CONTRACTS  WITH  THIRD  PARTIES.  ALL SUCH
SUMMARIES ARE QUALIFIED IN THEIR ENTIRETY BY THIS REFERENCE.
                                 ______________

     THIS OFFER CAN BE WITHDRAWN AT ANY TIME BEFORE CLOSING AND IS  SPECIFICALLY
MADE  SUBJECT TO THE TERMS  DESCRIBED  IN THIS  MEMORANDUM.  SUBJECT TO SPECIFIC
RESTRICTIONS  PROVIDED  FOR HEREIN,  THE GENERAL  PARTNER  RESERVES THE RIGHT TO
REJECT ANY  SUBSCRIPTION  IN WHOLE OR IN PART OR TO ALLOT TO ANY  INVESTOR  LESS
THAN THE  NUMBER OF UNITS  SUBSCRIBED  FOR BY SUCH  INVESTOR.  SEE "TERMS OF THE
OFFERING."
                                 ______________

     THIS  MEMORANDUM  HAS BEEN  PREPARED  SOLELY FOR THE  BENEFIT OF  INVESTORS
INTERESTED IN THE PROPOSED  PRIVATE  PLACEMENT OF THE UNITS AND  CONSTITUTES  AN
OFFER ONLY IF THE NAME OF AN OFFEREE APPEARS IN THE  APPROPRIATE  SPACE PROVIDED
ON THE COVER PAGE HEREOF.  DISTRIBUTION  OF THIS  MEMORANDUM TO ANY PERSON OTHER
THAN SUCH OFFEREE AND THOSE PERSONS  RETAINED TO ADVISE HIM WITH RESPECT THERETO
IS UNAUTHORIZED,  AND ANY REPRODUCTION OF THIS MEMORANDUM,  IN WHOLE OR IN PART,
OR THE DIVULGENCE OF ANY OF ITS CONTENTS,  WITHOUT THE PRIOR WRITTEN  CONSENT OF
THE GENERAL PARTNER, IS PROHIBITED.  EACH OFFEREE, BY ACCEPTING DELIVERY OF THIS
MEMORANDUM,  AGREES TO RETURN IT AND ALL RELATED  APPENDICES AND OTHER DOCUMENTS
TO THE GENERAL  PARTNER,  1900 CHURCH STREET,  SUITE 101,  NASHVILLE,  TENNESSEE
37203.  IF THE  OFFEREE  DOES NOT INTEND TO  SUBSCRIBE  FOR THE  PURCHASE OF THE
UNITS, THE OFFEREE'S SUBSCRIPTION IS NOT ACCEPTED OR THE OFFER IS TERMINATED.
                                 ______________

     NEITHER THE DELIVERY OF THIS MEMORANDUM NOR ANY SALES MADE HEREUNDER SHALL,
UNDER ANY  CIRCUMSTANCES,  IMPLY THAT THERE HAS BEEN NO CHANGE IN THE AFFAIRS OF
THE PARTIES  DESCRIBED  HEREIN  SINCE THE DATE HEREOF,  OR THAT THE  INFORMATION
CONTAINED  HEREIN IS CORRECT  AS OF ANY TIME AFTER THE DATE OF THIS  MEMORANDUM.
THIS MEMORANDUM DOES NOT CONSTITUTE AN OFFER OR SOLICITATION IN ANY


                                      -vi-
<PAGE>

STATE TO ANY PERSON TO WHOM SUCH OFFER OR SOLICITATION WOULD BE UNLAWFUL.
                                 ______________

     THE  BUSINESS  OF THE  PARTNERSHIP  INVOLVES  CONFLICTS  OF  INTEREST.  SEE
"CONFLICTS OF INTEREST."
                                 ______________

     AFFILIATES  OF THE GENERAL  PARTNER  WILL  RECEIVE  FEES WHETHER OR NOT THE
PARTNERSHIP EARNS ANY INCOME. SEE "COMPENSATION AND REIMBURSEMENT TO THE GENERAL
PARTNER AND ITS AFFILIATES."
                                  ____________

     THE GENERAL  PARTNER  BELIEVES  THIS  OFFERING  IS AN  ECONOMIC  INVESTMENT
OPPORTUNITY;  THUS,  INVESTORS  SHOULD NOT PURCHASE UNITS IN ANTICIPATION OF TAX
BENEFITS.
                                 ______________
 



                                      -vii-
<PAGE>

                                TABLE OF CONTENTS
                                                                           Page

SUMMARY  .....................................................................1

RISK FACTORS..................................................................6
         Operating Risks......................................................6
         Tax Risks...........................................................12
         Other Investment Risks..............................................14

GLOSSARY ....................................................................17

TERMS OF THE OFFERING........................................................23
         General  ...........................................................23
         Limited Partner Loans...............................................25
         Offering Exemptions.................................................26
         Suitability Standards...............................................27
         How to Invest.......................................................28
         Restrictions on Transfer of Units...................................29

PLAN OF DISTRIBUTION.........................................................30

PROPOSED ACTIVITIES..........................................................31
         Purpose  ...........................................................31
         Treatment Methods For Kidney Stone Disease..........................31
         The Asset Contribution..............................................33
         History of the Business.............................................34
         Description of the Assets...........................................34
         Anticipated Partnership Expenditures................................36
         Operation of the Mobile Lithotripsy Systems.........................36
         Funding for Partnership Activities..................................37
         Acquisition of Additional Assets....................................38
         Management and Administration.......................................38
         Financial Projections...............................................40

FINANCIAL CONDITION OF THE BUSINESS..........................................41
         Selected Financial Data of the Business.............................41
         Management's Discussion and Analysis................................43

SOURCES AND APPLICATIONS OF FUNDS............................................45

COMPENSATION AND REIMBURSEMENT TO THE
         GENERAL PARTNER AND ITS AFFILIATES..................................46



                                     -viii-
<PAGE>

GENERAL PARTNER..............................................................48

MANAGEMENT AGENT.............................................................49

CONFLICTS OF INTEREST........................................................51

FIDUCIARY RESPONSIBILITY OF THE GENERAL PARTNER..............................53

COMPETITION..................................................................53

REGULATION...................................................................55
         State Regulation....................................................61

PRIOR ACTIVITIES.............................................................64

TAX ASPECTS OF THE OFFERING..................................................71
         Partnership Status..................................................72
         Effect of Classification as Corporation.............................73
         Partners, Not Partnership, Subject to Tax...........................73
         Affiliated Service Groups...........................................74
         Passive Income and Losses...........................................77
         Depreciation........................................................81
         Partnership Allocations.............................................81
         Tax Treatment Of Certain Fees and Expenses Paid By The Partnership..83
         Partnership Elections...............................................86
         Taxable Income......................................................86
         Cash Distributions and Determination of Basis.......................87
         Sale of Partnership Units...........................................88
         Further Changes in Tax Laws.........................................88
         Local and State Taxes...............................................88

SUMMARY OF THE PARTNERSHIP AGREEMENT.........................................88
         Formation...........................................................89
         Description of the Units............................................89
         Contribution of the General Partner.................................89
         Dilution Offerings..................................................89
         Fundamental Changes.................................................90
         Profits, Losses and Distributions...................................92
         Management of the Partnership.......................................95
         Powers of the General Partner.......................................95
         Rights and Liabilities of the Limited Partners......................96
         Restrictions on Transfer of Partnership Interests...................97
         Dissolution and Liquidation.........................................97
         Optional Purchase of Limited Partner Interests......................98


                                      -ix-
<PAGE>

         Arbitration.........................................................99
         Power of Attorney...................................................99
         Records  ..........................................................100

LEGAL MATTERS...............................................................100

ADDITIONAL INFORMATION......................................................100


                                   APPENDICES

Appendix A        FINANCIAL PROJECTIONS
Appendix B        AGREEMENT OF LIMITED PARTNERSHIP OF
                    TENNESSEE VALLEY LITHOTRIPTER LIMITED PARTNERSHIP
Appendix C        LOAN COMMITMENT
Appendix D        FORM OF MANAGEMENT AGREEMENT
Appendix E        FORM OF OPINION OF WOMBLE CARLYLE SANDRIDGE & RICE, A
                    PROFESSIONAL LIMITED LIABILITY COMPANY
Appendix F        FINANCIAL STATEMENTS



                                       -x-
<PAGE>

                                     SUMMARY

     This  summary of certain  provisions  of the  Memorandum  is intended for a
quick reference and is not complete. The Memorandum and accompanying  Appendices
must be read and understood in their  entirety by Investors.  See the "Glossary"
for terms used in this Memorandum and not otherwise defined.

     The Units and Subscription  Price.  Tennessee Valley  Lithotripter  Limited
Partnership,  a  limited  partnership  formed  under  the  laws of the  State of
Tennessee,  hereby  offers up to 80 Units of  limited  partner  interest  in the
Partnership.  Each Unit represents a 0.25% economic interest in the Partnership.
Investors should note that their initial Percentage Interests in the Partnership
may be reduced by future  Dilution  Offerings.  See "Summary of the  Partnership
Agreement  -  Dilution  Offerings"  and the  form of the  Partnership  Agreement
attached  hereto as Appendix B. The price for each Unit is $9,114 and is payable
in cash in full at subscription;  provided,  that prospective Investors who meet
certain  requirements may be able to fund a portion of their Unit purchase price
with the proceeds of certain third-party financing. The Partnership has arranged
for financing of a portion of the Units' purchase price with First-Citizens Bank
& Trust Company,  Fayetteville,  North Carolina (the "Bank"). Therefore, in lieu
of paying the entire purchase price in cash,  prospective  Investors may execute
and deliver to the Sales Agent upon delivery of their Subscription  Packets,  at
least $2,500 in cash and a Limited Partner Note in a maximum principal amount of
up to $6,614 per Unit to be purchased,  a Loan and Security Agreement,  Security
Agreement  and two  Uniform  Commercial  Code  Financing  Statements  ("UCC-1s")
(collectively,  the "Loan  Documents").  See  "Terms of the  Offering  - Limited
Partner Loans" and the forms of the Limited  Partner Note, the Loan and Security
Agreement and Security  Agreement attached to the Bank Commitment as Exhibits A,
B and C,  respectively,  which is  attached  hereto as  Appendix C and the UCC's
attached as part of the Subscription Packet. Each Investor may purchase not less
than one Unit. The General Partner may, in its sole discretion,  reject in whole
or in part any subscription. See "Terms of the Offering."

     The Offering. By this Offering the Partnership seeks to sell up to 80 Units
for up to $729,120 in cash ($709,120 net of Sales Agent's  commissions).  In the
event complete  subscriptions for one or more Units are received and accepted by
the General Partner,  all subscription  funds (plus interest) and Loan Documents
held in escrow will be  released to the  Partnership.  If no  subscriptions  are
received  and  accepted  by the end of the  subscription  period as  defined  in
"Subscription  Period"  below,  the  Offering  will be  terminated.  The General
Partner and its Affiliates do not intend to purchase Units in the Offering.  See
"Terms of the Offering - General."  All  subscription  funds and Loan  Documents
will be held in escrow by the Escrow Agent until the Closing or the  termination
of the Offering.

     Subscription  Period.  The  subscription  period will  commence on the date
hereof and will  terminate at 5:00 p.m.,  Central time on  December 4,  1998 (or
earlier, in the discretion of the General Partner, upon the sale of all 80 Units
as provided  herein),  unless sooner terminated by the General Partner or unless
extended for an additional  period up to 180 days.  See "Terms of the Offering -
General - Subscription Period."



                                       -1-
<PAGE>

     Anticipated   Benefits  to  Investors.   The  primary   objectives  of  the
Partnership are (i) to improve the provision of health-care in the Partnership's
Service Area by taking advantage of the  technological  innovations  inherent in
its Mobile  Lithotripsy  Systems and the  Partnership's  quality  assurance  and
outcome analysis  programs,  and (ii) to make cash Distributions to its Partners
from revenues  generated from the operation of the Mobile  Lithotripsy  Systems.
Each Unit represents an initial 0.25% interest in Partnership  income,  loss and
cash  Distributions.  It is  anticipated  that cash  Distributions  will be made
quarterly  following the Closing.  There is no assurance that the  Partnership's
cash  Distribution  objective  can be met. See "Proposed  Activities"  and "Risk
Factors." The General Partner represents that Investors should not invest in the
Partnership for purposes of obtaining deductions,  losses or other tax benefits,
because it is  anticipated  by the General  Partner that taxable  income will be
reportable   by  the  Limited   Partners   along  with  their  receipt  of  cash
Distributions.  To the extent  available,  the General Partner will use its best
efforts to distribute  cash from  operations to enable the Partners to pay their
income tax liabilities on their respective shares of Partnership taxable income.

     The Partnership's projected statements of taxable income (loss), cash flow,
sources and uses of funds and projected  statements of return per Unit,  are set
forth in Appendix A hereto.  The Financial  Projections are based on assumptions
set forth therein and in this  Memorandum  and are included for the  information
and convenience of Investors and their professional advisors. THE PROJECTED DATA
ARE THE GENERAL PARTNER'S  ESTIMATE OF REASONABLE,  BUT NOT NECESSARILY THE MOST
LIKELY,  RESULTS OF THE  PARTNERSHIP'S  OPERATIONS AND REPRESENT A PREDICTION OF
FUTURE EVENTS BASED ON ASSUMPTIONS  THAT MAY OR MAY NOT OCCUR, AND SHOULD NOT BE
RELIED UPON TO INDICATE THE ACTUAL  RESULTS THAT WILL BE OBTAINED.  Further,  no
assurance can be given that the  financial  results of the  Partnership  will be
comparable to the  historical  financial  results of the Business as operated by
the General Partner and the differences could be materially  adverse.  See "Risk
Factors - Other Investment Risks- Financial Projections."

     Proposed  Activities.  It is anticipated  that the Partnership will operate
the  Business  in a manner  similar  to the  manner  in  which  it is  presently
conducted by the General  Partner.  The Partnership will use the proceeds of the
Offering,  to the extent funds are available,  to (i) recondition three trailers
(estimated  at $65,000  each),  and (ii)  purchase  three used  tractors  (up to
$40,000  each).  Offering  proceeds  will also be used to fund  syndication  and
working  capital  costs  and  other  Partnership  expenses.   See  "Sources  and
Application   of  Funds"   and   "Proposed   Activities   -  Other   Partnership
Expenditures."  See also "Risk Factors - Operating  Risks - Partnership  Limited
Resources and Risks of Leverage," "Compensation and Reimbursement to the General
Partner and its  Affiliates"  and the Financial  Projections  attached hereto as
Appendix A.

     The Partnership is a party to an agreement (the  "Contribution  Agreement")
which provides that the General Partner will contribute substantially all of the
assets,  including  five  Mobile  Lithotripter  Systems,  and rights and certain
contractual  obligations under  approximately 30 lithotripsy  services contracts
(the  "Hospital   Contracts"),   related  to  its  lithotripsy  operations  (the
"Business")  to the  Partnership in exchange for at least an 80% interest in the
Partnership (the "Asset Contribution").  The Partnership Interest of the General
Partner will increase 0.25% per unsold Unit.


                                       -2-
<PAGE>

Consummation of the Asset  Contribution is conditioned on the successful Closing
of the Offering and the receipt of certain consents and releases.  See "Proposed
Activities  - The Asset  Contribution."  The  Partnership  will have no separate
operations prior to the Closing and plans thereafter to operate the Business.

     In connection with the Asset Contribution,  the Partnership will succeed to
the rights and  obligations of the General  Partner with respect to the Hospital
Contracts.  While many of the Hospital Contracts are terminable without cause by
either  party  on short  notice,  the  General  Partner  believes  it has a good
relationship  with  many of the  contracting  parties  and does  not  anticipate
significant  cancellations.  There is no assurance,  however, that cancellations
will either not occur or that the resulting impact to the Partnership  would not
be materially  adverse.  See " Risk Factors -  Operating Risks - Contract Terms
and Termination." The Hospital Contracts  generally provide for the provision of
services which are "wholesale" in nature,  i.e. the  Partnership  will primarily
supply the lithotripter,  certain  personnel and maintenance  services for a per
procedure  fee.  Generally,  the  hospitals  and  outpatient  centers are solely
responsible  for billing and  collection,  on their own  behalf,  the  technical
component of the  lithotripsy  procedure.  In addition to the existing  Hospital
Contracts,  the General Partner intends to pursue additional lithotripsy service
opportunities   throughout  the  Service  Area.  The  travel  schedule  for  the
Partnership's  Mobile  Lithotripsy  Systems is expected to be  influenced by the
number  of  treating  physicians  and  patients  in  particular  areas  and  the
Partnership's arrangements with various hospitals and outpatient surgery centers
located throughout the Service Area, including existing scheduling  arrangements
under the  Hospital  Contracts.  See  "Proposed  Activities  - Operation  of the
Business."

     The  Partnership  will  enter  into a separate  Management  Agreement  with
Lithotripters,  Inc., a North Carolina  corporation and Affiliate of the General
Partner (the  "Management  Agent").  Pursuant to the Management  Agreement,  the
Management  Agent  generally  will  (i) manage  all  operations  of  the  Mobile
Lithotripsy  Systems and (ii) conduct  quality  assurance  and outcome  analysis
programs.  See  "Proposed  Activities  -  Operation  of the  Mobile  Lithotripsy
Systems" and the form of the Management Agreement attached hereto as Appendix D.

     Qualified  physicians  desiring to treat  patients  with the  Lithotripters
typically will make appropriate  arrangements  with the hospitals and outpatient
surgery centers serviced by the Partnership.  See "Tax Aspects of the Offering -
Affiliated  Service  Groups" and "Proposed  Activities - Operation of the Mobile
Lithotripsy  Systems."  Generally,  all qualified  physicians  desiring to treat
their own  patients on a  lithotripter  may do so after they have  received  the
necessary  training as  prescribed  by the rules of the  applicable  hospital or
outpatient  surgery center. In addition,  the General Partner reserves the right
to request  physicians (or members of their practice  group) to treat only their
own  patients  with a  lithotripter  if it  determines  that  such  practice  is
advisable  under  applicable  law.  See  "Regulation."  The  treating  qualified
physicians  will be solely  responsible  for billing and collecting on their own
behalf the professional component of the lithotripsy procedure.

     In the event the General Partner determines in the future that it is in the
best interest of the  Partnership,  it may cause the  Partnership (i) to acquire
one or more additional fixed base or mobile  lithotripter  systems (or any other
renal stone treatment equipment) for the treatment of renal


                                       -3-

<PAGE>


stones in such  location(s) as the General  Partner may  determine,  in its sole
discretion,  to be in the best interests of the Partnership;  (ii) to acquire an
interest  in any  business  entity,  including,  without  limitation,  a limited
partnership,  limited liability company or corporation, that engages in any such
business activity;  and (iii) to engage in any and all activities  incidental or
related to the foregoing (including without limitation bilary lithotripsy if the
same is ever approved by the FDA),  upon and subject to the terms and conditions
of the  Partnership  Agreement;  and/or (iv) to engage in Dilution  Offerings on
behalf of the  Partnership  to accomplish  such goals,  and may use  Partnership
assets and revenues to secure and repay such borrowings.

     Organization of the  Partnership.  Tennessee  Valley  Lithotripter  Limited
Partnership, a Tennessee limited partnership (the "Partnership"),  was organized
and created under the Act on October 16, 1998. The Asset Contribution will occur
upon  the  successful  Closing  of the  Offering.  The  general  partner  of the
Partnership  is Prime  Lithotripter  Operations,  Inc., a Delaware  corporation,
d/b/a  Tennessee  Valley  Lithotripter,  and  wholly-owned  subsidiary  of Prime
Medical Services, Inc. See "The General Partner." Upon consummation of the Asset
Contribution,  the General  Partner will acquire at least an 80% interest in the
Partnership.  The  Partnership  Interest of the General Partner will increase by
0.25%  for  each  unsold  Unit.  The  address  of the  principal  office  of the
Partnership is 1900 Church Street,  Suite 101,  Nashville,  Tennessee 37203. The
Partnership  will contract with the Management  Agent pursuant to the Management
Agreement to manage the Partnership's day-to-day business operations.  Following
the Asset  Contribution,  the Partnership  will operate five Mobile  Lithotripsy
Systems  throughout the Service Area. See the form of the Partnership  Agreement
attached as Appendix B and "Summary of the Partnership Agreement" below.

     Limited  Liability.  Other than the purchase  price for a Unit,  no capital
assessments will be requested of or imposed on the Limited Partners.  Provided a
Limited  Partner  does not  participate  in the  management  or  control  of the
Partnership,  he will not incur any liability with respect to obligations of the
Partnership,  except to the  extent of his (i)  capital  contributions  and (ii)
obligation to return certain  Distributions made to him constituting a return of
capital  contributions  in accordance  with the Act. See "Risk  Factors -  Other
Investment   Risks -   Limited   Partners'    Obligation   to   Return   Certain
Distributions."  See also,  the form of Opinion of Womble  Carlyle  Sandridge  &
Rice, a Professional  Limited  Liability  Company attached hereto as Appendix E.
Investors funding their Unit purchase price with the proceeds of a loan from the
Bank will be  personally  liable to the Bank as provided in the Loan  Documents.
See "Terms of the Offering - Limited Partner Loans."

     Optional  Purchase of Limited  Partner  Interests.  Upon the  occurrence of
certain  events with  respect to a Limited  Partner,  such as (i) death,  (ii) a
domestic proceeding, (iii) insolvency or (iv) direct or indirect ownership of an
interest in a competing  venture  (including  the lease or sublease of competing
technology),  the  Partnership  Interest  of such  Limited  Partner  may, in the
discretion of the General Partner,  be sold. In addition,  in the event existing
or newly enacted laws or regulations or any other legal  developments  adversely
affect (or potentially adversely affect) the operation of the Partnership or the
business of the  Partnership  (e.g. any  prohibitions  on provider  ownership or
exclusions from public insurance programs),  the General Partner is obligated to
either


                                       -4-
<PAGE>

purchase the  Partnership  Interests of all of the Limited  Partners or dissolve
the Partnership.  The purchase price in the case of any forced  divestiture of a
Limited Partner  Partnership  Interest is likely to be nominal.  See "Summary of
the Partnership Agreement - Optional Purchase of Limited Partner Interests."

     Investment  of the General  Partner.  The General  Partner will acquire its
entire  general  partner  Partnership  interest (80% assuming the sale of all 80
Units) upon consummation of the Asset Contribution.  The General Partner will be
responsible  for the  operation of the  Partnership  and intends to delegate the
day-to-day  management  of  the  Partnership's  lithotripsy  operations  to  the
Management  Agent. See "General  Partner" and "Proposed  Activities - Management
and Administration."

     Compensation  and  Reimbursement of the General Partner and its Affiliates.
The  Management  Agent,  an  Affiliate  of the General  Partner,  will receive a
monthly  management  fee equal to the  greater of $8,000 or 7.5% of  Partnership
Cash Flow per month pursuant to the Management  Agreement.  The General  Partner
and its  Affiliates  will receive  interest on loans,  if any,  they make to the
Partnership.  In addition, the Partnership may contract with the General Partner
or  its  Affiliates  to  render  other  services  or  provide  materials  to the
Partnership  provided that the  compensation  is at the then prevailing rate for
the type of services and/or  materials  provided.  The Management  Agent and the
General Partner are also entitled to reimbursement  from the Partnership for all
costs  incurred  by  them in  managing  the  Partnership.  Upon  the  successful
completion  of this  Offering,  the Sales  Agent,  an  Affiliate  of the General
Partner,  will receive up to $20,000 in sales  commissions  from the Partnership
for the sale of Units and may be reimbursed  for up to $15,000 in  out-of-pocket
offering  expenses.  The General Partner intends to cause the Partnership to pay
AK  Associates,  an Affiliate of the General  Partner,  an aggregate of $195,000
from the proceeds of this Offering to refurbish  three  trailers and to contract
in the future with AK Associates for similar services. In addition,  the General
Partner   anticipates   causing  the  Partnership  to  rent  "loaner"   trailer-
lithotripter  units from  Affiliates of the General Partner at a cost of $35,000
per month per unit while the Partnership's  trailers are being refurbished.  The
General  Partner and its  Affiliates  will receive no  development  fee or other
compensation  for  organizing or operating the  Partnership  except as otherwise
provided  herein.  See "Proposed  Activities - Management  and  Administration,"
"Proposed   Activities -   Funding  for   Partnership   Activities,"   "Plan  of
Distribution,"  "Compensation  and  Reimbursement to the General Partner and its
Affiliates" and "Conflicts of Interest."

     Plan of Distribution.  Subscriptions for Units will be solicited on a "best
efforts" any or all basis by the Sales Agent. Upon the successful  completion of
this Offering,  the  Partnership  will pay the Sales Agent a $250 commission for
each Unit sold and will reimburse the Sales Agent for out-of-pocket expenditures
incurred in connection with this Offering (not to exceed $15,000).  See "Plan of
Distribution" and "Conflicts of Interest."



                                       -5-
<PAGE>

     Eligible  Investors.  Generally,  this  offer  is made  only  to  qualified
investors acceptable to the General Partner and, if applicable,  approved by the
Bank for  purposes of the Limited  Partner  Loans.  See "Terms of the Offering -
Suitability Standards" and "Limited Partner Loans."

                                  RISK FACTORS

     Prior to subscribing for Units,  Investors  should  carefully  examine this
entire  Memorandum,  including the Appendices hereto, and should give particular
consideration  to the general risks  attendant to  speculative  investments  and
investments in partnerships generally,  and to the other special operating,  tax
and other investment risks set forth below.

Operating Risks

     Lack of Operating History; General Risks of Operations. The Partnership was
formed  under the laws of the State of  Tennessee  on  October  16,  1998 and is
expected to have no  operations  prior to the Asset  Contribution.  Although the
General  Partner,  the Management  Agent and their  personnel  have  significant
experience in managing  lithotripsy  enterprises,  whether the  Partnership  can
effectively operate and expand the Business cannot be accurately predicted.  The
benefits of an  investment in the  Partnership  also depend on many factors over
which the  Partnership  has no  control,  including  competition,  technological
innovations  rendering  the  Mobile  Lithotripsy  Systems  less  competitive  or
obsolete,  and other  matters.  The  Partnership  may be  adversely  affected by
various  changing  local  factors such as an increase in local  unemployment,  a
change  in  general   economic   conditions,   changes  in  interest  rates  and
availability  of  financing,  and other matters that may render the operation of
its Mobile Lithotripsy Systems difficult or unattractive. Other factors that may
adversely affect the operation of its Mobile Lithotripsy  Systems are unforeseen
increased operating expenses,  energy shortages and costs attributable  thereto,
uninsured losses and the capabilities of the Partnership's management personnel.

     Uncertainties  Related to Changing Healthcare  Environment.  The healthcare
industry has experienced  substantial changes in recent years.  Although managed
care has yet to become a major factor in the delivery of  lithotripsy  services,
the General Partner anticipates that managed care programs, including capitation
plans,  may play an increasing role in the delivery of lithotripsy  services and
that  competition for these services may shift from individual  practitioners to
health  maintenance  organizations  and other  significant  providers of managed
care. No assurance can be given that the changing  healthcare  environment  will
not have a material adverse effect on the Partnership.

     Lack of  Diversification.  The Partnership's  fundamental purpose following
the Asset  Contribution  will be to  operate  the  Mobile  Lithotripsy  Systems.
Because the Partnership is dependent on only one line of business,  it will have
greater  risks from  unexpected  service  interruptions,  equipment  breakdowns,
technological  developments,   kidney  stone  treatment  medical  breakthroughs,
economic  problems  and  similar  matters  than  would be the  case  with a more
diversified business.


                                       -6-
<PAGE>

     Impact of Insurance Reimbursement.  The Partnership's revenues are expected
to be derived from the equipment rental fees paid by the Contract Hospitals. The
Partnership  will not directly  bill and collect for services  from  patients or
their third-party payors.  Rental rates received from contracting  hospitals may
be subject to  renegotiation  depending  on the  reimbursement  received  by the
Contract  Hospitals.  Such  reimbursement  may be  reduced  as a  result  of the
introduction  of an outpatient  prospective  payment system  regarding  Medicare
patients,  which in turn could lower reimbursement available from private health
insurers.   The  Partnership's   revenues  could  be  adversely  affected.   See
"Regulation."  These  developments  could  have an  adverse  impact on  proposed
Partnership operations.

     Reliability  and  Efficacy  of  the   Partnership's   Lithotripters.   Upon
consummation of the Asset  Contribution,  the Partnership  will own five Dornier
HM3   lithotripters.   The  HM3  has  a  United  States  operating   history  of
approximately  14 years. The General Partner has experience with the HM3, and in
the General Partner's opinion,  the HM3 has proven to be reliable and dependable
medical  equipment.  The  General  Partner  estimates  that  the HM3 has a 7-10%
overall retreatment rate.  Investors should note that some studies indicate that
lithotripsy may cause high blood pressure and tissue damage. The General Partner
questions the reliability of these studies and believes lithotripsy has become a
widely  accepted  method for the  treatment of renal  stones.  Also,  "downtime"
periods   necessitated  by  maintenance  and  repairs  of  one  or  more  Mobile
Lithotripsy   Systems  will  adversely  effect  Partnership   revenues.   It  is
anticipated that, subject to availability, the General Partner or its Affiliates
will  rent the  Partnership  one of its  mobile  lithotripters  in the  event of
substantial  downtime  problems.  See  "Compensation  and  Reimbursement  to the
General Partner and Its Affiliates."

     Technological Obsolescence.  The history of lithotripsy of kidney stones as
an accepted treatment  procedure is relatively  recent,  with the first clinical
trials being conducted in West Germany beginning in 1980 and the first premarket
approval for a renal  lithotripter in the United States being granted by the FDA
in December 1984.  Today,  lithotripsy is the treatment  procedure of choice for
kidney stone disease, having replaced other treatment methods. Published reports
indicate that certain  researchers are attempting to improve a laser  technology
to more  easily  eradicate  kidney  stones,  and  pharmaceutical  companies  and
researchers  have  attempted to develop a safe drug that can be used to dissolve
kidney stones in all cases.  The General  Partner  cannot predict the outcome of
ongoing research in these areas, and any one or more  developments  could reduce
or eliminate  lithotripsy  as an  acceptable  procedure  or treatment  method of
choice for the treatment of kidney stones.

     Partnership  Limited Resources and Risks of Leverage.  The proceeds of this
Offering cannot be accurately  determined until the Closing has occurred and the
number of Units sold has been calculated.  In the event such proceeds are not be
sufficient  to fund all  anticipated  expenses,  it may be necessary in order to
meet current or projected  expenses,  to supplement  Partnership  funds with the
proceeds  of debt  financing.  See  "Proposed  Activities  -  Other  Partnership
Expenditures," " Proposed  Activities - Funding for Partnership  Activities" and
"Sources and Application of Funds." Although the General Partner  maintains good
relationships with certain commercial lending institutions,  it has not obtained
a loan commitment from any party in any


                                       -7-
<PAGE>

amount on behalf of the  Partnership and whether one would timely be forthcoming
on terms  acceptable to the Partnership  cannot be assured.  The General Partner
and/or its  Affiliates  may, but are under no  obligation  to, make loans to the
Partnership,  and there is no assurance that they would be willing or able to do
so at the time, in amounts and on terms required by the  Partnership.  While the
General Partner does not anticipate that it would cause the Partnership to incur
indebtedness unless cash generated from Partnership  operations were at the time
expected to enable  repayment of such loan in accordance  with its terms,  lower
than anticipated  revenues and/or greater than anticipated expenses could result
in the Partnership's  failure to make payments of principal or interest when due
under such a loan and the Partnership's  equity being reduced or eliminated.  In
such  event,  the  Limited  Partners  could lose their  entire  investment.  See
"Proposed  Activities - Funding For  Partnership  Activities"  and the Financial
Projections attached to this Memorandum as Appendix A.

     Acquisition  of  Additional  Assets.  If in the future the General  Partner
determines  that it is in the best interest of the Partnership to acquire one or
more additional  fixed base or Mobile  Lithotripter  Systems (or any other renal
stone  treatment  equipment)  for the  treatment  of renal  stones,  the General
Partner has the authority  (without  obtaining the Limited Partners' consent) to
establish  reserves or borrow  additional  funds on behalf of the Partnership to
accomplish such goals, and may use Partnership assets and revenues to secure and
repay such borrowings.  The acquisition of additional  assets may  substantially
increase the Partnership's  monthly  obligations and result in greater personnel
requirements.  See  "Risk  Factors  -  Operating  Risks  -  Partnership  Limited
Resources  and Risks of  Leverage."  The  General  Partner  does not  anticipate
acquiring additional  Partnership assets unless projected  Partnership Cash Flow
or  proceeds   from  a  Dilution   Offering  are   sufficient  to  finance  such
acquisitions. In any event, no Limited Partner would be personally liable on any
additional  Partnership   indebtedness  without  such  Partner's  prior  written
consent.  There  is no  assurance  that  financing  would  be  available  to the
Partnership  to  acquire  additional  assets or to fund any  additional  working
capital  requirements.  Any such  borrowing  by the  Partnership  will  serve to
increase  the risks to the  Partnership  associated  with  leverage  as provided
above.

     Competition.   Many  competing  fixed-site  and  mobile  lithotripters  are
currently  operating in and around the Service Area in direct  competition  with
the  Business.  The  competing  lithotripsy  service  providers  generally  have
existing  contracts with hospitals and other  facilities.  There is no assurance
that  other  parties  will not,  in the  future,  operate  fixed-site  or mobile
lithotripters  in and around the Service  Area.  The  ability of certain  former
owners of the  Business to compete  with the General  Partners  had been limited
under noncompetition agreements which only recently expired. Whether and to what
extent any of such  persons may elect to compete  with the  Partnership  and the
resulting  impact  on  proposed  Partnership  operations  cannot  be  accurately
predicted  by the General  Partner.  See  "Proposed  Activities - History of the
Business." To the General Partner's  knowledge,  no manufacturers are restricted
from  selling  their  lithotripters  to other  parties in the Service  Area.  In
addition, except as provided by law, none of the General Partner, the Management
Agent or  their  respective  Affiliates  are  prohibited  from  engaging  in any
business or  arrangement  that may compete with the  Partnership.  Four ventures
affiliated with the General Partner either currently  provide or are planning to
provide lithotripsy services in or near the Service Area. See "Prior Activities"
and "Competition." Affiliates of the General Partner are planning and


                                       -8-
<PAGE>

conducting  other joint venture  offerings that would operate  lithotripters  in
other states. In addition, the Partnership will be competing with facilities and
individual  medical  practitioners  who  offer  conventional   treatment  (e.g.,
surgery) for kidney stones.  In order to be  successful,  the  Partnership  must
convince  physicians  and potential  patients of the quality of the treatment it
can provide,  its reasonable  equipment  rental charges,  the superiority of its
lithotripters  to other  lithotripters  and the advantages of  lithotripsy  over
conventional  surgery and other treatment  methods.  The  Partnership  Agreement
severely  restricts  the ability of the Limited  Partners  to own  interests  in
competing  equipment or ventures.  The  enforceability  of these  noncompetition
agreements is generally a matter of state law and is evolving  over time.  There
is no assurance that one or more Limited Partners may not  successfully  compete
with the Partnership.  See "Proposed  Activities - Treatment  Methods for Kidney
Stone Disease" and "Competition."

     Government  Regulation.  All facets of the  healthcare  industry are highly
regulated and will become more so in the future.  The ability of the Partnership
to operate  legally and be  profitable  may be adversely  affected by changes in
governmental regulations, including expected changes in reimbursement,  Medicare
and Medicaid certification regulations,  federal and state fraud and abuse laws,
including  the Federal  Anti-kickback  Statute,  the Federal  False  Claims Act,
federal and state  self-referral  laws, state  restrictions on fee splitting and
other governmental regulation.  See "Regulation." These laws and regulations may
adversely  affect the economic  viability of the Partnership and may subject the
General  Partner  and all  Limited  Partners  to  governmental  scrutiny  and/or
prosecution  for felony  charges and  punishment  in the form of large  monetary
fines, loss of licensure, imprisonment and exclusion from Medicare and Medicaid.
Recent changes in Medicare and Medicaid law have limited provider  ownership and
control  over the various  health care  services  to which  physicians  may make
Medicare and Medicaid  referrals.  The primary laws  involved are the "Stark II"
federal  statute  prohibiting  financial  relationships  between  physicians and
certain  entities to which they refer patients,  and the  Anti-Kickback  Statute
which prohibits compensation in exchange for or to induce referrals.

     Regarding   Stark  II,  in  January,   1998,   the  Health  Care  Financing
Administration  ("HCFA"),  the federal agency  responsible for administering the
Medicare  program,   published  proposed  Stark II  regulations.   The  proposed
regulations  outline  the  requirements  that must be met for the  Partnership's
proposed  operations to comply with Stark II. If HCFA adopts the proposed  Stark
II regulations as final,  or if a reviewing court were to interpret the Stark II
statute using the proposed regulations as guidance, then the Partnership and its
physician  Limited  Partners  may be in  violation  of Stark  II,  as all of the
proposed  regulations'  requirements may not be currently met. In such instance,
the Partnership  and/or its physician Limited Partners may be required to refund
any amounts  collected  from Medicare and Medicaid  patients in violation of the
statute,  and they may be subject to civil monetary  penalties  and/or exclusion
from the Medicare and Medicaid  programs.  The  Partnership's  arrangements with
contracting  hospitals to serve as an equipment  vendor have to be restricted to
comply with Stark II.  However,  there is no assurance  that such  restructuring
could be accomplished on terms acceptable to the Partnership.

     The Anti-Kickback Statute prohibits paying or receiving any remuneration in
exchange for making a referral for healthcare  services which may be paid for by
Medicare, Medicaid


                                       -9-
<PAGE>

or CHAMPUS.  The law has been broadly  interpreted to include any payments which
may induce or  influence  a  physician  to refer  patients.  One of the  federal
agencies  that  enforces the Anti-  Kickback  Statute has issued  several  "safe
harbors" which, if complied with, mean the payment or transaction will be deemed
not to violate the law. To the knowledge of the General  Partner,  this Offering
does not comply with any "safe harbor." There is limited guidance from reviewing
courts  regarding the  application  of the broad  language of the  Anti-Kickback
Statute to joint  ventures  similar to the one  described in this  Offering.  In
order  to  prove  violations  of the  Anti-Kickback  law,  the  government  must
establish that one or more parties  offered,  solicited or paid  remuneration to
induce or reward referrals.  The government has said that in certain  situations
the mere  offering of an  opportunity  to invest in a venture  would  constitute
illegal  remuneration in violation of the Anti- Kickback  Statute.  Although the
General  Partner  believes the structure and purpose of the  Partnership  are in
compliance  with the  Anti-Kickback  Statute,  no  assurances  can be given that
government  officials  or a  reviewing  court  would  agree.  Violation  of  the
Anti-Kickback Statute could subject the Partnership, the General Partner and the
physician  Limited Partners to criminal  penalties,  fines and/or exclusion from
the Medicare and Medicaid programs.

     In  addition  to  the  Stark  II and  Anti-Kickback  laws,  an  unfavorable
interpretation   of  other  existing  laws,  or  enactment  of  future  laws  or
regulations,   could   potentially   adversely   affect  the  operation  of  the
Partnership. If this occurs, the General Partner is obligated either to purchase
or cause the sale of the Partnership Interests of all of the Limited Partners or
to  dissolve  the  Partnership.  See  "Summary  of the  Partnership  Agreement -
Optional Purchase of Membership Interests."

     State  laws  will  affect  the  operation  of  the   Partnership  as  well.
Certificates of Need ("CONs") are ordinarily  required to acquire  lithotripters
or initiate lithotripsy services in Tennessee, Alabama and Kentucky. The General
Partner  already has the necessary  CONs for the Mobile  Lithotripsy  Systems in
Alabama and  Kentucky.  In order to transfer  the CONs to the  Partnership,  the
General  Partner  must provide  written  notice to the  respective  CON agencies
thirty (30) days before consummating the transaction.  The General Partner's CON
is currently  subject to challenge by another  potential  lithotripsy  equipment
vendor in Alabama;  the  General  Partner  believes  the  challenge  will not be
successful.  The General Partner does not hold CONs for lithotripsy  services in
Tennessee;  rather,  they  are  held by the  individual  contracting  hospitals.
Arkansas  does  not  require  a CON  for the  acquisition  of  lithotripters  or
initiation  of  lithotripsy   services.   Various   licensure  and  registration
requirements  must be met for the  Partnership  to  provide  mobile  lithotripsy
services in Tennessee,  Alabama,  Arkansas and Kentucky.  The  Partnership  will
comply with such  requirements.  Physicians  licensed in Tennessee  and Kentucky
must treat their own patients on the Mobile Lithotripsy Systems. See "Regulation
- - - State Regulation."

     Contract Terms and  Termination.  Pursuant to the  Contribution  Agreement,
concurrent with the Closing of the Offering,  the General Partner will assign to
the Partnership all its rights and obligations  under  approximately 30 Hospital
Contracts.  With one  exception,  none of the  Hospital  Contracts  requires the
consent of the Contract  Hospital prior to such assignment.  The General Partner
does not intend to obtain any  consents,  and there is no assurance  that one or
more Contract  Hospitals will not react  unfavorably to such assignment and seek
to terminate.  Many of the Hospital  Contracts are  terminable  without cause by
either party on short notice. Four hospitals


                                      -10-
<PAGE>

have terminated  lithotripsy services agreements with the General Partner within
the last year.  See "Proposed  Activities - Operation of the Business - Hospital
Contracts."  The General Partner does not anticipate  significant  cancellations
and believes it has a good  relationship  with many of the contracting  parties.
There is no assurance, however, that cancellations will either not occur or that
the resulting impact to the Partnership would not have a material adverse effect
on  Partnership  operations.  It is expected that most new  lithotripsy  service
contracts would have one-year terms and be  automatically  renewed unless either
party  elects to cancel prior to the end of the term.  In addition,  many of the
existing contracts have, and any new contracts are expected to have, a provision
permitting  termination in the event certain laws or regulations  are enacted or
applied to the  contracting  parties'  business  arrangements in a manner deemed
materially detrimental to either party. See "Government Regulation" above. Thus,
there is no assurance that Partnership operations as planned on the date of this
Memorandum will occur as herein  described or contemplated  and the cancellation
of a significant  number of service contracts or the Partnership's  inability to
secure new ones could have a material negative impact on the financial condition
and results of the Partnership.  In addition,  competing  vendors may attempt to
cause  certain  Contract   Hospitals  to  contract  with  them  instead  of  the
Partnership. The loss of Contract Hospitals to competition will adversely affect
Partnership  revenues  and such effect could be  material.  See "Risk  Factors -
Competition."

     Loss on Dissolution and  Termination.  Upon the dissolution and termination
of the Partnership, the proceeds realized from the liquidation of its assets, if
any, will be distributed to its partners only after  satisfaction  of the claims
of all creditors.  Accordingly,  the ability of a Limited Partner to recover all
or any portion of his  investment  under such  circumstances  will depend on the
amount of funds so  realized  and the  claims  to be  satisfied  therefrom.  See
"Summary of the  Partnership  Agreement - Optional  Purchase of Limited  Partner
Interests."

     Year 2000 Compliance. The now familiar "Year 2000 Issue" arose because many
existing  computer  programs  use only the last two  digits  to refer to a year.
Therefore,  such computer programs do not properly  recognize a year that begins
with "20" instead of "19." If not corrected,  many computer  applications  could
fail or create erroneous results on January 1, 2000. The extent of the potential
impact of the Year 2000 Issue is not yet known, and if not timely corrected,  it
could affect the global  economy.  The General Partner has made an assessment of
the Partnership's Year 2000 Issue risks and has concluded that the risks include
the following:  (i) operation of the Mobile Lithotripsy Systems may be adversely
affected;  (ii) third party payors may be adversely affected resulting in delays
in payment to the Partnership; (iii) facilities served by the Mobile Lithotripsy
Systems may be  adversely  affected  resulting  in a cessation of service to the
affected  facilities;  and (iv) the Partnership's  internal information systems,
including its accounting  system,  may be adversely affected resulting in record
keeping  and  accounting   delays.   Dornier,   the   manufacturer  of  the  HM3
lithotripter, has not assured Prime that its HM3 lithotripters will be Year 2000
compliant,  in all necessary respects,  i.e., that they will continue to operate
normally  after  January 1,  2000.  The  General  Partner  cannot  predict  with
certainty  whether  such will be the case or the effects of  noncompliance.  The
General  Partner has not inquired as to the Year 2000  readiness of any Contract
Hospital,  vendor or other third party related to the operation of the Business,
but is  relying  that such  parties  will be Year 2000  compliant.  The  General
Partner anticipates that the internal information systems,  including accounting
systems, that it will use for Partnership purposes will be Year 2000


                                      -11-
<PAGE>

compliant by the end of 1999,  although no assurance can be given that such will
be the case. The  Partnership  currently has no  contingency  plans in the event
that any of the above-described  risks is realized. In the event that any of the
above-described risks are realized, or any other,  unanticipated Year 2000 Issue
problems arise,  the Partnership  could be forced to cease its operations for an
indefinite  period of time while the Year 2000 problems are remedied,  at a cost
which cannot be  accurately  predicted at this time.  Any such  interruption  in
Partnership operations would adversely affect Partnership revenues.

Tax Risks

     Investors  should note that the General Partner  anticipates no significant
tax benefits  associated with the operation of the Mobile Lithotripsy Systems or
the Partnership.  No ruling will be sought from the Service on the United States
federal  income  tax  consequences  of any  of the  matters  discussed  in  this
Memorandum  or any other tax issues  affecting  the  Partnership  or the Limited
Partners. The Partnership is relying upon an opinion of its Counsel with respect
to certain material United States federal income tax issues.  Counsel's  opinion
is not  binding on the  Service as to any issue,  and there can be no  assurance
that any deductions,  or the period in which deductions may be claimed, will not
be  challenged  by the  Service.  Each  Investor  should  carefully  review  the
following  risk  factors and consult  his own tax  advisor  with  respect to the
federal,  state  and local  income  tax  consequences  of an  investment  in the
Partnership.

     THE  TAX  RISKS  SET  FORTH  IN THIS  SECTION  ARE  NOT  INTENDED  TO BE AN
EXHAUSTIVE LIST OF THE GENERAL OR SPECIFIC TAX RISKS RELATING TO THE PURCHASE OF
UNITS IN THE  PARTNERSHIP.  EACH  INVESTOR IS  DIRECTED  TO THE FULL  OPINION OF
COUNSEL  (APPENDIX E TO THE MEMORANDUM) AND TO THE DISCUSSION  UNDER THE CAPTION
"TAX ASPECTS OF THE  OFFERING"  HEREIN FOR A MORE  DETAILED  DISCUSSION  OF SUCH
RISKS. IT IS STRONGLY  RECOMMENDED THAT EACH INVESTOR INDEPENDENT LY CONSULT HIS
PERSONAL  TAX  COUNSEL  CONCERNING  THE TAX  CONSEQUENCES  ASSOCIATED  WITH  HIS
OWNERSHIP OF AN INTEREST IN THE PARTNERSHIP.  THE CONCLUSIONS REACHED IN THE TAX
OPINION ARE RENDERED  WITHOUT  ASSURANCE THAT SUCH CONCLUSIONS HAVE BEEN OR WILL
BE ACCEPTED BY THE SERVICE OR THE COURTS.

     THIS  MEMORANDUM  AND THE TAX OPINION DO NOT  DISCUSS,  NOR WILL COUNSEL BE
RENDERING  AN  OPINION  REGARDING,  ANY  ESTATE  AND GIFT TAX OR STATE AND LOCAL
INCOME  TAX  CONSEQUENCES  OF AN  INVESTMENT  IN THE  PARTNERSHIP.  FURTHERMORE,
INVESTORS SHOULD NOTE THAT THE ANTICIPATED FEDERAL INCOME TAX CONSEQUENCES OF AN
INVESTMENT IN THE PARTNERSHIP MAY BE ADVERSELY AFFECTED BY FUTURE CHANGES IN THE
FEDERAL  INCOME  TAX  LAWS,  WHETHER  BY  FUTURE  ACTS  OF  CONGRESS  OR  FUTURE
ADMINISTRATIVE  OR JUDICIAL  INTERPRETATIONS  OF APPLICABLE  FEDERAL  INCOME TAX
LAWS. ANY OF THE FOREGOING MAY BE GIVEN RETROACTIVE EFFECT.


                                      -12-
<PAGE>


     Possible  Legislative  or Other  Actions  Effecting Tax  Consequences.  The
federal income tax treatment of an investment in an  equipment/service  oriented
limited  partnership  such as the  Partnership  may be modified by  legislative,
judicial  or  administrative  action  at any  time,  and  any  such  action  may
retroactively  affect  investments  and commitments  previously  made. The rules
dealing with federal  income  taxation of limited  partnerships  are  constantly
under review by the Service,  resulting  in  revisions  of its  regulations  and
revised  interpretations of established concepts. In evaluating an investment in
the Partnership  each Investor should consult with his personal tax advisor with
respect to possible legislative,  judicial and administrative developments.  See
"Tax Aspects of the Offering - Further Changes in Tax Laws."

     Disqualification  of  Employee  Benefit  Plans.  Purchase  of  Units in the
Partnership  may  cause  certain  Limited   Partners,   certain   hospitals  and
out-patient  centers,  the  Partnership,  and  employees of the  foregoing to be
treated under Section 414(m) of the Code as being employed in the aggregate by a
single employer or "affiliated  service group" for purposes of minimum coverage,
participation and other employee benefit plan requirements  imposed by the Code.
In contrast,  an employer not affiliated under Section 414(m) need only consider
its own employees in determining whether its employee benefit plans satisfy Code
requirements.  Aggregation of employees could cause the  disqualification of the
retirement plans of certain Limited Partners and related  entities.  Aggregation
could  also  require  the value of the  vested  retirement  benefit  of a highly
compensated  employee who is a participant in a disqualified plan to be included
in his gross income,  regardless  of whether the employee is a Limited  Partner.
These rules may  adversely  affect  Investors  who are  currently  involved in a
medical  practice  joint  venture,  regardless of their purchase of Units in the
Partnership.  The General Partner and legal counsel to the Partnership have been
informally advised by officials of the Service that the Service would not likely
attempt to apply the affiliated service group rules to the Partnership,  nor has
the Service applied these rules to similar  arrangements  in the past.  Informal
discussions with the Service, however, are not binding on the Service, and there
can be no guarantee that the Service will not apply the affiliated service group
rules to the Partnership.  See "Tax Aspects of the Offering - Affiliated Service
Groups."

     Partnership   Allocations.   The  Partnership  Agreement  contains  certain
allocations of profits and losses that could be reallocated by the Service if it
were determined that the allocations did not have "substantial economic effect."
On December 31, 1985,  the Treasury  Regulations  dealing with the  propriety of
partnership  allocations  were  finalized.  As a general  rule,  allocations  of
profits and losses must have  "substantial  economic effect." Based upon current
law, Counsel is of the opinion that, if the question were litigated,  it is more
probable  than not that the  allocation  of profits  and losses set forth in the
Partnership  Agreement would be sustained for federal income tax purposes.  This
opinion is subject to certain  assumptions and  qualifications and each Investor
should  read  the  complete  discussion  of this  issue at "Tax  Aspects  of the
Offering - Partnership  Allocations." Investors are cautioned that the foregoing
opinion is based in part upon final  Regulations which have not been extensively
commented upon or construed by the courts.

     Income in Excess of Distributions.  The Partnership Agreement provides that
in each year annual Distributions may be made to the Partners. Excluded from the
definition of cash available for  distribution  is the amount of funds necessary
to discharge Partnership debts and to


                                      -13-
<PAGE>

maintain  certain cash reserves  deemed  necessary by the General  Partner.  The
Partnership will also incur significant  up-front capital costs that may have to
be paid out of the Partnership's revenues. Because of the circumstances outlined
above, if Partnership cash flow falls  substantially  below the estimates as set
forth in the Financial Projections, a Limited Partner could be subject to income
taxes payable out of personal funds to the extent of the  Partnership's  income,
if any,  attributed to him without  receiving  from the  Partnership  sufficient
Distributions to pay the Limited Partner's tax with respect to such income.  See
"Tax Aspects of the Offering - Taxable Income."

Other Investment Risks

     Conflicts of Interest.  The activities of the Partnership  involve numerous
immediate  and  potential  conflicts of interest  between the  Partnership,  the
General Partner and their Affiliates. See "Compensation and Reimbursement to the
General  Partner  and its  Affiliates,"  "General  Partner,"  "Competition"  and
"Conflicts of Interest."

     No  Participation  in  Management.  The General  Partner and the Management
Agent will have full  authority  to  supervise  the  business and affairs of the
Partnership pursuant to the Partnership  Agreement and the Management Agreement.
The Limited  Partners  will have no right to  participate  in the  management or
conduct of the  Partnership's  business and affairs.  The General  Partner,  the
Management  Agent,  their  employees  and their  Affiliates  are not required to
devote  their full time to the  Partnership's  affairs  and  intend to  continue
devoting  substantial  time and effort in organizing and operating  partnerships
and  other  ventures  throughout  the  United  States  that are  similar  to the
Partnership.  The General Partner and the Management Agent will devote such time
to the Partnership's business and affairs as they deem necessary and appropriate
in the exercise of reasonable judgment. The participation by any Limited Partner
in the  management  or control of the  Partnership's  affairs  could  render him
generally  liable  for the  liabilities  of the  Partnership  that  could not be
satisfied by assets of the Partnership.  See the Form of Legal Opinion of Womble
Carlyle  Sandridge & Rice, a Professional  Limited Liability  Company,  attached
hereto as Appendix E.

     Ability of the General Partner to Unilaterally Effect Fundamental  Changes.
The General Partner has the authority under the Partnership Agreement to effect,
without  Limited  Partner  consent,   transactions  that  could  result  in  the
termination or reorganization of the Partnership, a total or partial dilution of
the Limited  Partners'  interests  in the  Partnership,  and/or the  exchange of
interests in another  enterprise for the limited  partnership  interests held by
the Limited  Partners.  See "Summary of the Partnership  Agreement - Fundamental
Changes."

     Limited  Partners'  Obligation to Return Certain  Distributions.  Except as
provided by other  applicable  law and provided that a Limited  Partner does not
participate in the management of the Partnership,  he will not be liable for the
liabilities of the Partnership in excess of his investment, his ratable share of
undistributed  profits and any Distribution received from the Partnership if the
Limited Partner knew at the time of the  Distribution  that, after giving effect
to the Distribution,  all liabilities of the Partnership, other than liabilities
to Partners on account of their Partnership  interests and liabilities for which
the recourse of creditors is limited to specific  Partnership  property,  exceed
the fair value of the assets of the Partnership, except that the fair value


                                      -14-

<PAGE>

which the recourse of creditors is limited shall of Partnership property that is
subject to a liability  for which the recourse of creditors is limited  shall be
included  in assets  only to the  extent  that the fair  value of such  property
exceeds such liability.

     Dilution  of Limited  Partners'  Interests.  The  General  Partner  has the
authority  under the  Partnership  Agreement to cause the  Partnership to issue,
offer  and sell  additional  limited  partnership  interests  in the  future  (a
"Dilution  Offering").  Upon the successful closing of a Dilution Offering,  the
Percentage  Interests  of the  Partners  will be  proportionately  diluted.  See
"Summary of the Partnership Agreement - Dilution Offerings."

     Liability  Under  Limited  Partner Loan.  Investors  financing a portion of
their Unit  purchase  price with the proceeds of a Limited  Partner Loan will be
directly  obligated  to the Bank as  provided in the Loan  Documents.  A default
under such loan  could  result in the  foreclosure  of the  Investor's  right to
receive  any  Partnership  Distributions  as well as the loss of other  personal
assets  unrelated to his  Partnership  Interest.  Prospective  Investors  should
review  carefully all the  provisions  contained in the Loan  Commitment and the
terms of the  Limited  Partner  Note and Loan and  Security  Agreement  with his
counsel and financial advisors.  Neither the Partnership nor the General Partner
endorses  or  recommends  to  the  prospective  Investors  the  desirability  of
obtaining  financing  from the Bank nor does the  summary of the Loan  Documents
provided herein constitute legal advice. A Limited  Partner's  liability under a
Limited Partner Note continues regardless of whether the Limited Partner remains
a limited partner in the Partnership. As a consequence, such liability cannot be
avoided by claims, defenses or set-offs the Limited Partner may have against the
Partnership,  the  General  Partner  or their  Affiliates.  In  addition  to the
suitability  requirements discussed below, any prospective Investor applying for
a Bank loan to fund a portion of his Unit  purchase must be approved by the Bank
for  purposes  of his  delivery  of the  Limited  Partner  Note.  The  Bank  has
established its own criteria for approving the creditworthiness of a prospective
Investor  and has  not  established  objective  minimum  suitability  standards.
Instead, the Bank is empowered to accept or reject prospective Investors.

     Financial Projections.  The Financial Projections contain data that are the
General  Partner's  estimate of possible,  but not  necessarily the most likely,
results of the  Partnership's  operations  and  represent a prediction of future
events based on  assumptions  that may or may not occur and should not be relied
upon to indicate the actual results that will be attained.  Further, there is no
assurance that the financial  results of the Partnership will favorably  compare
to the historical financial results of the Business and the differences could be
materially  adverse.  The  Financial  Projections  begin on the Closing Date and
reflect five full twelve-month tax years; thus, they will not accurately reflect
the consequences of the first tax year of operations,  which will be less than a
full  twelve-month  period.  Investors  should carefully review the notes to the
Financial  Projections,  which contain various assumptions and other information
concerning the data therein.  The General  Partner  believes that the underlying
assumptions provide a reasonable basis for the projections, but some assumptions
inevitably will not materialize and  unanticipated  events and circumstances may
occur  subsequent to the date of the  Financial  Projections.  Accordingly,  the
actual  results  achieved  during  the  projected  periods  will  vary  from the
Financial  Projections and the variations may be material.  Furthermore,  to the
extent the Financial  Projections reflect taxable income and loss, Service audit
adjustments could adversely affect the timing and the amount of


                                      -15-

<PAGE>


deductions  that the  Partnership  plans to claim.  See  "Proposed  Activities -
Operation  of the Mobile  Lithotripsy  Systems"  and the  Financial  Projections
attached hereto as Appendix A.

     Long-term Investment.  The General Partner anticipates that the Partnership
will continue to operate the Mobile Lithotripsy Systems for an indefinite period
of time and that  the  Partnership  will  not  liquidate  prior to its  intended
termination.  Accordingly,  Investors  should  consider their  investment in the
Partnership as a long-term investment of indefinite duration.

     Limited Transferability and Illiquidity of Units.  Transferability of Units
is  severely  restricted  by the  Partnership  Agreement  and  the  Subscription
Agreement, and the consent of the General Partner is necessary for any transfer.
No public market for the Units exists and none is expected to develop. Moreover,
the Units  generally  may not be  transferred  unless  the  General  Partner  is
furnished with an opinion of counsel,  satisfactory to the General  Partner,  to
the effect that such assignment or transfer may be effected without registration
under  the  Securities  Act and any  state  securities  laws  applicable  to the
transfer.  The Partnership  will be under no obligation to register the Units or
otherwise take any action that would enable the assignment or transfer of a Unit
to be in compliance with applicable  federal and state  securities laws. Thus, a
Limited Partner may not be able to liquidate an investment in the Partnership in
the  event  of an  emergency  and the  Units  may  not be  readily  accepted  as
collateral for loans.  Moreover, a sale of a Unit by a Limited Partner may cause
adverse  tax  consequences  to the selling  Limited  Partner.  Accordingly,  the
purchase of Units must be  considered a long-term and illiquid  investment.  See
"Tax Aspects of the Offering - Sale of Partnership Units."

     Arbitrary  Offering  Price.  The  offering  price  of the  Units  has  been
determined by the General Partner based upon valuation of the Business conducted
by an independent third party and a related initial valuation of the Partnership
based on various assumptions that may or may not occur. A copy of this valuation
will be made  available  on  request.  The  offering  price of the Units is not,
however,  necessarily indicative of their value, if any, and no assurance can be
given that the Units, if and when  transferable,  could be sold for the offering
price or for any amount.

     Limitation  of  General  Partner's  Liability  and   Indemnification.   The
Partnership  Agreement  provides that the General  Partner will not be liable to
the  Partnership  or to any  Partner  for  errors in  judgment  or other acts or
omissions in connection with the Partnership, except for those involving willful
misconduct or gross negligence.  Therefore, the Limited Partners may have a more
limited  right  of  action  against  the  General  Partner  in the  event of its
misfeasance  or malfeasance  than they would have absent the  limitations in the
Partnership  Agreement.   In  the  opinion  of  the  SEC,   indemnification  for
liabilities  arising out of the  Securities Act is contrary to public policy and
therefore is unenforceable.

     Insurance.  Prime Medical Services, Inc. ("Prime"), the sole shareholder of
the General  Partner,  maintains active policies of insurance for the benefit of
itself  and  certain  affiliated  entities  covering  employee  crime,  workers'
compensation,   business  and  commercial  automobile  operations,  professional
liability,  inland marine,  business interruption,  real property and commercial
liability  risks.  These policies will be amended to include the Partnership and
the General Partner


                                      -16-
<PAGE>

believes that coverage limits of these policies are within  acceptable norms for
the extent and nature of the risks covered.  The Partnership will be responsible
for its share of premium costs. There are certain types of losses, however, that
are  either  uninsurable  or  are  not  economically  insurable.  For  instance,
contractual  liability is generally not covered under Prime's  policies.  Should
such losses  occur with  respect to  Partnership  operations,  or should  losses
exceed  insurance  coverage limits,  the Partnership  could suffer a loss of the
capital invested in its Mobile Lithotripsy  Systems and any anticipated  profits
from such investment.

     Optional  Purchase  of  Limited  Partner  Interests.  As  provided  in  the
Partnership  Agreement,  the General Partner has the option (which it may assign
to the  Partnership  in its sole  discretion)  to purchase all the interest of a
Limited Partner who (i) dies, (ii) becomes the subject of a domestic proceeding,
(iii) becomes  insolvent or (iv)  acquires a direct or indirect  ownership of an
interest in a competing  venture  (including  the lease or sublease of competing
technology).  The option  purchase price is an amount equal to the lesser of the
fair market  value of the  Partnership  Interest to be  purchased or the Limited
Partner's  share of the  Partnership's  book value,  if any, as reflected by the
Limited  Partner's  capital  account  in the  Partnership  (unadjusted  for  any
appreciation  in Partnership  assets and as reduced by  depreciation  deductions
claimed by the  Partnership  for tax  purposes).  The option  purchase  price is
likely to be considerably less than the fair market value of a Limited Partner's
interest  in  the  Partnership.  Because  losses,  depreciation  deductions  and
Distributions reduce capital accounts, and because appreciation in assets is not
reflected in capital accounts, it is the opinion of the General Partner that the
option  purchase  price may be  nominal  in amount.  In  addition,  in the event
existing or newly enacted laws or  regulations  or any other legal  developments
adversely  affect  (or  potentially  adversely  affect)  the  operation  of  the
Partnership  or the  business of the  Partnership  (e.g.,  any  prohibitions  on
provider ownership),  the General Partner, in its sole discretion,  is obligated
to either (i) purchase the Partnership  Interests of all of the Limited Partners
for an amount equal to the greater of a multiple of recent distributions or book
value  or  (ii)  dissolve  the  Partnership.  See the  form  of the  Partnership
Agreement  attached  hereto  as  Appendix  B and  "Summary  of  the  Partnership
Agreement - Optional Purchase of Limited Partner Interests."


                                    GLOSSARY

     Certain terms in this Memorandum shall have the following meanings:

     Act. The Act means the Tennessee  Revised Uniform Limited  Partnership Act,
as in effect on the date hereof.

     Affiliate.  An  Affiliate  is (i)  any  person,  partnership,  corporation,
association or other legal entity ("person") directly or indirectly controlling,
controlled  by or under  common  control with  another  person,  (ii) any person
owning or controlling  10% or more of the outstanding  voting  interests of such
other person, (iii) any officer,  director or partner of such person and (iv) if
such other person is an officer,  director or partner, any entity for which such
person acts in such capacity.


                                      -17-
<PAGE>

     Asset  Contribution.  The  contribution  to the  Partnership by the General
Partner of substantially all of the operating assets related to the Business and
rights and obligations under  approximately 30 Hospital  Contracts,  pursuant to
the Contribution Agreement.

     Bank. First-Citizens Bank & Trust Company.

     Business.  The  lithotripsy  services  business  currently  operated by the
General Partner.

     Capital Account.  The Partnership  capital account of a Partner as computed
pursuant to Article XI of the Partnership Agreement.

     Capital  Contributions.  All capital contributions made by a Partner or his
predecessor in interest which shall include,  without limitation,  contributions
made  pursuant  to  Article  VII  of  the  Partnership  Agreement.   The  assets
contributed  to  the  Partnership  by  the  General  Partner   pursuant  to  the
Contribution Agreement will be considered Capital Contributions.

     Capital  Transaction.  Any transaction which, were it to generate proceeds,
would produce Partnership Sales Proceeds or Partnership Refinancing Proceeds.

     Closing.  The admission to the Partnership as Limited Partners of Investors
subscribing for Units.

     Closing  Date.  The date of the  Closing,  which is  scheduled  to occur on
December 4, 1998 (or earlier, in the discretion of the General Partner, upon the
sale of all 80 Units as provided  herein),  unless extended at the discretion of
the General Partner for a period up to 180 days.

     Code.  The Internal  Revenue Code of 1986, or  corresponding  provisions of
subsequent, superseding revenue laws.

     Contract  Hospitals.  Any  hospital  or other  health  care  facility  that
contracts  directly  with  the  Partnership  for the  provision  of  lithotripsy
services.

     Contributed  Assets. The assets to be transferred to the Partnership by the
General  Partner  pursuant to the  Contribution  Agreement,  consisting  of five
Mobile  Lithotripsy  Systems,  rights and  obligations  under  approximately  30
Hospital Contracts and all other operating assets related to the Business.

     Contribution  Agreement.  The Contribution Agreement dated October 23, 1998
between the  Partnership and the General Partner which provides for the transfer
of the Contributed Assets to the Partnership by the General Partner.

     Counsel.  Counsel to the  Partnership,  Womble Carlyle  Sandridge & Rice, a
Professional  Limited Liability Company,  P.O. Drawer 84,  Winston-Salem,  North
Carolina 27102.


                                      -18-
<PAGE>

     Dilution Offering.  Pursuant to the terms of the Partnership Agreement, the
future offering of additional limited  partnership  interests in the Partnership
by the General Partner.  Any such offering generally will proportionally  reduce
the  existing  Percentage   Interests  of  the  then  current  Partners  in  the
Partnership.

     Distributions.  Cash or other  property,  from any source,  distributed  to
Limited Partners.

     Escrow Agent. First-Citizens Bank & Trust Company.

     FDA. The United States Food and Drug Administration.

     Financial  Projections.  Projections  of  Partnership  revenue,  cash flow,
income, loss, and sources and uses of funds, and of Partnership return per Unit,
attached  hereto as Appendix A,  which have been prepared by the General Partner
based upon the assumptions stated therein.

     Financial  Statement.  The Purchaser Financial  Statement,  included in the
Subscription  Packet  accompanying  this  Memorandum,  to be  furnished  by  the
Investors  for review by the  General  Partner and the Bank in  connection  with
their  decision  to  accept  or reject a  subscription  or extend  credit to the
Investor, respectively.

     General Partner. The general partner of the Partnership, Prime Lithotripter
Operations,  Inc., a Delaware corporation,  d/b/a Tennessee Valley Lithotripter,
and wholly-owned subsidiary of Prime.

     Hospital Contracts.  The lithotripsy services contracts the General Partner
has  entered  into  with  the  Contract  Hospitals,  substantially  all of which
contracts  will be assigned  to the  Partnership  pursuant  to the  Contribution
Agreement.

     Investors. Potential purchasers of Units of the Partnership.

     Lenders.  The  commercial  lending  syndicate  and certain other holders of
Prime indebtedness.

     Limited  Partner  Loans.  The loans to  Investors  to fund a portion of the
purchase  price of their Units as described in, and subject to the terms of, the
Loan Commitment.
 
     Limited  Partner  Note.  The  note  attached  as an  Exhibit  to  the  Loan
Commitment  which upon execution and acceptance will represent a Limited Partner
Loan made to an Investor.

     Limited Partners. The Limited Partners will be those Investors who purchase
Units and are admitted to the Partnership,  and any person admitted as a Limited
Partner in accordance with the provisions of the Partnership Agreement.


                                      -19-
<PAGE>

     Loan Commitment.  The commitment to the Partnership dated October 23,  1998
attached hereto as Appendix C, pursuant to which the Bank has agreed to fund the
Limited Partner Loans.

     Loss. The net loss  (including  capital losses and excluding Net Gains from
Capital  Transactions)  of the  Partnership  for each year as  determined by the
Partnership for federal income tax purposes.

     Memorandum.  This Confidential Private Placement Memorandum,  including all
Appendices hereto, and any amendment or supplement hereto.

     Mobile Lithotripsy Systems. The five tractor trailer transport systems with
installed and operational  lithotripters to be contributed to the Partnership by
the General Partner pursuant to the Contribution Agreement.

     Net Gains from Capital Transactions.  The gains realized by the Partnership
as a result of or upon any sale, exchange,  condemnation or other disposition of
the capital assets of the  Partnership  (which assets shall include Code Section
1231 assets) or as a result of or upon the damage or destruction of such capital
assets.

     Nonrecourse  Deductions.  A deduction as set forth in Treasury  Regulations
Section  1.704-2(b)(1).  The amount of  Nonrecourse  Deductions for a given Year
equals  the  excess,  if any,  of the net  increase,  if any,  in the  amount of
Partnership  Minimum  Gain  during  such Year over the  aggregate  amount of any
Distributions  during such Year of proceeds of a Nonrecourse  Liability that are
allocable to an increase in Partnership  Minimum Gain,  determined  according to
the provisions of Treasury Regulations Section 1.704-2(h).

     Nonrecourse  Liability.  Any Partnership liability (or portion thereof) for
which no  Partner  bears the  "economic  risk of loss,"  within  the  meaning of
Treasury Regulations Sections 1.704-2(b)(3), 1.752-1(a)(2) and 1.752-2.

     Offering. This offering of Units.

     Partner Minimum Gain. An amount,  with respect to each Partner  Nonrecourse
Debt,  equal to the  Partnership  Minimum Gain that would result if such Partner
Nonrecourse  Debt  were  treated  as  a  Nonrecourse  Liability,  determined  in
accordance with Treasury Regulations Section 1.704-2(i).

     Partner  Nonrecourse  Debt.  Any  nonrecourse  debt  (for the  purposes  of
Treasury  Regulations Section 1.1001-2) of the Partnership for which any Partner
bears the "economic  risk of loss,"  within the meaning of Treasury  Regulations
Section 1.752-2.

     Partner  Nonrecourse  Deductions.   Deductions  as  described  in  Treasury
Regulations Section 1.704-2(i)(2).  The amount of Partner Nonrecourse Deductions
with respect to a Partner


                                      -20-
<PAGE>

Nonrecourse Debt for any Year equals the excess, if any, of the net increase, if
any,  in the  amount  of  Partner  Minimum  Gain  attributable  to such  Partner
Nonrecourse Debt during such Year over the aggregate amount of any Distributions
during that Year to the Partner  that bears the  economic  risk of loss for such
Partner  Nonrecourse Debt to the extent such Distributions are from the proceeds
of such  Partner  Nonrecourse  Debt and are  allocable to an increase in Partner
Minimum  Gain  attributable  to such Partner  Nonrecourse  Debt,  determined  in
accordance with Treasury Regulations Section 1.704-2(i).

     Partners. The General Partner and the Limited Partners,  collectively, when
no distinction is required by the context in which the term is used herein.

     Partnership. Tennessee Valley Lithotripter Limited Partnership, a Tennessee
limited partnership.

     Partnership Agreement.  The Partnership's Agreement of Limited Partnership,
a copy of which is attached to this Memorandum as Appendix B, as the same may be
amended from time to time.

     Partnership Cash Flow. For the applicable  period,  the excess,  if any, of
(A) the sum of (i) all gross  receipts  from any source for such  period,  other
than from Partnership loans, Capital Transactions and Capital Contributions, and
(ii) any funds released by the Partnership from previously established reserves,
over  (B) the sum of (i) all  cash  expenses  paid by the  Partnership  for such
period,  (ii)  the  amount  of  all  payments  of  principal  on  loans  to  the
Partnership,  (iii)  capital  expenditures  of the  Partnership,  and (iv)  such
reasonable  reserves as the General  Partner shall deem  necessary or prudent to
set  aside  for  future  repairs,  improvements,  or  equipment  replacement  or
additions,  or to meet working  capital  requirements  or foreseen or unforeseen
future liabilities and contingencies of the Partnership; provided, however, that
the  amounts  referred  to in (B) (i),  (ii) and (iii) above shall be taken into
account  only to the extent not funded by Capital  Contributions,  loans or paid
out of previously  established reserves.  Such term shall also include all other
funds deemed  available for  distribution  and designated as  "Partnership  Cash
Flow" by the General Partner.

     Partnership  Interest.  The  interest  of a Partner in the  Partnership  as
defined by the Act and the Partnership Agreement.

     Partnership  Minimum Gain. Gain as defined in Treasury  Regulations Section
1.704-2(d).

     Partnership Refinancing Proceeds. The cash realized from the refinancing of
Partnership assets after retirement of any secured loans and less (i) payment of
all  expenses  relating  to the  transaction  and  (ii)  establishment  of  such
reasonable  reserves as the General  Partner shall deem  necessary or prudent to
set  aside  for  future  repairs,  improvements,  or  equipment  replacement  or
additions,  or to meet working  capital  requirements  or foreseen or unforeseen
future liabilities or contingencies of the Partnership.


                                      -21-
<PAGE>

     Partnership  Sales  Proceeds.  The cash realized  from the sale,  exchange,
casualty or other  disposition of all or a portion of  Partnership  assets after
the  retirement  of all secured  loans and less (i) the payment of all  expenses
related to the transaction and (ii) establishment of such reasonable reserves as
the  General  Partner  shall deem  necessary  or prudent to set aside for future
repairs, improvements, or equipment replacement or additions, or to meet working
capital   requirements   or  foreseen  or  unforeseen   future   liabilities  or
contingencies of the Partnership.

     Percentage Interest. The interest of each Partner in the Partnership, to be
determined  initially in the case of a Limited Partner acquiring his Partnership
Interest  in the  Offering  by  reference  to his  Unit  ownership.  Immediately
following the Asset Contribution, the General Partner will hold approximately an
80% interest in the Partnership in that capacity and the Limited Partners of the
Merging Partnerships  collectively will hold up to a 20% (approximate)  interest
in the Partnership.  The Percentage Interest may be set forth in the Partnership
Agreement or any other  document or agreement,  as a percentage or a fraction or
on any numerical basis deemed appropriate by the General Partner. The Percentage
Interest  of the  Partners  will be  reduced  in the event of a future  Dilution
Offering.

     Prime. Prime Medical Services,  Inc., a publicly held Delaware  corporation
and the sole shareholder of the General Partner.

     Prime Rate. The rate of interest  periodically  established by the Bank and
identified as such in  literature  published  and  circulated  within the Bank's
offices.

     Profit.  The net income of the  Partnership  for each year as determined by
the Partnership for federal income tax purposes.

     Pro Rata Basis.  In  connection  with an  allocation  or  distribution,  an
allocation or distribution in proportion to the respective  Percentage  Interest
of the class of Partners to which reference is made.

     Qualified  Income Offset Item. An  adjustment,  allocation or  distribution
described   in   Treasury    Regulations    Sections    1.704-1(b)(2)(ii)(d)(4),
1.704-1(b)(2)(ii)(d)(5)  or 1.704- 1(b)(2)(ii)(d)(6)  unexpectedly received by a
Partner.

     Sales Agent. MedTech  Investments,  Inc., a registered  broker-dealer,  and
member of the National  Association of Securities Dealers,  Inc. The Sales Agent
is an Affiliate of the General Partner.

     SEC. The United States Securities and Exchange Commission.

     Securities Act. The Securities Act of 1933, as amended.

     Service. The Internal Revenue Service.



                                      -22-
<PAGE>

     Service Area. The geographic region in which Partnership operations will be
conducted  and which  consists  primarily of Tennessee  and portions of Alabama,
Arkansas  and  Kentucky.  The General  Partner  reserves  the right to change or
expand the Service Area.

     Subscription  Agreement.  The  Subscription  Agreement,   included  in  the
Subscription Packet accompanying this Memorandum,  to be executed by the Limited
Partners in connection with their purchase of Units.

     Subscription Packet. The packet of subscription materials to be distributed
to and completed by Investors in connection with their subscription for Units.

     Units.  The 80 equal limited partner  interests in the Partnership  offered
pursuant to this Memorandum for a price per Unit of $9,114 in cash, up to $6,614
of which may be funded with the  proceeds of a Limited  Partner  Loan by certain
Investors acceptable to the Bank.


                              TERMS OF THE OFFERING

General

     The  Partnership  was  recently  formed  under  the  laws of the  State  of
Tennessee.  The  General  Partner  intends  to  contribute  to  the  Partnership
substantially all of the operating assets related to the Business and rights and
obligations  under   approximately  30  Hospital   Contracts   pursuant  to  the
Contribution  Agreement upon the Closing in exchange for at least an initial 80%
interest in the  Partnership.  The General  Partner of the  Partnership is Prime
Lithotripter Operations,  Inc. See "General Partner." The Partnership expects to
operate five mobile lithotripters which it will acquire from the General Partner
as provided above. See "Proposed Activities." The principal executive offices of
the General Partner and the Partnership are located at 1900 Church Street, Suite
101, Nashville, Tennessee, 37203.

     The Units and Subscription  Price.  Tennessee Valley  Lithotripter  Limited
Partnership,  a  limited  partnership  formed  under  the  laws of the  State of
Tennessee,  hereby  offers up to 80 Units of  limited  partner  interest  in the
Partnership.  Each Unit represents a 0.25% economic interest in the Partnership.
Investors should note that their initial Percentage Interests in the Partnership
may be reduced by future  Dilution  Offerings.  See "Summary of the  Partnership
Agreement  -  Dilution  Offerings"  and the  form of the  Partnership  Agreement
attached  hereto as Appendix B. The price for each Unit is $9,114 and is payable
in cash in full at subscription;  provided,  that prospective Investors who meet
certain  requirements may be able to fund a portion of their Unit purchase price
with the proceeds of certain third-party financing. The Partnership has arranged
for financing of a portion of the Units' purchase price with First-Citizens Bank
& Trust Company,  Fayetteville,  North Carolina (the "Bank"). Therefore, in lieu
of paying the entire Unit  purchase  price in cash,  prospective  Investors  may
execute  and  deliver to the Sales  Agent upon  delivery  of their  Subscription
Packets,  at least $2,500 cash and a Limited Partner Note in a maximum principal
amount of up to $6,614 per Unit to be purchased,  a Loan and Security Agreement,
Security


                                      -23-
<PAGE>

Agreement  and two  Uniform  Commercial  Code  Financing  Statements  ("UCC-1s")
(collectively,  the "Loan  Documents").  See  "Terms of the  Offering  - Limited
Partner Loans " and the forms of the Limited Partner Note, the Loan and Security
Agreement and Security  Agreement attached to the Loan Commitment as Exhibits A,
B and C,  respectively,  which is  attached  hereto as  Appendix C and the UCC's
attached as part of the Subscription Packet. Each Investor may purchase not less
than one Unit. The General Partner may, in its sole discretion,  reject in whole
or in part any subscription.  Rejected subscription funds (without interest) and
the executed Loan Documents will be returned promptly to the rejected Investor.

     The Offering. By this Offering the Partnership seeks to sell up to 80 Units
for up to $729,120 in cash ($709,120 net of Sales Agent's  commissions).  In the
event  subscriptions  for one or more Units are  received  and  accepted  by the
General Partner on the Closing Date and the Lenders release as collateral all of
the assets and/or consent to the Asset  Contribution as required by the terms of
the  Contribution  Agreement,  all  subscription  funds (plus interest) and Loan
Documents  held in escrow  will be released to the  Partnership.  See  "Proposed
Activities  - The Asset  Contribution."  If no  subscriptions  are  received and
accepted  during the  subscription  period as defined in  "Subscription  Period"
below or the necessary  consents and/or  releases are not secured,  the Offering
will be terminated and all subscription  funds (plus  interest),  Loan Documents
and other subscription documents will be returned to the Investors.  The General
Partner  and its  Affiliates  do not intend to purchase  Units in the  Offering;
provided,  however,  that the interest of the General  Partner will  increase by
0.25% for each unsold Unit. All  subscription  funds will be held in an interest
bearing escrow account until the Closing or the termination of the offering. See
"Risk Factors" and the Loan Commitment attached hereto as Appendix C.

     Subscription  Period.  The  subscription  period will  commence on the date
hereof and will  terminate at 5:00 p.m.,  Central  time, on December 4, 1998 (or
earlier, in the discretion of the General Partner, upon the sale of all 80 Units
as  provided  herein and the  consummation  of the Asset  Contribution),  unless
sooner  terminated by the General  Partner or unless  extended for an additional
period up to 180 days. See "Plan of Distribution."

     Acceptance of Subscriptions.  To enable the Bank and the General Partner to
make credit and investor decisions,  respectively, the prospective Investor must
complete and deliver to the General Partner a Purchaser  Financial  Statement in
the form included in the Subscription Packet accompanying this Memorandum,  or a
substitute  financial  statement  containing  the same  information  as provided
therein, and pages one and two of the prospective Investor's most recently filed
Form 1040 U.S.  Individual Income Tax Return. An Investor whose  subscription is
received and accepted will become a Limited  Partner in the  Partnership  on the
Closing Date  provided the  conditions  to Closing as provided  above under "The
Offering"  are met.  Subscriptions  may be  rejected  in whole or in part by the
General  Partner  and need not be accepted  in the order  received.  The General
Partner  reserves  the  right  to  reduce  any  subscriptions  and  to  allocate
subscriptions  received  in  the  event  the  Units  are  oversubscribed.  If  a
prospective  Investor  finances  a portion of his Unit  purchase  price with the
proceeds of a Limited Partner Note, the General Partner's  decision to issue and
sell a Unit  to  such  Investor  and  the  admission  of  such  Investor  to the
Partnership  as a Limited  Partner will be further  conditioned  upon the Bank's
acceptance of the Investor and funding


                                      -24-
<PAGE>

of the proceeds of the Limited  Partner Note at the Closing to the  Partnership.
To the extent the General Partner reduces an Investor's subscription as provided
above, the Investor's cash Unit purchase price will be proportionately  refunded
and reduced and, if applicable, the principal amount of his Limited Partner Note
will be reduced.  If the General Partner elects to terminate the Offering or the
conditions  to Closing as provided  above under "The  Offering" are not met, all
subscription  funds  (plus  interest),  Loan  Documents  and other  subscription
documents will be returned in full within 30 days of such termination. Notice of
acceptance of an Investor's  subscription  to purchase  Units and the Investor's
Percentage  Interest in the  Partnership  will be furnished  promptly  after the
Closing.

     Closing Date.  On the Closing  Date,  Investors  whose  subscriptions  were
accepted  will be  admitted  as Limited  Partners  to the  Partnership,  and the
subscription  funds  and Loan  Documents  will be  released  from  escrow to the
Partnership.

Limited Partner Loans

     The  purchase  price for the Units is payable in cash with the  prospective
Investor's  personal funds and/or in part with the proceeds of a Limited Partner
Loan.  Financing under the Limited Partner Loans was arranged by the Partnership
with the Bank as provided in the Loan Commitment, attached hereto as Appendix C.
If the prospective Investor wishes to finance a portion of the purchase price of
his Units as provided herein, he must deliver to the Sales Agent upon submission
of his  Subscription  Packet an executed Limited Partner Note and Note Addendum,
the form of which are attached as Exhibit A to the Loan  Commitment,  a Loan and
Security  Agreement,  the form of which is  attached  as  Exhibit B  to the Loan
Commitment,  a Security Agreement, the form of which is attached as Exhibit C to
the Loan  Commitment  and two  UCC-1's,  the form of which are  attached  to the
Subscription Packet  (collectively,  the "Loan Documents").  In no event may the
maximum  amount  borrowed per Unit exceed  $6,614.  The Limited  Partner Note is
repayable in twelve (12)  predetermined  installments in the respective  amounts
set forth in the Loan  Commitment.  The installments are payable on each January
15th,  April 15th,  June 15th and September  15th  commencing on April 15,  1999
(assuming  the  Closing  occurs in 1998),  with a  thirteenth  (13th)  and final
installment in an amount equal to the principal balance then owed on the Limited
Partner Note and all  accrued,  unpaid  interest  thereon due and payable on the
third anniversary of the first installment date.  Interest accrues at the Bank's
"Prime Rate," as the same may change from time to time. The Prime Rate refers to
that  rate  of  interest  established  by the  Bank  and  identified  as such in
literature published and circulated within the Bank's offices. Such term is used
as a means of identifying a rate of interest  index and not as a  representation
by the Bank that such rate is  necessarily  the lowest or most favorable rate of
interest offered to borrowers of the Bank generally. A prospective Investor will
have no  claim or right of  action  based on such  premise.  See the form of the
Limited Partner Note attached as Exhibit A to the Loan Commitment.

     The  Limited  Partner  Note will be secured by the cash flow  distributions
payable  with  respect to the  prospective  Investor's  Partnership  Interest as
provided in the Loan and Security  Agreement  and the Security  Agreement and as
evidenced by the UCC-1s.  By  executing  the Loan and  Security  Agreement,  the
prospective Investor requests the Bank to extend the Loan Commitment


                                      -25-
<PAGE>

to him if he is  approved  for a Limited  Partner  Loan.  The Loan and  Security
Agreement  also  authorizes  (i) the  Bank to pay the  proceeds  of the  Limited
Partner Note directly to the  Partnership  and the  Partnership  to  acknowledge
receipt thereof and (ii) the Partnership to remit funds directly to the Bank out
of the  prospective  Investor's  share of any  Distributions  represented by the
prospective  Investor's  percentage  Partnership  Interest  to fund  installment
payments due on the prospective Investor's Limited Partner Note. See the form of
the Loan and Security  Agreement  attached as  Exhibit B to the Loan  Commitment
which is attached hereto as Appendix C.

     If the  prospective  Investor is approved by the Bank and is  acceptable to
the General  Partner,  the Escrow  Agent will,  upon  Closing,  release the Loan
Documents to the Bank and the Bank will pay the proceeds of the Limited  Partner
Note to the Partnership to fund a portion of the Investor's  Unit purchase.  The
prospective  Investor will have  substantial  exposure under the Limited Partner
Note.  Regardless  of the  results  of  Partnership  operations,  a  prospective
Investor will remain liable to the Bank under his Limited Partner Note according
to its terms. The Bank can accelerate the entire principal amount of the Limited
Partner Note in the event the Bank in good faith believes the prospect of timely
payment or  performance  by the  prospective  Investor  is  impaired or the Bank
otherwise in good faith deems itself or its collateral insecure and upon certain
other events, including, but not limited to, nonpayment of any installment.  The
Bank may also request  additional  collateral  in the event it deems the Limited
Partner Note  insufficiently  secured.  A Limited  Partner's  liability  under a
Limited  Partner Note also continues  regardless of whether the Limited  Partner
remains a limited  partner in the  Partnership.  A Limited  Partner's  liability
under a Limited  Partner Note is directly with the Bank. As a consequence,  such
liability cannot be avoided by claims,  defenses or set-offs the Limited Partner
may have against the Partnership,  the General Partner or their  Affiliates.  In
addition  to the  suitability  requirements  discussed  below,  the  prospective
Investor  must be  approved  by the Bank for  purposes  of his  delivery  of the
Limited  Partner Note. The Bank has  established  its own criteria for approving
the creditworthiness of a prospective Investor and has not established objective
minimum  suitability  standards.  Instead,  the Bank is  empowered  to accept or
reject  prospective  Investors.  See "Risk  Factors - Other  Investment  Risks -
Liability Under Limited Partner Loans."

Offering Exemptions

     The  Units  are  being  offered  and will be sold in  reliance  on:  (1) an
exemption from the  registration  requirements of the Securities Act of 1933, as
amended,  provided  in  Section 4(2)  thereof  and  Rule  506  of  Regulation  D
promulgated thereunder,  as amended; (2) an exemption from registration provided
in the Alabama Securities Act, as amended,  and a policy statement issued by the
Alabama Securities  Commission;  (3) an exemption from registration  provided in
Section 23-42- 509(c) of the Arkansas Code of 1957  Annotated,  as amended,  and
Rule 509.01(b) of the regulations  promulgated  thereunder,  as amended;  (4) an
exemption  from  registration  provided in the  Securities  Act of Kentucky,  as
amended;  and (5) an  exemption  from  registration  provided in Sections  48-2-
102(14)(F)(iv) and 48-2-125(b) of the Tennessee Code Annotated,  as amended, and
Rule 0780-4-2- .12(1)(c) of the regulations promulgated thereunder,  as amended.
Only a limited number of investors other than accredited investors, as such term
is defined under Regulation D of the Securities Act of


                                      -26-
<PAGE>

1933, as amended,  may purchase Units hereunder.  The suitability  standards set
forth  below have been  established  in order to comply  with the terms of these
registration exemptions.

Suitability Standards

     An investment in the  Partnership  involves a high degree of financial risk
and is suitable only for persons of substantial financial means who have no need
for  liquidity  in their  investments  and who can  afford  to lose all of their
investment.  For purposes of analyzing his investment in the  Partnership,  each
Investor  should  regard his exposure  with respect to his  investment to be his
cash  subscription  including,  if  applicable,  the  amount  for  which  he  is
personally  liable under his Limited  Partner Note. See "Terms of the Offering -
Limited  Partner  Loans." An Investor  should not purchase a Unit if he does not
have resources  sufficient to bear the loss of this entire  amount.  The General
Partner anticipates  selling Units only to individual  Investors;  however,  the
General Partner reserves the right to sell Units to entities.  See "Terms of the
Offering - General - The Offering."  Because of the risks involved,  the General
Partner  anticipates  selling the Units only to  Investors  residing in Alabama,
Arkansas,  Kentucky and  Tennessee who it  reasonably  believes are  "accredited
investors"  as that term is defined in Rule 501 under the  Securities  Act,  but
reserves  the right to sell to a limited  number  of  Investors  who do not meet
these  criteria.   Certain  institutions  and  the  following   individuals  are
"accredited investors":

(1)  An  individual  whose net worth (or joint net worth  with  spouse)  exceeds
     $1,000,000 at the time of subscription;

(2)  An  individual  who has had an  individual  income in excess of $200,000 in
     each of the two most  recent  fiscal  years and who  reasonably  expects an
     individual income in excess of $200,000 in the current year; or

(3)  An individual  who has had with spouse a joint income in excess of $300,000
     in each of the two most recent  fiscal years and who  reasonably  expects a
     joint income in excess of $300,000 in the current year.

     Investors  must also be at least 21 years old and otherwise  duly qualified
to acquire and hold  partnership  interests.  The General  Partner  reserves the
right to  refuse  to sell  Units to any  person,  subject  to  applicable  state
securities laws.

     Each Investor must make an independent  judgment,  in consultation with his
own counsel,  accountant,  investment advisor or business advisor, as to whether
an  investment in the Units is  advisable.  The fact that an Investor  meets the
Partnership's or the Bank's  suitability  standards should in no way be taken as
an indication that an investment in the Units is advisable for that
Investor.

     It is anticipated that suitability  standards comparable to those set forth
above will be imposed by the Partnership in connection with resales,  if any, of
the Units.  Transferability  of Units is severely  restricted by the Partnership
Agreement and the Subscription Agreement. See "Risk


                                      -27-
<PAGE>

Factors" and "Summary of the Partnership Agreement - Restrictions on Transfer of
Partnership Interests."

     Investors who wish to subscribe for Units must represent to the Partnership
that they meet the foregoing standards by completing and delivering to the Sales
Agent a Purchaser  Questionnaire in the form included in the Subscription Packet
accompanying this Memorandum.  Each Purchaser Representative,  if any, acting on
behalf of an Investor in connection with this Offering must complete and deliver
to the Sales Agent a Purchaser Representative Questionnaire,  which will be made
available to an Investor upon request.

How to Invest

     Investors who meet the qualifications for investment in the Partnership and
who wish to subscribe for Units may do so as follows:

     a. By  completing,  dating,  signing  and  acknowledging  the  Subscription
Agreement and the Counterpart  Signature Page to the Partnership  Agreement (the
forms of  which  are  included  in the  Subscription  Packet  accompanying  this
Memorandum);

     b. By completing,  dating and signing the Purchaser Questionnaire (the form
of which is included in the Subscription Packet accompanying this Memorandum);

     c. By having any  Purchaser  Representative  who has acted on behalf of the
Investor in connection with this Offering complete,  date and sign the Purchaser
Representative  Questionnaire  (a copy of which is available upon request to the
General Partner);

     d. By completing, dating and signing the Purchaser Financial Statement (the
form  of  which  is  included  in  the  Subscription  Packet  accompanying  this
Memorandum),  or in lieu  thereof,  substituting  the  Investor's  own  personal
executed financial statement,  as long as such substitute statement contains the
same  information  as  provided  in the form,  and  attaching  to the  Purchaser
Financial Statement or substitute  statement,  as the case may be, pages one and
two of the Investor's most recently filed Form 1040 U.S.  Individual  Income Tax
Return;

     e. If the  prospective  Investor  is  financing  a portion of his  purchase
pursuant to a Limited  Partner Loan, by completing and signing (on the front and
the back),  but not dating,  a Limited Partner Note and signing the form of Note
Addendum attached thereto (the form of which Limited Partner Note (including the
Note Addendum) is included in the Subscription Packet and is attached as Exhibit
A to the Loan Commitment);

     f. If the  prospective  Investor  is  financing  a portion of his  purchase
pursuant to a Limited  Partner Loan, by completing  and signing (but not dating)
the Loan and Security


                                      -28-
<PAGE>

Agreement  (the form of which is  included  in the  Subscription  Packet  and is
attached as Exhibit B to the Loan Commitment);

     g. If the  prospective  Investor  is  financing  a portion of his  purchase
pursuant to a Limited  Partner Loan, by completing  and signing (but not dating)
the Security Agreement (the form of which is included in the Subscription Packet
and is attached as Exhibit C to the Loan Commitment);

     h. If the  prospective  Investor  is  financing  a portion of his  purchase
pursuant to a Limited  Partner Loan, by completing and signing two copies of the
UCC-1 (the form of which is included in the Assignment Packet);

     i. By delivering or mailing all of the foregoing,  together with a check in
the appropriate amount payable to "First-Citizens as Escrow Agent for TVLLP," to
the Sales Agent at 2008 Litho Place, Fayetteville, North Carolina 28304.

     All  information  provided by Investors,  including the  information in the
Loan  Documents,   the  Purchaser  Questionnaire  and  the  Purchaser  Financial
Statement,   will  be  kept   confidential  and  not  disclosed  except  to  the
Partnership,  the General  Partner,  the Bank and their  respective  counsel and
Affiliates and, if required, to governmental and regulatory authorities.

Restrictions on Transfer of Units

     The Units have not been  registered  under the  Securities Act or under any
state  securities  laws and  holders  of Units  have no  right  to  require  the
registration  of such Units or to require the  Partnership to disclose  publicly
information  concerning  the  Partnership.  Units  can be  transferred  only  in
accordance with the provisions of, and upon  satisfaction of, the conditions set
forth  in  the  Partnership  Agreement.  Among  other  things,  the  Partnership
Agreement  provides that no  assignment of Units may be made if such  assignment
could not be effected  without  registration  under the  Securities Act or state
securities  laws.  Moreover,  the  assignment  generally  must  be  made  to  an
individual   approved  by  the  General   Partner  who  meets  the   suitability
requirements described in this Memorandum.

     Assignors of Units will be required to execute certain  documents,  in form
and substance satisfactory to the General Partner,  instructing it to effect the
assignment.  Assignees  of Units  may also,  in the  discretion  of the  General
Partner,  be required  to pay all costs and  expenses  of the  Partnership  with
respect to the assignment.

     Any assignment of Units or the right to receive  Partnership  Distributions
in respect of Units will not release the assignor from any liabilities connected
with the assigned Units,  including  liabilities under any Limited Partner Loan.
An assignee,  whether by sale or otherwise,  will acquire only the rights of the
assignor in the profits and capital of the  Partnership  and not the rights of a
Limited Partner,  unless such assignee becomes a substituted Limited Partner. An
assignee may not become a  substituted  Limited  Partner  without (i) either the
written consent of the assignor and


                                      -29-
<PAGE>

the  General  Partner,  or the  consent of a Majority in Interest of the Limited
Partners (except the assignor Limited Partner) and the General Partner, (ii) the
submission of certain  documents  and (iii) the payment of expenses  incurred by
the  Partnership  in effecting  the  substitution.  An assignee,  regardless  of
whether he becomes a substituted  Limited Partner,  will be subject to and bound
by all the terms and conditions of the Partnership Agreement with respect to the
assigned  Units.  See "Summary of the  Partnership  Interest -  Restrictions  on
Transfer of Partnership Assets."


                              PLAN OF DISTRIBUTION

     Subscriptions for Units will be solicited by MedTech Investments, Inc., the
Sales Agent. The Sales Agent is an Affiliate of the General  Partner.  The Sales
Agent has entered into a Sales Agency Agreement with the Partnership pursuant to
which the Sales Agent has agreed to act as exclusive  agent for the placement of
the  Units on a "best  efforts"  any or all  basis.  The  Sales  Agent  will not
purchase any Units.

     The  Sales  Agent  is a North  Carolina  corporation  that  was  formed  on
December 23, 1987, and became a member of the National Association of Securities
Dealers on  March 15,  1988.  The Sales  Agent may be  engaged in other  similar
offerings on behalf of the Affiliates of the General Partner during the pendency
of  this  Offering  and  in the  future.  Investors  should  note  the  material
relationship  between the Sales Agent and the General  Partner,  and are advised
that the relationship  creates conflicts in the Sales Agent's performance of its
due diligence responsibilities under the federal securities laws.

     As compensation for its services, the Sales Agent will receive a commission
equal to $250 for each Unit sold.  No  commission  is payable to the Sales Agent
unless a successful  Closing has occurred.  No other commissions will be paid in
connection with this Offering.  Subject to the conditions as provided above, the
Sales Agent may be reimbursed by the Partnership for its out-of- pocket expenses
associated  with the sale of the Units in an amount not to exceed  $15,000.  The
Partnership has agreed to indemnify the Sales Agent against certain liabilities,
including liabilities under the Securities Act.

     The  Partnership  will  not pay the fees of any  purchaser  representative,
financial advisor,  attorney,  accountant or other agent retained by an Investor
in connection with his or her decision to purchase Units.

     The subscription period will commence on the date hereof and will terminate
at 5:00 p.m., Central time, on December 4,  1998 (or earlier,  in the discretion
of the  General  Partner,  upon the sale of all 80  Units as  provided  herein),
unless  extended  at the  discretion  of the General  Partner for an  additional
period not to exceed 180 days. No minimum  number of Units must be sold in order
for this Offering to close.

     An Investor  whose  subscription  is received  and  accepted  will become a
Limited  Partner in the  Partnership  on the Closing  Date  provided all closing
conditions are satisfied. See


                                      -30-
<PAGE>

"Terms of the Offering - The Offering."  Subscriptions  may be rejected in whole
or in part by the  Partnership  and need not be accepted in the order  received.
The Partnership  reserves the right to reduce any  subscriptions and to allocate
subscriptions received in the event the Units are oversubscribed.  See "Terms of
the Offering - General - Acceptance of  Subscriptions."  If the General  Partner
elects to terminate the Offering,  or no Units are timely  purchased as provided
herein,  all  subscription  funds  (plus  interest),  Loan  Documents  and other
subscription  documents  will be  returned  within 30 days of such  termination.
Notice of  acceptance of an Investor's  subscription  to purchase  Units and his
initial Percentage  Interest in the Partnership will be furnished promptly after
the Closing. To the extent the Partnership reduces an Investor's subscription as
provided above,  the Investor's cash Unit purchase price will be  proportionally
refunded and reduced and, if  applicable,  the  principal  amount of his Limited
Partner Note will be reduced. All subscription funds will be held in an interest
bearing  escrow  account  with  the  Escrow  Agent  until  the  Closing  or  the
termination of the Offering.

                               PROPOSED ACTIVITIES

Purpose

     The primary purposes of the Partnership are (i) to improve the provision of
health-  care in the  Service  Area by  taking  advantage  of the  technological
innovations  offered by the Mobile  Lithotripsy  Systems  and the  Partnership's
quality  assurance  and  outcome  analysis  programs,  and  (ii)  to  make  cash
distributions to its Partners from revenues  generated from the operation of the
Mobile  Lithotripsy  Systems.  There is no assurance  that these efforts will be
successful.  See "Risk Factors." Following the Closing,  the Partnership expects
to  continue  the current  operations  of the  General  Partner.  See "The Asset
Contribution" and "Operation of the Business" below.

Treatment Methods For Kidney Stone Disease

     Urolithiasis, or kidney stone disease, affects an estimated 600,000 persons
per year in the United  States.  The exact cause of kidney  stone  formation  is
unclear,  although  it has been  attributed  to diet,  climate,  metabolism  and
certain  medications.  A number of methods  currently  are used to treat  kidney
stones.  These  methods range from drug therapy to dissolve the stone to an open
surgical  procedure for stone removal.  Approximately  75 percent of all urinary
stones pass  spontaneously,  usually within one to two weeks, and require little
or no clinical or  surgical  intervention.  All other  kidney  stones,  however,
require  some form of medical or  surgical  treatment.  The type of  treatment a
urologist  chooses depends on a number of factors such as the size of the stone,
its  location in the urinary  system and  whether the stone is  contributing  to
other urinary  complications  such as blockage or infection.  The following is a
brief discussion of current treatment methods.

     Drug Therapy.  Grain-sized  stones usually pass  spontaneously in the urine
and the patient can be treated  with drugs to reduce  discomfort  and to prevent
further  stone  recurrence.  Larger stones of uric acid also can be dissolved by
appropriate drugs to allow normal passage from


                                      -31-
<PAGE>

the urinary system.  Drug therapy is used to institute  therapeutic  measures to
lower the concentration of stone-forming ions such as calcium and oxalate in the
urine.

     Cystoscopic  Procedures.  Stones  that form or lodge in the  lower  urinary
tract and bladder and that cannot be  excreted  spontaneously  sometimes  can be
extracted through the urethra with a standard  cystoscope combined with either a
stone basket (for a stone in the ureter) or a special stone removal forceps (for
a stone in the  bladder).  Occasionally,  this  procedure can injure the ureter.
Unlike stones in the lower urinary tract,  stones in the upper urinary tract (in
the ureter,  renal  pelvis and the kidney)  are not  accessible  with a standard
cystoscope.

     Ureteroscopic  Procedures.  Ureteroscopy  may  be an  alternative  surgical
method for the  removal  of stones  from the  urinary  tract.  Various  forms of
ureteroscopes  that use fiber  optics can be  inserted  through  the bladder and
ureter to allow a surgeon to view the  internal  recesses  of the upper  urinary
tract and the kidney.  When a stone is observed,  the surgeon can remove it with
special  grapples that pass through the  ureteroscope.  If the stone's size does
not  permit  it to be  extracted,  a  laser  fiber,  electrohydraulic  probe  or
ultrasound  probe can be inserted  into the  ureteroscope  to  disintegrate  the
stone.  Stones that are lodged within the kidney,  however,  cannot  normally be
treated by this method.

     Percutaneous  Lithotripsy.  Percutaneous  lithotripsy  allows  surgeons  to
remove  stones from the kidney,  renal pelvis and upper  urinary tract through a
nephrotomy, a percutaneous channel established through the patient's skin. Under
fluoroscopic  control a long,  fine needle is inserted  into the kidney's  urine
collection  system  through a small  puncture in the patient's  side. The needle
tract is  progressively  widened with dilators and tubes until a nephroscope can
be inserted.  The nephroscope  provides direct vision and direct access into the
recesses  of the  kidney  and the renal  pelvis.  When a stone is  located,  the
working  channel  of the  nephroscope  can  accommodate  various  stone  removal
attachments  such as loops,  baskets or forceps to extract small stones.  When a
stone wider than the  working  channel of the  nephroscope  is  encountered,  an
ultrasonic  lithotrite,  laser fiber, or electrohydraulic  probe can be inserted
into the working channel to disintegrate the stone.

     Laser  Procedures.  Laser  technology  is a fairly new method of destroying
urinary  stones found in the bladder and the ureter.  In this  procedure a laser
light that  fragments  urinary  stones is conducted  through a fiber-optic  tube
inserted through an instrument.  In June 1988, the FDA approved the use of laser
technology to fragment  urinary  stones in the ureter through the insertion of a
fiber-optic  fiber.  Laser procedures are generally done through endoscopes such
as ureteroscopes or nephroscopes.

     Open Surgery.  The traditional open surgical procedure,  widely used before
the  development  of  lithotripsy,  is a major  operation  that requires a large
incision  into the  kidney or ureter to gain  access to the stone.  The  patient
spends as long as two weeks in the hospital  followed by a convalescence  period
of four to six weeks.  In addition to the risk associated with the open surgical
procedure,  another  stone can form in the  kidney or renal  pelvis  that  would
necessitate  performing  another surgical procedure that could result in loss of
the kidney.



                                      -32-
<PAGE>

     Extracorporeal   Shock-Wave  Lithotripsy.   The  extracorporeal  shock-wave
lithotripter,  introduced  in the United  States from West Germany in 1984,  has
dramatically  changed the course of kidney stone disease treatment.  The General
Partner  estimates  that  currently up to 95% of all kidney  stones that require
treatment  can be treated  with  lithotripsy.  Lithotripsy  involves  the use of
shock-waves to disintegrate kidney stones noninvasively.

     HM3  lithotripters  employ a special water bath to maintain the pressure of
shock-  waves.  With these  systems,  a patient is immersed in a special tank of
water and shock-waves  generated by a disposable  high-voltage  underwater spark
electrode are focused on a kidney stone. A fluoroscopic  X-ray system is used to
position the patient accurately over the shock-wave generator in the water bath.
While the patient is under conscious sedation,  usually 500 to 2,000 shock-waves
of short  duration  pass through the water,  penetrate  the flesh and impact the
hard, crystalline kidney stone, causing it to disintegrate.  The shock-waves are
regulated  by an ECG monitor  that  monitors  cardiac  function and prevents the
generation  of the  shock-wave  during  the  sensitive  period of the  patient's
cardiac  cycle.  Disintegration  of the  kidney  stone  occurs  in about  thirty
minutes.  During the procedure and for several days thereafter,  stone fragments
are  passed  with  the  urine.  Some  newer  lithotripters  employ  a  different
shock-wave  component which does not require the use of a water bath or, in most
cases, general anesthesia. The Partnership's lithotripters are first generation,
but have been upgraded to eliminate the need for general  anesthesia and, in the
experience of the General Partner,  produce lower  retreatment rates than second
generation machines. See "Description of the Assets" below.

The Asset Contribution

     The following  description  of the Asset  Contribution  summarizes  certain
provisions of the  Contribution  Agreement,  is not a complete  statement of the
rights and  obligations  set forth  therein and is  qualified in its entirety by
reference to the complete text of the Contribution Agreement, a copy of which is
available upon request from the General Partner.

     Concurrent  with the Closing of the Offering,  the General  Partner and the
Partnership  will  effect  the  contribution  of the  Contributed  Assets to the
Partnership in exchange for the General Partner's  Partnership Interest pursuant
to the terms of the Contribution  Agreement.  Because certain of the Contributed
Assets have been pledged as collateral for certain  obligations  of Prime,  both
the consummation of the transactions  contemplated by the Contribution Agreement
and the Closing of the  Offering are  conditioned  upon the release of all liens
against  such  Assets by the  Lenders  and/or the  consent of the Lenders to the
transfer of such Assets from the General Partner to the Partnership.  See "Terms
of the Offering - The  Offering"  and "-  Description  of the Assets" under this
section.

     The  General  Partner  will  receive  at  least  an  80%  interest  in  the
Partnership  in exchange for the  contribution  of the Assets.  The  Partnership
Interest of the General Partner will increase by 0.25% per unsold Unit.


                                      -33-
<PAGE>

History of the Business

     The General  Partner  purchased the Business from three separate  groups of
physicians  in October 1993. In  connection  with the  acquisition,  each of the
selling  physicians  entered into a  noncompetition  agreement  with the General
Partner. All of such noncompetition  agreements expired on October 15, 1998. The
General Partner anticipates that certain former owners may elect to compete with
the Business since they are no longer subject to the terms of these  agreements.
Whether and to what extent such may be the case cannot be  accurately  predicted
by the General  Partner.  Significant  additional  competition  would  adversely
impact proposed Partnership  operations,  and the effect could be material.  See
"Risk  Factors  -  Operating  Risks -  Competition"  and  "Risk  Factors - Other
Investment Risks - Financial Projections." At the time of its acquisition by the
General Partner,  the Business operated three Mobile Lithotripsy Systems and one
fixed-base  lithotripter,  which was converted to a Mobile Lithotripsy System in
early 1995. A fifth Mobile Lithotripsy System was added in June 1996.

Description of the Assets

     The  equipment   used  in  the  Business   consists  of  five  Dornier  HM3
Lithotripters,  five trailers upfitted to house the lithotripters, five tractors
to transport  the  trailers  from site to site and other  miscellaneous  medical
equipment and supplies.  Descriptions of the principle items of equipment appear
below.

     Lithotripters. Three Dornier HM3 lithotripters were acquired by the General
Partner in April 1991, and two more were acquired in October 1992 and June 1996,
respectively.  Each of the Dornier HM3 units consists of a stainless steel water
tub, patient positioning unit, shock-wave generator,  radiological  localization
system, hydraulic supply system, water treatment system and control cabinet. The
localization  system,  which employs two image  intensifiers,  allows normal and
high-current  fluoroscopy.  The control cabinet  contains control units for both
image  intensifiers,  TV monitors and video image memory.  After positioning the
patient in the tub, the image  intensifiers  are swung by hand into the centered
position and are moved along the cental beams by motor.

     The shock-wave  generation system consists of the capacitor  charging unit,
the pulse generator, shock-wave generator, ECG-trigger unit, ellipsoid reflector
and underwater electrode. The underwater electrode is mechanically linked to the
reflector and is positioned in such a way that the electric energy is discharged
exactly in the lower  focus.  The  shock-wave  energy,  which can be  controlled
within  defined  limits,  is taken  from the  charging  unit and  stored  in the
shock-wave generator. The spark pulses are released synchronously to the R-waves
of the  ECG-signals  via the ECG triggering  unit. The spark pulses cause energy
discharges  in the form of arcs  between the  electrode  tips of the  underwater
electrode  leading to  explosive  vaporizations  of the water in the zone of the
arc.  The  resulting  shock-waves  are  reflected  by  the  ellipsoid  wall  and
concentrated  in the upper focus where the kidney stone is located.  The patient
positioning  unit  enables  the exact  line-up of the kidney  stone in the upper
focus of the reflector.  The patient is placed on a support which makes possible
the optimum  application of the  shock-waves  in accordance  with the individual
anatomic  conditions.   The  movement  of  the  patient  support  in  the  three
coordinates is performed by


                                      -34-
<PAGE>

a positioning  unit,  which is guided by a guideway  installed on the ceiling of
the trailer. The positioning procedure is performed hydraulically and controlled
via the control cabinet.

     Each of the  lithotripters  to be contributed to the  Partnership  has been
upgraded  by the  (i)  installation  of a  larger  ellipsoid  and  40  nanofarad
generator which enables treatment without the need for general anesthesia;  (ii)
installation  of a  Stryker  Frame  and  manual  gantry  controls  which  enable
treatment stones in the distal third of the ureter;  and (iii) conversion of the
imaging system from analogue to digital.  Each of the  lithotripters has been in
operation  for more than twelve  years,  and other than the  upgrades  described
above, typically require only routine maintenance and repair.

     Tractor Trailers.  The trailers consist of (i) a 1986 Calumet trailer, (ii)
a 1991 Calumet  trailer,  (iii) a 1992  Calumet  trailer,  (iv) a 1995  Ti-Brook
trailer and (v) a 1996 Best  Trailer.  With the  exception  of the 1986  Calumet
trailer which was acquired in April 1994,  all the trailers were  purchased new.
Each trailer is upfitted to house an HM3  lithotripter.  Each trailer contains a
generator and an HVAC system,  is fully wired and is fitted with expanding sides
to accommodate operation of the lithotripter.  Each of the three oldest trailers
each has been  refurbished  once, and the General Partner  anticipates that they
will  either have to be replaced or  substantially  refurbished  and  redesigned
within the next three years.  The trailers are transported  from site to site by
the tractors. See "- Anticipated Partnership Expenditures" in this Section.

     The  tractors  consist  of (i) two 1988  Kenworth  tractors,  (ii) two 1989
Kenworth  tractors and (iii) a 1993 Freightliner  tractor.  Each of the tractors
was used when purchased.  The General Partner  anticipates  that the four oldest
tractors  will  have  to be  replaced  within  the  next  three  years.  See  "-
Anticipated Partnership Expenditures" in this Section.

     Hospital Contracts.  The General Partner is party to separate contracts for
the provision of lithotripsy services (the "Hospital Contracts") to 31 hospitals
in the Service Area (the  "Contract  Hospitals").  Eighteen  Hospital  Contracts
grant the General Partner the exclusive right to deliver lithotripsy services to
the relevant Contract  Hospital.  The Hospital  Contracts  generally require the
General Partner to make a lithotripter  available at the Contract  Hospitals for
use by physicians making appropriate  arrangements with the Contract  Hospitals.
The General Partner also generally  provides a technician and certain  ancillary
services such as scheduling and disposable  medical  products  necessary for the
lithotripsy  procedure.  The Hospital Contracts provide that the General Partner
receives a per  procedure  fee. The hospitals  and clinics are  responsible  for
billing  and  collecting  their own fees from all  insurance  payors.  See "Risk
Factors  -   Operating   Risks  -  Impact  of   Insurance   Reimbursement"   and
"Competition." Pursuant to the Contribution Agreement,  the General Partner will
contribute to the Partnership the General  Partner's rights and obligations with
respect to all of the Hospital  Contracts  except the Lake  Cumberland  Regional
Hospital  agreement  which the General  Partner is obligated to assign to one of
its Affiliates.

     Most of the Hospital Contracts provide that they are automatically  renewed
on a  year-to-year  basis unless notice is given 90 days prior to the end of the
relevant  renewal  term.  In  addition,  most  of  the  Hospital  Contracts  are
terminable upon 90 days written notice by either party without cause and/or upon
the occurrence of customary events of default. Certain Hospital Contracts


                                      -35-
<PAGE>

have  continued  beyond their stated terms and  applicable  renewal  periods and
could be  canceled  at any  time.  Blount  Memorial  Hospital  (contracted  with
competing  vendor),  Middle  Tennessee  Medical Center (leased its own equipment
with plans to purchase in 1999),  Columbia Outpatient Surgery,  Inc. (contracted
with competing vendor) and North Side Hospital (acquired its own equipment) each
have terminated  lithotripsy  services contracts with the General Partner within
the last year. The General Partner believes it has a good relationship with many
of the contracting  parties and does not anticipate  significant  cancellations.
There is no assurance, however, that such cancellations will not occur. With the
exception  of the  Cumberland  Medical  Center  Agreement,  none of the Hospital
Contracts  requires  the  General  Partner to obtain  the  consent of a Contract
Hospital  prior to  assigning  its  Hospital  Contract to the  Partnership.  The
General  Partner  does not  intend  to  obtain  any  consents,  and  there is no
assurance that one or more Contract  Hospitals will not react unfavorably to the
assignment of the Hospital  Contracts to the  Partnership and seek to terminate.
See "Risk Factors - Operating Risks - Contract Terms and Termination."

     Twenty-three  Contract  Hospitals  are located in  Tennessee,  six Contract
Hospitals are located in Kentucky,  one Contract  Hospital is located in Alabama
and one Contract Hospital is located in Arkansas.

Anticipated Partnership Expenditures

     Three of the Calumet trailers are scheduled to be refurbished in 1999 at an
estimated cost of approximately $65,000 per trailer,  which amount would be paid
to  AK  Associates,   an  Affiliate  of  the  General  Partner  engaged  in  the
refurbishment of medical equipment  trailers and coaches.  See "Compensation and
Reimbursement  to the General  Partner and its  Affiliates."  In  addition,  the
General  Partner  anticipates  refurbishing  the remaining  trailers in 2000 and
2001,  respectively.  Refurbishment  of a trailer  typically  takes six to eight
weeks  and  consists  of  removal  and   reinstallation   of  the  lithotripter,
replacement of the interior floors,  cabinets and wall coverings,  exterior body
work,  repainting and re-decaling the exterior and service to the expanding wall
slide- outs.  During the time a trailer is being  refurbished,  the  Partnership
would likely rent a replacement mobile  lithotripter from the General Partner or
one of its  Affiliates at an estimated per month rate of $35,000.  Any necessary
trailer  maintenance  is likely to be  performed  by an Affiliate of the General
Partner at customary rates. See  "Compensation  and Reimbursement to the General
Partner and its  Affiliates." In addition,  in 1999 the General Partner plans to
replace the three oldest  tractors  with used  tractors at an estimated  cost of
approximately   $40,000  per  tractor.  The  General  Partner  also  anticipates
replacing at least one of the remaining tractors in 2000.

Operation of the Mobile Lithotripsy Systems

     It is anticipated  that the Partnership  will continue to provide  services
under the Hospital Contracts and, where possible, enter into similar lithotripsy
service   agreements  with  other  hospitals  and  outpatient   surgery  centers
throughout  the Service  Area.  See "Risk  Factors - Operating  Risks - Contract
Terms and  Termination."  The  services  offered  by the  Partnership  under the
Hospital  Contracts  will be "wholesale" in nature,  i.e. the  Partnership  will
primarily supply the lithotripter,  certain  personnel and maintenance  services
for a per procedure fee. The Contract


                                      -36-
<PAGE>

Hospitals are solely  responsible for billing and collecting on their own behalf
the technical component of the lithotripsy procedure.

     It is anticipated that the Partnership will have a Physician Advisory Board
consisting of five physician Limited Partners  appointed by the General Partner.
The  Physician  Advisory  Board will meet two to four  times per year,  and each
member of the  Physician  Advisory  Board will receive a fee of $250 per meeting
attended. In addition, it is anticipated that the General Partner will appoint a
local Medical Director at a cost to the Partnership of approximately $60,000 per
year. After  consultation  with the Medical Director and the Physician  Advisory
Board,  the Management  Agent will determine the travel  itinerary of the Mobile
Lithotripsy  Systems. See "Proposed Activities - Management and Administration."
The travel  schedule is expected to be influenced by the scheduling  obligations
under the Hospital Contracts,  the number of treating physicians and patients in
particular  areas  and  Partnership  arrangements  with  any new  hospitals  and
outpatient  surgery  centers  located in the Service Area.  The General  Partner
anticipates  the  Partnership  will be able to  obtain  new pad site  space  and
utility  hook-ups at little or no charge from any local  hospitals  and surgical
centers  which enter into new  arrangements  with the  Partnership.  The General
Partner,  in its  sole  discretion,  has the  authority  to  expand  Partnership
lithotripsy operations throughout, and outside of, the Service Area.

     The General Partner anticipates that, over time, technical innovations that
make lithotripsy  simpler and less costly will put downward pressure on the fees
the  Partnership  charges for its services.  A 2,000 page report released by the
Health Care  Financing  Agency  indicates  that the  professional  component  of
Medicare payments for lithotripsy procedures may soon be greatly reduced because
of the relative  simplicity  and risk-free  nature of the  procedure.  See "Risk
Factors  -   Operating  Risks  -  Dependence  on  Insurance  Reimbursement"  and
"Regulation."

Funding for Partnership Activities

     The  General   Partner   intends   that   funding  for  the   Partnership's
refurbishment   of  three  trailers  and  acquisition  of  three  used  tractors
(including  payment of the applicable use and sales taxes) and the Partnership's
start-up,  syndication,  Asset  Contribution,  organization  and working capital
expenses  will come  primarily  from the cash  proceeds  of this  Offering.  The
proceeds of this Offering cannot be accurately  determined until the Closing has
occurred and the number of Units sold has been calculated.  If fewer than all 80
Units are sold,  such  proceeds may not be  sufficient  to fund all  anticipated
expenses. The General Partner anticipates funding any shortfall with Partnership
Cash Flow  and/or the  proceeds of  indebtedness  as  determined  by the General
Partner. See "Risk Factors - Operating Risks - Partnership Limited Resources and
Risks of Leverage," "Proposed Activities - Anticipated Capital Expenditures" and
"Sources and Application of Funds."

     The  Partnership  has  no  commitment  from  any  lender  to  provide  debt
financing,   although   Affiliates   of  the  General   Partner   maintain  good
relationships with certain commercial lenders. There is no assurance that a loan
would be  available  at the time,  in an amount and on terms  acceptable  to the
Partnership.  The  General  Partner  and/or  its  Affiliates  may,  but  are not
obligated to, lend money to the Partnership, and it cannot be determined at this
time if they would be willing


                                      -37-
<PAGE>

and able to do so on terms acceptable to the  Partnership.  Any advances made by
the General  Partner or an  Affiliate to the  Partnership  will not obligate the
General  Partner,  any such  Affiliate  or any other  Affiliate  of the  General
Partner to make future advances to the Partnership. The Partnership may not make
loans  to the  General  Partner  or any of  its  Affiliates.  Borrowings  by the
Partnership  must be  used  solely  for  the  benefit  of the  Partnership.  See
"Conflicts of Interest."

     While the  General  Partner  does not  anticipate  that it would  cause the
Partnership  to  incur  indebtedness  unless  cash  generated  from  Partnership
operations  were at the  time  expected  to  enable  repayment  of such  loan in
accordance with its terms,  lower than anticipated  revenues and/or greater than
anticipated expenses could result in the Partnership's  failure to make payments
of principal or interest when due under such a loan and the Partnership's equity
being reduced or  eliminated.  In such event,  the Limited  Partners  could lose
their entire investment. See "Risk Facors - Operating Risks, Partnership Limited
Resources and Risks of Leverage" and the Financial  Projections attached to this
Memorandum as Appendix A.

Acquisition of Additional Assets

     Pursuant  to  the  Partnership  Agreement,  the  General  Partner  has  the
authority  at any time  (without  obtaining  the Limited  Partners'  consent) to
establish  reserves or borrow  additional  funds on behalf of the Partnership to
acquire one or more fixed base or Mobile Lithotripsy Systems (or any other renal
stone  treatment  equipment),  and may use  Partnership  assets and  revenues to
secure and repay such  borrowings.  The  acquisition of such assets likely would
result in higher operating costs for the Partnership. Except as provided herein,
the General Partner does not anticipate acquiring additional  Partnership assets
unless projected  Partnership Cash Flow or proceeds from a Dilution Offering are
sufficient to finance such acquisitions. See "Sources and Application of Funds."
No Limited Partner would be personally  liable on any  Partnership  indebtedness
without such Limited Partner's prior written consent. There is no assurance that
financing would be available to the Partnership to acquire  additional assets or
to  fund  any  additional  working  capital  requirements.   A  default  by  the
Partnership  under  any such loan  could  severely  and  negatively  impact  the
Partnership. See "Risk Factors - Operating Risks - Partnership Limited Resources
and Risks of Leverage."

Management and Administration

     Management Fee. Pursuant to the Management Agreement, the Management Agent,
an Affiliate of the General  Partner,  will  contract  with the  Partnership  to
supervise and coordinate the  management  and  administration  of the day-to-day
operations  of the Mobile  Lithotripsy  Systems  for a monthly  fee equal to the
greater of $8,000 or 7.5% of Partnership Cash Flow per month. See  "Compensation
and  Reimbursement  to the General  Partner and its  Affiliates" and "Management
Agent."  The  General  Partner  may,  in  its  sole  discretion,  engage  at the
Partnership's   expense  one  or  more  local   Medical   Directors  to  provide
consultation  regarding  patient  needs and  treatment.  It is expected that one
medical  director will be engaged at an annual  estimated  cost of $60,000.  All
costs  incurred  by the  Management  Agent in  performing  its duties  under the
Management Agreement will be the responsibility of, and will be paid directly or
reimbursed to the Manager by the Partnership.


                                      -38-
<PAGE>

The Management Agent is the management agent for various affiliated  lithotripsy
ventures.  As a  consequence,  many  of its  employees  provide  management  and
administrative  services for numerous  ventures,  including the Partnership.  In
order to properly  allocate the costs of the  Management  Agent's  employees and
other overhead expenses among the entities for which they provide services, such
costs will be divided  among them  based upon the  relative  number of  patients
treated by each.  The General  Partner  believes  that the sharing of Management
Agent personnel costs among the various ventures will result in significant cost
savings for the Partnership.

     Management Duties.  Investors are urged to review carefully the form of the
Management Agreement, a copy of which is attached as Appendix D.  The Management
Agent's  services  under the  Management  Agreement  generally  will include the
provision of lithotripsy  related  services,  housekeeping,  laundry,  equipment
maintenance,  medical and office supply inventory and other incidental  services
necessary for efficient operation of the Mobile Lithotripsy Systems, as well as,
the  supervision  and  coordination  of any  necessary  lithotripsy  training of
qualified  physicians  and the continuing  education of qualified  physicians in
lithotripsy  techniques.  The  Management  Agent  will also be  responsible  for
implementing  and overseeing  the  Partnership's  quality  assurance and outcome
analysis  programs.  In addition,  the Management Agent will employ on behalf of
the Partnership all  nonphysician  personnel  reasonably  necessary to staff and
operate the Mobile Lithotripsy Systems, including, without limitation,  drivers,
lithotripsy technicians,  nurses,  secretary/receptionists  and office managers.
All such personnel will be the employees and the financial responsibility of the
Partnership,   and  the  Management   Agent  may  increase  or  decrease  Mobile
Lithotripsy  System  personnel to the extent the Management Agent deems it would
benefit the Partnership's  operations.  See "Proposed Activities - Employees and
Benefits" below. The Management Agent generally will also be responsible for the
billing and collection of Contract Hospital accounts.

     The Management  Agent's  engagement by the Partnership under the Management
Agreement will be as an independent contractor,  and neither the Partnership nor
its  Limited  Partners  will have any  authority  or control  over the method or
manner in which  the  Management  Agent  performs  its  duties  pursuant  to the
Management  Agreement.  The Management  Agreement vests in the Management  Agent
full operational  control of all aspects of management and administration of the
Mobile  Lithotripsy  Systems.  The term of the Management  Agreement is for five
years and will be  automatically  renewed for up to three  successive  five-year
terms unless terminated by the Partnership or the Management Agent.

     In order for the  Partnership to be responsive to the concerns of the local
physicians  who will use its Mobile  Lithotripsy  Systems,  the General  Partner
expects to appoint a local  Medical  Director  (or  Directors)  and a  Physician
Advisory Board made up of representative  local physicians.  The General Partner
will  consult  with the  Physicians  Advisory  Board  from  time to time on such
matters as  instituting  its detailed  quality  assurance  program,  utilization
review,  outcome analysis and patient  scheduling.  The fees and expenses of the
Medical Director and the Physician  Advisory Board will be the responsibility of
the Partnership.  See "Proposed Activities - Operation of the Mobile Lithotripsy
Systems."



                                      -39-
<PAGE>

     Except  as  otherwise   provided  below,   the  Management  Agent  will  be
responsible  for  maintaining  on behalf of the  Partnership  complete books and
records for the  management of the Mobile  Lithotripsy  Systems.  The Management
Agreement  provides  that all funds  furnished  by the  Partnership  as  working
capital together with all Partnership revenues will be accounted for separately.
Such  funds  will  be  disbursed  by  the  Management  Agent  on  behalf  of the
Partnership  to pay all  expenses  associated  with the  operation of the Mobile
Lithotripsy Systems,  including,  without limitation, the management fee payable
to the Management Agent under the Management Agreement and reimbursements to the
General Partner and the Management  Agent for all of their  out-of-pocket  costs
incurred in the  operation of the Mobile  Lithotripsy  Systems.  The  Management
Agent and its  Affiliates  will  receive no  compensation  under the  Management
Agreement other than its management fee and  reimbursement for its out-of-pocket
costs  incurred  in  fulfilling  its  responsi  bilities  under  the  Management
Agreement.

     Consultation  and Education.  The local Medical  Director will  communicate
regularly with officers of the Management  Agent,  who will remain available for
consultation by phone and who plan to regularly visit all the Mobile Lithotripsy
Systems. The Management Agent will continually monitor progress in technological
developments in renal  lithotripsy and advise the Partnership and the physicians
who  use  the  Partnership's   lithotripters   regarding  the  nature  of  these
developments and its recommended course of action.

     Employees and Benefits. The General Partner currently employs 11 employees.
The Partnership anticipates that it will continue to employ such employees.  All
active  full-time  employees of the  Partnership  are eligible to participate in
Prime's  benefit  plans.  Prime  provides  group  medical,   dental,   long-term
disability,  accidental  death and  dismemberment  and life insurance  benefits.
Through  its  cafeteria  plan,  Prime  provides  eligible   employees  with  the
opportunity to pay premiums for coverage under such group  insurance  plans on a
pre-tax basis and to receive reimbursement for certain qualifying dependent care
and medical expenses. In addition,  Prime sponsors a 401(k) retirement plan that
allows eligible  employees to save for their retirement on a pre- tax basis and,
in the discretion of Prime, to receive matching  contributions on their savings.
The Partnership likely will also provide paid holidays, sick leave, and vacation
benefits  and  other  miscellaneous  benefits  including  bereavement,  military
reserves, jury duty and educational assistance benefits. Finally, for 1998 only,
certain  employees  of the  Partnership  may be eligible to receive an incentive
bonus based on their performance.

Financial Projections

     Investors are urged to review the  Financial  Projections  and  assumptions
thereto attached as Appendix A.  The Financial Projections contain data supplied
by the  General  Partner  that is based upon the General  Partner's  estimate of
reasonable,  but  not  necessarily  the  most  likely,  results  of  Partnership
operations. The data in the Financial Projections includes the General Partner's
estimate of projected Unit sales,  Partnership  expenses and revenues,  and also
assumptions regarding the anticipated number of lithotripsy procedures that will
be performed at the Mobile Lithotripsy  Systems each year. Because the Financial
Projections represent a prediction of future events based on certain assumptions
that may or may not occur, Investors should not rely on the


                                      -40-
<PAGE>

Financial  Projections  as an  indication  of the  actual  results  that will be
attained.  Some  assumptions  inevitably will not materialize and  unanticipated
events  and  circumstances  may occur  subsequent  to the date of the  Financial
Projections.  The actual  results  achieved  during  the  period  covered by the
Financial  Projections will vary from the projected results and these variations
may be  material.  Furthermore,  no  assurance  can be given that the results of
current or future operations will favorably compare with the historical  results
of the  Business.  See  "Risk  Factors  - Other  Investment  Risks  -  Financial
Projections" and the Financial  Projections (with  accompanying  assumptions and
notes)  attached  hereto as  Appendix A.  A significant  increase in competition
would also  adversely  impact  proposed  Partnership  operations.  See "Proposed
Activities - History of the Business."


                       FINANCIAL CONDITION OF THE BUSINESS

Selected Financial Data of the Business

     The selected  financial data of the Business set forth below should be read
in conjunction with the Financial  Statements of the Business attached hereto as
Exhibit F and "Management's  Discussion and Analysis of Financial  Condition and
Results of Operations of the Business" below.  All the financial  statements are
unaudited.


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                                                       -41-
<PAGE>

Management's  Discussion  and  Analysis of the Results of  Operations  for Prime
Lithotriper  Operations,  Inc., a New York  corporation,  d/b/a Tennessee Valley
Lithotripter

Nine Months Ended September 30, 1998 and September 30, 1997

     Revenues.  Total revenues increased $417,000 (8%) for the nine months ended
September  30, 1998  compared to the same period in 1997 related to a 7% rise in
the number of  procedures  performed,  primarily  due to the addition of two new
hospitals, and a less than 1% rise in revenue per case.

     Operating  Expenses.  Operating expenses declined by $172,000 (12%) for the
nine months ended  September 30, 1998  compared to the same period in 1997.  The
decline is  related  to:  (1)  certain  expenses  totaling  $105,000  (primarily
compensation  and travel)  related to the  management of the office in Nashville
have been excluded from the 1998 amounts due to a restructuring of operations by
Prime Medical in late 1997, and (2) a decline in depreciation  and  amortization
expenses of $90,000,  which is attributable to certain  equipment  having become
fully depreciated resulting in lower depreciation expense in 1998, (3) equipment
maintenance and repairs declined $40,000 due to favorable renewal of maintenance
contracts on the lithotripter equipment.  Offsetting the above listed reductions
was a $81,000  increase in other  operating  expenses which is  attributable  to
increased costs to handle the increase in procedures performed.

     Other Income (Expense). Other income, net increased by $7,000 (185%) due an
increase in interest and other income.

Year Ended December 31, 1997 and December 31, 1996

     Revenues.  Total  revenues  increased  $741,000  (12%)  for the year  ended
December 31,  1997  compared to the same period in 1996  related to a 8% rise in
the  number of  procedures  performed,  primarily  due to higher  procedures  at
existing hospitals, and a 4% rise in revenue per case.

     Operating  Expenses.  Operating expenses decreased by $7,000 (less than 1%)
for the year ended  December 31, 1997  compared to the same period in 1996.  The
decline  is  related  to  (1)  an  increase  of  $104,000  in  the  intercompany
lithotripter rental expense,  which permitted the Business to provide additional
service  to its  existing  hospitals  and (2)  $70,000  in  expenses  (primarily
compensation  and travel) to manage the Business and other  businesses  owned by
the  Affiliates  of the General  Partner have been excluded in the 1997 amounts.
This was partially offset by a decline in depreciation and amortization expenses
of $34,000,  which is  attributable  to certain  equipment  having  become fully
depreciated.

     Other Income (Expense).  Other income, net increased by $400 (9%) due to an
increase in interest and other income.



                                      -42-
<PAGE>

Year Ended December 31, 1996 and December 31, 1995

     Revenues.  Total  revenues  increased  $667,000  (12%)  for the year  ended
December 31,  1996 compared to the same period in 1995, related to a 14% rise in
the number of procedures  performed,  primarily  due to 2 contracts,  which were
entered into in mid-1995,  had a full year of activity in 1996, and a 2% decline
in revenue per case.

     Operating  Expenses.  Operating expenses increased by $105,000 (5%) for the
year ended  December  31, 1996  compared  to the same period in 1995,  due to an
increase of $86,000 in the  employee  compensation  and  benefits  related to an
increase in staff.

     Other Income (Expense). Other income, net increased by $3,000 (561%) due to
an increase in interest and other income.


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                                      -43-
<PAGE>

                        SOURCES AND APPLICATIONS OF FUNDS

     The  following  table sets forth the funds  expected to be available to the
Partnership  from this  Offering if all 80 Units are sold and other  sources and
their anticipated and estimated uses.


    Sources of Funds                            Sale of 80 Units
Offering Proceeds(1)                               $729,120            (100.00%)
                 --                                --------            -------  
   TOTAL SOURCES                                   $729,120            (100.00%)
                   Application of Funds
Refurbishment of Three Trailers(2)                 $195,000           (  26.74%)
Purchase of Three Used Tractors(2)                 $120,000           (  16.46%)
Loaner Rental Costs(2)                             $210,000           (  28.80%)
Organizational Start-Up Costs and Working          $139,120           (  19.08%)
Capital(3)
Syndication Costs(4)                               $ 65,000           (   8.91%)
                 --                                --------           -   ----  
   TOTAL APPLICATIONS                              $729,120           ( 100.00%)
                                                   ========           = ======  


Notes to Sources and Applications of Funds Table

     (1) Assumes all 80 Units are purchased by qualified Investors.  In addition
to  the  cash  proceeds  of the  Offering,  the  Partnership  will  acquire  the
Contributed Assets from the General Partner.

     (2) It is anticipated  that the General  Partner will cause the Partnership
to  contract  with AK  Associates,  an  Affiliate  of the  General  Partner,  to
refurbish the  Partnership's  three oldest  trailers at an estimated per trailer
cost of $65,000. In connection with the refurbishments, the General Partner will
also cause the  Partnership  to purchase three used tractors at an estimated per
vehicle cost of $40,000. During the time of each refurbishment (estimated at 6 -
8 weeks),  the General  Partner  will cause the  Partnership  to rent a "loaner"
trailer-lithotripter  unit at an estimated per month cost of $35,000.  The table
assumes that each refurbishment will take two months. See "Proposed Activities -
Anticipated   Partnership   Expenditures"   and  "-  Funding   for   Partnership
Activities."

     (3) This amount  includes the General  Partner's  estimate of (i) legal and
accounting  costs  associated  with  organizing the  Partnership,  preparing the
Partnership Agreement,  the Management Agreement and other ancillary Partnership
documents;  (ii) all out-of-pocket  expenses incurred by the General Partner and
its Affiliates associated with the initial start-up of the


                                      -44-
<PAGE>

     Partnership's operations;  (iii) legal and accounting costs associated with
the Asset  Contribution  and (iv)  working  capital  needs.  To the  extent  the
proceeds of the Offering are  insufficient  to fund the foregoing  costs or such
costs exceed the estimated amounts, it is anticipated that Partnership Cash Flow
and/or  the  proceeds  of debt  financing  will  fund  such  costs.  There is no
assurance  that  Partnership  Cash Flow or debt  financing will be available for
such  purpose.  See  "Risk  Factors  -  Operating  Risks -  Partnership  Limited
Resources and Risks of Leverage."

     (4)  Includes   $20,000  in   commissions   payable  to  the  Sales  Agent,
reimbursement of $15,000 to the Sales Agent for out-of-pocket  expenses incurred
in selling the Units and $30,000 in legal and accounting  costs  associated with
the preparation of this Memorandum.


                      COMPENSATION AND REIMBURSEMENT TO THE
                       GENERAL PARTNER AND ITS AFFILIATES

     The following  summary  describes the types and,  where  determinable,  the
estimated amounts of reimbursements, compensation and other benefits the General
Partner and its  Affiliates  will receive in connection  with the  organization,
operation and management of the Partnership and the Mobile Lithotripsy  Systems.
None of such fees,  compensation and other benefits has been determined at arm's
length.  Except for the items set forth  below,  the  General  Partner  does not
expect to receive any distribution, fee, compensation or other remuneration from
the Partnership.  See "Proposed  Activities - Management and Administration" and
"Plan of Distribution."
 
     1. Partnership  Interest.  Provided the necessary consents and releases are
obtained under the Contribution  Agreement,  the General Partner will contribute
the  Contributed  Assets to the  Partnership in exchange for at least an initial
80% General Partner interest in the Partnership.  See "Proposed Activities - The
Asset  Contribution."  The  Percentage  Interest  of the  General  Partner  will
increase by 0.25% for each unsold Unit.  There is no assurance that the value to
be received by the General Partner in connection with the Asset  Contribution is
fair to the Investors.

     2. Organizational  Expenses.  The General Partner will be reimbursed by the
Partnership for all its out-of-pocket  costs associated with the organization of
the Partnership,  the Asset  Contribution and all expenses of this Offering.  No
other  fees or  compensation  will be  payable  to the  General  Partner  or its
Affiliates,  except for the Management Fee and related reimbursements (described
below), for managing the Partnership.

     3. Management  Fee.  Pursuant to the Management  Agreement,  the Management
Agent will  contract  with the  Partnership  to  supervise  the  management  and
administration  of the day-to-day  operations of the  Partnership's  lithotripsy
business for a monthly fee equal to the greater of $8,000 or 7.5% of Partnership
Cash Flow per month.  All costs incurred by the  Management  Agent in performing
its duties under the  Management  Agreement will be the  responsibility  of, and
will be paid directly or reimbursed by, the Partnership. The Management Agent is
the  management  agent  for  various  affiliated   lithotripsy  ventures.  As  a
consequence, many of the Management


                                                       -45-
<PAGE>

Agent's employees  provide various  management and  administrative  services for
numerous ventures,  including the Partnership. In order to properly allocate the
costs of the Management  Agent's employees and other overhead expenses among the
entities for which they provide  services,  such costs will be divided among all
the ventures  based upon the relative  number of patients  treated by each.  The
General  Partner  believes  that the sharing of  personnel  costs among  various
entities results in significant costs savings for the Partnership. Investors are
urged  to  review  carefully  the  Management  Agreement,  the  form of which is
attached  hereto as  Appendix D.  The management fee for any given month will be
payable on or before the 30th day of the next succeeding month and will begin to
accrue  immediately  following  the  Closing  Date.  The term of the  Management
Agreement is for five years, and will be  automatically  renewed for up to three
successive   five-year  terms  unless  terminated  by  the  Partnership  or  the
Management  Agent.  The  Management  Agent  and  the  General  Partner  will  be
reimbursed by the Partnership for all of their  out-of-pocket  costs  associated
with the operation of the Partnership and the Mobile  Lithotripsy  Systems,  and
the  Partnership  will pay or  reimburse  to the General  Partner  all  expenses
related to the organization of the Partnership,  the Asset Contribution and this
Offering.  No other fees or compensation  will be payable to the General Partner
or its  Affiliates  for managing the  Partnership  other than the management fee
payable to the  Management  Agent as provided in the Management  Agreement.  The
Partnership may, however, contract with the General Partner or its Affiliates to
render other services or provide materials to the Partnership  provided that the
compensation  is at the then  prevailing  rate for the type of  services  and/or
materials provided.

     4.  Partnership  Distributions.  In its capacity as general  partner of the
Partnership,  the  General  Partner is entitled  to its  distributable  share of
Partnership Cash Flow,  Partnership  Sales Proceeds and Partnership  Refinancing
Proceeds as provided by the Partnership Agreement.  Although neither the General
Partner nor its Affiliates intend to purchase Units in this Offering, they would
also  receive  Partnership  Distributions  in  respect  of any  Limited  Partner
Partnership  Interests they hereafter acquire.  The amount of such Distributions
to the General Partner,  if any, cannot be determined at this time. See "Summary
of the Partnership Agreement - Profits, Losses and Distributions," the Financial
Projections  attached as Appendix A  and the form of the  Partnership  Agreement
attached as Appendix B.

     5. Sales Commissions.  The Sales Agent, a wholly-owned subsidiary of Prime,
has entered into a Sales Agency Agreement with the Partnership pursuant to which
the Sales  Agent has  agreed  to sell the Units on a "best  efforts"  any or all
basis.  As  compensation  for its  services,  the  Sales  Agent  will  receive a
commission equal to $250 for each Unit sold (up to an aggregate of $20,000).  If
the  offering  is  successful,  the Sales Agent will also be  reimbursed  by the
Partnership for its out-of-pocket expenses associated with its sale of the Units
in an amount not to exceed $15,000. See "Plan of Distribution" and "Conflicts of
Interest."

     6.  Refurbishment  of Trailers.  It is anticipated that the General Partner
will cause the  Partnership to contract with AK Associates,  an Affiliate of the
General Partner,  to refurbish three of the  Partnership's  trailers in 1999 and
the Partnership's two remaining trailers in 2000 and 2001,  respectively,  at an
estimated per trailer cost of $65,000.  In addition,  it is anticipated that the
General  Partner will cause the  Partnership to contract with  Affiliates of the
General Partner to rent


                                      -46-
<PAGE>

"loaner"  trailer-lithotripter  units during the time the Partnership's trailers
are being  refurbished  at an  estimated  per month  price of $35,000  per unit.
Refurbishment  is  expected  to take  six to  eight  weeks.  Accordingly,  it is
anticipated that the Partnership will pay an aggregate of $350,000 to Affiliates
of the  General  Partner  for  loaner  units  over the  next  three  years.  The
Partnership may require  additional loaner units or rental time in the event any
of the Partnership's Mobile Lithotripsy Systems experience substantial down time
for other  maintenance  or  repairs.  See  "Proposed  Activities  -  Anticipated
Partnership Expenditures."

     7. Loans.  The General Partner or its Affiliates will also receive interest
on loans, if any, made by them to the Partnership.  See "Conflicts of Interest."
Neither the General Partner nor any of its Affiliates are, however, obligated to
make loans to the  Partnership.  While the General  Partner does not  anticipate
that it would cause the Partnership to incur indebtedness  unless cash generated
from  Partnership  operations  were at the time expected to enable  repayment of
such loan in accordance with its terms,  lower than anticipated  revenues and/or
greater than anticipated  expenses could result in the Partnership's  failure to
make  payments  of  principal  or  interest  when due under  such a loan and the
Partnership's  equity being reduced or  eliminated.  In such event,  the Limited
Partners could lose their entire investment. See "Risk Factors - Operating Risks
- - -  Partnership  Limited  Resources  and  Risks of  Leverage"  and the  Financial
Projections attached to this Memorandum as Appendix A.


                                 GENERAL PARTNER

     The General  Partner of the Partnership is Prime  Lithotripter  Operations,
Inc., a New York corporation and wholly-owned  subsidiary of Prime (the "General
Partner"). Prime is a publicly held company engaged in the ownership,  operation
and management of medical service and related ventures.  The principal executive
office of the  General  Partner  is located at 1900  Church  Street,  Suite 101,
Nashville, Tennessee 37203. The General Partner's assets are illiquid in nature.
Upon the Closing, the primary assets of the General Partner will be its interest
in the Partnership. The General Partner also has substantial potential financial
exposure as a guarantor of certain Prime indebtedness.

     Management.  The  following  table  sets  forth the  names  and  respective
positions  of the  individuals  serving as the  executive  officers and the sole
director of the General Partner,  many of whom are current management  personnel
of Prime.

                       Name                         Office
                       ----                         ------

                  Joseph Jenkins, M.D.              President
                  Cheryl Williams                   Treasurer and sole Director
                  Thomas J. Driber, Ph.D.           Vice President
                  James Clark                       Secretary



                                      -47-
<PAGE>

     Descriptions of the background of the key executive  officers and directors
of the General Partner appear below.

     Joseph Jenkins, M.D. was recently elected President of the General Partner.
Dr. Jenkins has been President and Chief Executive of the Management Agent since
April 1996.  From May 1990 until December 1991, Dr. Jenkins was a Vice President
of the Management Agent and previously  practiced  urology in Washington,  North
Carolina.  Dr. Jenkins has been President of the Management Agent since 1992 and
was recently elected to is Board of Directors.  Dr. Jenkins is a board certified
urologist and is a founding member, the immediate past-president and currently a
Director of the American Lithotripsy Society.

     Cheryl Williams is the sole Director and Treasurer of the General  Partner.
Ms.  Williams also is a Vice President and Director of the Management  Agent and
has been Chief Financial Officer, Vice  President-Finance and Secretary of Prime
since   October 1989.   Ms.  Williams  was  Controller  of  Fairchild   Aircraft
Corporation from August 1988 to  October 1989.  From 1985 to 1988,  Ms. Williams
served as the Chief  Financial  Officer of APS Systems,  Inc. Ms.  Williams also
serves as the sole Director and Treasurer of the General Partner.

     Thomas J. Driber,  Ph.D.  has been Vice  President  of the General  Partner
since 1994. Dr. Driber is an  experienced  medical  practice  consultant and has
served as a director of Southern Medical Imaging, Inc. (1988-1993), First Choice
Health Plan, Inc.  (1986-1988) and Tampa Bay Health Plan, Inc.  (1985-1986).  In
addition,  Dr. Driber is an accomplished health care scholar and was a member of
the teaching faculty at Florida Neurological  Institute School of EEG Technology
from 1980 to 1984.  Dr.  Driber  received a faculty  appointment  to the Surgery
department  (renal  transplant  surgery) of the University of Florida College of
Medicine  and taught there from 1977 to 1979.  Dr.  Driber  received a Ph.D.  in
Medical/Social Change Theory, Concentration: Ambulatory Medical Delivery Systems
from Walden University, Institute for Advanced Studies in Minneapolis, Minnesota
in 1984.

     James Clark has been  Secretary of the General  Partner  since  January 30,
1998. He is currently  tax manager and Secretary or Assistant  Secretary for the
majority of Prime's  subsidiaries.  Prior to January 30, 1998, he was controller
in ERISA Administration Services, a privately held company.


                                MANAGEMENT AGENT

     The  Management  Agent  of the  Company  is  Lithotripters,  Inc.,  a North
Carolina  corporation  formed in November 1987 for the purpose of sponsoring and
managing medical service limited partnerships and limited liability companies in
the United States (the "Management  Agent"). The Management Agent was founded by
William R. Jordan,  M.D. and on April 26, 1996 became a wholly-owned  subsidiary
of Prime.  The principal  executive office of the Management Agent is located at
2008 Litho Place,  Fayetteville,  North  Carolina  28304 and its phone number is
(800) 682- 7971.  The  Management  Agent's  assets are  illiquid in nature.  The
primary  assets of the  Management  Agent  are  partnership  interests  in other
lithotripsy entities.

     Management.  The  following  table  sets  forth the  names  and  respective
positions of the individuals  serving as executive officers and directors of the
Management  Agent,  many of whom were shareholders of the Management Agent prior
to its acquisition by Prime and/or are current  shareholders  and/or  management
personnel of Prime.

                     Name                     Office
                     ----                     ------
                  Joseph Jenkins, M.D.     President, Chief Executive Officer
                                              and Director
                  Kenneth S. Shifrin       Director
                  W. Alan Terry            Chief Financial Officer
                  Cheryl Williams          Vice President and Director
                  Philip J. Gallina        Secretary and Treasurer

     Supervision  of  the  day-to-day   management  and  administration  of  the
Partnership will be the  responsibility  of the Management Agent. The Management
Agent itself is managed by a  three-member  Board of  Directors  composed of Dr.
Jenkins,  Mr. Shifrin and Ms.  Williams.  The Management Agent is a wholly-owned
subsidiary of Prime.

     Descriptions of the background of the key executive  officers and directors
of the Management Agent appear below or under "General Partner."

     Kenneth S.  Shifrin has been  Chairman of the Board and a Director of Prime
since October 1989 and was recently  elected a Director of the Management  Agent
following  Prime's  acquisition  of all of the  Management  Agent's  stock.  Mr.
Shifrin also has served in various  capacities with American  Physicians Service
Group, Inc. ("APS") since February 1985, and is currently  Chairman of the Board
and Chief Executive Officer of APS.

     W. Alan Terry has been Chief  Financial  Officer  of the  Management  Agent
since 1991. In August,  1986, Mr. Terry joined The May Department Stores Company
at their corporate  headquarters in St. Louis,  where he held several  financial
management  positions  until October,  1987,  when he was  transferred to one of
May's largest divisions, Caldor, Inc., as Vice President of Finance. He remained
in that capacity until June,  1990, when he became Chief  Operating  Officer for
the Management Agent and served in that capacity until April 1996.

     Philip J.  Gallina  recently  became the  Secretary  and  Treasurer  of the
Management  Agent,  having previously served as a Vice President since 1989. Mr.
Gallina is a Certified Public Accountant  licensed in the state of Pennsylvania.
From 1980 through  February 1989, Mr. Gallina served as Plant Controller for the
Westinghouse  Motor Control and Enclosed  Control Product Lines.  Mr. Gallina is
also a Director, the Vice President,  the Treasurer and the Secretary of MedTech
Investments, Inc., the Sales Agent.


                                      -48-
<PAGE>

                              CONFLICTS OF INTEREST

     The  organization  and  operation  of  the  Partnership   involve  numerous
conflicts of interest  between the Partnership and the General Partner and their
Affiliates.  Because the  Partnership  will be operated by the General  Partner,
such  conflicts  will not be resolved  through  arm's length  negotiations,  but
through the exercise of the judgment of the General Partner  consistent with its
fiduciary   responsibility   to  the  Limited  Partners  and  the  Partnership's
investment objectives and policies.  The General Partner, its Affiliates and its
employees will in good faith attempt to resolve potential  conflicts of interest
with the  Partnership,  and the  General  Partner  will act in a manner  that it
believes to be in or not opposed to the best interests of the Partnership.

     The Management  Agent and the Sales Agent,  both  Affiliates of the General
Partner,  will receive  management  fees and  broker-dealer  sales  commissions,
respectively,  in  connection  with  the  sale of the  Units  that  will be paid
regardless of whether any sums are distributed to Limited Partners. None of such
fees,   compensation   and  benefits  has  been   determined   by  arm's  length
negotiations. In addition, the Partnership may contract with the General Partner
or its  Affiliates to render  services or provide  materials to the  Partnership
provided that the  compensation  is at the then  prevailing rate for the type of
services and/or materials provided.  It is anticipated that the Partnership will
pay  substantial  amounts  of money to  Affiliates  of the  General  Partner  in
connection with the  refurbishment of the  Partnership's  trailers.  The General
Partner  will  also  receive  interest  on  loans,  if  any,  it  makes  to  the
Partnership.  See "Compensation and Reimbursement to the General Partner and its
Affiliates."

     The General  Partner and its  Affiliates,  including the Management  Agent,
will devote as much of their time to the business of the Partnership as in their
judgment is  reasonably  required.  Principals  of the General  Partner may have
conflicts of interest in  allocating  management  time,  services and  functions
among their various existing and future business activities in which they are or
may become  involved.  See  "Competition"  and "Prior  Activities."  The General
Partner believes it and its Affiliates,  together,  have sufficient resources to
be  capable of fully  discharging  the  General  Partner's  and its  Affiliates'
responsibilities to the Partnership.  The General Partner and its Affiliates may
engage for their own account,  or for the account of others,  in other  business
ventures,  related to medical services or otherwise, and neither the Partnership
nor the holders of any of the Units shall be entitled to any  interest  therein.
The General Partner, its Affiliates (including affiliated limited partnerships),
and their employees  engage in medical related service  activities for their own
accounts.  See "Prior  Activities."  The  Management  Agent  serves as a general
partner and/or  management agent of other limited  partnerships that are similar
to the Partnership and does not intend to devote its entire financial, personnel
and other resources to the Partnership.  Except as provided by law, none of such
entities or their  respective  Affiliates  is  prohibited  from  engaging in any
business or arrangement that may be in competition  with the Partnership.  Also,
Affiliates of the General Partner act as general partners of competing  ventures
in Arkansas and Kentucky and are planning  other limited  partnership  offerings
that would operate lithotripsy businesses in other states. See "Competition" and
"Prior Activities."



                                      -49-
<PAGE>

     The Management Agent or its Affiliates closed on twenty-three other limited
partnership  offerings for partnerships which respectively  operate in (i) North
Carolina,  (ii) Utah,  Idaho,  Wyoming and Nevada,  (iii) in  southwestern North
Carolina and northwestern South Carolina, (iv) in eastern South Carolina, (v) in
Arizona,  (vi) in  Louisiana and Texas,  (vii) in  Virginia and North  Carolina,
(viii) in  Arkansas,  (ix) in the San Diego,  California area, (x) in Tennessee,
(xi) in the Orange County,  California  area,  (xii) in the  southeastern  Texas
area,  (xiii) in the south central Texas area,  (xiv) in Las Vegas,  (xv) in the
Santa Barbara and Ventura,  California  area,  (xvi) in  north central  Florida,
(xvii) in  Billings,  Montana,  (xviii) in the northwestern Texas area, (xix) in
Indiana,  Kentucky and Ohio, (xx) in Colorado,  New Mexico and Wyoming, (xxi) in
Hawaii,  (xxii) in the  Austin and Round  Rock  areas of Texas,  and  (xxiii) in
Wisconsin.   The  North  Carolina   partnership   began  treating   patients  in
Fayetteville,  North  Carolina in October  1985.  The Utah,  Idaho,  Wyoming and
Nevada  limited   partnership   began  treating   patients  in  July  1989.  The
southwestern North Carolina and northwestern South Carolina limited  partnership
began  treating  patients in late August  1989 and the  eastern  South  Carolina
limited  partnership began treating patients in mid-September  1989. The Arizona
limited  partnership began treating patients in December 1989. The Louisiana and
Texas limited  partnership  began  operations in May 1990,  and the Virginia and
North  Carolina  partnership  began  operating  in  Virginia  in July 1990.  The
Arkansas  partnership  began  treating  patients  in July  1990.  The San Diego,
California  area  partnership  began  treating  patients  in January  1991.  The
Tennessee  partnership began treating patients in late April 1991 and the Orange
County,  California partnership began treating patients in early April 1991. Two
of the other Texas partnerships began lithotripsy operations in August 1991. The
Indiana,  Kentucky and Ohio partnership  began treating patients in May 1991 and
the Santa Barbara and Ventura, California partnership began treating patients in
August 1991. The Las Vegas  partnership  began  operating in August 1991 and the
Florida  partnership in October 1991. The Billings,  Montana  partnership  began
treating  patients in August 1992.  The  northwestern  Texas  partnership  began
operations in January 1993.  The  Colorado,  New Mexico and Wyoming  partnership
began operations in July 1995. The Hawaii partnership began operations in Hawaii
last year. The Austin and Round Rock, Texas partnership  commenced operations in
October 1997 and the Wisconsin  partnership is preparing to commence  operations
in the near future.

     The Sales Agent is MedTech Investments,  Inc., which is an Affiliate of the
General  Partner.  Because of the Sales  Agent's  affiliation  with the  General
Partner,  there  are  conflicts  in the  Sales  Agent's  performance  of its due
diligence  responsibilities  under the  federal  securities  laws.  See "Plan of
Distribution."

     The interests of the Limited Partners have not been separately  represented
by independent counsel in the formulation of the transactions  described herein.
The attorneys and accountants  who have performed and will perform  services for
the  Partnership  were  retained  by the  General  Partner  and have in the past
performed  and are  expected in the future to perform  similar  services for the
General Partner and its Affiliates.




                                      -50-
<PAGE>

                 FIDUCIARY RESPONSIBILITY OF THE GENERAL PARTNER

     The General  Partner is accountable  to the  Partnership as a fiduciary and
consequently must exercise good faith in handling Partnership affairs. This is a
rapidly  developing  and changing area of the law and Limited  Partners who have
questions concerning the duties of the General Partner should consult with their
counsel.

     Under the  Partnership  Agreement,  the General  Partner and its Affiliates
will  have no  liability  to the  Partnership  or to any  Partner  for any  loss
suffered  by the  Partnership  that  arises out of any action or inaction of the
General Partner or its Affiliates if the General  Partner or its Affiliates,  in
good faith,  determined  that such course of conduct was in the best interest of
the Part nership and such course of conduct did not constitute  gross negligence
or willful  misconduct of the General  Partner or its  Affiliates.  Accordingly,
Limited  Partners will have a more limited  right of action than they  otherwise
would have absent the limitations set forth in the  Partnership  Agreement.  The
General  Partner  and its  Affiliates  will be  indemnified  by the  Partnership
against  any  losses,  judgments,  liabilities,  expenses  and  amounts  paid in
settlement of any claims  sustained by them in connection with the  Partnership,
provided  that the same  were not the  result  of gross  negligence  or  willful
misconduct on the part of the General Partner or its Affiliates.

     Insofar as indemnification  for liabilities under the Securities Act may be
permitted  to persons  controlling  the  Partnership  pursuant to the  foregoing
provisions,  the  Partnership  has been  informed that in the opinion of the SEC
such indemnification is against public policy as expressed in the Securities Act
and therefore is unenforceable.

                                   COMPETITION

     Many   competing   fixed-site   and   mobile   extracorporeal    shock-wave
lithotripters  are  currently  operating  in and around the  Service  Area.  The
competing  lithotripsy  service providers generally have existing contracts with
hospitals,  or are operated by hospitals  themselves.  The following  discussion
identifies  the existing  competitors in the Service Area, to the best knowledge
of the General Partner.

     Within the Nashville  metropolitan  area, Baptist Hospital and the Columbia
Surgery  Center on the  Centennial  Medical  Center campus  provide  lithotripsy
services.  Baptist  utilizes  two  lithotripters,  a Dornier  HM-3 and a Dornier
MFL-5000, both of which are fixed-based.  The Columbia Surgery Center utilizes a
fixed-base Dornier HM-3. In eastern  Tennessee,  Park West Hospital in Knoxville
owns and  operates a  fixed-based  Dornier  HM-3.  The  University  of Tennessee
Medical Center operates a Storz SL-20. St. Mary's Hospital in Knoxville operates
a lithotripter  (brand  unknown);  in addition,  the General Partner  believes a
group of  Knoxville-area  urologists  has  purchased a new Dornier  SubCompact S
which is  presently  based at St.  Mary's.  In northeast  Tennessee,  there is a
fixed-based unit located at Northside Regional Hospital in Johnson City believed
by the General  Partner to be a Dornier  SubCompact  S. The Johnson City area is
also served by a Dornier HM-4 mobile unit which is based in Bristol,  Tennessee.
The ownership of the unit is unknown. In western Tennessee,  an Affiliate of the
General Partner, Tennessee Lithotripters Limited


                                      -51-
<PAGE>

Partnership  I, operates a Siemens  LithostarTM in the Memphis area. It delivers
services as far east as Dyersburg,  Tennessee.  In Arkansas, an Affiliate of the
General Partner,  Fayetteville  Lithotripters  Limited Partnership - Arkansas I,
owns and operates a Siemens Lithostar on a mobile basis.

     In north Alabama, the Partnership's Service Area includes Muscle Shoals. An
Affiliate  of the General  Partner,  Alabama  Lithotripsy  Services,  operates a
mobile Doli in Huntsville, Alabama.

     In Kentucky, to the best knowledge of the General Partner,  Murray-Calloway
County Hospital in Murray and T.J. Samson Community  Hospital in Glasgow operate
fixed-base extracorporeal shock-wave lithotripters; the General Partner does not
know  the  brand  of  either  unit.  A  provider  called  Stone  Burst  services
Elizabethtown and Campbellsville,  Kentucky; the General Partner is not familiar
with more details related to this provider. An Affiliate of the General Partner,
Prime Kidney Stone Treatment,  Inc., is currently forming a lithotripsy  venture
with  investors in Kentucky that will service the central  Kentucky  area.  This
venture would compete with the  Partnership  in Somerset;  however,  the General
Partner plans to assign its contract with Lake Cumberland  Regional  Hospital in
Somerset to the new  lithotripsy  venture.  While this  assignment  will have an
adverse affect on the Partnership's  revenues,  the impact is not expected to be
material.

     There is no  assurance  that the list of  competitors  identified  above is
complete.  There may be other providers of extracorporeal  shockwave lithotripsy
services in and near the Service  Area of which the General  Partner is unaware.
Their services may adversely affect the Partnership's revenues.  Other hospitals
in and  around  the  Service  Area  may  operate  lithotripters  which  are  not
extracorporeal    shock-wave    lithotripters   but   rather   use   lasers   or
electrohydraulic  lithotripters which have not been upgraded in the same fashion
as the  lithotripters  to be  acquired  from the  General  Partner.  The General
Partner  believes  that  these  machines  are  qualitatively   inferior  to  the
Partnership's  Mobile  Lithotripsy  Systems because such machines are capable of
treating stones only in the ureter and because  anesthesia is generally required
prior to treatment.  The General  Partner  believes that the Mobile  Lithotripsy
Systems  can be used on stones  in  locations  other  than the  ureter  and that
anesthesia  is generally  not  required.  See  "Proposed  Activities - Treatment
Methods for Kidney Stone Disease."

     New competing lithotripsy operations may open in the future, or innovations
in  lithotripters  or other treatment  methods for kidney stone disease may make
the Mobile  Lithotripsy  Systems  competitively  obsolete.  See "Risk  Factors -
Operating Risk - Technological  Obsolescence." None of the General Partner,  the
Management Agent or their respective  Affiliates are prohibited from engaging in
any  business  arrangement  that may compete with the  Partnership.  There is no
assurance the  Partnership  will be able to  successfully  compete with existing
providers,  including facilities that offer traditional methods of treatment for
kidney stone  disease.  See "Proposed  Activities - Treatment  Methods of Kidney
Stone  Disease." The ability of certain former owners of the Business to compete
with General Partner had been limited under noncompetition agreements which only
recently  expired.  Whether and to what extent any of such  persons may elect to
compete with the  Partnership and the resulting  impact on proposed  Partnership
operations cannot be accurately  predicted by the General Partner. See "Proposed
Activities - History of the Business."


                                      -52-
<PAGE>

     Siemens, Dornier and other lithotripsy equipment manufacturers are under no
obligation  to the General  Partner or the  Partnership  to refrain from selling
lithotripter  systems to  urologists,  hospitals or other persons for use in the
Service Area or elsewhere. In addition,  several medical equipment manufacturers
are  expected  to  offer  lower-priced   lithotripters  for  sale,  which  could
dramatically increase the number of lithotripters in the United States, increase
competition  for  lithotripsy  procedures  and create  downward  pressure on the
prices  the  Partnership  can  charge for its  equipment.  Lithotripters  can be
obtained  from  manufacturers  other than Siemens and Dornier.  Many current and
potential  competitors  of the  Partnership,  including  hospitals  and  medical
centers, have financial resources,  staffs and facilities  substantially greater
than those of the Partnership and of the General Partner.

                                   REGULATION

Federal Regulation

     The  Partnership  will be subject to regulation  at the federal,  state and
local  level.  An  adverse  review  or  determination   by  certain   regulatory
organizations (federal,  state or private) may result in imprisonment,  fines or
exclusion from participation in Medicare or Medicaid. Therefore, adverse reviews
of the  Partnership  operations  at any of the  various  regulatory  levels  may
adversely affect the operations and profitability of the Partnership.

     Reimbursement.  As the  Partnership  will serve  primarily  as an equipment
vendor for contracting  hospitals and will not directly bill or collect from any
patients for lithotripsy services provided using its equipment,  the Partnership
will not be directly affected by changing  third-party  reimbursement  rates for
lithotripsy  services.  However,  the  Partnership's  revenues may be indirectly
affected by such reimbursement, as explained below.

     The Balanced  Budget Act of 1997  required  HCFA to establish a prospective
payment  system for  outpatient  procedures.  In that  connection,  HCFA  issued
proposed  regulations on September 8, 1998.  HCFA proposes a base rate of $2,612
for outpatient lithotripsy  procedures,  which includes anesthesia and sedation,
equipment  and supplies  necessary for the  procedure,  but does not include the
treating  physician's  professional  fee.  The base rate is  subject  to various
adjustments  depending on criteria  applicable  to each  individual  contracting
hospital.  The  proposed  regulations  state  that HCFA plans to  implement  the
outpatient  prospective  payment system sometime after January 1, 2000 (although
the Balanced Budget Act  contemplated  implementation  by January 1,  1999). The
General  Partner  believes  that  implementation  of the proposed  base rate for
lithotripsy  procedures,  which  is low,  may  have  an  adverse  effect  on the
Partnership's revenues.

     Although  the  Partnership  does  not  currently  plan to make  the  Mobile
Lithotripsy Systems available at ambulatory surgery centers, the Partnership may
consider such a step in the future.  Proposed HCFA rules issued on June 12, 1998
setting  the  ambulatory  surgery  center rate for  various  procedures  include
lithotripsy among those procedures  approved for Medicare  reimbursement.  While
the proposed rules had a target effective date of October 1, 1998, the effective
date has been  postponed  indefinitely  for  reasons  unrelated  to  lithotripsy
coverage.


                                      -53-
<PAGE>

However,  the  proposed  rules'  commentary  discusses  the  history of previous
attempts  by HCFA in  proposed  rules  (published  on  December  7,  1990 and on
December  31, 1991) to  authorize  Medicare  reimbursement  for  lithotripsy  at
ambulatory  surgery  centers that were enjoined by federal  courts in litigation
initiated by the American  Lithotripsy  Society  challenging  the  reimbursement
rates  proposed  by HCFA ($812 in 1990 and  $1,150 in 1991).  The  proposal  for
reimbursement  contained  in the June 1998  proposed  rules  assigns a  Medicare
reimbursement rate of $2,107 for lithotripsy if the procedure is performed at an
ambulatory surgery center. Whether these proposed rules will become effective to
authorize  Medicare  reimbursement at ambulatory surgery centers and, if they do
become effective, whether the proposed reimbursement rate will remain unchanged,
is unknown to the General Partner.

     HCFA's rates under the proposed  outpatient  prospective payment system and
ambulatory   surgery  center   reimbursement  are  lower  than  many  healthcare
institutions'  typical  charges for the  procedure.  It is possible the proposed
outpatient   prospective   payment   system  and   ambulatory   surgery   center
reimbursement  rates could affect the  Partnership.  Lower  reimbursement  rates
could cause  contracting  hospitals to seek to pay lower equipment  rental rates
than expected by the General Partner.  This could have a material adverse effect
on Partnership revenues.

     The physician service (Part B) Medicare reimbursement for renal lithotripsy
is determined using Resource Based-Relative Value Scales ("RB-RVS").  The system
includes limitations on future physician  reimbursement increases tied to annual
expenditure   targets  legislated   annually  by  Congress  or  set  based  upon
recommendation  of the  Secretary  of the U.S.  Department  of Health  and Human
Services. Medicare has in the past, with regard to other Part B services such as
cataract implant surgery,  imposed significant reductions in reimbursement based
upon changes in  technology.  Thus,  changes in lithotripsy  technology  will be
subject to review by the  Medicare  program and  potential  future  decreases in
reimbursement must be considered probable as the lithotripsy  procedure has been
identified by the Medicare program as an overvalued one.

     The  Medicaid  programs in  Tennessee  (TennCare),  Alabama,  Arkansas  and
Kentucky are jointly sponsored by the federal and state governments to reimburse
service providers for medical services provided to Medicaid recipients,  who are
primarily the indigent.  The Medicaid programs in each of these states currently
provide   reimbursement   for  lithotripsy   services.   The  federal   Personal
Responsibility  and Work Opportunity  Reconciliation  Act of 1996 requires state
health plans, such as the Medicaid programs in Tennessee,  Alabama, Arkansas and
Kentucky, to limit Medicaid coverage for certain otherwise eligible persons. The
General Partner does not believe this legislation will have a significant impact
on the Partnership's  revenues.  In addition,  federal  regulations permit state
health  plans to limit the  provision  of services  based upon such  criteria as
medical necessity or other criteria  identified in utilization or medical review
procedures. The General Partner believes such steps have been taken in Tennessee
with the  establishment  of the TennCare  program;  the General Partner does not
know whether the Medicaid  programs in Alabama,  Arkansas or Kentucky have taken
or will take such steps.

     Self-Referral  Restrictions.  Health care  entities and  providers  seeking
reimbursement  for  services  covered by  Medicare  or  Medicaid  are subject to
federal regulation restricting referrals


                                      -54-
<PAGE>

by certain  physicians.  Congress has passed legislation  prohibiting  physician
self-referral  of patients  for  "designated  health  services",  which  include
inpatient and outpatient  hospital  services (42 U.S.C.  Section 1395nn) ("Stark
II").  Lithotripsy  services  were not  specifically  identified as a designated
health service by this  legislation,  but the  prohibition  includes any service
which  is  provided  to an  individual  who is  registered  as an  inpatient  or
outpatient of a hospital under proposed regulations discussed below. Lithotripsy
services  provided on the  Partnership's  equipment to all  patients,  including
Medicare and Medicaid  patients,  are billed by the contracting  hospital in its
name and under its provider numbers.  Accordingly,  these  lithotripsy  services
would likely be considered inpatient or outpatient services under Stark II.

     Physicians  Limited  Partners  may be deemed to have an indirect  financial
relationship with the Partnership's  contracting hospitals,  as Limited Partners
will receive  Distributions of the Partnership's profits which in turn are based
on the equipment  rental  charges paid by contracting  hospitals.  On January 9,
1998,  the Health Care  Financing  Administration  ("HCFA"),  the federal agency
responsible  for  administering  the  Medicare   program,   published   proposed
regulations  designed to clarify certain ambiguities and define certain terms of
Stark  II  (the  "Proposed  Stark  II  Regulations").   The  Proposed  Stark  II
Regulations and HCFA's  accompanying  commentary  discuss the requirements  that
equipment rental  arrangements  must meet in order to be protected  transactions
under Stark II. It is not clear whether the Partnership's  planned  arrangements
with contracting  hospitals meet all the requirements.  If the Proposed Stark II
Regulations  become  final in their  present  form (or if,  in the  meantime,  a
reviewing court adopts their positions as the proper interpretation of the Stark
II  statute),  then  compliance  Stark II may be achieved by  demonstrating  the
leases  with  contracting  hospitals  are at fair  market  value and do not vary
depending  on the volume or value of referrals  generated  by physician  Limited
Partners.  No  assurance  can be  given,  however,  that such  efforts  would be
successful. In the event the General Partner is unable to devise a plan pursuant
to which the  Partnership  may operate in compliance with Stark II and its final
regulations,  the General Partner is obligated  under the Partnership  Agreement
either (i) to purchase the Partnership  Interests of all the Limited Partners at
their Capital Account values or (ii) to dissolve and liquidate the  Partnership.
See  "Summary of the  Partnership  Agreement - Optional  Purchase of  Investment
Interests."

     HCFA's adoption of the current  Proposed Stark II Regulations as final or a
reviewing  court's  interpretation  of the Stark II statute in  reliance  on the
Proposed  Stark II  Regulations  and in a manner  adverse  to the  Partnership's
planned  operations  may mean that the  Partnership  and its  physician  Limited
Partners may be in  violation of Stark II. The General  Partner does not believe
either of the above instances will occur; however, no assurances can be made. In
either instance,  however, the Partnership and/or the physician Limited Partners
may not be permitted the opportunity to restructure operations and thereby avoid
an  obligation  to refund any  amounts  collected  from  Medicare  and  Medicaid
patients in violation of the statute.  Further,  under these  circumstances  the
Partnership  and physician  Limited  Partners may be assessed  with  substantial
civil monetary penalties and/or exclusion from providing services  reimbursed by
Medicare and Medicaid.

     Fraud  and  Abuse.  The  provisions  of the  federal  Social  Security  Act
addressing illegal remuneration (the "Anti-Kickback Statute") prohibit providers
and others from soliciting, receiving,


                                      -55-
<PAGE>

offering  or paying,  directly or  indirectly,  any  remuneration  in return for
either making a referral for a Medicare,  Medicaid or CHAMPUS covered service or
ordering,  arranging for or recommending any such covered service. Violations of
the  Anti-Kickback  Statute  may be  punished  by a  fine  of up to  $25,000  or
imprisonment  for up to five (5) years, or both. In addition,  violations may be
punished by substantial  civil penalties  and/or exclusion from the Medicare and
Medicaid programs.  Regarding exclusion, the Office of Inspector General ("OIG")
of the  Department  of Health and Human  Services  may  exclude a provider  from
participation  in the Medicare  program for a 5-year  period upon a finding that
the  Anti-Kickback  Statute has been violated.  After OIG  establishes a factual
basis for excluding a provider  from the program,  the burden of proof shifts to
the provider to prove the Anti-Kickback Statute has not been violated.

     The  Limited   Partners  are  to  receive  cash   Distributions   from  the
Partnership.  Since it is anticipated  that some of the Limited Partners will be
physicians  or other  entities in a position  to refer and  perform  lithotripsy
services using Partnership  equipment and personnel,  such  Distributions  could
come under scrutiny under the  Anti-Kickback  Statute.  The Third Circuit United
States Court of Appeals has held that the  Anti-Kickback  Statute is violated if
one  purpose  (as  opposed  to the  primary or sole  purpose)  of a payment to a
provider is to induce referrals.  U.S. v. Greber, 760 F.2d 68 (1985). The Greber
case was followed by the United  States Court of Appeals for the Ninth  Circuit,
United States v. Kats, 871 F.2d 105 (9th Cir. 1989),  and cited favorably by the
First  Circuit  in United  States v. Bay State  Ambulance  and  Hospital  Rental
Service, Inc., 874 F.2d 20 (1st Cir. 1989). Since none of these cases involved a
lithotripsy  syndication  or joint  venture such as the  Partnership,  it is not
clear how a court  would  apply  these  holdings  to the facts  related  to this
Offering.

     The OIG has indicated  that it is giving  increased  scrutiny to healthcare
joint ventures involving  physicians and other referral sources. In May 1989, it
published a Special Fraud Alert that outlined questionable features of "suspect"
joint ventures,  including some features which may be common to the Partnership.
While OIG Special  Fraud  Alerts do not  constitute  law,  they are  informative
because  they  reflect the general  views of the OIG as a  healthcare  fraud and
abuse investigator and enforcer.

     The OIG has published  regulations which protect certain  transactions from
scrutiny under the Anti-Kickback Statute (the "Safe Harbor" regulations). A Safe
Harbor, if complied with fully, will exempt such activity from prosecution under
the Anti-Kickback Statute.  However, the preamble to the Safe Harbor regulations
states that the failure of a particular business  arrangement to comply with the
regulations does not determine whether or not the arrangement violates the Anti-
Kickback  Statute  because the regulations do not themselves make any particular
conduct  illegal.  Any conduct that could be  construed to be illegal  after the
promulgation of the Safe Harbor regulations would have been illegal prior to the
publication of the regulations.

     Prospective Limited Partners should note that the anticipated ownership and
operations  of the  Partnership  may not  fully  comply  with any  Safe  Harbor;
however,  the  preamble  to the Safe  Harbor  regulations  makes  clear that the
failure to comply with a Safe Harbor does not mean the arrangement  violates the
Anti-Kickback Statute. A Safe Harbor was adopted which


                                      -56-
<PAGE>

protects  equipment  leasing  arrangements,  and  to  the  extent  possible  the
Partnership will comply with this Safe Harbor.  However,  it may not be possible
to comply with all the requirements of the Safe Harbor.

     HCFA has stated that one of its primary  concerns  regarding  self-referral
situations is the investing  physician's  ability to profit from any  diagnostic
testing that is generated  from the  services he or she  performs.  It should be
pointed out that HCFA has stated,  in  discussions of potential Safe Harbors and
other  enforcement  guidance,  that the potential for  overutilization  posed by
referrals for therapeutic  services such as lithotripsy is not as significant as
referrals in other contexts,  as the necessity for the therapeutic treatment can
be  objectively  determined;  i.e., a renal stone can be  definitely  determined
before treatment.

     The applicability of the Anti-Kickback  Statute to physician investments in
health care businesses to which they refer patients and which do not qualify for
a Safe Harbor is  unclear.  In the only case in which the OIG has  attempted  to
exercise the civil exclusion  remedy in the context of a  physician-owned  joint
venture,  The Hanlester  Network,  et al. v. Shalala,  the Ninth Circuit for the
United States Court of Appeals (the "Court") held that the Anti-Kickback Statute
is  violated  when a person  or  entity  (a) knows  that the  statute  prohibits
offering  or  paying  remuneration  to  induce  referrals  and  (b)  engages  in
prohibited  conduct  with the specific  intent to violate the law.  Although the
Court  upheld a lower court ruling that the joint  venture in question  violated
the Anti-Kickback Statute vicariously through the knowing and willful actions of
one of its agents,  who was acting outside the parameters of the joint venture's
offering  documents,  the  Court  concluded  there was not  sufficient  evidence
indicating  that a return on investment to physicians or other  investors in the
joint venture could on its own constitute an "offer or payment" of  remuneration
to make  referrals.  The Court also stated that since  profit  distributions  in
Hanlester  were made  based on each  investor's  ownership  share and not on the
volume of referrals,  the fact that large referrals by investors would result in
potentially high investment  returns did not, standing alone,  cause a violation
of the Anti- Kickback Statute.

     The Health Insurance  Portability and  Accountability  Act of 1996 directed
the OIG to respond to requests for advisory opinions regarding the effect of the
fraud and abuse statute on proposed business  transactions.  The General Partner
has not  requested  the OIG to review this Offering and, to the knowledge of the
General  Partner,  the OIG has not been asked by anyone to review  offerings  of
this type. Thus,  federal  regulatory  authorities  could take the position that
this  Offering is a means to illegally  influence  the referral  patterns of the
prospective  physician  Limited  Partners.  Because there is no legal  precedent
interpreting  circumstances  identical  to these  facts,  it is not  possible to
predict how this issue may be resolved if litigated.

     Whenever an offering of ownership  interests  is made  available to persons
with the potential to refer patients for services,  there is a possibility  that
the OIG, HCFA or other  government  officials may question whether the ownership
interests  are being  provided in return for or to induce  referrals  by the new
owners.  Remuneration,  which  government  officials  have said can  include the
provision  of an  opportunity  to invest in a facility to which a person  refers
patients for services,  under such facts may be challenged by the  government as
constituting a violation of the Anti-Kickback


                                      -57-
<PAGE>

     Statute.  Whether the offering of ownership  interests to investors who may
refer  patients for services on the  Partnership's  Mobile  Lithotripsy  Systems
might  constitute a violation of this law must be  determined in each case based
upon the  specific  facts  involved.  The various  mechanisms  in place to avoid
providing a financial benefit to prospective  Limited Partners for any referrals
of patients  (including the requirement  that all  distributions  of earnings to
Limited Partners be made in proportion to their investment  interest),  the fact
lithotripsy  is a  therapeutic  treatment  the need of which can be  objectively
determined,  and the existence in the General  Partner's  view of valid business
reasons  to engage in this  transaction,  form the basis in part of the  General
Partner's belief that this Offering is in compliance with legal requirements.

     The General Partner  intends for all business  activities and operations of
the  Partnership  to conform in all respects with all  applicable  anti-kickback
statutes  (federal or state).  The  General  Partner  does not believe  that the
Partnership's  contemplated  operations  violate  the  Anti-  Kickback  Statute.
Consequently, the General Partner does not believe that strict compliance with a
Safe Harbor is necessary for its operations. No assurance can be given, however,
that  the  proposed  activities  of the  Partnership  will not be  reviewed  and
challenged by regulatory  authorities empowered to do so, or that if challenged,
the Partnership will prevail.

     If the  activities  of the  Partnership  were  determined  to violate these
provisions, the Partnership,  the General Partner, officers and directors of the
General  Partner,  and each Limited Partner could be subject,  individually,  to
substantial  monetary  liability,  felony prison sentences and/or exclusion from
participation in Medicare, Medicaid and CHAMPUS. For the reasons outlined above,
it is the opinion of the General  Partner that the operations of the Partnership
will not violate the Anti-Kickback  Statute. A prospective  Limited Partner with
questions   concerning  these  matters  should  seek  advice  from  his  or  her
independent counsel.

     New  Legislation.  The General  Partner is not aware of any bill  currently
before  Congress  which has been  scheduled for  committee  hearings  which,  if
enacted into law, would have an adverse effect on the  Partnership's  operations
in a  fashion  similar  to the Stark II and the Anti-  Kickback  laws  discussed
above. In the event that  legislation  adversely  affecting the operation of the
Partnership's  business is enacted,  the General Partner is obligated  either to
purchase the ownership  interests of all the Limited Partners or to dissolve the
Partnership.  See  "Summary of the  Operating  Agreement - Optional  Purchase of
Partnership Interests."

     FTC  Investigation.   Issues  relating  to   physician-owned   health  care
facilities have been investigated by the Federal Trade Commission ("FTC"), which
investigated  two of the lithotripsy  limited  partnerships  affiliated with the
General  Partner,  to  determine  whether they posed an  unreasonable  threat to
competition in the health care field. The limited  partnerships  were advised in
1996 that the FTC's investigation was terminated without any formal action taken
by the FTC or any  restrictions  being placed on the  activities  of the limited
partnerships.  However,  the General Partner cannot assure that the FTC will not
investigate  issues arising from  physician-owned  health care facilities in the
future with respect to the General Partner or any of its  affiliates,  including
this Partnership.



                                      -58-
<PAGE>

     Ethical Considerations.  The American Medical Association's Code of Medical
Ethics states that  physicians  should not refer patients to facilities in which
they have an ownership  interest unless such physician directly provides care or
services  to  such  patient  at the  facility.  Further,  the  American  Medical
Association  recognizes  that there may be situations in which a needed facility
would not be built if referring physicians were prohibited from investing in the
facility. Therefore,  physicians may invest in and refer to an outside facility,
whether or not such physician  provides direct care or services at the facility,
if  there  is a  demonstrated  need  in  the  community  for  the  facility  and
alternative financing is not available.  Because physician Limited Partners will
be  providing  lithotripsy  services,  the  General  Partner  believes  that  an
investment  by a physician  will not be in  violation  of the  American  Medical
Association  Code of  Medical  Ethics.  In the event that the  American  Medical
Association  changes its ethical code to preclude  such  referrals by physicians
and such ethical  requirements  are applied to facilities or services  which, at
the time of adoption, are owned in whole or in part by referring physicians, the
Partnership and the interests of the Limited Partners may be adversely affected.

State Regulation

     Tennessee.  Tennessee  requires a  certificate  of need ("CON") to initiate
lithotripsy  services.  In Tennessee,  CONs for the lithotripsy  services on the
Partnership's  equipment are held not by the General  Partner or the Partnership
but rather by the Contract  Hospitals.  As the Contract Hospitals hold the CONs,
the  Partnership  merely  serves as an  equipment  vendor.  Any of the  Contract
Hospitals  could at any time terminate their  arrangements  with the Partnership
and arrange  for  another  lithotripsy  equipment  vendor to provide  equipment,
without any prohibitions or impediments  from the Tennessee CON agency.  Such an
action by a  Contract  Hospital  could  have a  material  adverse  effect on the
Partnership's revenues.

     To the best  knowledge  of the  General  Partner,  the  Mobile  Lithotripsy
Systems do not require licensure as health care institutions;  rather,  services
are deemed to be hospital  services  which are regulated  under the  contracting
hospital's  license.  Tennessee  requires  registration of x-ray  machines.  The
General Partner must comply with this and all other regulatory requirements.

     Tennessee  bars  referrals  of patients to entities in which the  referring
physician  has an ownership  interest  unless the referring  physician  performs
health care services at the entity. To ensure compliance with this law, patients
referred by physician Limited Partners for treatment on the Partnership's Mobile
Lithotripsy  Systems  must be  treated  by the  referring  physician.  Tennessee
requires  that  physicians  disclose  their  ownership  interests in health care
facilities or equipment in which they have ownership interests.  The Partnership
will require Limited Partners to comply with this requirement.

     Alabama.  Alabama  requires a CON for the  initiation of new  institutional
health  services,  which  include the  provision of  lithotripsy  services.  The
General  Partner  already  has a CON for the  lithotripsy  services  provided in
Alabama.  In  order  to  transfer  the  CON  from  the  General  Partner  to the
Partnership,  the  General  Partner  must  provide  the  Alabama CON agency with
written notice thirty (30) days before the proposed transfer. It is possible the
Alabama CON agency would


                                      -59-
<PAGE>

conclude no transfer of the CON is  necessary,  since the General  Partner  will
fully manage the new  Partnership.  The General  Partner either will provide the
CON agency  with  written  notice of the  transfer  or will  secure from the CON
agency  written  acknowledgment  that the notice is not  necessary on the ground
that there will be no transfer requiring such notice.


     Prospective  Limited  Partners  should be aware that the General Partner is
currently  involved in a CON  administrative  proceeding in Alabama in which the
General Partner is opposing five separate CON applications filed by LithoMedTech
of Alabama,  LLC ("LMTA") to provide mobile  lithotripsy  vendor services in the
majority of Alabama counties,  including in the  Partnership's  Service Area. In
the course of this proceeding,  LMTA has challenged the General Partner's status
as the proper holder of a CON  authorized to serve as a lithotripsy  vendor;  if
the General Partner does not properly hold a CON for lithotripsy equipment, then
the General Partner cannot legally oppose LMTA's application for CONs. The basis
for LMTA's  challenge  is that the  General  Partner  failed to timely  give the
Alabama CON agency notice of its  acquisition  of the  lithotripsy  equipment in
1993.

     In 1993, the General  Partner  acquired the lithotripsy  equipment  serving
Alabama,  and  the  CON  authorizing  the  purchase  and  establishment  of such
equipment,  from Tennessee Valley Lithotripter Ltd., ("TVL Ltd."), in whose name
the CON was issued in 1992.  Under the  regulations  of the  Alabama CON agency,
anyone  intending to acquire major medical  equipment  already  subject to a CON
must provide written notice to the CON agency 30 days in advance of the proposed
transaction.  When the General Partner  acquired the lithotripsy  equipment from
TVL Ltd. in 1993, no such notice was filed.  However,  in September 1994, notice
was filed by the General Partner and approved by the CON agency.

     In the course of the contested CON  proceedings  with LMTA,  LMTA requested
that  the  administrative  law  judge  ("ALJ")  dismiss  the  General  Partner's
opposition to LMTA's  application on the basis that the failure to properly file
advance notice of change of ownership in strict  compliance  with the regulation
renders the CON void.  The ALJ has not yet ruled  regarding  this  request.  The
General  Partner  believes it is unlikely the ALJ would  invalidate  the General
Partner's  CON  based  on the  grounds  that CON  agency  routinely  waives  the
thirty-day  advance filing  requirement and the CON agency's express approval of
the  General   Partner's  belated  notice.  If  the  General  Partner's  CON  is
invalidated, then the Partnership would be prohibited from providing lithotripsy
equipment services in Alabama.  This could have a material adverse affect on the
Partnership's revenues.

     Radiation-producing  machines such as the on-board x-ray must be registered
with the Alabama radiation  protection  agency. The General Partner is not aware
of any other  legal  requirements  which would  prohibit  the  Partnership  from
operating or continuing to operate as planned.

     Arkansas.  In  Arkansas,  there is no CON  requirement  for  major  medical
equipment or mobile  health  services.  Hospitals  which wish to establish a new
health service must give notice


                                      -60-
<PAGE>

to and obtain the prior approval of the Health Facility Services Division before
instituting  the new  service.  The  Division's  review  determines  whether the
hospital has adequate  policies and  procedures  in place to handle the service.
X-ray machines must be registered with the state Radiation Control Division.

     Kentucky.  Kentucky  requires a certificate  of need ("CON") to establish a
health  facility,  to make a  substantial  change  in a  health  service,  or to
purchase any capital  equipment  which costs more than  $1,567,500.  The General
Partner  already has a CON for the  lithotripsy  services  provided in Kentucky,
except at two sites,  Lourdes Hospital in Paducah and  Owensboro-Mercy  hospital
system in  Owensboro.  An  existing  CON may be  transferred  so long as the CON
agency is provided with written notice thirty (30) days before the transfer. The
General  Partner  will comply with this  requirement.  Regarding  the  equipment
services  provided at Lourdes and Owensboro-  Mercy,  as neither the Partnership
nor the General Partner holds the CON for lithotripsy services,  the Partnership
will merely serve as an equipment vendor.  Either of these contracting hospitals
could at any time terminate their  arrangements with the Partnership and arrange
for  another  lithotripsy  equipment  vendor to provide  equipment,  without any
prohibitions  or  impediments  from the Kentucky  CON agency.  Such an action by
either of these  contracting  hospitals could have a material  adverse effect on
the Partnership's revenues.

     The Mobile  Lithotripsy  Systems are licensed as mobile health  services by
the Kentucky Division of Licensing and Regulation.  Licensure  requires a survey
of the Mobile  Lithotripsy  Systems and approval of the policies and  procedures
related to the Mobile Lithotripsy  Systems. The General Partner does not believe
continued compliance with the licensure requirement will prevent the Partnership
from  operating  as planned in  Kentucky.  Notice of transfer of  ownership of a
licensed  mobile health service must be provided to the regulatory  agency after
the transfer. The General Partner will comply with this requirement.

     Regarding  physician  referrals,  Kentucky  law  incorporates  the American
Medical  Association's  Code of Medical  Ethics  (discussed  above) in requiring
physicians  to provide  services  at  entities  in which they have an  ownership
interest and to which they refer patients.  To ensure  compliance with this law,
all physician  Limited  Partners  licensed in Kentucky who make referrals to the
Partnership's   Mobile   Lithotripsy   Systems  must  provide  services  on  the
lithotripter.  Kentucky law prohibits physicians from receiving any compensation
in exchange for referrals of Medicare or Medicaid  patients.  As the Partnership
will not  compensate  any  physician  for  referrals  (rather,  all  payments to
physicians  are based on their equity  interests in the  Partnership),  this law
will not be violated.  However,  the law also  provides  that any conduct  which
violates the federal Stark II and Anti-Kickback  laws (discussed above) shall be
deemed to violate Kentucky law. Violations are punishable by criminal penalties,
repayment  of Medicaid  reimbursements  which were in  violation  of the law and
exclusion from the Kentucky Medicaid program.

     Kentucky  requires  registration  of x-ray  machines and  certification  of
radiologic  technologists.  The Partnership  must comply with this and all other
regulatory  requirements in order to operate the Mobile  Lithotripsy  Systems in
Kentucky.
 


                                      -61-
<PAGE>

     THE GENERAL PARTNER AND THE PARTNERSHIP BELIEVE  LITHOTRIPSY  SERVICES WILL
CONTINUE  TO BE SUBJECT TO INTENSE  GOVERNMENTAL  REGULATION  AT THE FEDERAL AND
STATE LEVELS AND, THEREFORE, CANNOT PREDICT THE SCOPE AND EFFECT THEREOF.

     PROSPECTIVE LIMITED PARTNERS SHOULD CONSULT WITH THEIR OWN LEGAL COUNSEL AS
TO THE  IMPLICATIONS  OF FEDERAL AND STATE LAWS AND  PROFESSIONAL  ETHICAL CODES
DEALING WITH  PHYSICIAN  OWNERSHIP OF MEDICAL  EQUIPMENT AND  FACILITIES  BEFORE
PURCHASING UNITS.

                                PRIOR ACTIVITIES

     Since 1985, the Management  Agent and its Affiliates  have been involved in
the formation of urological medical limited partnerships and have closed on over
thirty such limited partnership offerings.

     For  numerous  reasons,  including  differences  in  equipment,   financial
structure,   program  size,  economic  conditions  and  distribution   policies,
operating results obtained by the Management Agent and its Affiliates should not
be  considered  as  indicative  of  the  operating  results  obtainable  by  the
Partnership.  Moreover,  it should not be assumed  that  Limited  Partners  will
experience  returns on their investment  comparable to those  experienced by the
General  Partner in  connection  with the  operation  of the  Business or by its
Affiliates in any of these other ventures.  See "Risk Factors - Other Investment
Risks - Financial Projections."

     A  summary  of the  twenty-three  urological  medical  limited  partnership
offerings  that were  sponsored by the  Management  Agent and its Affiliates and
which have closed is set forth below.

     Carolina Lithotripsy, A Limited Partnership.  Dr. William R. Jordan, former
Chief Executive  Officer and majority  shareholder of the Management Agent prior
to  its  acquisition  by  Prime,  organized  Carolina  Lithotripsy,   A  Limited
Partnership,  a  North  Carolina  limited  partnership  ("Carolina"),  in  1984.
Carolina  was formed to  purchase  an HM3 kidney  lithotripter  manufactured  by
Dornier  Systems  GmbH and to  operate  a  lithotripsy  business.  In a  private
offering of units of limited  partnership  interest  consummated  in March 1985,
Carolina  sold an  aggregate  of 41 units to 48  limited  partners  residing  in
eastern North Carolina and  northeastern  South  Carolina.  Limited  partners of
Carolina  also  guaranteed  $2,925,000 of  indebtedness  incurred by Carolina to
purchase its lithotripter. All indebtedness incurred by Carolina to purchase its
lithotripter  that  was  guaranteed  by its  limited  partners  was  prepaid  by
Carolina.  Dr.  Jordan has served as the  managing  general  partner of Carolina
since its formation.

     On October 5, 1988, Carolina purchased the first LithostarTM sold after FDA
approval. The LithostarTM was delivered to Fayetteville on October 10, 1988, and
was first used to treat  patients on November 14, 1988.  In July 1989,  Carolina
purchased a mobile LithostarTM system


                                      -62-
<PAGE>

located in a Calumet Mobile Coach.  In 1992,  the  fixed-based  LithostarTM  was
changed to a mobile configuration and Carolina now operates two mobile units.

     Fayetteville   Lithotripters   Limited   Partnership-Utah  I.  Fayetteville
Lithotripters Limited  Partnership-Utah I (the "Utah Partnership") sold 40 units
of limited  partnership  interest to 37 investors  (including  Affiliates of the
Management  Agent)  for an  aggregate  offering  price  of  $78,250  in cash and
$1,517,480  in  guaranties  of  partnership  principal  obligations.   The  Utah
Partnership  acquired a LithostarTM  located in a mobile  Calumet Coach in July,
1989, and operated at a site in Salt Lake City exclusively  until  mid-September
1989 when it began  traveling  to other  locations  in Utah and Idaho.  The Utah
Partnership  began  operations in Montana in November 1989 and began  conducting
operations  in Nevada in 1990 and  thereafter  began  operating  in Wyoming  and
Idaho.  The Utah  Partnership no longer  operates in Montana.  As of the date of
this Memorandum, the Partnership has performed in excess of 1,000 procedures and
its financial success has exceeded projections.

     Fayetteville    Lithotripters   Limited   Partnership-South   Carolina   I.
Fayetteville Lithotripters Limited Partnership-South Carolina I ("South Carolina
I") sold 80 units of limited  partnership  interests to 34 investors  (including
the  Management  Agent and its  Affiliates)  for an aggregate  offering price of
$72,500  in  cash  and  $1,318,000  in  guaranties  of   partnership   principal
obligations. South Carolina I acquired a LithostarTM located in a mobile Calumet
Coach in September  1989. It has been operating in the eastern and coastal areas
of South  Carolina  since mid-  September  1989,  and has performed in excess of
1,000 procedures and its financial success has exceeded projections.

     Fayetteville   Lithotripters   Limited   Partnership-South   Carolina   II.
Fayetteville   Lithotripters  Limited  Partnership-South   Carolina  II  ("South
Carolina  II") sold 40 units of limited  partnership  interests  to 30 investors
(including  Affiliates of the Management Agent) for an aggregate  offering price
of  $77,500  in cash and  $1,517,485  in  guaranties  of  partnership  principal
obligations.  South  Carolina  II  acquired  a  LithostarTM  located in a mobile
Calumet  Coach in August  1989.  It has been  operating  in  northwestern  South
Carolina and southwestern  North Carolina,  and has performed in excess of 1,000
procedures and its financial success has exceeded projections.

     Fayetteville  Lithotripters  Limited  Partnership-Arizona  I.  Fayetteville
Lithotripters Limited  Partnership-Arizona I (the "Arizona Partnership") sold 80
units of limited partnership interests to 31 investors (including the Management
Agent and its Affiliates) for an aggregate offering price of $72,500 in cash and
$1,318,000 in  guaranties  of  partnership  principal  obligations.  The Arizona
Partnership  acquired a LithostarTM  located in a mobile Calumet Coach and began
performing  lithotripsy  services in Arizona in December 1989. As of the date of
this  Summary,  the  Arizona  Partnership  has  performed  in  excess  of  1,000
procedures and its financial success has exceeded projections.

     Louisiana Lithotripsy Investment Limited Partnership. Louisiana Lithotripsy
Investment  Limited  Partnership (the Louisiana  Partnership")  sold 80 units of
limited  partnership  interests to 46  investors  (including  Affiliates  of the
Management Agent) for an aggregate offering


                                      -63-
<PAGE>

price  of  $79,437.50  in cash  and  $1,289,250  in  guaranties  of  partnership
principal obligations.  The Louisiana Partnership is the sole limited partner of
Fayetteville  Lithotripters  Limited  Partnership-  Louisiana I ("Louisiana I").
Louisiana I acquired a LithostarTM  located in a mobile  Calumet Coach and began
providing  services in Louisiana  and Texas in May 1990.  As of the date of this
Memorandum,  Louisiana I has  performed  in excess of 1,000  procedures  and its
financial success has exceeded projections.

     Fayetteville  Lithotripters  Limited  Partnership-Virginia  I. Fayetteville
Lithotripters  Limited  Partnership-Virginia  I ("Virginia  I") sold 80 units of
limited  partnership  interests to 51  investors  (including  Affiliates  of the
Management  Agent) for an aggregate  offering  price of  $77,662.50  in cash and
$1,289,250 in guaranties of partnership principal obligations.  Virginia I began
performing  lithotripsy  services  in  Virginia  in July  1990.  Virginia I also
services  locations  in  northeastern  North  Carolina.  As of the  date of this
Memorandum,  Virginia  I has  performed  in excess of 1,000  procedures  and its
financial success has exceeded projections.

     Fayetteville  Lithotripters  Limited  Partnership-Arkansas  I. Fayetteville
Lithotripters  Limited  Partnership-Arkansas  I ("Arkansas  I") sold 80 Units of
limited  partnership  interests to 38  investors  (including  Affiliates  of the
Management Agent) for an aggregate offering price of $77,500 cash and $1,337,000
in  guaranties  of  partnership  principal  obligations.  Arkansas  I acquired a
LithostarTM  located in a mobile Calumet Coach and began performing  services in
Arkansas  in  July  1990.  As of the  date of this  Memorandum,  Arkansas  I has
performed in excess of 1,000  procedures and its financial  success has exceeded
projections.

     San  Diego  Lithotripters  Limited  Partnership.  San  Diego  Lithotripters
Limited  Partnership  (the "San  Diego  Partnership")  sold 80 units of  limited
partnership interests to 48 investors for an aggregate offering price of $80,000
in cash and $1,528,000 in guaranties of partnership  principal  obligations.  In
January 1991,  the San Diego  Partnership  acquired a  LithostarTM  located in a
Calumet Coach and began treating  patients in the  southwestern  California area
(primarily in the San Diego area).  As of the date of this  Memorandum,  the San
Diego  Partnership has performed in excess of 1,000 procedures and its financial
success has exceeded projections.

     Tennessee  Lithotripters  Limited  Partnership I.  Tennessee  Lithotripters
Limited  Partnership  I  ("Tennessee  I") sold 80 units of  limited  partnership
interest to 49 investors for an aggregate  offering price of $80,000 in cash and
$1,286,911 in  guaranties  of  partnership  principal  obligations.  Tennessee I
acquired a LithostarTM located in a Calumet Coach and began treating patients in
Memphis,  Tennessee  in late  April  1991.  As of the  date of this  Memorandum,
Tennessee  I has  performed  in excess  of 1,000  procedures  and its  financial
success has exceeded projections.

     California   Lithotripters   Limited   Partnership-II,    L.P.   California
Lithotripters  Limited  Partnership-II,  L.P. ("California II") sold 80 units of
limited partner interest to 63 investors (including Affiliates of the Management
Agent) for an  aggregate  offering  price of $79,375 in cash and  $1,337,000  in
guaranties  of  partnership  principal  obligations.  California  II  acquired a
LithostarTM located in a Calumet Coach and began treating patients in the Orange
County,  California area in early April 1991.  California II also entered into a
joint venture with California Lithotripters


                                      -64-
<PAGE>

Limited  Partnership-III,  L.P.  and  jointly  financed  and  acquired  a second
LithostarTM located in a mobile self-propelled  Calumet Coach. As of the date of
this  Memorandum,  California II has performed in excess of 1,000 procedures and
its financial success has exceeded projections.

     Texas  Lithotripsy  Limited  Partnership I L.P. Texas  Lithotripsy  Limited
Partnership I L.P.  ("Texas I") sold 80 units of limited partner  interest to 32
investors  (including the Management  Agent and its Affiliates) for an aggregate
offering  price of $190,375 in cash and  $1,483,428 in guaranties of partnership
principal obligations. Texas I acquired a LithostarTM located in a Calumet Coach
and began treating patients in the southeastern Texas area in August 1991. As of
the date of this Memorandum, Texas I has performed in excess of 1,000 procedures
and its financial success has exceeded projections.

     Texas Lithotripsy  Limited  Partnership II L.P. Texas  Lithotripsy  Limited
Partnership II L.P.  ("Texas II"), sold 80 units of limited partner  interest to
41  investors  (including  the  Management  Agent  and  its  Affiliates)  for an
aggregate  offering  price of $196,625 in cash and  $1,483,428  in guaranties of
partnership principal obligations.  Texas II acquired a LithostarTM located in a
Calumet Coach and began treating patients in the Fort Worth metropolitan area of
Texas in July 1991. As of the date of this Memorandum, Texas II has performed in
excess of 1,000 procedures and its financial success has exceeded projections.

     Texas Lithotripsy  Limited  Partnership-III  L.P. Texas Lithotripsy Limited
Partnership-III  L.P. ("Texas III") sold 78 units of limited partner interest to
41  investors  (including  the  Management  Agent  and  its  Affiliates)  for an
aggregate  offering  price of $188,630 in cash and  $1,446,342  in guaranties of
partnership principal obligations. Texas III acquired a LithostarTM located in a
Calumet  Coach and began  treating  patients in the south  central Texas area in
August  1991.  As of the date of this  Memorandum,  Texas III has  performed  in
excess of 1,000 procedures and its financial success has exceeded projections.

     Indiana  Lithotripters Limited Partnership I. Indiana Lithotripters Limited
Partnership  I  ("Indiana  I") sold 80 units of limited  partner  interest to 34
investors for an aggregate  offering  price of $80,000 in cash and $1,672,000 in
guaranties  of  partnership   principal   obligations.   Indiana  I  acquired  a
LithostarTM located in a Calumet Coach and began treating patients in Indiana in
May 1991. As of the date of this  Memorandum,  Indiana I has performed in excess
of 1,000 procedures and its financial success has exceeded projections.

     Las  Vegas  Lithotripters  Limited  Partnership.  Las  Vegas  Lithotripters
Limited  Partnership ("Las Vegas") sold 78 Units of limited partner interests to
26  investors  (including  the  Management  Agent  and  its  Affiliates)  for an
aggregate  offering  price of $111,800 in cash and  $851,682  in  guaranties  of
partnership principal  obligations.  Las Vegas acquired a fixed-base LithostarTM
and began treating patients in Las Vegas,  Nevada in August 1991. As of the date
of this Memorandum,  Las Vegas has performed in excess of 500 procedures and its
financial success has exceeded projections.



                                      -65-

     California   Lithotripters   Limited   Partnership-III,   L.P.   California
Lithotripters Limited Partnership-III,  L.P. ("California III") sold 26 Units of
limited  partner  interests  to  23  investors  (including   Affiliates  of  the
Management  Agent)  for an  aggregate  offering  price  of  $64,025  in cash and
$249,166 in guaranties of  partnership  principal  obligations.  California  III
entered into a joint venture with California II,  acquired a LithostarTM  Mobile
System, and began treating patients in the Santa Barbara and Ventura, California
area in  August  1991.  As of the date of this  Memorandum,  California  III has
performed in excess of 500  procedures  and its  financial  success has exceeded
projections.

     Florida  Lithotripters Limited Partnership I. Florida Lithotripters Limited
Partnership  I  ("Florida  I") sold 80 units of limited  partner  interest to 71
investors  (including  Affiliates  of the  Management  Agent)  for an  aggregate
offering  price of $198,750 in cash and  $1,560,206 in guaranties of partnership
principal  obligations.  Florida I  acquired a  LithostarTM  located in a mobile
self-propelled  Calumet  Coach  and began  treating  patients  in north  central
Florida  in  October  1991.  As of the date of this  Memorandum,  Florida  I has
performed in excess of 1,000  procedures and its financial  success has exceeded
projections.

     Montana  Lithotripters Limited Partnership I. Montana Lithotripters Limited
Partnership  I ("Montana  I") sold 160 units of limited  partner  interest to 31
investors  (including  Affiliates of the Management  Agent) for $188,500 in cash
and $720,000 in  guaranties  of  partnership  principal  obligations.  Montana I
acquired a fixed-base LithostarTM and began treating patients in August 1992. As
of the  date of this  Memorandum,  Montana  I has  performed  in  excess  of 500
procedures and it has met financial projections.

     Texas Lithotripsy  Limited  Partnership IV L.P. Texas  Lithotripsy  Limited
Partnership IV L.P.  ("Texas IV"), sold 80 units of limited partner  interest to
35 investors (including the Management Agent and its Affiliates) for $189,500 in
cash and $1,643,670 in guaranties of partnership principal obligations. Texas IV
acquired a LithostarTM  Mobile System and began treating  patients in July 1992.
As of the date of this  Memorandum,  Texas IV has  performed  in excess of 1,000
procedures and its financial success has exceeded projections.

     Texas  Lithotripsy  Limited  Partnership V L.P. Texas  Lithotripsy  Limited
Partnership V L.P.  ("Texas V") sold 80 units of limited partner  interest to 31
investors  (including the Management  Agent and its  Affiliates) for $187,500 in
cash and $1,643,670 in guaranties of partnership principal obligations.  Texas V
acquired a  LithostarTM  Mobile  System and began  treating  patients in January
1993.  As of the date of this  Memorandum,  Texas V has  performed  in excess of
1,000 procedures and its financial success has exceeded projections.

     Mountain  Lithotripsy Limited Partnership - I. Mountain Lithotripsy Limited
Partnership - I ("Mountain I") sold 31 units of limited  partner  interest to 16
investors (including Affiliates of the Management Agent) for $77,500 in cash and
$588,765 in  guarantees  of  partnership  principal  obligations.  In July 1995,
Mountain  I acquired  a  LithostarTM  Mobile  System  and has  treated  over 500
patients. The financial success of Mountain I has exceeded projections.



                                      -66-
<PAGE>

     Pacific Medical Limited  Partnership.  Pacific Medical Limited  Partnership
("Pacific") sold 80 units of limited partner interest to 35 investors (including
Affiliates  of the  Management  Agent) for  $200,000 in cash and  $1,321,611  in
guarantees of  partnership  principal  obligations.  Pacific  recently  obtained
approval to receive a CON in Hawaii and began operations last fall.

     Texas  Lithotripsy  Limited  Partnership VI, L.P. In September 1997,  Texas
Lithotripsy Limited Partnership VI, L.P. ("Texas VI") received subscriptions and
closed on 160 units of limited partnership  interest to 13 investors  (including
Affiliates  of the  Management  Agent)  for  $361,100  in  cash.  Texas VI began
operations in October 1997.

     Great Lakes Lithotripsy Limited  Partnership.  In October 1997, Great Lakes
Lithotripsy  Limited  Partnership  ("Great Lakes")  received  subscriptions  and
closed on 80 units of limited partnership  interest to 23 investors for $200,000
in cash and $844,800 in guaranties of partnership principal  obligations.  Great
Lakes expects to begin operations in the near future.

     A summary of the urological medical venturers  currently owned and operated
directly  by  Prime,  which  owns all the  stock  of the  Management  Agent  and
indirectly owns all of the stock of the General Partner, is set forth below.

     Alabama Renal Stone  Institute.  This fixed site Dornier HM-3  lithotripter
operation was purchased in April 1992. The lithotripter, which is located on the
campus of Brookwood Hospital,  exclusively  provides lithotripsy services in the
Birmingham,  Alabama  area and  services  all local  physicians.  Alabama  has a
restrictive  CON law  limiting  the number of  lithotripters  in the state.  The
lithotripter has treated over 1,000 patients.

     Alabama  Lithotripsy  Services.  This  mobile  lithotripter  operation  was
purchased from a hospital and a group of 22 local physicians in August 1994. The
service area includes five cities in the northern/central Alabama area where the
company provides exclusive lithotripsy services to hospitals and physicians. The
lithotripter has treated over 1,000 patients.

     Tennessee Valley Lithotripter.  This operation consists of 5 mobile Dornier
HM-3  units  serving  hospitals  throughout  Tennessee,  Kentucky  and  northern
Alabama.  Prime acquired this entity in July 1993, from over 200 physicians that
held  interests  in three  separate  partnerships.  Due to the size and scope of
coverage of this  operation,  it is the largest mobile  lithotripsy  provider in
Tennessee and Kentucky.

     Prime Kidney  Stone  Treatment,  Inc.  This mobile  lithotripter  operation
consists of two mobile Dornier HM-4  lithotripters  serving over 20 locations in
Wisconsin,  Illinois, Indiana, West Virginia,  Maryland and Pennsylvania.  Prime
purchased  these machines in January 1994. The  lithotripters  have treated over
1,000 patients.

     Metro Atlanta Stonebusters G.P. Prime purchased a 60% equity in this mobile
Siemens LithostarTM operation in April 1994, from a group of 15 local urologists
that retained a 40%


                                                       -67-
<PAGE>

equity  interest.  This  venture  services  five  healthcare  facilities  in the
Atlanta, Georgia area. The lithotripter has treated over 1,000 patients.

     Texas Litho,  Inc. This wholly owned  subsidiary  was purchased in December
1994,  from Maxum and provides  management  services as well as holding  general
partner and limited partner equity interests in Texas  ESWL/Laser  Lithotripter,
Ltd. Over 30 investors hold the remaining equity interest in Texas ESWL, some of
whom acquired  their interest in a recent  dilution  offering.  Limited  partner
units sold for  $4,400  each in the 1991  offering  which  raised  approximately
$286,000 from new investors.  Units sold for $12,500 in the 1997  offering.  The
economic  participation  of a unit in ESWL is a function  of the number of units
outstanding  from time to time.  This venture  utilizes a Mobile Dornier MFL5000
lithotripter  servicing accounts Texas, Oklahoma, and Arkansas. The lithotripter
has treated over 1,000 patients.

     Ohio Litho,  Inc.  This wholly owned  subsidiary  was purchased in December
1994, from Maxum Health Services Corp. and performs  management services as well
as holding a 16.73% general  partner equity  interest and 0.90% limited  partner
position in Ohio Mobile  Lithotripter Ltd. This entity operates a mobile Dornier
HM-3  lithotripter  servicing  four  hospitals  in the  northeastern  Ohio area.
Approximately  43 physicians  own the remaining  equity  interest in Ohio Mobile
Lithotripter LTD. The lithotripter has treated over 1,000 patients.  Ohio Litho,
Inc. also owns  approximately 43% of, and serves as the general partner of, Ohio
Mobile  Lithotripter II Ltd., an Ohio limited  partnership formed in 1996 ("Ohio
Mobile  II").  Ohio  Mobile II  operates a Dornier HM4 under lease from PKST and
services 2 hospitals.  41 physician  limited  partners own the remaining  equity
interest in Ohio Mobile II, which performed 120 procedures last year.

     R.R.  Litho,  Inc. This wholly owned  subsidiary  was purchased in December
1994 from Maxum Health Services Corp. and performs  management  services as well
as holding a 19.25% general partner interest in Arklatx Mobile Lithotripter Ltd.
This entity  utilizes a mobile Siemens  LithostarTM to serve eight  locations in
the Louisiana area.  Approximately  31 physicians  hold the remaining  equity in
Arklatx. The lithotripter has treated over 1,000 patients.

    Southern  California Stone Center L.L.C. This fixed site Siemens LithostarTM
lithotripsy  operation  is located  in Sherman  Oaks,  California.  The  company
purchased  a 32.5%  equity  interest  in this  entity  in June  1995,  with  the
remaining 67.5% equity being held by local physician investors. The lithotripter
has treated over 1,000 patients.

     Kidney Stone Center of South Florida. Prime purchased a 70% equity stake in
this fixed site Dornier HM-3  lithotripsy  operation in July 1995. The remaining
30% ownership  equity is held by local  physicians in the Miami/Fort  Lauderdale
area. The lithotripter has treated over 1,000 patients.

     Sun  Medical  Technologies,  Inc.  Prime  purchased  this  operation  which
consists  of  eight  fixed  and  mobile  lithotripters   operating  in  Arizona,
Washington,  Wyoming,  Montana  and New  Mexico  in  October  1995.  Four of the
machines are operated in two partnership structures which include area physician
investors with Sun providing management services and holding 50% as the


                                      -68-
<PAGE>

general  partner.  The remaining  four machines are wholly owned and operated by
Prime. The lithotripters have treated over 1,000 patients.

     Tenn-Ga Stone Group Two, L.P. Prime  purchased a 38.25% equity  interest in
this mobile  lithotripsy  operation in May 1997. The partnership's  lithotripter
has been in operation  since 1993 and currently  services  various  locations in
Tennessee and Georgia.  The remaining  61.75% equity interest in the partnership
is held primarily by local physicians in Tennessee and Georgia.

     Executive  Medical  Enterprises,  Inc.  Pursuant to a stock purchase,  this
Company  became a wholly owned  subsidiary  of Prime in July 1997.  This venture
operates a mobile  lithotripter  which  services  locations  in  California  and
Oregon,  and one fixed site lithotripter  which provides  treatment  services in
Washington.

     Certain additional financial  information  regarding the urological medical
ventures  formed or operated by the Management  Agent and its Affiliates will be
made available upon request.  The  Management  Agent and its Affiliates  plan to
continue forming and/or  acquiring  ventures similar to the one proposed in this
Offering across the United States. See "Management Agent."

                           TAX ASPECTS OF THE OFFERING

     INVESTORS  SHOULD  NOTE THAT THE UNITS ARE BEING  MARKETED  BY THE  GENERAL
PARTNER AS AN ECONOMIC  INVESTMENT AND THAT THE GENERAL PARTNER  ANTICIPATES AND
INTENDS NO  SIGNIFICANT  TAX  BENEFITS  FROM AN  INVESTMENT  IN THE  UNITS.  SEE
"PASSIVE  INCOME  AND  LOSSES" IN THIS  SECTION.  THE  INVESTMENT  IN UNITS IS A
LONG-TERM INVESTMENT.  INVESTORS SHOULD NOT INVEST IN THE PARTNERSHIP TO ACHIEVE
TAX BENEFITS AS THE GENERAL PARTNER ANTICIPATES,  AND THE FINANCIAL  PROJECTIONS
FORECAST,  SIGNIFICANT  PARTNERSHIP  TAXABLE  INCOME  THROUGHOUT THE TERM OF THE
PARTNERSHIP.

     The following  general  summary of certain United States federal income tax
aspects  relating to an  investment in the  Partnership  is based upon the Code,
applicable   Treasury   Regulations  (the   "Regulations"),   current  published
administrative positions of the Service contained in Revenue Rulings and Revenue
Procedures, and existing judicial decisions.  Investors should note that the Tax
Reform Act of 1986  substantially  revised the tax consequences of an investment
in an entity such as the Partnership. No assurance can be given that legislative
or  administrative  changes or court decisions may not be forthcoming that could
significantly modify the statements in this summary. Any such changes may or may
not be retroactive  with respect to  transactions  effected prior to the date of
such changes.

     Moreover,   the  Investors   should  note  that  the  discussion  below  is
necessarily  general and the  applicability or effect of matters discussed below
may vary  depending  on an  Investor's  individual  circumstances.  Thus,  it is
impractical  to comment  definitively  on all aspects of federal  income tax law
which may affect each Investor. THEREFORE, EACH INVESTOR SHOULD


                                      -69-
<PAGE>

SATISFY HIMSELF AS TO THE INCOME AND OTHER TAX CONSEQUENCES OF HIS PARTICIPATION
IN THE  PARTNERSHIP BY OBTAINING  ADVICE FROM HIS OWN TAX COUNSEL.  Furthermore,
while the  Partnership  will  furnish each  Limited  Partner with the  necessary
information  to enable him to file the tax  returns  for which he may be liable,
the preparation  and filing of such returns will be the personal  responsibility
of the Limited Partner. The following discussion,  however, may be useful to the
Investors with respect to their evaluation of an investment.

     The Partnership will receive the legal opinion of Womble Carlyle  Sandridge
& Rice, PLLC, a Professional  Limited Liability Company  ("Counsel"),  regarding
certain  federal  income tax aspects of the offering and certain other  matters.
This opinion is subject to important  qualifications  and limitations,  however,
and should be read  thoroughly by each  Investor and his counsel.  A copy of the
form of this  opinion is attached to the  Summary as  Appendix E.  Although  the
Partnership intends to rely on the legal opinion,  the Service will not be bound
thereby, and the Partnership could be subjected to substantial legal expenses in
defending  its position if the Service  should take a position  contrary to that
set forth in the  opinion.  Counsel for the  Partnership  is  providing no legal
opinion regarding the Financial  Projections attached to the Summary as Appendix
A.

Partnership Status

     The Partnership will not seek a ruling from the Service  concerning the tax
status of the  Partnership.  It is the opinion of Counsel  that the  Partnership
will be treated as a partnership  for federal  income tax purposes and not as an
association  taxable as a  corporation  unless the  Partnership  so elects.  The
Partnership  will  not  make  an  election  to be  classified  as  other  than a
partnership for federal income tax purposes. Although the Partnership intends to
rely on the legal  opinion of Counsel,  the Service  will not be bound  thereby.
Moreover,  there can be no assurance that legislative or administrative  changes
or court decisions may not in the future result in the Partnership being treated
as an association taxable as a corporation,  with a resulting greater tax burden
associated  with the  purchase  of  Units.  See  "Effect  of  Classification  as
Corporation" below.

     Counsel's opinion discussed above relies upon recently promulgated Treasury
Regulations.  Treasury  Regulation  Section  301.7701-2  provides  that  certain
business  entities will be treated as associations  taxable as corporations  for
federal  income tax  purposes.  These  business  entities  include  corporations
denominated  as such under  applicable  state law,  associations,  joint-  stock
companies,  insurance  companies,  organizations  that conduct  certain  banking
activities,  organizations wholly owned by a State, other organizations that are
taxable  as  corporations  under  another  provision  of the Code,  and  certain
organizations formed under the laws of a foreign jurisdiction.  According to the
Treasury  Regulations,  business  entities not  classified as  corporations  are
eligible  to choose  their  classification  for  federal  income  tax  purposes.
Domestic eligible entities with at least two members may choose to be classified
as either a  partnership  or a  corporation  for  federal  income tax  purposes.
Partnerships  formed pursuant to state law will be considered  domestic eligible
entities and may choose their classification for federal income tax purposes. If
an eligible


                                      -70-
<PAGE>

entity does not make an election to be treated as a corporation, then the entity
will be treated as a partnership for federal income tax purposes.

     As the  Partnership  will  have at least  two  members  and will be  formed
pursuant to the Act, the  Regulations  will treat the  Partnership as a domestic
entity  eligible  that may chose  partnership  status  for  federal  income  tax
purposes.  Therefore,  it is anticipated that on the Closing Date,  Counsel will
render its opinion that as long as the Partnership does not elect otherwise, the
Partnership will be treated for federal income tax purposes as a partnership and
not as an association taxable as a corporation. See the form of legal opinion of
counsel attached hereto at Appendix E.

Effect of Classification as Corporation

     If during any taxable year there is a material  change in the law or in the
circumstances surrounding the Partnership,  the Partnership may be classified as
an association  taxable as a corporation.  If that occurs, the Partnership could
be taxed on its profits  and at rates which may be higher than those  imposed on
individuals. Any Partnership losses would only be deductible by the Partnership,
rather  than  being  allocated  among the  Partners  and  deductible  by Limited
Partners on their federal income tax returns.  See "Passive  Income and Losses."
Cash  Distributions  to Limited  Partners  would be treated as  dividends to the
extent of current and accumulated  earnings and profits of the Partnership,  and
Distributions  in excess  thereof  would be  treated as a  nontaxable  return of
capital  to the  extent  of  the  Limited  Partner's  basis  in his  Partnership
interest,  while the remainder  would be treated as capital  gain,  provided the
Limited Partner's interest in the Partnership is a capital asset.

Partners, Not Partnership, Subject to Tax

     Under the Code, the  Partnership,  as an entity,  is not subject to federal
income tax. Instead,  each Limited Partner will report on his federal income tax
return his  allocable  share,  as determined by the  Partnership  Agreement,  of
profits  and  losses  realized  by the  Partnership,  whether  or not  any  cash
Distributions  are made to the Limited  Partner during the taxable year. For the
allocation of profits and losses among Partners, see "Summary of the Partnership
Agreement - Profits,  Losses and  Distributions"  and the Partnership  Agreement
attached as Appendix B. The character of any item of profit and loss (as capital
gain or ordinary  income and as capital loss or ordinary  loss) will be the same
to the Limited Partner as it is to the Partnership.

     In addition,  subject to the passive loss rules discussed  below, a Limited
Partner is  entitled to deduct on his  federal  income tax return his  allocable
share of any  Partnership  losses to the extent the  Partner is at-risk  and has
basis in his Partnership  interest at the end of the  Partnership  year in which
such loss occurs.

     The General Partner,  in order to comply with applicable tax law, will keep
the  Partnership's  books and records and otherwise  compute  Profits and Losses
based on the  accrual  method,  and not the cash  basis  method,  of  accounting
pursuant to Section 448 of the Code.



                                      -71-
<PAGE>

     The accrual method of accounting generally records income and expenses when
they are accrued or economically incurred.

Affiliated Service Groups

     Purchase of Units in the Partnership  may cause certain  Limited  Partners,
certain   Contract   Hospitals   and  the   Partnership   to  be  treated  under
Section 414(m)  of the  Code as an  "affiliated  service  group."  Consequently,
employees of each member of any such  affiliated  service group would be treated
as  employed  in the  aggregate  by a single  employer  for  purposes of minimum
coverage,  participation,  nondiscrimination  and other  employee  benefit  plan
qualification  requirements  imposed by the Code.  In contrast,  an employer not
affiliated  with another  employer  under  Section 414(m)  of the Code need only
consider its own employees in determining  whether its employee  pension benefit
plans satisfy the Code qualification requirements.

     Aggregation  of  employers  could  cause the  retirement  plans of  certain
Limited Partners and related entities to fail to satisfy the minimum coverage or
other qualification  requirements imposed by the Code,  potentially resulting in
the disqualification of the plans for favorable tax treatment.  Disqualification
of the retirement plan of a Limited  Partner would require,  among other things,
the value of the vested retirement benefit of a highly compensated  employee who
is a participant in such  disqualified  plan to be included in his gross income,
regardless  of  whether  the  employee  is a Limited  Partner.  In the event the
Service  attempted to disqualify  the  retirement  plan of a Limited  Partner on
account of the affiliated service group rules, the  disqualification of the plan
could  potentially be avoided through  negotiation with the Service of a closing
agreement providing for correction of the disqualifying  defect and payment of a
nondeductible sanction to the United States Treasury.

     Section  414(m) of the Code and  Proposed  Regulations  thereunder  provide
three tests for  determining  whether  aggregation of all employees is required;
satisfaction  of any one of these tests  would  require  aggregation.  Under the
first test, a service organization ("First Service  Organization" or "FSO") will
be aggregated with any other service organization (an "A Organization") if the A
Organization  (i) is a partner or  shareholder  in the FSO,  and (ii)  regularly
performs  services  for the  FSO,  or is  regularly  associated  with the FSO in
performing  services for third  persons.  Whether the A  Organization  regularly
performs  services  for the  FSO,  or is  regularly  associated  with the FSO in
performing  services for third persons,  is determined on the basis of facts and
circumstances,  including the amount of income  derived from the  performance of
such services.

     Under  the  second  test,  an  FSO  will  be  aggregated   with  any  other
organization  (a  "B  Organization")  if  (i) a  significant  portion  of  the B
Organization's  business is the  performance of services for the FSO, for one or
more A Organizations with respect to the FSO, or for both, where services are of
a type historically performed in such service field by employees on December 13,
1980;  and (ii) ten  percent or more of the  interest in the B  Organization  is
held,  in the  aggregate,  by  persons  who  are  officers,  highly  compensated
employees, or the common owners of the FSO or an A Organization.



                                      -72-
<PAGE>

     An  A  Organization,   a  B  Organization,   or  an  FSO  includes  a  sole
proprietorship, partnership, corporation or any other type of entity, regardless
of how it is legally formed. An organization may be deemed to own an interest in
an FSO under the constructive  ownership rules of Section 318(a) of the Code. In
general,  these rules  provide  that a  Partnership  interest  owned by or for a
Limited Partner is considered as owned by any other  partnership in which he has
an interest  (e.g.  a medical  practice  partnership)  (for this  purpose,  an S
corporation is treated as a partnership). In addition, if a Limited Partner owns
fifty percent or more in value of the stock in a corporation,  such  corporation
is deemed to own  Partnership  interests  owned by or for such person.  Indirect
ownership (e.g.,  ownership  through a subsidiary  corporation) is considered in
applying  the  foregoing  rules.  Under these rules,  individual  ownership by a
Limited Partner in the Partnership may be attributed to the medical  practice of
such Limited Partner.  This situation will occur when the Limited Partner is (i)
a sole proprietor of his medical practice,  (ii) a partner in a medical practice
partnership, or (iii) an owner of fifty percent or more in value of the stock of
a professional corporation which constitutes his medical practice. There will be
no attribution of a Limited Partner's individual ownership in the Partnership to
a professional  corporation  (that is not an S corporation) of which the Limited
Partner is less than a fifty percent shareholder.

     The persons or entities with a risk of aggregation as A  Organizations  are
Limited Partners who are sole  proprietors,  medical practice  partnerships or S
corporations  having  a  Limited  Partner  as  a  partner  or  shareholder,   or
professional  corporations  having a Limited  Partner as a fifty percent or more
shareholder. In addition, to be an A Organization, such persons or entities must
regularly perform services for the Partnership,  or be regularly associated with
the Partnership in performing services for third persons.

     Those persons or entities  with a risk of  aggregation  as B  Organizations
would be organizations  performing  services for or on behalf of the Partnership
that are owned at least  ten  percent  in the  aggregate  by highly  compensated
employees  of the  Partnership  or of a Limited  Partner.  The only  persons  or
entities  which the General  Partner  believes could fall into this category are
the Contract  Hospitals  through which service  arrangements are made,  although
there can be no assurance  that others will not be in this category or otherwise
be subject to a  substantial  risk of  aggregation  currently  or in the future.
Aggregation of any Contract Hospital will turn on whether the highly compensated
employees of the Partnership  (if any) or of any A Organization  described above
are also ten percent or more owners of such Contract Hospitals.  The Partnership
does not intend to have any highly compensated employees.

     Under the third test, an organization  the "principal  purpose" of which is
performing on a regular and  continuing  basis  "management  functions"  for one
organization (or for one organization  and other  organizations  aggregated with
such organization under Code Section 414) (the "Management  Organization")  will
be aggregated  with the  organization  (and  organizations  aggregated with such
organization  under Code Sections  144(a)(3) and 414) for which such  management
functions are performed (the "Recipient  Organization").  The only guidance with
respect to the meaning of management  functions was provided in former Temporary
Regulations. In 1992, those Temporary Regulations were withdrawn by the Service.
The Temporary  Regulations provided that management functions include only those
services and activities which have been


                                      -73-
<PAGE>

historically  performed  by employees  in the  business  field of the  Recipient
Organization  on  September  3,  1982.  Such  services  and  activities  include
determining,  implementing or supervising daily business operations,  personnel,
employee  compensation  and benefits,  short-and-long-range  business  planning,
organizational  structure and ownership,  and any  professional  services (e.g.,
medical  services)  that  relate  to  the  foregoing  services  and  activities.
Generally, an organization's  principal business will be management functions if
the  performance  of  management  functions  and other  services for a Recipient
Organization during the current and preceding taxable year constitutes more than
50% of the  Management  Organization's  business  activities.  Those  persons or
entities  with a risk  of  aggregation  as  Management  Organizations  would  be
organizations  performing  management  functions for the Partnership  where more
than 50% of the gross  receipts of the  organization  for the relevant  two-year
period stem from the  performance  of such  functions for the  Partnership.  The
General  Partner does not believe  that a physician  Limited  Partner's  medical
practice will fall into this category.

     By enacting Section 414(m), Congress attempted to prohibit the exclusion of
nonprofessional   employees   from  the  employee   benefit   plans  of  certain
professional   organizations.   Section  414(m)(1)   provides  that  regulations
thereunder  may limit the  extent to which all  employees  of the  members of an
affiliated  service group will be treated as employed by a single employer.  The
Preamble to the Proposed  Regulations  recognizes  that Section  414(m) and such
regulations  may require  aggregation  in  situations in which there has been no
attempt to avoid the employee benefit requirements listed in Section 414(m). The
Proposed  Regulations  provide  that the  Commissioner  of Internal  Revenue may
determine that certain organizations,  or types of organizations,  should not be
considered  as subject to the  requirements  of Section  414(m) even though they
otherwise  meet the conditions for  aggregation.  The General  Partner and legal
counsel to the  Partnership  do not believe that the  contemplated  arrangements
among the Partnership,  Limited Partners, General Partner and Contract Hospitals
is the type of  arrangements  that  Section  414(m) is intended to address;  the
General  Partner  and legal  counsel  to the  Partnership  have been  informally
advised by officials of the Service that the Service would not likely attempt to
apply  the  affiliated  service  group  rules  to the  arrangements;  and in the
experience  of the General  Partner and legal  counsel to the  Partnership,  the
Service has not attempted to apply the affiliated service group rules to similar
arrangements in the past. The informal  discussions  with the Service,  however,
are not binding on the Service,  and there is no guarantee that the Service will
not apply the affiliated service group rules to the arrangement.

     As the  provisions  of Code  Section  414(m) and the  Proposed  Regulations
thereunder are complex and may apply  differently to each Investor  depending on
his or her own circumstances,  Investors are urged to consult with their own tax
advisers before investing in the Partnership.

     INVESTORS  ARE URGED TO CONSULT WITH THEIR OWN TAX ADVISORS  REGARDING  THE
APPLICABILITY  OF THE  AFFILIATED  SERVICE GROUP RULES  DESCRIBED  HEREIN TO THE
EMPLOYEE BENEFIT PLANS MAINTAINED BY THEM OR THEIR MEDICAL PRACTICES.



                                      -74-
<PAGE>

Passive Income and Losses

     The  Partnership  expects and the Financial  Projections  forecast that the
Partnership  will realize taxable income and not taxable losses during its first
five full years of operation.  Nevertheless,  if certain  assumptions upon which
the  Financial  Projections  are  based  do  not  materialize,  there  can be no
assurance that the Partnership  will not realize taxable losses,  in which event
the use of such losses by the Limited Partners will generally be limited by Code
Section  469.  See  "Risk   Factors  -  Other   Investment   Risks -   Financial
Projections."

     Code  Section  469  provides  limitations  for  the use of  taxable  losses
attributable  to "passive  activities."  Code Section 469 operates  generally to
prohibit  passive  losses from being used  except  against  income from  passive
activities.

     The passive activity rules apply to individuals (which includes individuals
who are partners in partnerships or  shareholders in S  corporations),  estates,
trusts,  "personal service  corporations"  and "closely held" C corporations.  A
"personal  service  corporation"  is defined as a  corporation  whose  principal
activity is the  performance  of personal  services  substantially  performed by
employee-owners,  but only if the employee-owners in the aggregate own more than
10% of the stock of the corporation by value (not number of shares).  A "closely
held " corporation is defined for purposes of these rules as a corporation where
5 or fewer shareholders own, directly or indirectly,  more than 50% of the stock
value of the corporation,  at any time during the last half of the taxable year.
A special rule applies to  closely-held  C  corporations  which are not personal
service  corporations;  these corporations can offset passive losses against any
income except portfolio income.

     Recently  promulgated  Regulations  set forth rules for  grouping  trade or
business  activities and rental  activities for purposes of applying the passive
activity  rules.  One or more  trade or  business,  or rental  activity  will be
treated  as a single  activity  if the  activities  constitute  an  "appropriate
economic  unit" for the  measurement  of gain or loss. All of the relevant facts
and  circumstances  are to be examined to determine if an  appropriate  economic
unit exists.  A taxpayer may use any reasonable  method of applying the relevant
facts and circumstances in grouping  activities;  however, a rental activity may
not be grouped with a trade or business activity unless one of the activities is
insubstantial in relation to the other activity. The Regulations state that five
factors,  not all of which are  necessary  for a taxpayer to treat more than one
activity as a single  activity,  are given the  greatest  weight in  determining
whether activities  constitute an appropriate  economic unit. Those five factors
are: 1) similarities  and  differences in types of businesses;  2) the extent of
common control; 3) the extent of common ownership; 4) geographical location; and
5) interdependence between the activities.

     Once a taxpayer has grouped activities into appropriate economic units, the
taxpayer may not regroup or separate the activities in subsequent  taxable years
unless the  original  grouping  was  clearly  inappropriate  or there has been a
material change in the facts and circumstances  that makes the original grouping
clearly inappropriate. The Service may regroup activities if: a) the


                                      -75-
<PAGE>

taxpayer's grouping fails to reflect one or more appropriate  economic units and
b) one of the primary  purposes of the taxpayer's  grouping is to circumvent the
passive loss rules.

     A limited  partnership is required to group its activities and its partners
are bound by the grouping  done at the  partnership  level.  A partner must then
group  the  partnership   activity  with  activities  he  conducts  directly  or
indirectly  through other  partnerships  or S  corporations,  if the  activities
constitute an appropriate economic unit.

     The passive activity limitations apply only to a trade,  business or rental
activity in which the taxpayer does not materially participate. Code Section 469
provides generally that a limited partner's interest in a limited partnership is
always  a  passive  activity  interest  because  a  limited  partner  can  never
materially participate in the trade or business of the partnership.  Regulations
provide two  important  exceptions to this general rule for  individual  limited
partners.  First, a partnership interest is not treated as a limited partnership
interest  if the  individual  also owns an  interest  in such  partnership  as a
general partner at all times during the  partnership's  taxable year.  Second, a
limited partner is treated as materially  participating in an activity if he (i)
participates  in the activity  for more than 500 hours during the taxable  year,
(ii)  materially  participated in the activity for any five taxable years during
the preceding ten taxable years, or (iii) materially  participated for any three
preceding  taxable years in a personal  service  activity.  For purposes of this
rule, an activity refers to a single activity or appropriate economic unit if it
involves  the  performance  of personal  services in the fields of health,  law,
engineering,  architecture,  accounting,  actuarial science,  performing arts or
consulting  or any other trade or  business  in which  capital is not a material
income  producing  factor.  "Participation"  generally means any work done by an
individual  in  connection  with an  activity  in  which he  owns,  directly  or
indirectly,  an interest at the time the work is done. The capacity in which the
individual performs the work is immaterial.

     The General  Partner  plans to treat the  Partnership  business as a single
activity.  While  certain  qualified  physician  Limited  Partners  will perform
services  using the  Partnership's  Mobile  Lithotripsy  Systems (see  "Proposed
Activities   -   Operation   of   the   Mobile   Lithotripsy    System"),    the
General Partner does  not  anticipate  that any such Limited  Partner will spend
more than 500 hours during a taxable year in the  performance  of such services.
The General Partner expects,  however,  that certain  physician Limited Partners
will be engaged in a trade or business  activity outside the  Partnership.  Each
Limited  Partner  must  determine,  based  on  all  of the  relevant  facts  and
circumstances,  whether the Partnership business and any other activities of the
Limited  Partner  should be combined  into a single  activity.  The  Regulations
provide that a physician's  own medical  practice and income  derived  through a
limited   partnership  may  constitute  a  single   activity,   particularly  if
substantially all of the  partnership's  services are provided to the doctors or
their  patients  and such  services  are provided to the patients in roughly the
same  proportion  as the  doctors'  interests in the  Partnership.  The services
provided by the  Partnership  will not be limited to  patients of the  physician
Limited Partners. Furthermore, the Partnership will not be providing services to
patients of physician Limited Partners based upon the ownership interests of the
physician  Limited  Partners.  Both of these factors would tend to argue against
grouping the Partnership  activity with the individual medical practice activity
of a physician  Limited  Partner.  Due to the factual  nature of the inquiry and
lack of  authority  in this  area,  Counsel  is unable to give an  opinion as to
whether an


                                      -76-
<PAGE>

individual  physician  Limited Partner will be required to treat the Partnership
trade or business and his own medical practice as a single activity.

     If a physician Limited Partner must combine his separate activities and the
Partnership  activity into a single activity,  the hours of participation of the
physician  Limited  Partner in his separate  medical  practice  would have to be
aggregated  with his hours of  participation  in the  Partnership.  The  General
Partner expects that the physician Limited Partner's total hours will exceed 500
since the physician  Limited  Partner will have spent more than 500 hours in his
own private practice.  Thus, such a Limited Partner will be deemed to materially
participate in the Partnership  for the taxable year and, as a consequence,  the
Partnership income allocable to such Partner will be active income.

     Even if the 500 hour threshold is not met, the material participation rules
may apply to certain Limited Partners.  Regulation Section  1.469-5(j)  provides
that for purposes of the rules regarding  material  participation in five of the
preceding ten taxable  years and material  participation  in a personal  service
activity for any three  preceding  taxable  years,  an individual has materially
participated  in an  activity  for a  preceding  taxable  year if such  activity
includes  significant  activities that are substantially the same as significant
activities  that were  included in an activity in which the taxpayer  materially
participated  for such preceding  taxable year. The  Regulations do not define a
significant  activity nor do the Regulations  specify when such an activity will
be substantially the same as a prior year's activity for purposes of determining
whether material participation exists.

     The General Partner realizes that the physician Limited Partners have spent
more than 500 hours in,  and thus have  materially  participated  in,  their own
private  practices  in  preceding  taxable  years and will  continue to do so in
future  taxable  years.  Due to the factual nature of the inquiry into the prior
activities of individual  Limited  Partners and the lack of regulations or other
authority  explaining  when an  activity  is  substantially  the same as a prior
year's activity,  Counsel is unable to give an opinion as to whether any Limited
Partners will be deemed to be materially  participating in the Partnership under
the provisions of Regulation Section 1.469-5(j).

     In the event that a Limited Partner is deemed to materially  participate in
the  Partnership,  such Limited  Partner's share of Partnership  Profits will be
active income which cannot be used to offset passive  activity  losses,  and his
share  of  Partnership  Losses,  if  any,  may be  used to  offset  income  from
nonpassive  activity sources,  such as active business income,  salary income or
portfolio  income (i.e.,  gross income from  interest,  dividends,  annuities or
royalties  not derived in the ordinary  course of a trade or  business).  On the
other  hand,  if the  Limited  Partner has not  materially  participated  in the
Partnership,  Code Section 469 will generally prohibit such Limited Partner from
using  Partnership  Losses,  if any,  to offset  income  from  other  nonpassive
activity  sources.  Disallowed  passive losses are deferred and carried  forward
indefinitely until the taxpayer has passive income to offset.

     Upon the  taxable  disposition  to an  unrelated  party of all of a passive
activity,  or a substantial  part of a passive activity that may be treated as a
separate activity,  any unused deferred loss allocable to that passive activity,
or to that substantial part of the passive activity that is treated


                                      -77-
<PAGE>

as a  separate  activity,  can be used to  reduce  any gain  realized  upon such
disposition,  with any excess loss  available  for  deduction  first against any
other passive  income and then in full against any other income or gain from any
source.  The  Regulations do not specify what  constitutes  the disposition of a
substantial part of an activity for purposes of this rule. Investors should note
that an  investment  in Units is a  long-term  investment  and that the  General
Partner  anticipates  that the Partnership  will operate the Mobile  Lithotripsy
Systems for an indefinite period of time.  Investors should also note that there
is no market for the resale of Units,  and that any such  resale will be subject
to various  restrictions  imposed by federal and state  securities  laws and the
Partnership  Agreement.  See the form of the Partnership  Agreement  attached as
Appendix B and "Summary of the Partnership  Agreement - Restrictions on Transfer
of Partnership Interests."

     The General Partner expects and the Financial Projections forecast that the
Partnership  will  realize  taxable  income  beginning in the first full year of
operations,  and for each year thereafter during the projected five-year period.
Thus, it is expected that the Partnership  will provide the Limited Partners who
do not materially  participate in the Partnership  with passive  activity income
which can generally be used by the Limited  Partners to offset passive  activity
losses from other sources and previously disallowed  Partnership passive losses,
if any.

     Investors  should note,  however,  that the Temporary  Regulations  contain
special rules which  recharacterize  passive  activity  income as active income.
Specifically,  Section  1.469-2T(f)(2)  requires  the  recharacterization  of an
amount of the passive activity gross income from each "significant participation
passive activity" ("SPA" ) if the taxpayer's  passive activity gross income from
all SPAs in which the taxpayer owns an interest for the taxable year exceeds the
taxpayer's  passive activity  deductions from all such activities for such year.
For  purposes  of  this  rule,  a SPA  is an  activity  in  which  the  taxpayer
participates  for more than 100 hours but does not materially  participate.  The
interest of a Limited  Partner who will  perform  services  using a  Partnership
Lithotripter  under  arrangements  with  an  Contract  Hospital  (see  "Proposed
Activities  -  Operation  of the  Mobile  Lithotripsy  Systems")  will  be a SPA
interest if such Limited  Partner spends more than 100 hours during each year in
the performance of such services. The same conclusion is valid for any physician
Limited Partner that the General  Partner hires to be a Medical  Director of any
Mobile Lithotripsy System. Also, if a Limited Partner is required to combine the
Partnership  activity  and  other  activities  into a single  activity,  Limited
Partners who have performed more than 100 but less than 500 hours of service for
the  combined  activity  annually  will be deemed to own an SPA  interest in the
Partnership.  The  importance  of this rule is that it will  treat the  affected
Limited Partners' shares of Partnership  income as active income which cannot be
offset against passive activity losses, but their shares of Partnership  Losses,
if any, will be treated as passive  activity  losses subject to the Code Section
469 limitations.

     THE PASSIVE  ACTIVITY  LOSS RULES WILL AFFECT  EACH  INVESTOR  DIFFERENTLY,
DEPENDING ON HIS OWN TAX  SITUATION.  EACH INVESTOR  SHOULD CONSULT WITH HIS OWN
TAX ADVISOR TO  DETERMINE  THE EFFECT OF THESE RULES ON THE INVESTOR IN LIGHT OF
THE INVESTOR'S INDIVIDUAL FACTS AND CIRCUMSTANCES.



                                      -78-
<PAGE>

Depreciation

     The Financial Projections assume that the Partnership will use the Modified
Accelerated  Cost Recovery System  ("MACRS") to depreciate the cost of any newly
acquired equipment. Further, the Financial Projections assume that any additions
or  improvements  to the  Mobile  Lithotripsy  Systems  and any newly  purchased
equipment  will be completed  and placed into service  after January 1, 1999 but
prior to October 1, 1999,  and that the mid-year  convention  will apply.  It is
assumed that any additions or improvements to any Mobile Lithotripsy  System, as
well as the cost of any newly purchased equipment, will also be depreciated over
a five year term under the MACRS method of depreciation using the 200% declining
balance  method,   switching  to  the  straight-line   method  to  maximize  the
depreciation  allowance.  In such case, the  Partnership  will claim only a half
year of  depreciation  for these  items in its  first  year of  operations.  The
Partnership  will  depreciate  the  Contributed  Assets,  including  the  Mobile
Lithotripsy  Systems  being  contributed,  utilizing a carryover  basis over the
remainder of their  useful lives and pursuant to MACRS using the 200%  declining
method of depreciation,  switching to the  straight-line  method to maximize the
depreciation allowance.

     As under  prior  law,  the  1986 Act  provides  that  the  full  amount  of
depreciation on personal  property (such as the Mobile  Lithotripsy  Systems) is
recaptured upon  disposition  (i.e., is taxed as ordinary  income) to the extent
gain is realized  on the  disposition.  Investors  should note that the 1986 Act
repealed the investment tax credit for all personal property.

Partnership Allocations

     The Partnership Agreement specifies the Partners' shares of Profits, Losses
and   Distributions,   and  the  Financial   Projections   are  based  upon  the
effectiveness  of the  allocations  so  specified.  See "Summary of  Partnership
Agreement  -  Profits,  Losses  and  Distributions."  The Tax Reform Act of 1976
amended  Section  704(b) of the Code to  provide  that  special  allocations  of
income, gain, loss,  deduction or credit, or items thereof,  will be disregarded
if such  allocations  do not  have  "substantial  economic  effect."  While  the
Congressional   Committees'  reports  do  not  extensively  define  "substantial
economic  effect," the Senate Finance  Committee Report indicates that generally
an allocation has  "substantial  economic  effect" if it may actually affect the
dollar amount of the partners'  shares of the total  partnership  income or loss
independent of tax  consequences.  If an allocation lacks  substantial  economic
effect,  such  allocation  will be  reallocated  on the basis of each  partner's
proportionate  interest in the partnership in question,  "based on all the facts
and  circumstances."  According to the staff of the Joint Committee on Taxation,
"General Explanation of the TRA of 1976," 94th Cong. 2d Sess. 95 N.6 (1976), the
capital  accounts of the  partners  are to be utilized  to  determine  whether a
special  allocation  has  substantial  economic  effect  if  the  allocation  is
reflected  as an increase or  decrease  in a partner's  capital  account and the
capital  accounts of the partners  actually  reflect the dollar amounts that the
partners will receive upon liquidation of the partnership.

     The Treasury  Department  issued final  Regulations under Section 704(b) of
the Code,  effective  December  31,  1985,  which offer  objective  criteria for
determining whether an allocation


                                      -79-
<PAGE>

has  "substantial  economic  effect"  and will be  respected.  While  the  final
Regulations   are  quite  complex  and  could  be  interpreted   such  that  the
Partnership's  allocations would not be sustained, it is Counsel's opinion that,
if litigated, it is more likely than not that the allocations as provided in the
Partnership Agreement would be sustained.

     Investors are cautioned  that the foregoing  analysis and  conclusions  are
based upon extremely  complex final Regulations which have not been construed or
interpreted  by the courts.  The  Partnership  Agreement  authorizes the General
Partner to make  amendments  as  necessary  in order to permit  the  Partnership
allocations  to be sustained for federal  income tax purposes,  but only if such
amendments do not materially  affect adversely the rights and obligations of the
Limited Partners.  Otherwise,  any amendment must be approved by the vote of the
General  Partner  and a Majority in  Interest  of the  Limited  Partners.  If an
amendment to the  Partnership  Agreement  were  required in order to sustain the
Partnership  allocations for federal income tax purposes,  there is no assurance
that such an  amendment  would be possible  or, if it were,  that the rights and
obligations  of the Limited  Partners  might not be  adversely  affected in some
manner which cannot be  ascertained at this time.  Investors  should be aware of
the risks which are inherent in this complex and developing area of the law.

     The  Code  prohibits  the  allocation  of  items  of  income,  gain,  loss,
deductions  or credits to a partner  where such items are earned,  incurred,  or
accrued prior to the time such partner became a partner.  This varying  interest
rule effectively  prohibits  partnerships from  retroactively  allocating a full
share of  partnership  items for a taxable year to persons who were  partners in
the  partnership  for only a portion of the taxable year.  Section 706(d) of the
Code limits rules which otherwise permit the partnership to amend the allocation
provisions  of the  Partnership  Agreement for a taxable year until the due date
for the  partnership  tax return for that year.  Regulations  provide  that if a
change in the  partners'  interests in the  partnership  occurs as a result of a
partner's  sale of his entire  interest in the  partnership,  the  partnership's
taxable year closes with respect to the transferor partner. Thus, the transferor
partner has no interest in  partnership  items incurred after he disposes of his
interest;  conversely,  the  transferee  partner has no interest in  partnership
items incurred before that date. Although,  the partnership's  taxable year does
not close with respect to a partner who sells or exchanges  less than his entire
interest  or whose  interest  is  reduced by an event such as the entry of a new
partner  into the  partnership  or a gift of a  partner's  interest  to  another
person,  the varying interest rule requires  allocations of partnership items to
old and new partners to reflect the changes in their percentage interests.

     Regulations  sets forth two methods for taking into  account the  partners'
varying  interests  in a  partnership  in cases where a partner  disposes of his
entire  interest in a partnership  (in which case the  partnership  taxable year
closes as to him). The legislative  history to the 1976 revisions to the varying
interest  rule  states  that  new  regulations  "are  to  apply"  the  same  two
alternative  methods  of  computing  allocations  for  purposes  of the  varying
interest rule where no partner disposes of his entire interest.

     In the case of a disposition of a partner's entire partnership  interest by
sale,  exchange,  or liquidation,  the  Regulations  provide that the allocation
between transferor and transferee may be


                                      -80-
<PAGE>

made by actually closing the partnership books and calculating the exact taxable
income or loss for the period  ending on the date of the  transfer.  The interim
closing allows tracing of  partnership  items to the segment of the  partnership
taxable year in which they were incurred.  Under this method, a person who was a
partner  for  only  a  portion  of the  taxable  year  would  be  allocated  his
distributive  share of only those items that actually  were incurred  during the
time he was a member of the partnership.
 
     The Regulations  provide that a partnership can avoid an interim closing of
the books if the partners  agree to permit the  transferor  partner to take into
account a pro rata  amount of the items he would have  included  in his  taxable
income if he had remained a partner for the entire taxable year. The Regulations
state that the  proration  may be based on the portion of the taxable  year that
elapsed before the change in interests,  but that the  partnership  may use "any
other method that is reasonable."
 
     The  Partnership  Agreement  provides  that  items of income,  gain,  loss,
deductions, and credits will be allocated between the transferor partner and the
transferee  partner under the proration  method  described  above.  That is, the
items of income,  gain,  loss,  deductions  and credits will be allocated in the
same  ratio as the  number of days in the year  before and after the date of the
transfer or admission,  unless the  Partnership has sold any of its asset in the
year of the transfer or admission. If the Partnership has sold any of its assets
in the year of the transfer or admission, then the General Partner may elect, in
its sole  discretion,  to use the interim closing of the books method  described
above.  Accordingly,  Investors may be allocated  items of income and loss which
may be accrued prior to the Investor becoming a Limited Partner.

Tax Treatment Of Certain Fees and Expenses Paid By The Partnership

     In General.  Under the Code, a partnership  expenditure  will, as a general
rule,  fall into one of the following  categories:  (1)  deductible  expenses --
expenditures  such as  interest,  taxes,  and ordinary  and  necessary  business
expenses  which  the  partnership  is  entitled  to  deduct in full when paid or
incurred;  (2)  amortizable  expenses --  expenditures  which the partnership is
entitled to amortize  (i.e.,  deduct  ratably) over a fixed period of time;  (3)
capital  expenditures -- expenditures which must be added to the amortization or
depreciation  base of partnership  property (or partnership  loans) and deducted
over a period of time as the  property  (or  partnership  loan) is  amortized or
depreciated;   (4)  organization   expenses  --  expenditures   related  to  the
organization  of the  partnership,  which  under  Section  709 of the  Code  are
amortized  over a 60-month  period,  provided an election to do so is made;  (5)
syndication  expenses  --expenditures  paid or incurred in promoting the sale of
interests  in the  partnership,  which  under  Section  709 of the Code  must be
capitalized but may be neither depreciated,  amortized,  nor otherwise deducted;
(6) partnership distributions -- payments to partners representing distributions
of partnership funds, which may be neither capitalized,  amortized nor deducted;
(7)  start-up  expenses  --  expenditures  incurred by a  partnership  during an
initial  period,  which under  Section 195 of the Code may be  amortized  over a
60-month period; and (8) guaranteed payments to partners -- payments to partners
for  services  or use of capital  which are  deductible  or treated in the other
categories  of  expenditures  listed above,  provided  they meet the  applicable
requirements.


                                      -81-
<PAGE>

     Several  amendments to the Code enacted by the Tax Reform Act of 1984 alter
established  tax  accounting  principles.  One or more of these  amendments  may
affect the federal income tax treatment of fees and expenses,  particularly fees
paid or incurred by a partnership for services. In particular,  new Code Section
461(h) now provides that an expense or fee paid to a service provider may not be
accrued for federal income tax purposes prior to the time "economic performance"
occurs.  "Economic  performance"  occurs  as (and no sooner  than)  the  service
provider provides the required services.

     All expenditures of the Partnership must constitute  ordinary and necessary
business  expenses  in order to be  deducted  by the  Partnership  when  paid or
incurred, unless the deduction of any such item is otherwise expressly permitted
by the Code (e.g.,  taxes).  Expenditures must also be reasonable in amount. The
Service  could  challenge a fee deducted by the  Partnership  on the ground that
such fee is a  capital  expenditure,  which  must  either be  amortized  over an
extended  period or indefinitely  deferred,  rather than deducted as an ordinary
and necessary  business expense.  The Service could also challenge the deduction
of any fee on the basis that the amount of such fee exceeds the reasonable value
of the  services  performed,  the goods  acquired  or the other  benefits to the
Partnership.

     Under  Section  482 of the  Code,  the  Service  has  broad  discretion  to
reallocate  income,  deductions,  credits or  allowances  between  entities with
common  ownership  or  control if it is  determined  that such  reallocation  is
necessary  to prevent  the  evasion  of taxes or to  reflect  the income of such
entities.  The Partnership and the General Partner are entities to which Section
482 applies and it is possible that the Service could contend that certain items
should be reallocated in a manner that would change the  Partnership's  proposed
tax treatment of such items. See the Financial  Projections attached as Appendix
A.

     The General  Partner  believes  the payments to it and its  Affiliates  are
customary  and  reasonable  payments  for the  services  rendered by them to the
Partnership;   however,   these  fees  were  not   determined  by  arm's  length
negotiations.  Nothing has come to the  attention of Counsel to the  Partnership
which would give  Counsel  reasonable  cause to question  the General  Partner's
determination. On audit the Service may challenge such payments and contend that
the amount paid for the services exceeds the reasonable value of those services.
Because of the  factual  nature of the  question  of the  reasonableness  of any
particular fee,  Counsel to the Partnership  cannot express an opinion as to the
outcome  of the  reasonableness  of the  amount of any fee  should  the issue be
litigated.

     The Partnership  will incur certain legal,  accounting,  and other expenses
related to the Asset  Contribution  and its  formation.  Under  current  Federal
income tax law, no deduction is allowed for expenses  relating to the  foregoing
and  such  expenses  must  be  capitalized.  Consequently,  no  Partner  will be
allocated any portion of such  capitalized  expenses.  It is expected that these
expenses will be paid out of the proceeds of the Offering and  Partnership  Cash
Flow.

     Organizational  and Syndication  Expenses.  Section 709 of the Code permits
certain costs relating to the organization of a partnership to be amortized over
a period of not less than 60


                                      -82-
<PAGE>

months,  but prohibits a partnership from deducting or amortizing those costs of
forming the partnership  that do not strictly relate to the  organization of the
partnership,  or that are incurred to promote the sale of partnership  interests
(i.e.,   syndication   expenses).   The  Regulations   provide  definitions  for
organizational  expenses that are deductible and syndication  expenses that must
be capitalized and explain how the amortization election is made. Organizational
expenses  include  legal fees for  services  incident to the  organization  of a
partnership,  such as negotiation  and  preparation of a partnership  agreement,
accounting fees for services incident to the organization of the partnership and
filing fees.  Syndication  expenses include brokerage fees,  registration  fees,
legal  fees  for  securities   advice,   accounting   fees  for  preparation  of
representations to be included in the offering materials,  and printing costs of
the  offering  materials.  The  Partnership  intends to treat the entire  amount
payable to the Sales Agent as a sales  commission for selling the Units, as well
as  certain  other  fees  and  expenses  allocable  to the  preparation  of this
Memorandum   and  to  the  offering  of  the  Units  in  the   Partnership,   as
nondeductible, nonamortizable syndication expenses.

     The Partnership  intends to amortize,  over a 60-month period, that portion
of the costs of forming the Partnership that is attributable to the organization
of the entity,  pursuant to the  Regulations.  The Service may take the position
that some  portion  or all of these  costs  relate  to  matters  other  than the
organization  of the  Partnership  and fail to qualify as  amortizable  expenses
under Section 709 and, therefore,  must be capitalized rather than deducted. The
General  Partner   believes  that  the  various   expenses  have  been  properly
characterized.  Because the allocation of these expenses is a factual  question,
Counsel to the  Partnership  cannot  predict the outcome should the character of
certain expenses be challenged on audit.

     Investors will  economically bear their respective  proportionate  share of
organizational  and syndication  expenses as these costs likely will be paid out
of proceeds from the Offering.  These costs will be borne  irrespective of their
amount,  timing and  ability of the  Partnership  to deduct  these costs for tax
purposes.

     Start-Up  Expenditures.  Section 195 of the Code permits costs  relating to
the  investigation  and  establishment  of an  active  trade or  business  to be
amortized over a period of not less than 60 months.  The Partnership  intends to
amortize,  over a 60-month  period,  that  portion of the costs  incurred by the
Partnership prior to the time the business of the Partnership commences that are
attributable  to the  investigation  and  establishment  of such  business.  The
Service may take the position  that some portion or all of these costs relate to
matters other than the  investigation  and  establishment  of the  Partnership's
business  and fail to qualify as  amortizable  expenses  under  Section 195 and,
therefore,  must be  capitalized  rather  than  deducted.  The  General  Partner
believes that the various expenses have been properly characterized. Because the
allocation of these expenses is a factual  question,  Counsel to the Partnership
cannot  predict  the  outcome  should  the  character  of  certain  expenses  be
challenged on audit.

     Investors will  economically bear their respective  proportionate  share of
start-up  expenditures  as these costs likely will be paid out of proceeds  from
the Offering. These costs will be borne irrespective of their amount, timing and
ability of the Partnership to deduct these costs for tax purposes.


                                      -83-
<PAGE>

     Management Fee to General  Partner.  The  Partnership  will pay the General
Partner  a monthly  management  fee  equal to the  greater  of $8,000 or 7.5% of
Partnership  Cash Flow per month. The management fee will be paid to the General
Partner  for the time and  attention  to be  devoted by it for  supervising  and
coordinating the management and  administration of the day-to-day  operations of
the Mobile Lithotripsy Systems pursuant to the terms of the Management Agreement
attached as  Appendix  D. See  "Compensation  and  Reimbursement  to the General
Partner and its  Affiliates."  The Partnership  intends to deduct the management
fee in full in the year  paid.  Assuming  the  management  fee to be paid to the
General  Partner is  ordinary,  necessary  and  reasonable  in  relation  to the
services provided, Counsel is of the opinion that the Partnership may deduct the
management fee in full in the year paid.

Partnership Elections

     The  Code  permits  partnerships  to  make  elections  for the  purpose  of
adjusting the basis of partnership property on the distribution of property by a
partnership  to a partner and on the transfer of an interest in a partnership by
sale or  exchange  or on the  death of a  partner.  The  general  effect of such
elections is that transferees of Partnership  interests will be treated, for the
purposes of  depreciation  and gain, as though they had a direct interest in the
Partnership's  assets, and the difference between their adjusted bases for their
interests and their allocable portion of the Partnership's bases for its assets
will be  allocated to such assets based upon the fair market value of the assets
at the times of transfers of the interests. Any such election, once made, cannot
be  revoked  without  the  consent  of  the  Service.  Under  the  terms  of the
Partnership  Agreement,  the General  Partner,  in its discretion,  may make the
requisite election necessary to effect such adjustment in basis.

     The Code requires partnerships having partners who contribute property with
a  basis  different  than  the  property's  fair  market  value  on the  date of
contribution  to eliminate  that  disparity  utilizing  any one of three methods
described in Treasury  Regulations  promulgated  under Code Section 704(c) - the
traditional  method,  the curative method,  or the curative method with remedial
allocations. In the case of the Partnership, the General Partner has contributed
the  Contributed  Assets which in the  aggregate  have a tax basis  greater than
their fair market value.  However,  certain of the Contributed Assets may have a
tax basis  less than  their  fair  market  value.  Code  Section  704(c) and the
Regulations thereunder provide for methods by which to eliminate,  or attempt to
eliminate,  these  disparities.  They also govern the allocation of depreciation
with respect to  contributed  property  where the tax basis of the property does
not equal its fair market value. They will require the Partnership to attempt to
eliminate these  differences  utilizing any one of the above three methods.  The
General  Partner,  in its  discretion,  may elect which of the three  methods to
utilize to account for the  difference in tax basis and fair market value of the
Contributed Assets in the aggregate and on an individual basis.

Taxable Income

     The Partnership  Agreement  provides that in each year of the  Partnership,
annual  Distributions may be made to the Partners.  Excluded from the definition
of cash available for


                                      -84-
<PAGE>

Distributions, however, is the amount of funds necessary to amortize Partnership
debts and to maintain  certain  cash  reserves  deemed  necessary by the General
Partner.  See "Proposed  Activities - Funding for Partnership  Activities."  The
Partnership will also incur significant  up-front capital costs that may have to
be paid out of Partnership  revenues.  Thus, taxable income may very well exceed
cash available for distribution in the Partnership's initial year of operations.
Because of the  circumstances  outlined  above,  if Partnership  cash flow falls
substantially below the estimates as set forth in the Financial  Projections,  a
Limited  Partner could be subject to income taxes payable out of personal  funds
to the extent of the  Partnership's  income,  if any,  attributed to him without
receiving from the Partnership  sufficient cash to pay the Limited Partner's tax
with respect to such income.

Cash Distributions and Determination of Basis

     Under the Partnership  Agreement,  the  Partnership  will distribute to the
Partners cash flow realized from the operation of the Mobile Lithotripsy Systems
and sales  proceeds  realized on a sale of  Partnership  property,  if any.  See
"Summary of Partnership Agreement."

     Generally,  a Distribution  of cash by the Partnership to a Limited Partner
will be taxable to the Limited Partner only to the extent that the  Distribution
exceeds  the  Limited  Partner's  basis  for  his  Partnership   Interest.   Any
Distribution of cash in excess of a Limited  Partner's basis for his Partnership
Interest will generally be taxable as capital gain assuming that the Partnership
Interest  constitutes  a capital  asset in the hands of the Limited  Partner.  A
Limited  Partner's basis for his Partnership  Interest is equal to the amount of
cash contributed by the Limited Partner to the Part nership through the purchase
of his Partnership  Interest increased by Profits allocated to such interest and
decreased  by Losses  allocated  to such  interest  and all  Distributions  with
respect to such interest.

     The General Partner  anticipates that  Partnership Cash Flow  distributions
will not exceed the  Limited  Partners'  basis in their  Partnership  Interests,
thus, under such  circumstances,  the Limited Partners should avoid taxable gain
upon receipt of Partnership Cash Flow distributions and constructive  receipt of
their  share of the deemed  distributions,  if any.  There can be no  assurance,
however,  that the Partnership will not realize any Losses or that Distributions
will not exceed the  amounts  forecast,  or that  Profits  will be less than the
amounts  forecast,  in which event the Limited  Partners may not have sufficient
tax basis in their  Partnership  Interests to avoid taxable gain from receipt of
Partnership  Distributions and constructive receipt of their share of any deemed
distributions.

     THE REGULATIONS  ARE VERY COMPLEX.  THE GENERAL PARTNER URGES EACH INVESTOR
TO CONSULT WITH HIS OWN TAX ADVISOR TO DETERMINE  THE EFFECT OF THE  REGULATIONS
ON THE TAX CONSEQUENCES OF AN INVESTMENT IN THE PARTNERSHIP, PARTICULARLY IN THE
EVENT  THE  PARTNERSHIP  PROFITS  ARE LESS  THAN  THE  AMOUNTS  FORECAST  OR THE
PARTNERSHIP REALIZES LOSSES.


                                      -85-
<PAGE>

Sale of Partnership Units

     Gain  realized  on the  sale of  Units by a  Limited  Partner  who is not a
"dealer" in Units or in limited  partnership  interests will be taxed as capital
gain, except that the portion of the sales price attributable to inventory items
and  unrealized  receivables  will be  taxed  as  ordinary  income.  "Unrealized
receivables"  of the  Partnership  include  the Limited  Partner's  share of the
ordinary income that the Partnership  would realize as a result of the recapture
of depreciation  (as described  above) if the  Partnership had sold  Partnership
depreciable  property  immediately before the Limited Partner sold his interest.
Investors  should  note  that  the  IRS  Restructuring  and  Reform  Act of 1998
generally  imposes a maximum tax rate of 20% on net long-term  capital gains. To
the extent the  Partnership has income  attributable  to depreciation  recapture
incurred on the sale of a capital asset,  such income will be taxed at a maximum
rate of 25%. The Revenue  Reconciliation Act of 1993 imposed a maximum potential
individual income tax rate of 39.6% on ordinary income.

Further Changes in Tax Laws

     In the  foregoing  discussion,  an attempt has been made to  summarize  the
effects of certain  provisions of recent tax  legislation  which would appear to
affect the tax consequences to an Investor in the Partnership. It is, of course,
not  possible  to  discuss  all  of the  changes  in the  Code  effected  by all
amendments  enacted over the last several years which might  adversely  affect a
Limited  Partner.  Consequently,  each  Investor is urged to consult his own tax
counsel in this regard. It should also be noted that other proposals for changes
in the Code have been made  which  might be adopted at some later date and could
have an adverse impact on the Limited Partners.

Local and State Taxes

     The  Partnership is organized  under the laws of the State of Tennessee and
its operations are anticipated to take place primarily within Alabama, Arkansas,
Kentucky and  Tennessee.  Investors  are  anticipated  to be  residents  only of
Alabama, Arkansas, Kentucky and Tennessee.

     Each Investor should consult his own attorney or tax advisor  regarding the
effect of state taxes on his personal situation.


                      SUMMARY OF THE PARTNERSHIP AGREEMENT

     The  Partnership  Agreement  sets  forth the  powers  and  purposes  of the
Partnership and the respective rights and obligations of the General Partner and
the Limited Partners.  The following is only a summary of certain  provisions of
the Partnership  Agreement,  and does not purport to be a complete  statement of
the various rights and  obligations  set forth  therein.  A complete copy of the
form of the form of the Partnership Agreement is set forth as Appendix B to this
Memorandum,  and  Investors are urged to read the  Partnership  Agreement in its
entirety and to review it with their counsel and advisors.


                                      -86-
<PAGE>

Formation

     The  Partnership  was formed on October 16,  1998 as a limited  partnership
under the laws of the State of Tennessee and has had no operations to date.  The
Initial Limited Partner will withdraw from the Partnership upon the Closing. The
General Partner of the Partnership is Prime Lithotripter Operations, Inc., a New
York corporation, d/b/a Tennessee Valley Lithotripter. See "General Partner."

Description of the Units

     Investors  will acquire their  interests in the  Partnership in the form of
Units.  Upon the  successful  completion of the Offering,  each purchaser of the
Units  whose  subscription  is accepted  by the  General  Partner  will become a
Limited Partner in the Partnership. For each Unit purchased, a payment of $9,114
is required;  provided, that prospective Investors who meet certain requirements
may be able to fund a portion of their Unit purchase  price with the proceeds of
a Limited Partner Loan. See "Terms of the Offering - Limited Partner Loans." The
per Unit cash purchase  price and  execution and delivery of any Loan  Documents
are due upon  subscription.  No Limited  Partner will have any liability for the
debts and obligations of the  Partnership by reason of being a Limited  Partner,
except to the extent of (i) his Capital  Contribution,  (ii)  his  proportionate
share of the  undistributed  profits of the Partnership and (iii) the  amount of
certain  Distributions  received  from the  Partnership  as provided by the Act.
Limited  Partners  financing a portion of the purchase price of their Units will
also be liable to the Bank as provided in the Loan Documents.  See "Risk Factors
- - - Other  Investment  Risks - Liability  Under Limited  Partner  Loans" and "Risk
Factors  - Other  Investment  Risks -  Limited  Partners'  Obligation  to Return
Certain  Distributions."  See  also  Form of Legal  Opinion  of  Womble  Carlyle
Sandridge & Rice, a Professional  Limited Liability Company,  attached hereto as
Appendix E.

Contribution of the General Partner

     Concurrent  with the  Closing of the  Offering,  the General  Partner  will
contribute to the Partnership the Contributed Assets. See "Proposed Activities -
Contribution of Assets." In exchange,  the General Partner will receive at least
an initial 80% Partnership Interest.  The General Partner's Partnership Interest
will increase by 0.25% for each unsold Unit.

Dilution Offerings

     The  General  Partner  has the  authority  to  periodically  offer and sell
additional  limited  partnership  interests  in  the  Partnership  (a  "Dilution
Offering")  to  local  investors  who  are  not  investors  in  the  Partnership
("Qualified  Investors").  The primary purpose of Dilution Offerings is expected
to be to raise additional capital for any legitimate  Partnership purpose. Money
raised in a Dilution  Offering  could also be  distributed  to the  Partners  as
determined by the General Partner. Any sale of limited partnership  interests in
a Dilution  Offering will result in  proportionate  dilution of the  Partnership
Percentage  Interests  of the  existing  Partners;  i.e.,  the  interests of the
General  Partner and of the Limited  Partners in Partnership  allocations,  cash
distributions and voting rights


                                      -87-
<PAGE>

will be proportionately  reduced as a result of a successful  Dilution Offering.
Unless otherwise agreed by the General Partner and a Majority in Interest of the
Limited  Partners at the time,  any  additional  limited  partnership  interests
offered  in a  Dilution  Offering  will be sold for a price  no  lower  than the
highest  price for which  proportionate  limited  partnership  interests  in the
Partnership have been previously sold by the Partnership.

Fundamental Changes

     Under the terms of the Partnership Agreement, the General Partner may cause
the  Partnership  to engage in certain  transactions  in the future  without any
approval by the Limited Partners,  any of which transactions could result in the
termination or reorganization of the Partnership and a partial or total dilution
of all Limited Partners' interests in the Partnership. The General Partner could
adopt a plan providing for the merger or  consolidation  of the Partnership with
another entity; the sale of all or substantially all of the Partnership's assets
to another entity; or any other reorganization,  reclassification or exchange of
the  Partnership  Interests,   including  without  limitation  the  exchange  of
Partnership  Interests  for equity  interests  in another  entity or for cash or
other  consideration.  In such event,  the Limited Partners are obligated by the
terms of the Partnership  Agreement to take or refrain from taking,  as the case
may be, such actions as the plan may  provide,  including,  without  limitation,
executing  such  instruments,  and  providing  such  information  as the General
Partner may reasonably request. Any such plan may also result in an amendment to
the  Partnership  Agreement  or the adoption of a new  partnership  agreement in
connection with the merger of the Partnership with another entity.  The plan may
also provide that the General  Partner and its affiliates  will receive fees for
services  rendered in connection  with the operation of the  Partnership  or any
successor entity following the consummation of the transactions described in the
plan, and neither the Partnership  nor the Limited  Partners will have any right
by virtue of the Partnership Agreement in the fees to be derived therefrom.  Any
securities or other  consideration to be distributed to the Partners pursuant to
any such plan shall be  distributed  in the manner set forth in the  Partnership
Agreement as though the Partnership were being liquidated. Moreover, because the
General Partner has the sole right to approve the transactions  described above,
the  General  Partner may be entitled  to  complete  such  transactions  without
providing the Limited  Partners  information that might otherwise be required to
be  disclosed  to the Limited  Partners  prior to  completing  the  transaction,
including but not limited to information  concerning the risks and effect of the
proposed   transaction;   the  fairness  of  the  proposed  transaction  to  the
Partnership and the Limited Partners;  comparative  distributions to the General
Partner under the Partnership operations and under the proposed  reorganization;
the method of valuing the Partnership in the proposed transaction and the method
of allocating value among various participants in the proposed transaction;  the
background,  reasons for and alternatives to the  transaction;  and conflicts of
interest of the General Partner in the proposed reorganization.

     In December 1993,  Congress  passed  legislation  amending  portions of the
Securities Exchange Act of 1934 to afford new protections to limited partnership
investors   in  the  context  of  certain   limited   partnership   mergers  and
reorganizations  commonly  known as partnership  rollups.  The law, known as the
"Limited  Partnership  Rollup  Reform Act of 1993" (the  "Reform  Act"),  became
effective  on December  17,  1994,  and applies to certain  rollup  transactions
proposed after


                                      -88-
<PAGE>

such date.  The Reform Act and the Rules  promulgated  thereunder are applicable
only to certain  types of  partnership  rollups and,  when  applicable,  provide
limited partners with the following protections:

     (i) allows and facilitates  communication  between limited  partners during
their consideration of a proposed rollup;

     (ii)  allows the  limited  partners  to obtain a list of the other  limited
partners involved in the rollup;

     (iii) prohibits the practice of compensating persons soliciting the limited
partners' approval of the rollup based on the number of approvals received;

     (iv) requires  greater  disclosure to the limited  partners of the terms of
the rollup and its effects on the limited partners  including (a) the reason for
the rollup and consideration of the  alternatives;  (b) the method of allocating
interests in the  successor  entity to the limited  partners and why such method
was chosen;  (c) comparative  information  including  changes in limited partner
voting rights,  changes in  distributions to the limited partners and changes in
compensation  to the general  partner;  (d) conflicts of interest of the general
partner;  (e) changes in the  partnership's  business plan; (f) the valuation of
the limited partnership  interests;  (g) any significant  difference between the
exchange  values  of the  limited  partnerships  and the  trading  price  of the
securities to be issued in the rollup transaction;  (h) the risks and effects of
the proposed rollup  transaction;  (i) a statement by the general partner of the
fairness of the rollup and the general  partner's  basis for such  opinion;  (j)
full  disclosure  of any opinion  (other than  opinions of counsel) or appraisal
received by the general  partner related to the proposed  transaction,  or if no
such opinion or appraisal was sought by the general  partner,  an explanation of
why no such opinion or appraisal is necessary to permit the limited  partners to
make an informed decision regarding the proposed transaction;  (k) the rights of
the limited  partners to exercise  dissenters'  or  appraisal  rights or similar
rights;  (l) the method  for  allocating  rollup  consideration  to the  limited
partners and an explanation why such method was chosen; and (k) tax consequences
of the rollup; and

     (v)  requires a minimum 60 day  offering  period  during  which the limited
partners may consider the proposed rollup (or such shorter period as required by
state law).

     Further,  the Reform Act also  provides that related Rules of Fair Practice
will be amended to prohibit exchanges and national securities  associations from
listing  securities  issued  in  connection  with a rollup  unless  the  limited
partners are afforded the following protections:

     (i)  dissenting  limited  partners  must  have  the  right  to  one  of the
following:  (a) to  receive  an  appraisal  and  compensation;  (b) to  retain a
security under substantially similar terms as the original issue; (c) to approve
of the rollup by a vote of not less than 75% of the  outstanding  securities  of
each  participating  partnership,  or; (d) to use an  independent  committee  to
negotiate the terms of the transaction.


                                      -89-
<PAGE>

     (ii) not to have their voting power unfairly reduced or abridged.

     (iii)  not to  bear  an  unfair  proportion  of  the  costs  of the  rollup
transaction.

     The Reform Act applies only to certain  types of rollup  transactions,  and
there is no certainty  that any plan  considered by the  Partnership at any time
would be subject to the Reform  Act.  Thus  Investors  must  assume in making an
investment in the Units that their Limited Partnership  Interest will be subject
to the provisions of the Partnership  Agreement  permitting  fundamental changes
which could result in the termination or reorganization of the Partnership and a
partial or total dilution of all Limited Partners'  interests in the Partnership
without the consent of, or disclosure  of detailed  information  concerning  the
transaction to, the Limited Partners.

Profits, Losses and Distributions

     The  following  is a  summary  of  certain  provisions  of the  Partnership
Agreement  relating to the allocation and  distribution of the Profits,  Losses,
Partnership  Cash Flow,  Partnership  Refinancing  Proceeds,  Partnership  Sales
Proceeds,  and cash upon dissolution of the  Partnership.  Investors should note
that the Percentage Interests referenced in the discussion below could change as
a consequence of a future Dilution  Offering.  Because an  understanding  of the
defined  financial  terms  is  essential  to an  evaluation  of the  information
presented below,  Investors are urged to review carefully the definitions of the
terms appearing in the Glossary.

     1. Allocations.

     Losses. After giving effect to the special allocations set forth below, the
Partnership's  Losses,  if any, for each Year generally will be allocated to the
Partners in accordance with their respective Percentage Interests.

     Profits.  After giving effect to the special  allocations  set forth below,
the  Partnership's  Profits  for any Year  generally  will be  allocated  to the
Partners in accordance with their respective Percentage Interests.

     All items of income,  gain,  loss,  deduction,  or credit will be allocated
among the Partners  proportionately.  Further,  notwithstanding  the  foregoing,
after giving effect to certain special allocations,  the General Partner must be
allocated at least 1% of all items of income, gain, loss, deduction or credit.

     2. Special Allocations.  The following special allocations shall be made in
the following order:

     (i)  Partnership  Minimum  Gain  Chargeback.  If there is a net decrease in
Partnership  Minimum  Gain  during any Year,  each  Partner  shall be  specially
allocated items of Partnership income and gain for such Year (and, if necessary,
subsequent Years) in an amount equal to such Partner's share of the net decrease
in Partnership Minimum Gain, determined in accordance


                                      -90-
<PAGE>

with Treasury  Regulations Section  1.704-2(g)(2).  Allocations made pursuant to
the previous  sentence  will be made in  proportion  to the  respective  amounts
required  to be  allocated  to each  Partner  pursuant  to that  section  of the
Regulations.  This provision relating to Partnership Minimum Gain Chargebacks is
intended to comply with  Treasury  Regulations  Section  1.704-2(f)  and will be
interpreted and applied in a manner consistent with that Regulation.

     (ii) Partner Minimum Gain Chargeback. If there is a net decrease in Partner
Minimum Gain  attributable to a Partner  Nonrecourse  Debt during any Year, each
Partner who has a share of the Partner Minimum Gain attributable to such Partner
Nonrecourse  Debt shall be specially  allocated items of Partnership  income and
gain for such Year (and, if necessary,  subsequent  Years) in an amount equal to
such Partner's share of the net decrease in Partner Minimum Gain attributable to
such  Partner  Nonrecourse  Debt,  to the  extent  required  and  determined  in
accordance with Treasury Regulations Section 1.704-2(i)(4). Allocations pursuant
to the previous  sentence will be made in proportion to the  respective  amounts
required  to be  allocated  to each  Partner  pursuant  to that  section  of the
Regulations.  This  provision  relating to Partner  Minimum Gain  Chargebacks is
intended to comply with Regulation Section 1.704-2(i)(4) and will be interpreted
and applied in a manner consistent with that Regulation.

     (iii)  Qualified  Income  Offset.  If a Partner  unexpectedly  receives any
adjustments,  allocations  or  distributions  described in Treasury  Regulations
Sections 1.704-1(b)(2)(ii)(d)(4) through (6) which causes or increases a deficit
balance in such  Partner's  Capital  Account (as  adjusted  pursuant to Treasury
Regulations Section 1.704-1(b)(2)(ii)(d)),  items of Partnership income and gain
will be  specially  allocated  to each  such  Partner  in an amount  and  manner
sufficient to eliminate, to the extent required by the Regulations,  the deficit
Capital  Account  of such  Partner  as quickly  as  possible,  provided  that an
allocation  pursuant to this  provision  shall be made only if and to the extent
that  such  Partner  would  have a  deficit  Capital  Account  after  all  other
allocations  have been  tentatively  made as if this  provision  were not in the
Partnership  Agreement.  This  provision is intended to be a  "qualified  income
offset," as defined in Regulation Section 1.704-1(b)(2)(ii)(d).

     3.  Allocations  Between  Transferor  and  Transferee.  In the event of the
transfer  of all or any part of a Partner's  interest  (in  accordance  with the
provisions of the  Partnership  Agreement) in the  Partnership at any time other
than at the end of a year, or the admission of a new Partner (in accordance with
the provisions of the Partnership Agreement),  the transferring or new Partner's
share of the  Partnership's  income,  gain,  loss,  deductions  and credits,  as
computed both for accounting purposes and for federal income tax purposes,  will
be  allocated  between the  transferor  Partner and the  transferee  Partner (or
Partners), or the new Partner and the other Partners, as the case may be, in the
same ratio as the  number of days in such year  before and after the date of the
transfer or admission; provided, however, that if there has been a sale or other
disposition of the assets of the  Partnership  (or any part thereof) during such
year,  then upon the mutual  agreement  of all the Partners  (excluding  the new
Partner  and  the  transferring  Partner),  the  Partnership  may  in  its  sole
discretion  treat the  periods  before  and after  the date of the  transfer  or
admission as separate years and allocate the Partnership's net income, gain, net
loss,   deductions  and  credits  for  each  of  such  deemed   separate  years.
Notwithstanding the foregoing,  the Partnership's  "allocable cash basis items,"
as that term is used in Section  706(d)(2)(B) of the Code, shall be allocated as
required by Section 706(d)(2) of


                                      -91-
<PAGE>

the Code and the  Regulations  thereunder.  See "Tax  Aspects of the  Offering -
Partnership Allocations."

     4.  Incoming  Partner  Allocations.  The  Code  prohibits  the  retroactive
allocation of a full share of partnership items to persons who were partners for
less than the entire year. As provided above, the Partnership Agreement provides
that items of income,  gain,  loss,  deductions  and credits  will be  allocated
between a transferor  Partner and a transferee  Partner in the same ratio as the
number  of days in the  year  before  and  after  the  date of the  transfer  or
admission,  unless the Partnership has sold any of its assets in the year of the
transfer or admission. If the Partnership has sold any of its assets in the year
of the transfer or admission,  then the General  Partner may elect,  in its sole
discretion,  to use the interim closing of the books method described above. See
"Tax Aspects of the Offering - Partnership Allocations."

     5. Distributions.

     The Limited Partnership Agreement authorizes the following Distributions to
be made to the Partners:

     Distribution  of  Partnership  Cash  Flow.  Partnership  Cash  Flow will be
distributed  to the  Partners  within 60 days  after the end of each year of the
Partnership,  or earlier in the discretion of the General Partner, in accordance
with their  respective  Percentage  Interests.  Subject to the  availability  of
Partnership Cash Flow and the financial  obligations of the  Partnership,  it is
anticipated that quarterly distributions will be made to the Partners.  There is
no assurance, however, that such will be the case.

     Distribution  of  Partnership  Sales Proceeds and  Partnership  Refinancing
Proceeds.  Partnership Sales Proceeds and Partnership  Refinancing Proceeds will
be distributed to the Partners within 60 days after the transactions giving rise
to such  proceeds,  or earlier in the  discretion  of the  General  Partner,  in
accordance with their respective Percentage Interests.

     Distribution Upon Dissolution.  Upon the dissolution and termination of the
Partnership,  the General Partner,  or if there is none, a representative of the
Limited Partners,  will cause the cancellation of the Partnership's  Certificate
of Limited Partnership,  liquidate the assets of the Partnership,  and apply and
distribute the proceeds of such liquidation in the following order of priority:

     (i) First, to the payment of debts and liabilities of the Partnership,  and
the expenses of liquidation;

     (ii) Second,  to the creation of any reserves  that the General  Partner or
the  representatives  of the Limited Partners may deem reasonably  necessary for
the payment of any  contingent or unforeseen  liabilities  or obligations of the
Partnership or of the General  Partner  arising out of or in connection with the
business and operation of the Partnership; and



                                      -92-
<PAGE>

     (iii) Third,  the balance,  if any, will be  distributed to the Partners in
accordance  with the Partners'  positive  Capital  Account  balances  after such
Capital Accounts are adjusted as provided in the Partnership Agreement,  and any
other adjustments  required by the final Regulations under Section 704(b) of the
Code. Any general partner with a negative Capital Account following distribution
of  the  liquidation  proceeds  or  the  liquidation  of  its  interest  in  the
Partnership  must contribute to the Partnership an amount equal to such negative
capital account on or before the later of the end of the  Partnership's  taxable
year or within 90 days after the date of liquidation. Any capital so contributed
will be (i) distributed to those Partners with positive  capital  accounts until
such  capital  accounts  are  reduced  to zero,  and/or  (ii) used to  discharge
recourse  liabilities.  It is  intended  that  Capital  Accounts  will allow for
liquidation  distributions consistent with the manner in which Partnership Sales
Proceeds and Partnership  Refinancing Proceeds are distributed;  however,  there
can be no assurance that such will be the case.

     Tax  Withholding.  The  Partnership  is authorized to pay, on behalf of any
Partner, any amounts to any federal, state or local taxing authority,  as may be
necessary for the Partnership to comply with tax  withholding  provisions of the
Code or the income tax or revenue  laws of any taxing  authority.  To the extent
the  Partnership  pays any such amounts that it may be required to pay on behalf
of a  Partner,  such  amounts  will be treated  as a cash  Distribution  to such
Partner and will reduce the amount otherwise distributable to him.

Management of the Partnership

     The  General  Partner  has the sole  right to manage  the  business  of the
Partnership and at all times is required to exercise its  responsibilities  in a
fiduciary capacity. The consents of the Limited Partners is not required for any
sale or  refinancing  of the Mobile  Lithotripsy  Systems or the purchase of new
lithotripsy-related   equipment  by  the   Partnership.   Following   the  Asset
Contribution,  the Partnership will contract with the Management Agent to manage
and administer the day-to-day  operations of the Mobile Lithotripsy Systems. See
"Proposed  Activities  -  Management  and  Administration"  and  the  Management
Agreement, the form of which is attached as Appendix D.

     Under the  Partnership  Agreement,  if the General Partner is adjudged by a
court of  competent  jurisdiction  to be liable to the  Limited  Partners or the
Partnership for acts or omissions of gross  negligence or  constituting  willful
misconduct,  the General Partner may be removed and another substituted with the
consent of all of the Limited Partners.

Powers of the General Partner

     1. General.

     The General Partner may, in its absolute discretion, borrow money, acquire,
encumber,  hold title to, pledge,  sell, release or otherwise dispose of, all or
any part of the Partnership's  assets, when and upon such terms as it determines
to be in the best  interest of the Part  nership  and employ such  persons as it
deems necessary for the operation of the Partnership. The


                                      -93-
<PAGE>

General  Partner,  however,  is expressly  prohibited  from, among other things:
(i) possessing  Partnership assets or assigning the rights of the Partnership in
Partnership assets or the Mobile Lithotripsy  Systems for other than Partnership
purposes;  (ii) admitting Limited Partners except as provided in the Partnership
Agreement;  and  (iii) performing  any act (other  than an act  required  by the
Partnership  Agreement or any act taken in good faith  reliance  upon  Counsel's
opinion) which would, at the time such act occurred, subject any Limited Partner
to liability as a general partner in any jurisdiction.

     2. Tax Matters.

     (i) Elections.  The General Partner will, in its sole discretion,  make for
the Partnership any and all elections for federal,  state and local tax purposes
including,  without limitation, any election, if permitted by applicable law, to
adjust the basis of the  Partnership's  property  pursuant to Code Sections 754,
734(b) and 743(b), or comparable provisions of state or local law, in connection
with transfers of interests in the Partnership and Partnership Distributions.

     (ii) Tax Matters Partner. The Partnership  Agreement designates the General
Partner as the Tax Matters  Partner (as defined in Section 6231 of the Code) and
authorizes  it to act in any similar  capacity  under state or local law. As the
Tax Matters  Partner,  the General  Partner is authorized (at the  Partnership's
expense):   (i)  to  represent  the   Partnership  and  Partners  before  taxing
authorities  or courts of competent  jurisdiction  in tax matters  affecting the
Partnership  or  Partners  in their  capacity  as  Partners;  (ii) to extend the
statute of limitations for assessment of tax deficiencies  against Partners with
respect to adjustments to the Partnership's federal, state or local tax returns;
(iii) to execute any agreements or other documents relating to or affecting such
tax matters, including agreements or other documents that bind the Partners with
respect to such tax matters or  otherwise  affect the rights of the  Partnership
and Partners; and (iv) to expend Partnership funds for professional services and
costs associated therewith.  In its capacity as Tax Matters Partner, the General
Partner shall oversee the  Partnership  tax affairs in the manner which,  in its
best  judgment,  are in the  interests of the  Partners.  Moreover,  the General
Partner will, in its sole discretion,  not make an election pursuant to Treasury
Regulation 301.7701.3 to be treated as an association taxable as a corporation.

Rights and Liabilities of the Limited Partners

     The Limited Partners do not have any right to participate in the management
of the business of the  Partnership.  Limited  Partners are not required to make
any capital contributions to the Partnership except amounts agreed by them to be
paid, or pay or be personally  liable for, any expense,  liability or obligation
of the Partnership,  except (i) to the extent of their  respective  interests in
the Partnership, (ii) for the obligation to return certain Distributions made to
them as  provided  by the Act,  and  (iii) to the  extent  of their  liabilities
pursuant to their respective Limited Partner Loan Obligations. See "Risk Factors
- - - Other  Investment  Risks - Limited  Partners'  Obligations  to Return  Certain
Distributions" and "Liability Under Limited Partner Loans."



                                      -94-
<PAGE>

Restrictions on Transfer of Partnership Interests

     No Partnership  Interest nor any Units may be transferred without the prior
written consent of the General Partner,  which approval may be granted or denied
in the sole discretion of the General  Partner,  and subject to the satisfaction
of  certain  other  conditions  set forth in the  Partner  ship  Agreement.  The
Partnership  Agreement contains  additional  limitations on transfer,  including
provisions  prohibiting  transfer that would violate federal or state securities
laws. No transferee of the Units will  automatically  become a Limited  Partner.
Admission  of  a  transferee  requires  the  fulfillment  of  other  obligations
enumerated  in the  Partnership  Agreement,  including  either the approval of a
Majority  in  Interest of the Limited  Partners  (except  the  assignor  Limited
Partner)  and the  General  Partner,  or the  approval of the  assignor  Limited
Partner and the General  Partner.  Any transferee of a Partnership  Interest who
has not been admitted to the  Partnership  as a Partner shall not be entitled to
any of the rights,  powers or privileges of his  transferor  except the right to
receive and be credited or debited with his  proportionate  share of Partnership
income,  gains,  profits,  losses,  deductions,   credits  or  distributions.  A
transferor  Limited  Partner  will  not be  released  from  his or her  personal
liability  under  any  Limited  Partner  Note  upon the  transfer  of his or her
Partnership  Interest,  unless otherwise  specifically agreed by the Bank at the
time of the transfer.  Unauthorized  transfers may  constitute a default under a
Limited  Partner Note.  See "Risk Factors - Other  Investment  Risks - Liability
Under Limited Partner Loan."

     The  General  Partner  may  transfer  all or a portion  of its  Partnership
Interest only with the consent of a Majority in Interest of the Limited Partners
before  the  transferee  can  be  admitted  as  a  Substitute  General  Partner.
Notwithstanding  the  foregoing,  the  Partnership  Agreement  gives the General
Partner the authority to transfer all or part of its General Partner interest to
any  transferee  controlled  by it or one or  more  of  its  Affiliates  without
obtaining the Limited Partners' consent. Any such transferee would automatically
be a substitute  general partner.  Both the admission of any new shareholder and
the withdrawal of any  shareholder  from the General Partner may be done without
the approval of the Limited Partners.

Dissolution and Liquidation

     The  Partnership  will  dissolve  and  terminate  for any of the  following
reasons:

     1. The sale,  exchange or  disposition of all or  substantially  all of the
property of the Partnership without making provision for the replacement thereof
(except to the extent otherwise  provided in a  reorganization  plan approved by
the General Partner as described above);

     2. The expiration of its term on December 31, 2048;

     3. The bankruptcy or occurrence of certain other events with respect to the
General Partner;

     4. The election to dissolve the Partnership made by the General Partner, in
its sole discretion, including pursuant to a reorganization plan approved by the
General Partner; or


                                      -95-
<PAGE>

     5. The election to dissolve the Partnership  made by the General Partner in
the event of certain legislation, case law or regulatory changes which adversely
affect the operation of the Partnership.

     The  retirement,  resignation,  bankruptcy,  assignment  for the benefit of
creditors,  dissolution,  death,  disability  or legal  incapacity  of a general
partner will not result in a  termination  of the  Partnership  if the remaining
general partner or general  partners,  if any, elect to continue the business of
the  Partnership,  or if no general  partner  remains,  if within 90 days of the
occurrence of one of such events, a Majority in Interest of the Limited Partners
elect in writing to continue the Partnership and, if necessary,  designate a new
general partner.

     Upon   dissolution,   the  General   Partner  or,  if  there  is  none,   a
representative of the Limited Partners,  will liquidate the Partnership's assets
and distribute the proceeds  thereof in accordance with the priorities set forth
in  the  Partnership  Agreement.  See  "Profits,   Losses  and  Distributions  -
Distributions - Distribution upon Dissolution"  above and "Optional  Purchase of
Limited Partner Interests" below.

Optional Purchase of Limited Partner Interests

     As provided in the Partnership  Agreement,  the General Partner,  or if the
General  Partner  elects,  the  Partnership,  has the option to purchase all the
interest  of a Limited  Partner  in the  Partnership  upon the  occurrence  with
respect to the Limited Partner of (i) death, (ii) a domestic  proceeding,  (iii)
insolvency,  or (iv) direct or indirect  ownership of an interest in a competing
venture  (including  the lease or  sublease  of  competing  technology).  If the
General  Partner  and the  Partnership  decline  to  exercise  the  option,  the
withdrawing  Limited  Partner or his  representative,  as the case may be, shall
continue  to  hold  the  Partnership  Interest  pursuant  to  the  terms  of the
Partnership  Agreement.  If the General Partner (or the  Partnership)  elects to
exercise the option,  the option  purchase  price will be equal to the lesser of
the  Limited  Partner's  share  of the  Partnership's  book  value,  if any,  as
reflected  by  the  Limited   Partner's   capital  account  in  the  Partnership
(unadjusted  for any  appreciation  in  Partnership  assets  and as  reduced  by
depreciation deductions claimed by the Partnership for tax purposes) or the fair
market value of such interests. The book value is likely to be considerably less
than the fair market value of the Limited Partner's  interest in the Partnership
and may not provide any  positive  return on the Limited  Partner's  investment.
Because Partnership  losses,  depreciation  deductions and Distributions  reduce
capital  accounts,  and  because  appreciation  in  Partnership  assets  is  not
reflected in capital accounts, it is the opinion of the General Partner that the
option purchase price will be nominal in amount.

     In  addition,  if state or  federal  regulations  or laws  are  enacted  or
applied,  or if any other legal developments occur, which, in the opinion of the
General  Partner,   adversely  affect  (or  potentially  adversely  affect)  the
operation of the  Partnership  or the  business of the  Partnership  (e.g.,  any
prohibition on physician ownership), the General Partner, in its sole discretion
is required either to (i) purchase the Partnership  Interests of all the Limited
Partners  at a price  equal to the  lesser of (y) the fair  market  value of the
Partnership  Interests,   or  (z)  the  book  value  price  set  out  above,  or
(ii) dissolve and liquidate the Partnership. See "Regulation."


                                      -96-
<PAGE>

Noncompetition Agreement and Protection of Confidential Information

     The  Partnership  Agreement  provides  that each  Partner  (other  than the
General  Partner  and its  Affiliates)  is  prohibited  from  having a direct or
indirect  ownership  interest in a  competing  venture  (including  the lease or
sublease of competing  technology)  (the "Outside  Activities").  While they own
Partnership  Interests,  each Partner is precluded  from engaging in any Outside
Activities.  In the event that a Partner's Partnership Interest is terminated or
transferred upon the occurrence of certain events as provided in the Partnership
Agreement,  such Partner is precluded,  for a period of two (2) years  following
the date of such  withdrawal,  from engaging in any Outside  Activity within any
market area in which the  Partnership  is  providing  services  or has  provided
services within the twelve months preceding the withdrawal.  This prohibition is
in  addition to the right of the  General  Partner to acquire the  interest of a
Partner engaged in an Outside Activity as provided in the Partnership Agreement.
See "Optional  Purchase of Limited Partner  Interests" in this Section,  and the
form of the Partnership Agreement attached hereto as Appendix B.

     In  addition,   the  Partnership   Agreement  provides  that  each  Partner
acknowledges  and agrees that such Partner's  participation  in the  Partnership
necessarily involves his access to confidential  information that is proprietary
in  nature  and,   therefore,   the  exclusive   property  of  the  Partnership.
Accordingly,  the Partners  (other than the General  Partner and its Affiliates)
are  precluded  from  disclosing  such  confidential  information  during  their
participation as Partners or thereafter unless required by law or with the prior
written consent of the Partners.

Arbitration

     The Partnership  Agreement  provides that disputes arising thereunder shall
be resolved by submission to  arbitration  in accordance  with the provisions of
Tennessee law.

Power of Attorney

     Each  Investor,  by  executing  the  Subscription  Agreement,   irrevocably
appoints Joseph Jenkins,  M.D. and Thomas Driber,  Ph.D.,  severally,  to act as
attorneys-in-fact to execute the Partner ship Agreement,  any amendments thereto
and any certificate of limited  partnership  filed by the General  Partner.  The
Partnership  Agreement,  in turn,  contains  provisions  by which  each  Limited
Partner  irrevocably  appoints  Joseph Jenkins,  M.D. and Thomas Driber,  Ph.D.,
severally,  to act as his attorneys-in-fact to make, execute,  swear to and file
any document  necessary to the conduct of the  Partnership's  business,  such as
deeds of conveyance of real or personal property as well as any amendment to the
Partnership  Agreement  or to  any  certificate  of  limited  partnership  which
accurately reflects actions properly taken by the Partners.

Reports to Limited Partners

     Within 90 days after the end of each Year of the  Partnership,  the General
Partner  will send to each  person who was a Limited  Partner at any time during
such year such tax  information,  including,  without  limitation,  Federal  Tax
Schedule K-1, as will be reasonably necessary for the


                                      -97-
<PAGE>

preparation  by such  person of his federal  income tax  return,  and such other
financial information as may be required by the Act.

Records

     Proper  and  complete  records  and  books of  account  will be kept by the
General  Partner in which will be entered fully and accurately all  transactions
and other matters relative to the Partnership's business as are usually entered
into records,  books and accounts maintained by persons engaged in businesses of
a like character.  Pursuant to applicable law, the Partnership books and records
will be kept on the accrual method basis of accounting. The Partnership's fiscal
year will be the  calendar  year.  The books and records  will be located at the
Partnership's  office,  and  will  be  open  to the  reasonable  inspection  and
examination  of the Limited  Partners or their duly  authorized  representatives
during normal business hours as provided by the Act.


                                  LEGAL MATTERS

     Certain legal matters in connection  with the Units offered  hereby will be
passed  upon  for the  Partnerships  by  Womble  Carlyle  Sandridge  &  Rice,  a
Professional  Limited Liability Company, of Winston-Salem,  North Carolina.  See
"Conflicts of Interest." On the Closing Date, Womble Carlyle Sandridge & Rice, a
Professional  Limited  Liability  Company,  will render an opinion,  the form of
which is attached as  Appendix E  to this  Memorandum,  with  respect to certain
federal income tax  consequences of an investment in Units.  See "Tax Aspects of
the Offering."


                             ADDITIONAL INFORMATION

     The Partnership will make available to you the opportunity to ask questions
of its  management  and to obtain  information  to the extent it possesses  such
information or can acquire it without an unreasonable  effort or expense,  which
is necessary to verify the accuracy of the information contained herein or which
you or your  professional  advisors desire in evaluating the merits and risks of
an investment in the Partnership.  Copies of certain Hospital Contracts may not,
however, be available due to confidentiality restrictions contained therein.


                                      -98-
                                                                         
 Name of Prospective Investor                               Memorandum Number











                FAYETTEVILLE LITHOTRIPTERS LIMITED PARTNERSHIP -
                                   ARKANSAS I

             A Limited Partnership Formed Under the Laws of Arkansas

                    CONFIDENTIAL PRIVATE PLACEMENT MEMORANDUM

                             up to $322,220 in Cash

                    20 Units of Limited Partnership Interest
                           at $16,111 in Cash per Unit





     THIS  MEMORANDUM  IS  FURNISHED  PURSUANT  TO A  CONFIDENTIALITY  AGREEMENT
BETWEEN  THE  PARTNERSHIP  AND  THE  INVESTOR  WHOSE  NAME  APPEARS  ABOVE.  THE
CONFIDENTIALITY  AGREEMENT PROHIBITS THE DISCLOSURE OF THE CONFIDENTIAL MATERIAL
CONTAINED  IN THIS  MEMORANDUM,  EXCEPT TO THE  EXTENT  SUCH  INVESTOR  DEEMS IT
NECESSARY  TO  SHARE  SUCH  INFORMATION  WITH  HIS  LEGAL,  ACCOUNTING  OR OTHER
FINANCIAL  ADVISORS,  WHO  LIKEWISE  SHALL BE BOUND BY THE SAME  CONFIDENTIALITY
RESTRICTIONS SET FORTH IN THE CONFIDENTIALITY AGREEMENT.






                            Medtech Investments, Inc.
                              Exclusive Sales Agent
                                2008 Litho Place
                       Fayetteville, North Carolina 28304
                                 1-800-682-7971

<PAGE>

                The Date of this Memorandum is November 18, 1998

           FAYETTEVILLE LITHOTRIPTERS LIMITED PARTNERSHIP - ARKANSAS I

                             up to $322,220 in Cash

                 up to 20 Units of Limited Partnership Interest
                           at $16,111 in Cash per Unit

Fayetteville Lithotripters Limited Partnership - Arkansas I, an Arkansas limited
partnership (the "Partnership") operated by its General Partner,  Lithotripters,
Inc., a North Carolina corporation (the "General Partner"), hereby offers on the
terms set forth  herein up to 20 Units  (the  "Units")  of  limited  partnership
interest in the Partnership,  at a price per Unit of $16,111 in cash. See "Terms
of the Offering."  Each Unit will  represent an initial 1% economic  interest in
the  Partnership.  See "Risk  Factors - Other  Investment  Risks -  Dilution  of
Limited  Partners'  Interest." The Partnership owns and operates two LithostarTM
second generation extracorporeal shock-wave lithotripters for the lithotripsy of
kidney stones.  Each LithostarTM is installed in its own self-propelled  Calumet
Coach (collectively, the Coaches with the installed LithostarsTM are referred to
herein as the "Mobile Lithotripsy  Systems") enabling the Partnership to provide
lithotripsy services at various locations throughout Arkansas.

The  Partnership  intends to use the  proceeds  of this  Offering  primarily  to
finance  the cost of  reconditioning  the  Coaches  and  renting  loaner  Mobile
Lithotripsy  Systems from the General Partner or its Affiliates  during the time
the Partnership's Mobile Lithotripsy Systems are being  reconditioned.  See "Use
of  Proceeds."  The  cash  purchase  price  is  due  at  subscription;  however,
prospective  Investors who meet certain  requirements may be able fund a portion
of their Unit purchase price with the proceeds of certain third-party financing.
See "Terms of the Offering - Limited Partner Loans." The Offering will terminate
on  December  30,  1998 (or  earlier  upon the sale of all 20 Units as  provided
herein),  unless  extended at the discretion of the General Partner for a period
not to exceed 180 days. ______________________________

Purchase of Units involves risks and is suitable only for persons of substantial
means who have no need for liquidity in this  investment.  Among other  factors,
prospective  investors  should note that (1) the Partnership  faces  substantial
competition  in the Service Area and (2) the health care  industry is undergoing
significant   government   regulatory  reforms.  See  "Risk  Factors"  and  "The
Offering - Suitability Standards."
 ______________________________


                                    Cash              Selling          Net Cash
                               Offering Price     Commissions(1)     Proceeds(2)
Per Unit(3)                       $ 16,111          $     250         $ 15,861
Total Maximum(4)                  $322,220          $   5,000         $317,220

(See Footnotes on Back of Cover Page)

    See Glossary for capitalized terms used herein and not otherwise defined.


                                                                 i
<PAGE>

                                                     ___________________________

     (1) The Units will be sold on a "best-efforts"  any or all basis by MedTech
Investments,  Inc., a broker-dealer  registered with the Securities and Exchange
Commission, a member of the National Association of Securities Dealers, Inc. and
an Affiliate of the General  Partner (the "Sales Agent").  The Partnership  will
pay the Sales Agent a $250  commission for each Unit sold and will reimburse the
Sales Agent for its Offering costs (not to exceed  $7,500).  The Partnership has
agreed to  indemnify  the Sales Agent  against  certain  liabilities,  including
liabilities  under the Securities Act of 1933 (the "Securities  Act"). See "Plan
of Distribution."

     (2) Net Cash Proceeds do not reflect  deduction of expenses  payable by the
Partnership.  See "Use of Proceeds."  The price per Unit ($16,111) is payable in
cash upon Subscription;  provided,  that prospective  Investors who meet certain
requirements may be able to fund a portion of their Unit purchase price with the
proceeds of certain  third-party  financing.  The  Partnership  has arranged for
financing of a portion of the Units'  purchase price with First- Citizens Bank &
Trust Company, Fayetteville,  North Carolina (the "Bank"). Therefore, in lieu of
paying the entire purchase price in cash at subscription,  prospective Investors
may  execute and deliver to the Sales  Agent  together  with their  subscription
packets,  at least $2,500 cash and a Limited Partner Note payable to the Bank in
a maximum principal amount of up to $13,611 per Unit to be purchased, a Loan and
Security Agreement, Security Agreement and two Uniform Commercial Code Financing
Statements ("UCC-1s")  (collectively,  the "Loan Documents").  See "Terms of the
Offering - Limited Partner Loans" and the forms of the Limited Partner Note, the
Loan  and  Security  Agreement  and  Security  Agreement  attached  to the  Bank
Commitment  as Exhibits A, B and C,  respectively,  which is attached  hereto as
Appendix C and the UCC's attached as part of the Subscription Packet.

     (3) Each Investor may purchase no less than one Unit. The General  Partner,
however,  reserves the right to sell less than one Unit as a minimum  investment
on a  limited  basis,  and to  reject  in  whole  or in part  any  subscription.
Purchases of fractional Units will be in multiples of one-half Units.

     (4) Offering Proceeds will first be used by the Partnership to pay offering
costs and  expenses (up to $37,250)  and the  remainder of the proceeds  will be
used to finance the cost of reconditioning the Coaches and renting loaner Mobile
Lithotripsy  Systems from the General Partner or its Affiliates  during the time
the  Partnership's  Mobile  Lithotripsy  Systems  are out of service  due to the
reconditioning  of the Coaches.  See "Use of Proceeds." The Partnership seeks by
this  Offering to sell up to 20 Units for an aggregate of up to $322,220 in cash
($317,220 net of Sales Agent's  commissions).  All  subscription  funds and Loan
Documents will be held in an interest bearing escrow account with First-Citizens
Bank & Trust Company, with offices in Fayetteville and Raleigh,  North Carolina,
until the acceptance of the Investor's subscription, rejection of the Investor's
subscription or termination of the Offering.  The Partnership has set no minimum
number of Units to be sold in this Offering.  Accordingly,  upon the receipt and
acceptance of an Investor's subscription by the Partnership
                                                        ii

<PAGE>

     Partner  Loan.  Upon  admission  as  a  Limited  Partner,   the  Investor's
subscription  funds will be released to the  Partnership and the Loan Documents,
if any, will be released to the Bank. In the event a  subscription  is rejected,
all subscription funds (without interest), the Loan Documents, if any, and other
subscription  documents held in escrow will be promptly returned to the rejected
Investor.  The Offering will terminate on December 30, 1998, unless it is sooner
terminated by the General Partner,  or unless extended for an additional  period
not to exceed 180 days. See "The Offering - General." _______________________

          THE  UNITS  ARE  BEING  OFFERED  PURSUANT  TO AN  EXEMPTION  FROM  THE
          REGISTRATION  REQUIREMENTS  OF THE SECURITIES ACT OF 1933, AS AMENDED,
          PROVIDED  IN  SECTION 4(2)  THEREOF  AND  RULE  506  OF  REGULATION  D
          PROMULGATED THEREUNDER, AS AMENDED, AND AN EXEMPTION FROM REGISTRATION
          PROVIDED  IN  SECTION  23-42-509(c)  OF  THE  ARKANSAS  CODE  OF  1987
          ANNOTATED,   AS  AMENDED,   AND  RULE  509.01(B)  OF  THE  REGULATIONS
          PROMULGATED THEREUNDER,  AS AMENDED. A REGISTRATION STATEMENT RELATING
          TO THESE  SECURITIES  HAS NOT BEEN  FILED  WITH ANY  STATE  SECURITIES
          AGENCY OR WITH THE SECURITIES AND EXCHANGE COMMISSION.
                                                  ______________

          NEITHER  THE  SECURITIES   AND  EXCHANGE   COMMISSION  NOR  ANY  STATE
          REGULATORY BODY HAS PASSED UPON THE VALUE OF THE SECURITIES,  MADE ANY
          RECOMMENDATIONS  AS TO THEIR  PURCHASE,  APPROVED OR  DISAPPROVED  THE
          OFFERING,  OR PASSED UPON THE ADEQUACY OR ACCURACY OF THIS MEMORANDUM.
          ANY REPRESENTATION TO THE CONTRARY IS UNLAWFUL. ______________

          THESE  SECURITIES ARE SUBJECT TO RESTRICTIONS ON  TRANSFERABILITY  AND
          RESALE AND MAY NOT BE TRANSFERRED OR RESOLD EXCEPT AS PERMITTED  UNDER
          THE  SECURITIES  ACT OF 1933,  AS AMENDED,  AND THE  APPLICABLE  STATE
          SECURITIES LAWS, PURSUANT TO REGISTRATION OR EXEMPTION  THEREFROM.  NO
          PUBLIC OR OTHER MARKET EXISTS OR WILL DEVELOP FOR THE UNITS. UNITS ARE
          NOT  TRANSFERABLE  WITHOUT  THE  CONSENT OF THE  GENERAL  PARTNER  AND
          SATISFACTION OF CERTAIN OTHER CONDITIONS INCLUDING THE AVAILABILITY OF
          AN  EXEMPTION  UNDER  THE  SECURITIES  ACT OF 1933 AND  VARIOUS  STATE
          SECURITIES LAWS.  INVESTORS SHOULD PROCEED ONLY ON THE ASSUMPTION THAT
          THEY MAY HAVE TO BEAR


                                                        iii

<PAGE>

          THE  ECONOMIC  RISK OF AN  INVESTMENT  IN THE UNITS FOR AN  INDEFINITE
          PERIOD OF TIME. ______________

          IN MAKING AN  INVESTMENT  DECISION,  INVESTORS  MUST RELY ON THEIR OWN
          EXAMINATION  OF THE PERSON OR ENTITY  CREATING THE  SECURITIES AND THE
          TERMS OF THE OFFERING,  INCLUDING THE MERITS AND RISKS INVOLVED. THESE
          SECURITIES  HAVE  NOT  BEEN   RECOMMENDED  BY  ANY  FEDERAL  OR  STATE
          SECURITIES  COMMISSION  OR  REGULATORY  AUTHORITY.   FURTHERMORE,  THE
          FOREGOING  AUTHORITIES  HAVE NOT  CONFIRMED THE ACCURACY OR DETERMINED
          THE ADEQUACY OF THIS DOCUMENT. ANY REPRESENTATION TO THE CONTRARY IS A
          CRIMINAL OFFENSE. ______________

          PROSPECTIVE  INVESTORS  SHOULD  NOT  CONSTRUE  THE  CONTENTS  OF  THIS
          MEMORANDUM OR ANY PRIOR OR SUBSEQUENT COMMUNICATIONS,  WHETHER WRITTEN
          OR ORAL,  FROM THE  PARTNERSHIP,  ITS  GENERAL  PARTNER  OR ANY OF ITS
          AGENTS OR  REPRESENTATIVES  AS INVESTMENT,  TAX OR LEGAL ADVICE.  THIS
          MEMORANDUM  AND THE  APPENDICES  HERETO,  AS WELL AS THE NATURE OF THE
          INVESTMENT,  SHOULD BE  REVIEWED  BY EACH  PROSPECTIVE  INVESTOR,  HIS
          INVESTMENT,  TAX OR  OTHER  ADVISORS,  AND HIS  ACCOUNTANTS  OR  LEGAL
          COUNSEL.
                                                  ______________

          NO OFFERING  LITERATURE OR ADVERTISING IN WHATEVER FORM WILL OR MAY BE
          EMPLOYED  IN  THE  OFFERING  OF  UNITS,  EXCEPT  FOR  THIS  MEMORANDUM
          (INCLUDING   AMENDMENTS  AND   SUPPLEMENTS,   IF  ANY)  AND  DOCUMENTS
          SUMMARIZED  HEREIN. NO PERSON IS AUTHORIZED TO GIVE ANY INFORMATION OR
          TO MAKE ANY  REPRESENTATION NOT CONTAINED IN THIS MEMORANDUM OR IN THE
          APPENDICES  HERETO,  AND, IF GIVEN OR MADE, SUCH OTHER  INFORMATION OR
          REPRESENTATION MUST NOT BE RELIED UPON.
                                                  ______________

          THE GENERAL PARTNER WILL MAKE AVAILABLE, PRIOR TO THE CLOSING, TO EACH
          PROSPECTIVE INVESTOR OR HIS REPRESENTATIVES,  OR BOTH, THE OPPORTUNITY
          TO ASK QUESTIONS OF, AND RECEIVE  ANSWERS FROM, THE GENERAL PARTNER OR
          A PERSON ACTING ON ITS BEHALF  CONCERNING  THE TERMS AND CONDITIONS OF
          THIS  OFFERING,  THE  PARTNERSHIP,  THE  GENERAL  PARTNER OR ANY OTHER
          RELEVANT  MATTERS,  AND TO OBTAIN ANY ADDITIONAL  INFORMATION,  TO THE
          EXTENT THAT THE GENERAL  PARTNER  POSSESSES  SUCH  INFORMATION  OR CAN
          ACQUIRE IT WITHOUT UNREASONABLE EFFORT OR EXPENSE, NECESSARY TO VERIFY
          THE ACCURACY OF THE INFORMATION HEREIN SET FORTH, SUBJECT TO CERTAIN


                                                        iv

<PAGE>

          CONFIDENTIALITY RESTRICTIONS CONTAINED IN VARIOUS CONTRACTS WITH THIRD
          PARTIES. ______________

          THIS MEMORANDUM CONTAINS SUMMARIES, BELIEVED BY THE GENERAL PARTNER TO
          BE ACCURATE,  OF CERTAIN TERMS OF CERTAIN DOCUMENTS,  BUT REFERENCE IS
          HEREBY MADE TO THE ACTUAL  DOCUMENTS,  COPIES OF WHICH  ACCOMPANY THIS
          MEMORANDUM  OR ARE  AVAILABLE  FROM THE GENERAL  PARTNER UPON REQUEST,
          SUBJECT TO CERTAIN  CONFIDENTIALITY  RESTRICTIONS CONTAINED IN VARIOUS
          CONTRACTS  WITH THIRD  PARTIES.  ALL SUCH  SUMMARIES  ARE QUALIFIED IN
          THEIR ENTIRETY BY THIS REFERENCE.
                                                  ______________

          THIS  OFFER  CAN  BE  WITHDRAWN  AT ANY  TIME  BEFORE  CLOSING  AND IS
          SPECIFICALLY  MADE SUBJECT TO THE TERMS DESCRIBED IN THIS  MEMORANDUM.
          SUBJECT TO SPECIFIC  RESTRICTIONS  PROVIDED  FOR  HEREIN,  THE GENERAL
          PARTNER  RESERVES THE RIGHT TO REJECT ANY  SUBSCRIPTION IN WHOLE OR IN
          PART OR TO  ALLOT  TO ANY  INVESTOR  LESS  THAN  THE  NUMBER  OF UNITS
          SUBSCRIBED FOR BY SUCH INVESTOR. SEE "THE OFFERING."
                                                  ______________

          THIS  MEMORANDUM HAS BEEN PREPARED SOLELY FOR THE BENEFIT OF INVESTORS
          INTERESTED  IN  THE  PROPOSED  PRIVATE  PLACEMENT  OF  THE  UNITS  AND
          CONSTITUTES  AN OFFER  ONLY IF THE NAME OF AN  OFFEREE  APPEARS IN THE
          APPROPRIATE  SPACE PROVIDED ON THE COVER PAGE HEREOF.  DISTRIBUTION OF
          THIS  MEMORANDUM  TO ANY  PERSON  OTHER  THAN SUCH  OFFEREE  AND THOSE
          PERSONS  RETAINED TO ADVISE HIM WITH RESPECT THERETO IS  UNAUTHORIZED,
          AND ANY REPRODUCTION OF THIS  MEMORANDUM,  IN WHOLE OR IN PART, OR THE
          DIVULGENCE OF ANY OF ITS CONTENTS,  WITHOUT THE PRIOR WRITTEN  CONSENT
          OF THE GENERAL  PARTNER,  IS  PROHIBITED.  EACH OFFEREE,  BY ACCEPTING
          DELIVERY  OF THIS  MEMORANDUM,  AGREES TO  RETURN  IT AND ALL  RELATED
          APPENDICES  AND OTHER  DOCUMENTS  TO THE GENERAL  PARTNER,  2008 LITHO
          PLACE,  FAYETTEVILLE,  NORTH CAROLINA  28304,  IF THE OFFEREE DOES NOT
          INTEND TO  SUBSCRIBE  FOR THE  PURCHASE  OF THE UNITS,  THE  OFFEREE'S
          SUBSCRIPTION IS NOT ACCEPTED OR THE OFFER IS TERMINATED.
                                                  ______________

          NEITHER THE DELIVERY OF THIS  MEMORANDUM  NOR ANY SALES MADE HEREUNDER
          SHALL, UNDER ANY CIRCUMSTANCES, IMPLY THAT THERE HAS BEEN NO CHANGE IN
          THE AFFAIRS OF THE PARTIES  DESCRIBED HEREIN SINCE THE DATE HEREOF, OR
          THAT THE INFORMATION CONTAINED HEREIN IS

                                                         v
<PAGE>

         CORRECT  AS OF ANY  TIME  AFTER  THE  DATE  OF THIS  MEMORANDUM.  THIS
          MEMORANDUM  DOES NOT CONSTITUTE AN OFFER OR  SOLICITATION IN ANY STATE
          TO ANY PERSON TO WHOM SUCH OFFER OR  SOLICITATION  WOULD BE  UNLAWFUL.
          ______________

          THE BUSINESS OF THE PARTNERSHIP  INVOLVES  CONFLICTS OF INTEREST.  SEE
     "CONFLICTS OF INTEREST."
                                                  ______________
          AFFILIATES  OF THE  GENERAL  PARTNER  WILL  CONTINUE  TO RECEIVE  FEES
     WHETHER  OR  NOT  THE  PARTNERSHIP   EARNS  ANY  ADDITIONAL   INCOME.   SEE
     "COMPENSATION AND REIMBURSEMENT TO THE GENERAL PARTNER AND ITS AFFILIATES."
                                                   ____________

          THE GENERAL PARTNER  BELIEVES THIS OFFERING IS AN ECONOMIC  INVESTMENT
     OPPORTUNITY;  THUS,  INVESTORS SHOULD NOT PURCHASE UNITS IN ANTICIPATION OF
     TAX BENEFITS.
                                                  ______________




                                                        vi

<PAGE>

                             TABLE OF CONTENTS 

RISK FACTORS...................................................................1
         Operating Risks.......................................................1
         Tax Risks.............................................................7
         Other Investment Risks................................................8

THE PARTNERSHIP...............................................................11

TERMS OF THE OFFERING.........................................................12
         The Units and Subscription Price.....................................12
         Acceptance of Subscriptions..........................................12
         Limited Partner Loans ...............................................13
         Subscription Period; Closing.........................................14
         Offering Exemption...................................................14
         Suitability Standards................................................15
         How to Invest........................................................16
         Restrictions on Transfer of Units....................................17

PLAN OF DISTRIBUTION..........................................................18

BUSINESS ACTIVITIES...........................................................19
         General  ............................................................19
         Treatment Methods for Kidney Stone Disease...........................19
         The LithostarTM......................................................20
         The Calumet Coaches..................................................21
         Anticipated Partnership Expenditures.................................21
         Acquisition of Additional Assets.....................................21
         Hospital Contracts...................................................22
         Management...........................................................23
         Employees............................................................23

THE GENERAL PARTNER...........................................................24

COMPENSATION AND REIMBURSEMENT TO THE
         GENERAL PARTNER AND ITS AFFILIATES...................................25

CONFLICTS OF INTEREST.........................................................27

FIDUCIARY RESPONSIBILITY OF THE GENERAL PARTNER...............................28



                                                        vii

<PAGE>

                                                                            Page

COMPETITION...................................................................29
         Affiliated Competition...............................................29
         Other Competition....................................................29

REGULATION....................................................................31
         Federal Regulation...................................................31
         State Regulation.....................................................38

PRIOR ACTIVITIES..............................................................39

SOURCES AND APPLICATIONS OF FUNDS.............................................41

FINANCIAL CONDITION OF THE PARTNERSHIP........................................42

MANAGEMENT'S DISCUSSION AND
         ANALYSIS OF THE RESULTS OF OPERATIONS................................47
         Nine Months Ended September 30, 1998 and September 30, 1997..........47
         Year Ended December 31, 1997 and December 31, 1996...................47
         Year Ended December 31, 1996 and December 31, 1995...................47

SUMMARY OF THE PARTNERSHIP AGREEMENT..........................................48
         Nature of Limited Partnership Interest...............................48
         Profits, Losses and Distributions....................................48
         Management of the Partnership........................................50
         Powers of the General Partner........................................50
         Rights and Liabilities of the Limited Partners.......................51
         Restrictions on Transfer of Partnership Interests....................52
         Dissolution and Liquidation..........................................52
         Optional Purchase of Limited Partner Interests.......................53
         Dilution Offerings...................................................53
         Arbitration..........................................................54
         Power of Attorney....................................................54
         Reports to Limited Partners..........................................54
         Records  ............................................................54

LEGAL MATTERS.................................................................55

GLOSSARY .....................................................................55




                                                       viii
<PAGE>

Appendix A        AGREEMENT OF LIMITED PARTNERSHIP OF FAYETTEVILLE
                  LITHOTRIPTERS LIMITED PARTNERSHIP - ARKANSAS I

Appendix B        BANK COMMITMENT (WITH EXHIBITS)

Appendix C        FORM OF OPINION OF WOMBLE CARLYLE SANDRIDGE & RICE, PLLC

Appendix D        NOTES TO FINANCIAL STATEMENTS


                                                        ix

<PAGE>

                                                  RISK FACTORS

Prior to subscribing for Units,  Investors should carefully  examine this entire
Memorandum,   including  the  Appendices  hereto,  and  should  give  particular
consideration  to the general risks  attendant to  speculative  investments  and
investments in partnerships generally,  and to the other special operating,  tax
and other investment risks set forth below.

Operating Risks

General Risks of Operations. Although the General Partner and its personnel have
significant  experience  in  managing  lithotripsy   enterprises,   whether  the
Partnership  can continue to effectively  operate and expand its business cannot
be accurately  predicted.  The benefits of an investment in the Partnership also
depend on many  factors  over which the  Partnership  has no control,  including
competition,  technological innovations rendering the Mobile Lithotripsy Systems
less  competitive  or  obsolete,  and  other  matters.  The  Partnership  may be
adversely  affected by various  changing  local  factors  such as an increase in
local unemployment, a change in general economic conditions, changes in interest
rates and  availability  of  financing,  and other  matters  that may render the
operation of its Mobile  Lithotripsy  Systems  difficult or unattractive.  Other
factors  that may  adversely  affect the  operation  of its  Mobile  Lithotripsy
Systems are unforeseen increased operating expenses,  energy shortages and costs
attributable thereto, uninsured losses and the capabilities of the Partnership's
management personnel.

Uncertainties  Related  to  Changing  Healthcare  Environment.   The  healthcare
industry has experienced  substantial changes in recent years.  Although managed
care has yet to become a major factor in the delivery of  lithotripsy  services,
the General Partner anticipates that managed care programs, including capitation
plans,  may play an increasing role in the delivery of lithotripsy  services and
that  competition for these services may shift from individual  practitioners to
health  maintenance  organizations  and other  significant  providers of managed
care. No assurance can be given that the changing  healthcare  environment  will
not have a material adverse effect on the Partnership.

Lack  of  Diversification.  The  Partnership's  fundamental  purpose  will be to
continue to operate the Mobile Lithotripsy  Systems.  Because the Partnership is
dependent  on only  one  line of  business,  it will  have  greater  risks  from
unexpected   service   interruptions,    equipment   breakdowns,   technological
developments,  kidney stone treatment medical  breakthroughs,  economic problems
and similar matters than would be the case with a more diversified business.

Dependence on Insurance  Reimbursement.  The prices the Partnership  charges its
patients for the  lithotripsy of kidney stones is  significantly  dependent upon
the  amount  of  reimbursement  private  health  care  insurers  allow  for this
procedure.  Most of the  Partnership's  patients pay for services  directly from
private  payment  sources,  primarily  from  third-party  insurers  such as Blue
Cross/Blue Shield and other commercial insurers. Coverage and payment levels for
these private  payment  sources vary  depending  upon the  patient's  individual
insurance policy. While the Partnership does not rely on Medicare  reimbursement
for a substantial portion of its revenues,

                                                         1
<PAGE>

the Medicare  program has  historically  influenced the setting of reimbursement
standards   by  private   insurance   programs.   The  Health   Care   Financing
Administration  ("HCFA") has  recently  proposed  rules which would  establish a
prospective  payment  system  for  hospital  outpatient  procedures,   including
lithotripsy.  HCFA's proposed reimbursement rate for lithotripsy is $2,612. This
rate is lower than the typical charge for lithotripsy services currently charged
by the  Partnership  and  could  result  in  private  payment  sources  such  as
third-party   insurers  lowering  the  reimbursement   rates  they  pay  to  the
Partnership.  The  General  Partner  anticipates  that over  time  reimbursement
amounts for both the  professional  and technical  components of the lithotripsy
procedure may continue to decrease. See "Regulation."

     Reliability   and  Efficacy  of  the   Partnership's   Lithotripters.   The
LithostarTM  has a ten-year  United States  operating  history,  having received
premarket  approval  from the FDA for renal  lithotripsy  on September 30, 1988.
This approval  followed a period of clinical testing  beginning in February 1987
at four test sites in the  United  States,  which was  preceded  by  substantial
clinical  testing of the  LithostarTM at the  Urological  Clinic of the Johannes
Gutenberg  University of Mainz, West Germany. The General Partner estimates that
more  than 400  LithostarTM  systems  are  currently  operating  in over  twenty
countries,   and  the  General  Partner  and  its  Affiliates  operate  over  30
LithostarsTM  in  other  ventures.   In  the  General  Partner's  opinion,   the
LithostarTM has proven to be reliable and dependable medical equipment. Downtime
periods  necessitated  for  maintenance or repairs of the  Partnership's  Mobile
Lithotripsy Systems will adversely affect Partnership revenues. In 1996, the FDA
approved a new higher intensity shock-head system for the LithostarTM, which the
General  Partner   believes  has  shortened   procedure   times.   Both  of  the
Partnership's  LithostarsTM  have been upfitted with the new tube system.  Based
upon a  detailed  follow-up  study of 86,000  renal and 51,000  ureteral  stones
treated  on  the  LithostarTM  in  all  of  the  General  Partners's  affiliated
partnerships using both the original and newer shock-head  systems,  the General
Partner notes an 86% total success rate with an overall retreatment rate of only
15%. This retreatment rate included stones of all sizes and locations, including
staghorn calculi which at times required  multiple  treatments.  Based upon this
study and the General  Partner's  experience  in doing well in excess of 128,000
cases  over  the  past  nine  and  one-half  years  in  its  affiliated  limited
partnerships,  the General  Partner is of the opinion  that the  LithostarTM  is
presently a very  effective  and sound  alternative  for the  treatment of renal
stones.

Investors should note that some studies indicate that lithotripsy may cause high
blood pressure and tissue damage.  The General Partner questions the reliability
of these studies and believes  lithotripsy  has become a widely  accepted method
for the treatment of renal stones.

Technological  Obsolescence.  The history of  lithotripsy of kidney stones as an
accepted  treatment  procedure is  relatively  recent,  with the first  clinical
trials being conducted in West Germany beginning in 1980 and the first premarket
approval for a renal  lithotripter in the United States being granted by the FDA
in December 1984.  Today,  lithotripsy is the treatment  procedure of choice for
kidney stone disease, having replaced other treatment methods. Published reports
indicate that certain  researchers are attempting to improve a laser  technology
to more  easily  eradicate  kidney  stones,  and  pharmaceutical  companies  and
researchers have attempted to develop




                                                         2
<PAGE>
a safe drug that can be used to dissolve kidney stones in all cases. The General
Partner cannot predict the outcome of ongoing  research in these areas,  and any
one or more developments could reduce or eliminate  lithotripsy as an acceptable
procedure or treatment method of choice for the treatment of kidney stones.

Partnership  Limited  Resources  and Risks of  Leverage.  The  proceeds  of this
Offering cannot be accurately  determined until the Closing has occurred and the
number of Units sold has been  calculated.  In the event such  proceeds  are not
sufficient  to fund all  anticipated  expenses,  it may be necessary in order to
meet current or projected  expenses,  to supplement  Partnership  funds with the
proceeds of debt financing.  See "Business Activities - Anticipated  Partnership
Expenditures"  and  "Sources  and  Application  of Funds."  Although the General
Partner   maintains  good   relationships   with  certain   commercial   lending
institutions, it has not obtained a loan commitment from any party in any amount
on behalf of the  Partnership  and whether one would  timely be  forthcoming  on
terms  acceptable  to the  Partnership  cannot be assured.  The General  Partner
and/or its  Affiliates  may, but are under no  obligation  to, make loans to the
Partnership,  and there is no assurance that they would be willing or able to do
so at the time, in amounts and on terms required by the  Partnership.  While the
General Partner does not anticipate that it would cause the Partnership to incur
indebtedness unless cash generated from Partnership  operations were at the time
expected to enable  repayment of such loan in accordance  with its terms,  lower
than anticipated  revenues and/or greater than anticipated expenses could result
in the Partnership's  failure to make payments of principal or interest when due
under such a loan and the Partnership's  equity being reduced or eliminated.  In
such event, the Limited Partners could lose their entire investment.

Acquisition  of  Additional  Assets.  If  in  the  future  the  General  Partner
determines  that it is in the best interest of the Partnership to acquire one or
more  additional  fixed base or Mobile  Lithotripsy  Systems (or any other renal
stone  treatment  equipment)  for the  treatment  of renal  stones,  the General
Partner has the authority  (without  obtaining the Limited Partners' consent) to
establish  reserves or borrow  additional  funds on behalf of the Partnership to
accomplish such goals, and may use Partnership assets and revenues to secure and
repay such borrowings.  The acquisition of additional  assets may  substantially
increase the Partnership's  monthly  obligations and result in greater personnel
requirements.  See  "Risk  Factors  -  Operating  Risks  -  Partnership  Limited
Resources  and Risks of  Leverage."  The  General  Partner  does not  anticipate
acquiring additional  Partnership assets unless projected  Partnership Cash Flow
or  proceeds   from  a  Dilution   Offering  are   sufficient  to  finance  such
acquisitions. In any event, no Limited Partner would be personally liable on any
additional  Partnership   indebtedness  without  such  Partner's  prior  written
consent.  There  is no  assurance  that  financing  would  be  available  to the
Partnership  to  acquire  additional  assets or to fund any  additional  working
capital  requirements.  Any such  borrowing  by the  Partnership  will  serve to
increase  the risks to the  Partnership  associated  with  leverage  as provided
above.

Competition.  Many competing  fixed-site and mobile  lithotripters are currently
operating  in and  around  the  Service  Area in  direct  competition  with  the
Partnership's  Mobile Lithotripsy  Systems.  The competing  lithotripsy  service
providers generally have existing contracts

                                                         3

<PAGE>
with  hospitals and other  facilities.  There is no assurance that other parties
will not, in the  future,  operate  fixed-site  or mobile  lithotripters  in and
around the Service Area. To the General  Partner's  knowledge,  no manufacturers
are restricted from selling their  lithotripters to other parties in the Service
Area. In addition,  except as provided by law,  neither the General  Partner nor
its Affiliates are prohibited from engaging in any business or arrangement  that
may compete with the Partnership.  Several ventures  affiliated with the General
Partner provide lithotripsy services in the Service Area's vicinity.  See "Prior
Activities"  and  "Competition."  Affiliates of the General Partner are planning
and  conducting   other  limited   partnership   offerings  that  would  operate
lithotripters  in other states.  In addition,  the Partnership will be competing
with  facilities and individual  medical  practitioners  who offer  conventional
treatment  (e.g.,  surgery) for kidney stones.  In order to be  successful,  the
Partnership must continually  convince  physicians and potential patients of the
quality of the treatment it can provide, its reasonable charges, the superiority
of its  lithotripters to other  lithotripters  and the advantages of lithotripsy
over conventional surgery and other treatment methods. The Partnership Agreement
severely  restricts the Limited  Partners' ability to own interests in competing
equipment or ventures. The enforceability of these noncompetition  agreements is
generally a matter of state law and is evolving  over time.  No assurance can be
given that one or more Limited  Partners may not  successfully  compete with the
Partnership.  See  "Proposed  Activities  - Treatment  Methods for Kidney  Stone
Disease" and "Competition."

Government  Regulation.  All  facets  of  the  healthcare  industry  are  highly
regulated and will become more so in the future.  The ability of the Partnership
to operate  legally and be  profitable  may be adversely  affected by changes in
governmental regulations, including expected changes in reimbursement,  Medicare
and Medicaid certification regulations,  federal and state fraud and abuse laws,
including  the Federal  Anti-kickback  Statute,  the Federal  False  Claims Act,
federal and state  self-referral  laws, state  restrictions on fee splitting and
other governmental regulation. See "Regulation".  These laws and regulations may
adversely  affect the economic  viability of the Partnership and may subject the
General  Partner  and all  Limited  Partners  to  governmental  scrutiny  and/or
prosecution as a felony and punishment in the form of large monetary fines, loss
of  licensure,  imprisonment  and exclusion  from Medicare and Medicaid.  Recent
changes in Medicare and Medicaid law have limited provider ownership and control
over the various health care services to which  physicians may make Medicare and
Medicaid referrals. The primary laws involved are the "Stark II" federal statute
prohibiting  financial  relationships between physicians and certain entities to
which  they  refer  patients,  and the  Anti-Kickback  Statute  which  prohibits
compensation in exchange for or to induce referrals.

Regarding Stark II, in January,  1998, the Health Care Financing  Administration
("HCFA"), the federal agency responsible for administering the Medicare program,
published  proposed  Stark II  regulations.   Under  the  proposed  regulations,
physician  Limited  Partner  referrals  of  Medicare  and  Medicaid  patients to
contracting  hospitals for  lithotripsy  services would be  prohibited.  If HCFA
adopts the proposed Stark II regulations as final,  or if a reviewing court were
to interpret the Stark II  statute using the proposed  regulations  as guidance,
then the Partnership and its physician Limited Partners would be in violation of
Stark II.  In such  instance,  the  Partnership  and/or  its  physician  Limited
Partners may be required to refund any amounts collected from

                                                         4

<PAGE>


Medicare  and Medicaid  patients in  violation  of the statute,  and they may be
subject to civil  monetary  penalties  and/or  exclusion  from the  Medicare and
Medicaid programs.

The  Anti-Kickback  Statute  prohibits  paying or receiving any  remuneration in
exchange for making a referral for healthcare  services which may be paid for by
Medicare,  Medicaid or CHAMPUS.  The law has been broadly interpreted to include
any payments which may induce or influence a physician to refer patients. One of
the federal agencies that enforces the Anti- Kickback Statute has issued several
"safe harbors" which, if complied with, mean the payment or transaction  will be
deemed not to violate  the law.  This  Offering  does not comply  with any "safe
harbor."  There  is  limited   guidance  from  reviewing  courts  regarding  the
application of the broad language of the Anti-Kickback Statute to joint ventures
similar to the one described in this Offering.  In order to prove  violations of
the  Anti-Kickback  law, the government  must establish that one or more parties
offered,  solicited  or paid  remuneration  to induce or reward  referrals.  The
government  has  said  that  in  certain  situations  the  mere  offering  of an
opportunity  to invest in a venture would  constitute  illegal  remuneration  in
violation of the  Anti-Kickback  Statute.  Although the General Partner believes
the structure and purpose of the  Partnership  are in compliance  with the Anti-
Kickback  Statute,  no assurances  can be given that  government  officials or a
reviewing  court would  agree.  Violation  of the  Anti-Kickback  Statute  could
subject the Partnership,  the General Partner and the physician Limited Partners
to criminal  penalties,  fines and/or  exclusion  from the Medicare and Medicaid
programs.

Regarding  state  law,  various  licensure  requirements  must  be met  for  the
Partnership to provide mobile lithotripsy services in Arkansas.  The Partnership
is in compliance with such requirements. See "Regulation - State Regulation".
 
Contract Terms and Termination. The Partnership provides lithotripsy services to
17 Contract Hospitals pursuant to 17 separate Hospital Contracts.  Many, but not
all, of the Hospital  Contracts  grant the  Partnership  the exclusive  right to
provide   Lithotripsy   Services   at   the   particular   Contract   Hospitals.
Substantially,  all of the Hospital Contracts provide for automatic renewal on a
year-to-year basis. Most of the Partnership's  Hospital Contracts are terminated
without  cause upon 90 days or less written  notice by either party prior to any
renewal  date or the  noticed  termination  date,  or upon  customary  events of
default.  Although three other  facilities  recently  terminated their contracts
with  the  Partnership  due to  competition  or the  acquisition  of  their  own
lithotripter,  the General Partner does not anticipate significant  terminations
and believes it has a good  relationship  with many of the  Contract  Hospitals.
There is no assurance,  however, that terminations will either not occur or that
the resulting impact to the Partnership would not have a material adverse effect
on  Partnership  operations.  It is expected that most new  lithotripsy  service
contracts would have one-year terms and be  automatically  renewed unless either
party  elects to cancel prior to the end of the term.  In addition,  many of the
existing contracts have, and any new contracts are expected to have, a provision
permitting  termination in the event certain laws or regulations  are enacted or
applied to the  contracting  parties'  business  arrangements in a manner deemed
materially detrimental to either party. See "Government Regulation" above. Thus,
there is no assurance that Partnership operations as planned on the date of this
Memorandum will occur

                                                         5
<PAGE>

or the Partnership's inability to secure new ones could have a material negative
impact on the financial  condition and results of the Partnership.  In addition,
competing  vendors may attempt to cause certain  Contract  Hospitals to contract
with  them  instead  of the  Partnership.  The  loss of  Contract  Hospitals  to
competition will adversely affect Partnership  revenues and such effect could be
material.   See   "Proposed   Activities   -  Business   Activities  -  Hospital
Contracts"and "Risk Factors - Competition."

Loss on Dissolution and Termination. Upon the dissolution and termination of the
Partnership,  the proceeds  realized from the liquidation of its assets, if any,
will be distributed to its partners only after satisfaction of the claims of all
creditors.  Accordingly,  the ability of a Limited Partner to recover all or any
portion of his investment under such  circumstances will depend on the amount of
funds so realized and the claims to be satisfied therefrom.  See "Summary of the
Partnership Agreement - Optional Purchase of Limited Partner Interests."

Year 2000  Compliance.  The now familiar  "Year 2000 Issue"  arose  because many
existing  computer  programs  use only the last two  digits  to refer to a year.
Therefore,  such computer programs do not properly  recognize a year that begins
with "20" instead of "19." If not corrected,  many computer  applications  could
fail or create erroneous results on January 1, 2000. The extent of the potential
impact of the Year 2000 Issue is not yet known, and if not timely corrected,  it
could affect the global  economy.  The General Partner has made an assessment of
the Partnership's Year 2000 Issue risks and has concluded that the risks include
the following:  (i) operation of the Mobile Lithotripsy Systems may be adversely
affected;  (ii) third party payors may be adversely affected resulting in delays
in payment to the Partnership; (iii) facilities served by the Mobile Lithotripsy
Systems may be  adversely  affected  resulting  in a cessation of service to the
affected  facilities;  and (iv) the Partnership's  internal information systems,
including its accounting  system,  may be adversely affected resulting in record
keeping and accounting delays. Siemens, the manufacturer of the LithostarTM, has
not  assured  Prime  that  its  LithostarTM  lithotripters  will  be  Year  2000
compliant,  in all necessary respects,  i.e., that they will continue to operate
normally  after  January  1, 2000.  The  General  Partner  cannot  predict  with
certainty  whether  such will be the case or the effects of  noncompliance.  The
General  Partner has not inquired as to the Year 2000  readiness of any Contract
Hospital,  vendor or other third party related to the operation of the Business,
but is  relying  that such  parties  will be Year 2000  compliant.  The  General
Partner anticipates that the internal information systems,  including accounting
systems,  that it will use for Partnership  purposes will be Year 2000 compliant
by the end of 1999,  although  no  assurance  can be given that such will be the
case. The Partnership  currently has no contingency  plans in the event that any
of the  above-  described  risks  is  realized.  In the  event  that  any of the
above-described risks are realized, or any other,  unanticipated Year 2000 Issue
problems arise,  the Partnership  could be forced to cease its operations for an
indefinite  period of time while the Year 2000 problems are remedied,  at a cost
which cannot be  accurately  predicted at this time.  Any such  interruption  in
Partnership operations would adversely affect Partnership revenues.


                                                         6

<PAGE>
Tax Risks

Investors  should note that the General  Partner  anticipates no significant tax
benefits  associated with the operation of the Mobile Lithotripsy Systems or the
Partnership. No ruling will be sought from the Service on the federal income tax
consequences of any of the matters discussed in this Memorandum or any other tax
issues  affecting the  Partnership or the Limited  Partners.  The Partnership is
relying upon an opinion of its Counsel with respect to certain  material  United
States  federal  income tax  issues.  Counsel's  opinion  is not  binding on the
Service  as to any  issue,  however,  and  there  can be no  assurance  that any
deductions,  or the  period  in which  deductions  may be  claimed,  will not be
challenged by the Service.  Each Investor should  carefully review the following
risk factors and consult his own tax advisor with respect to the federal,  state
and local income tax consequences of an investment in the Partnership.

THE TAX RISKS SET FORTH IN THIS  SECTION ARE NOT  INTENDED  TO BE AN  EXHAUSTIVE
LIST OF THE GENERAL OR SPECIFIC  TAX RISKS  RELATING TO THE PURCHASE OF UNITS IN
THE  PARTNERSHIP.  EACH  INVESTOR  IS  DIRECTED  TO THE FULL  OPINION OF COUNSEL
(APPENDIX C TO THE  MEMORANDUM).  IT IS STRONGLY  RECOMMENDED THAT EACH INVESTOR
INDE PENDENTLY CONSULT HIS PERSONAL TAX COUNSEL  CONCERNING THE TAX CONSEQUENCES
ASSOCIATED WITH HIS OWNERSHIP OF AN INTEREST IN THE PARTNERSHIP. THE CONCLUSIONS
REACHED IN THE OPINION ARE RENDERED WITHOUT ASSURANCE THAT SUCH CONCLUSIONS HAVE
BEEN OR WILL BE ACCEPTED BY THE SERVICE OR THE COURTS.

THIS MEMORANDUM AND THE OPINION DO NOT DISCUSS, NOR WILL COUNSEL BE RENDERING AN
OPINION  REGARDING,  THE  ESTATE  AND GIFT TAX OR STATE  AND  LOCAL  INCOME  TAX
CONSEQUENCES OF AN INVESTMENT IN THE PARTNERSHIP.  FURTHERMORE, INVESTORS SHOULD
NOTE THAT THE  ANTICIPATED  FEDERAL INCOME TAX  CONSEQUENCES OF AN INVESTMENT IN
THE  PARTNERSHIP  MAY BE  ADVERSELY  AFFECTED  BY FUTURE  CHANGES IN THE FEDERAL
INCOME TAX LAWS, WHETHER BY FUTURE ACTS OF CONGRESS OR FUTURE ADMINISTRATIVE AND
JUDICIAL  INTERPRETATIONS  OF  APPLICABLE  FEDERAL  INCOME TAX LAWS.  ANY OF THE
FOREGOING MAY BE GIVEN RETROACTIVE EFFECT.

Possible  Legislative or Other Actions Effecting Tax  Consequences.  The federal
income tax treatment of an investment in an  equipment/service  oriented limited
partnership such as the Partnership may be modified by legislative,  judicial or
administrative  action at any time, and any such action may retroactively affect
investments  and  commitments  previously  made.  The rules dealing with federal
income  taxation of limited  partnerships  are  constantly  under  review by the
Service,  resulting in revisions of its regulations and revised  interpretations
of established  concepts.  In evaluating an investment in the  Partnership  each
Investor  should  consult with his personal tax advisor with respect to possible
legislative, judicial and administrative developments.

                                                         7
<PAGE>
Disqualification of Employee Benefit Plans. Purchase of Units in the Partnership
may cause certain Limited Partners,  certain hospitals and out-patient  centers,
the  Partnership,  and  employees of the  foregoing to be treated  under Section
414(m) of the Code as being  employed in the  aggregate by a single  employer or
"affiliated  service group" for purposes of minimum coverage,  participation and
other employee benefit plan  requirements  imposed by the Code. In contrast,  an
employer  not  affiliated  under  Section  414(m)  need  only  consider  its own
employees  in  determining  whether its  employee  benefit  plans  satisfy  Code
requirements.  Aggregation of employees could cause the  disqualification of the
retirement plans of certain Limited Partners and related  entities.  Aggregation
could  also  require  the value of the  vested  retirement  benefit  of a highly
compensated  employee who is a participant in a disqualified plan to be included
in his gross income,  regardless  of whether the employee is a Limited  Partner.
These rules may  adversely  affect  Investors  who are  currently  involved in a
medical  practice  joint  venture,  regardless of their purchase of Units in the
Partnership.  The General Partner and legal counsel to the Partnership have been
informally advised by officials of the Service that the Service would not likely
attempt to apply the affiliated service group rules to the Partnership,  nor has
the Service applied these rules to similar  arrangements  in the past.  Informal
discussions with the Service, however, are not binding on the Service, and there
can be no guarantee that the Service will not apply the affiliated service group
rules to the Partnership.

Partnership Allocations.  The Partnership Agreement contains certain allocations
of  profits  and  losses  that could be  reallocated  by the  Service if it were
determined that the allocations did not have  "substantial  economic effect." On
December  31, 1985 the  Regulations  dealing with the  propriety of  partnership
allocations were finalized. As a general rule, allocations of profits and losses
must have  "substantial  economic effect." Based upon current law, Counsel is of
the opinion that, if the question were  litigated,  it is more probable than not
that the allocation of profits and losses set forth in the Partnership Agreement
would be sustained for federal  income tax purposes.  This opinion is subject to
certain  assumptions  and  qualifications.  Investors  are  cautioned  that  the
foregoing  opinion is based in part upon final  regulations  which have not been
extensively commented upon or construed by the courts.

Income in Excess of Distributions.  The Partnership  Agreement  provides that in
each year annual  Distributions  may be made to the Partners.  Excluded from the
definition of cash available for  distribution  is the amount of funds necessary
to discharge  Partnership  debts and to maintain  certain cash  reserves  deemed
necessary by the General  Partner.  If Partnership  Cash Flow is insufficient to
fund expenses and maintain adequate reserves, a Limited Partner could be subject
to income taxes payable out of personal funds to the extent of the Partnership's
income,  if any,  attributed  to him  without  receiving  from  the  Partnership
sufficient  Distributions to pay the Limited  Partner's tax with respect to such
income.

Other Investment Risks

Conflicts  of Interest.  The  activities  of the  Partnership  involve  numerous
existing  and  potential  conflicts  of interest  between the  Partnership,  the
General Partner and their Affiliates.

                                                         8
<PAGE>
See  "Compensation and Reimbursement to the General Partner and its Affiliates,"
"General Partner," "Competition" and "Conflicts of Interest."

No  Participation  in  Management.  The General  Partner has full  authority  to
supervise  the  business  and  affairs  of  the  Partnership   pursuant  to  the
Partnership  Agreement and the Management  Agreement.  Limited  Partners have no
right to participate in the management or conduct of the Partnership's  business
and affairs.  The General  Partner,  its  employees and its  Affiliates  are not
required to devote  their full time to the  Partnership's  affairs and intend to
continue  devoting  substantial  time and  effort in  organizing  and  operating
partnerships and other ventures throughout the United States that are similar to
the  Partnership.  The General  Partner will continue to devote such time to the
Partnership's  business and affairs as it deems necessary and appropriate in the
exercise of reasonable judgment. The participation by any Limited Partner in the
management  or control of the  Partnership's  affairs could render him generally
liable for the  liabilities  of the  Partnership  that could not be satisfied by
assets of the  Partnership.  See the Form of Legal  Opinion  of  Womble  Carlyle
Sandridge & Rice, a Professional  Limited Liability Company,  attached hereto as
Appendix C.

Limited Partners' Obligation to Return Certain Distributions. Except as provided
by other applicable law and provided that a Limited Partner does not participate
in the management of the Partnership,  he will not be liable for the liabilities
of  the  Partnership  in  excess  of  his  investment,   his  ratable  share  of
undistributed  profits and any Distribution received from the Partnership if the
Limited Partner knew at the time of the  Distribution  that, after giving effect
to the Distribution,  all liabilities of the Partnership, other than liabilities
to Partners on account of their Partnership interests,  exceed the fair value of
the assets of the Partnership.

Dilution of Limited Partners'  Interests.  The General Partner has the authority
under the  Partnership  Agreement to cause the  Partnership to issue,  offer and
sell  additional  limited  partnership  interests  in the  future  (a  "Dilution
Offering");  provided that the Percentage  Interests of the General  Partner and
Initial  Limited  Partners,  as in  effect  prior  to the  commencement  of this
Offering,  may  not  be  diluted  through  Dilution  Offerings  (including  this
Offering) by more than 20% in the aggregate without the prior written consent of
a Majority in Interest of all the  Partners.  Upon the sale of  interests in the
Partnership in a Dilution  Offering,  the  Percentage  Interests of the Partners
will be  proportionately  diluted.  See "Summary of the Partnership  Agreement -
Dilution Offerings."

Liability  Under Limited  Partner Loan.  Investors  financing a portion of their
Unit purchase price with the proceeds of a Limited Partner Loan will be directly
obligated to the Bank as provided in the Loan  Documents.  A default  under such
loan could  result in the  foreclosure  of the  Investor's  right to receive any
Partnership Distributions as well as the loss of other personal assets unrelated
to his Partnership  Interest.  Prospective Investors should review carefully all
the  provisions  contained in the Loan  Commitment  and the terms of the Limited
Partner  Note and Loan and  Security  Agreement  with his counsel and  financial
advisors. Neither the Partnership nor the General Partner endorses or recommends
to the prospective  Investors the  desirability of obtaining  financing from the
Bank nor does the summary of the Loan Documents provided

                                                         9
<PAGE>

herein  constitute legal advice. A Limited  Partner's  liability under a Limited
Partner  Note  continues  regardless  of whether the Limited  Partner  remains a
limited partner in the Partnership.  As a consequence,  such liability cannot be
avoided by claims, defenses or set-offs the Limited Partner may have against the
Partnership,  the  General  Partner  or their  Affiliates.  In  addition  to the
suitability  requirements discussed below, any prospective Investor applying for
a Bank loan to fund a portion of his Unit  purchase must be approved by the Bank
for  purposes  of his  delivery  of the  Limited  Partner  Note.  The  Bank  has
established its own criteria for approving the creditworthiness of a prospective
Investor  and has  not  established  objective  minimum  suitability  standards.
Instead, the Bank is empowered to accept or reject prospective Investors.

Long-term Investment.  The General Partner anticipates that the Partnership will
continue to operate the Mobile  Lithotripsy  Systems for an indefinite period of
time  and  that  the  Partnership  will  not  liquidate  prior  to its  intended
termination.  Accordingly,  Investors  should  consider their  investment in the
Partnership as a long-term investment of indefinite duration.

Limited  Transferability  and Illiquidity of Units.  Transferability of Units is
severely restricted by the Partnership Agreement and the Subscription Agreement,
and the consent of the General Partner is necessary for any transfer.  No public
market for the Units exists and none is expected to develop. Moreover, the Units
generally may not be transferred unless the General Partner is furnished with an
opinion of counsel, satisfactory to the General Partner, to the effect that such
assignment or transfer may be effected without registration under the Securities
Act and any state  securities laws  applicable to the transfer.  The Partnership
will be under no obligation  to register the Units or otherwise  take any action
that would enable the assignment or transfer of a Unit to be in compliance  with
applicable federal and state securities laws. Thus, a Limited Partner may not be
able to liquidate an investment in the  Partnership in the event of an emergency
and the Units may not be readily accepted as collateral for loans.  Moreover,  a
sale of a Unit by a Limited  Partner may cause adverse tax  consequences  to the
selling Limited Partner. Accordingly, the purchase of Units must be considered a
long-term  and illiquid  investment.  See "Tax Aspects of the Offering - Sale of
Partnership Units."

Arbitrary Offering Price. The offering price of the Units has been determined by
the General  Partner  based upon  valuation of the  Partnership  conducted by an
independent third party based on various  assumptions that may or may not occur.
A copy of this valuation  will be made available on request.  The offering price
of the Units is not, however, necessarily indicative of their value, if any, and
no assurance  can be given that the Units,  if and when  transferable,  could be
sold for the offering price or for any amount.

Limitation of General Partner's Liability and  Indemnification.  The Partnership
Agreement  provides  that  the  General  Partner  will  not  be  liable  to  the
Partnership  or to any Partner for errors in judgment or other acts or omissions
in  connection  with the  Partnership  as long as the General  Partner,  in good
faith,  determined  such  course  of  conduct  was in the best  interest  of the
Partnership,  except for those involving willful misconduct or gross negligence.
Therefore,  the Limited Partners may have a more limited right of action against
the General Partner in the event

                                                        10


<PAGE>

of its misfeasance or malfeasance than they would have absent the limitations in
the Partnership  Agreement.  The Partnership  will indemnify the General Partner
against  losses  sustained  by  the  General  Partner  in  connection  with  the
Partnership,  unless such losses came as a result of the General Partner's gross
negligence or willful misconduct. In the opinion of the SEC, indemnification for
liabilities  arising out of the  Securities Act is contrary to public policy and
therefore is unenforceable.

Insurance.  Prime  maintains  active  policies of  insurance  for the benefit of
itself  and  certain  affiliated  entities  covering  employee  crime,  workers'
compensation,   business  and  commercial  automobile  operations,  professional
liability,  inland marine,  business interruption,  real property and commercial
liability risks. These policies include the Partnership, and the General Partner
believes that coverage limits of these policies are within  acceptable norms for
the extent and nature of the risks covered.  The  Partnership is responsible for
its share of premium costs. There are certain types of losses, however, that are
either uninsurable or are not economically insurable. For instance,  contractual
liability is generally not covered under  Prime's  policies.  Should such losses
occur with respect to Partnership operations,  or should losses exceed insurance
coverage limits,  the Partnership could suffer a loss of the capital invested in
its Mobile Lithotripsy Systems and any anticipated profits from such investment.

Optional Purchase of Limited Partner  Interests.  As provided in the Partnership
Agreement,  the  General  Partner and the  Limited  Partners  have the option to
purchase  all the  interest  of a Limited  Partner  who (i) dies,  (ii)  becomes
incompetent,  (iii)  becomes  insolvent  or (iv)  acquires a direct or  indirect
ownership of an interest in a competing venture. The option purchase price is an
amount equal to the withdrawing  Limited  Partner's  share of the  Partnership's
book value, if any, as reflected by the Limited Partner's capital account in the
Partnership  (unadjusted for any appreciation as reflected in Partnership assets
and as reduced by  depreciation  deductions  claimed by the  Partnership for tax
purposes).  The option purchase price is likely to be considerably less than the
fair market value of a Limited  Partner's  interest in the Partnership.  Because
losses,  depreciation  deductions and Distributions reduce capital accounts, and
because  appreciation in assets is not reflected in capital accounts,  it is the
opinion of the General  Partner that the option purchase price may be nominal in
amount. See the form of the Partnership  Agreement attached hereto as Appendix A
and "Summary of the Partnership Agreement - Optional Purchase of Limited Partner
Interests."

                                 THE PARTNERSHIP

     Fayetteville  Lithotripters  Limited  Partnership - Arkansas I, an Arkansas
     limited partnership (the "Partnership") was organized and created under the
     Arkansas  Uniform Limited  Partnership Act (the "Act") on January 17, 1990.
     The general  partner of the  Partnership  is  Lithotripters,  Inc., a North
     Carolina corporation (the "General Partner"), and a wholly owned subsidiary
     of Prime Medical Services,  Inc.  ("Prime").  The General Partner currently
     holds a 20%  interest  in the  Partnership  in its  capacity as the general
     partner and the existing limited partners (the "Initial Limited  Partners")
     currently  hold the  remaining 80% interest in the  Partnership  as limited
     partners  (including a 20.66% limited partner  interest held by the General
     Partner). In the event that

                                                        11
<PAGE>
     all 20 Units  offered  hereby  are  sold,  the  General  Partner  will hold
     approximately  a 16%  general  partner  interest  in the  Partnership,  the
     Initial  Limited  Partners will hold  approximately  a 64% limited  partner
     interest  in the  Partnership  and the  Investors  who  purchase  the Units
     offered  hereby (the "New Limited  Partners")  will hold an  aggregate  20%
     interest  in the  Partnership.  The  Percentage  Interests  of the  General
     Partner and Initial  Limited  Partners  (aggregate)  will decrease 0.2% and
     0.8%,  respectively,  for each Unit  sold.  The  principal  address  of the
     Partnership  and the  General  Partner is 2008 Litho  Place,  Fayetteville,
     North  Carolina  28034.  The telephone  number of the  Partnership  and the
     General Partner is (800) 682-7971.

                              TERMS OF THE OFFERING

The Units and Subscription Price

     Fayetteville  Lithotripters  Limited  Partnership  - Arkansas  I, a limited
     partnership  formed under the laws of the State of Arkansas,  hereby offers
     an aggregate  of 20 Units of limited  partner  interest in the  Partnership
     (the "Units").  Each Unit represents an initial 1% economic interest in the
     Partnership.  See "Risk  Factors - Other  Investment  Risks -  Dilution  of
     Limited Partners'  Interests." Each Investor may purchase not less than one
     Unit. The General Partner may, however,  in its sole discretion,  sell less
     than one Unit as a minimum  investment  and  reject in whole or in part any
     subscription.  The  price  for each  Unit is  $16,111  in cash  payable  at
     subscription;  however,  certain qualified Investors may purchase a portion
     of the purchase price through the Limited Partner Loans the Partnership has
     arranged  with the Bank.  See  "Terms  of the  Offering  - Limited  Partner
     Loans." The Proceeds of the Offering will first be used by the  Partnership
     to pay offering costs and expenses,  and the remainder of the proceeds will
     be used to  recondition  the  Partnership's  Coaches  (estimated at $50,000
     each) and pay for "loaner" Mobile  Lithotripsy  Systems during the time the
     Partnership's Coaches are being reconditioned  (estimated at $35,000 loaner
     per month for a two month period). See "Sources and Applications of Funds."
     The  proceeds of this  Offering  cannot be  calculated  until the number of
     Units sold has been  determined at the Closing.  To the extent the proceeds
     of the Offering are insufficient to fund the costs described above, or such
     costs exceed the estimated amounts, it is anticipated that Partnership Cash
     Flow and/or the proceeds of debt financing  will fund such costs.  There is
     no assurance, however, that Partnership Cash Flow or debt financing will be
     available  for  such  purposes.  See  "Risk  Factors  -  Operating  Risks -
     Partnership Limited Resources and Risks of Leverage."

Acceptance of Subscriptions

     An  Investor  that pays the full amount of his or her Unit  purchase  price
     with a check  at  subscription  and  whose  subscription  is  received  and
     accepted  by  the  Partnership,  will  become  a  Limited  Partner  in  the
     Partnership, and his or her subscription funds will be released from escrow
     to the Partnership.  Acceptance by the General Partner of a subscription of
     an  Investor  that elects to finance a portion of the Unit  purchase  price
     with the proceeds of a Limited Partner Note is conditioned  upon the Bank's
     approval of such loan. If the financing Investor is otherwise acceptable

                                                        12
<PAGE>
     to the Partnership,  after receipt of the Bank's approval,  the Partnership
     will  inform  the  Escrow  Agent  that  it  has  accepted  the   Investor's
     subscription  and the Escrow Agent will  release the Loan  Documents to the
     Bank and the Bank will pay the  proceeds  from the Limited  Partner Loan to
     the  Partnership.  The  Investor  will  become  a  Limited  Partner  in the
     Partnership  at the time  the  Bank  releases  the  proceeds  of his or her
     Limited Partner Note to the Partnership.  Subscriptions  may be rejected in
     whole or in part by the  Partnership  and need not be accepted in the order
     received. To the extent the Partnership reduces an Investor's  subscription
     as  provided  above,  the  Investor's  cash  Unit  purchase  price,  or the
     principal  amount of his Limited  Partner Note, as the case may be, will be
     proportionately refunded and reduced. Notice of acceptance of an Investor's
     subscription  to  purchase  Units  and  his  Percentage   Interest  in  the
     Partnership  will be furnished  promptly after acceptance of the Investor's
     Subscription.

Limited Partner Loans

     The  purchase  price for the Units is payable in cash with the  prospective
     Investor's  personal  funds  and/or in part with the  proceeds of a Limited
     Partner Loan. Financing under the Limited Partner Loans was arranged by the
     Partnership  with the Bank as  provided  in the Loan  Commitment,  attached
     hereto as  Appendix B.  If the  prospective  Investor  wishes to  finance a
     portion of the  purchase  price of his Units as  provided  herein,  he must
     deliver to the Sales Agent upon  submission of his  Subscription  Packet an
     executed  Limited  Partner Note payable to the Bank and Note Addendum,  the
     form of which are attached as Exhibit A to the Loan Commitment,  a Loan and
     Security Agreement,  the form of which is attached as Exhibit B to the Loan
     Commitment,  a  Security  Agreement,  the  form of  which  is  attached  as
     Exhibit C to the Loan  Commitment  and two  UCC-1's,  the form of which are
     attached to the Subscription Packet  (collectively,  the "Loan Documents").
     In no event may the maximum amount  borrowed per Unit exceed  $13,611.  The
     Limited Partner Note is repayable in twelve (12) predetermined installments
     in  the  respective   amounts  set  forth  in  the  Loan  Commitment.   The
     installments  are payable on each January 15th,  April 15th,  June 15th and
     September 15th commencing on April 15, 1999 (assuming the Closing occurs in
     1998), with a thirteenth (13th) and final installment in an amount equal to
     the  principal  balance  then  owed on the  Limited  Partner  Note  and all
     accrued,  unpaid interest thereon due and payable on the third  anniversary
     of the first installment date. Interest accrues at the Bank's "Prime Rate,"
     as the same may change  from time to time.  The Prime  Rate  refers to that
     rate  of  interest  established  by the  Bank  and  identified  as  such in
     literature published and circulated within the Bank's offices. Such term is
     used as a  means  of  identifying  a rate of  interest  index  and not as a
     representation by the Bank that such rate is necessarily the lowest or most
     favorable rate of interest  offered to borrowers of the Bank  generally.  A
     prospective  Investor  will have no claim or right of action  based on such
     premise.  See the form of the Limited Partner Note attached as Exhibit A to
     the Loan Commitment.

     The  Limited  Partner  Note will be secured by the cash flow  distributions
     payable with respect to the prospective  Investor's Partnership Interest as
     provided in the Loan and Security  Agreement and the Security Agreement and
     as evidenced by the UCC-1s.  By executing the Loan and Security  Agreement,
     the prospective Investor requests the Bank to extend the Loan Commitment to
     him if he is approved  for a Limited  Partner  Loan.  The Loan and Security
     Agreement also

                                                        13
<PAGE>

     authorizes  (i) the Bank to pay the  proceeds of the Limited  Partner  Note
     directly to the  Partnership  and the  Partnership to  acknowledge  receipt
     thereof and (ii) the Partnership to remit funds directly to the Bank out of
     the prospective  Investor's share of any  Distributions  represented by the
     prospective  Investor's percentage Partnership Interest to fund installment
     payments due on the  prospective  Investor's  Limited Partner Note. See the
     form of the Loan and Security  Agreement  attached as Exhibit B to the Loan
     Commitment which is attached hereto as Appendix B.

     If the  prospective  Investor is approved by the Bank and is  acceptable to
     the  General  Partner,  the  Escrow  Agent  will,  upon  acceptance  of the
     Investor's subscription by the General Partner,  release the Loan Documents
     to the Bank and the Bank will pay the proceeds of the Limited  Partner Note
     to the Partnership to fund a portion of the Investor's  Unit purchase.  The
     prospective  Investor  will have  substantial  exposure  under the  Limited
     Partner  Note.  Regardless  of the  results of  Partnership  operations,  a
     prospective  Investor  will  remain  liable to the Bank  under his  Limited
     Partner Note  according to its terms.  The Bank can  accelerate  the entire
     principal  amount of the Limited Partner Note in the event the Bank in good
     faith  believes  the  prospect  of timely  payment  or  performance  by the
     prospective  Investor is impaired or the Bank otherwise in good faith deems
     itself or its collateral insecure and upon certain other events, including,
     but not  limited  to,  nonpayment  of any  installment.  The  Bank may also
     request  additional  collateral  in the event it deems the Limited  Partner
     Note insufficiently  secured. A Limited Partner's liability under a Limited
     Partner  Note also  continues  regardless  of whether the  Limited  Partner
     remains a limited partner in the Partnership. A Limited Partner's liability
     under a Limited  Partner Note is directly with the Bank. As a  consequence,
     such  liability  cannot be avoided  by claims,  defenses  or  set-offs  the
     Limited  Partner may have against the  Partnership,  the General Partner or
     their  Affiliates.  In addition to the suitability  requirements  discussed
     below,  the prospective  Investor must be approved by the Bank for purposes
     of his delivery of the Limited  Partner Note. The Bank has  established its
     own criteria for approving the  creditworthiness of a prospective  Investor
     and has not established objective minimum suitability  standards.  Instead,
     the Bank is empowered to accept or reject prospective Investors.  See "Risk
     Factors - Other Investment Risks - Liability Under Limited Partner Loans."

Subscription Period; Closing

     The subscription period will commence on the date hereof and will terminate
     at 5:00 p.m.,  Central  time,  on December 30, 1998 (the  "Closing  Date"),
     unless sooner  terminated by the General  Partner or unless extended for an
     additional period up to 180 days. See "Plan of Distribution."

Offering Exemption

     The Units are being  offered and will be sold in  reliance on an  exemption
     from the  registration  requirements  of the  Securities  Act of  1933,  as
     amended,  provided by Section  4(2)  thereof and Rule 506 of  Regulation  D
     promulgated  thereunder,  as amended,  and an exemption  from  registration
     provided by Section 23-42-509(c) of the Arkansas Code of 1987 Annotated, as
     amended, and Rule 509.01(B) of the regulations promulgated  thereunder,  as
     amended. The suitability

                                                        14
<PAGE>

          standards  set forth  below have been  established  in order to comply
          with the terms of these offering exemptions.

Suitability Standards

          In addition to the  suitability  requirements  discussed  below,  each
          Investor  wishing to obtain a Limited Partner Loan must be approved by
          the Bank. The Bank has  established its own criteria for approving the
          credit-worthiness  of  Investors  and  has not  established  objective
          minimum suitability standards.  The Bank has sole discretion to accept
          or reject any Investor.

          An investment in the  Partnership  involves a high degree of financial
          risk and is suitable only for persons of substantial  financial  means
          who have no need for liquidity in their investments and who can afford
          to lose all of their investment.  See "Terms of The Offering - Limited
          Partner Loans." An Investor should not purchase a Unit if the Investor
          does  not have  resources  sufficient  to bear the loss of the  entire
          amount of the purchase  price,  including  any portion  financed.  The
          General   Partner   anticipates   selling  Units  only  to  individual
          investors;  however,  the General  Partner  reserves the right to sell
          Units to entities.

          Because of the risks involved, the General Partner anticipates selling
          the Units only to  Investors  residing in Arkansas  who it  reasonably
          believes meet the definition of "accredited  investor" as that term is
          defined in Rule 501 under the  Securities  Act, but reserves the right
          to  sell to a  limited  number  of  Investors  who  are  nonaccredited
          investors.  Certain  institutions  and the following  individuals  are
          "accredited investors":

          (1) An individual  whose net worth (or joint net worth with his or her
          spouse) exceeds $1,000,000 at the time of subscription;

          (2) An  individual  who has had an  individual  income  in  excess  of
          $200,000  in  each  of the  two  most  recent  fiscal  years  and  who
          reasonably  expects an individual  income in excess of $200,000 in the
          current year; or

          (3) An individual who has had with his or her spouse a joint income in
          excess of $300,000 in each of the two most recent fiscal years and who
          reasonably expects a joint income in excess of $300,000 in the current
          year.

          Investors  must  also be at  least  21 years  old and  otherwise  duly
          qualified  to acquire  and hold  partnership  interests.  The  General
          Partner  reserves  the right to refuse  to sell  Units to any  person,
          subject to Federal and applicable state securities laws.

          Each Investor must make an independent  judgment, in consultation with
          his own counsel,  accountant,  investment advisor or business advisor,
          as to whether an investment  in the Units is advisable.  The fact that
          an Investor meets the Partnership's suitability standards should in no
          way be taken  as an  indication  that an  investment  in the  Units is
          advisable for that Investor.


                                                        15
<PAGE>

          It is anticipated that suitability  standards  comparable to those set
          forth  above will be imposed by the  Partnership  in  connection  with
          resales,  if any, of the Units.  Transferability  of Units is severely
          restricted  by  the   Partnership   Agreement  and  the   Subscription
          Agreement. See "Summary of the Partnership Agreement."

          Investors  who wish to  subscribe  for  Units  must  represent  to the
          Partnership  that they meet the foregoing  standards by completing and
          delivering  to the Sales Agent a Purchaser  Questionnaire  in the form
          included in the Subscription Packet. Each Purchaser Representative, if
          any,  acting on behalf of an Investor in connection with this offering
          must   complete   and   deliver  to  the  Sales   Agent  a   Purchaser
          Representative  Questionnaire  (a  copy of  which  is  available  upon
          request to the General Partner).

How to Invest

          Investors  who  meet  the   qualifications   for   investment  in  the
          Partnership and who wish to subscribe for Units may do so as follows:

          a. By completing,  dating,  signing and acknowledging the Subscription
          Agreement  and  the  Counterpart  Signature  Page  to the  Partnership
          Agreement (the forms of which are included in the Subscription  Packet
          accompanying this Memorandum);

          b. By completing,  dating and signing the Purchaser Questionnaire (the
          form of which is included in the Subscription Packet accompanying this
          Memorandum);

          c. By having any purchaser  representative  who has acted on behalf of
          the Investor in connection with this Offering complete,  date and sign
          the  Purchaser  Representative  Questionnaire  (a  copy  of  which  is
          available upon request to the General Partner);

          d. By completing, dating and signing the Purchaser Financial Statement
          (in the form included in the Subscription Packet), or in lieu thereof,
          substituting the Investor's own personal executed financial statement,
          as long as such substitute  statement contains the same information as
          in  the  form  provided,  and  attaching  to the  Purchaser  Financial
          Statement or substitute  statement,  as the case may be, pages one and
          two of the Investor's  most recently  filed Form 1040 U.S.  Individual
          Income Tax Return;

          e. If the  Investor  is  financing  of a portion of the Unit  purchase
          price with a Limited  Partner Loan, by completing  and signing (on the
          front  and the  back),  but not  dating,  a Limited  Partner  Note and
          signing the form of Note Addendum  attached thereto (the form of which
          Limited  Partner Note (including the Note Addendum) is included in the
          Subscription  Packet  and  is  attached  as  Exhibit  A  to  the  Bank
          Commitment);


                                                        16
<PAGE>

          f. If the  Investor  is  financing  of a portion of the Unit  purchase
          price with a Limited  Partner Loan, by completing and signing (but not
          dating) the Loan and Security Agreement (the form of which is included
          in the  Subscription  Packet and is  attached as Exhibit B to the Bank
          Commitment);

          g. If the  Investor  is  financing  of a portion of the Unit  purchase
          price with a Limited  Partner Loan, by completing and signing (but not
          dating) the Security  Agreement  (the form of which is included in the
          Subscription  Packet  and  is  attached  as  Exhibit  C  to  the  Bank
          Commitment);

          h. If the Investor is financing a portion of the Unit  purchase  price
          with a Limited  Partner Loan, by completing  and signing two copies of
          the UCC-1 (the form of which is included in the Subscription  Packet);
          and

          i. By delivering or mailing all of the foregoing together with a check
          in the amount of $16,111 per Unit  subscribed  for, or $2,500 per Unit
          subscribed  for if the  investor  is  financing  a portion of the Unit
          purchase   price   through  a  Limited   Partner   Loan,   payable  to
          "First-Citizens  as Escrow  Agent for  Litho  L.P.-Arkansas  I" to the
          Sales Agent at 2008 Litho Place, Fayetteville, North Carolina 28304.

          All  information  provided by Investors,  including the information in
          the Purchaser  Questionnaire  and the Purchaser  Financial  Statement,
          will be kept confidential and not disclosed except to the Partnership,
          the  General  Partner,  the  Bank and  their  respective  counsel  and
          Affiliates   and,  if  required,   to   governmental   and  regulatory
          authorities.

Restrictions on Transfer of Units

          The Units have not been  registered  under the Securities Act or under
          any  state  securities  laws and  holders  of  Units  have no right to
          require the  registration  of such Units or to require the Partnership
          to disclose publicly information concerning the Partnership. Units can
          be  transferred  only in accordance  with the  provisions of, and upon
          satisfaction   of,  the  conditions  set  forth  in  the   Partnership
          Agreement. Among other things, the Partnership Agreement provides that
          no  assignment  of Units may be made if such  assignment  could not be
          effected  without  registration  under  the  Securities  Act or  state
          securities laws. Moreover, the assignment generally must be made to an
          individual  approved by the General  Partner who meets the suitability
          requirements described in this Memorandum.

          Assignors of Units will be required to execute certain  documents,  in
          form and substance satisfactory to the General Partner, instructing it
          to  effect  the  assignment.  Assignees  of  Units  may  also,  in the
          discretion  of the General  Partner,  be required to pay all costs and
          expenses of the Partnership with respect to the assignment.


                                                        17
<PAGE>

          Any   assignment  of  Units  or  the  right  to  receive   Partnership
          Distributions  in respect of Units will not release the assignor  from
          any  liabilities   connected  with  the  assigned   Units,   including
          liabilities  under any Limited  Partner Loan. An assignee,  whether by
          sale or otherwise, will acquire only the rights of the assignor in the
          profits and capital of the Partnership and not the rights of a Limited
          Partner,  unless such assignee becomes a substituted  Limited Partner.
          An assignee may not become a substituted  Limited  Partner without (i)
          either the written consent of the assignor and the General Partner, or
          the consent of a Majority in Interest of the Limited  Partners (except
          the  assignor  Limited  Partner)  and the  General  Partner,  (ii) the
          submission  of certain  documents  and (iii) the  payment of  expenses
          incurred  by  the  Partnership  in  effecting  the  substitution.   An
          assignee,  regardless  of  whether he  becomes a  substituted  Limited
          Partner,  will be subject to and bound by all the terms and conditions
          of the Partnership  Agreement with respect to the assigned Units.  See
          "Summary of the  Partnership  Interest -  Restrictions  on Transfer of
          Partnership Interests."

                                               PLAN OF DISTRIBUTION
          Subscriptions  for Units will be  solicited  by  MedTech  Investments,
          Inc., the Sales Agent,  which is an Affiliate of the General  Partner.
          The Sales Agent has entered  into a Sales  Agency  Agreement  with the
          Partnership  pursuant  to which the Sales  Agent has  agreed to act as
          exclusive agent for the placement of the Units on a "best efforts" any
          or all basis. The Sales Agent is not obligated to purchase any Units.

          The Sales  Agent is a North  Carolina  Corporation  that was formed on
          December 23, 1987, and became a member of the National  Association of
          Securities  Dealers on March 15, 1988. The Sales Agent will be engaged
          in other  similar  offerings on behalf of the General  Partner and its
          Affiliates during the pendency of this offering and in the future. The
          Sales Agent is a wholly owned subsidiary of Prime, which also owns all
          the stock of the General  Partner.  Investors should note the material
          relationship  between the Sales Agent and the General Partner, and are
          advised that the relationship  creates  conflicts in the Sales Agent's
          performance  of its due diligence  responsibilities  under the Federal
          securities laws.

          As  compensation  for its  services,  the Sales  Agent will  receive a
          commission equal to $250 for each Unit sold. No other commissions will
          be paid in connection with this Offering. Subject to the conditions as
          provided  above,  the Sales Agent may be reimbursed by the Partnership
          for its out-of-pocket  expenses  associated with the sale of the Units
          in an amount  not to exceed  $7,500.  The  Partnership  has  agreed to
          indemnify  the Sales  Agent  against  certain  liabilities,  including
          liabilities under the Securities Act.

          The Partnership will not pay the fees of any purchaser representative,
          financial advisor, attorney,  accountant or other agent retained by an
          Investor in connection with his or her decision to purchase Units.

                                                        18
<PAGE>

          The  subscription  period  will  commence  on the date hereof and will
          terminate at 5:00 p.m.,  Little Rock,  Arkansas  time, on December 30,
          1998, (or earlier,  in the discretion of the General Partner),  unless
          extended at the  discretion  of the General  Partner for an additional
          period not to exceed 180 days.

          The  Partnership  seeks by this Offering to sell a maximum of 20 Units
          for a maximum of an  aggregate  of $322,220 in cash  ($317,220  net of
          Sales Agent Commissions). The Partnership has set no minimum number of
          Units to be sold in this Offering.  The  subscription  funds, and Loan
          documents,  if any, received from each Investor will be held in escrow
          (which,  in the case of cash subscription  funds,  shall be held in an
          interest  bearing  escrow  account  with the Bank)  until  either  the
          Investor's  subscription is accepted by the Partnership  (and approved
          by the  Bank  in  the  case  of  financed  purchases  of  Units),  the
          Partnership  rejects the  subscription  or the Offering is terminated.
          Upon the receipt and acceptance of an Investor's subscription,  which,
          if the  Investor  intends to  finance a portion  of the Unit  purchase
          price with a Limited Partner Loan, will be conditioned upon the Bank's
          approval of the Loan, the Investor will be admitted to the Partnership
          as a  Limited  Partner.  Upon  admission  as a  Limited  Partner,  the
          Investor's  subscription  funds will be  released  from  escrow to the
          Partnership,  and the Loan Documents,  if any, will be released to the
          Bank which will pay the proceeds from the Limited  Partner Note to the
          Partnership.  In  the  event  a  subscription  is  not  accepted,  all
          subscription  funds (without  interest),  the Loan Documents and other
          subscription documents held in escrow will be promptly returned to the
          rejected  Investor.  The Offering will terminate on December 30, 1998,
          unless it is  sooner  terminated  by the  General  Partner,  or unless
          extended for an additional  period not to exceed 180 days.  See "Terms
          of the Offering - Subscription Period; Closing."


                                                BUSINESS ACTIVITIES

General

          The Partnership was formed to (i) acquire a Mobile  Lithotripsy System
          and  operate it at  various  locations  primarily  in  Arkansas,  (ii)
          improve the provision of health-care in the Partnership's service area
          by taking advantage of both the technological  innovations inherent in
          the LithostarTM and the  Partnership's  quality  assurance and outcome
          analysis  programs,  and (iii) make cash distributions to its Partners
          from  revenues  generated by the  operation of the Mobile  Lithotripsy
          System.  The  Partnership  owns and  operates  two Mobile  Lithotripsy
          Systems in the Service Area and has contracted with 17 hospitals,  and
          medical centers and ambulatory surgical centers to provide lithotripsy
          services for a per procedure fee.

Treatment Methods for Kidney Stone Disease

          Urolithiasis,  or kidney stone disease,  affects an estimated  600,000
          persons per year in the United States. The exact cause of kidney stone
          formation  is  unclear,  although  it has  been  attributed  to  diet,
          climate, metabolism and certain medications.  Approximately 75% of all
          urinary

                                                        19
<PAGE>

          stones  pass  spontaneously,  usually  within  one to two  weeks,  and
          require  little or no  clinical or  surgical  intervention.  All other
          kidney  stones,  however,  require  some form of medical  or  surgical
          treatment.  A number of methods  are  currently  used to treat  kidney
          stones.  These methods include drug therapy,  cystoscopic  procedures,
          endoscopic procedures,  laser procedures,  open surgery,  percutaneous
          lithotripsy and  extracorporeal  shock wave  lithotripsy.  The type of
          treatment a urologist  chooses  depends on a number of factors such as
          the size of the stone,  its location in the urinary system and whether
          the  stone is  contributing  to other  urinary  complications  such as
          blockage or infection.  The  extracorporeal  shock wave  lithotripter,
          introduced  in the  United  States  from  West  Germany  in 1984,  has
          dramatically changed the course of kidney stone disease treatment. The
          General  Partner  estimates  that  currently  up to 95% of all  kidney
          stones  that  require   treatment  can  be  treated  by   lithotripsy.
          Lithotripsy  involves  the use of shock waves to  disintegrate  kidney
          stones noninvasively.

The LithostarTM

     The  LithostarTM was developed as a cooperative venture between Siemens and
          the Urological Clinic at Johannes Gutenberg  University in Mainz, West
          Germany.  As a part of  this  venture,  a  LithostarTM  prototype  was
          installed in March 1986 at the Urological  Clinic at the University of
          Mainz with  successful  results.  On November 18, 1987 the LithostarTM
          was  unanimously  recommended for approval by the FDA's advisory panel
          of experts for urology devices.  On September 30, 1988 the LithostarTM
          received FDA premarket approval for use in the United States for renal
          lithotripsy.  On April 18, 1989, the FDA approved the  LithostarTM for
          mobile  lithotripsy.  On July 1, 1996,  the FDA  approved a new higher
          intensity  shock-head  system for the LithostarTM which has since been
          installed in both of the Partnership's  LithostarsTM.  Currently,  the
          General Partner  estimates that more than 400 LithostarTM  systems are
          performing  lithotripsy procedures in over 20 countries throughout the
          world.  All components of the LithostarTM are manufactured by Siemens,
          a diversified multinational company.

     The  LithostarTM was designed with a view towards  substantially  improving
          early  lithotripsy  technology.  See "Proposed  Activities - Treatment
          Methods  for  Kidney  Stone   Disease  -   Extracorporeal   Shock-Wave
          Lithotripsy."   Technological   improvements   incorporated  into  the
          LithostarTM  include an improved work station, a shock-wave  component
          that  has  eliminated  the  need for both  water  bath  treatment  and
          disposable electrodes, and an excellent stone localization and imaging
          system.  Based  upon  its  experience  in its  affiliated  lithotripsy
          ventures,  the General  Partner  believes  that most  patients  can be
          treated  with the  LithostarTM  without  anesthesia  of any kind.  The
          General  Partner also  believes  that  LithostarsTM  upfitted with the
          higher  intensity   shock-head  system  experience   somewhat  shorter
          treatment durations.

     Based upon  its   experience   with  30  LithostarsTM   in  other   limited
          partnerships sponsored by the General Partner and its Affiliates,  the
          General  Partner has found that the  LithostarTM can crush most kidney
          stones  without  anesthesia,  cystoscopy  or the insertion of ureteral
          catheters.  Because of the General  Partner's  belief in the  superior
          imaging  of  the  LithostarTM,   the  General  Partner  believes  that
          lithotripsy  with the  LithostarTM  provides  for  treatment  of lower
          ureteral

                                                        20
<PAGE>

          stones,   even  impacted  stones,   thereby   rendering   urethroscopy
          practically obsolete as a treatment of first choice.

The Calumet Coaches

     The  Calumet Coach is a  self-propelled  motor vehicle  manufactured by the
          Calumet  Coach Company of Calumet City,  Illinois.  The  Partnership's
          Calumet Coach which houses its first  LithostarTM  was first placed in
          operation  by the  Partnership  in 1990 and its  Calumet  Coach  which
          houses the second  LithostarTM  was first  placed in operation in 1982
          and acquired by the Partnership in 1996. The Calumet Coach Company has
          manufactured  self-propelled  coaches  upfitted  for the  provision of
          various medical  services for since the early 1980's.  It is estimated
          by the  manufacturer  that it  currently  has over 200  self-propelled
          medical service  coaches in operation.  The coaches have housed CT and
          other  imaging   equipment,   as  well  as  lithotripsy   machines  of
          manufacturers other than Siemens.

          The Calumet Coach has been completely upfitted for the LithostarTM and
          its  clinical  operations.  In the  procedure  mode,  with  slide-outs
          expanded,  the interior  square  footage is  approximately  276 square
          feet.  The coach is easy to drive and can be  operated  by a radiology
          technician, thus there is no need for an additional or special driver.

          Service for the Calumet Coaches is obtained on an as-needed basis. The
          General Partner estimates that expenditures for maintenance and repair
          have been  incurred  at a rate of  approximately  $15,000 per year per
          Coach.

Anticipated Partnership Expenditures

          Both of the Partnership's Coaches are scheduled to be reconditioned in
          1999 and 2000, respectively at an estimated cost of $50,000 per Coach,
          which  amount  would be paid to AK  Associates,  an  Affiliate  of the
          General  Partner engaged in the selling and  refurbishment  of medical
          equipment trailers and coaches. See "Compensation and Reimbursement to
          the General  Partner and its  Affiliates."  Reconditioning  of a Coach
          typically  takes  six to eight  weeks  and  consists  of  removal  and
          reinstallation  of  the  lithotripter,  replacement  of  the  interior
          floors,  cabinets and wall coverings,  exterior body work,  repainting
          and  re-decaling the exterior and service to the expanding wall slide-
          outs.  During the time a Coach is being  refurbished,  the Partnership
          would likely rent a  replacement  Mobile  Lithotripsy  System from the
          General  Partner or its  Affiliates  at an estimated per month rate of
          $35,000.  Any necessary Coach maintenance is likely to be performed by
          an Affiliate of the General Partner at commercially  reasonable rates.
          See  "Compensation  and  Reimbursement  to the General Partner and its
          Affiliates."

Acquisition of Additional Assets

          If in the future the General Partner determines that it is in the best
          interest  of the  Partnership  to  acquire  (i) an  additional  Mobile
          Lithotripsy System or (ii) any other assets related to

                                                        21
<PAGE>

          the  provision  of  lithotripsy  services,  the General  Partner  may,
          without  the consent of the Limited  Partners,  establish  reserves or
          borrow funds on behalf of the Partnership to acquire such assets,  and
          may use  Partnership  assets  and  revenues  to secure  and repay such
          borrowings.  Any additional borrowing by the Partnership will serve to
          increase the risks associated with leverage.

Hospital Contracts

          The Partnership  has entered into Hospital  Contracts with 17 Contract
          Hospitals  to operate the Mobile  Lithotripsy  Systems at the Contract
          Hospitals.  Most of the Hospital Contracts have an initial term of one
          year and  automatically  renew for successive  one-year periods unless
          the  Partnership  or the hospital  delivers to the other party written
          notice of its  decision  not to renew the  agreement  at least 60 days
          prior  to the  anticipated  termination  date.  Most  of the  Hospital
          Contracts  are  terminated  without  cause  by  either  party on short
          notice, generally 90 days or less. The Contract Hospitals are:


AMI National Park Medical Center, Hot Springs
BEC Surgery Center, Hot Springs
Baptist Medical Center, Little Rock
Baptist Memorial Medical Center, Little Rock
Baxter County Regional Hospital, Mountain Home
Conway Regional Hospital, Conway
Jefferson Regional Medical Center, Pine Bluff
The Medical Center of South Arkansas, El Dorado
Ouachita County Hospital, Camden
Physicians Surgery Center, Little Rock
Rebsaman Regional Medical Center, Jacksonville
Saline Memorial Hospital, Benton
Sparks Regional Medical Center, Fort Smith
St. Bernard's Regional Medical Center, Jonesboro
St. Joseph's Regional Health Center, Hot Springs
White County Memorial Hospital, Searcy
White River Medical Center, Batesville


                                                        22
<PAGE>

          The Hospital  Contracts  require  each  hospital to provide the Mobile
          Lithotripsy Systems with site pad space, utility hookups, nonphysician
          medical personnel and billing and accounting  services in exchange for
          the  right  to  collect  a fee  from  each  patient  who  undergoes  a
          Lithotripsy  procedure  at  that  hospital.  The  General  Partner  is
          attempting to negotiate similar  agreements with additional  hospitals
          or outpatient surgical centers located in Arkansas.

          The  Partnership  or hospital  charge a lithotripsy  technology fee to
          each patient  treated with a  LithostarTM  which is separate and apart
          from any  professional  fee charged by the  physician who performs the
          lithotripsy  procedure.  The  technology  fee received from  privately
          insured patients averages  approximately $3,500 while the fee received
          from government  program patients is  significantly  less. There is no
          assurance  that these fee levels can be maintained as the  lithotripsy
          fees charged by the  Partnership  or hospitals  are largely  dependent
          upon the amount of  reimbursement  private  health care  insurers will
          allow for this procedure.  In addition, most of the Hospital Contracts
          provide  that  the  fee  charged  to  public  program  payors  by  the
          Partnership for use of the lithotripter  must at all times be equal to
          or less than the lowest amount the  Partnership  charges any privately
          insured   patient.   See  "Risk  Factors  -  Dependence  on  Insurance
          Reimbursement."

Management

          The  Partnership   has  entered  into  a  management   agreement  (the
          "Management  Agreement")  with the General Partner whereby the General
          Partner is obligated to supervise and  coordinate  the  management and
          administration of the operation of the Mobile  Lithotripsy  Systems on
          behalf of the  Partnership  in exchange for a monthly  management  fee
          equal to the  greater  of 7.5% of  Partnership  Cash Flow per month or
          $8,000 per month. See  "Compensation  and Reimbursement to the General
          Partner and its Affiliates." The General Partner's  services under the
          Management  Agreement include training physicians in the proper use of
          the  LithostarsTM,   monitoring  technological developments  in  renal
          lithotripsy  and  advising  the  Partnership  of  these  developments,
          arranging  continuing  education programs for qualified physicians who
          use the  LithostarsTM  and  providing  advertising,  billing, accounts
          collection,  equipment maintenance, medical supply inventory and other
          incidental  services  necessary  for the  efficient  operation  of the
          Mobile Lithotripsy  Systems.  Costs incurred by the General Partner in
          performing  its  duties  under  the   Management   Agreement  are  the
          responsibility of the Partnership.  The General  Partner's  engagement
          under the  Management  Agreement is as an  independent  contractor and
          neither the Partnership nor its Limited Partners have any authority or
          control  over the  method  or  manner  in which  the  General  Partner
          performs its duties under the  Management  Agreement.  The  Management
          Agreement  is in the first  5-year  renewal  term and will be up for a
          second renewal for an additional  five-year term in 2000.  Thereafter,
          it  will  be  automatically  renewed  for an  additional  term  unless
          terminated by the Partnership or the General Partner.

Employees

          The  Partnership  employs  as full  time  employees  a  total  of four
          registered technicians and four registered nurses.

                                                        23
<PAGE>


                                                THE GENERAL PARTNER

          General.  The General  Partner of the  Partnership  is  Lithotripters,
          Inc., a North Carolina  corporation  formed in  November 1987  for the
          purpose  of  sponsoring  medical  service  limited  partnerships.  The
          General  Partner was founded by William R.  Jordan,  M.D. and became a
          wholly owned  subsidiary of Prime in 1996. See "Conflicts of Interest"
          and "Prior  Activities." The principal executive office of the General
          Partner is located at 2008 Litho Place,  Fayetteville,  North Carolina
          28304, and its telephone number is (800) 682-7971.

          Management.  The following  table sets forth the names and  respective
          positions  of  the  individuals  serving  as  executive  officers  and
          directors of the General  Partner,  many of whom were  shareholders of
          the  General  Partner  prior to its  acquisition  by Prime  and/or are
          current shareholders and/or management personnel of Prime.

                  Name                                        Office
 
                  Joseph Jenkins, M.D.        President, Chief Executive Officer
                                                          and Director
                  Kenneth S. Shifrin          Director
                  W. Alan Terry               Chief Financial Officer
                  Cheryl Williams             Vice President and Director
                  Philip J. Gallina           Secretary and Treasurer

          Supervision of the day-to-day  management  and  administration  of the
          Partnership is the responsibility of the General Partner.  The General
          Partner  itself  is  managed  by a  three-member  Board  of  Directors
          composed of Dr.  Jenkins,  Mr. Shifrin and Ms.  Williams.  The General
          Partner is a wholly-owned subsidiary of Prime.

          Descriptions of the background of the executive officers and directors
          of the General Partner appear below.

          Joseph  Jenkins,  M.D.  has been  President of Prime since April 1996.
          From May 1990 until December 1991, Dr. Jenkins was a Vice President of
          the General  Partner and previously  practiced  urology in Washington,
          North Carolina.  Dr. Jenkins has been President of the General Partner
          since  1992 and was  recently  elected to is Board of  Directors.  Dr.
          Jenkins is a board certified  urologist and is a founding member,  the
          immediate  past-president  and  currently a Director  of the  American
          Lithotripsy Society.

          Kenneth S.  Shifrin  has been  Chairman of the Board and a Director of
          Prime since  October 1989 and was  recently  elected a Director of the
          General Partner  following  Prime's  acquisition of all of the General
          Partner's stock. Mr. Shifrin also has served in various capacities

                                           24
<PAGE>

          with American  Physicians  Service Group,  Inc. ("APS") since February
          1985,  and is  currently  Chairman  of the Board  and Chief  Executive
          Officer of APS.

          W. Alan Terry has been Chief Financial  Officer of the General Partner
          since 1991.  In August,  1986,  Mr.  Terry  joined The May  Department
          Stores Company at their corporate  headquarters in St. Louis, where he
          held several financial management positions until October,  1987, when
          he was transferred to one of May's largest divisions, Caldor, Inc., as
          Vice  President of Finance.  He remained in that capacity  until June,
          1990, when he became Chief  Operating  Officer for the General Partner
          and served in that capacity until April 1996.

          Cheryl  Williams  is a  Director  and Vice  President  of the  General
          Partner.   Ms.  Williams  has  been  Chief  Financial  Officer,   Vice
          President-Finance  and  Secretary  of Prime  since  October 1989.  Ms.
          Williams  was  Controller  of  Fairchild  Aircraft   Corporation  from
          August 1988 to October 1989. From 1985 to 1988, Ms. Williams served as
          the Chief Financial Officer of APS Systems, Inc.

          Philip J.  Gallina  recently became the Secretary and Treasurer of the
          General Partner,  having  previously  served as a Vice President since
          1989. Mr.  Gallina is a Certified  Public  Accountant  licensed in the
          state of  Pennsylvania.  From 1980 through  February 1989, Mr. Gallina
          served as Plant  Controller  for the  Westinghouse  Motor  Control and
          Enclosed  Control Product Lines.  Mr. Gallina is also a Director,  the
          Vice   President,   the   Treasurer   and  the  Secretary  of  MedTech
          Investments, Inc., the Sales Agent.

                      COMPENSATION AND REIMBURSEMENT TO THE
                       GENERAL PARTNER AND ITS AFFILIATES

          The following summary describes the types and, where determinable, the
          estimated amounts of  reimbursements,  compensation and other benefits
          the General Partner and its Affiliates will receive in connection with
          the continued  operation and  management  of the  Partnership  and the
          Mobile Lithotripsy Systems. None of such fees,  compensation and other
          benefits has been determined at arm's length. Except for the items set
          forth  below,  the  General  Partner  does not expect to  receive  any
          distribution,   fee,  compensation  or  other  remuneration  from  the
          Partnership. See "Business Activities - Management and Administration"
          and "Plan of Distribution."

          1. Management Fee. Pursuant to the Management  Agreement,  the General
          Partner  has  contracted   with  the   Partnership  to  supervise  the
          management  and  administration  of the  day-to-day  operations of the
          Partnership's  lithotripsy  business  for a  monthly  fee equal to the
          greater  of $8,000 or 7.5% of  Partnership  Cash Flow per  month.  All
          costs  incurred by the General  Partner in performing its duties under
          the  Management  Agreement  are the  responsibility  of,  and are paid
          directly or reimbursed by, the Partnership. The General Partner is the
          management agent for various  affiliated  lithotripsy  ventures.  As a
          consequence,  many of the General Partner's  employees provide various
          management  and   administrative   services  for  numerous   ventures,
          including the Partnership.

                                                        25
<PAGE>

          In order to  properly  allocate  the  costs of the  General  Partner's
          employees  and other  overhead  expenses  among the entities for which
          they  provide  services,  such  costs  will be  divided  among all the
          ventures based upon the relative  number of patients  treated by each.
          The  General  Partner  believes  that the  sharing  of  personnel  and
          overhead costs among various  entities  results in  significant  costs
          savings for the Partnership. The management fee for any given month is
          payable on or before the 30th day of the next  succeeding  month.  The
          Management  Agreement  is in its first  five-year  renewal  term which
          expires  in  2000.  The  Management  Agreement  will be  automatically
          renewed for up to two additional  successive five-year terms unless it
          is earlier  terminated by the Partnership or the General Partner.  The
          General  Partner  is  reimbursed  by the  Partnership  for  all of its
          out-of- pocket costs  associated with the operation of the Partnership
          and the Mobile  Lithotripsy  Systems,  and the Partnership will pay or
          reimburse  to  the  General  Partner  all  expenses  related  to  this
          Offering. No other fees or compensation will be payable to the General
          Partner or its Affiliates for managing the Partnership  other than the
          management  fee  payable to the  General  Partner as  provided  in the
          Management Agreement. The Partnership may, however,  contract with the
          General  Partner or its Affiliates to render other services or provide
          materials to the Partnership  provided that the compensation is at the
          then  prevailing  rate  for the  type  of  services  and/or  materials
          provided.

          2.  Partnership  Distributions.  In its capacity as general partner of
          the  Partnership,  the General  Partner is entitled its  distributable
          share (20%,  before  dilution) of Partnership  Cash Flow,  Partnership
          Sales Proceeds and Partnership Refinancing Proceeds as provided by the
          Partnership Agreement.  The General Partner also owns a 20.66% (before
          dilution)  limited partner interest in the Partnership and is entitled
          to  Distributions  on account of such  interest.  See  "Summary of the
          Partnership  Agreement - Profits,  Losses and  Distributions"  and the
          Partnership Agreement attached as Appendix B.

          3. Sales  Commissions.  The Sales Agent, a wholly-owned  subsidiary of
          Prime,  has entered into a Sales Agency Agreement with the Partnership
          pursuant  to which the Sales  Agent has  agreed to sell the Units on a
          "best efforts" any or all basis. As compensation for its services, the
          Sales Agent will receive a commission equal to $250 for each Unit sold
          (up to an aggregate of $5,000).  If the  offering is  successful,  the
          Sales  Agent  will  also  be  reimbursed  by the  Partnership  for its
          out-of-pocket  expenses  associated  with its sale of the  Units in an
          amount not to exceed $7,500. See "Plan of Distribution" and "Conflicts
          of Interest."

          4.  Reconditioning  of  Coaches.  It is  anticipated  that the General
          Partner will cause the Partnership to contract with AK Associates,  an
          Affiliate  of  the  General  Partner,   to  recondition  each  of  the
          Partnership's Coaches in 1999 and 2000, respectively,  at an estimated
          per Coach cost of $50,000.  In addition,  it is  anticipated  that the
          General  Partner  will  cause the  Partnership  to  contract  with the
          General Partner or its affiliates to rent "loaner" Mobile  Lithotripsy
          Systems   during  the  time  the   Partnership's   Coaches  are  being
          reconditioned  at an  estimated  per month  price of $35,000 per unit.
          Reconditioning is expected to take six to eight weeks. Accordingly, it
          is anticipated  that the Partnership will pay an aggregate of $140,000
          to the General  Partner and its  Affiliates  for loaner units over the
          next two years. The Partnership may require additional loaner units or
          rental time in the event any of the Partnership's  Mobile  Lithotripsy
          Systems experience

                                                        26
<PAGE>

          substantial down time for other maintenance or repairs.  See "Business
          Activities - Anticipated Partnership Expenditures."

          5. Loans.  The General  Partner or its  Affiliates  will also  receive
          interest  on  loans,  if any,  made by  them to the  Partnership.  See
          "Conflicts  of Interest."  Neither the General  Partner nor any of its
          Affiliates are,  however,  obligated to make loans to the Partnership.
          While the General  Partner does not anticipate that it would cause the
          Partnership   to  incur   indebtedness   unless  cash  generated  from
          Partnership  operations were at the time expected to enable  repayment
          of such loan in  accordance  with its terms,  lower  than  anticipated
          revenues and/or greater than anticipated  expenses could result in the
          Partnership's  failure to make  payments of principal or interest when
          due under such a loan and the  Partnership's  equity being  reduced or
          eliminated.  In such  event,  the  Limited  Partners  could lose their
          entire investment.

                              CONFLICTS OF INTEREST

          The  operation  of the  Partnership  involves  numerous  conflicts  of
          interest  between  the  Partnership  and the  General  Partner and its
          Affiliates.  Because  the  Partnership  is  operated  by  the  General
          Partner,   such  conflicts  are  not  resolved  through  arm's  length
          negotiations,  but through the exercise of the judgment of the General
          Partner  consistent with its fiduciary  responsibility  to the Limited
          Partners and the Partnership's investment objectives and policies. The
          General  Partner,  its Affiliates and employees of the General Partner
          will in good faith continue to attempt to resolve potential  conflicts
          of interest with the Partnership,  and the General Partner will act in
          a  manner  that  it  believes  to be in or not  opposed  to  the  best
          interests of the Partnership.

          The General  Partner and its Affiliates  will receive  management fees
          and  broker-dealer  sales  commissions in connection with the business
          operations of the  Partnership  and the sale of the Units that will be
          paid  regardless of whether any sums  hereinafter  are  distributed to
          Limited  Partners.  None of such fees,  compensation  and benefits has
          been  determined  by  arm's  length  negotiations.  In  addition,  the
          Partnership may contract with the General Partner or its Affiliates to
          render other services or provide materials to the Partnership provided
          that the  compensation  is at the then prevailing rate for the type of
          services and/or materials provided. It is anticipated that the General
          Partner and/or its Affiliates will receive fees for reconditioning the
          Partnership's  Coaches  and rental  payments  in  connection  with the
          provision of loaner  Mobile  Lithotripsy  Systems  during the time the
          Coaches are being reconditioned. The General Partner will also receive
          interest  on  loans,  if  any,  it  makes  to  the  Partnership.   See
          "Compensation  and  Reimbursement  to  the  General  Partner  and  its
          Affiliates."

          The General  Partner and its  Affiliates  will devote as much of their
          time to the  business  of the  Partnership  as in  their  judgment  is
          reasonably  required.  Principals  of the  General  Partner  may  have
          conflicts  of interest in  allocating  management  time,  services and
          functions among their various existing and future business  activities
          in which they are or may become involved. See "Competition" and "Prior
          Activities."  The  General  Partner  believes  it and its  Affiliates,
          together,
                                                        27
<PAGE>

          have  sufficient  resources  to be  capable of fully  discharging  the
          General  Partner's  and  its  Affiliates'   responsibilities   to  the
          Partnership.  The General  Partner and its  Affiliates  may engage for
          their own  account,  or for the account of others,  in other  business
          ventures,  related to medical  services or otherwise,  and neither the
          Partnership  nor the  holders of any of the Units shall be entitled to
          any interest therein. The General Partner,  its Affiliates  (including
          affiliated limited  partnerships) and employees of the General Partner
          engage in  medical  service  activities  for their own  accounts.  See
          "Prior Activities." The General Partner may serve as a general partner
          of other limited  partnerships that are similar to the Partnership and
          does not intend to devote its entire  financial,  personnel  and other
          resources to the Partnership.  Except as provided by law, none of such
          entities or their respective Affiliates is prohibited from engaging in
          any  business  or  arrangement  that  may be in  competition  with the
          Partnership.  An affiliate of the General Partner,  Prime Lithotripter
          Operations,  Inc.  d/b/a  Tennessee  Valley  Lithotripter,  operates a
          lithotripsy  services  venture  that  provides  services  to  Arkansas
          Methodist  Hospital in  Paragould,  Arkansas.  The General  Partner is
          planning  other  limited  partnership  offerings  that  would  operate
          lithotripsy businesses in other states. See "Competition."

          The Sales Agent is MedTech Investments, Inc., which is an Affiliate of
          the General Partner. Because of the Sales Agent's affiliation with the
          General Partner,  there are conflicts in the Sales Agent's performance
          of its due  diligence  responsibilities  under the federal  securities
          laws. See "Plan of Distribution."

          The  interests  of the  Limited  Partners  have  not  been  separately
          represented  by  independent   counsel  in  the   formulation  of  the
          transactions  described herein. The attorneys and accountants who have
          performed and will perform  services for the Partnership were retained
          by the  General  Partner,  and  have  in the  past  performed  and are
          expected  in the future to perform  similar  services  for the General
          Partner, and Prime.

                 FIDUCIARY RESPONSIBILITY OF THE GENERAL PARTNER

          The General  Partner is accountable to the  Partnership as a fiduciary
          and  consequently  must  exercise  good faith in handling  Partnership
          affairs. This is a rapidly developing and changing area of the law and
          Limited  Partners  who have  questions  concerning  the  duties of the
          General   Partner  should  consult  with  their  counsel.   Under  the
          Partnership Agreement,  the General Partner and its Affiliates have no
          liability to the  Partnership  or to any Partner for any loss suffered
          by the  Partner  ship that arises out of any action or inaction of the
          General  Partner  or its  Affiliates  if the  General  Partner  or its
          Affiliates,  in good faith, determined that such course of conduct was
          in the best interest of the Partnership and such course of conduct did
          not constitute gross  negligence or willful  misconduct of the General
          Partner or its Affiliates.  Accordingly,  Limited Partners have a more
          limited  right  of  action  than  they  otherwise   would  absent  the
          limitations  set  forth  in the  Partnership  Agreement.  The  General
          Partner and its  Affiliates  will be  indemnified  by the  Partnership
          against any losses, judgments,  liabilities, expenses and amounts paid
          in settlement of any claims  sustained by them in connection  with the
          Partnership, provided that the same were not the result of gross

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<PAGE>

          negligence or willful misconduct on the part of the General Partner or
          its Affiliates.  Insofar as indemnification  for liabilities under the
          Securities Act may be permitted to persons controlling the Partnership
          pursuant  to  the  foregoing  provisions,  the  Partnership  has  been
          informed  that in the  opinion  of the  SEC  such  indemnification  is
          against public policy as expressed in the Securities Act and therefore
          is unenforceable.

                                   COMPETITION

          Many  competing  fixed-site  and  mobile   extracorporeal   shock-wave
          lithotripters are currently  operating in and around the Service Area.
          The competing  lithotripsy  service providers  generally have existing
          contracts with hospitals, or are operated by hospitals themselves. The
          following  discussion  identifies  the  existing  competitors  in  the
          Service Area, to the best knowledge of the General Partner.

Affiliated Competition

          Affiliates of the General Partner presently provide mobile lithotripsy
          services in Arkansas and in  surrounding  states.  Prime  Lithotripter
          Operations, Inc., d/b/a Tennessee Valley Lithotripter, provides mobile
          lithotripsy  services at  Arkansas  Methodist  Hospital in  Paragould,
          though its primary  operations are in Tennessee.  Other  Affiliates of
          the General Partner provide mobile lithotripsy  services in the states
          surrounding Arkansas.

Other Competition

          The Partnership  faces  competition  from other  lithotripsy  services
          offered in the geographic area served by the Partnership.  To the best
          knowledge  of  the  General  Partner,   Medstone   provides  a  mobile
          lithotripter  at  University  Hospital  of  Arkansas  in Little  Rock,
          Washington  Regional  Medical  Center  in  Fayetteville,   at  Central
          Arkansas Hospital in Searcy,  Crawford Memorial Hospital in Van Buren,
          Bates Medical  Center in  Bentonville,  White River Medical  Center in
          Batesville  (where the Partnership also operates a Mobile  Lithotripsy
          System)  and in  Texarkana.  A  mobile  lithotripter  (brand  unknown)
          provide  services at North  Arkansas  Medical  Center in  Harrison.  A
          Dornier  MFL-5000  provides  fixed-base  services at St.  Vincent's in
          Little Rock. Tenet Hospital  provides a mobile Lithostar at St. Mary's
          Regional Medical Center in Russellville  and at Methodist  Hospital in
          Jonesboro.  A mobile  Lithostar  provides  services  at Baxter  County
          Regional  Hospital  in  Mountain  Home  (where  the  Partnership  also
          operates its Mobile Lithotripsy System).  Other hospitals,  ambulatory
          surgery  centers  or other  healthcare  facilities  in and  around the
          Service  Area,  including  Missouri,  may  provide  or have  access to
          lithotripsy services, whether fixed-base or mobile.

          Other  hospitals  in the Service  Area served by the  Partnership  may
          operate   lithotripters   which  are  not  extracorporeal   shock-wave
          lithotripters   but  rather   use   lasers  or  are   electrohydraulic
          lithotripters.  The General  Partner  believes both these machines are
          qualitatively inferior to the

                                                        29
<PAGE>

          LithostarTM because the machines are limited to treatment of stones in
          the ureter and because anesthesia is required prior to treatment.  The
          LithostarTM  can be used on stones in locations  other than the ureter
          and no anesthesia is required  generally.  See "Proposed  Activities -
          Treatment Methods for Kidney Stone Disease".

          The  General  Partner  is  generally  unfamiliar  with the cost of the
          lithotripsy procedures offered by the Partnership's  competitors.  The
          General Partner  believes the Partnership has a competitive  advantage
          over  many  competitors  because  the  LithostarTM  is technologically
          superior to many other  lithotripters.  This competitive  advantage is
          further  enhanced  by the  General  Partner's  expertise  in  training
          physicians in the low-intensity  lithotripsy technique.  See "Proposed
          Activities - Description of the LithostarTM".

          There is no assurance that new competing  lithotripsy clinics will not
          open in the  future  or that  innovations  in  lithotripters  or other
          treatments  of  kidney  stone  disease  will not make the  LithostarTM
          competitively   obsolete.  See  "Risk  Factors  -  Operating  Risks  -
          Technological Obsolescence".  In addition, the General Partner and its
          Affiliates  are not restricted  from engaging in lithotripsy  ventures
          unassociated   with  the  Partnership   which  may  compete  with  the
          Partnership.

          The General  Partner  recently  proposed to the Limited  Partners  for
          approval an amendment to the Partnership  Agreement designed to expand
          the  prohibition  on  competition by Limited  Partners;  however,  not
          enough Limited Partners voted to adopt the amendment,  and the General
          Partner withdrew it.

     Siemens is under no obligation to the General Partner or the Partnership to
          refrain from selling LithostarTM  systems to urologists,  hospitals or
          other persons for use in Arkansas or elsewhere.  In addition,  several
          medical  equipment  manufacturers  are expected to offer  lower-priced
          lithotripters for sale, which could  dramatically  increase the number
          of  lithotripters  in the  United  States,  increase  competition  for
          lithotripsy  procedures and create downward pressure on the prices the
          Partnership can charge for its services. Lithotripters can be obtained
          from manufacturers other than Siemens. The General Partner is familiar
          with many of the  lithotripters  offered  by other  manufacturers  and
          believes  that while some may be offered  for a lower  purchase  price
          than the LithostarTM,  their higher operating costs, particularly with
          respect  to   electrode   replacement   costs  not  present  with  the
          LithostarTM, make them more expensive than the LithostarTM in the long
          run.  Potential  competitors  also  have  access  to  newer  and  less
          expensive  lithotripters,  including  transportable  models  which are
          capable of more  efficiently  serving  multiple sites.  Many potential
          competitors  of  the  Partnership,  including  hospitals  and  medical
          centers, have financial resources, staffs and facilities substantially
          greater than those of the Partnership and of the General Partner.



                                                        30
<PAGE>

                                                    REGULATION

Federal Regulation

          The  Partnership  is subject to regulation  at the federal,  state and
          local level. An adverse review or determination by certain  regulatory
          organizations  (federal,  state or private) may result in improvement,
          loss of  reimbursement,  fines  or  exclusion  from  participation  in
          Medicare or Medicaid.  Therefore,  adverse  reviews of the Partnership
          operations  at any of the  various  regulatory  levels  may  adversely
          affect the operations and profitability of the Partnership.

          Reimbursement.  The Partnership will be subject to federal  government
          oversight as the Partnership will seek  reimbursement for its services
          to  patients  who  are  beneficiaries  of the  Medicare  and  Medicaid
          programs.  Medicare reimbursement policies are statutorily created and
          are  regulated  by the federal  government.  Currently,  the  Medicare
          program pays for renal  lithotripsy  services  under Part A (inpatient
          hospital  service)  and Part B  (outpatient  and  physician  services)
          benefits to the beneficiary.

          Medicare  has  adopted  a  prospective   payment,   diagnostic-related
          grouping  ("DRG")  based  reimbursement  system  for Part A  inpatient
          hospital services. A DRG has been established for extracorporeal shock
          wave  lithotripsy  services for renal kidney stones.  The value of the
          DRG,   and  thus  the  amount  of   reimbursement   payable   for  the
          nonprofessional  service  (nonphysician)  component of the lithotripsy
          service,  is adjusted for various  factors  including,  among  others,
          whether the  facility  is located in an urban  area,  local labor cost
          indices and case-mix for the particular  hospital or other facility at
          which the  service is  provided.  All of these  factors are subject to
          periodic  recalculation  and change  depending upon events outside the
          control of the  Partnership.  The General  Partner  believes  that the
          Partnership's  lithotripsy procedures will not generally be subject to
          the  current  DRG program  because  the DRG  program  applies  only to
          inpatient procedures,  and lithotripsy  procedures can be performed on
          an outpatient basis for most patients.

          The  Balanced  Budget  Act  of  1997  required  HCFA  to  establish  a
          prospective  payment  system for  outpatient  procedures.  HCFA issued
          proposed  regulations on September 8, 1998.  HCFA proposes a base rate
          of  $2,612  for  outpatient  lithotripsy  procedures,  which  includes
          anesthesia  and  sedation,  equipment  and supplies  necessary for the
          procedure,  but does not include the treating physician's professional
          fee. The base rate is subject to  adjustment  in a fashion  similar to
          the adjustments for inpatient reimbursement discussed in the preceding
          paragraph.  The proposed regulations state HCFA plans to implement the
          outpatient  prospective  payment system sometime after January 1, 2000
          (although  the  Balanced  Budget Act  contemplated  implementation  by
          January 1,  1999). The General Partner believes that implementation of
          the proposed base rate for lithotripsy procedures will have an adverse
          effect on the Partnership's revenues.

          Proposed  HCFA rules  issued on June 12, 1998  setting the  ambulatory
          surgery center rate for various procedures  include  lithotripsy among
          those  procedures  approved  for  Medicare  reimbursement.  While  the
          proposed rules had a target effective date of October 1, 1998, the

                                                        31
<PAGE>

          effective date has been postponed  indefinitely for reasons  unrelated
          to  lithotripsy  coverage.  However,  the proposed  rules'  commentary
          discusses  the  history  of  attempts  by HCFA  several  years  ago to
          authorize Medicare reimbursement for lithotripsy at ambulatory surgery
          centers.  These  attempts (in 1990 and 1991) were  enjoined by federal
          courts in litigation  initiated by the American  Lithotripsy  Society,
          which  challenged  the  reimbursement  rates proposed by HCFA ($812 in
          1990 and $1,150 in 1991). The proposal for reimbursement  contained in
          the June 1998 proposed rules assigns a Medicare  reimbursement rate of
          $2,107 for  lithotripsy if the procedure is performed at an ambulatory
          surgery center.  Whether these proposed rules will become effective to
          authorize Medicare reimbursement at ambulatory surgery centers and, if
          they do become effective, whether the proposed reimbursement rate will
          remain unchanged, is unknown to the General Partner.

          HCFA's rates under the proposed outpatient  prospective payment system
          and ambulatory surgery center reimbursement are lower than the General
          Partner's typical charges for the procedure. Medicare reimbursement is
          not expected to constitute  more than  one-third of the  Partnership's
          revenues.  However, the Medicare program has become an industry leader
          in setting  reimbursement  standards which influence private insurance
          programs.   Therefore,   implementation  of  the  proposed  outpatient
          prospective payment system or ambulatory surgery center  reimbursement
          may negatively  affect  reimbursement by private  insurance  programs,
          which could have a material adverse effect on Partnership revenues.

          The  physician  service  (Part B)  Medicare  reimbursement  for  renal
          lithotripsy is determined using Resource  Based-Relative  Value Scales
          ("RB-RVS").  The  system  includes  limitations  on  future  physician
          reimbursement  increases tied to annual expenditure targets legislated
          annually by Congress or set based upon recommendation of the Secretary
          of the U.S.  Department of Health and Human Services.  Medicare has in
          the  past,  with  regard to other  Part B  services  such as  cataract
          implant surgery, imposed significant reductions in reimbursement based
          upon changes in technology.  Thus,  changes in lithotripsy  technology
          will be subject to review by the Medicare program and potential future
          decreases  in  reimbursement  must  be  considered   probable  as  the
          lithotripsy  procedure has been identified by the Medicare  program as
          an overvalued one.

          The Medicaid  program in Arkansas is jointly  sponsored by the federal
          and state  governments  to  reimburse  service  providers  for medical
          services  provided  to  Medicaid  recipients,  who are  primarily  the
          indigent.   The   Arkansas   Medicaid   program   currently   provides
          reimbursement   for  lithotripsy   services.   The  federal   Personal
          Responsibility  and  Work  Opportunity   Reconciliation  Act  of  1996
          requires state health plans, such as the Arkansas Medicaid program, to
          limit Medicaid  coverage for certain otherwise  eligible persons.  The
          General  Partner  does  not  believe  this  legislation  will  have  a
          significant impact on the Partnership's revenues. In addition, federal
          regulations  permit  state  health  plans to limit  the  provision  of
          services  based  upon such  criteria  as  medical  necessity  or other
          criteria  identified in utilization or medical review procedures.  The
          General  Partner does not know whether the Arkansas  Medicaid  program
          has taken or will take such steps.

          Self-Referral   Restrictions.   Health   care   entities   which  seek
          reimbursement for services covered by Medicare or Medicaid are subject
          to federal regulation restricting referrals by

                                                        32
<PAGE>

          certain  physicians. Congress  has  passed  legislation  prohibiting
          physician  self-referral of patients for "designated health services",
          which include  inpatient and outpatient  hospital  services (42 U.S.C.
          Section1395nn)("Stark II"). Lithotripsy services were not specifically
          identified as a designated health service by this legislation, but the
          prohibition  includes any service  which is provided to an  individual
          who is registered  as an inpatient or  outpatient of a hospital  under
          proposed regulations discussed below. Lithotripsy services provided by
          the  Partnership  to Medicare and Medicaid  patients are billed by the
          contracting  hospital in its name and under its  Medicare and Medicaid
          program provider  numbers.  Accordingly,  these  lithotripsy  services
          would likely be  considered  inpatient or  outpatient  services  under
          Stark II.

     Following the  passage  of the Stark II  legislation  effective  January 1,
          1995, the General Partner determined that the statute did not apply to
          the  Partnership's  lithotripsy  services.  Stark II  applies  only to
          ownership  interests  in the entity that  "furnishes"  the  designated
          health care service. The  physician-investors and the Partnership will
          not have an ownership  interest in any provider  hospitals which offer
          the lithotripsy services to the patients on an inpatient or outpatient
          basis.  See 42 U.S.C.  Section  1395nn(a)(1)(A).  Thus, by referring a
          patient to a hospital  offering the service,  the  physician-investors
          will not be making a referral  to an entity in which they  maintain an
          ownership interest for purposes of the application of Stark II.

          This interpretation adopted by the General Partner was consistent with
          the  informal  view  of the  General  Counsel's  Office  of  the  U.S.
          Department of Health and Human  Services.  Based upon this  reasonable
          interpretation  of Stark II, by  referring  a  patient  to a  hospital
          furnishing the outpatient  lithotripsy  services "under  arrangements"
          with the Partnership,  a physician  investor in the Partnership is not
          making a referral to an entity (the hospital) in which he or she has a
          financial relationship.

          On January 9, 1998, the Health Care Financing Administration ("HCFA"),
          the federal agency responsible for administering the Medicare program,
          published proposed regulations  interpreting the Stark II statute (the
          "Proposed  Stark II  Regulations").  The Proposed Stark II Regulations
          and  HCFA's  accompanying  commentary  apply  the  physician  referral
          prohibitions  of Stark II to the  Partnership's  typical  practice  of
          contracting  "under  arrangements"  with  hospitals  for treatment and
          billing of Medicare and Medicaid patients. Under the Proposed Stark II
          Regulations,  physician  Limited  Partner  referrals  of Medicare  and
          Medicaid patients to contracting hospitals would be prohibited because
          the  Partnership is regarded as an entity that  "furnishes"  inpatient
          and outpatient hospital services.  HCFA, however,  acknowledges in its
          commentary  to  the  Proposed  Stark  II  Regulations  that  physician
          overutilization  of lithotripsy is unlikely and specifically  solicits
          comments  on  whether  there  should  be a  regulatory  exception  for
          lithotripsy.  HCFA has  received a  substantial  volume of comments in
          support   of   a   regulatory   exception   for   lithotripsy.    HCFA
          representatives have informally acknowledged to representatives of the
          General  Partner that some form of regulatory  relief for  lithotripsy
          may be forthcoming;  however, no assurances can be made that such will
          be the case.


                                                        33
<PAGE>

          At the present time the Stark II regulations  are only  proposed,  and
          HCFA has solicited public comments on them. The General Partner cannot
          predict when final  regulations will be issued or the substance of the
          final  regulations,  but the  interpretive  provisions of the Proposed
          Stark II  Regulations  may be viewed as HCFA's interim  position until
          final regulations are issued.

          If the Proposed  Stark II  Regulations  become final in their  present
          form (or if, in the meantime, a reviewing court adopts their positions
          as the  proper  interpretation  of the  Stark  II  statute),  then the
          Partnership  may be given the opportunity to bring its operations into
          compliance.  In the event the  General  Partner  is unable to devise a
          plan pursuant to which the  Partnership may operate in compliance with
          Stark II and its final  regulations,  the General Partner is obligated
          under the Partnership  Agreement either (i) to purchase the Investment
          Interests of all the Limited  Partners at their Capital Account values
          or (ii) to dissolve and liquidate the Partnership. See "Summary of the
          Partnership Agreement - Optional Purchase of Investment Interests."

          HCFA's adoption of the current  Proposed Stark II Regulations as final
          or a  reviewing  court's  interpretation  of the Stark II  statute  in
          reliance on the Proposed Stark II Regulations  and in a manner adverse
          to the Partnership  operations would mean that the Partnership and its
          physician  Limited  Partners are in violation of Stark II. The General
          Partner  does not believe  either of the above  instances  will occur;
          however, no assurances can be made. In either instance,  however,  the
          Partnership and/or the physician Limited Partners may not be permitted
          the  opportunity  to  restructure  operations  and  thereby  avoid  an
          obligation to refund any amounts  collected from Medicare and Medicaid
          patients  in   violation  of  the   statute.   Further,   under  these
          circumstances  the Partnership and physician  Limited  Partners may be
          assessed with  substantial  civil monetary  penalties and/or exclusion
          from providing services reimbursed by Medicare and Medicaid.

          The  General  Partner  will  continue  to work  through  the  American
          Lithotripsy  Association  to  encourage  the  adoption of  legislation
          supportive  of  urologists'  ability to  lawfully  maintain  ownership
          interests  in ventures  that  provide  lithotripsy  services to all of
          their  patients.  Additionally,  the General  Partner will continue to
          carefully  review the Proposed Stark II Regulations  and  accompanying
          HCFA  commentary,  and explore other  alternative  plans of operations
          that would allow the  Partnership to operate in compliance  with Stark
          II and its final regulations.

          Fraud and Abuse.  The  provisions of the federal  Social  Security Act
          addressing illegal remuneration (the "Anti-Kickback Statute") prohibit
          providers and others from soliciting,  receiving,  offering or paying,
          directly or indirectly, any remuneration in return for either making a
          referral  for a  Medicare,  Medicaid  or  CHAMPUS  covered  service or
          ordering,  arranging  for or  recommending  any such covered  service.
          Violations of the  Anti-Kickback  Statute may be punished by a fine of
          up to $25,000 or  imprisonment  for up to five (5) years,  or both. In
          addition,  violations may be punished by substantial  civil  penalties
          and/or  exclusion from the Medicare and Medicaid  programs.  Regarding
          exclusion,  the Office of Inspector  General ("OIG") of the Department
          of Health and Human Services may exclude a provider from participation
          in the  Medicare  program for a 5-year  period upon a finding that the
          Anti-Kickback Statute has been violated. After OIG

                                                        34
<PAGE>

          establishes a factual basis for excluding a provider from the program,
          the burden of proof shifts to the provider to prove the  Anti-Kickback
          Statute has not been violated.

          The  Limited  Partners  are to  receive  cash  Distributions  from the
          Partnership. Since it is anticipated that some of the Limited Partners
          will be  physicians  or other  entities  in a  position  to refer  and
          perform   lithotripsy   services  using   Partnership   equipment  and
          personnel,  such  Distributions  could come under  scrutiny  under the
          Anti-Kickback  Statute.  The  Third  Circuit  United  States  Court of
          Appeals  has held that the  Anti-Kickback  Statute is  violated if one
          purpose (as opposed to the primary or sole  purpose) of a payment to a
          provider is to induce referrals.  U.S. v. Greber,  760 F.2d 68 (1985).
          The Greber case was followed by the United States Court of Appeals for
          the  Ninth  Circuit,  United  States v.  Kats,  871 F.2d 105 (9th Cir.
          1989),  and cited  favorably by the First  Circuit in United States v.
          Bay State  Ambulance and Hospital  Rental  Service,  Inc., 874 F.2d 20
          (1st Cir.  1989).  Since none of these  cases  involved a  lithotripsy
          syndication or joint venture such as the Partnership,  it is not clear
          how a court would apply  these  holdings to the facts  related to this
          Offering.

          The  OIG  has  indicated  that  it is  giving  increased  scrutiny  to
          healthcare  joint  ventures  involving  physicians  and other referral
          sources. In May 1989, it published a Special Fraud Alert that outlined
          questionable  features of "suspect"  joint  ventures,  including  some
          features  which may be common to the  Partnership.  While OIG  Special
          Fraud Alerts do not constitute law, they are informative  because they
          reflect the general  views of the OIG as a healthcare  fraud and abuse
          investigator and enforcer.

          The OIG has published  regulations which protect certain  transactions
          from  scrutiny  under the  Anti-Kickback  Statute  (the "Safe  Harbor"
          regulations).  A Safe Harbor, if complied with fully, will exempt such
          activity from prosecution  under the Anti-Kickback  Statute.  However,
          the preamble to the Safe Harbor regulations states that the failure of
          a particular business  arrangement to comply with the regulations does
          not  determine  whether  or not the  arrangement  violates  the  Anti-
          Kickback  Statute  because the  regulations do not themselves make any
          particular conduct illegal.  Any conduct that could be construed to be
          illegal after the  promulgation of the Safe Harbor  regulations  would
          have been illegal prior to the publication of the regulations.

          Prospective   Limited   Partners  should  note  that  the  anticipated
          ownership and operations of the  Partnership may not fully comply with
          any Safe Harbor;  however, the preamble to the Safe Harbor regulations
          makes  clear that the  failure to comply  with a Safe  Harbor does not
          mean the arrangement  violates the Anti-Kickback  Statute.  Although a
          separate Safe Harbor was not adopted,  HCFA noted in its commentary to
          the Safe Harbor regulations that additional  protection may be merited
          for  situations  where a  physician  sees a patient  in his or her own
          office,  makes a  referral  to an  entity  in  which  he or she has an
          ownership  interest and performs the service for which the referral is
          made. In such cases,  Medicare makes a payment to the facility for the
          service it furnishes, which may result in a profit distribution to the
          physician.   HCFA  noted  that,   with  respect  to  the   physician's
          professional fee, such a referral is simply a referral to oneself, and
          that in such  situations,  both the  professional  service fee and the
          profit distribution from the associated facility

                                                        35
<PAGE>

          fee that are generated from the referral may warrant protection.  HCFA
          stated that its primary concern regarding the above referral situation
          was the investing  physician's  ability to profit from any  diagnostic
          testing that is generated  from the services he or she  performs.  The
          potential  for  overutilization  posed  by  referrals  for  diagnostic
          services is not present to the same degree with  therapeutic  services
          such as  lithotripsy  where the  necessity  for the  treatment  can be
          objectively  determined;   i.e.,  a  renal  stone  can  be  definitely
          determined before treatment.

          The   applicability   of  the   Anti-Kickback   Statute  to  physician
          investments in health care businesses to which they refer patients and
          which do not qualify for a Safe Harbor is unclear. In the only case in
          which the OIG has attempted to exercise the civil exclusion  remedy in
          the context of a physician-owned joint venture, The Hanlester Network,
          et al. v.  Shalala,  the Ninth  Circuit for the United States Court of
          Appeals (the "Court") held that the Anti-Kickback  Statute is violated
          when a person or entity (a) knows that the statute prohibits  offering
          or  paying  remuneration  to  induce  referrals  and  (b)  engages  in
          prohibited  conduct  with the  specific  intent  to  violate  the law.
          Although the Court upheld a lower court ruling that the joint  venture
          in question violated the Anti-Kickback Statute vicariously through the
          knowing  and  willful  actions  of one of its  agents,  who was acting
          outside the parameters of the joint venture's offering documents,  the
          Court  concluded there was not sufficient  evidence  indicating that a
          return on investment  to  physicians  or other  investors in the joint
          venture  could  on  its  own  constitute  an  "offer  or  payment"  of
          remuneration  to make  referrals.  The Court  also  stated  that since
          profit  distributions  in Hanlester were made based on each investor's
          ownership  share  and not on the  volume of  referrals,  the fact that
          large  referrals  by  investors  would  result  in  potentially   high
          investment  returns did not, standing alone,  cause a violation of the
          Anti- Kickback Statute.

          The  Health  Insurance  Portability  and  Accountability  Act of  1996
          directed  the  OIG  to  respond  to  requests  for  advisory  opinions
          regarding  the  effect  of the fraud and  abuse  statute  on  proposed
          business  transactions.  The General Partner has not requested the OIG
          to review  this  Offering  and, to the best  knowledge  of the General
          Partner,  the OIG has not been asked by anyone to review  offerings of
          this  type.  Thus,  federal  regulatory  authorities  could  take  the
          position  that this  Offering is a means to  illegally  influence  the
          referral  patterns  of the  prospective  physician  Limited  Partners.
          Because  there  is  no  legal  precedent  interpreting   circumstances
          identical to these facts, it is not possible to predict how this issue
          may be resolved if litigated.

          Whenever an offering  of  ownership  interests  is made  available  to
          persons with the potential to refer patients for services,  there is a
          possibility  that the  OIG,  HCFA or other  government  officials  may
          question whether the ownership  interests are being provided in return
          for or to induce  referrals  by the new  owners.  Remuneration,  which
          government  officials  have  said  can  include  the  provision  of an
          opportunity to invest in a facility to which a person refers  patients
          for services,  under such facts may be challenged by the government as
          constituting  a violation of the  Anti-Kickback  Statute.  Whether the
          offering of ownership interests to investors who may refer patients to

                                                        36
<PAGE>

          distributions of earnings to Limited Partners be made in proportion to
          their  investment  interest),  the fact  lithotripsy  is a therapeutic
          treatment  the need of which can be  objectively  determined,  and the
          existence in the General  Partner's view of valid business  reasons to
          engage  in this  transaction,  form the  basis in part of the  General
          Partner's  belief  that this  Offering  is in  compliance  with  legal
          requirements.

          The  General  Partner  of the  Partnership  intends  for all  business
          activities  and  operations  of  the  Partnership  to  conform  in all
          respects  with  all  applicable  anti-kickback  statutes  (federal  or
          state).  The General  Partner does not believe that the  Partnership's
          contemplated    operations   violate   the   Anti-Kickback    Statute.
          Consequently,  the  General  Partner  does  not  believe  that  strict
          compliance  with a Safe Harbor is  necessary  for its  operations.  No
          assurance can be given,  however,  that the proposed activities of the
          Partnership   will  not  be  reviewed  and  challenged  by  regulatory
          authorities empowered to do so, or that if challenged, the Partnership
          will prevail.

          If the activities of the Partnership  were determined to violate these
          provisions,  the  Partnership,   the  General  Partner,  officers  and
          directors of the General  Partner,  and each Limited  Partner could be
          subject,  individually,  to  substantial  monetary  liability,  felony
          prison  sentences  and/or  exclusion from  participation  in Medicare,
          Medicaid  and  CHAMPUS.  For the  reasons  outlined  above,  it is the
          opinion of the General  Partner that the operations of the Partnership
          will not violate the  Anti-Kickback  Statute.  A  prospective  Limited
          Partner with  questions  concerning  these matters  should seek advice
          from his or her independent counsel.

          False Claims Statutes.  The Partnership is also subject to federal and
          state laws governing the submission of claims for reimbursement. These
          laws  generally  prohibit an individual  or entity from  knowingly and
          willfully  presenting a claim (or causing a claim to be presented) for
          payment  from  Medicare,  Medicaid or other third party payors that is
          false or fraudulent.  The standard for "knowing and willful"  includes
          conduct  that  amounts to a reckless  disregard  for whether  accurate
          information is presented by claims  processors.  Penalties under these
          statutes include substantial civil and criminal fines,  exclusion from
          the Medicare  program and  imprisonment.  One of the most prominent of
          these laws is the federal  False Claims Act,  which may be enforced by
          the federal government directly,  or by a qui tam private plaintiff on
          the government's  behalf. Under the federal False Claims Act, both the
          government and the private plaintiff, if successful,  are permitted to
          recover  substantial  monetary penalties and judgments,  as well as an
          amount equal to three times actual damages.  In recent cases, some qui
          tam  plaintiffs  have  taken  the  position  that  violations  of  the
          Anti-Kickback  provisions  (discussed  above) and Stark II  (discussed
          above)  should also be  prosecuted  as violations of the federal False
          Claims Act. The Partnership  cannot assure that the  government,  upon
          audit or review,  would not take the  position  that  billing  errors,
          employee  misconduct or violations of other federal  statutes,  should
          they occur,  are violations of the federal False Claims Act or similar
          statutes.

          New  Legislation.  The  General  Partner  is not  aware  of  any  bill
          currently  before  Congress  which, if enacted into law, would have an
          adverse effect on the Partnership's operations in a fashion similar to
          the Stark II and the Anti-Kickback  laws discussed above. In the event
          that

                                                        37
<PAGE>

          legislation  adversely  affecting the  operation of the  Partnership's
          business  is  enacted,  the  General  Partner is  obligated  either to
          purchase the  Investment  Interests of all the Limited  Partners or to
          dissolve the Partnership.  See "Summary of the Partnership Agreement -
          Optional Purchase of Investment Interests."

          FTC  Investigation.  Issues  relating to  physician-owned  health care
          facilities  have been  investigated  by the Federal  Trade  Commission
          ("FTC"),  which  investigated  two  lithotripsy  limited  partnerships
          affiliated with the General Partner,  to determine  whether they posed
          an  unreasonable  threat to competition in the health care field.  The
          General Partner and the limited partnerships were advised in 1996 that
          the FTC's investigation was terminated without any formal action taken
          by the FTC or any  restrictions  being placed on the activities of the
          limited partnerships.  However, the General Partner cannot assure that
          the FTC will  not  investigate  issues  arising  from  physician-owned
          health  care  facilities  in the future  with  respect to the  General
          Partner or any entity in which it is the General Partner.

          Ethical  Considerations.  The American Medical  Association's  Code of
          Medical  Ethics states that  physicians  should not refer  patients to
          facilities  in which  they  have an  ownership  interest  unless  such
          physician  directly  provides  care or services to such patient at the
          facility.  Because physician  investors will be providing  lithotripsy
          services,  the  General  Partner  believes  that  an  investment  by a
          physician   will  not  be  in  violation   of  the  American   Medical
          Association's  Code of Medical Ethics.  In the event that the American
          Medical   Association  changes  its  ethical  code  to  preclude  such
          referrals by physicians and such ethical  requirements  are applied to
          facilities or services  which,  at the time of adoption,  are owned in
          whole or in part by  referring  physicians,  the  Partnership  and the
          interests of the Limited Partners may be adversely affected.

State Regulation

          In Arkansas,  there is no  certificate of need  requirement  for major
          medical  equipment or mobile health services.  Hospitals which wish to
          establish  a new  health  service  must give  notice to and obtain the
          prior  approval  of  the  Health  Facility  Services  Division  before
          instituting the new service.  The Division's review determines whether
          the hospital has adequate  policies and  procedures in place to handle
          the  service.  X-ray  machines  must  be  registered  with  the  state
          Radiation Control Division.

          The Partnership will seek to comply with all applicable  statutory and
          regulatory  requirements.   Further  regulations  may  be  imposed  in
          Arkansas  at any  time in the  future.  Predictions  as to the form or
          content of such  potential  regulations  would be highly  speculative.
          They could apply to the operation of the Mobile  Lithotripsy System or
          to the  physicians  who invest in the  Partnership.  Such  restrictive
          regulations  could  materially  adversely  affect  the  ability of the
          Partnership to conduct its business.

          THE GENERAL PARTNER AND THE PARTNERSHIP BELIEVE  LITHOTRIPSY  SERVICES
          WILL CONTINUE TO BE SUBJECT TO INTENSE

                                                        38
<PAGE>

          GOVERNMENTAL   REGULATION   AT  THE  FEDERAL  AND  STATE  LEVELS  AND,
          THEREFORE, CANNOT PREDICT THE SCOPE AND EFFECT THEREOF.

          PROSPECTIVE  LIMITED  PARTNERS SHOULD CONSULT WITH THEIR LEGAL COUNSEL
          AS TO THE  IMPLICATIONS  OF FEDERAL  AND STATE  LAWS AND  PROFESSIONAL
          ETHICAL CODES DEALING WITH  PHYSICIAN  OWNERSHIP OF MEDICAL  EQUIPMENT
          AND FACILITIES BEFORE PURCHASING UNITS.


                                                 PRIOR ACTIVITIES

          Prime, the sole shareholder of the General Partner, is the largest and
          fastest growing provider of lithotripsy services in the United States,
          providing  lithotripsy  services at  approximately  400  hospitals and
          surgery  centers  in 34  states,  as  well as  delivering  non-medical
          services  related to the  operation  of the  lithotripters,  including
          scheduling,   staffing,  training,  quality  assurance,   maintenance,
          regulatory  compliance  and  contracting  with payors,  hospitals  and
          surgery  centers,   while  medical  care  is  rendered  by  urologists
          utilizing  the  lithotripters.  Prime has an  economic  interest in 56
          mobile  and six  fixed  site  lithotripters,  all but two of which are
          operated by Prime or the General  Partner  and its  Affiliates.  Prime
          began providing  lithotripsy  services with an acquisition in 1992 and
          has grown rapidly since that time through a total of ten  acquisitions
          with interests in 62 lithotripters.  In April 1996, Prime acquired the
          General  Partner.  The General Partner  operates over 30 lithotripters
          serving  approximately 200 locations in 19 states.  The acquisition of
          the  General  Partner  provided  Prime with  complementary  geographic
          coverage  as well as  additional  expertise  in forming  and  managing
          lithotripsy operations.  Prime and the General Partner's lithotripters
          together performed  approximately 31,000, or approximately 17%, of the
          estimated  180,000  lithotripsy  procedures  performed  in the  United
          States in 1995.  Approximately 1,850 urologists utilized Prime and the
          General Partner's  lithotripters in 1995,  representing  approximately
          25% of the estimated 7,300 active urologists in the United States.

          Prime  manages  the   operations  of   approximately   60  of  its  62
          lithotripters.  All of its  lithotripters  are operated in  connection
          with hospitals or surgery centers. Prime operates its lithotripters as
          the general partner of a limited  partnership or through a subsidiary,
          as is the case with the General Partner affiliated partnerships. Prime
          provides  a full range of  management  and other  non-medical  support
          services to the lithotripsy operations, while medical care is provided
          by urologists  utilizing the  facilities and certain  medical  support
          services are provided by the  hospital or surgery  center.  Urologists
          are investors in 33 of its 40 operations.

          Prime's lithotripters range in age from one to twelve years. Of its 62
          lithotripters,  56 are mobile  units  mounted in  tractor-trailers  or
          self-contained  coaches  serving  locations  in 34 states.  Prime also
          operates six fixed site  lithotripters in five states.  All of Prime's
          fixed lithotripsy units are located and operated in conjunction with a
          hospital  or  surgery  center.  Most of these  locations  are in major
          metropolitan   markets  where  the  population  can  support  such  an
          operation.  Fixed site lithotripters  generally cannot be economically
          justified in other locations.

                                                        39
<PAGE>

          Prime and the General  Partner  believe  that they  maintain  the most
          comprehensive  quality outcomes database and information system in the
          lithotripsy services industry.  Prime has detailed information on over
          100,000  procedures  covering  patient  demographic   information  and
          medical  condition  prior to  treatment,  the clinical  and  technical
          parameters of the procedure and  resulting  outcomes.  Information  is
          collected  before,  during and up to three months after the  procedure
          through  internal data  collection by doctors,  nurses and technicians
          and through patient questionnaires.

          For numerous reasons,  including  differences in financial  structure,
          program size,  economic  conditions  and  distribution  policies,  the
          success of the General  Partner's  Affiliates in the lithotripsy field
          should  not be  considered  as  indicative  of the  operating  results
          obtainable by the Partnership.

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                                                        40
<PAGE>

                        SOURCES AND APPLICATIONS OF FUNDS

          The following  table sets forth the funds  expected to be available to
          the Partnership  from this Offering if all 20 Units are sold and other
          sources and their anticipated and estimated uses.

                        Sources of Funds   Sale of 20 Units
Offering Proceeds(1)                         $322,220               (100.00%)
   TOTAL SOURCES                             $322,220               (100.00%)
                      Application of Funds
Reconditioning of Two Coaches(2)             $100,000              (  31.03%)
Loaner Rental Costs(2)                       $140,000              (  43.45%)
Reserves(3)                                  $ 44,720              (  13.88%)
Syndication Costs(4)                         $ 37,500              (  11.64%)
   TOTAL APPLICATIONS                        $322,220               (100.00%)


Notes to Sources and Applications of Funds Table

          (1) Assumes all 20 Units are purchased by qualified Investors.

          (2)  It is  anticipated  that  the  General  Partner  will  cause  the
          Partnership  to  contract  with AK  Associates,  an  Affiliate  of the
          General Partner,  to recondition each of the Partnership's  Coaches at
          an estimated cost of $50,000 per Coach.  During the time each Coach is
          reconditioned  (estimated at 6 - 8 weeks),  it is anticipated that the
          Partnership  will rent from the General  Partner or its  Affiliates  a
          "loaner" Mobile  Lithotripsy  System at an estimated per month cost of
          $35,000.  The  table  assumes  that each  refurbishment  will take two
          months.   See   "Business   Activities   -   Anticipated   Partnership
          Expenditures."  The  proceeds of this  Offering  cannot be  calculated
          until the number of Units sold has been determined at the Closing.  To
          the extent the proceeds of the Offering are  insufficient  to fund the
          costs described ABOVE, or such costs exceed the estimated amounts,  it
          is anticipated  that Partnership Cash Flow and/or the proceeds of debt
          financing will fund such costs. There is no assurance that Partnership
          Cash Flow or debt  financing  will be available for such purpose.  See
          "Risk Factors - Operating  Risks - Partnership  Limited  Resources and
          Risks of Leverage."

          (3) This amount  includes the General  Partner's  estimate of reserves
          for  unanticipated  time  overruns  in  scheduled   reconditioning  or
          unanticipated expenses in connection with the reconditioning.
 


                                                        41
<PAGE>

          (4)  Includes  $5,000  in  commissions  payable  to the  Sales  Agent,
          reimbursement of $7,500 to the Sales Agent for out-of-pocket  expenses
          incurred  in selling  the Units and  $25,000  in legal and  accounting
          costs associated with the preparation of this Memorandum.

                     FINANCIAL CONDITION OF THE PARTNERSHIP

          Set  forth on the  following  pages are the  Partnership's  internally
          prepared  accrual  based (i)  Income  Statements  for the years  ended
          December 31, 1995,  December 31, 1996,  December 31,  1997 and for the
          period ended  September 30, 1998,  (ii) Balance  Sheets as of December
          31, 1996,  December 31, 1997 and as of September 30, 1998,  (iii) Cash
          Flow  Statements  for the year ended  December 31, 1995,  December 31,
          1996,  December 31, 1997 and for the period ended  September  30, 1998
          and (iv)  Statements of Partner's  Equity for the years ended December
          31,  1995,  December 31,  1996,  December 31,  1997 and for the period
          ended September 30, 1998.

          Past  financial  performance is not  necessarily  indicative of future
          performance.  There is no assurance that the Partnership  will be able
          to maintain its current revenues or earnings.


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                                                        42
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                                                        43
<PAGE>




                                                        44
<PAGE>




                                                        45
<PAGE>




                                                        46
<PAGE>

                           MANAGEMENT'S DISCUSSION AND
                      ANALYSIS OF THE RESULTS OF OPERATIONS

Nine Months Ended September 30, 1998 and September 30, 1997

          Revenues.  Total revenues decreased $515,000 (18%) for the nine months
          ended  September  30, 1998 compared to the same period in 1997 related
          to a 8% decline in the number of procedures  performed,  primarily due
          to  the  loss  of  two  contracts,  that  had  generated  9% of  total
          procedures for the nine months ended  September 30, 1997. In addition,
          two hospitals,  that provided  approximately  20% of the procedures in
          both periods,  renegotiated their contracts resulting in a 24% decline
          in revenue per case in the 1998 period.  In addition,  the partnership
          experienced a decline in revenue per case.

          Operating  Expenses.  Operating  expenses declined by $95,000 (8%) for
          the nine months ended  September  30, 1998 compared to the same period
          in 1997,  due to a decline in  management  fees of $40,000  related to
          lower cash flow  generated  by the lower  revenues  amounts  discussed
          above. In addition, equipment maintenance and repairs declined $30,000
          related  to the  renegotiation  of the  equipment  service  agreement.
          Overhead  allocation  declined  $22,000  due to a decline in  expenses
          allocated by the General Partner related to cost containment  programs
          enacted and fewer procedures performed.

          Other Income (Expense). Total other income (expense), net increased by
          $400 (3%) due to the slight increase in interest income.

Year Ended December 31, 1997 and December 31, 1996

          Revenues.  Total revenues  decreased  $308,000 (8%) for the year ended
          December 31, 1997  compared to the same period in 1996 related to a 4%
          decline in the number of procedures performed, and a slight decline in
          revenue per case.

          Operating  Expenses.  Operating expenses decreased by $79,000 (5%) for
          the year ended  December 31, 1997  compared to the same period in 1996
          due to an  decrease  of  $53,000  in the  overhead  allocation  by the
          General Partner due to fewer procedures performed. In addition,  other
          operating expenses declined $32,000 due to fewer procedures performed.
        
          Other Income (Expense). Total other income (expense), net increased by
          $178,000  (116%) due to the partnership  recognizing its  proportional
          share of the loss on  disposal  of the  Louisiana-Arkansas  JV unit in
          1996, that did not repeat in 1997.

Year Ended December 31, 1996 and December 31, 1995

          Revenues.  Total revenues  increased $490,000 (14%) for the year ended
          December 31, 1996 compared to the same period in 1995,  related to the
          addition of a second lithotripter in early 1996


                                                        47
<PAGE>

          Operating Expenses. Operating expenses increased by $147,000 (10%) for
          the year ended  December 31, 1996 compared to the same period in 1995,
          due to an  increase  of  $108,000  in the  employee  compensation  and
          benefits  related to the addition of a second crew to staff the second
          lithotripter  added in early 1996. In addition,  management  fees rose
          $54,000  due  to  higher  cash  flows  generated  by  higher  revenues
          collected as compared to the prior year.

          Other Income  (Expense).   Other  income  (expense),  net decreased by
          $176,000  (794%) due to the partnership  recognizing its  proportional
          share of the loss on the disposal of the Louisiana-Arkansas JV unit in
          1996.


                      SUMMARY OF THE PARTNERSHIP AGREEMENT

          The  Partnership  Agreement  sets forth the powers and purposes of the
          Partnership  and the respective  rights and obligations of the General
          Partner and the Limited  Partners.  The following is only a summary of
          certain provisions of the Partnership Agreement,  and does not purport
          to be a complete  statement of the various rights and  obligations set
          forth  therein.  A complete copy of the  Partnership  Agreement is set
          forth as Appendix A to this  Memorandum,  and  Investors  are urged to
          read the  Partnership  Agreement in its entirety and to review it with
          their counsel and advisors.

Nature of Limited Partnership Interest

          The Investors will acquire their  interests in the  Partnership in the
          form of Units.  For each Unit purchased,  a cash payment of $16,111 is
          required.  The  entire  Unit  purchase  price  is  due  in  cash  upon
          subscription;  however,  certain  qualified  Investors  may  finance a
          portion of the purchase  price  through  Limited  Partner  Loans.  See
          "Terms  of the  Offering  - Limited  Partnership  Loans."  No  Limited
          Partner will have any liability for the debts and  obligations  of the
          Partnership by reason of being a Limited  Partner except to the extent
          of (i) his or her Capital  Contribution  and liability under a Limited
          Partner  Loan,  if any,  (ii)  his or her  proportionate  share of the
          undistributed profits of the Partnership,  and (iii) the amount of any
          Distribution  received  from  the  Partnership  at  a  time  when  its
          liabilities  exceed the fair value of its  assets as  provided  by the
          Act. See "Risk Factors - Other  Investment  Risks - Limited  Partners'
          Obligation to Return  Certain  Distributions."  See also Form of Legal
          Opinion of Womble Carlyle  Sandridge & Rice,  PLLC attached  hereto as
          Appendix C.

Profits, Losses and Distributions

          The following is a Summary of certain  provisions  of the  Partnership
          Agreement  relating to the allocation and distribution of the Profits,
          Losses,  Partnership  Cash  Flow,  Partnership  Refinancing  Proceeds,
          Partnership   Sales  Proceeds,   and  cash  upon  dissolution  of  the
          Partnership.  Because an understanding of the defined  financial terms
          is essential to an  evaluation  of the  information  presented  below,
          Investors  should  carefully  review  the  definitions  of  the  terms
          appearing in the Glossary.


                                                        48
<PAGE>

                  1.          Allocations of Profits and Losses.

          (a) General.  Generally,  Profits and Losses, if any, for each Year of
          the Partnership will be allocated  proportionately  among the Partners
          based on their  respective  Percentage  Interests in the  Partnership;
          provided that New Limited  Partners will be allocated only Profits and
          Losses  that  accrue  after  the  date  of  their   admission  to  the
          Partnership as Limited Partners.

          (b)  Allocations.  Profits and Losses  allocated  to a Partner will be
          allocated  at the end of the Year of the  Partnership,  and each  such
          Partner  will  receive his pro rata share of Profits and Losses  based
          upon the number of days such  Partner was a member of the  Partnership
          during the Year of the Partnership. Notwithstanding the foregoing, the
          Partnership's  "allocable  cash basis  items," as that term is used in
          Section  706(d)(2)(B)  of the Code,  will be  allocated as required by
          Section  706(d)(2)  of  the  Code  and  the  regulations   promulgated
          thereunder.

          (c)  Qualified  Income  Offset.  If any Limited  Partner  unexpectedly
          receives an  adjustment,  allocation or  distribution  as described in
          Treasury Regulation Section 1.704- 1(b)(2)(ii)(d)(4)  through (6) that
          causes such Limited Partner to have a deficit Capital Account balance,
          such Limited  Partner will be allocated items of income and gain in an
          amount and manner  sufficient  to eliminate  such  deficit  balance as
          quickly as  possible.  This  provision  is intended to be a "qualified
          income offset" as defined in Regulation Section 1.704-1(b)(2)(ii)(d).
          
        2.          Distributions.

          (a) Non-liquidation Distributions. Partnership Cash Flow for each Year
          of the  Partnership,  to the  extent  available,  will be  distributed
          within  60 days  after  the end of each  Year of the  Partnership,  or
          earlier in the  discretion  of the  General  Partner,  proportionately
          among the Partners based on their respective  Percentage  Interests in
          the  Partnership  at  the  time  of  distribution.  Partnership  Sales
          Proceeds and  Partnership  Refinancing  Proceeds  will be  distributed
          within  60  days  of the  capital  transaction  giving  rise  to  such
          proceeds,  or  earlier  in  the  discretion  of the  General  Partner,
          proportionately   among  the  Partners   based  on  their   respective
          Percentage Interests in the Partnership. The New Limited Partners have
          no rights to receive any distributions in the future that are made out
          of the Initial  Limited  Partners' and General  Partner's  accrued but
          undistributed  Partnership  Cash  Flow as of the date the New  Limited
          Partners are admitted to the Partnership. New Limited Partners will be
          entitled only to Partnership  Cash Flow that accrues after the date of
          their admission to the Partnership as Limited Partners

          (b)   Distribution   Upon   Dissolution.   Upon  the  dissolution  and
          termination of the  Partnership,  the General  Partner or, if there is
          none, a  representative  of the Limited  Partners,  will liquidate the
          assets of the  Partnership.  The proceeds of such  liquidation will be
          applied and distributed in the following order of priority: (a) First,
          to the payment of the debts and  liabilities of the  Partnership,  and
          the  expenses  of  liquidation;  (b)  Second,  to the  creation of any
          reserves  which  the  General  Partner  or the  representative  of the
          Limited Partners may deem reasonably  necessary for the payment of any
          contingent or unforeseen liabilities or obligations of the Partnership
          or of the General  Partner  arising out of or in  connection  with the
          business and operation of the Partnership;

                                          49
<PAGE>

          and (c)  Third,  the  balance,  if any,  will  be  distributed  to the
          Partners in accordance  with the Partners'  positive  capital  account
          balances.   Any  General  Partner  with  a  negative  capital  account
          following the distribution of liquidation  proceeds or the liquidation
          of its interest must  contribute to the Partnership an amount equal to
          such   negative   capital   account  on  or  before  the  end  of  the
          Partnership's taxable year (or, if later, within ninety days after the
          date  of  liquidation).  Any  capital  so  contributed  shall  be  (i)
          distributed  to those  Partners with positive  capital  accounts until
          such  capital  accounts  are  reduced  to zero,  and/or  (ii)  used to
          discharge recourse liabilities.

Management of the Partnership

          The  General  has  the  sole  right  to  manage  the  business  of the
          Partnership   and  at  all  times  is   required   to   exercise   its
          responsibilities in a fiduciary  capacity.  The consent of the Limited
          Partners is not  required  for any sale or  refinancing  of the Mobile
          Lithotripsy  Systems,  the purchase of additional  Mobile  Lithotripsy
          Systems  or the  purchase  of other  new  equipment  or  assets by the
          Partnership.  The General Partner will oversee the day-to-day  affairs
          of the Partnership pursuant to the Management Agreement. See "Business
          Activities - Management."

          Under the Partnership Agreement, if the General Partner is adjudged by
          a court of competent jurisdiction to be liable to the Limited Partners
          or the Partnership for acts of gross negligence or willful  misconduct
          in the  performance  of its duties under the terms of the  Partnership
          Agreement,  the General Partner may be removed and another substituted
          with the consent of all of the Limited  Partners.  The General Partner
          may transfer all or a portion of its Partnership  Interest only if, in
          the opinion of the Partnership's  accountant,  the new general partner
          has sufficient net worth and meets other  requirements  to assure that
          the  Partnership  will  continue  to be treated as a  partnership  for
          Federal tax purposes.  Both the admission of any new  shareholder  and
          the withdrawal of any shareholder from the General Partner may be done
          without the approval of the Limited Partners.

Powers of the General Partner

                  1.          General.

          The General  Partner may, in its absolute  discretion,  borrow  money,
          acquire,  encumber,  hold title to, pledge, sell, release or otherwise
          dispose of, all or any part of the Partnership's assets, when and upon
          such terms as it  determines  to be in the best  interest  of the Part
          nership  and  employ  such  persons  as it  deems  necessary  for  the
          operation  of  the  Partnership.  The  General  Partner,  however,  is
          expressly   prohibited  from,   among  other  things:   (i) possessing
          Partnership  assets or  assigning  the  rights of the  Partnership  in
          Partnership  assets,  including the Mobile  Lithotripsy  Systems,  for
          other  than  Partnership  purposes;  (ii) admitting  Limited  Partners
          except as provided in the Partnership Agreement;  and (iii) performing
          any act (other than an act  required by the  Partnership  Agreement or
          any act taken in good faith  reliance upon  Counsel's  opinion)  which
          would,  at the time such act occurred,  subject any Limited Partner to
          liability as a general partner in any jurisdiction.

                                                        50
<PAGE>

                  2.          Tax Matters.

          (i) Elections. The General Partner will, in its sole discretion,  make
          for the Partnership any and all elections for federal, state and local
          tax purposes including, without limitation, any election, if permitted
          by applicable law, to adjust the basis of the  Partnership's  property
          pursuant  to Code  Sections  754,  734(b) and  743(b),  or  comparable
          provisions  of state or local law, in  connection  with  transfers  of
          interests in the Partnership and Partnership Distributions.

          (ii) Tax Matters  Partner.  The Partnership  Agreement  designates the
          General Partner as the Tax Matters Partner (as defined in Section 6231
          of the Code) and  authorizes it to act in any similar  capacity  under
          state or local law. As the Tax Matters Partner, the General Partner is
          authorized  (at  the  Partnership's  expense):  (i) to  represent  the
          Partnership  and  Partners  before  taxing  authorities  or  courts of
          competent  jurisdiction  in tax matters  affecting the  Partnership or
          Partners in their capacity as Partners;  (ii) to extend the statute of
          limitations for assessment of tax  deficiencies  against Partners with
          respect to adjustments to the  Partnership's  federal,  state or local
          tax  returns;  (iii) to  execute  any  agreements  or other  documents
          relating to or affecting  such tax matters,  including  agreements  or
          other  documents  that  bind the  Partners  with  respect  to such tax
          matters  or  otherwise  affect  the  rights  of  the  Partnership  and
          Partners;  and  (iv) to  expend  Partnership  funds  for  professional
          services  and  costs  associated  therewith.  In its  capacity  as Tax
          Matters Partner, the General Partner shall oversee the Partnership tax
          affairs  in  the  manner  which,  in  its  best  judgment,  are in the
          interests of the Partners.  Moreover, the General Partner will, in its
          sole discretion,  not make an election pursuant to Treasury Regulation
          301.7701.3 to be treated as an association taxable as a corporation.

Rights and Liabilities of the Limited Partners

          The  Limited  Partners  do not have any  right to  participate  in the
          management  of the business of the  Partnership  and will not transact
          business  for the  Partnership.  Limited  Partners are not required to
          make any  capital  contributions  to the  Partnership  except  amounts
          agreed by them to be paid,  or pay or be  personally  liable for,  any
          expense,  liability or  obligation of the  Partnership,  except to the
          extent  (i) his or her  Capital  Contribution  and  liability  under a
          Limited Partner Loan, if any, (ii) his or her  proportionate  share of
          the undistributed profits of the Partnership,  and (iii) the amount of
          any  Distribution  received  from the  Partnership  at a time when its
          liabilities  exceed the fair value of its  assets as  provided  by the
          Act.  See  "Risk  Factors  - Limited  Partners  Obligations  to Return
          Certain Distributions."

          The Limited  Partners may not participate in or own an interest in any
          competing lithotripsy venture, except with the approval of the General
          Partner.  The  General  Partner  may elect to treat  participation  or
          ownership by a Limited  Partner in a competing  venture as an event of
          default,  and  such  Limited  Partner  may be  required  to  sell  his
          Partnership  Interest.  See  "Optional  Purchase  of  Limited  Partner
          Interests" below.


                                                        51
<PAGE>

Restrictions on Transfer of Partnership Interests

          After acquisition of Units by Investors,  no Partnership  Interest nor
          any Units may be transferred  without the prior written consent of the
          General  Partner,  which approval may be granted or denied in the sole
          discretion of the General Partner,  and subject to the satisfaction of
          certain other conditions set forth in the Partnership  Agreement.  The
          Partnership  Agreement  contains  additional  limitations on transfer,
          including  provisions   prohibiting  transfer  that  would  cause  the
          termination  of  the  Partnership,  would  violate  federal  or  state
          securities  laws, would prevent the Partnership from being entitled to
          use any method of depreciation  which the Partnership  might otherwise
          be  entitled  to use,  or would  adversely  affect  the  status of the
          Partnership  as a  partnership  for Federal  income tax  purposes.  In
          addition,  the Partnership Agreement prohibits the holding or transfer
          of a Partnership  interest by or to a "tax exempt  entity" (as defined
          in Code  Section  168(h))  which would  affect the method or manner in
          which the Partnership may depreciate Partnership assets. No transferee
          of the Units will automatically become a Limited Partner. Admission of
          a transferee  to the  Partnership  as a Limited  Partner  requires the
          fulfillment  of  other  obligations   enumerated  in  the  Partnership
          Agreement,  including  either the approval of all the Limited Partners
          (except the assignor Limited Partner) and the General Partner,  or the
          approval of the assignor Limited Partner and the General Partner.  Any
          transferee of a Partnership  Interest who has not been admitted to the
          Partnership  as a Partner  shall not be entitled to any of the rights,
          powers or privileges of his transferor except the right to receive and
          be credited or debited  with his  proportionate  share of  Partnership
          income, gains, profits, losses, deductions,  credits or distributions.
          A  transferor  Limited  Partner  will not be released  from his or her
          personal  liability under the Limited Partner Loans,  unless otherwise
          specifically agreed by the Bank.

Dissolution and Liquidation

          The  Partnership  will dissolve and terminate for any of the following
          reasons:

          1. The sale,  exchange or disposition of all or  substantially  all of
          the  property of the  Partnership  without  making  provision  for the
          replacement thereof;

          2. The expiration of its term on December 31, 2040;

          3. The  bankruptcy  or occurrence of certain other events with respect
          to the General Partner;

          4. The  election  to  dissolve  the  Partnership  made by the  General
          Partner and a Majority in Interest of the Limited Partners; or

          5. For any other  reason which under the laws of the State of Arkansas
          would cause a dissolution.

          The retirement, resignation, bankruptcy, assignment for the benefit of
          creditors,  dissolution,  death,  disability or legal  incapacity of a
          general partner will not, however, result in a

                                                        52
<PAGE>

          termination  of the  Partnership if the remaining  general  partner or
          general  partners,  if any,  elect to  continue  the  business  of the
          Partnership,  or if no general partner  remains,  if within 90 days of
          the  occurrence  of one of such  events,  all of the Limited  Partners
          elect in  writing to  continue  the  Partnership  and,  if  necessary,
          designate a new general partner.

          Upon  dissolution,  the  General  Partner  or,  if there  is  none,  a
          representative   of  the  Limited   Partners,   will   liquidate   the
          Partnership's assets and distribute the proceeds thereof in accordance
          with the  priorities  set  forth  in the  Partnership  Agreement.  See
          "Profits, Losses and Distributions - Distributions - Distribution upon
          Dissolution"   above  and  "Optional   Purchase  of  Limited   Partner
          Interests" below.

Optional Purchase of Limited Partner Interests

          As provided in the Partnership Agreement,  the General Partner and the
          Limited  Partners  have an option to  purchase  all the  interest of a
          Limited Partner in the Partnership upon the occurrence with respect to
          the Limited Partner of (i) death, (ii) bankruptcy or insolvency, (iii)
          incompetency, or (iv) direct or indirect ownership of an interest in a
          competing venture. Upon the occurrence of one or more of the preceding
          events,  the  withdrawing  Limited  Partner,  or his  or her  personal
          representative,  will have a brief period  within which to sell his or
          her entire  Partnership  Interest  to a  purchaser  approved of by the
          General Partner.  If the withdrawing Limited Partner is unable to sell
          his or her Partnership Interest as provided above, the General Partner
          will then have the first option to purchase such Partnership  Interest
          and thereafter, the remaining Limited Partners will have the option to
          purchase any of the Partnership  Interest not purchased by the General
          Partner.  If the General Partner or Limited Partners elect to exercise
          their respective  options,  the option purchase price will be equal to
          the  withdrawing  Limited  Partner's share of the  Partnership's  book
          value, if any, as reflected by such Limited  Partner's capital account
          in the  Partnership  (unadjusted  for any  appreciation in Partnership
          assets  and as  reduced  by  depreciation  deductions  claimed  by the
          Partnership for tax purposes).  The  withdrawing  Limited Partner will
          not be released from his  obligations  under any Limited  Partner Loan
          unless so agreed by the Bank. Furthermore,  sale of his or her Limited
          Partnership  Interest  may  constitute  an event of default  under the
          Limited Partner Loan, if any. See "Terms of Offering - Limited Partner
          Loans." There can be no assurance that the option  purchase price will
          represent the fair market value of a Limited Partner's interest in the
          Partnership.  Because Partnership losses,  depreciation deductions and
          Distributions  reduce capital  accounts,  and because  appreciation in
          Partnership  assets is not  reflected in capital  accounts,  it is the
          opinion of the General  Partner that the option purchase price will be
          nominal in amount.

Dilution Offerings

          The General Partner has the authority to  periodically  offer and sell
          additional limited  partnership  interests in the Partnership  through
          Dilution  Offerings to local  urologists  who are not investors in the
          Partnership ("Qualified  Investors").  The primary purpose of Dilution
          Offerings would be (i) to raise additional  capital for any legitimate
          Partnership  purpose and (ii) to assure the highest quality of patient
          care by admitting Qualified Investors to the Partnership who will be

                                                        53
<PAGE>

          dedicated  and  motivated  as  owners  to  follow  the   Partnership's
          treatment protocol,  and comply with its quality assurance and outcome
          analysis programs.

          Any sale of limited partnership  interests in a Dilution Offering will
          result  in  proportionate   dilution  of  the  Partnership  Percentage
          Interests of the existing Partners; i.e., the interests of the General
          Partner and of the Limited Partners in Partnership  allocations,  cash
          distributions and voting rights will be  proportionately  reduced as a
          result of a successful Dilution Offering.  The Percentage Interests of
          the General  Partner and the Initial  Limited  Partners,  as in effect
          prior to this Offering,  may not be diluted through Dilution Offerings
          (including  this  Offering) by more than 20% in the aggregate  without
          the  prior  written  consent  of a  Majority  in  Interest  of all the
          Partners.  Any additional limited  partnership  interests offered in a
          Dilution  Offering  will be sold for a price no lower  than their fair
          market  value  as  determined  by the  General  Partner,  in its  sole
          discretion, at the time of this Offering.

Arbitration

          The Partnership  Agreement  provides that disputes arising  thereunder
          shall  be  resolved  by  submission  to  arbitration  in  Arkansas  in
          accordance with the then prevailing  commercial  arbitration  rules of
          the American Arbitration Association.

Power of Attorney

          Each Investor,  by executing the Subscription  Agreement,  irrevocably
          appoints Dr. Joseph Jenkins and Dr. David Vela,  severally,  to act as
          attorneys-in-fact to execute the Partnership Agreement, any amendments
          thereto  and any  certificate  of  limited  partnership  filed  by the
          General  Partner.  The  Partnership   Agreement,   in  turn,  contains
          provisions  by which each  Limited  Partner  irrevocably  appoints Dr.
          Joseph  Jenkins,  to  act as his  or  her  attorney-in-fact  to  make,
          execute,  swear to and file any documents  necessary to the conduct of
          the  Partnership's  business,  such as deeds of  conveyance of real or
          personal  property  as  well  as  any  amendment  to  the  Partnership
          Agreement  or  to  any  certificate  of  limited   partnership   which
          accurately reflects actions properly taken by the Partners.

Reports to Limited Partners

          Within  90 days  after the end of each  Year of the  Partnership,  the
          General  Partner will send to each person who was a Limited Partner at
          any time during  such year such tax  information,  including,  without
          limitation,  Federal Tax Schedule K-1, as will be reasonably necessary
          for the  preparation  by such person of his federal income tax return,
          and such other financial information as may be required by the Act.

Records

          Proper and  complete  records and books of account will be kept by the
          General  Partner  in which will be entered  fully and  accurately  all
          transactions and other matters relative to the

                                                        54
<PAGE>

          Partnership's  business as are usually  entered into records and books
          of  account  maintained  by  persons  engaged  in  business  of a like
          character. The Partnership books and records will be kept according to
          the  method of  accounting  determined  by the  General  Partner.  The
          Partnership's  fiscal year will be the  calendar  year.  The books and
          records will be located at the office of the General Partner, and will
          be open to the reasonable  inspection  and  examination of the Limited
          Partners  or  their  duly  authorized  representatives  during  normal
          business hours.

                                                   LEGAL MATTERS

          Certain legal matters in connection with the Units offered hereby will
          be passed upon for the Partnership by Womble Carlyle Sandridge & Rice,
          a Professional  Limited Liability  Company,  of  Winston-Salem,  North
          Carolina.  See  "Conflicts of  Interest." On the Closing Date,  Womble
          Carlyle  Sandridge & Rice, a Professional  Limited  Liability  Company
          will render an opinion, the form of which is attached as Appendix C to
          this   Memorandum,   with  respect  to  certain   federal  income  tax
          consequences  of an  investment  in  Units.  See "Tax  Aspects  of the
          Offering."

                                                     GLOSSARY

          Certain terms in this Memorandum shall have the following meanings:

          Act. The Act means the Arkansas Revised Limited Partnership Act, as in
          effect on the date hereof.

          Affiliate.  An Affiliate is (i) any person,  partnership  corporation,
          association  or other legal entity  ("person")  directly or indirectly
          controlling,  controlled  by or  under  common  control  with  another
          person,  (ii) any  person  owning  or  controlling  10% or more of the
          outstanding voting interests of such other person,  (iii) any officer,
          director or partner of such person and (iv) if such other person is an
          officer, director or partner, any entity for which such person acts in
          such capacity.

          AK  Associates.  AK  Associates,  Inc., a subsidiary  of Prime.  It is
          anticipated  that the Partnership  will contract with AK Associates to
          recondition the Coaches with the proceeds of the Offering.

          Bank. First-Citizens Bank & Trust Company.

          Capital  Account.  The  Partnership  capital  account  of a Partner as
          computed pursuant to Article XII of the Partnership Agreement.

          Capital Contributions.  All capital contributions made by a Partner or
          his predecessor in interest which shall include,  without  limitation,
          contributions   made  pursuant  to  Article  VII  of  the  Partnership
          Agreement.


                                                        55
<PAGE>

          Capital  Transaction.  Any  transaction  which,  were  it to  generate
          proceeds,  would produce  Partnership  Sales  Proceeds or  Partnership
          Refinancing Proceeds.

          Closing  Date.  5:00 p.m.,  Central  Time,  on  December  30, 1998 (or
          earlier) in the  discretion of the General  Partner.  The Closing Date
          may be extended  for a period of up to 180 days in the  discretion  of
          the General Partner.

          Coaches.  The two self-propelled  mobile vehicles  manufactured by the
          Calumet Coach Company,  Calumet City, Illinois,  upfitted to house the
          LithostarsTM.

          Code. The Internal Revenue Code of 1986, or  corresponding  provisions
          of subsequent, superseding revenue laws.

          Contract Hospitals.  The 17 hospitals,  medical centers and ambulatory
          surgery centers to which the Partnership provides lithotripsy services
          pursuant to 17 separate Hospital Contracts.

          Counsel. Counsel to the Partnership,  Womble Carlyle Sandridge & Rice,
          a   Professional   Limited   Liability   Company,   P.O.   Drawer  84,
          Winston-Salem, North Carolina 27102.

          Dilution Offering. The issuance,  offering and sale by the Partnership
          of additional partnership interests in the future.

          Distributions. Cash or other property, from any source, distributed to
          Partners.

          Escrow Agent. First-Citizens Bank & Trust Company.

          FDA. The United States Food and Drug Administration.

          Financial Statement.  The Purchaser Financial  Statement,  included in
          the Subscription Packet accompanying this Memorandum,  to be furnished
          by the  Investors  for review by the  General  Partner and the Bank in
          connection with their decision to accept or reject a subscription.

          General   Partner.   The   general   partner   of   the   Partnership,
          Lithotripters,  Inc., a North Carolina corporation, and a wholly owned
          subsidiary of Prime Medical Services, Inc.

          Hospital Contracts.  The 17 separate  lithotripsy  services agreements
          the Partnership has entered into with the contract Hospitals.

          Initial Limited  Partners.  The Individuals who were Limited  Partners
          prior to the commencement of this Offering.

          Investors. Potential purchasers of Units.


                                                        56
<PAGE>

          Limited  Partner  Loan.  The  loan to be made by the  Bank to  certain
          qualified  Investors  that  wish to  finance  a  portion  of the  Unit
          purchase price.

          Limited Partner Note. The promissory note from an Investor financing a
          portion of the Unit purchase price to the Bank in the principal amount
          of $13,611 per Unit,  the  proceeds of which will be paid  directly to
          the  Partnership.  The form of the Limited Partner Note (including the
          Note Addendum  attached  thereto) is attached as Exhibit A to the Bank
          Commitment which is attached hereto as Appendix B.

          Limited  Partners.  The Limited  Partners  are those  Investors in the
          Units  admitted  to the  Partnership  and  any  person  admitted  as a
          substitute  Limited  Partner in accordance  with the provisions of the
          Partnership Agreement.

          LithostarTM.   The  two  LithostarTM  model extracorporeal shock  wave
          lithotripters manufactured by Siemens and owned by the Partnership.

          Loan  and  Security  Agreement.   The  agreement  to  be  executed  in
          conjunction  with the Limited Partner Note by an Investor who finances
          a portion of the Unit purchase  price through a Limited  Partner Loan.
          The form of the Loan and  Security  Agreement is attached as Exhibit B
          to the Bank Commitment which is attached hereto as Appendix B.

          Loan  Documents.  The Bank  Commitment,  the Limited Partner Note, the
          Loan  and  Security  Agreement,  the  Security  Agreement  and  UCC-1,
          collectively.

          Loss. The net loss  (including  capital losses and excluding Net Gains
          from  Capital  Transactions)  of the  Partnership  for  each  year  as
          determined by the Partnership for federal income tax purposes.

          Memorandum. This Confidential Private Placement Memorandum,  including
          all Appendices hereto, and any amendment or supplement hereto.

          Mobile  Lithotripsy  Systems.  The two Coaches with the  installed and
          operational LithostarsTM owned and operated by the Partnership.

          Net  Gains  from  Capital  Transactions.  The  gains  realized  by the
          Partnership as a result of or upon any sale, exchange, condemnation or
          other  disposition  of the capital  assets of the  Partnership  (which
          assets  shall  include  Code Section 1231 assets) or as a result of or
          upon the damage or destruction of such capital assets.

          New Limited  Partner.  Any Investor  admitted to the  Partnership as a
          Limited Partner.




                                                        57
<PAGE>

          Nonrecourse   Deductions.   A  deduction  as  set  forth  in  Treasury
          Regulations   Section   1.704-2(b)(1).   The  amount  of   Nonrecourse
          Deductions  for a given Year  equals the  excess,  if any,  of the net
          increase,  if any, in the amount of  Partnership  Minimum  Gain during
          such Year over the aggregate amount of any  Distributions  during such
          Year of proceeds of a Nonrecourse  Liability  that are allocable to an
          increase in  Partnership  Minimum  Gain,  determined  according to the
          provisions of Treasury Regulations Section 1.704-2(h).

          Nonrecourse Liability.  Any Partnership liability (or portion thereof)
          for which no Partner  bears the  "economic  risk of loss,"  within the
          meaning of Treasury Regulations Section 1.704-2(i).

          Offering. The offering of Units pursuant to this Memorandum.

          Partner  Minimum  Gain.  An  amount,  with  respect  to  each  Partner
          Nonrecourse  Debt,  equal to the  Partnership  Minimum Gain that would
          result if such Partner  Nonrecourse Debt were treated as a Nonrecourse
          Liability,  determined in accordance with Treasury Regulations Section
          1.704-2(i).

          Partner  Nonrecourse  Debt. Any nonrecourse  debt (for the purposes of
          Treasury  Regulations  Section  1.1001-2) of the Partnership for which
          any Partner bears the  "economic  risk of loss," within the meaning of
          Treasury Regulations Section 1.752-2.

          Partner  Nonrecourse  Deductions.  Deductions as described in Treasury
          Regulations Section  1.704-2(i)(2).  The amount of Partner Nonrecourse
          Deductions  with  respect to a Partner  Nonrecourse  Debt for any Year
          equals the excess, if any, of the net increase,  if any, in the amount
          of Partner Minimum Gain attributable to such Partner  Nonrecourse Debt
          during such Year over the aggregate amount of any Distributions during
          that Year to the Partner that bears the economic risk of loss for such
          Partner Nonrecourse Debt to the extent such Distributions are from the
          proceeds of such  Partner  Nonrecourse  Debt and are  allocable  to an
          increase  in  Partner  Minimum  Gain   attributable  to  such  Partner
          Nonrecourse Debt,  determined in accordance with Treasury  Regulations
          Section 1.704-2(i).

          Partners. The General Partner and the Limited Partners,  collectively,
          when no  distinction  is  required by the context in which the term is
          used herein.

          Partnership. Fayetteville Lithotripters Limited Partnership - Arkansas
          I, an Arkansas limited partnership.

          Partnership   Agreement.   The  Partnership's   Agreement  of  Limited
          Partnership,  the form of which is attached  hereto as Appendix A,  as
          the same may be amended from time to time.

          Partnership Cash Flow. For the applicable  period the excess,  if any,
          of (A) the sum of (i) all  gross  receipts  from any  source  for such
          period,  other than from Partnership loans,  Capital  Transactions and
          Capital Contributions,  and (ii) any funds released by the Partnership
          from

                                                        58
<PAGE>

          previously  established  reserves,  over  (B) the sum of (i) all  cash
          expenses paid by the Partnership  for such period,  (ii) the amount of
          all payments of principal on loans to the  Partnership,  (iii) capital
          expenditures of the Partnership,  and (iv) such reasonable reserves as
          the General  Partner shall deem  necessary or prudent to set aside for
          future repairs,  improvements,  or equipment replacement or additions,
          or to meet  working  capital  requirements  or foreseen or  unforeseen
          future  liabilities and  contingencies of the  Partnership;  provided,
          however, that the amounts referred to in (B) (i), (ii) and (iii) above
          shall be taken into  account  only to the extent not funded by Capital
          Contributions,  loans or paid out of previously  established reserves.
          Such term shall also  include all other  funds  deemed  available  for
          distribution and designated as "Partnership  Cash Flow" by the General
          Partner.

          Partnership Interest.  The interest of a Partner in the Partnership as
          defined by the Act and the Partnership Agreement.

          Partnership  Minimum  Gain.  Gain as defined in  Treasury  Regulations
          Section 1.704-2(d).

          Partnership   Refinancing   Proceeds.   The  cash  realized  from  the
          refinancing  of  Partnership  assets after  retirement  of any secured
          loans and less (i) payment of all expenses relating to the transaction
          and (ii)  establishment  of such  reasonable  reserves  as the General
          Partner  shall  deem  necessary  or  prudent  to set aside for  future
          repairs,  improvements,  or equipment replacement or additions,  or to
          meet working  capital  requirements  or foreseen or unforeseen  future
          liabilities or contingencies of the Partnership.

          Partnership Sales Proceeds. The cash realized from the sale, exchange,
          casualty  or other  disposition  of all or a  portion  of  Partnership
          assets  after the  retirement  of all  secured  loans and less (i) the
          payment  of  all  expenses   related  to  the   transaction  and  (ii)
          establishment of such reasonable reserves as the General Partner shall
          deem   necessary   or  prudent  to  set  aside  for  future   repairs,
          improvements,  or  equipment  replacement  or  additions,  or to  meet
          working  capital   requirements  or  foreseen  or  unforeseen   future
          liabilities or contingencies of the Partnership.

          Percentage Interest.  The interest of each Partner in the Partnership,
          to be  determined  in the case of each  Investor by  reference  to the
          percentage  opposite  his or her name set  forth in  Exhibit A  to the
          Partnership  Agreement.  Each  Unit  sold  pursuant  to this  offering
          represents an initial 1% economic  interest.  The Percentage  Interest
          will be set forth in  Exhibit A  to the  Partnership  Agreement or any
          other  document or agreement,  as a percentage or a fraction or on any
          numerical basis deemed appropriate by the General Partner.

          Prime.   Prime  Medical  Services,   Inc.  a  publicly  held  Delaware
          corporation and parent of the General  Partner,  AK Associates and the
          Sales Agent.

          Prime Rate. The rate of interest periodically  established by the Bank
          and identified as such in literature  published and circulated  within
          the Bank's offices.


                                                        59
<PAGE>

          Profit.  The net income of the Partnership for each year as determined
          by the Partnership for federal income tax purposes.

          Pro Rata Basis. In connection with an allocation or  distribution,  an
          allocation or distribution in proportion to the respective  Percentage
          Interest of the class of Partners to which reference is made.

          Qualified   Income   Offset  Item.   An   adjustment,   allocation  or
          distribution    described    in    Treasury    Regulations    Sections
          1.704-1(b)(2)(ii)(d)(4),     1.704-1(b)(2)(ii)(d)(5)     or     1.704-
          1(b)(2)(ii)(d)(6) unexpectedly received by a Partner.

          Sales Agent.  MedTech Investments,  Inc., a registered  broker-dealer,
          member of the National Association of Securities Dealers,  Inc. and an
          Affiliate  of certain  members  of the  General  Partner's  management
          personnel.

          SEC. The United States Securities and Exchange Commission.

          Securities Act. The Securities Act of 1933, as amended.

          Security  Agreement.  The agreement to be executed in conjunction with
          the Limited  Partner  Note by an Investor  who  finances  the purchase
          price  of his  Units as  provided  herein.  The  form of the  Security
          Agreement  is attached as Exhibit C  to the Bank  Commitment  which is
          attached hereto as Appendix B.

          Service. The Internal Revenue Service.

          Service Area. The state of Arkansas.

          Siemens. Siemens Medical Systems, Inc. and its Affiliates.

          Subscription Agreement.  The Subscription  Agreement,  included in the
          Subscription  Packet  accompanying this Memorandum,  to be executed by
          the Limited Partners in connection with their purchase of Units.

          Subscription  Packet.  The  packet  of  subscription  materials  to be
          completed by  Investors  in  connection  with their  subscription  for
          Units.

          UCC-1. The Uniform Commercial Code Financing Statement,  two copies of
          which are attached to the  Subscription  Packet and are to be executed
          in  conjunction  with the  Limited  Partner  Note by an  Investor  who
          finances  a  portion  of the Unit  purchase  price  through  a Limited
          Partner  Loan.  The  UCC-1  will be used by the  Bank to  perfect  its
          security interest in such Investor's share of Distributions.



                                                        60
<PAGE>

          Units.  The 20 equal  limited  partner  interests  in the  Partnership
          offered pursuant to this Memorandum for a price per Unit of $16,111 in
          cash.

          Year  of the  Partnership.  An  annual  accounting  period  ending  on
          December 31 of each year during the term of the Partnership.
                                             _________________________

                                         61
<PAGE>

                                                         
      Name of Prospective Investor                           Memorandum Number











                  TEXAS LITHOTRIPSY LIMITED PARTNERSHIP I L.P.


              A Limited Partnership Formed Under the Laws of Texas

                    CONFIDENTIAL PRIVATE PLACEMENT MEMORANDUM

                             up to $251,500 in Cash

                    20 Units of Limited Partnership Interest
                           at $12,575 in Cash per Unit





           THIS MEMORANDUM IS FURNISHED PURSUANT TO A CONFIDENTIALITY
         AGREEMENT BETWEEN THE PARTNERSHIP AND THE INVESTOR WHOSE NAME
           APPEARS ABOVE. THE CONFIDENTIALITY AGREEMENT PROHIBITS THE
           DISCLOSURE OF THE CONFIDENTIAL MATERIAL CONTAINED IN THIS
       MEMORANDUM, EXCEPT TO THE EXTENT SUCH INVESTOR DEEMS IT NECESSARY
         TO SHARE SUCH INFORMATION WITH HIS LEGAL, ACCOUNTING OR OTHER
          FINANCIAL ADVISORS, WHO LIKEWISE SHALL BE BOUND BY THE SAME
         CONFIDENTIALITY RESTRICTIONS SET FORTH IN THE CONFIDENTIALITY
                                   AGREEMENT.






                            Medtech Investments, Inc.
                              Exclusive Sales Agent
                                2008 Litho Place
                       Fayetteville, North Carolina 28304
                                 1-800-682-7971

<PAGE>

                 The Date of this Memorandum is December 9, 1998

                  TEXAS LITHOTRIPSY LIMITED PARTNERSHIP I L.P.

                             up to $251,500 in Cash

                 up to 20 Units of Limited Partnership Interest
                           at $12,575 in Cash per Unit

Texas Lithotripsy  Limited  Partnership I L.P., a Texas limited partnership (the
"Partnership")  operated by its General  Partner,  Lithotripters,  Inc., a North
Carolina  corporation  (the "General  Partner"),  hereby offers on the terms set
forth herein up to 20 Units (the "Units") of limited partnership interest in the
Partnership,  at a  price  per  Unit of  $12,575  in  cash.  See  "Terms  of the
Offering."  Each Unit will represent an initial 0.83%  economic  interest in the
Partnership.  See "Risk Factors - Other Investment  Risks - Dilution  of Limited
Partners'  Interest." The  Partnership  owns and operates two LithostarTM second
generation extracorporeal shock-wave lithotripters for the lithotripsy of kidney
stones.  The  LithostarsTM are installed in a self-propelled  Coach and a mobile
Trailer  (collectively,  each  Coach/Trailer with the  installed  LithostarTM is
referred to herein as a "Mobile Lithotripsy System") enabling the Partnership to
provide  lithotripsy  services at various locations  throughout south Texas (the
"Service Area").

The  Partnership  intends to use the  proceeds  of this  Offering  primarily  to
finance  the  cost  of  upgrading  one of  the  LithostarsTM, and  the  cost  of
reconditioning the Coach and renting a loaner Mobile Lithotripsy System from the
General  Partner  or  its  Affiliates   during  the  time  the  Coach  is  being
reconditioned.  See  "Use  of  Proceeds."  The  cash  purchase  price  is due at
subscription;  however,  prospective Investors who meet certain requirements may
be able fund a portion of their Unit purchase price with the proceeds of certain
third-party financing.  See "Terms of the Offering - Limited Partner Loans." The
Offering will  terminate on January 20, 1999 (or earlier upon the sale of all 20
Units as provided  herein),  unless  extended at the  discretion  of the General
Partner for a period not to exceed 180 days. 
                         ______________________________

Purchase of Units involves risks and is suitable only for persons of substantial
means who have no need for liquidity in this  investment.  Among other  factors,
prospective  investors  should note that (1) the Partnership  faces  substantial
competition  in the Service Area and (2) the health care  industry is undergoing
significant   government   regulatory  reforms.  See  "Risk  Factors"  and  "The
Offering - Suitability Standards."
                         ______________________________


                                    Cash         Selling               Net Cash
                               Offering Price   Commissions(1)       Proceeds(2)
Per Unit(3)                       $ 12,575       $     250             $ 12,275
Total Maximum(4)                  $251,500       $   5,000             $246,500

(See Footnotes on Back of Cover Page)

See Glossary for capitalized terms used herein and not otherwise defined.

<PAGE>

                                                     ___________________________

          (1) The  Units  will be sold on a  "best-efforts"  any or all basis by
     MedTech Investments,  Inc., a broker-dealer  registered with the Securities
     and Exchange Commission, a member of the National Association of Securities
     Dealers,  Inc. and an Affiliate of the General Partner (the "Sales Agent").
     The  Partnership  will pay the Sales Agent a $250  commission for each Unit
     sold and will  reimburse  the Sales  Agent for its  Offering  costs (not to
     exceed  $7,500).  The  Partnership  has agreed to indemnify the Sales Agent
     against certain liabilities, including liabilities under the Securities Act
     of 1933 (the "Securities Act"). See "Plan of Distribution."

          (2) Net Cash Proceeds do not reflect  deduction of expenses payable by
     the  Partnership.  See "Use of Proceeds."  The price per Unit  ($12,575) is
     payable in cash upon Subscription; provided, that prospective Investors who
     meet  certain  requirements  may be able to fund a  portion  of their  Unit
     purchase  price with the  proceeds of certain  third-party  financing.  The
     Partnership  has arranged for financing of a portion of the Units' purchase
     price  with  First-  Citizens  Bank & Trust  Company,  Fayetteville,  North
     Carolina (the  "Bank").  Therefore,  in lieu of paying the entire  purchase
     price  in cash at  subscription,  prospective  Investors  may  execute  and
     deliver to the Sales Agent  together with their  subscription  packets,  at
     least  $2,500  cash and a Limited  Partner  Note  payable  to the Bank in a
     maximum principal amount of up to $10,075 per Unit to be purchased,  a Loan
     and Security Agreement,  Security Agreement and two Uniform Commercial Code
     Financing Statements ("UCC-1s") (collectively,  the "Loan Documents").  See
     "Terms  of the  Offering  -  Limited  Partner  Loans"  and the forms of the
     Limited  Partner  Note,  the  Loan  and  Security  Agreement  and  Security
     Agreement  attached to the Form of Bank  Commitment as Exhibits A, B and C,
     respectively, which is attached hereto as Appendix C and the UCC's attached
     as part of the Subscription Packet.

          (3) Each  Investor  may  purchase  no less than one Unit.  The General
     Partner,  however,  reserves  the  right  to sell  less  than one Unit as a
     minimum  investment on a limited  basis,  and to reject in whole or in part
     any  subscription.  Purchases of fractional Units will be in multiples of 
     one-half Units.

          (4) Offering  Proceeds  will first be used by the  Partnership  to pay
     offering  costs and  expenses  (up to  $37,250)  and the  remainder  of the
     proceeds  will  be  used  to  finance  the  cost  of  upgrading  one of the
     LithostarsTM by installing a higher  intensity  shock head, and the cost of
     reconditioning  the Coach and renting a loaner  Mobile  Lithotripsy  System
     from the  General  Partner  or its  Affiliates  during  the time one of the
     Partnership's  Mobile  Lithotripsy  Systems  is out of  service  due to the
     reconditioning  of the Coach. See "Use of Proceeds." The Partnership  seeks
     by this  Offering to sell up to 20 Units for an aggregate of up to $251,500
     in cash ($246,500 net of Sales Agent's commissions). All subscription funds
     and Loan Documents will be held in an interest  bearing escrow account with
     First-Citizens  Bank & Trust Company,  which is  headquartered  in Raleigh,
     North  Carolina  and has  approximately  330 offices in Virginia  and North
     Carolina, until the acceptance of the Investor's subscription

                                                        ii
<PAGE>

          (and  approval by the Bank if the  Investor is  financing a portion of
     the Unit purchase price through a Limited  Partner Loan),  rejection of the
     Investor's subscription or termination of the Offering. The Partnership has
     set no minimum  number of Units to be sold in this  Offering.  Accordingly,
     upon the  receipt  and  acceptance  of an  Investor's  subscription  by the
     Partnership  as  provided  herein,  such  Investor  will be admitted to the
     Partnership as a Limited Partner, provided that acceptance of subscriptions
     by an Investor that elects to finance a portion of his or her Unit purchase
     price  is  conditioned  upon  approval  by the  Bank of his or her  Limited
     Partner  Loan.  Upon  admission  as  a  Limited  Partner,   the  Investor's
     subscription  funds  will be  released  to the  Partnership  and  the  Loan
     Documents,  if  any,  will  be  released  to  the  Bank.  In  the  event  a
     subscription is rejected,  all subscription funds (without  interest),  the
     Loan  Documents,  if any, and other  subscription  documents held in escrow
     will be promptly  returned to the  rejected  Investor.  The  Offering  will
     terminate  on  January  20,  1999,  unless it is sooner  terminated  by the
     General Partner,  or unless extended for an additional period not to exceed
     180 days. See "The Offering - General."
                                              _______________________

          THE  UNITS  ARE  BEING  OFFERED  PURSUANT  TO AN  EXEMPTION  FROM  THE
          REGISTRATION  REQUIREMENTS  OF THE SECURITIES ACT OF 1933, AS AMENDED,
          PROVIDED  IN  SECTION 4(2)  THEREOF  AND  RULE  506  OF  REGULATION  D
          PROMULGATED  THEREUNDER,  AS  AMENDED,  AND AN  EXEMPTION  FROM  STATE
          REGISTRATION  PROVIDED BY THE NATIONAL  SECURITIES MARKETS IMPROVEMENT
          ACT OF 1996. A REGISTRATION STATEMENT RELATING TO THESE SECURITIES HAS
          NOT BEEN FILED WITH ANY STATE SECURITIES AGENCY OR WITH THE SECURITIES
          AND EXCHANGE COMMISSION. ______________

          NEITHER  THE  SECURITIES   AND  EXCHANGE   COMMISSION  NOR  ANY  STATE
          REGULATORY BODY HAS PASSED UPON THE VALUE OF THE SECURITIES,  MADE ANY
          RECOMMENDATIONS  AS TO THEIR  PURCHASE,  APPROVED OR  DISAPPROVED  THE
          OFFERING,  OR PASSED UPON THE ADEQUACY OR ACCURACY OF THIS MEMORANDUM.
          ANY REPRESENTATION TO THE CONTRARY IS UNLAWFUL.
                                                  ______________

          THESE  SECURITIES ARE SUBJECT TO RESTRICTIONS ON  TRANSFERABILITY  AND
          RESALE AND MAY NOT BE TRANSFERRED OR RESOLD EXCEPT AS PERMITTED  UNDER
          THE  SECURITIES  ACT OF 1933,  AS AMENDED,  AND THE  APPLICABLE  STATE
          SECURITIES LAWS, PURSUANT TO REGISTRATION OR EXEMPTION  THEREFROM.  NO
          PUBLIC OR OTHER MARKET EXISTS OR WILL DEVELOP FOR THE UNITS. UNITS ARE
          NOT  TRANSFERABLE  WITHOUT  THE  CONSENT OF THE  GENERAL  PARTNER  AND
          SATISFACTION OF CERTAIN OTHER


                                                        iii
<PAGE>

          CONDITIONS  INCLUDING  THE  AVAILABILITY  OF AN  EXEMPTION  UNDER  THE
          SECURITIES ACT OF 1933 AND VARIOUS STATE  SECURITIES  LAWS.  INVESTORS
          SHOULD PROCEED ONLY ON THE  ASSUMPTION  THAT THEY MAY HAVE TO BEAR THE
          ECONOMIC RISK OF AN  INVESTMENT IN THE UNITS FOR AN INDEFINITE  PERIOD
          OF TIME. ______________

          IN MAKING AN  INVESTMENT  DECISION,  INVESTORS  MUST RELY ON THEIR OWN
          EXAMINATION  OF THE PERSON OR ENTITY  CREATING THE  SECURITIES AND THE
          TERMS OF THE OFFERING,  INCLUDING THE MERITS AND RISKS INVOLVED. THESE
          SECURITIES  HAVE  NOT  BEEN   RECOMMENDED  BY  ANY  FEDERAL  OR  STATE
          SECURITIES  COMMISSION  OR  REGULATORY  AUTHORITY.   FURTHERMORE,  THE
          FOREGOING  AUTHORITIES  HAVE NOT  CONFIRMED THE ACCURACY OR DETERMINED
          THE ADEQUACY OF THIS DOCUMENT. ANY REPRESENTATION TO THE CONTRARY IS A
          CRIMINAL OFFENSE. ______________

          PROSPECTIVE  INVESTORS  SHOULD  NOT  CONSTRUE  THE  CONTENTS  OF  THIS
          MEMORANDUM OR ANY PRIOR OR SUBSEQUENT COMMUNICATIONS,  WHETHER WRITTEN
          OR ORAL,  FROM THE  PARTNERSHIP,  ITS  GENERAL  PARTNER  OR ANY OF ITS
          AGENTS OR  REPRESENTATIVES  AS INVESTMENT,  TAX OR LEGAL ADVICE.  THIS
          MEMORANDUM  AND THE  APPENDICES  HERETO,  AS WELL AS THE NATURE OF THE
          INVESTMENT,  SHOULD BE  REVIEWED  BY EACH  PROSPECTIVE  INVESTOR,  HIS
          INVESTMENT,  TAX OR  OTHER  ADVISORS,  AND HIS  ACCOUNTANTS  OR  LEGAL
          COUNSEL.
                                                  ______________

          NO OFFERING  LITERATURE OR ADVERTISING IN WHATEVER FORM WILL OR MAY BE
          EMPLOYED  IN  THE  OFFERING  OF  UNITS,  EXCEPT  FOR  THIS  MEMORANDUM
          (INCLUDING   AMENDMENTS  AND   SUPPLEMENTS,   IF  ANY)  AND  DOCUMENTS
          SUMMARIZED  HEREIN. NO PERSON IS AUTHORIZED TO GIVE ANY INFORMATION OR
          TO MAKE ANY  REPRESENTATION NOT CONTAINED IN THIS MEMORANDUM OR IN THE
          APPENDICES  HERETO,  AND, IF GIVEN OR MADE, SUCH OTHER  INFORMATION OR
          REPRESENTATION MUST NOT BE RELIED UPON.
                                                  ______________

          THE GENERAL PARTNER WILL MAKE AVAILABLE, PRIOR TO THE CLOSING, TO EACH
          PROSPECTIVE INVESTOR OR HIS REPRESENTATIVES,  OR BOTH, THE OPPORTUNITY
          TO ASK QUESTIONS OF, AND RECEIVE  ANSWERS FROM, THE GENERAL PARTNER OR
          A PERSON ACTING ON ITS BEHALF  CONCERNING  THE TERMS AND CONDITIONS OF
          THIS  OFFERING,  THE  PARTNERSHIP,  THE  GENERAL  PARTNER OR ANY OTHER
          RELEVANT  MATTERS,  AND TO OBTAIN ANY ADDITIONAL  INFORMATION,  TO THE
          EXTENT THAT THE

                                                        iv
<PAGE>

          GENERAL PARTNER  POSSESSES SUCH  INFORMATION OR CAN ACQUIRE IT WITHOUT
          UNREASONABLE  EFFORT OR EXPENSE,  NECESSARY  TO VERIFY THE ACCURACY OF
          THE INFORMATION HEREIN SET FORTH,  SUBJECT TO CERTAIN  CONFIDENTIALITY
          RESTRICTIONS  CONTAINED  IN  VARIOUS  CONTRACTS  WITH  THIRD  PARTIES.
                                 ______________

          THIS MEMORANDUM CONTAINS SUMMARIES, BELIEVED BY THE GENERAL PARTNER TO
          BE ACCURATE,  OF CERTAIN TERMS OF CERTAIN DOCUMENTS,  BUT REFERENCE IS
          HEREBY MADE TO THE ACTUAL  DOCUMENTS,  COPIES OF WHICH  ACCOMPANY THIS
          MEMORANDUM  OR ARE  AVAILABLE  FROM THE GENERAL  PARTNER UPON REQUEST,
          SUBJECT TO CERTAIN  CONFIDENTIALITY  RESTRICTIONS CONTAINED IN VARIOUS
          CONTRACTS  WITH THIRD  PARTIES.  ALL SUCH  SUMMARIES  ARE QUALIFIED IN
          THEIR ENTIRETY BY THIS REFERENCE.
                                                  ______________

          THIS  OFFER  CAN  BE  WITHDRAWN  AT ANY  TIME  BEFORE  CLOSING  AND IS
          SPECIFICALLY  MADE SUBJECT TO THE TERMS DESCRIBED IN THIS  MEMORANDUM.
          SUBJECT TO SPECIFIC  RESTRICTIONS  PROVIDED  FOR  HEREIN,  THE GENERAL
          PARTNER  RESERVES THE RIGHT TO REJECT ANY  SUBSCRIPTION IN WHOLE OR IN
          PART OR TO  ALLOT  TO ANY  INVESTOR  LESS  THAN  THE  NUMBER  OF UNITS
          SUBSCRIBED FOR BY SUCH INVESTOR. SEE "TERMS OF THE OFFERING."
                                                  ______________

          THIS  MEMORANDUM HAS BEEN PREPARED SOLELY FOR THE BENEFIT OF INVESTORS
          INTERESTED  IN  THE  PROPOSED  PRIVATE  PLACEMENT  OF  THE  UNITS  AND
          CONSTITUTES  AN OFFER  ONLY IF THE NAME OF AN  OFFEREE  APPEARS IN THE
          APPROPRIATE  SPACE PROVIDED ON THE COVER PAGE HEREOF.  DISTRIBUTION OF
          THIS  MEMORANDUM  TO ANY  PERSON  OTHER  THAN SUCH  OFFEREE  AND THOSE
          PERSONS  RETAINED TO ADVISE HIM WITH RESPECT THERETO IS  UNAUTHORIZED,
          AND ANY REPRODUCTION OF THIS  MEMORANDUM,  IN WHOLE OR IN PART, OR THE
          DIVULGENCE OF ANY OF ITS CONTENTS,  WITHOUT THE PRIOR WRITTEN  CONSENT
          OF THE GENERAL  PARTNER,  IS  PROHIBITED.  EACH OFFEREE,  BY ACCEPTING
          DELIVERY  OF THIS  MEMORANDUM,  AGREES TO  RETURN  IT AND ALL  RELATED
          APPENDICES  AND OTHER  DOCUMENTS  TO THE GENERAL  PARTNER,  2008 LITHO
          PLACE,  FAYETTEVILLE,  NORTH CAROLINA  28304,  IF THE OFFEREE DOES NOT
          INTEND TO  SUBSCRIBE  FOR THE  PURCHASE  OF THE UNITS,  THE  OFFEREE'S
          SUBSCRIPTION IS NOT ACCEPTED OR THE OFFER IS TERMINATED.
                                                  ______________



                                                         v
<PAGE>

          NEITHER THE DELIVERY OF THIS  MEMORANDUM  NOR ANY SALES MADE HEREUNDER
          SHALL, UNDER ANY CIRCUMSTANCES, IMPLY THAT THERE HAS BEEN NO CHANGE IN
          THE AFFAIRS OF THE PARTIES  DESCRIBED HEREIN SINCE THE DATE HEREOF, OR
          THAT THE INFORMATION  CONTAINED HEREIN IS CORRECT AS OF ANY TIME AFTER
          THE DATE OF THIS  MEMORANDUM.  THIS  MEMORANDUM DOES NOT CONSTITUTE AN
          OFFER OR SOLICITATION IN ANY STATE TO ANY PERSON TO WHOM SUCH OFFER OR
          SOLICITATION WOULD BE UNLAWFUL.
                                                  ______________

          THE BUSINESS OF THE PARTNERSHIP  INVOLVES  CONFLICTS OF INTEREST.  SEE
          "CONFLICTS OF INTEREST."
                                                  ______________

          AFFILIATES  OF THE  GENERAL  PARTNER  WILL  CONTINUE  TO RECEIVE  FEES
          WHETHER  OR NOT THE  PARTNERSHIP  EARNS  ANY  ADDITIONAL  INCOME.  SEE
          "COMPENSATION  AND  REIMBURSEMENT  TO  THE  GENERAL  PARTNER  AND  ITS
          AFFILIATES."
                                  ____________

          THE GENERAL PARTNER  BELIEVES THIS OFFERING IS AN ECONOMIC  INVESTMENT
          OPPORTUNITY; THUS, INVESTORS SHOULD NOT PURCHASE UNITS IN ANTICIPATION
          OF TAX BENEFITS.
                                 ______________




                                                        vi

<PAGE>

                                      Page

                                TABLE OF CONTENTS

                                                                          Page

RISK FACTORS...................................................................1
         Operating Risks.......................................................1
         Tax Risks.............................................................7
         Other Investment Risks................................................9

THE PARTNERSHIP...............................................................12

TERMS OF THE OFFERING.........................................................13
         The Units and Subscription Price.....................................13
         Acceptance of Subscriptions..........................................13
         Limited Partner Loans ...............................................14
         Subscription Period; Closing.........................................15
         Offering Exemption...................................................15
         Suitability Standards................................................16
         How to Invest........................................................17
         Restrictions on Transfer of Units....................................18

PLAN OF DISTRIBUTION..........................................................19

BUSINESS ACTIVITIES...........................................................20
         General  ............................................................20
         Treatment Methods for Kidney Stone Disease...........................20
         The LithostarTM......................................................21
         The Coach and Trailer................................................22
         Anticipated Partnership Expenditures.................................22
         Acquisition of Additional Assets.....................................22
         Hospital Contracts...................................................22
         Management...........................................................23
         Employees............................................................24

THE GENERAL PARTNER...........................................................24

COMPENSATION AND REIMBURSEMENT TO THE
         GENERAL PARTNER AND ITS AFFILIATES...................................26

CONFLICTS OF INTEREST.........................................................27

FIDUCIARY RESPONSIBILITY OF THE GENERAL PARTNER...............................29



                                                        vii
<PAGE>

COMPETITION...................................................................29
         Affiliated Competition...............................................29
         Other Competition....................................................30

REGULATION....................................................................31
         Federal Regulation...................................................31
         State Regulation.....................................................38

PRIOR ACTIVITIES..............................................................39

SOURCES AND APPLICATIONS OF FUNDS.............................................41

FINANCIAL CONDITION OF THE PARTNERSHIP........................................42

MANAGEMENT'S DISCUSSION AND
         ANALYSIS OF THE RESULTS OF OPERATIONS................................47
         Ten Months Ended October 31, 1998 and October 31, 1997...............47
         Year Ended December 31, 1997 and December 31, 1996...................47
         Year Ended December 31, 1996 and December 31, 1995...................47

SUMMARY OF THE PARTNERSHIP AGREEMENT..........................................48
         Powers of the General Partner........................................50
         Rights and Liabilities of the Limited Partners.......................51
         Restrictions on Transfer of Partnership Interests....................51
         Dissolution and Liquidation..........................................52
         Noncompetition Agreement and Protection of Confidential Information..52
         Optional Purchase of Limited Partner Interests.......................53
         Dilution Offerings...................................................53
         Arbitration..........................................................54
         Power of Attorney....................................................54
         Reports to Limited Partners..........................................54
         Records  ............................................................55

LEGAL MATTERS.................................................................55

GLOSSARY .....................................................................55






                                                       viii
<PAGE>

Appendix A        AGREEMENT OF LIMITED PARTNERSHIP OF TEXAS LITHOTRIPSY
                  LIMITED PARTNERSHIP I L.P.

Appendix B        FORM OF BANK COMMITMENT (WITH EXHIBITS)

Appendix C        FORM OF OPINION OF WOMBLE CARLYLE SANDRIDGE & RICE, PLLC

Appendix D        NOTES TO FINANCIAL STATEMENTS


                                                        ix
<PAGE>

                                  RISK FACTORS

     Prior to subscribing for Units,  Investors  should  carefully  examine this
entire  Memorandum,  including the Appendices hereto, and should give particular
consideration  to the general risks  attendant to  speculative  investments  and
investments in partnerships generally,  and to the other special operating,  tax
and other investment risks set forth below.
Operating Risks

     General Risks of Operations. Although the General Partner and its personnel
have significant  experience in managing  lithotripsy  enterprises,  whether the
Partnership  can continue to effectively  operate and expand its business cannot
be accurately  predicted.  The benefits of an investment in the Partnership also
depend on many  factors  over which the  Partnership  has no control,  including
competition,  technological innovations rendering the Mobile Lithotripsy Systems
less  competitive  or  obsolete,  and  other  matters.  The  Partnership  may be
adversely  affected by various  changing  local  factors  such as an increase in
local unemployment, a change in general economic conditions, changes in interest
rates and  availability  of  financing,  and other  matters  that may render the
operation of its Mobile  Lithotripsy  Systems  difficult or unattractive.  Other
factors  that may  adversely  affect the  operation  of its  Mobile  Lithotripsy
Systems are unforeseen increased operating expenses,  energy shortages and costs
attributable thereto, uninsured losses and the capabilities of the Partnership's
management personnel.

     Uncertainties  Related to Changing Healthcare  Environment.  The healthcare
industry has experienced  substantial changes in recent years.  Although managed
care has yet to become a major factor in the delivery of  lithotripsy  services,
the General Partner anticipates that managed care programs, including capitation
plans,  may play an increasing role in the delivery of lithotripsy  services and
that  competition for these services may shift from individual  practitioners to
health  maintenance  organizations  and other  significant  providers of managed
care. No assurance can be given that the changing  healthcare  environment  will
not have a material adverse effect on the Partnership.

     Lack of Diversification.  The Partnership's  fundamental purpose will be to
continue to operate the Mobile Lithotripsy  Systems.  Because the Partnership is
dependent  on only  one  line of  business,  it will  have  greater  risks  from
unexpected   service   interruptions,    equipment   breakdowns,   technological
developments,  kidney stone treatment medical  breakthroughs,  economic problems
and similar matters than would be the case with a more diversified business.

     Dependence on Insurance Reimbursement.  The prices the Partnership are able
to charge its patients for the  lithotripsy  of kidney  stones is  significantly
dependent  upon the amount of  reimbursement  private health care insurers allow
for this procedure. Most of the Partnership's patients pay for services directly
from private payment sources,  primarily from third-party  insurers such as Blue
Cross/Blue Shield and other commercial insurers. Coverage and payment levels for
these private  payment  sources vary  depending  upon the  patient's  individual
insurance policy. While the Partnership does not rely on Medicare  reimbursement
for a substantial portion of its revenues,

                                                         1
<PAGE>

     the  Medicare   program  has   historically   influenced   the  setting  of
reimbursement standards by private insurance programs. The Health Care Financing
Administration  ("HCFA") has  recently  proposed  rules which would  establish a
prospective  payment  system  for  hospital  outpatient  procedures,   including
lithotripsy.  HCFA's proposed reimbursement rate for lithotripsy is $2,612. This
rate is lower than the typical charge for lithotripsy services currently charged
by the  Partnership  and  could  result  in  private  payment  sources  such  as
third-party   insurers  lowering  the  reimbursement   rates  they  pay  to  the
Partnership.  The  General  Partner  anticipates  that over  time  reimbursement
amounts for both the  professional  and technical  components of the lithotripsy
procedure may continue to decrease. See "Regulation."

     Reliability and Efficacy of the Partnership's Lithotripters.The LithostarTM
has a ten-year  United  States  operating  history,  having  received  premarket
approval from the FDA for renal lithotripsy on September 30, 1988. This approval
followed a period of clinical  testing  beginning in February  1987 at four test
sites in the United States,  which was preceded by substantial  clinical testing
of the LithostarTM at the Urological Clinic of the Johannes Gutenberg University
of  Mainz,  West  Germany.  The  General  Partner  estimates  that more than 400
LithostarTM  systems are currently  operating in over twenty countries,  and the
General  Partner  and its  Affiliates  operate  over 30  LithostarsTM  in  other
ventures.  In the General  Partner's  opinion,  the LithostarTM has proven to be
reliable  and  dependable   medical   equipment;   however,   downtime   periods
necessitated for maintenance or repairs of the Partnership's  Mobile Lithotripsy
Systems will adversely affect Partnership  revenues. In 1996, the FDA approved a
new higher intensity  shock-head  system for the LithostarTM,  which the General
Partner believes has shortened  procedure times.  Only one of the  Partnership's
LithostarsTM has been upfitted with the new tube system.  The other  LithostarTM
is scheduled to be upgraded in 1999.  Based upon a detailed  follow-up  study of
86,000 renal and 51,000 ureteral stones treated on the LithostarTM in all of the
General  Partners's  affiliated  partnerships  using both the original and newer
shock-head systems,  the General Partner notes an 86% total success rate with an
overall  retreatment  rate of only 15%. This retreatment rate included stones of
all sizes and  locations,  including  staghorn  calculi which at times  required
multiple treatments.  Based upon this study and the General Partner's experience
in doing well in excess of 128,000  cases over the past nine and one-half  years
in its affiliated  limited  partnerships,  the General Partner is of the opinion
that the LithostarTM is presently a very effective and sound alternative for the
treatment of renal stones.

     Investors should note that some studies indicate that lithotripsy may cause
high blood  pressure  and tissue  damage.  The  General  Partner  questions  the
reliability  of these  studies  and  believes  lithotripsy  has  become a widely
accepted method for the treatment of renal stones.

     Technological Obsolescence.  The history of lithotripsy of kidney stones as
an accepted treatment  procedure is relatively  recent,  with the first clinical
trials being conducted in West Germany beginning in 1980 and the first premarket
approval for a renal  lithotripter in the United States being granted by the FDA
in December 1984.  Today,  lithotripsy is the treatment  procedure of choice for
kidney stone disease, having replaced other treatment methods. Published reports
indicate that certain  researchers are attempting to improve a laser  technology
to more easily


                                                         2
<PAGE>

     eradicate kidney stones, and pharmaceutical  companies and researchers have
attempted to develop a safe drug that can be used to dissolve  kidney  stones in
all cases. The General Partner cannot predict the outcome of ongoing research in
these  areas,  and  any one or  more  developments  could  reduce  or  eliminate
lithotripsy  as an  acceptable  procedure or treatment  method of choice for the
treatment of kidney stones.

     Partnership  Limited Resources and Risks of Leverage.  The proceeds of this
Offering cannot be accurately  determined until the Closing has occurred and the
number of Units sold has been  calculated.  In the event such  proceeds  are not
sufficient  to fund all  anticipated  expenses,  it may be necessary in order to
meet current or projected  expenses,  to supplement  Partnership  funds with the
proceeds of debt financing.  See "Business Activities - Anticipated  Partnership
Expenditures"  and  "Sources  and  Application  of Funds."  Although the General
Partner   maintains  good   relationships   with  certain   commercial   lending
institutions, it has not obtained a loan commitment from any party in any amount
on behalf of the  Partnership  and whether one would  timely be  forthcoming  on
terms  acceptable  to the  Partnership  cannot be assured.  The General  Partner
and/or its  Affiliates  may, but are under no  obligation  to, make loans to the
Partnership,  and there is no assurance that they would be willing or able to do
so at the time, in amounts and on terms required by the  Partnership.  While the
General Partner does not anticipate that it would cause the Partnership to incur
indebtedness unless cash generated from Partnership  operations were at the time
expected to enable  repayment of such loan in accordance  with its terms,  lower
than anticipated  revenues and/or greater than anticipated expenses could result
in the Partnership's  failure to make payments of principal or interest when due
under such a loan and the Partnership's  equity being reduced or eliminated.  In
such event, the Limited Partners could lose their entire investment.

     Acquisition  of  Additional  Assets.  If in the future the General  Partner
determines  that it is in the best interest of the Partnership to acquire one or
more  additional  fixed base or Mobile  Lithotripsy  Systems (or any other renal
stone  treatment  equipment)  for the  treatment  of renal  stones,  the General
Partner has the authority  (without  obtaining the Limited Partners' consent) to
establish  reserves or borrow  additional  funds on behalf of the Partnership to
accomplish such goals, and may use Partnership assets and revenues to secure and
repay such borrowings.  The acquisition of additional  assets may  substantially
increase the Partnership's monthly  obligations and result in greater personnel
requirements.  See  "Risk  Factors  -  Operating  Risks  -  Partnership  Limited
Resources  and Risks of  Leverage."  The  General  Partner  does not  anticipate
acquiring additional  Partnership assets unless projected  Partnership Cash Flow
or  proceeds   from  a  Dilution   Offering  are   sufficient  to  finance  such
acquisitions. In any event, no Limited Partner would be personally liable on any
additional  Partnership   indebtedness  without  such  Partner's  prior  written
consent.  There  is no  assurance  that  financing  would  be  available  to the
Partnership  to  acquire  additional  assets or to fund any  additional  working
capital  requirements.  Any such  borrowing  by the  Partnership  will  serve to
increase  the risks to the  Partnership  associated  with  leverage  as provided
above.

     Competition.  Several  competing  fixed-site and mobile  lithotripters  are
currently  operating in and around the Service Area in direct  competition  with
the Partnership's Mobile


                                                         3
<PAGE>

     Lithotripsy Systems. The competing  lithotripsy service providers generally
have existing  contracts with hospitals and other facilities,  or are hospitals,
themselves.  There is no assurance  that other  parties will not, in the future,
operate  fixed-site or mobile  lithotripters  in and around the Service Area. To
the General  Partner's  knowledge,  no manufacturers are restricted from selling
their lithotripters to other parties in the Service Area. In addition, except as
provided by law,  neither the General  Partner nor its Affiliates are prohibited
from  engaging  in any  business  or  arrangement  that  may  compete  with  the
Partnership.  Several  ventures  affiliated  with the  General  Partner  provide
lithotripsy services in the Service Area's vicinity.  See "Prior Activities" and
"Competition."  Affiliates  of the General  Partner are planning and  conducting
other limited  partnership  offerings that would operate  lithotripters in other
states.  In addition,  the  Partnership  will be competing  with  facilities and
individual  medical  practitioners  who  offer  conventional   treatment  (e.g.,
surgery) for kidney stones.  In order to be  successful,  the  Partnership  must
continually  convince  physicians  and potential  patients of the quality of the
treatment  it can  provide,  its  reasonable  charges,  the  superiority  of its
lithotripters  to other  lithotripters  and the advantages of  lithotripsy  over
conventional  surgery and other treatment  methods.  The  Partnership  Agreement
severely  restricts the Limited  Partners' ability to own interests in competing
equipment or ventures. The enforceability of these noncompetition  agreements is
generally a matter of state law and is evolving over time. There is no assurance
that  one or  more  Limited  Partners  may not  successfully  compete  with  the
Partnership.  See  "Proposed  Activities  - Treatment  Methods for Kidney  Stone
Disease" and "Competition."

     Government  Regulation.  All facets of the  healthcare  industry are highly
regulated and will become more so in the future.  The ability of the Partnership
to operate  legally and be  profitable  may be adversely  affected by changes in
governmental regulations, including expected changes in reimbursement,  Medicare
and Medicaid certification regulations,  federal and state fraud and abuse laws,
including  the Federal  Anti-kickback  Statute,  the Federal  False  Claims Act,
federal and state  self-referral  laws, state  restrictions on fee splitting and
other governmental regulation.  See "Regulation." These laws and regulations may
adversely  affect the economic  viability of the Partnership and may subject the
General  Partner  and all  Limited  Partners  to  governmental  scrutiny  and/or
prosecution as a felony and punishment in the form of large monetary fines, loss
of  licensure,  imprisonment  and exclusion  from Medicare and Medicaid.  Recent
changes in Medicare and Medicaid law have limited provider ownership and control
over the various health care services to which  physicians may make Medicare and
Medicaid referrals. The primary laws involved are the "Stark II" federal statute
prohibiting  financial  relationships between physicians and certain entities to
which  they  refer  patients,  and the  Anti-Kickback  Statute  which  prohibits
compensation in exchange for or to induce referrals.

     Regarding   Stark  II,  in  January,   1998,   the  Health  Care  Financing
Administration  ("HCFA"),  the federal agency  responsible for administering the
Medicare program,  published proposed Stark II  regulations.  Under the proposed
regulations,  physician  Limited  Partner  referrals  of Medicare  and  Medicaid
patients to contracting  hospitals for lithotripsy services would be prohibited.
If HCFA adopts the proposed  Stark II  regulations  as final,  or if a reviewing
court were to interpret the Stark II  statute using the proposed  regulations as
guidance,  then the Partnership and its physician  Limited  Partners would be in
violation of Stark II. In such instance, the Partnership


                                                         4
<PAGE>

     and/or its physician Limited Partners may be required to refund any amounts
collected from Medicare and Medicaid  patients in violation of the statute,  and
they may be  subject  to civil  monetary  penalties  and/or  exclusion  from the
Medicare and Medicaid programs.

     The Anti-Kickback Statute prohibits paying or receiving any remuneration in
exchange for making a referral for healthcare  services which may be paid for by
Medicare,  Medicaid or CHAMPUS.  The law has been broadly interpreted to include
any payments which may induce or influence a physician to refer patients. One of
the federal agencies that enforces the Anti- Kickback Statute has issued several
"safe harbors"  which,  if complied  with,  result in the payment or transaction
being  deemed not to violate  the law.  This  Offering  does not comply with any
"safe harbor." There is limited  guidance from  reviewing  courts  regarding the
application of the broad language of the Anti-Kickback Statute to joint ventures
similar to the one described in this Offering.  In order to prove  violations of
the  Anti-Kickback  law, the government  must establish that one or more parties
offered,  solicited  or paid  remuneration  to induce or reward  referrals.  The
government  has  said  that  in  certain  situations  the  mere  offering  of an
opportunity  to invest in a venture would  constitute  illegal  remuneration  in
violation of the  Anti-Kickback  Statute.  Although the General Partner believes
that the structure  and purpose of the  Partnership  is in  compliance  with the
Anti- Kickback  Statute,  there is no assurance that  government  officials or a
reviewing  court would  agree.  Violation  of the  Anti-Kickback  Statute  could
subject the Partnership,  the General Partner and the physician Limited Partners
to criminal  penalties,  fines and/or  exclusion  from the Medicare and Medicaid
programs.

     In  addition  to  the  Stark  II and  Anti-Kickback  laws,  an  unfavorable
interpretation   of  other  existing  laws,  or  enactment  of  future  laws  or
regulations,   could   potentially   adversely   affect  the  operation  of  the
Partnership.

     Regarding state law,  various  licensure  requirements  must be met for the
Partnership to provide  mobile  lithotripsy  services in Texas,  and the General
Partner  has  complied  with  such   requirements.   See   "Regulation  -  State
Regulation."

     Contract  Terms  and  Termination.  The  Partnership  provides  lithotripsy
services  to 8 Contract  Hospitals  pursuant to 8 separate  Hospital  Contracts.
Many, but not all, of the Hospital Contracts grant the Partnership the exclusive
right to provide  Lithotripsy  Services at the  particular  Contract  Hospitals.
Substantially  all of the Hospital  Contracts provide for automatic renewal on a
year-to-year  basis. Four of the Hospital Contracts are terminable without cause
upon 90 days or less written notice by either party prior to any renewal date or
the noticed  termination date, or upon customary events of default.  The General
Partner believes it has a good relationship with the Contract Hospitals and does
not anticipate significant  terminations.  There is no assurance,  however, that
terminations  will  either  not  occur  or  that  the  resulting  impact  to the
Partnership would not have a material adverse effect on Partnership  operations.
It is expected that most new lithotripsy  service  contracts would have one-year
terms and be automatically renewed unless either party elects to cancel prior to
the end of the term. In addition,  many of the existing  contracts have, and any
new contracts are expected to have,  provisions  permitting  termination  in the
event certain laws or

                                                         5
<PAGE>

     regulations  are enacted or applied to the  contracting  parties'  business
arrangements  in a manner deemed  materially  detrimental  to either party.  See
"Government  Regulation"  above.  Thus,  there is no assurance that  Partnership
operations  as  planned  on the date of this  Memorandum  will  occur as  herein
described or  contemplated,  and the  cancellation  of a  significant  number of
service contracts or the Partnership's inability to secure new ones could have a
material  negative  impact  on  the  financial  condition  and  results  of  the
Partnership.  In  addition,  competing  vendors  may  attempt  to cause  certain
Contract Hospitals to contract with them instead of the Partnership. The loss of
Contract Hospitals to competition will adversely affect Partnership revenues and
such effect could be material.  See "Proposed Activities - Business Activities -
Hospital Contracts"and "Risk Factors - Competition."

     Loss on Dissolution and  Termination.  Upon the dissolution and termination
of the Partnership, the proceeds realized from the liquidation of its assets, if
any, will be distributed to its partners only after  satisfaction  of the claims
of all creditors.  Accordingly,  the ability of a Limited Partner to recover all
or any portion of his  investment  under such  circumstances  will depend on the
amount of funds so  realized  and the  claims  to be  satisfied  therefrom.  See
"Summary of the  Partnership  Agreement - Optional  Purchase of Limited  Partner
Interests."

     Year 2000 Compliance. The now familiar "Year 2000 Issue" arose because many
existing  computer  programs  use only the last two  digits  to refer to a year.
Therefore,  such computer programs do not properly  recognize a year that begins
with "20" instead of "19." If not corrected,  many computer  applications  could
fail or create erroneous results on January 1, 2000. The extent of the potential
impact of the Year 2000 Issue is not yet known, and if not timely corrected,  it
could affect the global  economy.  The General Partner has made an assessment of
the Partnership's Year 2000 Issue risks and has concluded that the risks include
the following:  (i) operation of the Mobile Lithotripsy Systems may be adversely
affected;  (ii) third party payors may be adversely affected resulting in delays
in payment to the Partnership; (iii) facilities served by the Mobile Lithotripsy
Systems may be  adversely  affected  resulting  in a cessation of service to the
affected  facilities;  and (iv) the Partnership's  internal information systems,
including its accounting  system,  may be adversely affected resulting in record
keeping and accounting delays. Siemens, the manufacturer of the LithostarTM, has
not assured  Prime that its  LithostarsTM  will be Year 2000  compliant,  in all
necessary  respects,  i.e.,  that they will continue to operate  normally  after
January 1, 2000. The General Partner cannot predict with certainty  whether such
will be the case or the effects of  noncompliance.  The General  Partner has not
inquired as to the Year 2000 readiness of any Contract Hospital, vendor or other
third party related to the  operation of the Business,  but is relying that such
parties will be Year 2000 compliant.  The General Partner  anticipates  that the
internal information systems, including accounting systems, that it will use for
Partnership purposes will be Year 2000 compliant by the end of 1999, although no
assurance can be given that such will be the case. The Partnership currently has
no  contingency  plans in the  event  that any of the  above-described  risks is
realized.  In the event that any of the above-described  risks are realized,  or
any other,  unanticipated  Year 2000 Issue problems arise, the Partnership could
be forced to cease its  operations  for an  indefinite  period of time while the
Year 2000 problems are remedied, at a cost which cannot be

                                                         6
<PAGE>

     accurately  predicted at this time.  Any such  interruption  in Partnership
operations would adversely affect Partnership revenues.

Tax Risks

     Investors  should note that the General Partner  anticipates no significant
tax benefits  associated with the operation of the Mobile Lithotripsy Systems or
the Partnership. No ruling will be sought from the Service on the federal income
tax consequences of any of the matters discussed in this Memorandum or any other
tax issues affecting the Partnership or the Limited Partners. The Partnership is
relying upon an opinion of its Counsel with respect to certain  material  United
States  federal  income tax  issues.  Counsel's  opinion  is not  binding on the
Service as to any issue, however, and there is no assurance that any deductions,
or the period in which deductions may be claimed,  will not be challenged by the
Service.  Each Investor should  carefully  review the following risk factors and
consult his own tax advisor with respect to the federal,  state and local income
tax consequences of an investment in the Partnership.

THE TAX RISKS SET FORTH IN THIS  SECTION ARE NOT  INTENDED  TO BE AN  EXHAUSTIVE
LIST OF THE GENERAL OR SPECIFIC  TAX RISKS  RELATING TO THE PURCHASE OF UNITS IN
THE  PARTNERSHIP.  EACH  INVESTOR  IS  DIRECTED  TO THE FULL  OPINION OF COUNSEL
(APPENDIX C TO THE  MEMORANDUM).  IT IS STRONGLY  RECOMMENDED THAT EACH INVESTOR
INDE PENDENTLY CONSULT HIS PERSONAL TAX COUNSEL  CONCERNING THE TAX CONSEQUENCES
ASSOCIATED WITH HIS OWNERSHIP OF AN INTEREST IN THE PARTNERSHIP. THE CONCLUSIONS
REACHED IN THE OPINION ARE RENDERED WITHOUT ASSURANCE THAT SUCH CONCLUSIONS HAVE
BEEN OR WILL BE ACCEPTED BY THE SERVICE OR THE COURTS.

THIS MEMORANDUM AND THE OPINION DO NOT DISCUSS, NOR WILL COUNSEL BE RENDERING AN
OPINION  REGARDING,  THE  ESTATE  AND GIFT TAX OR STATE  AND  LOCAL  INCOME  TAX
CONSEQUENCES OF AN INVESTMENT IN THE PARTNERSHIP.  FURTHERMORE, INVESTORS SHOULD
NOTE THAT THE  ANTICIPATED  FEDERAL INCOME TAX  CONSEQUENCES OF AN INVESTMENT IN
THE  PARTNERSHIP  MAY BE  ADVERSELY  AFFECTED  BY FUTURE  CHANGES IN THE FEDERAL
INCOME TAX LAWS, WHETHER BY FUTURE ACTS OF CONGRESS OR FUTURE ADMINISTRATIVE AND
JUDICIAL  INTERPRETATIONS  OF  APPLICABLE  FEDERAL  INCOME TAX LAWS.  ANY OF THE
FOREGOING MAY BE GIVEN RETROACTIVE EFFECT.

     Possible  Legislative  or Other  Actions  Effecting Tax  Consequences.  The
federal income tax treatment of an investment in an  equipment/service  oriented
limited  partnership  such as the  Partnership  may be modified by  legislative,
judicial  or  administrative  action  at any  time,  and  any  such  action  may
retroactively  affect  investments  and commitments  previously  made. The rules
dealing with federal  income  taxation of limited  partnerships  are  constantly
under review by the

                                                         7
<PAGE>

     Service,   resulting   in  revisions   of  its   regulations   and  revised
interpretations  of  established  concepts.  In  evaluating an investment in the
Partnership  each  Investor  should  consult  with his personal tax advisor with
respect to possible legislative, judicial and administrative developments.

     Disqualification  of  Employee  Benefit  Plans.  Purchase  of  Units in the
Partnership  may  cause  certain  Limited   Partners,   certain   hospitals  and
out-patient  centers,  the  Partnership,  and  employees of the  foregoing to be
treated under Section 414(m) of the Code as being employed in the aggregate by a
single employer or "affiliated  service group" for purposes of minimum coverage,
participation and other employee benefit plan requirements  imposed by the Code.
In contrast,  an employer not affiliated under Section 414(m) need only consider
its own employees in determining whether its employee benefit plans satisfy Code
requirements.  Aggregation of employees could cause the  disqualification of the
retirement plans of certain Limited Partners and related  entities.  Aggregation
could  also  require  the value of the  vested  retirement  benefit  of a highly
compensated  employee who is a participant in a disqualified plan to be included
in his gross income,  regardless  of whether the employee is a Limited  Partner.
These rules may  adversely  affect  Investors  who are  currently  involved in a
medical  practice  joint  venture,  regardless of their purchase of Units in the
Partnership.  The General Partner and legal counsel to the Partnership have been
informally advised by officials of the Service that the Service would not likely
attempt to apply the affiliated service group rules to the Partnership,  nor has
the Service applied these rules to similar  arrangements  in the past.  Informal
discussions with the Service, however, are not binding on the Service, and there
can be no guarantee that the Service will not apply the affiliated service group
rules to the Partnership.

     Partnership   Allocations.   The  Partnership  Agreement  contains  certain
allocations of profits and losses that could be reallocated by the Service if it
were determined that the allocations did not have "substantial economic effect."
On December 31, 1985 the  Regulations  dealing with the propriety of partnership
allocations were finalized. As a general rule, allocations of profits and losses
must have  "substantial  economic effect." Based upon current law, Counsel is of
the opinion that, if the question were  litigated,  it is more probable than not
that the allocation of profits and losses set forth in the Partnership Agreement
would be sustained for federal  income tax purposes.  This opinion is subject to
certain  assumptions  and  qualifications.  Investors  are  cautioned  that  the
foregoing  opinion is based in part upon final  regulations  which have not been
extensively commented upon or construed by the courts.

     Income in Excess of Distributions.  The Partnership Agreement provides that
in each year annual Distributions may be made to the Partners. Excluded from the
definition of cash available for  distribution  is the amount of funds necessary
to discharge  Partnership  debts and to maintain  certain cash  reserves  deemed
necessary by the General  Partner.  If Partnership  Cash Flow is insufficient to
fund expenses and maintain adequate reserves, a Limited Partner could be subject
to income taxes payable out of personal funds to the extent of the Partnership's
income,  if any,  attributed  to him  without  receiving  from  the  Partnership
sufficient  Distributions to pay the Limited  Partner's tax with respect to such
income.



                                                         8
<PAGE>

     Passive Income and Losses The General Partner expects the Partnership  will
realize  taxable  income and not  taxable  losses  during the next five years of
operation.  Nevertheless,  if it realizes taxable losses, the use of such losses
by the Limited  Partners  will  generally be limited by Code  Section 469.  Code
Section 469 provides  limitations for the use of taxable losses  attributable to
"passive  activities."  Code Section 469 operates  generally to prohibit passive
losses from being used except against income from passive activities.
 
     Upon the  taxable  disposition  to an  unrelated  party of all of a passive
activity,  or a substantial  part of a passive activity that may be treated as a
separate activity,  any unused deferred loss allocable to that passive activity,
or to that  substantial  part of the  passive  activity  that  is  treated  as a
separate  activity,   can  be  used  to  reduce  any  gain  realized  upon  such
disposition,  with any excess loss  available  for  deduction  first against any
other passive  income and then in full against any other income or gain from any
source.

THE PASSIVE ACTIVITY LOSS RULES WILL AFFECT EACH INVESTOR DIFFERENTLY, DEPENDING
ON HIS OWN TAX SITUATION.  EACH INVESTOR SHOULD CONSULT WITH HIS OWN TAX ADVISOR
TO  DETERMINE  THE  EFFECT  OF  THESE  RULES  ON THE  INVESTOR  IN  LIGHT OF THE
INVESTOR'S INDIVIDUAL FACTS AND CIRCUMSTANCES.

     Taxable Income The Partnership  Agreement provides that in each year of the
Part nership,  annual  Distributions may be made to the Partners.  Excluded from
the definition of cash available for  Distributions,  however,  is the amount of
funds  necessary  to amortize  Partnership  debts and to maintain  certain  cash
reserves deemed necessary by the General Partner. The Partnership may also incur
significant capital costs that may have to be paid out of Partnership  revenues.
Thus,  taxable  income may very well exceed  cash  available  for  distribution.
Because of the  circumstances  outlined  above,  if Partnership  cash flow falls
substantially  below a certain  level,  a Limited  Partner  could be  subject to
income taxes  payable out of personal  funds to the extent of the  Partnership's
income,  if any,  attributed  to him  without  receiving  from  the  Partnership
sufficient cash to pay the Limited Partner's tax with respect to such income.

Other Investment Risks

     Conflicts of Interest.  The activities of the Partnership  involve numerous
existing  and  potential  conflicts  of interest  between the  Partnership,  the
General Partner and their Affiliates. See "Compensation and Reimbursement to the
General  Partner  and its  Affiliates,"  "General  Partner,"  "Competition"  and
"Conflicts of Interest."

     No Participation  in Management.  The General Partner has full authority to
supervise  the  business  and  affairs  of  the  Partnership   pursuant  to  the
Partnership  Agreement and the Management  Agreement.  Limited  Partners have no
right to participate in the management or conduct of the Partnership's  business
and affairs.  The General  Partner,  its  employees and its  Affiliates  are not
required to devote  their full time to the  Partnership's  affairs and intend to
continue

                                                         9
<PAGE>

     devoting   substantial   time  and  effort  to  organizing   and  operating
partnerships and other ventures throughout the United States that are similar to
the  Partnership.  The General  Partner will continue to devote such time to the
Partnership's  business and affairs as it deems necessary and appropriate in the
exercise of reasonable judgment. The participation by any Limited Partner in the
management  or control of the  Partnership's  affairs could render him generally
liable for the  liabilities  of the  Partnership  that could not be satisfied by
assets of the  Partnership.  See the Form of Legal  Opinion  of  Womble  Carlyle
Sandridge & Rice, a Professional  Limited Liability Company,  attached hereto as
Appendix C.

     Limited  Partners'  Obligation to Return Certain  Distributions.  Except as
provided by other  applicable  law and provided that a Limited  Partner does not
participate in the management of the  Partnership,  he or she will not be liable
for the liabilities of the Partnership in excess of his investment,  his ratable
share  of  undistributed   profits  and  any  Distribution   received  from  the
Partnership if the Limited  Partner knew at the time of the  Distribution  that,
after giving effect to the  Distribution,  all  liabilities of the  Partnership,
other than liabilities to Partners with respect to their  Partnership  interests
and  liabilities  for which the  recourse  of  creditors  is limited to specific
property of the limited partnership,  exceed the fair value of the assets of the
Partnership,  except  that  the fair  value of  property  that is  subject  to a
liability  for which  recourse of creditors is limited  shall be included in the
Partnership  assets  only to the  extent  that the fair  value of such  property
excludes such liability.

     Dilution  of Limited  Partners'  Interests.  The  General  Partner  has the
authority  under the  Partnership  Agreement to cause the  Partnership to issue,
offer  and sell  additional  limited  partnership  interests  in the  future  (a
"Dilution  Offering");  provided  that the  Percentage  Interests of the General
Partner and Initial Limited Partners,  as in effect prior to the commencement of
this Offering,  may not be diluted through  Dilution  Offerings  (including this
Offering) by more than 20% in the aggregate without the prior written consent of
a Majority in Interest of all the  Partners.  Upon the sale of  interests in the
Partnership in a Dilution  Offering,  the  Percentage  Interests of the Partners
will be  proportionately  diluted.  See "Summary of the Partnership  Agreement -
Dilution Offerings."

     Liability  Under  Limited  Partner Loan.  Investors  financing a portion of
their Unit  purchase  price with the proceeds of a Limited  Partner Loan will be
directly  obligated  to the Bank as  provided in the Loan  Documents.  A default
under the  Limited  Partnership  Loan  could  result in the  foreclosure  of the
Investor's right to receive any Partnership Distributions as well as the loss of
other  personal  assets  unrelated  to  his  Partnership  Interest.  Prospective
Investors  should  review  carefully  all the  provisions  contained in the Loan
Commitment  and the  terms of the  Limited  Partner  Note and Loan and  Security
Agreement with his counsel and financial  advisors.  Neither the Partnership nor
the General  Partner  endorses or  recommends to the  prospective  Investors the
desirability  of obtaining  financing  from the Bank nor does the summary of the
Loan Documents  provided herein  constitute  legal advice.  A Limited  Partner's
liability  under a Limited  Partner  Note  continues  regardless  of whether the
Limited Partner remains a limited partner in the Partnership.  As a consequence,
such  liability  cannot be avoided by claims,  defenses or set-offs  the Limited
Partner  may  have  against  the  Partnership,  the  General  Partner  or  their
Affiliates. In addition to the suitability


                                                        10
<PAGE>

     requirements  discussed below, any prospective Investor applying for a Bank
loan to fund a portion of his Unit  purchase  must be  approved  by the Bank for
purposes of his delivery of the Limited  Partner Note. The Bank has  established
its own criteria for approving the  creditworthiness  of a prospective  Investor
and has not established  objective minimum suitability  standards.  Instead, the
Bank is empowered to accept or reject prospective Investors.

     Long-term Investment.  The General Partner anticipates that the Partnership
will continue to operate the Mobile Lithotripsy Systems for an indefinite period
of time and that  the  Partnership  will  not  liquidate  prior to its  intended
termination.  Accordingly,  Investors  should  consider their  investment in the
Partnership as a long-term investment of indefinite duration.

     Limited Transferability and Illiquidity of Units.  Transferability of Units
is  severely  restricted  by the  Partnership  Agreement  and  the  Subscription
Agreement, and the consent of the General Partner is necessary for any transfer.
No public market for the Units exists and none is expected to develop. Moreover,
the Units  generally  may not be  transferred  unless  the  General  Partner  is
furnished with an opinion of counsel,  satisfactory to the General  Partner,  to
the effect that such assignment or transfer may be effected without registration
under  the  Securities  Act and any  state  securities  laws  applicable  to the
transfer.  The Partnership  will be under no obligation to register the Units or
otherwise take any action that would enable the assignment or transfer of a Unit
to be in compliance with applicable  federal and state  securities laws. Thus, a
Limited Partner may not be able to liquidate an investment in the Partnership in
the  event  of an  emergency  and the  Units  may  not be  readily  accepted  as
collateral for loans.  Moreover, a sale of a Unit by a Limited Partner may cause
adverse  tax  consequences  to the selling  Limited  Partner.  Accordingly,  the
purchase of Units must be considered a long-term and illiquid investment.

     Arbitrary  Offering  Price.  The  offering  price  of the  Units  has  been
determined  by the  General  Partner  based upon  valuation  of the  Partnership
conducted by an independent third party based on various assumptions that may or
may not occur. A copy of this  valuation will be made available on request.  The
offering  price of the Units is not,  however,  necessarily  indicative of their
value,  if any,  and no  assurance  can be  given  that the  Units,  if and when
transferable, could be sold for the offering price or for any amount.

     Limitation  of  General  Partner's  Liability  and   Indemnification.   The
Partnership  Agreement  provides that the General  Partner will not be liable to
the  Partnership  or to any  Partner  for  errors in  judgment  or other acts or
omissions in connection with the Partnership as long as the General Partner,  in
good faith,  determined  such course of conduct was in the best  interest of the
Partnership, and such course of conduct did not constitute willful misconduct or
gross negligence.  Therefore, the Limited Partners may have a more limited right
of  action  against  the  General  Partner  in the event of its  misfeasance  or
malfeasance  than they would  have  absent the  limitations  in the  Partnership
Agreement.  The  Partnership  will indemnify the General  Partner against losses
sustained by the General Partner in connection with the Partnership, unless such
losses came as a result of the General  Partner's  gross  negligence  or willful
misconduct. In the opinion of the SEC, indemnification

                                                        11
<PAGE>

     for  liabilities  arising out of the  Securities  Act is contrary to public
policy and therefore is unenforceable.

     Insurance.  Prime maintains active policies of insurance for the benefit of
itself  and  certain  affiliated  entities  covering  employee  crime,  workers'
compensation,   business  and  commercial  automobile  operations,  professional
liability,  inland marine,  business interruption,  real property and commercial
liability risks. These policies include the Partnership, and the General Partner
believes that coverage limits of these policies are within  acceptable norms for
the extent and nature of the risks covered.  The  Partnership is responsible for
its share of premium costs. There are certain types of losses, however, that are
either uninsurable or are not economically insurable. For instance,  contractual
liability is generally not covered under  Prime's  policies.  Should such losses
occur with respect to Partnership operations,  or should losses exceed insurance
coverage limits,  the Partnership could suffer a loss of the capital invested in
its Mobile Lithotripsy Systems and any anticipated profits from such investment.

     Optional  Purchase  of  Limited  Partner  Interests.  As  provided  in  the
Partnership  Agreement,  the General  Partner and the Limited  Partners have the
option to  purchase  all the  interest of a Limited  Partner who (i) dies,  (ii)
becomes  insolvent  or (iii)  acquires  a direct  or  indirect  ownership  of an
interest in a competing venture. The option purchase price is an amount equal to
the withdrawing Limited Partner's share of the Partnership's book value, if any,
as  reflected  by the  Limited  Partner's  capital  account  in the  Partnership
(unadjusted  for any  appreciation  as  reflected in  Partnership  assets and as
reduced by depreciation deductions claimed by the Partnership for tax purposes).
The option purchase price is likely to be considerably less than the fair market
value of a  Limited  Partner's  interest  in the  Partnership.  Because  losses,
depreciation  deductions and Distributions reduce capital accounts,  and because
appreciation in assets is not reflected in capital  accounts,  it is the opinion
of the General  Partner that the option purchase price may be nominal in amount.
See the form of the  Partnership  Agreement  attached  hereto as  Appendix A and
"Summary of the  Partnership  Agreement - Optional  Purchase of Limited  Partner
Interests."

                                 THE PARTNERSHIP

     Texas Lithotripsy  Limited  Partnership I L.P., a Texas limited partnership
(the  "Partnership")  was organized and created under the Texas Revised  Limited
Partnership  Act  (the  "Act")  on June 5,  1990.  The  general  partner  of the
Partnership is Lithotripters,  Inc., a North Carolina  corporation (the "General
Partner"),  and a wholly  owned  subsidiary  of  Prime  Medical  Services,  Inc.
("Prime"). The General Partner currently holds a 20% interest in the Partnership
in its capacity as the general  partner and the existing  limited  partners (the
"Initial  Limited  Partners")  currently  hold the remaining 80% interest in the
Partnership as limited partners (including a 26.5% limited partner interest held
by the General Partner and a 13% limited partner  interest held by Affiliates of
the General  Partner).  In the event that all 20 Units offered  hereby are sold,
the General Partner will hold  approximately  a 17% general partner  interest in
the  Partnership,  the Initial  Limited  Partners will hold  approximately a 67%
limited partner interest in the Partnership and the Investors who purchase the

                                                        12
<PAGE>

     Units offered  hereby (the "New Limited  Partners")  will hold an aggregate
16.67%  interest in the  Partnership.  The  Percentage  Interests of the General
Partner and Initial Limited Partners  (aggregate) will decrease by approximately
0.166% and 0.664%,  respectively,  for each Unit sold. The principal  address of
the Partnership and the General Partner is 2008 Litho Place, Fayetteville, North
Carolina 28034.  The telephone number of the Partnership and the General Partner
is (800) 682-7971.

                              TERMS OF THE OFFERING

The Units and Subscription Price

     Texas Lithotripsy  Limited Partnership I L.P., a limited partnership formed
under the laws of the State of Texas,  hereby offers an aggregate of 20 Units of
limited partner interest in the Partnership (the "Units").  Each Unit represents
an initial 0.83% economic interest in the Partnership. See "Risk Factors - Other
Investment Risks - Dilution of Limited  Partners'  Interests." Each Investor may
purchase not less than one Unit. The General Partner may,  however,  in its sole
discretion,  sell less than one Unit as a minimum investment and reject in whole
or in part any subscription.  The price for each Unit is $12,575 in cash payable
at subscription;  however, certain qualified Investors may fund a portion of the
purchase price through  Limited  Partner Loans the Partnership has arranged with
the Bank. See "Terms of the Offering - Limited  Partner  Loans." The Proceeds of
the Offering  will first be used by the  Partnership  to pay offering  costs and
expenses,  and the  remainder of the proceeds will be used to upgrade one of the
Partnership's   LithostarsTM  (estimated  at  $75,000),   to   recondition   the
Partnership's  Coach  (estimated  at $50,000)  and to pay for a "loaner"  Mobile
Lithotripsy   System   during  the  time  the   Partnership's   Coach  is  being
reconditioned (estimated at $8,750 loaner per week for a seven week period). See
"Sources and  Applications  of Funds." The proceeds of this  Offering  cannot be
calculated until the number of Units sold has been determined at the Closing. To
the extent the  proceeds  of the  Offering  are  insufficient  to fund the costs
described above, or such costs exceed the estimated  amounts,  it is anticipated
that  Partnership Cash Flow and/or the proceeds of debt financing will fund such
costs.  There is no  assurance,  however,  that  Partnership  Cash  Flow or debt
financing  will be available  for such  purposes.  See "Risk Factors - Operating
Risks - Partnership Limited Resources and Risks of Leverage."
Acceptance of Subscriptions

     An  Investor  that pays the full amount of his or her Unit  purchase  price
with a check at subscription and whose  subscription is received and accepted by
the Partnership,  will become a Limited Partner in the  Partnership,  and his or
her  subscription  funds  will  be  released  from  escrow  to the  Partnership.
Acceptance by the General  Partner of a subscription  of an Investor that elects
to finance a portion of the Unit  purchase  price with the proceeds of a Limited
Partner  Note is  conditioned  upon the Bank's  approval  of such  loan.  If the
financing Investor is otherwise acceptable to the Partnership,  after receipt of
the Bank's  approval,  the Partnership  will inform the Escrow Agent that it has
accepted the Investor's  subscription and the Escrow Agent will release the Loan
Documents  to the Bank  and the Bank  will  pay the  proceeds  from the  Limited
Partner Loan to the

                                                        13
<PAGE>

     Partnership.  The Investor will become a Limited Partner in the Partnership
at the time the Bank releases the proceeds of his or her Limited Partner Note to
the  Partnership.  Subscriptions  may be  rejected  in  whole  or in part by the
Partnership  and need not be accepted in the order  received.  To the extent the
Partnership reduces an Investor's subscription as provided above, the Investor's
cash Unit purchase price,  or the principal  amount of his Limited Partner Note,
as the case may be, will be  proportionately  refunded  and  reduced.  Notice of
acceptance of an Investor's  subscription  to purchase  Units and his Percentage
Interest in the Partnership  will be furnished  promptly after acceptance of the
Investor's Subscription.

Limited Partner Loans

     The  purchase  price for the Units is payable in cash with the  prospective
Investor's  personal funds and/or in part with the proceeds of a Limited Partner
Loan.  Financing under the Limited Partner Loans was arranged by the Partnership
with the Bank as provided in the Loan Commitment, attached hereto as Appendix B.
If the prospective Investor wishes to finance a portion of the purchase price of
his Units as  provided  herein,  he or she must  deliver to the Sales Agent upon
submission of his  Subscription  Packet an executed Limited Partner Note payable
to the Bank and Note  Addendum,  the form of which are  attached as Exhibit A to
the  Loan  Commitment,  a Loan  and  Security  Agreement,  the  form of which is
attached as Exhibit B to the Loan Commitment,  a Security Agreement, the form of
which is attached as Exhibit C to the Loan Commitment and two UCC-1's,  the form
of which  are  attached  to the  Subscription  Packet  (collectively,  the "Loan
Documents").  In no event  may the  maximum  amount  borrowed  per  Unit  exceed
$10,075.  The Limited  Partner Note is  repayable  in twelve (12)  predetermined
installments  in the respective  amounts set forth in the Loan  Commitment.  The
installments  are  payable  on each  January  15th,  April  15th,  June 15th and
September  15th  commencing on April 15,  1999  (assuming the Closing  occurs in
January 1999), with a thirteenth (13th) and final installment in an amount equal
to the principal  balance then owed on the Limited Partner Note and all accrued,
unpaid  interest  thereon due and payable on the third  anniversary of the first
installment  date.  Interest accrues at the Bank's "Prime Rate," as the same may
change  from time to time.  The  Prime  Rate  refers  to that  rate of  interest
established  by the Bank and  identified  as such in  literature  published  and
circulated  within  the  Bank's  offices.  Such  term  is  used  as a  means  of
identifying  a rate of interest  index and not as a  representation  by the Bank
that such rate is  necessarily  the lowest or most  favorable  rate of  interest
offered to borrowers of the Bank generally.  A prospective Investor will have no
claim or right of  action  based on such  premise.  See the form of the  Limited
Partner Note attached as Exhibit A to the Loan Commitment.

     The  Limited  Partner  Note will be secured by the cash flow  distributions
payable  with  respect to the  prospective  Investor s  Partnership  Interest as
provided in the Loan and Security  Agreement  and the Security  Agreement and as
evidenced by the UCC-1s.  By  executing  the Loan and  Security  Agreement,  the
prospective  Investor  requests the Bank to extend the Loan Commitment to him if
he is approved for a Limited Partner Loan. The Loan and Security  Agreement also
authorizes (i) the Bank to pay the proceeds of the Limited Partner Note directly
to the  Partnership  and the  Partnership  to  acknowledge  receipt  thereof and
(ii) the  Partnership to remit funds directly to the Bank out of the prospective
Investor's share of any Distributions represented by the

                                                        14
<PAGE>

     prospective  Investor's percentage Partnership Interest to fund installment
payments due on the prospective Investor's Limited Partner Note. See the form of
the Loan and Security  Agreement  attached as  Exhibit B to the Loan  Commitment
which is attached hereto as Appendix B.

     If the  prospective  Investor is approved by the Bank and is  acceptable to
the General  Partner,  the Escrow Agent will,  upon acceptance of the Investor's
subscription by the General Partner,  release the Loan Documents to the Bank and
the Bank will pay the proceeds of the Limited Partner Note to the Partnership to
fund a portion of the Investor's Unit purchase.  The  prospective  Investor will
have  substantial  exposure  under the Limited  Partner Note.  Regardless of the
results of Partnership operations,  a prospective Investor will remain liable to
the Bank under his Limited  Partner Note  according  to its terms.  The Bank can
accelerate the entire  principal amount of the Limited Partner Note in the event
the Bank in good faith believes the prospect of timely payment or performance by
the  prospective  Investor is impaired or the Bank otherwise in good faith deems
itself or its collateral insecure and upon certain other events,  including, but
not  limited  to,  nonpayment  of any  installment.  The Bank  may also  request
additional   collateral  in  the  event  it  deems  the  Limited   Partner  Note
insufficiently  secured.  A Limited Partner's  liability under a Limited Partner
Note also continues  regardless of whether the Limited Partner remains a limited
partner  in the  Partnership.  A  Limited  Partner's  liability  under a Limited
Partner Note is directly with the Bank. As a consequence,  such liability cannot
be avoided by claims,  defenses or set-offs the Limited Partner may have against
the  Partnership,  the General Partner or their  Affiliates.  In addition to the
suitability  requirements  discussed  below,  the  prospective  Investor must be
approved by the Bank for purposes of his delivery of the Limited  Partner  Note.
The Bank has established its own criteria for approving the  creditworthiness of
a prospective  Investor and has not established  objective  minimum  suitability
standards.  Instead,  the Bank is  empowered  to accept  or  reject  prospective
Investors.  See "Risk Factors - Other Investment Risks - Liability Under Limited
Partner Loans."

Subscription Period; Closing

     The subscription period will commence on the date hereof and will terminate
at 5:00 p.m.,  Central time,  on January 20, 1999 (the "Closing  Date"),  unless
sooner  terminated by the General  Partner or unless  extended for an additional
period up to 180 days. See "Plan of Distribution."

Offering Exemption

     The Units are being  offered and will be sold in  reliance on an  exemption
from the  registration  requirements  of the Securities Act of 1933, as amended,
provided  by Section  4(2)  thereof  and Rule 506 of  Regulation  D  promulgated
thereunder, as amended, and an exemption from state registration provided by the
National Securities Markets  Improvement Act of 1996. The suitability  standards
set forth below have been established in order to comply with the terms of these
offering exemptions.


                                                        15
<PAGE>

Suitability Standards

     In addition to the suitability  requirements discussed below, each Investor
wishing to obtain a Limited  Partner Loan must be approved by the Bank. The Bank
has  established  its  own  criteria  for  approving  the  credit-worthiness  of
Investors and has not established objective minimum suitability  standards.  The
Bank has sole discretion to accept or reject any Investor.

     An investment in the  Partnership  involves a high degree of financial risk
and is suitable only for persons of substantial financial means who have no need
for  liquidity  in their  investments  and who can  afford  to lose all of their
investment.  See "Terms of The  Offering - Limited  Partner  Loans." An Investor
should not purchase a Unit if the Investor does not have resources sufficient to
bear the loss of the entire amount of the purchase price,  including any portion
financed.  The General  Partner  anticipates  selling  Units only to  individual
investors;  however,  the General  Partner  reserves  the right to sell Units to
entities.
 
     Because of the risks involved,  the General Partner anticipates selling the
Units only to Investors  residing in Texas who it  reasonably  believes meet the
definition  of  "accredited  investor" as that term is defined in Rule 501 under
the  Securities  Act, but reserves the right to sell up to 35 Investors  who are
nonaccredited investors.  Certain institutions and the following individuals are
"accredited investors":

(1) An  individual  whose net worth (or joint net worth with his or her  spouse)
exceeds $1,000,000 at the time of subscription;

(2) An individual who has had an individual income in excess of $200,000 in each
of the two most recent  fiscal years and who  reasonably  expects an  individual
income in excess of $200,000 in the current year; or

(3) An individual who has had with his or her spouse a joint income in excess of
$300,000 in each of the two most recent fiscal years and who reasonably  expects
a joint income in excess of $300,000 in the current year.

     Investors  must also be at least 21 years old and otherwise  duly qualified
to acquire and hold  partnership  interests.  The General  Partner  reserves the
right to refuse to sell Units to any person,  subject to Federal and  applicable
state securities laws.

     Each Investor must make an independent  judgment,  in consultation with his
own counsel,  accountant,  investment advisor or business advisor, as to whether
an  investment in the Units is  advisable.  The fact that an Investor  meets the
Partnership's  suitability  standards should in no way be taken as an indication
that an investment in the Units is advisable for that Investor.

     It is anticipated that suitability  standards comparable to those set forth
above will be imposed by the Partnership in connection with resales,  if any, of
the Units. Transferability of Units

                                                        16
<PAGE>

     is severely  restricted by the Partnership  Agreement and the  Subscription
Agreement. See "Summary of the Partnership Agreement."

     Investors who wish to subscribe for Units must represent to the Partnership
that they meet the foregoing standards by completing and delivering to the Sales
Agent a Purchaser Questionnaire in the form included in the Subscription Packet.
Each  Purchaser  Representative,  if any,  acting on behalf  of an  Investor  in
connection  with this  offering  must  complete and deliver to the Sales Agent a
Purchaser  Representative  Questionnaire  (a copy of  which  is  available  upon
request to the General Partner).

How to Invest

     Investors who meet the qualifications for investment in the Partnership and
who wish to subscribe for Units may do so as follows:

     a. By  completing,  dating,  signing  and  acknowledging  the  Subscription
Agreement and the Counterpart  Signature Page to the Partnership  Agreement (the
forms of  which  are  included  in the  Subscription  Packet  accompanying  this
Memorandum);

     b. By completing,  dating and signing the Purchaser Questionnaire (the form
of which is included in the Subscription Packet accompanying this Memorandum);

     c. By having any  purchaser  representative  who has acted on behalf of the
Investor in connection with this Offering complete,  date and sign the Purchaser
Representative  Questionnaire  (a copy of which is available upon request to the
General Partner);

     d. By completing,  dating and signing the Purchaser Financial Statement (in
the form included in the Subscription Packet), or in lieu thereof,  substituting
the  Investor's  own  personal  executed  financial  statement,  as long as such
substitute statement contains the same information as in the form provided,  and
attaching to the Purchaser Financial Statement or substitute  statement,  as the
case may be, pages one and two of the  Investor's  most recently filed Form 1040
U.S. Individual Income Tax Return;

     e. If the Investor is financing a portion of the Unit purchase price with a
Limited Partner Loan, by completing and signing (on the front and the back), but
not  dating,  a  Limited  Partner  Note and  signing  the form of Note  Addendum
attached  thereto (the form of which Limited  Partner Note  (including  the Note
Addendum) is included in the Subscription Packet and is attached as Exhibit A to
the Form of Bank Commitment);

     f. If the Investor is financing a portion of the Unit purchase price with a
Limited  Partner Loan, by completing and signing,  but not dating,  the Loan and
Security

                                                        17
<PAGE>

     Agreement (the form of which is included in the Subscription  Packet and is
attached as Exhibit B to the Form of Bank Commitment);

     g. If the Investor is financing a portion of the Unit purchase price with a
Limited  Partner Loan, by completing and signing,  but not dating,  the Security
Agreement  (the form of which is  included  in the  Subscription  Packet  and is
attached as Exhibit C to the Form of Bank Commitment);

     h. If the Investor is financing a portion of the Unit purchase price with a
Limited  Partner Loan,  by  completing  and signing two copies of the UCC-1 (the
form of which is included in the Subscription Packet); and

     i. By delivering  or mailing all of the foregoing  together with a check in
the amount of $12,575 per Unit  subscribed  for,  or $2,500 per Unit  subscribed
for, if the investor is financing a portion of the Unit purchase price through a
Limited  Partner Loan,  payable to  "First-Citizens  as Escrow Agent for Texas I
L.P." to the Sales  Agent at 2008  Litho  Place,  Fayetteville,  North  Carolina
28304.

     All  information  provided by Investors,  including the  information in the
Purchaser  Questionnaire  and the Purchaser  Financial  Statement,  will be kept
confidential and not disclosed  except to the Partnership,  the General Partner,
the Bank and their  respective  counsel  and  Affiliates  and, if  required,  to
governmental and regulatory authorities.

Restrictions on Transfer of Units

     The Units have not been  registered  under the  Securities Act or under any
state  securities  laws and  holders  of Units  have no  right  to  require  the
registration  of such Units or to require the  Partnership to disclose  publicly
information  concerning  the  Partnership.  Units  can be  transferred  only  in
accordance with the provisions of, and upon  satisfaction of, the conditions set
forth  in  the  Partnership  Agreement.  Among  other  things,  the  Partnership
Agreement  provides that no  assignment of Units may be made if such  assignment
could not be effected  without  registration  under the  Securities Act or state
securities  laws.  Moreover,  the  assignment  generally  must  be  made  to  an
individual   approved  by  the  General   Partner  who  meets  the   suitability
requirements described in this Memorandum.

     Assignors of Units will be required to execute certain  documents,  in form
and substance satisfactory to the General Partner,  instructing it to effect the
assignment.  Assignees  of Units  may also,  in the  discretion  of the  General
Partner,  be required  to pay all costs and  expenses  of the  Partnership  with
respect to the assignment.

     Any assignment of Units or the right to receive  Partnership  Distributions
in respect of Units will not release the assignor from any liabilities connected
with the assigned Units,  including  liabilities under any Limited Partner Loan.
An assignee, whether by sale or otherwise, will

                                                        18
<PAGE>

     acquire  only the rights of the  assignor in the profits and capital of the
Partnership  and not the  rights  of a Limited  Partner,  unless  such  assignee
becomes a substituted  Limited Partner. An assignee may not become a substituted
Limited  Partner  without (i) either the written consent of the assignor and the
General  Partner,  or the  consent  of a Majority  in  Interest  of the  Limited
Partners (except the assignor Limited Partner) and the General Partner, (ii) the
submission of certain  documents  and (iii) the payment of expenses  incurred by
the  Partnership  in effecting  the  substitution.  An assignee,  regardless  of
whether he becomes a substituted  Limited Partner,  will be subject to and bound
by all the terms and conditions of the Partnership Agreement with respect to the
assigned  Units.  See "Summary of the  Partnership  Interest -  Restrictions  on
Transfer of Partnership Interests."

                              PLAN OF DISTRIBUTION

     Subscriptions for Units will be solicited by MedTech Investments, Inc., the
Sales Agent,  which is an Affiliate of the General Partner.  The Sales Agent has
entered into a Sales Agency Agreement with the Partnership pursuant to which the
Sales Agent has agreed to act as exclusive  agent for the placement of the Units
on a "best  efforts"  any or all  basis.  The Sales  Agent is not  obligated  to
purchase any Units.

     The Sales Agent is a North Carolina Corporation that was formed on December
23, 1987, and became a member of the National  Association of Securities Dealers
on March 15, 1988. The Sales Agent will be engaged in other similar offerings on
behalf of the General  Partner and its  Affiliates  during the  pendency of this
offering  and in the future.  The Sales Agent is a wholly  owned  subsidiary  of
Prime,  which also owns all the stock of the General  Partner.  Investors should
note the material  relationship between the Sales Agent and the General Partner,
and are advised that the  relationship  creates  conflicts in the Sales  Agent's
performance of its due diligence  responsibilities  under the Federal securities
laws.

     As compensation for its services, the Sales Agent will receive a commission
equal  to  $250  for  each  Unit  sold.  No  other  commissions  will be paid in
connection with this Offering.  Subject to the conditions as provided above, the
Sales Agent may be reimbursed by the Partnership for its out-of-pocket  expenses
associated  with the sale of the Units in an amount  not to exceed  $7,500.  The
Partnership has agreed to indemnify the Sales Agent against certain liabilities,
including liabilities under the Securities Act.

     The  Partnership  will  not pay the fees of any  purchaser  representative,
financial advisor,  attorney,  accountant or other agent retained by an Investor
in connection with his or her decision to purchase Units.

     The subscription period will commence on the date hereof and will terminate
at  5:00 p.m.,  Austin,  Texas time,  on January 20, 1999,  (or earlier,  in the
discretion of the General  Partner),  unless  extended at the  discretion of the
General Partner for an additional period not to exceed 180 days.

                                                        19
<PAGE>

     The Partnership  seeks by this Offering to sell a maximum of 20 Units for a
maximum  of an  aggregate  of  $251,500  in cash  ($246,500  net of Sales  Agent
Commissions).  The  Partnership has set no minimum number of Units to be sold in
this Offering. The subscription funds, and Loan documents, if any, received from
each Investor will be held in escrow  (which,  in the case of cash  subscription
funds,  shall be held in an interest bearing escrow account with the Bank) until
either the Investor's  subscription is accepted by the Partnership (and approved
by the Bank in the case of financed purchases of Units), the Partnership rejects
the subscription or the Offering is terminated.  Upon the receipt and acceptance
of an  Investor's  subscription,  which,  if the  Investor  intends to finance a
portion  of the  Unit  purchase  price  with a  Limited  Partner  Loan,  will be
conditioned  upon the Bank's approval of the Loan, the Investor will be admitted
to the Partnership as a Limited  Partner.  Upon admission as a Limited  Partner,
the  Investor's   subscription  funds  will  be  released  from  escrow  to  the
Partnership,  and the Loan Documents, if any, will be released to the Bank which
will pay the proceeds from the Limited Partner Note to the  Partnership.  In the
event a subscription is not accepted, all subscription funds (without interest),
the Loan  Documents  and other  subscription  documents  held in escrow  will be
promptly  returned to the  rejected  Investor.  The Offering  will  terminate on
January 20, 1999,  unless it is sooner  terminated  by the General  Partner,  or
unless  extended for an additional  period not to exceed 180 days. See "Terms of
the Offering - Subscription Period; Closing."


                               BUSINESS ACTIVITIES

General

     The  Partnership was formed to (i) acquire the Mobile  Lithotripsy  Systems
and operate it at various  locations  primarily in south Texas, (ii) improve the
provision of health-care in the  Partnership's  service area by taking advantage
of  both  the  technological  innovations  inherent  in the  LithostarTM and the
Partnership's  quality assurance and outcome analysis  programs,  and (iii) make
cash  distributions to its Partners from revenues  generated by the operation of
the Mobile  Lithotripsy  Systems.  The Partnership  owns and operates two Mobile
Lithotripsy  Systems in the Service Area and has contracted with 8 hospitals and
medical centers to provide lithotripsy services for a per procedure fee.

Treatment Methods for Kidney Stone Disease

     Urolithiasis, or kidney stone disease, affects an estimated 600,000 persons
per year in the United  States.  The exact cause of kidney  stone  formation  is
unclear,  although  it has been  attributed  to diet,  climate,  metabolism  and
certain medications. Approximately 75% of all urinary stones pass spontaneously,
usually  within one to two weeks,  and require little or no clinical or surgical
intervention.  All other kidney stones, however, require some form of medical or
surgical  treatment.  A number of methods  are  currently  used to treat  kidney
stones. These methods include drug therapy,  cystoscopic procedures,  endoscopic
procedures,  laser  procedures,  open  surgery,   percutaneous  lithotripsy  and
extracorporeal shock wave lithotripsy. The type of treatment a urologist

                                                        20
<PAGE>


     chooses  depends on a number of factors such as the size of the stone,  its
location in the urinary  system and whether the stone is  contributing  to other
urinary  complications such as blockage or infection.  The extracorporeal  shock
wave  lithotripter,  introduced  in the United States from West Germany in 1984,
has  dramatically  changed the course of kidney  stone  disease  treatment.  The
General  Partner  estimates  that  currently up to 95% of all kidney stones that
require treatment can be treated by lithotripsy. Lithotripsy involves the use of
shock waves to disintegrate kidney stones noninvasively.

The LithostarTM

     The LithostarTM was developed as a cooperative  venture between Siemens and
the Urological Clinic at Johannes  Gutenberg  University in Mainz, West Germany.
As a part of this venture, a Lithostar  prototype was installed in March 1986 at
the Urological  Clinic at the University of Mainz with  successful  results.  On
November 18, 1987 the LithostarTM  was  unanimously  recommended for approval by
the FDA's advisory panel of experts for urology  devices.  On September 30, 1988
the LithostarTM received FDA premarket approval for use in the United States for
renal  lithotripsy.  On April 18, 1989,  the FDA approved  the  LithostarTM  for
mobile  lithotripsy.  On July 1, 1996,  the FDA approved a new higher  intensity
shock-head  system for the LithostarTM  which has since been installed in one of
the  Partnership's  LithostarsTM  and is  scheduled to be installed in the other
LithostarTM in 1999. Currently, the General Partner estimates that more than 400
LithostarTM systems are performing  lithotripsy  procedures in over 20 countries
throughout the world.  All components of the  LithostarTM  are  manufactured  by
Siemens, a diversified multinational company.

     The  LithostarTM was designed with a view towards  substantially  improving
early lithotripsy  technology.  See "Proposed Activities - Treatment Methods for
Kidney Stone Disease -  Extracorporeal  Shock-Wave  Lithotripsy."  Technological
improvements incorporated into the LithostarTM include an improved work station,
a  shock-wave  component  that has  eliminated  the need  for  both  water  bath
treatment and disposable  electrodes,  and an excellent stone  localization  and
imaging  system.  Based  upon  its  experience  in  its  affiliated  lithotripsy
ventures,  the General  Partner  believes that most patients can be treated with
the  LithostarTM  without  anesthesia  of any kind.  The  General  Partner  also
believes that LithostarsTM  upfitted with the higher intensity shock-head system
experience somewhat shorter treatment durations.

     Based  upon its  experience  with  over 30  LithostarsTM  in other  limited
partnerships  sponsored by the General Partner and its  Affiliates,  the General
Partner has found that the  LithostarTM  can fragment most kidney stones without
anesthesia,  cystoscopy or the insertion of ureteral  catheters.  Because of the
General Partner's belief in the superior imaging of the LithostarTM, the General
Partner believes that lithotripsy with the LithostarTM provides for treatment of
lower ureteral stones,  even impacted  stones,  thereby  rendering  ureteroscopy
practically obsolete as a treatment of first choice.



                                                        21
<PAGE>

The Coach and Trailer

     The  Partnership's  Coach and Trailer, each of which houses a  LithostarTM,
were acquired by the Partnership in 1991 and early 1998, respectively. The Coach
and the Trailer have each been completely  upfitted for the  LithostarTM and its
clinical  operations.  Service  for the Coach and the  Trailer is obtained on an
as-needed basis. The General Partner estimates that expenditures for maintenance
and repair have been  incurred at a rate of  approximately  $15,000 per year per
Unit.

Anticipated Partnership Expenditures

     The Partnership's  LithostarTM that has not been upgraded with the new high
intensity  shock  head,  is  scheduled  to  receive  such  upgrade in 1999 at an
estimated  cost of $75,000.  The General  Partner  anticipates  that the upgrade
process  will be brief  and will not  interfere  with the  Partnership's  normal
lithotripsy service. The Partnership's Coach is scheduled to be reconditioned in
1999 at an estimated cost of $50,000. The Partnership's  Trailer is scheduled to
be  reconditioned  in 2003 at an estimated cost of $65,000.  The  reconditioning
payments  would be paid to AK  Associates,  an Affiliate of the General  Partner
engaged in the selling  and  refurbishment  of medical  equipment  trailers  and
coaches.  See  "Compensation  and  Reimbursement  to the General Partner and its
Affiliates."  Reconditioning  typically takes six to eight weeks and consists of
removal and  reinstallation  of the  lithotripter,  replacement  of the interior
floors,  cabinets  and  wall  coverings,  exterior  body  work,  repainting  and
re-decaling  the exterior and service to the expanding wall slide- outs.  During
the time the Coach and Trailer are being  Reconditioned,  the  Partnership  will
likely rent a replacement  Mobile Lithotripsy System from the General Partner or
its Affiliates at an estimated per week rate of $8,750.  Any necessary  Coach or
Trailer  maintenance  is likely to be  performed  by an Affiliate of the General
Partner at commercially reasonable rates. See "Compensation and Reimbursement to
the General Partner and its Affiliates."

Acquisition of Additional Assets

     If in the  future the  General  Partner  determines  that it is in the best
interest of the  Partnership  to acquire (i) an  additional  Mobile  Lithotripsy
System  or (ii)  any  other  assets  related  to the  provision  of  lithotripsy
services,  the General Partner may, without the consent of the Limited Partners,
establish  reserves or borrow funds on behalf of the Partnership to acquire such
assets,  and may use  Partnership  assets and  revenues to secure and repay such
borrowings.  Any additional  borrowing by the Partnership will serve to increase
the risks associated with leverage.

Hospital Contracts

     The  Partnership  has  entered  into  Hospital  Contracts  with 8  Contract
Hospitals to operate the Mobile Lithotripsy  Systems at the Contract  Hospitals.
Most  of  the  Hospital   Contracts  have  an  initial  term  of  one  year  and
automatically  renew for successive  one-year  periods unless the Partnership or
the hospital  delivers to the other party written  notice of its decision not to
renew the agreement at least 60 days prior to the anticipated  termination date.
Four of the Hospital Contracts


                                                        22
<PAGE>

     are also  terminable  without  cause at any time by  either  party on short
notice, generally 90 days or less. The Contract Hospitals are:

AMI Brownsville Medical Center, Brownsville
Citizens Medical Center, Victoria
Doctors Regional Medical Center, Corpus Christi
Knapp Medical Center, Weslaco
McAllen Medical Center, McAllen
Mercy Regional Medical Center, Laredo
Spohn Hospital, Corpus Christi
Valley Baptist Medical Center, Harlingen

     The terms of certain  Hospital  Contracts  prohibit  the  Partnership  from
expanding  operations into certain areas of south Texas not currently  served by
the Partnership.

     The  Hospital  Contracts  require  each  hospital  to  provide  the  Mobile
Lithotripsy Systems with site pad space,  utility hookups,  nonphysician medical
personnel  and billing  and  accounting  services  in exchange  for the right to
collect a fee from each patient who  undergoes a  Lithotripsy  procedure at that
hospital. The General Partner is attempting to negotiate similar agreements with
additional hospitals or outpatient surgical centers located in south Texas.

     The  Partnership  or the hospital  charges a lithotripsy  technology fee to
each  patient  treated with a  LithostarTM  which is separate and apart from any
professional   fee  charged  by  the  physician  who  performs  the  lithotripsy
procedure.  The technology fee received from privately insured patients averages
approximately  $3,500 while the fee received from government program patients is
significantly  less.  There  is no  assurance  that  these  fee  levels  can  be
maintained as the  lithotripsy  fees charged by the Partnership or hospitals are
largely dependent upon the amount of reimbursement  private health care insurers
will allow for this  procedure.  In  addition,  most of the  Hospital  Contracts
provide that the fee charged to public program payors by the Partnership for use
of the lithotripter must at all times be equal to or less than the lowest amount
the  Partnership  charges any  privately  insured  patient.  See "Risk Factors -
Dependence on Insurance Reimbursement."

Management

     The  Partnership has entered into a management  agreement (the  "Management
Agreement") with the General Partner whereby the General Partner is obligated to
supervise and coordinate the management and  administration  of the operation of
the Mobile  Lithotripsy  Systems on behalf of the  Partnership in exchange for a
monthly management fee equal to the greater of 7.5%


                                                        23
<PAGE>

of Partnership  Cash Flow per month or $8,000 per month. See  "Compensation  and
Reimbursement to the General Partner and its Affiliates." The General  Partner's
services  under the  Management  Agreement  include  training  physicians in the
proper use of the LithostarsTM,  monitoring technological  developments in renal
lithotripsy  and  advising  the  Partnership  of these  developments,  arranging
education  programs  for  qualified  physicians  who  use the  LithostarsTM  and
providing  advertising,  billing,  accounts collection,  equipment  maintenance,
medical  supply  inventory  and  other  incidental  services  necessary  for the
efficient  operation of the Mobile  Lithotripsy  Systems.  Costs incurred by the
General Partner in performing its duties under the Management  Agreement are the
responsibility of the Partnership.  The General  Partner's  engagement under the
Management Agreement is as an independent contractor and neither the Partnership
nor its Limited Partners have any authority or control over the method or manner
in which the General Partner performs its duties under the Management Agreement.
The Management  Agreement is in the first 5-year renewal term and will be up for
a second renewal for an additional five-year term in 2001.  Thereafter,  it will
be  automatically  renewed  for an  additional  term  unless  terminated  by the
Partnership or the General Partner.

Employees

     The  Partnership  employs as full time  employees a total of two registered
technicians, two registered nurses and one driver.


                               THE GENERAL PARTNER

     General.  The General Partner of the Partnership is Lithotripters,  Inc., a
North Carolina corporation formed in November 1987 for the purpose of sponsoring
medical service limited partnerships. The General Partner was founded by William
R.  Jordan,  M.D.  and became a wholly owned  subsidiary  of Prime in 1996.  See
"Conflicts of Interest" and "Prior  Activities." The principal  executive office
of the  General  Partner is located at 2008  Litho  Place,  Fayetteville,  North
Carolina 28304, and its telephone number is (800) 682-7971.

     Management.  The  following  table  sets  forth the  names  and  respective
positions of the individuals  serving as executive officers and directors of the
General Partner,  many of whom were shareholders of the General Partner prior to
its  acquisition  by Prime  and/or are current  shareholders  and/or  management
personnel of Prime.

            Name                               Office
 
     Joseph Jenkins, M.D.               President, Chief Executive Officer
                                                   and Director
     Kenneth S. Shifrin                 Director
     W. Alan Terry                               Chief Financial Officer
     Cheryl Williams                    Vice President and Director
     Philip J. Gallina                  Secretary and Treasurer


                                                        24
<PAGE>


     Supervision  of  the  day-to-day   management  and  administration  of  the
Partnership is the  responsibility  of the General Partner.  The General Partner
itself is managed by a three-member  Board of Directors composed of Dr. Jenkins,
Mr. Shifrin and Ms. Williams.  The General Partner is a wholly-owned  subsidiary
of Prime.

     Descriptions  of the background of the executive  officers and directors of
the General Partner appear below.

     Joseph Jenkins, M.D. has been President of Prime since April 1996. From May
1990 until  December  1991,  Dr.  Jenkins  was a Vice  President  of the General
Partner and previously  practiced  urology in Washington,  North  Carolina.  Dr.
Jenkins has been  President of the General  Partner  since 1992 and was recently
elected to is Board of Directors. Dr. Jenkins is a board certified urologist and
is a founding  member,  past-president  and currently a Director of the American
Lithotripsy Society.

     Kenneth S.  Shifrin has been  Chairman of the Board and a Director of Prime
since  October 1989 and was recently  elected a Director of the General  Partner
following Prime's acquisition of all of the General Partner's stock. Mr. Shifrin
also has served in various  capacities with American  Physicians  Service Group,
Inc.  ("APS") since February  1985,  and is currently  Chairman of the Board and
Chief Executive Officer of APS.

     W. Alan Terry has been Chief Financial Officer of the General Partner since
1991. In August,  1986,  Mr. Terry joined The May  Department  Stores Company at
their  corporate  headquarters  in St.  Louis,  where he held several  financial
management  positions  until October,  1987,  when he was  transferred to one of
May's largest divisions, Caldor, Inc., as Vice President of Finance. He remained
in that capacity until June,  1990, when he became Chief  Operating  Officer for
the General Partner and served in that capacity until April 1996.

     Cheryl  Williams is a Director and Vice  President of the General  Partner.
Ms.  Williams  has been Chief  Financial  Officer,  Vice  President-Finance  and
Secretary of Prime since October 1989.  Ms. Williams was Controller of Fairchild
Aircraft  Corporation  from  August 1988  to  October 1989.  From  1985 to 1988,
Ms. Williams served as the Chief Financial Officer of APS Systems, Inc.

     Philip J.  Gallina  recently  became the  Secretary  and  Treasurer  of the
General Partner,  having  previously  served as a Vice President since 1989. Mr.
Gallina is a Certified Public Accountant  licensed in the state of Pennsylvania.
From 1980 through  February 1989, Mr. Gallina served as Plant Controller for the
Westinghouse  Motor Control and Enclosed  Control Product Lines.  Mr. Gallina is
also a Director, the Vice President,  the Treasurer and the Secretary of MedTech
Investments, Inc., the Sales Agent.



                                                        25
<PAGE>

                      COMPENSATION AND REIMBURSEMENT TO THE
                       GENERAL PARTNER AND ITS AFFILIATES

     The following  summary  describes the types and,  where  determinable,  the
estimated amounts of reimbursements, compensation and other benefits the General
Partner  and its  Affiliates  will  receive  in  connection  with the  continued
operation and management of the Partnership and the Mobile Lithotripsy  Systems.
None of such fees,  compensation and other benefits has been determined at arm's
length.  Except for the items set forth  below,  the  General  Partner  does not
expect to receive any distribution, fee, compensation or other remuneration from
the Partnership.  See "Business  Activities - Management and Administration" and
"Plan of Distribution."

     1.  Management  Fee.  Pursuant  to the  Management  Agreement,  the General
Partner has  contracted  with the  Partnership  to supervise the  management and
administration  of the day-to-day  operations of the  Partnership's  lithotripsy
business for a monthly fee equal to the greater of $8,000 or 7.5% of Partnership
Cash Flow per month. All costs incurred by the General Partner in performing its
duties under the Management  Agreement are the  responsibility  of, and are paid
directly  or  reimbursed  by,  the  Partnership.  The  General  Partner  is  the
management agent for various affiliated  lithotripsy ventures. As a consequence,
many  of  the  General  Partner's   employees  provide  various  management  and
administrative  services for numerous  ventures,  including the Partnership.  In
order to properly  allocate  the costs of the General  Partner's  employees  and
other overhead expenses among the entities for which they provide services, such
costs will be divided among all the ventures  based upon the relative  number of
patients  treated by each.  The  General  Partner  believes  that the sharing of
personnel and overhead costs among various entities results in significant costs
savings for the  Partnership.  The management fee for any given month is payable
on or before the 30th day of the next succeeding month. The Management Agreement
is in its first  five-year  renewal term which expires in 2001.  The  Management
Agreement  will be  automatically  renewed for up to two  additional  successive
five-year  terms  unless it is  earlier  terminated  by the  Partnership  or the
General Partner. The General Partner is reimbursed by the Partnership for all of
its out-of- pocket costs  associated  with the operation of the  Partnership and
the Mobile Lithotripsy Systems, and the Partnership will pay or reimburse to the
General  Partner  all  expenses  related  to this  Offering.  No  other  fees or
compensation  will be  payable to the  General  Partner  or its  Affiliates  for
managing the  Partnership  other than the  management fee payable to the General
Partner as provided in the Management  Agreement.  The Partnership may, however,
contract with the General  Partner or its Affiliates to render other services or
provide  materials to the Partnership  provided that the  compensation is at the
then prevailing rate for the type of services and/or materials provided.

     2.  Partnership  Distributions.  In its capacity as general  partner of the
Partnership,  the General  Partner is  entitled  its  distributable  share (20%,
before  dilution)  of  Partnership  Cash Flow,  Partnership  Sales  Proceeds and
Partnership  Refinancing Proceeds as provided by the Partnership Agreement.  The
General Partner also owns a 26.5% (before  dilution) limited partner interest in
the  Partnership,  and  Affiliates  of the General  Partner own an aggregate 13%
limited  partner  interest  in the  Partnership.  Both  groups are  entitled  to
Distributions on account

                                                        26
<PAGE>

     of such  interest.  See  "Summary of the  Partnership  Agreement - Profits,
Losses and Distributions" and the Partnership Agreement attached as Appendix B.

     3. Sales Commissions.  The Sales Agent, a wholly-owned subsidiary of Prime,
has entered into a Sales Agency Agreement with the Partnership pursuant to which
the Sales  Agent has  agreed  to sell the Units on a "best  efforts"  any or all
basis.  As  compensation  for its  services,  the  Sales  Agent  will  receive a
commission  equal to $250 for each Unit sold (up to an aggregate of $5,000).  If
the  offering  is  successful,  the Sales Agent will also be  reimbursed  by the
Partnership for its out-of-pocket expenses associated with its sale of the Units
in an amount not to exceed $7,500.  See "Plan of Distribution" and "Conflicts of
Interest."

     4.  Reconditioning of Coach and Trailer. It is anticipated that the General
Partner will cause the Partnership to contract with AK Associates,  an Affiliate
of the General Partner,  to recondition the  Partnership's  Coach and Trailer in
1999 and 2003,  respectively,  at an  estimated  cost of  $50,000  and  $65,000,
respectively. In addition, it is anticipated that the General Partner will cause
the  Partnership to contract with the General  Partner or its affiliates to rent
"loaner"  Mobile  Lithotripsy  Systems during the time the Coach and Trailer are
being  reconditioned  at an  estimated  per  week  price  of  $8,750  per  unit.
Reconditioning  is  expected  to take six to  eight  weeks.  Accordingly,  it is
anticipated  that the  Partnership  will pay an  aggregate  of  $122,500  to the
General  Partner and its  Affiliates  for loaner units over the next four years.
The Partnership may require  additional loaner units or rental time in the event
any of the Partnership's Mobile Lithotripsy Systems experience  substantial down
time for other  maintenance or repairs.  See "Business  Activities - Anticipated
Partnership Expenditures."

     5. Loans.  The General Partner or its Affiliates will also receive interest
on loans, if any, made by them to the Partnership.  See "Conflicts of Interest."
Neither the General Partner nor any of its Affiliates are, however, obligated to
make loans to the  Partnership.  While the General  Partner does not  anticipate
that it would cause the Partnership to incur indebtedness  unless cash generated
from  Partnership  operations  were at the time expected to enable  repayment of
such loan in accordance with its terms,  lower than anticipated  revenues and/or
greater than anticipated  expenses could result in the Partnership's  failure to
make  payments  of  principal  or  interest  when due under  such a loan and the
Partnership's  equity being reduced or  eliminated.  In such event,  the Limited
Partners could lose their entire investment.

                              CONFLICTS OF INTEREST

     The operation of the Partnership  involves  numerous  conflicts of interest
between the Partnership and the General Partner and its Affiliates.  Because the
Partnership is operated by the General Partner,  such conflicts are not resolved
through arm's length  negotiations,  but through the exercise of the judgment of
the General Partner consistent with its fiduciary  responsibility to the Limited
Partners and the Partnership's  investment objectives and policies.  The General
Partner,  its Affiliates and employees of the General Partner will in good faith
continue to attempt to resolve

                                                        27
<PAGE>

     potential  conflicts  of  interest  with the  Partnership,  and the General
Partner  will act in a manner  that it  believes  to be in or not opposed to the
best interests of the Partnership.

     The General  Partner and its Affiliates  will receive  management  fees and
broker-dealer  sales  commissions in connection with the business  operations of
the  Partnership  and the sale of the  Units  that  will be paid  regardless  of
whether any sums hereinafter are distributed to Limited  Partners.  None of such
fees,   compensation   and  benefits  has  been   determined   by  arm's  length
negotiations. In addition, the Partnership may contract with the General Partner
or  its  Affiliates  to  render  other  services  or  provide  materials  to the
Partnership  provided that the  compensation  is at the then prevailing rate for
the type of services  and/or  materials  provided.  It is  anticipated  that the
General Partner and/or its Affiliates will receive fees for  reconditioning  the
Partnership's  Coach and Trailer  and rental  payments  in  connection  with the
provision of loaner  Mobile  Lithotripsy  Systems  during the time the Coach and
Trailer are being reconditioned.  The General Partner will also receive interest
on  loans,  if  any,  it  makes  to  the  Partnership.   See  "Compensation  and
Reimbursement to the General Partner and its Affiliates."

     The General Partner and its Affiliates will devote as much of their time to
the business of the  Partnership  as in their  judgment is reasonably  required.
Principals of the General  Partner may have  conflicts of interest in allocating
management time,  services and functions among their various existing and future
business activities in which they are or may become involved.  See "Competition"
and "Prior  Activities."  The General  Partner  believes it and its  Affiliates,
together,  have  sufficient  resources  to be capable of fully  discharging  the
General Partner's and its Affiliates'  responsibilities to the Partnership.  The
General Partner and its Affiliates may engage for their own account,  or for the
account of others,  in other business  ventures,  related to medical services or
otherwise, and neither the Partnership nor the holders of any of the Units shall
be  entitled  to any  interest  therein.  The General  Partner,  its  Affiliates
(including affiliated limited partnerships) and employees of the General Partner
engage  in  medical  service  activities  for  their own  accounts.  See  "Prior
Activities." The General Partner may serve as a general partner of other limited
partnerships  that are similar to the  Partnership and does not intend to devote
its entire financial,  personnel and other resources to the Partnership.  Except
as provided by law,  none of such  entities or their  respective  Affiliates  is
prohibited  from  engaging  in  any  business  or  arrangement  that  may  be in
competition  with the  Partnership.  Several  Affiliates of the General  Partner
currently operate separate lithotripsy services businesses in Texas. The General
Partner is planning  other  limited  partnership  offerings  that would  operate
lithotripsy businesses in other states. See "Competition."

     The Sales Agent is MedTech Investments,  Inc., which is an Affiliate of the
General  Partner.  Because of the Sales  Agent's  affiliation  with the  General
Partner,  there  are  conflicts  in the  Sales  Agent's  performance  of its due
diligence  responsibilities  under the  federal  securities  laws.  See "Plan of
Distribution."

     The interests of the Limited Partners have not been separately  represented
by independent counsel in the formulation of the transactions  described herein.
The attorneys and accountants  who have performed and will perform  services for
the Partnership were retained by


                                                        28
<PAGE>

     the General Partner, and have in the past performed and are expected in the
future to perform similar services for the General Partner, and Prime.

                 FIDUCIARY RESPONSIBILITY OF THE GENERAL PARTNER

     The General  Partner is accountable  to the  Partnership as a fiduciary and
consequently must exercise good faith in handling Partnership affairs. This is a
rapidly  developing  and changing area of the law and Limited  Partners who have
questions concerning the duties of the General Partner should consult with their
counsel. Under the Partnership Agreement, the General Partner and its Affiliates
have no liability to the  Partnership or to any Partner for any loss suffered by
the  Partner  ship that  arises out of any  action or  inaction  of the  General
Partner or its  Affiliates  if the General  Partner or its  Affiliates,  in good
faith,  determined  that such course of conduct was in the best  interest of the
Partnership  and such course of conduct did not constitute  gross  negligence or
willful  misconduct  of the  General  Partner  or its  Affiliates.  Accordingly,
Limited  Partners have a more limited right of action than they otherwise  would
absent the  limitations  set forth in the  Partnership  Agreement.  The  General
Partner and its Affiliates  will be indemnified by the  Partnership  against any
losses, judgments,  liabilities,  expenses and amounts paid in settlement of any
claims sustained by them in connection with the  Partnership,  provided that the
same were not the result of gross  negligence or willful  misconduct on the part
of the  General  Partner  or its  Affiliates.  Insofar  as  indemnification  for
liabilities under the Securities Act may be permitted to persons controlling the
Partnership  pursuant to the  foregoing  provisions,  the  Partnership  has been
informed that in the opinion of the SEC such  indemnification  is against public
policy as expressed in the Securities Act and therefore is unenforceable.

                                   COMPETITION

     Many   competing   fixed-site   and   mobile   extracorporeal    shock-wave
lithotripters  are  currently  operating  in and around the  Service  Area.  The
competing  lithotripsy  service providers generally have existing contracts with
hospitals,  or are operated by hospitals  themselves.  The following  discussion
identifies  the existing  competitors in the Service Area, to the best knowledge
of the General Partner.

Affiliated Competition

     The Partnership faces competition from  lithotripters  placed in service in
Texas, and, to a lesser extent,  from lithotripters  located in adjacent states,
including  lithotripters owned by other partnerships affiliated with the General
Partner. The General Partner has organized the following limited partnerships in
Texas:  (i) Texas  Lithotripsy  Limited  Partnership II L.P. ("Texas II"), which
operates  primarily  in the Fort  Worth  area;  (ii) Texas  Lithotripsy  Limited
Partnership  III L.P.,  which  operates  in the San  Antonio  area;  (iii) Texas
Lithotripsy  Limited Partnership IV, L.P. ("Texas IV"), which operates primarily
in the Dallas area; (iv) Texas Lithotripsy Limited Partnership V, L.P.,


                                                        29
<PAGE>

     which operates primarily in northwestern  Texas; and (iv) Texas Lithotripsy
Limited  Partnership VI L.P.,  which operates  primarily in the Austin and Round
Rock areas.  The General Partner has also organized  Fayetteville  Lithotripters
Limited  Partnership-Louisiana  I, which  operates  throughout  Louisiana and in
Beaumont, Texas, and Fayetteville Lithotripters Limited  Partnership-Arkansas I,
which operates throughout Arkansas and northeast Texas. Another Affiliate of the
Partnership,  Texas  ESWL/Laser  Lithotripter,  Ltd.  ("ESWL")  provides  mobile
lithotripsy services in certain areas of Texas. Texas II, Texas IV and ESWL will
merge as of January 1, 1999,  and the  surviving  entity will  attempt to expand
operations  outside  the  service  areas  currently  served  by the  constituent
partnerships. Although the General Partner anticipates that the Partnership will
continue to operate  primarily in the Service Area, the actual itinerary for the
Mobile Lithotripsy System is expected to be influenced by the number of patients
in  particular  areas  and pad site  arrangements  with  various  hospitals  and
outpatient  surgical  centers.  See  "Business  Activities  -  Operation  of the
LithostarTM Mobile System."
Other Competition

     Several  hospitals and other  facilities in the Service Area have access to
lithotripters which are in direct competition with the Partnership.  In McAllen,
McAllen  Regional  Medical  Center  operates  a  fixed-base   Dornier  unit.  In
Edinburgh,  Bruce  Enterprises  provides  a  transportable  lithotripter  (brand
unknown) at Edinburgh Hospital. In Alice, Alice Physicians and Surgeons Hospital
operates a Medstone unit. Other hospitals,  ambulatory  surgery centers or other
facilities may offer extracorporeal shock-wave lithotripsy services of which the
General Partner is not aware.

     The terms of certain  Hospital  Contracts  prohibit  the  Partnership  from
expanding  operations into certain areas of south Texas not currently  served by
the Partnership.

     Other  hospitals in the Service Area served by the  Partnership may operate
lithotripters which are not extracorporeal  shock-wave  lithotripters but rather
use lasers or are electrohydraulic  lithotripters.  The General Partner believes
both these machines are qualitatively inferior to the Partnership's LithostarsTM
because  the  machines  are  limited  to  treatment  of stones in the ureter and
because  anesthesia is required prior to treatment.  The LithostarTM can be used
on stones in  locations  other  than the ureter and no  anesthesia  is  required
generally.  See  "Proposed  Activities -  Treatment  Methods  for  Kidney  Stone
Disease."

     The  General  Partner  is  generally   unfamiliar  with  the  cost  of  the
lithotripsy  procedures  offered by the Partnership's  competitors.  The General
Partner  believes  the  Partnership  has  a  competitive   advantage  over  many
competitors  because the LithostarTM is  technologically  superior to many other
lithotripters.  This  competitive  advantage  is  further  enhanced  by  Litho's
expertise in training physicians in the low-intensity lithotripsy technique. See
"Proposed Activities - Description of the LithostarTM."

     No assurances can be given that new competing  lithotripsy clinics will not
open in the future or that  innovations in  lithotripters or other treatments of
kidney stone disease will not


                                                        30
<PAGE>

     make the LithostarTM  competitively  obsolete. See "Risk Factors-Operating
Risks - Technological  Obsolescence."  In addition,  the General Partner and its
Affiliates are not restricted from engaging in lithotripsy ventures unassociated
with the Partnership which may compete with the Partnership.

     Siemens is under no obligation to the General Partner or the Partnership to
refrain  from  selling  LithostarTM  systems to  urologists,  hospitals or other
persons for use in Texas or elsewhere.  In addition,  several medical  equipment
manufacturers are expected to offer  lower-priced  lithotripters for sale, which
could  dramatically  increase the number of  lithotripters in the United States,
increase competition for lithotripsy  procedures and create downward pressure on
the prices the  Partnership  can charge for its services.  Lithotripters  can be
obtained from manufacturers other than Siemens.  The General Partner is familiar
with many of the lithotripters  offered by other manufacturers and believes that
while some may be offered for a lower purchase price than the LithostarTM, their
higher operating costs, particularly with respect to electrode replacement costs
not present with the LithostarTM,  make them more expensive than the LithostarTM
in the long  run.  Potential  competitors  also  have  access  to newer and less
expensive  lithotripters,  including  transportable  models which are capable of
more  efficiently  serving  multiple  sites.  Many potential  competitors of the
Partnership,  including hospitals and medical centers, have financial resources,
staffs and facilities substantially greater than those of the Partnership and of
the General Partner.

                                   REGULATION

Federal Regulation

     The  Partnership  is subject to regulation at the federal,  state and local
level. An adverse review or  determination by certain  regulatory  organizations
(federal,  state or private) may result in improvement,  loss of  reimbursement,
fines or  exclusion  from  participation  in  Medicare or  Medicaid.  Therefore,
adverse reviews of the Partnership  operations at any of the various  regulatory
levels may adversely affect the operations and profitability of the Partnership.

     Reimbursement.  The Partnership is subject to federal government  oversight
because the Partnership will seek reimbursement for its services to patients who
are beneficiaries of the Medicare and Medicaid programs.  Medicare reimbursement
policies are  statutorily  created and are regulated by the federal  government.
Currently, the Medicare program pays for renal lithotripsy services under Part A
(inpatient  hospital  service) and Part B (outpatient  and  physician  services)
benefits to the beneficiary.

     Medicare has adopted a  prospective  payment,  diagnostic-related  grouping
("DRG") based reimbursement system for Part A inpatient hospital services. A DRG
has been  established for  extracorporeal  shock wave  lithotripsy  services for
renal kidney stones.  The value of the DRG, and thus the amount of reimbursement
payable  for  the  nonprofessional  service  (nonphysician)   component  of  the
lithotripsy  service,  is adjusted for various factors including,  among others,
whether the  facility is located in an urban area,  local labor cost indices and
case-mix for the particular

                                                        31
<PAGE>

     hospital or other  facility at which the service is provided.  All of these
factors are subject to periodic  recalculation  and change depending upon events
outside the control of the  Partnership.  The General Partner  believes that the
Partnership's  lithotripsy procedures are not subject to the current DRG program
because the DRG program  applies only to inpatient  procedures,  and lithotripsy
procedures can be performed on an outpatient basis for most patients.

     The Balanced  Budget Act of 1997  required  HCFA to establish a prospective
payment system for outpatient  procedures.  HCFA issued proposed  regulations on
September  8,  1998.  HCFA  proposes  a  base  rate  of  $2,612  for  outpatient
lithotripsy  procedures,  which includes anesthesia and sedation,  equipment and
supplies  necessary  for the  procedure,  but  does  not  include  the  treating
physician's  professional  fee.  The base rate is  subject  to  adjustment  in a
fashion similar to the adjustments for inpatient  reimbursement discussed in the
preceding paragraph.  The proposed regulations state HCFA plans to implement the
outpatient  prospective  payment system sometime after January 1, 2000 (although
the Balanced Budget Act  contemplated  implementation  by January 1,  1999). The
General  Partner  believes  that  implementation  of the proposed  base rate for
lithotripsy  procedures  will  have  an  adverse  effect  on  the  Partnership's
revenues.

     The General  Partner may make the Mobile  Lithotripsy  System  available at
ambulatory surgery centers.  Proposed HCFA rules issued on June 12, 1998 setting
the ambulatory surgery center rate for various  procedures  include  lithotripsy
among those procedures approved for Medicare  reimbursement.  While the proposed
rules had a target  effective  date of October 1, 1998,  the effective  date has
been  postponed  indefinitely  for reasons  unrelated to  lithotripsy  coverage.
However,  the proposed  rules'  commentary  discusses the history of attempts by
HCFA several years ago to authorize  Medicare  reimbursement  for lithotripsy at
ambulatory  surgery centers.  These attempts (in 1990 and 1991) were enjoined by
federal  courts in  litigation  initiated by the American  Lithotripsy  Society,
which  challenged  the  reimbursement  rates  proposed by HCFA ($812 in 1990 and
$1,150 in 1991).  The  proposal  for  reimbursement  contained  in the June 1998
proposed rules assigns a Medicare  reimbursement  rate of $2,107 for lithotripsy
if the procedure is performed at an  ambulatory  surgery  center.  Whether these
proposed  rules will become  effective to authorize  Medicare  reimbursement  at
ambulatory  surgery  centers  and,  if they do  become  effective,  whether  the
proposed  reimbursement  rate will remain  unchanged,  is unknown to the General
Partner.

     HCFA's rates under the proposed  outpatient  prospective payment system and
ambulatory  surgery center  reimbursement  are lower than the General  Partner's
typical charge for the procedure.  Medicare  reimbursement is not be expected to
constitute  more than  one-third of the  Partnership's  revenues.  However,  the
Medicare  program  has  become  an  industry  leader  in  setting  reimbursement
standards which influence private insurance programs. Therefore,  implementation
of the proposed  outpatient  prospective  payment  system or ambulatory  surgery
center  reimbursement may negatively  affect  reimbursement by private insurance
programs, which could have a material adverse effect on Partnership revenues.

     The physician service (Part B) Medicare reimbursement for renal lithotripsy
is determined using Resource Based-Relative Value Scales ("RB-RVS").  The system
includes

                                                        32
<PAGE>

     limitations  on future  physician  reimbursement  increases  tied to annual
expenditure   targets  legislated   annually  by  Congress  or  set  based  upon
recommendation  of the  Secretary  of the U.S.  Department  of Health  and Human
Services. Medicare has in the past, with regard to other Part B services such as
cataract implant surgery,  imposed significant reductions in reimbursement based
upon changes in technology.  HCFA has produced a lengthy report which  concludes
that professional fees for lithotripsy are overvalued. Thus, future decreases in
reimbursement are probable.

     The Medicaid program in Texas is jointly sponsored by the federal and state
governments  to reimburse  service  providers for medical  services  provided to
Medicaid recipients,  who are primarily the indigent. The Texas Medicaid program
currently provides  reimbursement for lithotripsy services. The federal Personal
Responsibility  and Work Opportunity  Reconciliation  Act of 1996 requires state
health plans, such as the Texas Medicaid program, to limit Medicaid coverage for
certain otherwise  eligible  persons.  The General Partner does not believe this
legislation  significantly  impacts the  Partnership's  revenues.  In  addition,
federal regulations permit state health plans to limit the provision of services
based upon such criteria as medical  necessity or other  criteria  identified in
utilization  or medical  review  procedures.  The General  Partner does not know
whether the Texas Medicaid program has taken or will take such steps.

     Self-Referral  Restrictions.  Health care entities which seek reimbursement
for services  covered by Medicare or Medicaid are subject to federal  regulation
restricting  referrals by certain  physicians.  Congress has passed  legislation
prohibiting   physician   self-referral  of  patients  for  "designated   health
services",  which include inpatient and outpatient  hospital services (42 U.S.C.
Section   1395nn)("Stark  II").   Lithotripsy  services  were  not  specifically
identified  as  a  designated  health  service  by  this  legislation,  but  the
prohibition  includes  any service  which is provided  to an  individual  who is
registered  as  an  inpatient  or  outpatient  of  a  hospital   under  proposed
regulations discussed below. Lithotripsy services provided by the Partnership to
Medicare and Medicaid  patients  are billed by the  contracting  hospital in its
name and under its Medicare and Medicaid program provider numbers.  Accordingly,
these  lithotripsy  services would likely be considered  inpatient or outpatient
services under Stark II.

     Following  the  passage of the Stark II  legislation  effective  January 1,
1995,  the  General  Partner  determined  that the  statute did not apply to the
Partnership's lithotripsy services. Stark II applies only to ownership interests
in  the  entity  that  "furnishes"  the  designated  health  care  service.  The
physician-investors  and the Partnership will not have an ownership  interest in
any provider  hospitals which offer the lithotripsy  services to the patients on
an inpatient or outpatient basis. See 42 U.S.C.Section 1395nn(a)(1)(A). Thus, by
referring a patient to a hospital offering the service, the  physician-investors
will not be making a referral to an entity in which they  maintain an  ownership
interest for purposes of the application of Stark II.

     This interpretation  adopted by the General Partner was consistent with the
informal view of the General  Counsel' Office of the U.S.  Department of Health
and Human Services.  Based upon this reasonable  interpretation  of Stark II, by
referring a patient to a hospital furnishing the outpatient lithotripsy services
"under arrangements" with the Partnership, a physician investor in the

                                                        33
<PAGE>

Partnership  is not making a referral to an entity (the hospital) in which he or
she has a financial relationship.

     On January 9, 1998, the Health Care Financing  Administration ("HCFA"), the
federal agency  responsible for administering  the Medicare  program,  published
proposed  regulations  interpreting the Stark II statute (the "Proposed Stark II
Regulations").  The  Proposed  Stark  II  Regulations  and  HCFA's  accompanying
commentary  apply  the  physician  referral  prohibitions  of  Stark  II to  the
Partnership's   typical  practice  of  contracting  "under   arrangements"  with
hospitals for treatment and billing of Medicare and Medicaid patients. Under the
Proposed Stark II Regulations,  physician  Limited Partner referrals of Medicare
and Medicaid patients to contracting  hospitals would be prohibited  because the
Partnership is regarded as an entity that  "furnishes"  inpatient and outpatient
hospital services. HCFA, however, acknowledges in its commentary to the Proposed
Stark II Regulations that physician  overutilization  of lithotripsy is unlikely
and  specifically  solicits  comments on whether  there  should be a  regulatory
exception for lithotripsy. HCFA has received a substantial volume of comments in
support of a regulatory  exception for lithotripsy.  HCFA  representatives  have
informally acknowledged to representatives of the General Partner that some form
of regulatory relief for lithotripsy may be forthcoming;  however, no assurances
can be made that such will be the case.

     At the present time the Stark II regulations  are only  proposed,  and HCFA
has solicited  public  comments on them. The General Partner cannot predict when
final regulations will be issued or the substance of the final regulations,  but
the interpretive  provisions of the Proposed Stark I  Regulations may be viewed
as HCFA's interim position until final regulations are issued.

     If the Proposed Stark II Regulations become final in their present form (or
if, in the  meantime,  a reviewing  court adopts  their  positions as the proper
interpretation  of the Stark II statute),  then the Partnership may be given the
opportunity to bring its operations into compliance.

     HCFA's adoption of the current  Proposed Stark II Regulations as final or a
reviewing  court'  interpretation  of the Stark II statute in  reliance  on the
Proposed  Stark  II  Regulations  and in a  manner  adverse  to the  Partnership
operations  would mean that the Partnership and its physician  Limited  Partners
are in violation of Stark II. The General Partner does not believe either of the
above  instances  will occur;  however,  no  assurances  can be made.  In either
instance, however, the Partnership and/or the physician Limited Partners may not
be permitted the  opportunity  to  restructure  operations  and thereby avoid an
obligation to refund any amounts  collected from Medicare and Medicaid  patients
in violation of the statute.  Further, under these circumstances the Partnership
and physician  Limited Partners may be assessed with substantial  civil monetary
penalties  and/or exclusion from providing  services  reimbursed by Medicare and
Medicaid.

     The General Partner will continue to work through the American  Lithotripsy
Association to encourage the adoption of  legislation  supportive of urologists'
ability to  lawfully  maintain  ownership  interests  in ventures  that  provide
lithotripsy services to all of their patients. Additionally, the General Partner
will continue to carefully review the Proposed Stark II Regulations

                                                        34
<PAGE>

     and accompanying  HCFA commentary,  and explore other  alternative plans of
operations  that would allow the Partnership to operate in compliance with Stark
II and its final regulations.

     Fraud  and  Abuse.  The  provisions  of the  federal  Social  Security  Act
addressing illegal remuneration (the "Anti-Kickback Statute") prohibit providers
and  others  from  soliciting,   receiving,  offering  or  paying,  directly  or
indirectly,  any  remuneration  in return  for either  making a  referral  for a
Medicare,  Medicaid or CHAMPUS  covered  service or ordering,  arranging  for or
recommending any such covered service.  Violations of the Anti-Kickback  Statute
may be  punished by a fine of up to $25,000 or  imprisonment  for up to five (5)
years,  or both. In addition,  violations may be punished by  substantial  civil
penalties  and/or exclusion from the Medicare and Medicaid  programs.  Regarding
exclusion,  the Office of Inspector  General ("OIG") of the Department of Health
and Human  Services may exclude a provider  from  participation  in the Medicare
program for a 5-year  period upon a finding that the  Anti-Kickback  Statute has
been  violated.  After OIG  establishes a factual basis for excluding a provider
from the  program,  the  burden  of proof  shifts to the  provider  to prove the
Anti-Kickback Statute has not been violated.\

     The  Limited   Partners  are  to  receive  cash   Distributions   from  the
Partnership.  Since it is anticipated  that some of the Limited Partners will be
physicians  or other  entities in a position  to refer and  perform  lithotripsy
services using Partnership  equipment and personnel,  such  Distributions  could
come under scrutiny under the  Anti-Kickback  Statute.  The Third Circuit United
States Court of Appeals has held that the  Anti-Kickback  Statute is violated if
one  purpose  (as  opposed  to the  primary or sole  purpose)  of a payment to a
provider is to induce referrals.  U.S. v. Greber, 760 F.2d 68 (1985). The Greber
case was followed by the United  States Court of Appeals for the Ninth  Circuit,
United States v. Kats, 871 F.2d 105 (9th Cir. 1989),  and cited favorably by the
First  Circuit  in United  States v. Bay State  Ambulance  and  Hospital  Rental
Service, Inc., 874 F.2d 20 (1st Cir. 1989). Since none of these cases involved a
lithotripsy  syndication  or joint  venture such as the  Partnership,  it is not
clear how a court  would  apply  these  holdings  to the facts  related  to this
Offering.

     The OIG has indicated  that it is giving  increased  scrutiny to healthcare
joint ventures involving  physicians and other referral sources. In May 1989, it
published a Special Fraud Alert that outlined questionable features of "suspect"
joint ventures,  including some features which may be common to the Partnership.
While OIG Special  Fraud  Alerts do not  constitute  law,  they are  informative
because  they  reflect the general  views of the OIG as a  healthcare  fraud and
abuse investigator and enforcer.

     The OIG has published  regulations which protect certain  transactions from
scrutiny under the Anti-Kickback Statute (the "Safe Harbor" regulations). A Safe
Harbor, if complied with fully, will exempt such activity from prosecution under
the Anti-Kickback Statute.  However, the preamble to the Safe Harbor regulations
states that the failure of a particular business  arrangement to comply with the
regulations does not determine whether or not the arrangement violates the Anti-
Kickback  Statute  because the regulations do not themselves make any particular
conduct illegal.

                                                        35
<PAGE>

     Any conduct that could be construed to be illegal after the promulgation of
the Safe Harbor  regulations would have been illegal prior to the publication of
the regulations.

     Prospective Limited Partners should note that the anticipated ownership and
operations  of the  Partnership  may not  fully  comply  with any  Safe  Harbor;
however,  the  preamble  to the Safe  Harbor  regulations  makes  clear that the
failure to comply with a Safe Harbor does not mean the arrangement  violates the
Anti-Kickback  Statute.  Although a separate  Safe Harbor was not adopted,  HCFA
noted  in  its  commentary  to  the  Safe  Harbor  regulations  that  additional
protection may be merited for situations where a physician sees a patient in his
or her own  office,  makes a  referral  to an  entity  in which he or she has an
ownership  interest and performs the service for which the referral is made.  In
such  cases,  Medicare  makes a  payment  to the  facility  for the  service  it
furnishes,  which may result in a profit  distribution  to the  physician.  HCFA
noted that, with respect to the physician' professional fee, such a referral is
simply a referral to oneself, and that in such situations, both the professional
service fee and the profit  distribution  from the associated  facility fee that
are  generated  from the referral may warrant  protection.  HCFA stated that its
primary  concern  regarding  the  above  referral  situation  was the  investing
physician' ability to profit from any diagnostic testing that is generated from
the services he or she  performs.  The potential  for  overutilization  posed by
referrals  for  diagnostic  services  is not  present  to the same  degree  with
therapeutic  services such as lithotripsy  where the necessity for the treatment
can be objectively determined;  i.e., a renal stone can be definitely determined
before treatment.

     The applicability of the Anti-Kickback  Statute to physician investments in
health care businesses to which they refer patients and which do not qualify for
a Safe Harbor is  unclear.  In the only case in which the OIG has  attempted  to
exercise the civil exclusion  remedy in the context of a  physician-owned  joint
venture,  The Hanlester  Network,  et al. v. Shalala,  the Ninth Circuit for the
United States Court of Appeals (the "Court") held that the Anti-Kickback Statute
is  violated  when a person  or  entity  (a) knows  that the  statute  prohibits
offering  or  paying  remuneration  to  induce  referrals  and  (b)  engages  in
prohibited  conduct  with the specific  intent to violate the law.  Although the
Court  upheld a lower court ruling that the joint  venture in question  violated
the Anti-Kickback Statute vicariously through the knowing and willful actions of
one of its agents,  who was acting outside the parameters of the joint venture'
offering  documents,  the  Court  concluded  there was not  sufficient  evidence
indicating  that a return on investment to physicians or other  investors in the
joint venture could on its own constitute an "offer or payment" of  remuneration
to make  referrals.  The Court also stated that since  profit  distributions  in
Hanlester  were made  based on each  investor'  ownership  share and not on the
volume of referrals,  the fact that large referrals by investors would result in
potentially high investment  returns did not, standing alone,  cause a violation
of the Anti- Kickback Statute.

     The Health Insurance  Portability and  Accountability  Act of 1996 directed
the OIG to respond to requests for advisory opinions regarding the effect of the
fraud and abuse statute on proposed business  transactions.  The General Partner
has not requested the OIG to review this Offering and, to the best  knowledge of
the General Partner, the OIG has not been asked by anyone to review offerings of
this type. Thus,  federal  regulatory  authorities  could take the position that
this

                                                        36
<PAGE>

     Offering is a means to illegally  influence  the  referral  patterns of the
prospective  physician  Limited  Partners.  Because there is no legal  precedent
interpreting  circumstances  identical  to these  facts,  it is not  possible to
predict how this issue may be resolved if litigated.

     Whenever an offering of ownership  interests  is made  available to persons
with the potential to refer patients for services,  there is a possibility  that
the OIG, HCFA or other  government  officials may question whether the ownership
interests  are being  provided in return for or to induce  referrals  by the new
owners.  Remuneration,  which  government  officials  have said can  include the
provision  of an  opportunity  to invest in a facility to which a person  refers
patients for services,  under such facts may be challenged by the  government as
constituting a violation of the Anti-Kickback  Statute.  Whether the offering of
ownership interests to investors who may refer patients to the Partnership might
constitute  a violation of this law must be  determined  in each case based upon
the specific facts involved.  The various mechanisms in place to avoid providing
a  financial  benefit to  prospective  Limited  Partners  for any  referrals  of
patients  (including  the  requirement  that all  distributions  of  earnings to
Limited Partners be made in proportion to their investment  interest),  the fact
lithotripsy  is a  therapeutic  treatment  the need of which can be  objectively
determined,  and the existence in the General  Partner'  view of valid business
reasons  to engage in this  transaction,  form the basis in part of the  General
Partner' belief that this Offering is in compliance with legal requirements.

     The General Partner of the Partnership  intends for all business activities
and operations of the Partnership to conform in all respects with all applicable
anti-kickback  statutes (federal or state). The General Partner does not believe
that  the   Partnership'   operations   violate  the   Anti-Kickback   Statute.
Consequently, the General Partner does not believe that strict compliance with a
Safe Harbor is necessary for its operations. No assurance can be given, however,
that  the  proposed  activities  of the  Partnership  will not be  reviewed  and
challenged by regulatory  authorities empowered to do so, or that if challenged,
the Partnership will prevail.

     If the  activities  of the  Partnership  were  determined  to violate these
provisions, the Partnership,  the General Partner, officers and directors of the
General  Partner,  and each Limited Partner could be subject,  individually,  to
substantial  monetary  liability,  felony prison sentences and/or exclusion from
participation in Medicare, Medicaid and CHAMPUS. For the reasons outlined above,
it is the opinion of the General  Partner that the operations of the Partnership
do not violate the  Anti-Kickback  Statute.  A prospective  Limited Partner with
questions   concerning  these  matters  should  seek  advice  from  his  or  her
independent counsel.

     False Claims Statutes. The Partnership is also subject to federal and state
laws governing the submission of claims for reimbursement.  These laws generally
prohibit an individual or entity from knowingly and willfully presenting a claim
(or causing a claim to be  presented)  for payment  from  Medicare,  Medicaid or
other third party payors that is false or fraudulent.  The standard for "knowing
and willful"  includes conduct that amounts to a reckless  disregard for whether
accurate  information is presented by claims  processors.  Penalties under these
statutes  include  substantial  civil and  criminal  fines,  exclusion  from the
Medicare program and imprisonment. One

                                                        37
<PAGE>


     of the most  prominent of these laws is the federal False Claims Act, which
may be  enforced  by the federal  government  directly,  or by a qui tam private
plaintiff on the government'  behalf.  Under the federal False Claims Act, both
the  government  and the private  plaintiff,  if  successful,  are  permitted to
recover substantial monetary penalties and judgments, as well as an amount equal
to three times actual  damages.  In recent cases,  some qui tam plaintiffs  have
taken the position that violations of the  Anti-Kickback  provisions  (discussed
above) and Stark II (discussed above) should also be prosecuted as violations of
the federal False Claims Act. The Partnership cannot assure that the government,
upon audit or review, would not take the position that billing errors,  employee
misconduct  or  violations of other  federal  statutes,  should they occur,  are
violations of the federal False Claims Act or similar statutes.

     New  Legislation.  The General  Partner is not aware of any bill  currently
before  Congress which, if enacted into law, would have an adverse effect on the
Partnership'  operations  in  a  fashion  similar  to  the  Stark  II  and  the
Anti-Kickback laws discussed above.

     FTC  Investigation.   Issues  relating  to   physician-owned   health  care
facilities have been investigated by the Federal Trade Commission ("FTC"), which
investigated two lithotripsy  limited  partnerships  affiliated with the General
Partner,  to determine whether they posed an unreasonable  threat to competition
in the health care field. The General Partner and the limited  partnerships were
advised in 1996 that the FTC's investigation was terminated  without any formal
action taken by the FTC or any  restrictions  being placed on the  activities of
the limited  partnerships.  However,  the General Partner cannot assure that the
FTC will  not  investigate  issues  arising  from  physician-owned  health  care
facilities  in the future with  respect to the General  Partner or any entity in
which it is the General Partner.

     Ethical Considerations.  The American Medical Association's Code of Medical
Ethics states that  physicians  should not refer patients to facilities in which
they have an ownership  interest unless such physician directly provides care or
services to such patient at the facility.  Because  physician  investors will be
providing lithotripsy services,  the General Partner believes that an investment
by a physician  will not be in violation of the American  Medical  Association's
Code of Medical  Ethics.  In the event  that the  American  Medical  Association
changes its ethical  code to preclude  such  referrals  by  physicians  and such
ethical requirements are applied to facilities or services which, at the time of
adoption, are owned in whole or in part by referring physicians, the Partnership
and the interests of the Limited Partners may be adversely affected.

State Regulation

     Texas no longer  requires a certificate of need for the  acquisition or use
of major medical equipment or the establishment of clinical health services. Nor
does Texas  impose  licensure  requirements  for the  provision  of  lithotripsy
services. However, the lithotripter must be registered with the Texas Department
of Health,  Bureau of Radiation  Control,  and radiologic  technologists must be
certified by the state.  The Partnership has been complying and will continue to
comply with these requirements.


                                                        38
<PAGE>

     Texas law prohibits paying or accepting any money for soliciting  patients.
To the best knowledge of the General Partner, the Partnership does not engage in
any payment practices  prohibited by Texas law. The Texas  legislature  recently
passed  the  Treatment   Facilities   Marketing  Act,  which  prohibits  certain
solicitation  and remuneration  practices,  but it applies only to mental health
and chemical dependency facilities and not to lithotripsy services.

     The  Partnership  will seek to comply  with all  applicable  statutory  and
regulatory requirements. Further regulations may be imposed in Texas at any time
in  the  future.  Predictions  as to the  form  or  content  of  such  potential
regulations  would be highly  speculative.  They could apply to the operation of
the  Mobile   Lithotripsy  System  or  to  the  physicians  who  invest  in  the
Partnership.  Such restrictive regulations could materially adversely affect the
ability of the Partnership to conduct its business.
 
THE GENERAL  PARTNER  AND THE  PARTNERSHIP  BELIEVE  LITHOTRIPSY  SERVICES  WILL
CONTINUE  TO BE SUBJECT TO INTENSE  GOVERNMENTAL  REGULATION  AT THE FEDERAL AND
STATE LEVELS AND, THEREFORE, CANNOT PREDICT THE SCOPE AND EFFECT THEREOF.

PROSPECTIVE  LIMITED  PARTNERS SHOULD CONSULT WITH THEIR LEGAL COUNSEL AS TO THE
IMPLICATIONS  OF FEDERAL AND STATE LAWS AND  PROFESSIONAL  ETHICAL CODES DEALING
WITH PHYSICIAN  OWNERSHIP OF MEDICAL  EQUIPMENT AND FACILITIES BEFORE PURCHASING
UNITS.

                                PRIOR ACTIVITIES

     Prime,  the sole  shareholder  of the General  Partner,  is the largest and
fastest growing provider of lithotripsy services in the United States, providing
lithotripsy  services at over 400 hospitals and surgery centers in 34 states, as
well  as  delivering  non-medical  services  related  to  the  operation  of the
lithotripters,  including  scheduling,  staffing,  training,  quality assurance,
maintenance,  regulatory  compliance and contracting with payors,  hospitals and
surgery  centers,  while  medical care is rendered by  urologists  utilizing the
lithotripters.  Prime has an  economic  interest in 56 mobile and six fixed site
lithotripters, all but two of which are operated by Prime or the General Partner
and  its  Affiliates.   Prime  began  providing  lithotripsy  services  with  an
acquisition in 1992 and has grown rapidly since that time through a total of ten
acquisitions with interests in 62  lithotripters.  In April 1996, Prime acquired
the General Partner. The General Partner operates over 30 lithotripters  serving
approximately 200 locations in 19 states. The acquisition of the General Partner
provided  Prime with  complementary  geographic  coverage as well as  additional
expertise in forming and managing lithotripsy operations.  Prime and the General
Partner's    lithotripters   together   performed   approximately   31,000,   or
approximately 17%, of the estimated 180,000 lithotripsy  procedures performed in
the United States in 1995. Approximately 1,850 urologists utilized Prime and the
General Partner's lithotripters in 1995,  representing  approximately 25% of the
estimated 7,300 active urologists in the United States.


                                                        39
<PAGE>

     Prime manages the operations of approximately  60 of its 62  lithotripters.
All of its  lithotripters  are operated in connection  with hospitals or surgery
centers.  Prime operates its  lithotripters  as the general partner of a limited
partnership  or through a  subsidiary,  as is the case with the General  Partner
affiliated  partnerships.  Prime  provides a full range of management  and other
non-medical support services to the lithotripsy  operations,  while medical care
is provided by urologists  utilizing the facilities and certain  medical support
services  are  provided  by the  hospital  or  surgery  center.  Urologists  are
investors in 33 of its 40 operations.

     Prime's  lithotripters  range in age from one to  twelve  years.  Of its 62
lithotripters, 56 are mobile units mounted in tractor-trailers or self-contained
coaches  serving  locations  in 34 states.  Prime also  operates  six fixed site
lithotripters in five states. All of Prime's fixed lithotripsy units are located
and operated in  conjunction  with a hospital or surgery  center.  Most of these
locations are in major  metropolitan  markets where the  population  can support
such an operation.  Fixed site  lithotripters  generally  cannot be economically
justified in other locations.

     Prime  and  the  General  Partner  believe  that  they  maintain  the  most
comprehensive   quality  outcomes   database  and  information   system  in  the
lithotripsy  services industry.  Prime has detailed  information on over 100,000
procedures covering patient demographic  information and medical condition prior
to  treatment,  the clinical  and  technical  parameters  of the  procedure  and
resulting  outcomes.  Information  is collected  before,  during and up to three
months after the procedure  through internal data collection by doctors,  nurses
and technicians and through patient questionnaires.

     For numerous reasons, including differences in financial structure, program
size, economic conditions and distribution  policies, the success of the General
Partner's  Affiliates  in the  lithotripsy  field  should not be  considered  as
indicative of the operating results obtainable by the Partnership.


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                                                        40
<PAGE>

                        SOURCES AND APPLICATIONS OF FUNDS

     The  following  table sets forth the funds  expected to be available to the
Partnership  from this  Offering if all 20 Units are sold and other  sources and
their anticipated and estimated uses.

                        Sources of Funds     Sale of 20 Units
Offering Proceeds(1)                           $251,500               (100.00%)
   TOTAL SOURCES                               $251,500               (100.00 %)
                      Application of Funds
Upgrade of LithostarTM                         $ 75,000               (  29.82%)
Reconditioning of Coach(2)                       50,000               (  19.88%)
Loaner Rental Costs(2)                           61,250               (  24.35%)
Reserves(3)                                      27,750               (  11.03%)
Syndication Costs(4)                             37,500               (  14.91%)
   TOTAL APPLICATIONS                          $251,500               (100.00%)


Notes to Sources and Applications of Funds Table

     (1) Assumes all 20 Units are purchased by qualified Investors.

     (2) It is anticipated  that in 1999 the Partnership will upgrade one of its
LithostarsTM with a high intensity shockhead at an estimated cost of $75,000. It
is  further  anticipated  that  in 1999  the  General  Partner  will  cause  the
Partnership to contract with AK Associates, an Affiliate of the General Partner,
to recondition the Partnership's  Coach at an estimated cost of $50,000.  During
the  time  the  Coach  is  reconditioned  (estimated  at  6 - 8  weeks),  it  is
anticipated  that the  Partnership  will rent from the  General  Partner  or its
Affiliates a "loaner" Mobile Lithotripsy System at an estimated per week cost of
$8,750.  The table assumes that each  refurbishment  will take seven weeks.  See
"Business  Activities - Anticipated  Partnership  Expenditures." The proceeds of
this  Offering  cannot be  calculated  until the  number of Units  sold has been
determined  at the  Closing.  To the extent the  proceeds  of the  Offering  are
insufficient  to fund the  costs  described  above,  or such  costs  exceed  the
estimated  amounts,  it is  anticipated  that  Partnership  Cash Flow and/or the
proceeds of debt  financing  will fund such costs.  There is no  assurance  that
Partnership Cash Flow or debt financing will be available for such purpose.  See
"Risk  Factors - Operating  Risks - Partnership  Limited  Resources and Risks of
Leverage."



                                                        41
<PAGE>

     (3) This amount  includes  the General  Partner's  estimate of reserves for
unanticipated  time  overruns  in  scheduled   reconditioning  or  unanticipated
expenses in connection with the reconditioning or upgrade.
 
     (4)   Includes   $5,000  in   commissions   payable  to  the  Sales  Agent,
reimbursement of $7,500 to the Sales Agent for  out-of-pocket  expenses incurred
in selling the Units and $25,000 in legal and accounting  costs  associated with
the preparation of this Memorandum.

                     FINANCIAL CONDITION OF THE PARTNERSHIP

     Set forth on the following pages are the Partnership's  internally prepared
accrual  based (i) Income  Statements  for the years ended  December  31,  1995,
December 31, 1996, December 31,  1997 and for the period ended October 31, 1998,
(ii) Balance Sheets as of December 31, 1996, December 31, 1997 and as of October
31,  1998,  (iii) Cash Flow  Statements  for the year ended  December  31, 1995,
December 31, 1996,  December 31, 1997 and for the period ended  October 31, 1998
and (iv)  Statements of Partner's  Equity for the years ended December 31, 1995,
December 31, 1996, December 31, 1997 and for the period ended October 31, 1998.

     Past  financial  performance  is  not  necessarily   indicative  of  future
performance. There is no assurance that the Partnership will be able to maintain
its current revenues or earnings.



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                                                        45
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                                                        46
<PAGE>

                           MANAGEMENT'S DISCUSSION AND
                      ANALYSIS OF THE RESULTS OF OPERATIONS

Ten Months Ended October 31, 1998 and October 31, 1997

     Revenues.  Total revenues  increased $136,380 (7%) for the ten months ended
October 31, 1998  compared to the same period in 1997 related to an 15% increase
in the number of procedures  performed primarily due to the addition of a second
lithotripter in early 1998. In addition, the Partnership  experienced a decrease
in revenue per case.

     Operating Expenses.  Operating expenses increased by $170,311 (21%) for the
ten months ended  October 31, 1998  compared to the same period in 1997,  due to
costs  related to the  operation  of the second  unit,  including an increase of
$66,065 in other operating  expenses,  including  property taxes,  fuel, medical
supplies and travel costs, an increase of employee  compensation of $55,910, and
an increase in depreciation and amortization of $30,532.

     Other Income  (Expense).  Total other income  (expense),  net  increased by
$3,437 (56%) due to the increase in interest income.

Year Ended December 31, 1997 and December 31, 1996

     Revenues. Total revenues increased $47,646 (2%) for the year ended December
31, 1997  compared  to the same  period in 1996  related to a 7% decrease in the
number of procedures performed, and a increase in revenue per case.

     Operating  Expenses.  Operating  expenses decreased by $69,207 (7%) for the
year ended  December  31, 1997  compared  to the same  period in 1996,  due to a
decrease  of  $86,083  in  overhead  allocation,  which is  based on  procedures
performed,  due to the decline in procedures,  and partially offset by a $29,508
decline in other operating expenses.

     Other Income  (Expense).  Total other income  (expense),  net  decreased by
$6,164 (42%) due to the decrease in interest income.

Year Ended December 31, 1996 and December 31, 1995

     Revenues.  Total  revenues  increased  $402,126  (21%)  for the year  ended
December 31, 1996 compared to the same period in 1995, related to a 17% increase
in the number of  procedures  performed,  and a slight  increase  in revenue per
case.

     Operating  Expenses.  Operating  expenses increased by $60,991 (6%) for the
year ended  December  31, 1996  compared  to the same period in 1995,  due to an
increase  in  overhead  allocation  of  $84,764,  which is  based on  procedures
performed, due to the increase in procedures,  and partially offset by a $31,096
decline in equipment maintenance and repair.

                                                        47
<PAGE>

     Other Income  (Expense).  Other income  (expense),  net increased by $5,228
(56%) due to a increase in interest income.

                      SUMMARY OF THE PARTNERSHIP AGREEMENT

     The  Partnership  Agreement  sets  forth the  powers  and  purposes  of the
Partnership and the respective rights and obligations of the General Partner and
the Limited Partners.  The following is only a summary of certain  provisions of
the Partnership  Agreement,  and does not purport to be a complete  statement of
the various rights and  obligations  set forth  therein.  A complete copy of the
Partnership  Agreement  is set  forth  as  Appendix  A to this  Memorandum,  and
Investors  are urged to read the  Partnership  Agreement  in its entirety and to
review it with their counsel and advisors.

Nature of Limited Partnership Interest

     The Investors will acquire their  interests in the  Partnership in the form
of Units.  For each Unit purchased,  a cash payment of $12,575 is required.  The
entire Unit purchase price is due in cash upon  subscription;  however,  certain
qualified  Investors may finance a portion of the purchase price through Limited
Partner  Loans.  See  "Terms of the  Offering - Limited  Partnership  Loans." No
Limited  Partner will have any  liability for the debts and  obligations  of the
Partnership by reason of being a Limited Partner except to the extent of (i) his
or her Capital  Contribution and liability under a Limited Partner Loan, if any,
(ii)  his  or  her  proportionate  share  of the  undistributed  profits  of the
Partnership,  and  (iii)  the  amount  of any  Distribution  received  from  the
Partnership at a time when its  liabilities,  other than liabilities to Partners
with  respect  to their  Partnership  Interests  and  liabilities  for which the
recourse of creditors is limited to specific property of the Partnership, exceed
the fair value of its assets,  except  that the fair value of  property  that is
subject to a liability  for which  recourse  of  creditors  is limited  shall be
included in the Partnership Assets only to the extent that the fair value of the
property  exceeds that  liability,  as provided by the Act. See "Risk  Factors -
Other  Investment  Risks  -  Limited  Partners'  Obligation  to  Return  Certain
Distributions."  See also Form of Legal  Opinion of Womble  Carlyle  Sandridge &
Rice, PLLC attached hereto as Appendix C.
Profits, Losses and Distributions

     The  following  is a  Summary  of  certain  provisions  of the  Partnership
Agreement  relating to the allocation and  distribution of the Profits,  Losses,
Partnership  Cash Flow,  Partnership  Refinancing  Proceeds,  Partnership  Sales
Proceeds, and cash upon dissolution of the Partnership. Because an understanding
of the defined  financial terms is essential to an evaluation of the information
presented below,  Investors should carefully review the definitions of the terms
appearing in the Glossary.


                                                        48

1. Allocations of Profits and Losses.

     (a) General.  Generally,  Profits and Losses,  if any, for each Year of the
Partnership will be allocated  proportionately among the Partners based on their
respective  Percentage  Interests in the Partnership;  provided that New Limited
Partners will be allocated only Profits and Losses that accrue after the date of
their admission to the Partnership as Limited Partners.

     (b) Allocations. Net gains and net losses from Capital Transactions (a part
of Profits and  Losses),  if any,  shall be allocated  first.  Each Partner will
receive his pro rata share of Profits  and Losses  based upon the number of days
such Partner was a member of the Partnership during the Year of the Partnership.
Notwithstanding the foregoing,  the Partnership's  "allocable cash basis items,"
as that term is used in Section  706(d)(2)(B)  of the Code, will be allocated as
required  by  Section  706(d)(2)  of  the  Code  and  the  treasury  regulations
promulgated thereunder.

     (c) Qualified Income Offset. If any Limited Partner  unexpectedly  receives
an adjustment,  allocation or distribution  as described in Treasury  Regulation
Section 1.704- 1(b)(2)(ii)(d)(4) through (6) that causes such Limited Partner to
have a deficit Capital Account  balance,  such Limited Partner will be allocated
items of income and gain in an amount and manner  sufficient  to eliminate  such
deficit  balance as quickly as  possible.  This  provision  is  intended to be a
"qualified income offset" as defined in Regulation Section 1.704-1(b)(2)(ii)(d).

2. Distributions.

     (a) Non-liquidation  Distributions.  Partnership Cash Flow for each Year of
the Partnership,  to the extent  available,  will be distributed  within 60 days
after the end of each Year of the  Partnership,  or earlier in the discretion of
the  General  Partner,   proportionately  among  the  Partners  based  on  their
respective  Percentage Interests in the Partnership at the time of distribution.
Partnership  Sales  Proceeds  and  Partnership   Refinancing  Proceeds  will  be
distributed  within  60  days of the  Capital  Transaction  giving  rise to such
proceeds,  or earlier in the discretion of the General Partner,  proportionately
among  the  Partners  based  on their  respective  Percentage  Interests  in the
Partnership  as of the  date  of the  Capital  Transaction  giving  rise to such
proceeds.  The New Limited Partners have no rights to receive any  distributions
in the future that are made out of the  Initial  Limited  Partners'  and General
Partner's accrued but undistributed Partnership Cash Flow as of the date the New
Limited Partners are admitted to the  Partnership.  New Limited Partners will be
entitled  only to  Partnership  Cash Flow that  accrues  after the date of their
admission to the Partnership as Limited Partners

     (b) Distribution Upon Dissolution.  Upon the dissolution and termination of
the Partnership,  the General Partner or, if there is none, a representative  of
the Limited Partners, will liquidate the assets of the Partnership. The proceeds
of such  liquidation  will be applied and  distributed in the following order of
priority:  (a)  first,  to the  payment  of the  debts  and  liabilities  of the
Partnership, and the expenses of liquidation; (b) second, to the creation of any
reserves which the General Partner or the representative of the Limited Partners
may deem  reasonably  necessary for the payment of any  contingent or unforeseen
liabilities or obligations of the Partnership or of the

                                                        49
<PAGE>

     General  Partner  arising out of or in  connection  with the  business  and
operation  of the  Partnership;  and (c) third,  the  balance,  if any,  will be
distributed to the Partners in accordance  with the Partners'  positive  capital
account balances.  Any General Partner with a negative capital account following
the distribution of liquidation proceeds or the liquidation of its interest must
contribute to the  Partnership an amount equal to such negative  capital account
on or before the end of the  Partnership's  taxable  year (or, if later,  within
ninety days after the date of liquidation).  Any capital so contributed shall be
(i)  distributed  to those  Partners with positive  capital  accounts until such
capital  accounts are reduced to zero,  and/or (ii) used to  discharge  recourse
liabilities.

Management of the Partnership

     The  General  Partner  has the sole  right to manage  the  business  of the
Partnership and at all times is required to exercise its  responsibilities  in a
fiduciary capacity.  The consent of the Limited Partners is not required for any
sale  or  refinancing  of  the  Mobile  Lithotripsy  Systems,  the  purchase  of
additional Mobile  Lithotripsy  Systems or the purchase of other new Partnership
assets.  The  General  Partner  will  oversee  the  day-to-day  affairs  of  the
Partnership  pursuant to the Management  Agreement.  See "Business  Activities -
Management."

     Under the  Partnership  Agreement,  if the General Partner is adjudged by a
court of  competent  jurisdiction  to be liable to the  Limited  Partners or the
Partnership  for  acts  of  gross  negligence  or  willful   misconduct  in  the
performance  of its duties  under the terms of the  Partnership  Agreement,  the
General Partner may be removed and another  substituted  with the consent of all
of the Limited  Partners.  The General  Partner may transfer all or a portion of
its  Partnership   Interest  only  if,  in  the  opinion  of  the  Partnership's
accountant,  the new general  partner has  sufficient  net worth and meets other
requirements  to assure that the  Partnership  will  continue to be treated as a
partnership for Federal tax purposes.  Both the admission of any new shareholder
and the  withdrawal  of any  shareholder  from the  General  Partner may be done
without the approval of the Limited Partners.
Powers of the General Partner

     The General Partner may, in its absolute discretion, borrow money, acquire,
encumber,  hold title to, pledge,  sell, release or otherwise dispose of, all or
any part of the Partnership's  assets, when and upon such terms as it determines
to be in the best interest of the  Partnership,  employ such persons as it deems
necessary for the operation of the  Partnership and deposit,  withdraw,  invest,
pay,  retain  (including  the  establishment  of reserves)  and  distribute  the
Partnership's funds. The General Partner, however, is expressly prohibited from,
among other things: (i) possessing Partnership assets or assigning the rights of
the Partnership in Partnership assets, including the Mobile Lithotripsy Systems,
for other than Partnership purposes;  (ii) admitting  Limited Partners except as
provided in the Partnership  Agreement;  (iii) performing any act (other than an
act  required  by the  Partnership  Agreement  or any act  taken  in good  faith
reliance upon  Counsel's  opinion)  which would,  at the time such act occurred,
subject  any  Limited   Partner  to  liability  as  a  general  partner  in  any
jurisdiction; and (iv) performing any act in contravention of the

                                                        50
<PAGE>

     Partnership  Agreement  or which  would  make it  possible  to carry on the
ordinary business of the Partnership.

Rights and Liabilities of the Limited Partners

     The Limited Partners do not have any right to participate in the management
of the  business  of the  Partnership  and will not  transact  business  for the
Partnership. Limited Partners are not required to make any capital contributions
to the  Partnership  except  amounts  agreed  by them to be  paid,  or pay or be
personally liable for, any expense,  liability or obligation of the Partnership,
except to the extent (i) his or her Capital  Contribution  and liability under a
Limited  Partner  Loan,  if any,  (ii)  his or her  proportionate  share  of the
undistributed  profits  of  the  Partnership,   and  (iii)  the  amount  of  any
Distribution received from the Partnership at a time when its liabilities, other
than  liabilities  to Partners with respect to their  Partnership  Interests and
liabilities for which the recourse of creditors is limited to specific  property
of the  Partnership,  exceed the fair value of its assets,  except that the fair
value of property that is subject to a liability for which recourse of creditors
is limited shall be included in the  Partnership  assets only to the extent that
the fair value of the property  exceeds that liability,  as provided by the Act.
See  "Risk   Factors  -  Limited   Partners   Obligations   to  Return   Certain
Distributions."

     The  Limited  Partners  may not  participate  in or own an  interest in any
competing lithotripsy venture,  except with the approval of the General Partner.
See "Limited Partner Competition and Disclosure Restrictions" below. The General
Partner may elect to treat  participation or ownership by a Limited Partner in a
competing  venture  as an event of  default,  and such  Limited  Partner  may be
required to sell his  Partnership  Interest.  See "Optional  Purchase of Limited
Partner Interests" below.

Restrictions on Transfer of Partnership Interests

     After  acquisition of Units by Investors,  no Partnership  Interest nor any
Units may be  transferred  without  the prior  written  consent  of the  General
Partner,  which approval may be granted or denied in the sole  discretion of the
General Partner, and subject to the satisfaction of certain other conditions set
forth  in  the  Partnership   Agreement.   The  Partnership  Agreement  contains
additional  limitations on transfer,  including provisions  prohibiting transfer
that would cause the  termination of the  Partnership,  would violate federal or
state  securities laws, would prevent the Partnership from being entitled to use
any method of depreciation  which the Partnership might otherwise be entitled to
use, or would  adversely  affect the status of the  Partnership as a partnership
for  Federal  income  tax  purposes.  In  addition,  the  Partnership  Agreement
prohibits  the  holding or transfer  of a  Partnership  interest by or to a "tax
exempt entity" (as defined in Code Section 168(h)) which would affect the method
or  manner  in which the  Partnership  may  depreciate  Partnership  assets.  No
transferee of the Units will automatically  become a Limited Partner.  Admission
of a transferee to the Partnership as a Limited Partner requires the fulfillment
of other obligations enumerated in the Partnership  Agreement,  including either
the approval of all the Limited  Partners  (except the assignor Limited Partner)
and the General Partner, or the approval of the assignor Limited Partner and the
General  Partner.  Any  transferee  of a  Partnership  Interest who has not been
admitted to the Partnership as a

                                                        51
<PAGE>


     Partner shall not be entitled to any of the rights, powers or privileges of
his  transferor  except the right to receive and be credited or debited with his
proportionate share of Partnership income, gains, profits,  losses,  deductions,
credits or distributions. A transferor Limited Partner will not be released from
his or her personal liability under the Limited Partner Loans,  unless otherwise
specifically agreed by the Bank.

Dissolution and Liquidation

     The  Partnership  will  dissolve  and  terminate  for any of the  following
reasons:

     1. The sale,  exchange or  disposition of all or  substantially  all of the
property  of the  Partnership  without  making  provision  for  the  replacement
thereof;

     2. The expiration of its term on December 31, 2040;

     3. The bankruptcy or occurrence of certain other events with respect to the
General Partner;

     4. The election to dissolve the Partnership made by the General Partner and
a Majority in Interest of the Limited Partners; or

     5. Any other  reason which under the laws of the State of Texas would cause
a dissolution.

     The  retirement,  resignation,  bankruptcy,  assignment  for the benefit of
creditors,  dissolution,  death,  disability  or legal  incapacity  of a general
partner will not,  however,  result in a termination  of the  Partnership if the
remaining  general  partner or general  partners,  if any, elect to continue the
business of the Partnership, or if no general partner remains, if within 90 days
of the  occurrence of one of such events,  all of the Limited  Partners elect in
writing to continue the Partnership  and, if necessary,  designate a new general
partner.

     Upon   dissolution,   the  General   Partner  or,  if  there  is  none,   a
representative of the Limited Partners,  will liquidate the Partnership's assets
and distribute the proceeds  thereof in accordance with the priorities set forth
in  the  Partnership  Agreement.  See  "Profits,   Losses  and  Distributions  -
Distributions - Distribution upon Dissolution"  above and "Optional  Purchase of
Limited Partner Interests" below.

Noncompetition Agreement and Protection of Confidential Information

     The  Partnership  Agreement  provides  that each  Partner  (other  than the
General  Partner  and its  Affiliates)  is  prohibited  from  having a direct or
indirect  ownership  interest in a  competing  venture  (including  the lease or
sublease of competing  technology)  (the "Outside  Activities").  While they own
Partnership  Interests,  each Partner is precluded  from engaging in any Outside
Activities.  In the event that a Partner's Partnership Interest is terminated or
transferred upon the occurrence of


                                                        52
<PAGE>


     certain events as provided in the  Partnership  Agreement,  such Partner is
precluded,  for a period of two (2) years following the date of such withdrawal,
from  engaging  in any  Outside  Activity  within any  market  area in which the
Partnership  is providing  services or has provided  services  within the twelve
months preceding the withdrawal. This prohibition is in addition to the right of
the General  Partner to acquire the interest of a Partner  engaged in an Outside
Activity as provided in the  Partnership  Agreement.  See "Optional  Purchase of
Limited  Partner  Interests"  in this Section,  and the form of the  Partnership
Agreement attached hereto as Appendix B.

     In  addition,   the  Partnership   Agreement  provides  that  each  Partner
acknowledges  and agrees that such Partner's  participation  in the  Partnership
necessarily involves his access to confidential  information that is proprietary
in  nature  and,   therefore,   the  exclusive   property  of  the  Partnership.
Accordingly,  the Partners  (other than the General  Partner and its Affiliates)
are  precluded  from  disclosing  such  confidential  information  during  their
participation as Partners or thereafter unless required by law or with the prior
written consent of the Partners.

Optional Purchase of Limited Partner Interests

     As  provided in the  Partnership  Agreement,  the  General  Partner and the
Limited  Partners  have an  option to  purchase  all the  interest  of a Limited
Partner in the  Partnership  upon the  occurrence  with  respect to the  Limited
Partner of (i) death,  (ii) bankruptcy,  insolvency or assignment for benefit of
creditors,  or (iii) direct or indirect  ownership of an interest in a competing
venture.  Upon  the  occurrence  of one or more  of the  preceding  events,  the
withdrawing Limited Partner, or his or her personal representative,  will have a
brief period  within which to sell his or her entire  Partnership  Interest to a
purchaser approved of by the General Partner. If the withdrawing Limited Partner
is unable to sell his or her Partnership Interest as provided above, the General
Partner will then have the option to purchase such Partnership  Interest. If the
General Partner elects to exercise its option, the option purchase price will be
equal to the  withdrawing  Limited  Partner's  share of the  Partnership's  book
value,  if any, as reflected by such Limited  Partner's  capital  account in the
Partnership  (unadjusted  for any  appreciation  in  Partnership  assets  and as
reduced by depreciation deductions claimed by the Partnership for tax purposes).
The withdrawing  Limited Partner will not be released from his obligations under
any Limited Partner Loan unless so agreed by the Bank. Furthermore,  sale of his
or her Limited Partnership Interest may constitute an event of default under the
Limited  Partner Loan, if any. See "Terms of Offering - Limited  Partner Loans."
There can be no assurance that the option purchase price will represent the fair
market  value  of a  Limited  Partner's  interest  in the  Partnership.  Because
Partnership  losses,  depreciation  deductions and Distributions  reduce capital
accounts,  and because  appreciation  in Partnership  assets is not reflected in
capital  accounts,  it is the  opinion of the  General  Partner  that the option
purchase price will be nominal in amount.

Dilution Offerings

     The  General  Partner  has the  authority  to  periodically  offer and sell
additional  limited  partnership  interests in the Partnership  through Dilution
Offerings  to  local  south  Texas  urologists  who  are  not  investors  in the
Partnership ("Qualified Investors"). The primary purpose of Dilution

                                                        53
<PAGE>

     Offerings  would  be (i) to raise  additional  capital  for any  legitimate
Partnership  purpose  including  upgrading the  Partnership's  Lithostar  Mobile
System and (ii) to assure the  highest  quality  of  patient  care by  admitting
Qualified  Investors to the  Partnership  who will be dedicated and motivated as
owners to follow the  Partnership s  treatment  protocol,  and  comply  with its
quality assurance and outcome analysis programs.

     Any sale of  limited  partnership  interests  in a Dilution  Offering  will
result in the proportionate  dilution of the Partnership Percentage Interests of
the existing  Partners;  i.e.,  the interests of the General  Partner and of the
Limited  Partners in  Partnership  allocations,  cash  distributions  and voting
rights  will be  proportionately  reduced as a result of a  successful  Dilution
Offering.  The  Percentage  Interests  of the  General  Partner  and the Initial
Limited  Partners,  as in  effect  prior to this  Offering,  may not be  diluted
through  Dilution  Offerings  (including  this Offering) by more than 20% in the
aggregate without the prior written consent of a Majority in Interest of all the
Partners.  Any additional  limited  partnership  interests offered in a Dilution
Offering  will be sold for a price no lower  than  their  fair  market  value as
determined by the General Partner,  in its sole discretion,  at the time of this
Offering.

Arbitration

     The Partnership  Agreement  provides that disputes arising thereunder shall
be resolved by submission to arbitration in Laredo, Texas in accordance with the
then  prevailing  commercial  arbitration  rules  of  the  American  Arbitration
Association.

Power of Attorney

     Each  Investor,  by  executing  the  Subscription  Agreement,   irrevocably
appoints  Dr. Joseph  Jenkins  and  Dr.  David  Vela,   severally,   to  act  as
attorneys-in-fact to execute the Partnership  Agreement,  any amendments thereto
and any certificate of limited  partnership  filed by the General  Partner.  The
Partnership  Agreement,  in turn,  contains  provisions  by which  each  Limited
Partner  irrevocably  appoints  Dr.  Joseph  Jenkins,  to  act  as  his  or  her
attorney-in-fact to make, execute,  swear to and file any documents necessary to
the conduct of the Partnership's  business,  such as deeds of conveyance of real
or personal property as well as any amendment to the Partnership Agreement or to
any  certificate  of  limited  partnership  which  accurately  reflects  actions
properly taken by the Partners.
Reports to Limited Partners

     Within 90 days after the end of each Year of the  Partnership,  the General
Partner  will send to each  person who was a Limited  Partner at any time during
such year such tax  information,  including,  without  limitation,  Federal  Tax
Schedule K-1, as will be reasonably necessary for the preparation by such person
of his federal income tax return, and such other financial information as may be
required by the Act.



                                                        54
<PAGE>

Records

     Proper  and  complete  records  and  books of  account  will be kept by the
General  Partner in which will be entered fully and accurately all  transactions
and other matters relative to the Partnership's  business as are usually entered
into records and books of account maintained by persons engaged in business of a
like character.  The Partnership books and records will be kept according to the
method of accounting determined by the General Partner. The Partnership's fiscal
year will be the  calendar  year.  The books and records  will be located at the
office of the General Partner, and will be open to the reasonable inspection and
examination  of the Limited  Partners or their duly  authorized  representatives
during normal business hours.

                                  LEGAL MATTERS

     Certain legal matters in connection  with the Units offered  hereby will be
passed  upon  for  the  Partnership  by  Womble  Carlyle  Sandridge  &  Rice,  a
Professional  Limited Liability Company, of Winston-Salem,  North Carolina.  See
"Conflicts of Interest." On the Closing Date, Womble Carlyle Sandridge & Rice, a
Professional Limited Liability Company will render an opinion, the form of which
is attached as Appendix C to this  Memorandum,  with respect to certain  federal
income tax  consequences  of an  investment  in Units.  See "Tax  Aspects of the
Offering."
                                    GLOSSARY

     Certain terms in this Memorandum shall have the following meanings:

          Act. The Act means the Texas Revised  Limited  Partnership  Act, as in
     effect on the date hereof.

          Affiliate.  An Affiliate is (i) any person,  partnership  corporation,
     association  or  other  legal  entity  ("person")  directly  or  indirectly
     controlling,  controlled  by or under common  control with another  person,
     (ii) any person owning or controlling 10% or more of the outstanding voting
     interests of such other person,  (iii) any officer,  director or partner of
     such  person  and (iv) if such  other  person is an  officer,  director  or
     partner, any entity for which such person acts in such capacity.

          AK  Associates.  AK  Associates,  Inc., a subsidiary  of Prime.  It is
     anticipated  that the  Partnership  will  contract  with AK  Associates  to
     recondition the Partnership's Coach with the proceeds of the Offering.

          Bank. First-Citizens Bank & Trust Company.

          Capital  Account.  The  Partnership  capital  account  of a Partner as
     computed pursuant to Article XII of the Partnership Agreement.



                                                        55
<PAGE>

          Capital Contributions.  All capital contributions made by a Partner or
     his  predecessor  in interest  which  shall  include,  without  limitation,
     contributions made pursuant to Article VII of the Partnership Agreement.

          Capital  Transaction.  Any  transaction  which,  were  it to  generate
     proceeds,   would  produce   Partnership   Sales  Proceeds  or  Partnership
     Refinancing Proceeds.

          Closing  Date.  5:00  p.m.,  Central  Time,  on January  20,  1999 (or
     earlier) in the discretion of the General Partner.  The Closing Date may be
     extended  for a period of up to 180 days in the  discretion  of the General
     Partner.

          Coach. The Partnership's self-propelled mobile vehicle manufactured by
     the Calumet  Coach  Company,  Calumet City,  Illinois,  upfitted to house a
     LithostarTM.

          Code. The Internal Revenue Code of 1986, or  corresponding  provisions
     of subsequent, superseding revenue laws.

          Contract  Hospitals.  The 8 hospitals,  medical centers and ambulatory
     surgery  centers to which the  Partnership  provides  lithotripsy  services
     pursuant to 8 separate Hospital Contracts.

          Counsel. Counsel to the Partnership,  Womble Carlyle Sandridge & Rice,
     a Professional  Limited Liability Company,  P.O. Drawer 84,  Winston-Salem,
     North Carolina 27102.

          Dilution Offering. The issuance,  offering and sale by the Partnership
     of additional partnership interests in the future.

          Distributions. Cash or other property, from any source, distributed to
     Partners.

          Escrow Agent. First-Citizens Bank & Trust Company.

          FDA. The United States Food and Drug Administration.

          Financial Statement.  The Purchaser Financial  Statement,  included in
     the Subscription  Packet  accompanying this Memorandum,  to be furnished by
     the Investors for review by the General  Partner and the Bank in connection
     with their decision to accept or reject a subscription.

          General   Partner.   The   general   partner   of   the   Partnership,
     Lithotripters,  Inc.,  a North  Carolina  corporation,  and a wholly  owned
     subsidiary of Prime Medical Services, Inc.

          Hospital Contracts. The 8 separate lithotripsy services agreements the
     Partnership has entered into with the contract Hospitals.


                                                        56
<PAGE>


          Initial Limited  Partners.  The Individuals who were Limited  Partners
     prior to the commencement of this Offering.

          Investors. Potential purchasers of Units.

          Limited  Partner  Loan.  The  loan to be made by the  Bank to  certain
     qualified  Investors  that wish to finance a portion  of the Unit  purchase
     price.

          Limited Partner Note. The promissory note from an Investor financing a
     portion of the Unit purchase  price to the Bank in the principal  amount of
     $10,075  per Unit,  the  proceeds  of which  will be paid  directly  to the
     Partnership.  The form of the  Limited  Partner  Note  (including  the Note
     Addendum  attached  thereto) is attached as  Exhibit A  to the Form of Bank
     Commitment which is attached hereto as Appendix B.

          Limited  Partners.  The Limited  Partners  are those  Investors in the
     Units admitted to the  Partnership  and any person admitted as a substitute
     Limited  Partner  in  accordance  with the  provisions  of the  Partnership
     Agreement.

          LithostarTM. The  two  LithostarTM model extracorporeal  shock  wave
     lithotripters manufactured by Siemens and owned by the Partnership.

          Loan  and  Security  Agreement.   The  agreement  to  be  executed  in
     conjunction  with the Limited  Partner  Note by an Investor  who finances a
     portion of the Unit purchase price through a Limited Partner Loan. The form
     of the Loan and Security  Agreement is attached as Exhibit B to the Form of
     Bank Commitment which is attached hereto as Appendix B.

          Loan Documents. The Form of Bank Commitment, the Limited Partner Note,
     the  Loan  and  Security  Agreement,  the  Security  Agreement  and  UCC-1,
     collectively.

          Loss. The net loss  (including  capital losses and excluding Net Gains
     from Capital  Transactions)  of the Partnership for each year as determined
     by the Partnership for federal income tax purposes.

          Memorandum. This Confidential Private Placement Memorandum,  including
     all Appendices hereto, and any amendment or supplement hereto.

          Mobile Lithotripsy  Systems.  The Coach and Trailer with the installed
     and operational LithostarsTM owned and operated by the Partnership.

          Net  Gains  from  Capital  Transactions.  The  gains  realized  by the
     Partnership  as a result of or upon any  sale,  exchange,  condemnation  or
     other  disposition of the capital assets of the  Partnership  (which assets
     shall  include  Code  Section  1231  assets)  or as a result of or upon the
     damage or destruction of such capital assets.



                                                        57
<PAGE>

          New Limited  Partner.  Any Investor  admitted to the  Partnership as a
     Limited Partner.

          Nonrecourse   Deductions.   A  deduction  as  set  forth  in  Treasury
     Regulations Section 1.704-2(b)(1). The amount of Nonrecourse Deductions for
     a given Year equals the excess, if any, of the net increase, if any, in the
     amount of  Partnership  Minimum  Gain during  such Year over the  aggregate
     amount of any  Distributions  during such Year of proceeds of a Nonrecourse
     Liability  that are allocable to an increase in  Partnership  Minimum Gain,
     determined  according to the  provisions  of Treasury  Regulations  Section
     1.704-2(h).

          Nonrecourse Liability.  Any Partnership liability (or portion thereof)
     for which no Partner bears the "economic  risk of loss," within the meaning
     of Treasury Regulations Section 1.704- 2(i).

          Offering. The offering of Units pursuant to this Memorandum.

          Partner  Minimum  Gain.  An  amount,  with  respect  to  each  Partner
     Nonrecourse  Debt, equal to the Partnership  Minimum Gain that would result
     if such Partner  Nonrecourse Debt were treated as a Nonrecourse  Liability,
     determined in accordance with Treasury Regulations Section 1.704-2(i).

          Partner  Nonrecourse  Debt. Any nonrecourse  debt (for the purposes of
     Treasury  Regulations  Section  1.1001-2) of the  Partnership for which any
     Partner bears the  "economic  risk of loss," within the meaning of Treasury
     Regulations Section 1.752-2.

          Partner  Nonrecourse  Deductions.  Deductions as described in Treasury
     Regulations  Section  1.704-2(i)(2).  The  amount  of  Partner  Nonrecourse
     Deductions with respect to a Partner  Nonrecourse  Debt for any Year equals
     the excess,  if any, of the net increase,  if any, in the amount of Partner
     Minimum Gain attributable to such Partner Nonrecourse Debt during such Year
     over the  aggregate  amount of any  Distributions  during  that Year to the
     Partner that bears the economic  risk of loss for such Partner  Nonrecourse
     Debt to the extent such Distributions are from the proceeds of such Partner
     Nonrecourse  Debt and are allocable to an increase in Partner  Minimum Gain
     attributable  to such Partner  Nonrecourse  Debt,  determined in accordance
     with Treasury Regulations Section 1.704-2(i).

          Partners. The General Partner and the Limited Partners,  collectively,
     when no  distinction  is  required by the context in which the term is used
     herein.

          Partnership.  Texas Lithotripsy  Limited  Partnership I L.P., an Texas
     limited partnership.

          Partnership   Agreement.   The  Partnership's   Agreement  of  Limited
     Partnership,  the form of which is attached  hereto as  Appendix A,  as the
     same may be amended from time to time.


                                                        58
<PAGE>


          Partnership Cash Flow. For the applicable  period the excess,  if any,
     of (A) the sum of (i) all gross  receipts  from any source for such period,
     other  than  from  Partnership  loans,  Capital  Transactions  and  Capital
     Contributions,  and  (ii)  any  funds  released  by  the  Partnership  from
     previously established reserves,  over (B) the sum of (i) all cash expenses
     paid by the Partnership for such period, (ii) the amount of all payments of
     principal on loans to the  Partnership,  (iii) capital  expenditures of the
     Partnership, and (iv) such reasonable reserves as the General Partner shall
     deem necessary or prudent to set aside for future repairs, improvements, or
     equipment replacement or additions, or to meet working capital requirements
     or foreseen or  unforeseen  future  liabilities  and  contingencies  of the
     Partnership;  provided,  however,  that the amounts referred to in (B) (i),
     (ii) and (iii)  above  shall be taken into  account  only to the extent not
     funded  by  Capital   Contributions,   loans  or  paid  out  of  previously
     established  reserves.  Such term shall also include all other funds deemed
     available for distribution and designated as "Partnership Cash Flow" by the
     General Partner.

          Partnership Interest.  The interest of a Partner in the Partnership as
     defined by the Act and the Partnership Agreement.

          Partnership  Minimum  Gain.  Gain as defined in  Treasury  Regulations
     Section 1.704-2(d).

          Partnership   Refinancing   Proceeds.   The  cash  realized  from  the
     refinancing of Partnership assets after retirement of any secured loans and
     less (i)  payment of all  expenses  relating  to the  transaction  and (ii)
     establishment of such reasonable reserves as the General Partner shall deem
     necessary  or  prudent to set aside for future  repairs,  improvements,  or
     equipment replacement or additions, or to meet working capital requirements
     or  foreseen or  unforeseen  future  liabilities  or  contingencies  of the
     Partnership.

          Partnership Sales Proceeds. The cash realized from the sale, exchange,
     casualty or other  disposition  of all or a portion of  Partnership  assets
     after the  retirement  of all secured loans and less (i) the payment of all
     expenses  related  to  the  transaction  and  (ii)  establishment  of  such
     reasonable  reserves as the General Partner shall deem necessary or prudent
     to set aside for future repairs,  improvements, or equipment replacement or
     additions,   or  to  meet  working  capital  requirements  or  foreseen  or
     unforeseen future liabilities or contingencies of the Partnership.

          Percentage Interest.  The interest of each Partner in the Partnership,
     to be  determined  in  the  case  of  each  Investor  by  reference  to the
     percentage  opposite  his  or  her  name  set  forth  in  Exhibit A  to the
     Partnership Agreement.  Each Unit sold pursuant to this offering represents
     an initial 0.83% economic  interest.  The  Percentage  Interest will be set
     forth in Exhibit A to the  Partnership  Agreement or any other  document or
     agreement,  as a percentage or a fraction or on any numerical  basis deemed
     appropriate by the General Partner.

          Prime.   Prime  Medical  Services,   Inc.  a  publicly  held  Delaware
     corporation and parent of the General Partner,  AK Associates and the Sales
     Agent.


                                                        59
<PAGE>

          Prime Rate. The rate of interest periodically  established by the Bank
     and identified as such in literature  published and  circulated  within the
     Bank's offices.

          Profit.  The net income of the Partnership for each year as determined
     by the Partnership for federal income tax purposes.

          Pro Rata Basis. In connection with an allocation or  distribution,  an
     allocation  or  distribution  in proportion  to the  respective  Percentage
     Interest of the class of Partners to which reference is made.

          Qualified   Income   Offset  Item.   An   adjustment,   allocation  or
     distribution     described     in     Treasury     Regulations     Sections
     1.704-1(b)(2)(ii)(d)(4),       1.704-1(b)(2)(ii)(d)(5)       or      1.704-
     1(b)(2)(ii)(d)(6) unexpectedly received by a Partner.

          Sales Agent.  MedTech Investments,  Inc., a registered  broker-dealer,
     member of the  National  Association  of  Securities  Dealers,  Inc. and an
     Affiliate of certain members of the General Partner's management personnel.

          SEC. The United States Securities and Exchange Commission.

          Securities Act. The Securities Act of 1933, as amended.

          Security  Agreement.  The agreement to be executed in conjunction with
     the Limited  Partner Note by an Investor who finances the purchase price of
     his  Units as  provided  herein.  The  form of the  Security  Agreement  is
     attached  as  Exhibit C  to the Form of Bank  Commitment  which is attached
     hereto as Appendix B.

          Service. The Internal Revenue Service.

          Service Area. South Texas.

          Siemens. Siemens Medical Systems, Inc. and its Affiliates.

          Subscription Agreement.  The Subscription  Agreement,  included in the
     Subscription  Packet  accompanying  this Memorandum,  to be executed by the
     Limited Partners in connection with their purchase of Units.

          Subscription  Packet.  The  packet  of  subscription  materials  to be
     completed by Investors in connection with their subscription for Units.

          Trailer. The Partnership's Trailer upfitted to house a LithostarTM. 
     The Trailer is transported from site to site by a tractor truck.


                                                        60
<PAGE>

          UCC-1. The Uniform Commercial Code Financing Statement,  two copies of
     which are  attached  to the  Subscription  Packet and are to be executed in
     conjunction  with the Limited  Partner  Note by an Investor  who finances a
     portion of the Unit  purchase  price through a Limited  Partner  Loan.  The
     UCC-1 will be used by the Bank to perfect  its  security  interest  in such
     Investor's share of Distributions.

          Units.  The 20 equal  limited  partner  interests  in the  Partnership
     offered  pursuant  to this  Memorandum  for a price per Unit of  $12,575 in
     cash.

          Year  of the  Partnership.  An  annual  accounting  period  ending  on
     December 31 of each year during the term of the Partnership.

                            _________________________


                                                        61
<PAGE>








                               OPERATING AGREEMENT

                                       OF

                       WASHINGTON UROLOGICAL SERVICES, LLC


                    (A Washington Limited Liability Company)


                           Dated: ____________, 199__










THE LLC MEMBERSHIP  INTERESTS  REPRESENTED BY THIS OPERATING  AGREEMENT HAVE NOT
BEEN REGISTERED WITH THE SECURITIES AND EXCHANGE COMMISSION UNDER THE SECURITIES
ACT OF 1933, AS AMENDED,  OR UNDER THE  SECURITIES  ACTS OR LAWS OF ANY STATE IN
RELIANCE UPON EXEMPTIONS UNDER THOSE ACTS OR LAWS. THE SALE OR OTHER DISPOSITION
OF THE MEMBERSHIP INTERESTS IS RESTRICTED AS STATED IN THIS OPERATING AGREEMENT,
AND IN ANY EVENT IS  PROHIBITED  UNLESS THE LLC  RECEIVES  AN OPINION OF COUNSEL
SATISFACTORY  TO IT AND ITS COUNSEL THAT SUCH SALE OR OTHER  DISPOSITION  CAN BE
MADE WITHOUT  REGISTRATION UNDER THE SECURITIES ACT OF 1933, AS AMENDED, AND ANY
APPLICABLE STATE SECURITIES ACTS AND LAWS. BY ACQUIRING THE MEMBERSHIP  INTEREST
REPRESENTED BY THIS OPERATING AGREEMENT, EACH MEMBER REPRESENTS THAT IT WILL NOT
SELL OR OTHERWISE  DISPOSE OF ITS MEMBERSHIP  INTEREST  WITHOUT  REGISTRATION OR
OTHER  COMPLIANCE WITH THE AFORESAID ACTS AND THE RULES AND  REGULATIONS  ISSUED
THEREUNDER.
<PAGE>

                                TABLE OF CONTENTS
 

ARTICLE I - FORMATION OF THE COMPANY...........................................1
         1.1      Formation....................................................1
         1.2      Name.........................................................1
         1.3      Registered Office and Registered Agent.......................1
         1.4      Principal Place of Business..................................1
         1.5      Purposes and Powers..........................................1
         1.6      Term.........................................................2
         1.7      Nature of Members' Interests.................................2

ARTICLE II - DEFINITIONS.......................................................2
         2.1      Definitions..................................................2

ARTICLE III - MANAGEMENT OF THE COMPANY.......................................11
         3.1      The Managing Board..........................................11
         3.2      Specific Authority of the Managing Board....................11
         3.3      Limitation on Authority of Managing Board...................13
         3.4      Termination of the Management Agreement.....................14
         3.5      Specific Authority of Managing Board........................14
         3.6      Number, Term and Qualification..............................15
         3.7      Removal and Replacement.....................................15
         3.8      Authority as to Third Persons...............................15
         3.9      Compensation and Expenses...................................15
         3.10     Action by the Managing Board................................15
         3.11     Action Without Meeting.  ...................................16
         3.12     Meeting by Communications Device.  .........................16
         3.13     Authorized Representative of Company.  .....................16
         3.14     Indemnification of Managing Board Members and Sun.  ........16
         3.15     Limitation on Liability.  ..................................17
         3.16     Liability for Return of Capital Contribution.  .............17

ARTICLE IV - RIGHTS AND OBLIGATIONS OF MEMBERS................................17
         4.1      Names and Addresses of Members..............................17
         4.2      No Management by Members....................................17
         4.3      Election of Member Designees................................17
         4.4      Action by Members...........................................17
         4.5      Operation of Lithotripter System............................18
         4.6      Outside Activities..........................................18
         4.7      Disclosure of Confidential Information......................19
         4.8      Limited Liability...........................................20

ARTICLE V - CAPITAL CONTRIBUTIONS,
         GUARANTIES AND DILUTION OFFERINGS....................................20

                                                      -i-
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         5.1      Member's Contribution.......................................20
         5.3      Dilution Offerings..........................................20
         5.4      Conditions to the Capital Contributions of the Members......20
         5.5      Capital Accounts............................................21

ARTICLE VI - REPRESENTATIONS, WARRANTIES AND
         COVENANTS OF THE MANAGING BOARD......................................22
         6.1      Managing Board's Representations and Warranties.............22
         6.2      Managing Board's Covenants..................................22

ARTICLE VII - ALLOCATIONS, ELECTIONS AND REPORTS..............................22
         7.1      Profits and Losses..........................................22
         7.2      Sales Commission............................................23
         7.3      Nonrecourse Deductions......................................23
         7.4      Member Nonrecourse Deductions...............................23
         7.5      Allocations Between Transferor and Transferee...............23
         7.6      Gains from Capital Transactions.............................24
         7.7      Contributed Property........................................24
         7.8      Minimum Gain Chargeback.....................................24
         7.9      Member Minimum Gain Chargeback..............................24
         7.10     Qualified Income Offset.....................................25
         7.11     Gross Income Allocation.....................................25
         7.12     Section 754 Adjustment......................................25
         7.13     Curative Allocations........................................26
         7.14     Compliance with Treasury Regulations........................26
         7.15     Tax Withholding.............................................26

ARTICLE VIII - DISTRIBUTIONS..................................................26
         8.1      Company Cash Flow...........................................26
         8.2      Company Refinancing Proceeds................................26
         8.3      Company Sales Proceeds......................................26
         8.4      Distributions in Liquidation................................27
         8.5      Limitation Upon Distributions...............................27

ARTICLE IX - TRANSFER OF INTERESTS AND ADMISSION OF MEMBERS...................27
         9.1      Transferability of Membership Interests.....................27
         9.2      Restrictions on Transfers by Members........................28
         9.3      Rights of Transferee........................................28
         9.4      Admission of Members........................................29
         9.5      Amendment of Certificate of Formation and Qualification.....29
         9.6      Fundamental Changes.........................................29

ARTICLE X - OPTIONAL PURCHASE OF MEMBERSHIP INTERESTS
         ON CERTAIN EVENTS....................................................30

                                                      -ii-
<PAGE>

         10.1     Death.......................................................30
         10.2     Bankruptcy, Insolvency or Assignment for Benefit
                                        of Creditors of a Member..............31
         10.3     Default under Guaranties....................................32
         10.4     Breach of Section 4.6.......................................32
         10.5     Domestic Proceeding.........................................33
         10.6     Divestiture Option..........................................34
         10.7     Purchase Price..............................................35
         10.8     Closing of Purchase and Sale................................36
         10.9     Terms and Conditions of Purchase............................37

ARTICLE XI - DISSOLUTION AND LIQUIDATION OF THE COMPANY.......................37
         11.1     Dissolution Events..........................................37
         11.2     Continuation................................................38
         11.3     Liquidation.................................................38
         11.4     Certificate of Cancellation.................................39

ARTICLE XII - MISCELLANEOUS...................................................39
         12.1     Fiscal Year.................................................39
         12.2     Records.....................................................39
         12.3     Reports.....................................................39
         12.4     Reserves....................................................39
         12.5     Notices.....................................................39
         12.6     Amendments..................................................40
         12.7     Additional Documents........................................40
         12.8     Representations of Members..................................40
         12.9     Survival of Rights..........................................40
         12.10    Interpretation and Governing Law............................40
         12.11    Severability................................................40
         12.12    Agreement in Counterparts...................................40
         12.13    Tax Matters Partner.........................................41
         12.14    Third Parties...............................................41
         12.15    Power of Attorney...........................................41
         12.16    Arbitration.................................................41


Attachments:

Schedule I - Names,  Initial Capital  Contributions and Percentage  Interests of
the Members
                                                      -iii-
<PAGE>

                               OPERATING AGREEMENT

                                       OF

                       WASHINGTON UROLOGICAL SERVICES, LLC

THIS OPERATING AGREEMENT of WASHINGTON UROLOGICAL SERVICES, LLC (the "Company"),
a  limited  liability  company  organized  pursuant  to the  Washington  Limited
Liability   Company   Act,  is  executed   effective  as  of  the  ____  day  of
______________,  199__, by and among the Company and the persons  executing this
Agreement as the Members (as defined below).

                      ARTICLE I - FORMATION OF THE COMPANY

     1.1  Formation.  The  Company was formed on August 31, 1998 upon the filing
with the Secretary of State of the  Certificate of Formation of the Company.  In
consideration  of the mutual premises and covenants  contained  herein and other
good and valuable consideration,  the receipt and sufficiency of which is hereby
acknowledged,  the parties  hereto agree that the rights and  obligations of the
parties and the  administration and termination of the Company shall be governed
by this Agreement, the Certificate of Formation and the Act.

     1.2 Name. The name of the Company is as set forth on the cover page of this
Agreement.  The  Managing  Board may change the name of the Company from time to
time  as it  deems  advisable,  provided  that  appropriate  amendments  to this
Agreement and the  Certificate of Formation and necessary  filings under the Act
are first obtained.

     1.3 Registered Office and Registered Agent. The Company's registered office
shall be at 520  Pike  Street,  Seattle,  Washington  98101  and the name of its
initial registered agent at such address shall be the CT Corporation System.

     1.4 Principal  Place of Business.  The  principal  place of business of the
Company  shall be  located  at 15195  National  Avenue,  Suite  203,  Los Gatos,
California 95032, or at any other place or places as the Managing Board may from
time to time deem necessary or advisable.

     1.5 Purposes and Powers.

          (a) The purpose and business of the Company shall  be: (i) to operate
     one or more transportable lithotripters (or any other renal stone treatment
     equipment)  for the treatment of renal stones  primarily in the area of the
     State  of  Washington  west of the  Cascade  Mountains,  or in  such  other
     location(s) as the Managing Board may determine to be in the best interests
     of the  Company;  (ii) to  acquire  and  operate  in the  future  any other
     therapeutic  urological  device or equipment  provided  that such device or
     equipment has received FDA premarket approval at the time it is acquired by
     the  Company;  (iii)  to  acquire  an  interest  in  any  business  entity,
     including,  without limitation,  a limited  partnership,  limited liability
     company or corporation,  that engages in any business activity described in
     this Section
                                                      -1-
<PAGE>

          1.5;  and  (iv) to  engage  in any and all  activities  incidental  or
     related to the  foregoing,  upon and subject to the terms and conditions of
     this Agreement.

          (b) The Company  shall have any and all powers which are  necessary or
     desirable to carry out the  purposes  and  business of the Company,  to the
     extent the same may be legally  exercised  by limited  liability  companies
     under  the Act.  The  Company  shall  carry  out the  foregoing  activities
     pursuant to the  arrangements set forth in the Certificate of Formation and
     this Agreement.

          1.6 Term. The Company shall  continue in existence  until the close of
     the Company's  business on December 31, 2020, unless the Company is earlier
     dissolved  and its affairs wound up in  accordance  with the  provisions of
     this Agreement or the Act.

          1.7 Nature of Members'  Interests.  The  Membership  Interests  of the
     Members in the Company shall be personal  property for all purposes.  Legal
     title to all  Company  assets  shall  be held in the  name of the  Company.
     Neither  any  Member  nor a  successor,  representative  or  assign of such
     Member, shall have any right, title or interest in or to any Property owned
     by the Company or the right to partition any Property owned by the Company.
     Membership  Interests are  evidenced by the execution of this  Agreement by
     the Members.

                            ARTICLE II - DEFINITIONS

          2.1 Definitions. The following terms used in this Agreement shall have
     the following meanings (unless otherwise expressly provided herein):

          2.1.1"Act" means the Washington  Limited Liability Company Act, as the
     same may be amended from time to time.

          2.1.2 "Adjusted  Capital Account  Deficit" means,  with respect to any
     Member, the deficit balance, if any, in such Member's Capital Account as of
     the end of the relevant  Fiscal Year,  after giving effect to the following
     adjustments:

               (i)  Credit to such  Capital  Account  any  amounts to which such
          Member is obligated to restore or is deemed to be obligated to restore
          pursuant to the penultimate sentences of Treasury Regulations Sections
          1.704-2(g)(1) and 1.704-2(i)(5); and

               (ii)  Debit  to such  Capital  Account  the  items  described  in
          Sections  1.704-   1(b)(2)(ii)(d)(4),   1.704-1(b)(2)(ii)(d)(5),   and
          1.704-1(b)(2)(ii)(d)(6) of the Treasury Regulations.

The foregoing  definition  of Adjusted  Capital  Account  Deficit is intended to
comply  with the  provisions  of Section  1.704-1(b)(2)(ii)(d)  of the  Treasury
Regulations and shall be interpreted consistently therewith.

                                                      -2-
<PAGE>

               2.1.3 "Adjusted  Capital  Contributions"  means, as of any day, a
          Member's Capital Contributions adjusted as follows:

               (i) Increased by the amount of any Company  liabilities which, in
          connection  with  Distributions,  are  assumed  by such  Member or are
          secured by any Company Property distributed to such Member; and

               (ii)  Reduced by the amount of cash and the value of any  Company
          property  distributed to such Member and the amount of any liabilities
          of such  Member  assumed by the  Company  or which are  secured by any
          property contributed by such Member to the Company.

               In the event any Member  transfers  all or any  portion of his or
          her  Membership   Interest  in  accordance  with  the  terms  of  this
          Agreement, his or her transferee shall succeed to the Adjusted Capital
          Contribution  of  the  transferor  to the  extent  it  relates  to the
          transferred Membership Interest or portion thereof.

               2.1.4  "Affiliate"  of a specified  Person means  (i) any  Person
          directly or  indirectly  controlling,  controlled  by or under  common
          control  with  the  specified  Person;  (ii)  any  Person  owning  or
          controlling  10% or more of the  outstanding  voting  interest of such
          specified  Person;  (iii) any  officer,  director  or  partner of such
          specified  Person;  and  (iv) if the  specified  Person is an officer,
          director or partner, any entity for which the specified Person acts in
          such capacity.

               2.1.5 "Agreement" means this Operating Agreement, as amended from
          time to time.

               2.1.6  "Bank"  means First  Citizens  Bank & Trust  Company,  its
          successor in interest,  or any other commercial financial  institution
          providing financing to the Company.

               2.1.7  "Bankruptcy"  means with  respect  to a Member,  when such
          Member (i) makes an  assignment  for the  benefit of  creditors;  (ii)
          files a voluntary petition in bankruptcy; (iii) is adjudged a bankrupt
          or insolvent,  or has entered  against him or her an order for relief,
          in any bankruptcy or insolvency  proceeding;  (iv) files a petition or
          answer seeking for himself or herself any reorganization, arrangement,
          composition, readjustment,  liquidation, dissolution or similar relief
          under any  statute,  law or  regulation;  (v) files an answer or other
          pleading admitting or failing to contest the material allegations of a
          petition  filed  against  him or her in  any  proceeding  of the  type
          described in clauses  (i)-(iv)  above;  or (vi) seeks,  consents to or
          acquiesces in the appointment of a trustee,  receiver or liquidator of
          the Member or of all or any substantial part of his or her properties.
          "Bankruptcy"  shall  also be deemed to have  occurred  to a Member 120
          days after the  commencement  of any  proceeding  against  such Member
          seeking  reorganization,   arrangement,   composition,   readjustment,
          liquidation,  dissolution or similar relief under any statute,  law or
          regulation,  if the proceeding has not been dismissed, or if within 90
          days after the appointment  without his or her consent or acquiescence
          of a trustee,  receiver or  liquidator  of the Member or of all or any
          substantial  part of his or her  properties,  the  appointment  is not
          vacated or stayed,  or within 90 days after the expiration of any such
          stay, the appointment is not vacated.

               2.1.8 "Capital  Account" means,  with respect to any Member,  the
          capital account  maintained for such Member in accordance with Section
          5.5 of this Agreement.
                                                      -3-
<PAGE>

               2.1.9  "Capital  Contribution"  means  all  contributions  to the
          Company of cash or property  (valued for this purpose at initial gross
          fair market value as  determined  by the  contributing  Member and the
          Managing Board) made by a Member or his or her predecessor in interest
          which shall include,  without  limitation,  those  contributions  made
          pursuant to Article V of this Agreement.

               2.1.10 "Capital Transaction" means any transactions undertaken by
          the Company or by any company or partnership in which the Company owns
          an  interest,  which,  were it to  generate  proceeds,  would  produce
          Company Sales Proceeds or Company Refinancing Proceeds.

               2.1.11  "Certificate  of  Formation"  means  the  Certificate  of
          Formation of the Company filed with the Secretary of State, as amended
          or restated from time to time.

               2.1.12 "Code" means the Internal Revenue Code of 1986, as amended
          from  time to time (and any  corresponding  provisions  of  succeeding
          law).

               2.1.13  "Company  Cash Flow" for any period means the excess,  if
          any, of (A) the sum of (i) all gross receipts from any source for such
          period,  other  than from  Company  loans,  Capital  Transactions  and
          Capital Contributions, and (ii) any funds released by the Company from
          previously  established  reserves,  over  (B) the sum of (i) all  cash
          expenses  paid  by  the  Company  for  such  period   (including   any
          compensation to the Members and their  Affiliates);  (ii) all  amounts
          paid by the Company in such period on account of the  amortization  of
          the principal of any debts or  liabilities  of the Company  (including
          loans from any Member); (iii) capital expenditures of the Company; and
          (iv) a  reasonable  reserve  for future  expenditures  as  provided by
          Section 13.4; provided,  however,  that the amounts referred to in (B)
          (i),  (ii) and (iii)  above  shall be taken into  account  only to the
          extent  not  funded  by  Capital  Contributions,  loans or paid out of
          previously  established  reserves.  Such term shall also  include  all
          other funds  deemed  available  for  distribution  and  designated  as
          Company Cash Flow by the Managing Board.

               2.1.14  "Company  Minimum Gain" means gain as defined in Treasury
          Regulations Section 1.704-2(d).

          2.1.15 "Company Refinancing Proceeds" means (i) the cash realized from
     the financing or refinancing  of all or any portion of any Company  assets,
     less the  retirement  of any  related  secured  loans,  the  payment of all
     expenses  relating  to  the  transaction  and  the  establishment  of  such
     reasonable  reserves as the Managing  Board shall deem prudent or necessary
     and (ii) the Company's  allocable  portion of cash realized by an entity in
     which  the  Company  owns  an  interest  from  such  entity   financing  or
     refinancing all or any portion of such entity's assets, less the retirement
     of any related  secured  loans and the payment of all expenses  relating to
     such transaction.

          2.1.16  "Company Sales  Proceeds" means (i) the cash realized from the
     sale, exchange,  condemnation,  casualty or other disposition of all or any
     portion of any Company assets not in the ordinary course of business,  less
     the retirement of any related  secured  loans,  the payment of all expenses
     relating  to the  transaction  and the  establishment  of  such  reasonable
     reserves as the Managing Board shall deem prudent or necessary and (ii) the
     Company's  allocable  portion  of cash  realized  by an entity in which the
     Company owns an interest from the sale, exchange, condemnation, casualty or
     other
                                                      -4-
<PAGE>

          disposition  of all or any portion of such entity's  assets not in the
     ordinary  course of business,  less the  retirement of any related  secured
     loans and the payment of all expenses relating to such transaction.

          2.1.17  "Depreciation" means, for each Fiscal Year, an amount equal to
     the depreciation,  amortization, or other cost recovery deduction allowable
     with  respect to an asset for such  Fiscal  Year,  except that if the Gross
     Asset Value of an Asset differs from its adjusted  basis for federal income
     tax purposes at the beginning of such Fiscal Year, Depreciation shall be an
     amount  which bears the same ratio to such  beginning  Gross Asset Value as
     the federal income tax depreciation,  amortization,  or other cost recovery
     deduction for such Fiscal Year bears to such beginning  adjusted tax basis;
     provided,  however,  that if the  adjusted  basis for  federal  income  tax
     purposes  of an  asset  at the  beginning  of such  Fiscal  Year  is  zero,
     Depreciation  shall be determined  with reference to such  beginning  Gross
     Asset Value using any reasonable method selected by the Managing Board.

          2.1.18  "Dilution  Offering"  means,  as provided in Article V of this
     Agreement,  the future offering of additional  Membership  Interests in the
     Company by the Managing Board.  Except as otherwise  provided in Article V,
     any successful Dilution Offering will proportionately reduce the Percentage
     Interests of the then current Members in the Company.

          2.1.19 "Distribution" means any money or other property distributed to
     a Member with respect to the Member's  Membership  Interest,  but shall not
     include any payment to a Member for materials or services  rendered nor any
     reimbursement  to a Member for expenses  permitted in accordance  with this
     Agreement.

          2.1.20 "Domestic Proceeding" means any divorce, annulment,  separation
     or similar domestic proceeding between a married couple.

          2.1.21 "Encumbrance" means any lien, pledge,  encumbrance,  collateral
     assignment or hypothecation.

          2.1.22  "Equipment"  means the equipment to be acquired by the Company
     and used in the operation of the  Lithotripter  System including the mobile
     transport vehicle, the transportable lithotripter and miscellaneous medical
     equipment and supplies,  and any similar  additional  equipment acquired by
     the Company in the future.

          2.1.23 "FDA" means the United States Food and Drug Administration.

          2.1.24 "Fiscal Year" means an annual accounting period ending December
     31 of each year during the term of the Company,  unless otherwise specified
     by the Managing Board.

          2.1.25 "Gains from Capital  Transactions"  means the gains realized by
     the  Company  as a result of or upon any sale,  exchange,  condemnation  or
     other  disposition  of capital assets of the Company or any entity in which
     the Company shall own an interest  (which assets shall include Code Section
     1231 assets and all real and  personal  property) or as a result of or upon
     the damage to or destruction of such capital assets.

                                                      -5-
<PAGE>

          2.1.26  "Gross Asset  Value"  means,  with  respect to any asset,  the
     asset's adjusted basis for federal income tax purposes, except as follows:

               (i) The initial Gross Asset Value of any asset  contributed  by a
          Member to the  Company  shall be the gross fair  market  value of such
          asset,  as  determined  by the  contributing  Member and the  Managing
          Board,  provided that, if the  contributing  Member is a member of the
          Managing Board,  such Member shall abstain from the  determination  of
          the fair market value of a contributed asset;

               (ii) The  Gross  Asset  Values  of all  Company  assets  shall be
          adjusted  to equal  their  respective  gross fair  market  values,  as
          determined by the Managing Board, as of the following  times:  (a) the
          acquisition of an additional  interest in the Company (other than upon
          the initial formation of the Company) by any new or existing Member in
          exchange  for more than a de  minimis  Capital  Contribution;  (b) the
          distribution  by the  Company  to a Member of more  than a de  minimis
          amount of Company  property  as  consideration  for an interest in the
          Company;  and (c) the liquidation of the Company within the meaning of
          Treasury Regulations Section 1.704-1(b)(2)(ii)(g);  provided, however,
          that the  adjustments  pursuant  to clauses (a) and (b) above shall be
          made  only  if the  Managing  Board  reasonably  determine  that  such
          adjustments  are  necessary  or  appropriate  to reflect the  relative
          economic interests of the Members in the Company;

               (iii) The Gross Asset Value of any Company asset  distributed  to
          any Member  shall be adjusted to equal the gross fair market  value of
          such  asset  on  the  date  of   distribution  as  determined  by  the
          distributee and the Managing Board,  provided that, if the distributee
          is a member of the Managing Board,  such Member shall abstain from the
          determination of the fair market value of the distributed asset; and

               (iv) The Gross Asset Values of Company  assets shall be increased
          (or  decreased) to reflect any  adjustments  to the adjusted  basis of
          such assets  pursuant to Code Section  734(b) or Code Section  743(b),
          but only to the extent that such adjustments are taken into account in
          determining Capital Accounts pursuant to Treasury  Regulations Section
          1.704-1(b)(2)(iv)(m)   and  Sections   2.1.47(vi)   and  7.12  hereof;
          provided,  however,  that Gross  Asset  Values  shall not be  adjusted
          pursuant to this Section  2.1.26(iv) to the extent the Managing  Board
          determine that an adjustment  pursuant to Section 2.1.26(ii) hereof is
          necessary or appropriate in connection  with a transaction  that would
          otherwise result in an adjustment pursuant to this Section 2.1.26(iv).

          If the Gross Asset Value of an asset has been  determined  or adjusted
          pursuant  to  Section  2.1.26(i),   Section  2.1.26(ii),   or  Section
          2.1.26(iv) hereof, such Gross Asset Value shall thereafter be adjusted
          by the Depreciation  taken into account with respect to such asset for
          purposes of  computing  Profits,  Gains from Capital  Transactions  or
          Losses.

                                                      -6-
<PAGE>

               2.1.27 "Guaranty" means the Guaranty  Agreement pursuant to which
          each Member will  guarantee a portion of the  Company's  obligation to
          the Bank under the Loan. The form of Guaranty Agreement is included in
          the Subscription Packet accompanying the Memorandum.

               2.1.28  "Lithotripter  System" means the mobile transport vehicle
          and operational lithotripter.

               2.1.29  "Loan" means the loan of up to $550,000  from the Bank to
          the Company.  Loan proceeds will be used by the Company to (i) acquire
          a  transportable  lithotripter  with options  (estimated at $400,000),
          (ii)  acquire  and upfit a mobile van to  transport  the  lithotripter
          (estimated at $50,000),  (iii) pay the applicable  state sales and use
          taxes on the purchase of the  lithotripter  and van  (estimated  to be
          $38,700), and (iv) serve as working capital (estimated at $61,300).

               2.1.30  "Losses  from  Capital  Transactions"  means  the  losses
          realized  by the  Company  as a result of or upon any sales  exchange,
          condemnation or other disposition of the capital assets of the Company
          (which include Code Section 1231 assets) or as a result of or upon the
          damage or destruction of such capital assets.

               2.1.31 "Management Agent" means Sun Medical  Technologies,  Inc.,
          the initial management agent of the Company, and any other Person that
          succeeds such management agent in its capacity as management agent.

               2.1.32  "Management  Agreement"  means the agreement  pursuant to
          which the Management Agent will provide daily  management  services to
          the Company.

               2.1.33  "Majority  in  Interest"  means,   with  respect  to  any
          referenced group of Members, a combination of any of such Members who,
          in the aggregate,  own more than fifty percent (50%) of the Percentage
          Interests owned by all of such referenced group of Members.

               2.1.34  "Managing  Board" means the four person board of managers
          comprised of two designees  appointed by Sun and two designees elected
          by the non-Sun  affiliated  Members of the Company,  and which has the
          management authority set forth in Article III.

               2.1.35  "Member" means each Person  designated as a member of the
          Company on Schedule I hereto,  or any additional  member admitted as a
          member of the Company in accordance with Article IX.  "Members" refers
          to such Persons as a group.

               2.1.36  "Member  Minimum  Gain" means an amount,  with respect to
          each Member  Nonrecourse  Debt, equal to the Company Minimum Gain that
          would  result  if such  Member  Nonrecourse  Debt  were  treated  as a
          Nonrecourse   Liability,   determined  in  accordance   with  Treasury
          Regulations Section 1.704-2(i).

               2.1.37 "Member  Nonrecourse Debt" means any nonrecourse debt (for
          the purposes of Treasury  Regulations Section 1.1001-2) of the Company
          for which any Member  bears the  "economic  risk of loss,"  within the
          meaning of Treasury Regulations Section 1.752-2.

                                                      -7-
<PAGE>

               2.1.38  "Member  Nonrecourse   Deductions"  means  deductions  as
          described in Treasury  Regulations Section  1.704-2(i).  The amount of
          Member  Nonrecourse  Deductions  with respect to a Member  Nonrecourse
          Debt for any Fiscal  Year  equals the  excess,  if any, of (A) the net
          increase, if any, in the amount of Member Minimum Gain attributable to
          such Member  Nonrecourse  Debt during such Fiscal  Year,  over (B) the
          aggregate amount of any  Distributions  during that Fiscal Year to the
          Member  that  bears  the  economic   risk  of  loss  for  such  Member
          Nonrecourse  Debt  to the  extent  such  Distributions  are  from  the
          proceeds  of such  Member  Nonrecourse  Debt and are  allocable  to an
          increase  in  Member   Minimum  Gain   attributable   to  such  Member
          Nonrecourse Debt,  determined in accordance with Treasury  Regulations
          Section 1.704-2(i).

               2.1.39  "Membership  Interest"  means all of a Member's rights in
          the Company,  including without limitation,  the Member's share of the
          Profits and Losses of the Company, the right to receive Distributions,
          any right to vote and any right to  participate  in the  management of
          the Company as provided in the Act and this Agreement.

               2.1.40  "Memorandum"  means the  Confidential  Private  Placement
          Memorandum  of the Company  dated  December 21, 1998, as amended or as
          supplemented.

               2.1.41 "Nonrecourse  Deductions" means deductions as set forth in
          Treasury Regulations Section 1.704-2(b)(1).  The amount of Nonrecourse
          Deductions  for a given Fiscal Year equals the excess,  if any, of (A)
          the net increase, if any, in the amount of Company Minimum Gain during
          such Fiscal Year, over (B) the aggregate  amount of any  Distributions
          during such Fiscal Year of proceeds of a  Nonrecourse  Liability  that
          are  allocable  to an increase  in Company  Minimum  Gain,  determined
          according  to  the   provisions   of  Treasury   Regulations   Section
          1.704-2(h).

               2.1.42  "Nonrecourse  Liability" means any Company  liability (or
          portion  thereof)  for which no Member  bears  the  "economic  risk of
          loss," within the meaning of Treasury Regulations Section 1.752-2.

               2.1.43  "Offering"  means the  initial  offering  of Units in the
          Company pursuant to the Memorandum.

               2.1.44  "Percentage  Interest"  means  the  percentage  which the
          Capital  Contributions of a Member of the Company bears to the Capital
          Contributions  of all  Members.  As  provided in Article V, a Member's
          Percentage Interest may be reduced by a future Dilution Offering.  The
          Members' Percentage Interests in the Company as of the date hereof are
          as set forth in Schedule I attached hereto.  Any future adjustments in
          the Member's Percentage Interests, due to future Dilution Offerings or
          otherwise, will be reflected by revisions to Schedule I.

               2.1.45  "Person"  means an  individual,  a  foreign  or  domestic
          corporation,  a professional  corporation,  a  partnership,  a limited
          partnership,  a limited liability company, a foreign limited liability
          company, an unincorporated association, or other legal entity.

               2.1.46  "Prime"  means Prime Medical  Services,  Inc., a publicly
          held Delaware corporation and parent of Sun.

                                                      -8-
<PAGE>

               2.1.47  "Profits  and Losses"  means,  for each Fiscal  Year,  an
          amount equal to the Company's  taxable  income or loss for such Fiscal
          Year  (excluding  Gains  from  Capital  Transactions),  determined  in
          accordance  with Code Section  703(a) (for this purpose,  all items of
          income,  gain,  loss,  or deduction  required to be stated  separately
          pursuant to Code Section 703(a)(1) shall be included in taxable income
          or loss), with the following adjustments:

               (i) Any income of the Company that is exempt from federal  income
          tax and not  otherwise  taken into  account in  computing  Profits and
          Losses  pursuant  to this  definition  (excluding  Gains from  Capital
          Transactions) shall be added to such taxable income or loss;

               (ii)  Any   expenditures   of  the  Company   described  in  Code
          Section 705(a)(2)(B)   or   treated  as  Code   Section   705(a)(2)(B)
          expenditures     pursuant    to    Treasury     Regulations    Section
          1.704-1(b)(2)(iv)(i),   and  not  otherwise   taken  into  account  in
          computing  Profits or Losses  pursuant to this Section 2.1.47 shall be
          subtracted from such taxable income or loss;

               (iii) In the event the Gross Asset Value of any Company  asset is
          adjusted  pursuant to Section  2.1.26,  the amount of such  adjustment
          shall be taken into  account as gain or loss from the  disposition  of
          such asset for purposes of computing Profits or Losses;

               (iv)  Gain or loss  resulting  from any  disposition  of  Company
          property with respect to which gain or loss is recognized  for federal
          income tax purposes  shall be computed by reference to the Gross Asset
          Value of the property disposed of,  notwithstanding  that the adjusted
          tax basis of such property differs from its Gross Asset Value;

               (v) In lieu of the  depreciation,  amortization,  and other  cost
          recovery  deductions  taken into  account in  computing  such  taxable
          income or loss,  there shall be taken into  account  Depreciation  for
          such fiscal year or other  period,  computed  in  accordance  with the
          definition of Depreciation set out hereof;

               (vi) To the extent an adjustment to the adjusted tax basis of any
          Company asset  pursuant to Code Section  734(b) or Code Section 743(b)
          is    required    pursuant    to    Treasury    Regulations    Section
          1.704-1(b)(2)(iv)(m)(4)  to  be  taken  into  account  in  determining
          Capital  Accounts  as  a  result  of  a  distribution  other  than  in
          liquidation of a Member's interest in the Company,  the amount of such
          adjustment  shall be  treated  as an item of gain  (if the  adjustment
          increases the basis of the asset) or loss (if the adjustment decreases
          the basis of the asset) from the disposition of the asset and shall be
          taken into account for purposes of computing Profits or Losses;

               (vii) Notwithstanding any other provision of this Section 2.1.47,
          any items which are specially allocated pursuant to Sections 7.3, 7.4,
          7.8,  7.9,  7.10,  7.11,  7.12 or 7.13 hereof  shall not be taken into
          account in computing Profits or Losses.
                                                      -9-
<PAGE>

               The  amounts  of the  items  of  Company  income,  gain,  loss or
          deduction  available  to be specially  allocated  pursuant to Sections
          7.3,  7.4,  7.8,  7.9,  7.10,  7.11,  7.12 or  7.13  hereof  shall  be
          determined by applying rules  analogous to those set forth in Sections
          (i) through (vi) above.

               2.1.48  "Property"  means any and all  property  acquired  by the
          Company,   real  and/or  personal   (including,   without  limitation,
          intangible property).

               2.1.49 "Pro Rata Basis" means in connection with an allocation or
          distribution in proportion to the respective  Percentage  Interests of
          the class of Members to which reference is made.

               2.1.50 "Sales Agency  Agreement" means the sales agency agreement
          through  which  MedTech  Investments,  Inc., an Affiliate of Sun and a
          broker-dealer  company  registered  with the  Securities  and Exchange
          commission  and a member of the  National  Association  of  Securities
          Dealers,  Inc.  shall  offer and sell the  membership  interest of the
          Company pursuant to the Memorandum.

               2.1.51 "Sales Commission" means the $100.00 sales commission paid
          to MedTech Investments,  Inc. for each Unit sold to parties other than
          Sun and its Affiliates.

               2.1.52  "Secretary  of  State"  means the  Secretary  of State of
          Washington.

               2.1.53 "Service" means the Internal Revenue Service.

               2.1.54  "Service Area" means the  geographic  region in which the
          Company operations are expected to be conducted and which will include
          the area of the State of Washington west of the Cascade Mountains.

               2.1.55 "Sun" means Sun Medical  Technologies,  Inc., a California
          corporation  wholly  owned by  Prime,  and an  initial  Member  of the
          Company.

               2.1.56 "Tax Matters  Partner" means the Person  designated by the
          Managing  Board as the "tax matters  partner," as that term is defined
          in the Code.

               2.1.57  "Transfer"  means  sell,  assign,   transfer,   lease  or
          otherwise  dispose  of  property,   including  without  limitation  an
          interest in the Company.

               2.1.58  "Treasury  Regulations"  means the Income Tax Regulations
          and  Temporary  Regulations   promulgated  under  the  Code,  as  such
          regulations may be amended from time to time (including  corresponding
          provisions of succeeding regulations).

               2.1.59  "Units" means the 100 equal  membership  interests in the
          Company  offered  pursuant to the  Memorandum  for a price per Unit of
          $1,500  in  cash  and  personal   guaranty  of  1%  of  the  Company's
          obligations under the Loan.

               2.1.60  "Withdrawing  Member" has the  meaning  assigned to it in
          Article X.

                                                      -10-
<PAGE>

                     ARTICLE III - MANAGEMENT OF THE COMPANY

         3.1      The Managing Board.

                    (a) Except as otherwise  may be  expressly  provided in this
               Agreement, the Certificate of Formation or the Act, all decisions
               with respect to the management of the business and affairs of the
               Company  shall  be made by  action  of the  Managing  Board.  The
               Managing Board shall have full and complete authority,  power and
               discretion to manage and control the business of the Company,  to
               make all decisions regarding those matters and to perform any and
               all  other  acts  or  activities  customary  or  incident  to the
               management  of the  Company's  business,  except only as to those
               acts and things as to which  approval by the Members is expressly
               required  by this  Agreement.  The  Managing  Board may  delegate
               responsibility  for the  day-to-day  management of the Company to
               any Person retained by the Managing Board  (including  Members or
               their  Affiliates)  who shall have and  exercise on behalf of the
               Company all powers and rights  necessary or  convenient  to carry
               out such management responsibilities.

                    (b) The members of the Managing Board shall be under no duty
               to devote all of their time to the business of the  Company,  but
               shall devote only such time as they deem necessary to conduct the
               Company  business  and to operate  and  manage the  Company in an
               efficient manner.

                    (c)  The  Managing  Board  may  charge  to the  Company  all
               ordinary and necessary  costs and expenses,  direct and indirect,
               attributable  to the  activities,  conduct and  management of the
               business of the  Company.  The costs and  expenses to be borne by
               the  Company  shall   include,   but  are  not  limited  to,  all
               expenditures incurred in acquiring and financing the Equipment or
               other Company  property,  legal and accounting fees and expenses,
               salaries of  employees  of the  Company,  consulting  and quality
               assurance  fees  paid  to  independent   contractors,   insurance
               premiums and interest.

     3.2  Specific  Authority  of  the  Managing  Board.  Without  limiting  the
generality  of Section 3.1 above,  and except as  otherwise  prohibited  by this
Agreement or the Act,  the  Managing  Board shall have and exercise on behalf of
the  Company  all powers and rights  necessary  or  convenient  to carry out the
purposes of the Company.  Such powers shall  include,  without  limitation,  the
following:

     (a) To conduct the Offering and acquire the Lithotripter System;

     (b) Subject to the limitations set forth in Sections 3.3(f) and 3.3(h),  to
purchase,  hold, manage, lease, license and dispose of Company assets, including
the  purchase,  exchange,  trade,  or sale of Company  assets at such price,  or
amount,  for cash,  securities  or other  property  and upon such terms,  as the
Managing Board deems to be in the best interests of the Company;  provided, that
should  the  Company  assets be  exchanged  or traded  for  securities  or other
property (the  "Replacement  Property")  the Managing  Board shall have the same
powers with regard to the  Replacement  Property as it does towards the property
traded;

                                                      -11-
<PAGE>

     (c) To exercise the option of the Company to purchase a Member's Membership
Interest pursuant to Article X;

     (d)  To  determine  the  travel   itinerary  and  site  locations  for  the
Lithotripter System or other Company technology;

     (e) Subject to the limitations set forth in Section 3.3(g),  to acquire (i)
additional  Lithotripter Systems, (ii) any other assets related to the provision
of lithotripsy  treatment services, or (iii) any other assets or equipment or an
interest  in another  entity  consistent  with the  purposes  of the  Company as
provided in Section 1.5 (collectively,  the "Additional  Assets"), at such times
and at such price and upon such terms,  as the Managing Board deems to be in the
best interest of the Company;

     (f) Subject to the limitations set forth in Section 3.3(h), to borrow money
for any Company purpose and, if security is required therefor, to subject to any
security  device  any  portion  of  the  Property  of  the  Company,  to  obtain
replacements  of any  other  security  device,  to  repay,  in whole or in part,
refinance,  increase,  modify,  consolidate  or extend any  Encumbrance or other
security device;

     (g) To deposit,  withdraw, invest, pay, retain (including the establishment
of reserves) and distribute the Company funds in accordance  with the provisions
of this Agreement;

     (h)  To  consent  to  the  modifications,   renewal  or  extension  of  any
obligations  to the  Company  of any  Person  or of any  agreement  to which the
Company is a party or of which it is a beneficiary;

     (i) To enter into and carry out  contracts  and  agreements  and any or all
other documents and instruments,  and to do any and all such other things as may
be in furtherance of Company purposes or necessary or appropriate to the conduct
of the Company activities;

     (j)  Subject to the  limitations  set forth in Section  3.3(c),  to adjust,
compromise,  settle or refer to arbitration any claim against or in favor of the
Company,  and to  institute,  prosecute  and defend any  actions or  proceedings
relating to the Company, its business and property;

     (k) To make all decisions  related to principles  and methods of accounting
and federal income tax elections;

     (l)  Generally  to possess  and  exercise  any and all  rights,  powers and
privileges of managers under the Act and the laws of the State of Washington;

     (m) To do and  perform  all such  other  acts and  things  and to  execute,
acknowledge and deliver any and all other documents or instruments in connection
with any or all of the foregoing;

                                                      -12-
<PAGE>

     (n) To engage or retain  one or more  persons  to  perform  acts or provide
materials as may be required by the Company,  at the Company's  expense,  and to
compensate  such  person or persons at a rate to be set by the  Managing  Board,
provided that the  compensation  is at the then  prevailing rate for the type of
services and  materials  provided,  or both.  Any person,  whether a Member,  an
Affiliate of a Member or otherwise  may be employed or engaged by the Company to
render services and provide materials, including, but not limited to, management
services,   professional  services,   accounting  services,  quality  assessment
services,  legal services,  marketing services,  maintenance services or provide
materials; and if such person is a Member or an Affiliate of a Member, he or she
shall be  entitled  to,  and shall be paid  compensation  for said  services  or
materials, anything in this Agreement to the contrary notwithstanding,  provided
that  the  compensation  to be  received  for  such  services  or  materials  is
competitive  in  price  and  terms  with  then  prevailing  rate for the type of
services  and/or  materials  provided.  The Company,  pursuant to the terms of a
Management  Agreement,  will contract with the Management  Agent with respect to
the supervision and  coordination  of the management and  administration  of the
day-to-day  operations of the Lithotripter  System for an initial  quarterly fee
equal to 7.5% of Company net profits per calendar quarter. Costs incurred by the
Management  Agent in performing its duties as management  agent shall be paid as
agreed to by the Company and Management  Agent and as specifically  set forth in
the Management Agreement. The Company may also make arrangements with hospitals,
other  treatment  facilities  and  qualified  physicians  desiring  to  use  the
Lithotripter System for treatment of patients. Owning an interest in the Company
shall  not be a  condition  to using the  Lithotripter  System.  Subject  to the
limitations set forth in Section 4.6, any Person, whether a Member, an Affiliate
of a Member or otherwise, that contracts with the Company to render services and
provide materials, including the Management Agent and its Affiliates, may engage
in or  possess  an  interest  in  other  business  ventures  of any  nature  and
description  independently  or with others,  including,  but not limited to, the
operation of a mobile  lithotripsy  treatment  unit similar to the  Lithotripter
System,  whether  or not  such  business  ventures  are in  direct  or  indirect
competition with the Company, and neither the Company nor the Members shall have
any right by virtue of this Agreement in and to said independent  ventures or to
the income or profits derived therefrom; and

     (o) Subject to the limitations set forth in Sections 3.3(d) and 3.3(g),  to
cause the Company to engage in a Dilution Offering as provided in Section 5.3.

     3.3 Limitation on Authority of Managing Board.  Notwithstanding anything to
the contrary in this Agreement, the Managing Board shall undertake the following
actions upon  receiving  the prior written  consent of the Members  representing
two-thirds of the aggregate interests in the Company:

     (a) Any  act in  contravention  of this  Agreement  or the  Certificate  of
Formation;

     (b) Any act  which  would  make it  impossible  to  carry  on the  ordinary
business of the Company,  other than a transfer of all or  substantially  all of
the assets of the Company;

     (c) Confess a material  judgment against the Company in connection with any
threatened or pending legal action;
                                                      -13-
<PAGE>

     (d) Cause the  Company  to engage in a Dilution  Offering  as  provided  in
Section 5.3  pursuant to which the Percentage  Interests of the existing Members
are diluted by more than 15% in the aggregate; and

     (e)   Institute   and  carry  out  any  plan   providing  for  the  merger,
consolidation  or sale of Membership  Interests or any other actions outlined in
Section 9.6 hereof;

     (f) Sell any Company  assets in a single  transaction  or series of related
transactions with an aggregate fair market value in excess of $50,000;

     (g) Adopt the annual Company  capital and operating  budget,  including the
approval of the  Company's  Purchase  Price  Formula (as that term is defined in
Section  10.7),  provided,  that in the case of approvals  of Company  operating
budget  expenditures  involving  compensation  or  reimbursement  to  Members or
Affiliates of Members  engaged by the Company to render  services and/or provide
materials  (collectively,  the "Affiliated Contracting Parties"), the Affiliated
Contracting  Parties  shall  abstain from voting on the approval of such Company
expenditures;

     (h)  Incurring  any single  capital  expenditure  in excess of $50,000  not
contemplated in the Company's annual capital and operating  budget, or incurring
any long-term  debt or any single  borrowing of the Company in excess of $50,000
not contemplated in the Company's annual capital and operating budget;

     (i) Amend the Operating Agreement;

     (j) Modify the purposes of the  Company's  business as set forth in Section
1.5; or

     (k) Accept or reject the  Company's  right of first  refusal to provide the
Alternative  Services as described in Section 4.6 below  (provided  that Sun and
its Affiliates shall abstain from voting on such right of first refusal).

     3.4 Termination of the Management  Agreement.  Except as otherwise provided
herein or in the Management Agreement, the Company may, in the event such action
is in the best  interests  of the Company,  exercise its right to terminate  the
Management  Agreement and select a replacement  Management Agent for the Company
upon the prior written  consent of the Managing Board and a Majority in Interest
of the  Members.  In the event of a deadlock of the  Managing  Board  and/or the
Members,  the decision of whether or not to terminate the  Management  Agreement
shall be submitted  to binding  arbitration  in  accordance  with Section  12.16
hereof.

     3.5 Specific Authority of Managing Board. Notwithstanding Sections 3.1, 3.2
and 3.3, the Managing Board shall have and may exercise on behalf of the Company
the following powers:

     (a) To  prepare  or cause to be  prepared  reports,  statements  and  other
relevant information for distribution to Members; and

                                                      -14-
<PAGE>

     (b) To open  accounts  and  deposit and  maintain  funds in the name of the
Company in banks or savings and loan associations.

     3.6 Number,  Term and  Qualification.  The Managing  Board shall consist of
four (4)  managers,  comprised  of two  designees  appointed  by Sun  (the  "Sun
Designees")  and  two  designees  elected  annually  pursuant  to the  vote of a
Majority  in Interest of the Members  (excluding  Sun and its  Affiliates)  (the
"Member  Designees").  One of the  Sun  Designees,  as  determined  in the  sole
discretion  of Sun,  shall  serve as the  Chairman  of the  Managing  Board (the
"Chairman").  The Chairman shall only have the authority to act on behalf of the
Company  as  specifically  set  forth  herein,  or  as  otherwise  approved  and
authorized  by the  Managing  Board and  Members.  The Members  may,  upon their
unanimous consent,  change the number of managers serving on the Managing Board.
Each manager shall  continue to hold office until his or her death,  resignation
or removal and replacement by his or her designating party. Managers need not be
residents of the State of Washington  or Members of the Company,  and may be any
Person selected by Sun or the other Members (excluding Sun and its Affiliates).

     3.7 Removal and Replacement.  Sun and the other Members  (excluding Sun and
its  Affiliates)  may  remove  and  replace  one or  more  of  their  respective
designated managers at any time, with or without cause; provided,  however, that
written  notice of such  removal and  replacement  must be given to the Managing
Board and all  Members  at least  five (5) days  before  the  effective  date of
removal and replacement.

     3.8 Authority as to Third  Persons.  Notwithstanding  Sections 3.3, 3.4 and
3.5  the  signed  statement  of the  Chairman  reciting  that  he or she has the
authority or the necessary approvals of either the Managing Board or the Members
for any action,  as to any third  Person,  shall be  conclusive  evidence of the
authority  of the  Managing  Board to take that  action and of  compliance  with
Sections 3.3  or  3.4,  if  applicable.   Each  Member  will  promptly   execute
instruments  determined by the Managing  Board to be appropriate to evidence the
authority of the Managing Board to consummate any transaction  permitted by this
Agreement.

     3.9 Compensation and Expenses.  The members of the Managing Board shall not
receive any  compensation  from the Company  for  serving as  managers,  but all
expenses  incurred by the managers in connection  with their service as managers
will be paid or promptly  reimbursed by the Company.  Nothing  contained in this
Section  3.8 is  intended  to affect the  Percentage  Interest of a manager as a
Member or the  amounts  that may be payable to a manager by reason of his or her
respective Percentage Interests.

     3.10 Action by the Managing  Board.  Any action to be taken by the Managing
Board under this  Agreement may be taken at a meeting of the Managing Board held
on such terms,  and after such notice as the members of the  Managing  Board may
establish;  provided,  however,  that notice of a meeting of the Managing  Board
must be given to all  members  entitled to vote at the meeting at least five (5)
days before the date of the meeting. All of the members of the Managing Board in
office shall constitute a quorum for the transaction of business at a meeting of
the Managing Board,  and the affirmative vote of a three-fourths of such members
shall constitute the act of the Managing Board,  unless a different  affirmative
vote is otherwise specifically provided for herein. A Managing Board
                                                      -15-
<PAGE>

     member who is present at a meeting of the Managing Board at which action on
any  Company  matter is taken is deemed to have  assented  to the  action  taken
unless he or she  objects at the  beginning  of the meeting  (or  promptly  upon
arrival) to the holding,  or transacting of business at, the meeting,  or unless
his or her  dissent or  abstention  is entered in the  minutes of the meeting or
unless he or she shall file written  notice of his or her dissent or  abstention
to such action with the presiding  officer of the meeting before its adjournment
or with the Chairman  immediately after adjournment of the meeting. The right of
dissent  or  abstention  shall not apply to a member of the  Managing  Board who
voted in favor of such action.

     3.11 Action Without Meeting.  Unless otherwise  provided in this Agreement,
any action  required or permitted to be taken at a meeting of the Managing Board
may be taken  without a meeting  if the  action is taken by all  members  of the
Managing  Board.  Such action must be evidenced by one or more written  consents
signed by each member before or after such action,  describing the action taken,
and  included in the records of the Company.  Action taken  without a meeting is
effective when the last manager signs the consent,  unless the consent specifies
a different effective date.

     3.12 Meeting by Communications  Device.  Unless otherwise  provided in this
Agreement,  the Managing Board may permit any or all members to participate in a
meeting  by,  or  conduct  the  meeting   through  the  use  of,  any  means  of
communication by which all members  participating may  simultaneously  hear each
other during the meeting.  A member  participating in a meeting by this means is
deemed to be present in person at the meeting.

     3.13  Authorized  Representative  of Company.  Sun is hereby  appointed  an
authorized  representative  and agent of the Company and the Managing  Board for
the sole purpose of negotiating, making, entering and executing on behalf of the
Company any and all contracts and agreements and any or all other  documents and
instruments,  and to do any and all such  other  things as may be  necessary  or
appropriate  to conducting  and  consummating  the Offering.  Such actions shall
include,  but shall  not be  limited  to,  the  formation  of the  Company,  the
finalization  of the Loan  from the Bank,  the  offering  of Units to  investors
through the Sales Agent  pursuant to the Sales Agency  Agreement,  providing for
the  escrow  of the  Offering  proceeds  and  Guaranties  with  the Bank and the
termination thereof,  and the acceptance and rejection of investor  subscription
applications  for purchases of Units.  Upon the  termination of the Offering and
the  closing of the Loan by Sun,  the  authority  granted to it pursuant to this
Section 3.12 shall be null and void and become of no further force or effect.

     3.14  Indemnification  of Managing  Board  Members and Sun.  Subject to the
limitations  set forth in this Section 3.13,  all of the acts and deeds taken or
performed by Sun and its officers,  directors,  and employees in the name of the
Company while acting on behalf of the Company in conducting and consummating the
Offering as set forth in Section 3.12 above, shall, upon the completion thereof,
be ratified,  adopted and approved in all  respects as the duly  authorized  and
official acts and deeds of the Company. In addition, Sun, the Managing Board and
its  members  shall have no  liability  to the Company  which  arises out of any
action or inaction of Sun or the Managing  Board if Sun and the  Managing  Board
and its members in good faith  determined that such course of conduct was in the
best interest of the Company and such course of conduct did not constitute gross
negligence or willful misconduct of Sun, the Managing Board and its members. The
Company shall  indemnify  Sun and the members of the Managing  Board against any
direct and actual losses, liabilities, damages or
                                                      -16-
<PAGE>

     expenses (including court cost and reasonable attorney's fees but excluding
consequential  damages) that Sun and any of the members incur in connection with
the  Company  but only to the  extent  that such  parties  acted in good  faith,
without gross negligence,  and in a manner reasonably believed to be in the best
interests of the  Company.  Any  attorney's  fees or other  litigation  expenses
incurred  by Sun or a member of the  Managing  Board  shall be  advanced to such
party within thirty (30) days of receipt of a written demand therefor,  together
with an  undertaking  by or on behalf of the party to repay to the Company  such
amount if it is  ultimately  determined  that such party is not  entitled  to be
indemnified by the Company pursuant to this Section 3.13.

     3.15  Limitation  on  Liability.  No member of the Managing  Board shall be
liable to the  Company  for  monetary  damages  for an act or  omission  in such
person's  capacity as a manager,  except for (i) acts or omissions  that involve
intentional  misconduct or a knowing  violation of law;  (ii) any  distributions
received  from the Company in violation  of the Act;  and (iii) any  transaction
from  which a manager  derived  an  improper  personal  benefit.  Any  repeal or
modification of this section shall not adversely  affect the right or protection
of a director existing at the time of such repeal or modification.

     3.16 Liability for Return of Capital  Contribution.  The Managing Board and
its members shall not be liable for the return of the Capital  Contributions  of
the Members,  and upon dissolution,  the Members shall look solely to the assets
of the Company.

                 ARTICLE IV - RIGHTS AND OBLIGATIONS OF MEMBERS

     4.1 Names and Addresses of Members.  The names,  addresses  and  Percentage
Interests of the Members are as reflected in Schedule I attached hereto and made
a part hereof, which Schedule shall be amended by the Company upon the effective
date of any Transfer or subsequent issuance of any Membership Interest.

     4.2 No  Management  by Members.  The  Members in their  capacity as Members
shall not take part in the  management or control of the business,  nor transact
any business  for the Company,  nor shall they have power to sign for or to bind
the Company. The Company may, however,  contract with one or more Members to act
as the local medical  director(s)  for the  Lithotripter  System.  No Member may
withdraw from the Company except as expressly permitted herein.

     4.3  Election  of Member  Designees.  The  Members  (excluding  Sun and its
Affiliates),  pursuant  to a vote of a Majority  in  Interest,  shall  elect two
managers annually to serve on the Managing Board. The Members (excluding Sun and
its Affiliates)  shall have the power to remove and replace such managers as set
forth in Section 3.6.

     4.4 Action by Members.  Any action to be taken by the Members under the Act
or this  Agreement  may be taken (i) at a meeting  of the  Members  held on such
terms,  and after such notice as the  Managing  Board may  establish;  provided,
however,  that  notice  of a meeting  of  Members  must be given to all  Members
entitled  to vote at the  meeting at least five (5) days  before the date of the
meeting, or (ii) by written action of either the Members representing two-thirds
of the aggregate  interests in the Company or a Majority in Interest,  whichever
is applicable; provided, however, that any action requiring

                                                      -17-
<PAGE>

     the consent of all Members under the Act or this Agreement taken by written
action must be signed by all Members. No notice need be given of action proposed
to be taken by written action,  or an approval given by written  action,  unless
specifically required by this Agreement or the Act. Such written actions must be
kept with the records of the Company.

     4.5  Operation of  Lithotripter  System.  The Members  shall not operate or
utilize the  Lithotripter  System or other Company  equipment except pursuant to
(i) an agreement with the Company;  or (ii) any other  arrangement  specifically
approved by the Managing Board.

     4.6 Outside Activities. The Members agree that they owe fiduciary duties to
the  Company  and,  as a  consequence,  each  Member  agrees  that he, she or it
(including his, her or its Affiliates) shall not engage in "Outside  Activities"
(as defined  below) in the  Service  Area while he, she or it is a Member of the
Company,  except as otherwise  provided below.  The phrase "Outside  Activities"
means directly or indirectly  owning,  leasing or subleasing a lithotripter  (or
any  similar  equipment  or  competing  devices  used for  treating  renal stone
disease) or any other urological  therapeutic equipment acquired by the Company.
Prohibited  indirect ownership shall include the direct or indirect ownership of
any  interest  in a  business  venture  (through  stock  ownership,  partnership
interest  ownership,  ownership  by or  through  a close  family  member,  or as
otherwise  determined  in  good  faith  by the  Managing  Board)  involving  the
ownership,  purchase, lease, sublease,  promotion,  management or operation of a
lithotripter (or similar  equipment or competing devices used for treating renal
or biliary  stone  disease),  unless the  Managing  Board  determines  that such
activity by the Members is not detrimental to the best interests of the Company.

     Upon the termination or transfer of a Member's  interest in the Company for
any reason (including a transfer pursuant to Section 10.4 hereof),  other than a
material  breach of this Agreement by the Company which is not cured in a timely
manner,  the  withdrawing  Member  shall  not,  for a  period  of two (2)  years
following  the  date  of  his,  her or its  withdrawal,  engage  in any  Outside
Activities in the Service Area.

     In the event a Member  wishes and intends to engage in an Outside  Activity
in the Service Area, he, she or it must provide written notice of such intent to
the Managing Board prior to engaging in the Outside Activity. The written notice
shall be deemed an  election by the Member to  withdraw  from the  Company  (the
"Notice of  Withdrawal"),  and shall give the  Company  the  purchase  rights as
provided in Section  10.4  hereof.  After the Notice of  Withdrawal,  the former
Member may engage in an Outside  Activity in the Service Area only after waiting
the period of two years specified in this Section 4.6. In the event of breach of
the waiting period, the Company shall be entitled to any remedy at law or equity
with respect to such breach,  including without limitation an injunction or suit
for damages.

     If a Member during his, her or its  participation in the Company engages in
an Outside  Activity in the Service Area without  first  notifying  the Managing
Board in violation of this Section 4.6, the Member shall be deemed to have given
a Notice of Withdrawal on the date the Managing Board first becomes aware of the
Member's  Outside Activity in the Service Area. Upon receiving a Member's Notice
of Withdrawal or equivalent thereof,  the Company may invoke the purchase rights
provided in Section  10.4 and shall be  entitled  to any other  remedy at law or
equity including without limitation an injunction or suit for damages.

                                                      -18-
<PAGE>

     Notwithstanding  any provisions of this Section 4.6 to the contrary,  it is
understood and agreed by the parties hereto that Sun and its Affiliates,  to the
extent  permitted  by  contract  and  applicable  laws,  will  at  the  earliest
practicable date after the date hereof cease to provide lithotripsy  services at
any location in the Service Area and will use their  reasonable  best efforts to
either terminate their existing  contracts and assist the Company in negotiating
new  contracts  on its own  behalf  with such  facilities  in the  Service  Area
currently being served by Sun or its  Affiliates,  or assign all related service
contracts from such discontinued operations to the Company.  However, in certain
limited  circumstances  it may be in  the  best  interest  of  the  Company  (as
determined  by the Managing  Board) for Sun, or an Affiliate of Sun, to contract
directly  with a hospital or other  treatment  facility as agent for the Company
and such activities shall not be deemed a violation of this Section 4.6. In such
circumstances Sun or its Affiliate (as the case may be) will contract solely for
the  benefit  of the  Company,  and  unless  otherwise  agreed to by Sun (or its
Affiliate) and the Managing Board,  Sun (or its Affiliate) shall not receive any
compensation as a result of such agreements.

     In  addition,  in the event Sun or its  Affiliates  desire to expand any of
their  urological  medical  treatment  services in the  Service  Area to include
services  using  equipment  other  than   lithotripsy   equipment   (other  than
replacement  parts or models for Sun's or its Affiliates'  existing  lithotripsy
equipment  in the  Service  Area)  (the  "Alternative  Services"),  Sun,  or its
Affiliate,  as the case may be,  shall give  written  notice of such intent (the
"Notice of Intent") to the Managing Board prior to engaging in such  Alternative
Services.  Upon receiving the Notice of Intent,  the Company shall have a 60-day
right of first refusal to provide the Alternative Services on the same terms and
conditions  as Sun, or its  Affiliate,  proposes to provide  them in the Service
Area. Upon the expiration of the Company's  right of first refusal,  Sun, or its
Affiliate,  as the case may be, may commence providing the Alternative  Services
and neither  the Company nor the Members  shall have any right by virtue of this
Agreement in and to the income or profits derived therefrom.

     4.7 Disclosure of Confidential  Information.  Each Member  acknowledges and
agrees that his, her or its  participation  in the Company under this  Agreement
necessarily  involves  his,  her or its  understanding  of and access to certain
trade secrets and other confidential  information  pertaining to the business of
the Company.  Accordingly,  each Member agrees that at all times during his, her
or its  participation  in the Company as a Member and thereafter,  he, she or it
will not,  directly or indirectly,  without the express written authority of the
Company,  unless  required by law or directed by a  applicable  legal  authority
having  jurisdiction  over the  Member,  disclose  or use for the benefit of any
person,  corporation  or other  entity  (other  than the  Company),  or himself,
herself or itself, (i) any trade,  technical,  operational,  management or other
secrets,  any patient or customer lists or other confidential or secret data, or
any other proprietary, confidential or secret information of the Company or (ii)
any  confidential  information  concerning  any of the  financial  arrangements,
financial  positions,   hospital  or  physician  contracts,  third  party  payor
arrangements,  quality  assurance  and outcome  analysis  programs,  competitive
status, customer or supplier matters, internal organizational matters, technical
abilities,  or other business affairs of or relating to the Company. The Members
acknowledge that all of the foregoing constitutes proprietary information, which
is the  exclusive  property  of the  Company.  The  obligations  imposed in this
Section 4.7  shall not apply to information  that is in the public domain at the
time of  disclosure or is known by the Member  independently  of his, her or its
participation  in the  Company.  In the event of breach of this  Section  4.7 as
determined by the Managing Board, the Company shall be entitled to any
                                                      -19-
<PAGE>

     remedy at law or equity  with  respect to such  breach,  including  without
limitation, an injunction or suit for damages.

     4.8 Limited Liability. No Member shall be required to make any contribution
to the  capital of the  Company  except as set forth in Article V, nor shall any
Member in his,  her or its  capacity as such be bound by, or  personally  liable
for, any expense, liability or obligation of the Company except to the extent of
his,  her  or its  (i)  interest  in the  Company,  (ii) Guaranties  of  Company
obligations, and (iii) obligation to return Distributions made to him, her or it
under certain circumstances as required by the Act.


                       ARTICLE V - CAPITAL CONTRIBUTIONS,
                        GUARANTIES AND DILUTION OFFERINGS

     5.1 Member's  Contribution.  Each Member hereby  agrees to  contribute  and
shall  contribute  to the capital of the Company on the date of his,  her or its
admission to the Company the cash amount set forth opposite his, her or its name
on Schedule I attached hereto.

     5.2 No Interest.  Except as otherwise provided herein, no interest shall be
paid on any contribution to the capital of the Company.

     5.3 Dilution  Offerings.  Subject to the  limitations  set forth in Section
3.3(d),  if the Managing Board determines that it is in the best interest of the
Company,  the Managing Board may, from time to time, cause the Company to issue,
offer and sell  additional  Membership  Interests  in the  Company (a  "Dilution
Offering")  to  local  urologists  who  are  not  already  Members   ("Qualified
Investors").  The primary  purpose of any  Dilution  Offering  would be to raise
additional  capital for any legitimate  Company  purpose as set forth in Section
1.5.  Any  Membership  Interests  offered by the Company in a Dilution  Offering
shall be sold in the manner and  according to the terms  prescribed  in the sole
discretion  of the  Managing  Board;  provided,  however,  that  any  additional
Membership  Interests offered in a Dilution Offering will be sold for a purchase
price per 1% Membership  Interest  determined by the Purchase  Price Formula set
forth in Section 10.7.  The parties hereto agree that the Purchase Price Formula
shall  reflect the fair market value of a  Membership  Interest and the Purchase
Price  Formula  shall be subject to  revision  from time to time as set forth in
Section 3.3(g). Any sale of additional  Membership  Interests will result in the
proportionate  dilution  of the Company  Percentage  Interests  of the  existing
Members.  Any investor  acquiring a Membership  Interest in a Dilution  Offering
shall  agree  to be  bound  by  the  terms  of  this  Agreement,  and  shall  be
automatically  admitted  as a Member of the  Company  notwithstanding  any other
provisions  in this  Agreement to the contrary.  Any  adjustment in the Members'
Percentage  Interests  resulting from a Dilution  Offering shall be set forth on
Schedule I attached hereto.

     5.4 Conditions to the Capital  Contributions of the Members. The obligation
of the Members to make cash Capital  Contributions  hereunder are subject to the
condition that the representations,  warranties, agreements and covenants of the
Managing  Board set forth in Article VI of this  Agreement are and shall be true
and correct or have been and will have been complied with in all
                                                      -20-
<PAGE>

     material respects on the date such Capital Contributions are required to be
made, except to the extent that any such  representation  or warranty  expressly
pertains to an earlier date.

     5.5 Capital  Accounts.  A Capital  Account  shall be  established  for each
Member and shall be credited with each Member's Capital  Contributions  pursuant
to Section 5.1. All  contributions  of property to the Company by a Member shall
be valued and credited to the Member's  Capital Account at such property's gross
fair market value on the date of contribution as determined by the  contributing
Member and the Managing Board.  All  distributions  of Property to the Member by
the Company shall be valued and debited against the Member's  Capital Account at
such  Property's  gross  fair  market  value  on the  date  of  distribution  as
determined by the Managing  Board.  Each Member's  Capital  Account shall at all
times be determined  and  maintained  pursuant to the principles of this Section
5.5 and Treasury  Regulations Section  1.704-1(b)(2)(iv).  A Member shall not be
entitled to withdraw any part of his or her Capital  Account except as otherwise
specifically  provided herein.  Each Member's Capital Account shall be increased
in accordance with such Regulations by:

     (i)  The  amount  of  Profits  allocated  to the  Member  pursuant  to this
Agreement;

     (ii) The amount of all Gains From  Capital  Transactions  allocated  to the
Member pursuant to this Agreement; and

     (iii) The amount of any Company  liabilities assumed by the Member or which
are secured by any Company property distributed to such Member.

     Each Member's  Capital  Account shall be decreased in accordance  with such
Regulations by:

     (i)  The  amount  of  Losses  allocated  to the  Member  pursuant  to  this
Agreement;

     (ii) The amount of Company Cash Flow  distributed to the Member pursuant to
this Agreement;

     (iii) The amount of Company Sales Proceeds and Company Refinancing Proceeds
distributed to the Member pursuant to this Agreement; and (iv) The amount of any
liabilities  of the Member  assumed by the  Company or which are  secured by any
property contributed by such Member to the Company.

     In addition,  each Member's  Capital Account shall be subject to such other
adjustments  as may be  required  in order to comply  with the  capital  account
maintenance requirements of Section 704(b) of the Code.

     In the event that the Managing Board shall  determine that it is prudent to
modify  the  manner in which the  Capital  Accounts,  or any  debits or  credits
thereto  (including,   without   limitation,   debits  or  credits  relating  to
liabilities that are secured by contributed or distributed  property or that are
assumed by the  Company or the  Members),  are  computed in order to comply with
such  Treasury  Regulations,  the  Managing  Board may make  such  modification,
provided that it is not likely to have a material effect
                                                      -21-
<PAGE>

     on the amounts distributable to any Member upon dissolution of the Company.
The Managing  Board also shall (i) make any  adjustments  that are  necessary or
appropriate to maintain equality between the Capital Accounts of the Members and
the amount of Company  capital  reflected on the  Company's  balance  sheet,  as
computed for book  purposes,  in accordance  with Treasury  Regulations  Section
1.704- 1(b)(2)(iv)(g),  and (ii) make any appropriate modifications in the event
unanticipated  events might  otherwise  cause this  Agreement not to comply with
Treasury Regulations Section 1.704-1(b).

                  ARTICLE VI - REPRESENTATIONS, WARRANTIES AND
                         COVENANTS OF THE MANAGING BOARD

     6.1 Managing  Board's  Representations  and Warranties.  The Managing Board
hereby represents and warrants to the Members that:

     (a) The Company is a limited  liability  company formed in accordance  with
and validly existing under the Act and the other applicable laws of the State of
Washington;

     (b) The  interest  in the  Company  of the  Members  will  have  been  duly
authorized or created and validly  issued and the Members shall have no personal
liability to contribute money to the Company other than the amounts agreed to be
contributed by them in the manner and on the terms set forth in this  Agreement,
subject, however, to such limitations as may be imposed under the Act; and

     (c) No material  breach or default  adverse to the Company exists under the
terms of any other material agreement affecting the Company.

     6.2 Managing Board's Covenants.  The Managing Board hereby covenants to the
Members that:

     (a) It will at all times act in a  fiduciary  manner  with  respect  to the
Company and the Members.

     (b) It will cause the Company to carry adequate public liability,  property
damage and other  insurance  as is customary in the business to be engaged in by
the Company.

                ARTICLE VII - ALLOCATIONS, ELECTIONS AND REPORTS

     7.1 Profits and Losses.

     (a) Except as otherwise provided herein,  Profits and Losses of the Company
and all items of tax  credit and tax  preference  shall be  allocated  among the
Members in
                                                      -22-
<PAGE>

     accordance with their  respective  Percentage  Interests.  In the event the
Percentage  Interests  vary during any Fiscal  Year,  Profits and Losses and all
items of tax credit and tax  preference  for such Fiscal Year shall be allocated
among the Members as provided in Section 7.5 below.

     (b) Losses  allocated  pursuant  to this  Section  7.1 shall not exceed the
maximum amount of Losses that can be so allocated  without causing any Member to
have an Adjusted  Capital  Account Deficit at the end of any Fiscal Year. In the
event  some but not all of the  Members  would  have  Adjusted  Capital  Account
Deficits  as  a  consequence  of  an  allocation  of  Losses  pursuant  to  this
Section 7.1,  the limitation set forth in this Section 7.1 shall be applied on a
Member by Member  basis so as to allocate  the maximum  possible  Losses to each
Member under Section 1.704-1(b)(2)(ii)(d) of the Treasury Regulations.

     7.2  Sales  Commission.  The Sales  Commission  shall be  allocated  to the
Members holding Units to the extent such Members paid the Sales Commission,  and
in proportion to their  respective  capital  contributions  represented  by such
Units (i.e.,  $100 in Sales  Commission per each such Unit). The purpose of this
Section 7.2 is to allocate the Sales  Commission  to those  Members who actually
bore the burden of paying the Sales Commission.

     7.3 Nonrecourse Deductions. Nonrecourse Deductions shall be allocated among
the Members in accordance with their respective Percentage Interests.

     7.4 Member Nonrecourse Deductions.  Any Member Nonrecourse Deductions shall
be specially  allocated  to the Member who bears the economic  risk of loss with
respect  to the  Member  Nonrecourse  Debt  to  which  such  Member  Nonrecourse
Deductions are  attributable  in accordance  with Treasury  Regulations  Section
1.704-2(i).

     7.5  Allocations  Between  Transferor and  Transferee.  In the event of the
transfer of all or any part of a Member's  Membership  Interest  (in  accordance
with the  provisions  of this  Agreement) at any time other than at the end of a
Fiscal Year, the change in any Member's  Percentage Interest or the admission of
a new Member (in accordance with the terms of this Agreement),  the transferring
Member or new Member's share of the Company's income, gain, loss, deductions and
credits,  as computed both for  accounting  purposes and for federal  income tax
purposes,  shall be allocated  between the transferor  Member and the transferee
Member, or the new Member and the other Members, as the case may be, in the same
ratio as the number of days in such Fiscal Year before and after the date of the
transfer or admission; provided, however, that if there has been a sale or other
disposition  of the assets of the  Company  (or any part  thereof)  during  such
Fiscal Year,  then upon the mutual  agreement of all the Members  (excluding the
new Member and the  transferring  Member),  the Company  shall treat the periods
before and after the date of the transfer or admission as separate  Fiscal Years
and allocate the Company's net income,  gain,  net loss,  deductions and credits
for each of such deemed  separate  Fiscal Years of the Company.  Notwithstanding
the foregoing,  the Company's "allocable cash basis items," as that term is used
in Section  706(d)(2)(B) of the Code,  shall be allocated as required by Section
706(d)(2) of the Code and the Treasury Regulations thereunder.

                                                      -23-
<PAGE>

     7.6 Gains from Capital Transactions. Gains from Capital Transactions during
any Fiscal Year shall be allocated as follows:

     (a) First, to those Members whose Capital Accounts immediately prior to the
Capital  Transaction  were  negative,  in an amount  sufficient  to increase the
Capital  Accounts to zero, but in the event sufficient gain is not recognized to
do so,  then  among  them  pro rata in  proportion  to  their  negative  Capital
Accounts;

     (b) Second, to the Members in an amount equal to the difference between the
Company Sales  Proceeds to be  distributed to each of the Members as provided in
Section 8.3 and the Capital  Accounts of each respective  Member as adjusted (if
necessary)  by  paragraph  (a) above,  but in the event  sufficient  gain is not
recognized to do so, then among the Members in an amount which, when credited to
the Capital  Accounts of the Members,  results in the Members'  Capital Accounts
bearing  the same  ratio to one  another  as the  ratio of the  distribution  of
Company Sales  Proceeds to each of the Members,  as provided in Section 8.3; and
thereafter

     (c) Any remaining  gain shall be allocated  among the Members in accordance
with  their  respective  Percentage  Interests  as of the  date  of the  Capital
Transaction giving rise to the gain.

     7.7  Contributed  Property.  In accordance with Code Section 704(c) and the
Treasury Regulations  thereunder,  income, gain, loss and deduction with respect
to any property  contributed to the capital of the Company shall, solely for tax
purposes,  be allocated among the Members so as to take account of any variation
between the adjusted  basis of such  property to the Company for federal  income
tax purposes and its initial Gross Asset Value at the time of contribution.

     Any elections or other decisions relating to such allocations shall be made
by the Members in any manner that reasonably  reflects the purpose and intention
of this  Agreement.  Allocations  pursuant  to this  Section  7.7 are solely for
purposes of federal,  state and local taxes and shall not affect,  or in any way
be taken into account in  computing,  any Member's  Capital  Account or share of
Profits,  Losses, other items or Distributions pursuant to any provision of this
Agreement.

     7.8 Minimum Gain Chargeback.  If there is a net decrease in Company Minimum
Gain during any Fiscal Year,  each Member shall be specially  allocated items of
Company  income and gain for such Fiscal  Year (and,  if  necessary,  subsequent
years) in an amount equal to such Member's  share of the net decrease in Company
Minimum  Gain,   determined  in  accordance  with  Treasury  Regulation  Section
1.704-2(g).  Allocations  pursuant  to the  previous  sentence  shall be made in
proportion  to the  respective  amounts  required to be allocated to each Member
pursuant thereto. The items to be so allocated shall be determined in accordance
with Treasury Regulations  Sections 1.704-2(f) and 1.704- 2(j)(2).  This Section
7.8 is  intended  to comply  with the minimum  gain  chargeback  requirement  in
Treasury Regulation 1.704-2(f) and shall be interpreted consistently therewith.

     7.9 Member  Minimum Gain  Chargeback.  If there is a net decrease in Member
Minimum Gain  attributable to a Member  Nonrecourse Debt, as defined in Treasury
Regulation Section 1.704- 2(i)(4), during any Fiscal Year, each Member who has a
share of the Member Minimum Gain

                                                      -24-
<PAGE>

     attributable to such Member Nonrecourse Debt, determined in accordance with
Treasury Regulation Section 1.704-2(i)(5), shall be specially allocated items of
Company  income and gain for such Fiscal  Year (and,  if  necessary,  subsequent
Fiscal Years) in an amount equal to such  Member's  share of the net decrease in
Member Minimum Gain attributable to such Member Nonrecourse Debt,  determined in
accordance with Treasury Regulation Section  1.704-2(i)(4) and (5).  Allocations
pursuant to the previous  sentence shall be made in proportion to the respective
amounts required to be allocated to each Member pursuant  thereto.  The items to
be so allocated  shall be  determined in  accordance  with Treasury  Regulations
Section  1.704-2(i)(4).  This  Section 8.8 is intended to comply with the Member
Minimum Gain chargeback  requirement in Treasury Regulation  Section 1.704(i)(4)
and shall be interpreted consistently therewith.

     7.10  Qualified  Income  Offset.  If any Member  unexpectedly  receives  an
adjustment,  allocation  or  distribution  as described in Treasury  Regulations
Section  1.704-1(b)(2)(ii)(d)(4) through (6) which causes or increases a deficit
Capital  Account  balance in such  Member's  Capital  Account (as  determined in
accordance  with such  Regulation),  items of  Company  income and gain shall be
specially  allocated to each such Member in an amount and manner  sufficient  to
eliminate,  to the extent  required by the  Regulations,  the  Adjusted  Capital
Account  Deficit  of such  Member  as  quickly  as  possible,  provided  that an
allocation pursuant to this Section 7.10 shall be made if and only to the extent
that such Member would have an Adjusted  Capital Account Deficit after all other
allocations  provided for in this Article VII have been  tentatively  made as if
this Section 7.10 were not in this Agreement. This provision is intended to be a
"qualified  income  offset," as defined in Treasury  Regulation  Section  1.704-
1(b)(2)(ii)(d),  such  Regulation  being  specifically  incorporated  herein  by
reference.

     7.11 Gross Income Allocation. In the event any Member has a deficit Capital
Account at the end of any  Fiscal  Year which is in excess of the sum of (i) the
amount such Member is obligated  to restore,  and (ii) the amount such Member is
deemed to be  obligated  to restore  pursuant to the  penultimate  sentences  of
Treasury Regulations Sections 1.704-2(g)(1) and 1.704-2(i)(5),  each such Member
shall be specially  allocated  items of Company income and gain in the amount of
such excess as quickly as possible, provided that an allocation pursuant to this
Section 7.11 shall be made if and only to the extent that such Member would have
a deficit  Capital  Account  in  excess of such sum after all other  allocations
provided for in this Article VII have been  tentatively  made as if this Section
7.11 and Section 7.10 hereof were not in this Agreement.

     7.12 Section 754  Adjustment.  To the extent an  adjustment to the adjusted
tax basis of any Company asset  pursuant to Code Section  734(b) or Code Section
743(b)   is    required,    pursuant    to    Treasury    Regulations    Section
1.704-1(b)(2)(iv)(m)(2)     or    Treasury     Regulations     Section    1.704-
1(b)(2)(iv)(m)(4),  to be taken into account in determining  Capital Accounts as
the result of a Distribution to a Member in complete liquidation of his interest
in the Company,  the amount of such adjustment to the Capital  Accounts shall be
treated as an item of gain (if the adjustment  increases the basis of the asset)
or loss (if the adjustment  decreases such basis) and such gain or loss shall be
specially  allocated to the Members in  accordance  with their  interests in the
Company in the event that Treasury  Regulations Section  1.704-1(b)(2)(iv)(m)(2)
applies,  or to the Members to whom such distribution was made in the event that
Treasury Regulations Section 1.704-1(b)(2)(iv)(m)(4) applies.

                                                      -25-
<PAGE>

     7.13 Curative  Allocations.  The allocations set forth in Sections  7.1(b),
7.2, 7.3, 7.7, 7.8, 7.9,  7.10, and 7.11 hereof (the  "Regulatory  Allocations")
are intended to comply with certain requirements of the Treasury Regulations. It
is the intent of the  Members  that,  to the  extent  possible,  all  Regulatory
Allocations  shall be offset either with other  Regulatory  Allocations  or with
special  allocations of other items of Company  income,  gain, loss or deduction
pursuant to this Section 7.13. Therefore, notwithstanding any other provision of
this Article VII (other than the  Regulatory  Allocations),  the Managing  Board
shall make such offsetting special allocations of Company income,  gain, loss or
deduction in whatever  manner they  determine  appropriate  so that,  after such
offsetting  allocations are made,  each Member's  Capital Account balance is, to
the extent possible, equal to the Capital Account balance such Member would have
had if the Regulatory Allocations were not part of the Agreement and all Company
items were allocated  pursuant to Section  7.1(a).  In exercising its discretion
under this  Section  7.13,  the Managing  Board shall take into  account  future
Regulatory  Allocations under Sections 7.8 and 7.9 that,  although not yet made,
are likely to offset other Regulatory Allocations previously made under Sections
7.3 and 7.4.

     7.14 Compliance  with Treasury  Regulations.  The above  provisions of this
Article VII  notwithstanding,  it is  specifically  understood that the Managing
Board may without the consent of any Member make such elections, tax allocations
and adjustments,  including amendments to this Agreement,  as the Managing Board
deem necessary or appropriate  to maintain to the greatest  extent  possible the
validity of the tax allocations set forth in this Agreement,  particularly  with
regard to Treasury Regulations under Code Section 704(b).

     7.15 Tax Withholding.  The Company shall be authorized to pay, on behalf of
any Member, any amounts to any federal, state or local taxing authority,  as may
be necessary  for the Company to comply with tax  withholding  provisions of the
Code or other income tax or revenue laws of any taxing authority.  To the extent
the Company  pays any such amounts that it may be required to pay on behalf of a
Member,  such amounts shall be treated as a cash Distribution to such Member and
shall reduce the amount otherwise distributable to such Member.

                          ARTICLE VIII - DISTRIBUTIONS

     8.1  Company  Cash Flow.  Company  Cash Flow for each Fiscal  Year,  to the
extent available,  shall be distributed to the Members within 60 days of the end
of each Fiscal Year,  or earlier in the  discretion  of the Managing  Board,  in
accordance with the Members respective  Percentage  Interests at the time of the
distribution.

     8.2 Company  Refinancing  Proceeds.  Company Refinancing  Proceeds,  to the
extent  available,  shall be  distributed  to the Members  within 60 days of the
Capital  Transaction giving rise to such proceeds,  or earlier in the discretion
of the Managing  Board,  in accordance  with the Members  respective  Percentage
Interests at the time of the distribution.

     8.3 Company Sales Proceeds.  Company Sale Proceeds, to the extent available
shall be distributed  to the Members  within 60 days of the Capital  Transaction
giving rise to such proceeds, or
                                                      -26-
<PAGE>

     earlier,  in the discretion of the Managing  Board,  in accordance with the
Members respective Percentage Interests at the time of the distribution.

     8.4 Distributions in Liquidation.  Upon liquidation of the Company, all the
Company's  Property  shall be liquidated or  distributed  as provided in Section
11.3 and Profits and Losses allocated accordingly. Proceeds from the liquidation
of the Company shall be distributed in accordance with the provisions of Section
11.3.

     8.5 Limitation Upon  Distributions.  No Distribution  shall be declared and
paid if payment of such  Distribution  would  cause the  Company to violate  any
limitation  on  distributions  provided in the Act or provided in any  agreement
entered into by the Company for the express  purpose of obtaining  financing for
Company operations.

           ARTICLE IX - TRANSFER OF INTERESTS AND ADMISSION OF MEMBERS

     9.1 Transferability of Membership Interests.

     (a) The term  "transfer"  when used in this  Agreement  with  respect  to a
Membership Interest includes a sale, assignment,  gift, pledge, exchange, or any
other disposition (but does not include the issuance of new Membership Interests
pursuant to a Dilution Offering);

     (b) The  Membership  Interest of any Member  shall not be  transferred,  in
whole or in part,  except in accordance  with the conditions and limitations set
forth in Section 9.2 or Article X;

     (c) The transferee of a Membership Interest by assignment, operation of law
or otherwise,  shall have only the rights,  powers and privileges  enumerated in
Section 9.3 or otherwise  provided by law and may not be admitted to the Company
as a Member except as provided in Section 9.4;

     (d)  Notwithstanding  any provision herein to the contrary,  this Agreement
shall  in no way  restrict  the  issuance  or  transfers  of stock of Sun or its
Affiliates; and

     (e) Notwithstanding  any provision herein to the contrary,  the issuance of
Membership  Interests  pursuant to a Dilution  Offering and the admission of new
Members  pursuant to a Dilution  Offering shall be governed by the provisions of
Section 5.3 of this Agreement.

                                                      -27-
<PAGE>

     9.2 Restrictions on Transfers by Members.

     (a) All or part of a  Membership  Interest may be  transferred  by a Member
only with the prior written  approval of the Managing Board,  which approval may
be granted or denied in its sole discretion.

     (b) The  Managing  Board  shall not approve  any  transfer of a  Membership
Interest,  except a pledge of any  Membership  Interest by the Managing Board to
any bank, insurance company or other financial  institution to secure payment of
indebtedness (a "Permitted Pledge"), or otherwise unless the proposed transferee
shall have furnished the Managing Board with a sworn statement that:

     (i) The  proposed  transferee  proposes  to acquire  his or her  Membership
Interest  as a  principal,  for  investment  and not  with a view to  resale  or
distribution;

     (ii)  The   proposed   transferee   meets   such   requirements   regarding
sophistication, income and net worth as required by applicable state and federal
securities laws;

     (iii) The proposed transferee has met such net worth and income suitability
standards as have been established by the Managing Board;

     (iv) The proposed  transferee  recognizes  that  investment  in the Company
involves  certain risks and has taken full  cognizance of and understands all of
the risk factors related to the purchase of a Membership Interest; and

     (v) The proposed  transferee has met all other requirements of the Managing
Board for the proposed transfer.

     (c)  Other  than  in the  case  of a  Permitted  Pledge,  a  transfer  of a
Membership Interest may be made only if, prior to the date thereof,  the Company
upon request receives an opinion of counsel,  satisfactory in form and substance
to the Managing Board,  that neither the offering nor the proposed transfer will
require  registration  under  federal or  applicable  state  securities  laws or
regulations.

     9.3 Rights of  Transferee.  Unless  admitted  to the Company as a Member in
accordance  with Section 9.4, the transferee of a Membership  Interest or a part
thereof or any right, title or interest therein (including any transferee having
an interest in a Membership  Interest as a result of a Permitted  Pledge)  shall
not be  entitled  to any of the  rights,  powers,  or  privileges  of his or her
predecessor  in interest,  except that (s)he shall be entitled to receive and be
credited  or debited  with his or her  proportionate  share of Company  Profits,
Losses,  Gains from  Capital  Transactions,  Company  Cash Flow,  Company  Sales
Proceeds, Company Refinancing Proceeds and Distributions in liquidation.
                                                      -28-
<PAGE>

     9.4 Admission of Members.  Except as otherwise  provided in Section 5.3 and
Article X, the transferee of all or part of the Membership Interest of a Member,
may be admitted to the Company as a Member upon furnishing to the Managing Board
all of the following:

     (a) The written  approval of a Majority in Interest of the Members  (except
the  assignor  Member),  or the assignor  Member  alone,  which  approval may be
granted or denied in the sole  discretion of such Members or Member (as the case
may be);

     (b) The written  approval of the  Managing  Board,  which  approval  may be
granted or denied in the sole discretion of the Managing Board;

     (c)  Acceptance,  in a form  satisfactory to the Managing Board, of all the
terms and  conditions  of this  Agreement  and any other  documents  required in
connection  with the  operation  of the  Company  pursuant  to the terms of this
Agreement;

     (d) If the transferee is a corporation, a certified copy of a resolution of
its Board of  Directors  authorizing  it to become a Member  under the terms and
conditions of this Agreement;

     (e) A properly executed power of attorney  substantially  identical to that
contained in Section 12.15;

     (f) Such other  documents  or  instruments  as may be  required in order to
effect his or her admission as a Member; and

     (g) Payment of such  reasonable  expenses as may be incurred in  connection
with his or her admission as a Member.

     9.5 Amendment of Certificate of Formation and  Qualification.  The Managing
Board shall take all steps  necessary and  appropriate to prepare and record any
amendments to the  Certificate of Formation,  as may be necessary or appropriate
from time to time to comply with the requirements of the Act, and shall take all
steps  necessary  and  appropriate  to prepare and record any and all  documents
necessary  to qualify  the Company to do  business  in  jurisdictions  where the
Company is doing  business,  and may for these  purposes  exercise  the power of
attorney delivered to the Company pursuant to Sections 9.4 and 12.15.

     9.6 Fundamental  Changes.  As provided in Section  3.3(e),  if the Managing
Board and the Members representing  two-thirds of the aggregate interests in the
Company approve a plan providing for the merger or  consolidation of the Company
with another person or entity,  or the sale of all or  substantially  all of the
Membership  Interests,  including without  limitation the exchange of Membership
Interests for equity  interests in another person or entity or for cash or other
consideration or combination thereof,  then and in such event, the Members shall
be obligated to take or refrain from taking, as the case may be, such actions as
the  plan  may  provide,   including,   without   limitations,   executing  such
instruments,  and  providing  such  information  as  the  Managing  Board  shall
reasonably  request.  Any plan  described in this Section 9.6 may also effect an
amendment to the Certificate of Formation or Operating

                                                      -29-
<PAGE>

     Agreement,  or the adoption of a new operating agreement in connection with
the merger of the Company with  another  person or entity as provided in Section
25.15.410 of the Act. The plan may also provide that the Managing  Board members
shall receive fees for services rendered in connection with the operation of the
Company or any successor  entity  following the consummation of the transactions
described  in the plan,  and neither the Company nor the Members  shall have any
right  by  virtue  of  this  Agreement  in the  income  derived  therefrom.  Any
securities or other  consideration  to be distributed to the Members pursuant to
the plan shall be  distributed in the manner set forth in Section 11.3 as though
the Company were being liquidated.  For this purpose only, the fair market value
of the  securities or other  consideration  to be received  pursuant to the plan
shall be treated as "Profits"  and the capital  accounts of the Members shall be
increased in the manner  provided in Section 5.5. No Member shall be entitled to
any appraisal or similar rights in connection  with a plan  contemplated by this
Section 9.6.

              ARTICLE X - OPTIONAL PURCHASE OF MEMBERSHIP INTERESTS
                                ON CERTAIN EVENTS

     10.1 Death.  Upon the death of a Member,  the deceased  Member's  executor,
administrator,  or other legal or  personal  representative  shall give  written
notice of that fact to the Managing Board.  The Company shall have the option to
purchase  at the  Closing  (as  defined  below) the  Membership  Interest of the
deceased  Member  (whose  executor,  administrator  or other  legal or  personal
representative  shall then become obligated to sell such Membership Interest) at
the price  determined in the manner  provided in Section 10.7 of this  Agreement
and on the terms and conditions provided in Section 10.8 of this Agreement.  The
Company  shall  have a period of thirty  (30) days  following  the date it first
received  notice of the death of the Member (the "First Option  Period")  within
which to notify in writing the  deceased  Member's  executor,  administrator  or
other legal or personal representative,  whether the Company desires to purchase
all or a portion of the  Membership  Interest  of the  deceased  Member.  If the
Company  does not  elect to  purchase  the  entire  Membership  Interest  of the
deceased  Member  before the  expiration  of the First Option  Period and in the
manner provided herein, the Members shall have the option to purchase all or any
part of the  Membership  Interest of the  deceased  Member not  purchased by the
Company at the price  determined in the manner  provided in Section 10.7 of this
Agreement  and on the terms and  conditions  provided  in  Section  10.8 of this
Agreement.  Any Member  desiring  to purchase  any part or all of the  remaining
Membership Interest of the deceased Member shall deliver to the Managing Board a
written  election to  purchase  all or a  specified  portion of such  Membership
Interest within the ten (10) day period  immediately  following the close of the
First  Option  Period  (the  "Second  Option  Period").  If the  Members  in the
aggregate  elect to purchase more than the Membership  Interest then  available,
each electing Member shall have a priority,  up to that portion specified in his
or her  notice of  election,  to  purchase  such  proportion  of the  Membership
Interest of the deceased Member then available as his or her Percentage Interest
bears to the aggregate Percentage Interests of the Members electing to purchase.
That portion of the deceased Member's  Membership Interest not purchased on such
a priority  basis shall be allocated in one or more  successive  allocations  to
those  remaining  Members  electing to purchase more of the Membership  Interest
than they have a priority right, up to the portion specified in their respective
elections,  in the proportion that each of their  Percentage  Interests bears to
the aggregate Percentage Interest of all of them.

                                                      -30-

<PAGE>

     Within  the ten (10) day  period  immediately  following  the  close of the
Second  Option  Period (the  "Confirmation  Period"),  the Managing  Board shall
inform each  electing  Member of the portion of the  Membership  Interest of the
deceased Member as to which his or her election is effective. The Managing Board
shall  give  notice  to the  deceased  Member  within  the ten (10)  day  period
following the close of the Confirmation  Period (the  "Notification  Period") of
the election by the Members to exercise their option. Such notice shall indicate
the portion of the deceased Member's  Membership Interest that will be purchased
by each of the  purchasing  Members and the Company,  if any. Any portion of the
Membership  Interest not  purchased by the Company and Members  shall be held by
the deceased  Member's  executor,  administrator  or other legal  representative
pursuant to the terms of this Agreement.

     10.2  Bankruptcy,  Insolvency or  Assignment  for Benefit of Creditors of a
Member.  In the event that an  involuntary  or  voluntary  proceeding  under the
Federal  Bankruptcy Code, as amended,  is filed for or against any Member, or if
any Member shall make an assignment for the benefit of his or her creditors,  or
if any Member has a receiver or custodian  appointed  for his or her assets,  or
any  Member  generally  fails to pay his or her debts  when due,  the  insolvent
Member shall give written  notice (the "Notice of  Insolvency")  to the Managing
Board of the commencement of any such proceeding or the occurrence of such event
within  five days of the  first  notice  to him or her of such  commencement  or
occurrence  of such event.  The Company shall have the option to purchase at the
Closing (as defined  below) the  Membership  Interest  of the  insolvent  Member
(which insolvent Member or his trustee, custodian, receiver or other personal or
legal  representative,  as the case may be, shall then become  obligated to sell
such  Membership  Interest) at the price  determined  in the manner  provided in
Section  10.7 of this  Agreement  and on the terms and  conditions  provided  in
Section 10.8 of this  Agreement.  The Company shall have a period of thirty (30)
days  following the date of either the Notice of  Insolvency,  or if such formal
notice is not given,  the date the  Managing  Board first  becomes  aware of the
financial  condition  of the Member as outlined in this Article 10.2 (the "First
Option  Period"),  within which to notify in writing the insolvent Member or his
trustee, custodian, receiver, or other legal or personal representative, whether
the Company  wishes to purchase all or a portion of the  Membership  Interest of
the  insolvent  Member.  If the Company  does not elect to  purchase  the entire
Membership  Interest of the insolvent  Member before the expiration of the First
Option  Period and in the manner  provided  herein,  the Members  shall have the
option to purchase all or any part of the  Membership  Interest of the insolvent
Member  not  purchased  by the  Company  at the price  determined  in the manner
provided  in  Section  10.7 of this  Agreement  and on the terms and  conditions
provided in Section 10.8 of this Agreement.  Any Member desiring to purchase any
part or all of the remaining  Membership  Interest of the insolvent Member shall
deliver to the Managing Board a written  election to purchase all or a specified
portion of such Membership  Interest within the ten (10) day period  immediately
following the close of the First Option Period (the "Second Option Period").  If
the Members in the aggregate elect to purchase more than the Membership Interest
then available,  each electing Member shall have a priority,  up to that portion
specified in his or her notice of election,  to purchase such  proportion of the
Membership  Interest  of  the  insolvent  Member  then  available  as his or her
Percentage Interest bears to the aggregate  Percentage  Interests of the Members
electing to purchase. That portion of the insolvent Member's Membership Interest
not  purchased  on such a  priority  basis  shall  be  allocated  in one or more
successive  allocations to those remaining  Members electing to purchase more of
the  Membership  Interest  than they have a priority  right,  up to the  portion
specified in their  respective  elections,  in the proportion that each of their
Percentage Interests bears to the aggregate Percentage Interest of all of them.

                                                      -31-
<PAGE>

     Within  the ten (10) day  period  immediately  following  the  close of the
Second  Option  Period (the  "Confirmation  Period"),  the Managing  Board shall
inform each  electing  Member of the portion of the  Membership  Interest of the
insolvent  Member as to which his or her  election is  effective.  The  Managing
Board shall give notice to the  insolvent  Member within the ten (10) day period
following the close of the Confirmation  Period (the  "Notification  Period") of
the election by the Members to exercise their option. Such notice shall indicate
the portion of the insolvent Member's Membership Interest that will be purchased
by each of the  purchasing  Members and the Company,  if any. Any portion of the
Membership  Interest not  purchased by the Company and Members  shall be held by
the insolvent Member, his or her trustee, custodian,  receiver or other legal or
personal representative pursuant to the terms of this Agreement.

     10.3 Default under Guaranties.  Notwithstanding any other provision of this
Article X to the  contrary,  if any of the events  outlined in Sections  10.1 or
10.2 or any other  defaulting  event  outlined in the Guaranty (the  "Defaulting
Events") should occur with respect to a Member (the  "Defaulting  Member"),  and
the  Managing  Board  determines  (in its sole  discretion)  that such event may
result in default and  acceleration  of an  obligation  secured by the  Guaranty
unless another guarantor  acceptable to the Bank can be substituted in the place
of the  Defaulting  Member,  then the  Managing  Board  shall  have the right to
immediately  take the steps as outlined  in this  Section  10.3 to prevent  such
default.  Upon the Managing  Board  receiving  notice of a  Defaulting  Event as
provided above,  the Managing Board, in its sole discretion,  shall  immediately
have  the  right  to  either  (i) sell the  entire  Membership  Interest  of the
Defaulting  Member  to an  investor  approved  of by the  Managing  Board,  (ii)
purchase  for the  Company's  account  the  entire  Membership  Interest  of the
Defaulting  Member,  or  (iii)  sell  the  entire  Membership  Interest  of  the
Defaulting  Member to one or more of the other Members.  The  Defaulting  Member
shall sell his or her Membership Interest to the purchaser at the purchase price
determined  in the  manner  as  provided  in  Section  10.7 and on the terms and
conditions as provided in Section 10.8. The transfer of the Membership Interest,
the payment of the purchase price, and the assumption of the Defaulting Member's
obligations  under his or her Guaranty (as provided in Section  10.7),  shall be
made at such  time as  determined  by the  Managing  Board in order to avoid the
default and acceleration of the obligation secured by the Guaranty.  Each Member
hereby  makes,  constitutes  and  appoints  the  Chairman,  with  full  power of
substitution, his or her true and lawful attorney-in-fact,  to take such actions
and execute such documents on his or her behalf to effect the transfer of his or
her  Membership  Interest as provided in this  Section  10.3,  in the event such
Member becomes a Defaulting Member.

     10.4 Breach of Section 4.6. In the event the Managing Board either receives
a Notice of Withdrawal as provided in Section 4.6 or receives notice of a breach
of Section 4.6 by a Member (the  "Competing  Member"),  the  Managing  Board may
elect,  in its sole  discretion,  to treat  such  event as a default  under this
Agreement  and enforce the  provisions  of this Section  10.4. In the event of a
deadlock of the Managing Board, the Managing Board's determination of whether to
treat a  Member's  Notice of  Withdrawal  under  Section 4.6  or the notice of a
Member's  breach of  Section  4.6 as a default  under  this  Agreement  shall be
submitted to binding arbitration in accordance with Section 12.16 hereof. If the
Managing  Board  (pursuant  to its own vote or the  decision  of an  arbitrator)
elects to enforce the  provisions of this Section 10.4, the Managing Board shall
give written  notice of such election (the "Notice of Default") to the Competing
Member within 180 days of the date the Managing Board first  received  notice of
the defaulting event. Upon giving the Notice of Default,  the Company shall have
the option to purchase at the Closing (as defined below) the Membership Interest
of the Competing Member
                                                      -32-
<PAGE>

     (which Competing Member shall then become obligated to sell such Membership
Interest) at the price determined in the manner provided in Section 10.7 of this
Agreement  and on the terms and  conditions  provided  in  Section  10.8 of this
Agreement.  The Company  shall have a period of thirty (30) days  following  the
date of the Notice of Default (the "First Option Period") within which to notify
in writing the Competing Member, whether the Company wishes to purchase all or a
portion of the Membership  Interest of the Competing Member. If the Company does
not elect to purchase the entire  Membership  Interest of the  Competing  Member
before the  expiration  of the First  Option  Period and in the manner  provided
herein,  the Members  shall have the option to  purchase  all or any part of the
Membership  Interest of the Competing Member not purchased by the Company at the
price determined in the manner provided in Section 10.7 of this Agreement and on
the terms and conditions provided in Section 10.8 of this Agreement.  Any Member
desiring to purchase any part or all of the remaining Membership Interest of the
Competing  Member  shall  deliver to the  Managing  Board a written  election to
purchase all or a specified  portion of such Membership  Interest within the ten
(10) day period immediately  following the close of the First Option Period (the
"Second Option Period").  If the Members in the aggregate elect to purchase more
than the Membership  Interest then available,  each electing Member shall have a
priority,  up to that portion  specified  in his or her notice of  election,  to
purchase such proportion of the Membership Interest of the Competing Member then
available as his or her Percentage  Interest  bears to the aggregate  Percentage
Interests  of the Members  electing to purchase.  That portion of the  Competing
Member's  Membership  Interest not  purchased on such a priority  basis shall be
allocated  in one or more  successive  allocations  to those  remaining  Members
electing to purchase more of the  Membership  Interest than they have a priority
right,  up to the  portion  specified  in  their  respective  elections,  in the
proportion  that  each of their  Percentage  Interests  bears  to the  aggregate
Percentage Interest of all of them.

     Within  the ten (10) day  period  immediately  following  the  close of the
Second  Option  Period (the  "Confirmation  Period"),  the Managing  Board shall
inform each  electing  Member of the portion of the  Membership  Interest of the
Competing  Member as to which his or her  election is  effective.  The  Managing
Board shall give notice to the  Competing  Member within the ten (10) day period
following the close of the Confirmation  Period (the  "Notification  Period") of
the election by the Members to exercise their option. Such notice shall indicate
the portion of the Competing Member's Membership Interest that will be purchased
by each of the  purchasing  Members and the Company,  if any. Any portion of the
Membership  Interest not  purchased by the Company and Members  shall be held by
the Competing Member pursuant to the terms of this Agreement.

     10.5 Domestic Proceeding.  In the event that a spouse of a Member commences
against a Member,  or a Member is named in, a  Domestic  Proceeding,  the Member
shall give written notice (the "Notice of Domestic  Proceeding") to the Managing
Board of the  commencement of any such proceeding  within five days of the first
notice to him or her of such commencement.  The Company shall have the option to
purchase at the Closing (as defined below) the Membership Interest of the Member
involved in the Domestic Proceeding (which Member shall then become obligated to
sell such Membership  Interest),  at the price determined in the manner provided
in Section 10.7 of this  Agreement and on the terms and  conditions  provided in
Section 10.8 of this  Agreement.  The Company shall have a period of thirty (30)
days following the date of either the Notice of Domestic Proceeding,  or if such
formal notice is not given,  the date the Managing  Board first becomes aware of
the domestic  circumstances  of the Member as provided in this Section 10.5 (the
"First Option Period"), within which to notify in

                                                      -33-
<PAGE>

     writing the Member involved in the Domestic Proceeding, whether the Company
wishes to purchase all or a portion of the  Membership  Interest of such Member.
If the Company does not elect to purchase the Membership  Interest of the Member
involved in the Domestic  Proceeding  before the  expiration of the First Option
Period and in the manner provided  herein,  the Members shall have the option to
purchase all or any part of the  Membership  Interest of the Member  involved in
the Domestic  Proceeding not purchased by the Company at the price determined in
the manner  provided  in  Section  10.7 of this  Agreement  and on the terms and
conditions  provided in Section 10.8 of this  Agreement.  Any Member desiring to
purchase  any part or all of the  remaining  Membership  Interest  of the Member
involved  in the  Domestic  Proceeding  shall  deliver to the  Managing  Board a
written  election to  purchase  all or a  specified  portion of such  Membership
Interest within the ten (10) day period  immediately  following the close of the
First  Option  Period  (the  "Second  Option  Period").  If the  Members  in the
aggregate  elect to purchase more than the Membership  Interest then  available,
each electing Member shall have a priority,  up to that portion specified in his
or her  notice of  election,  to  purchase  such  proportion  of the  Membership
Interest of the Member involved in the Domestic Proceeding then available as his
or her Percentage  Interest bears to the aggregate  Percentage  Interests of the
Members electing to purchase.  That portion of the Member's  Membership Interest
not  purchased  on such a  priority  basis  shall  be  allocated  in one or more
successive  allocations to those remaining  Members electing to purchase more of
the  Membership  Interest  than they have a priority  right,  up to the  portion
specified in their  respective  elections,  in the proportion that each of their
Percentage Interests bears to the aggregate Percentage Interest of all of them.

     Within  the ten (10) day  period  immediately  following  the  close of the
Second  Option  Period (the  "Confirmation  Period"),  the Managing  Board shall
inform each  electing  Member of the portion of the  Membership  Interest of the
Member  involved in the Domestic  Proceeding  as to which his or her election is
effective.  The Managing  Board shall give notice to the Member  involved in the
Domestic  Proceeding  within the ten (10) day period  following the close of the
Confirmation  Period (the "Notification  Period") of the election by the Members
to exercise their option. Such notice shall indicate the portion of the Member's
Membership Interest that will be purchased by each of the purchasing Members and
the Company, if any. Any portion of the Membership Interest not purchased by the
Company  and  Members  shall be held by such  Member  involved  in the  Domestic
Proceeding pursuant to the terms of this Agreement.

     10.6  Divestiture  Option.  If state  or  federal  regulations  or laws are
enacted or applied,  or if any other legal  developments  occur,  which,  in the
opinion of the Managing Board adversely affect (or potentially adversely affect)
the operation of the Company (e.g.,  the enactment or application of prohibitory
physician  self-referral  legislation  against the Company or its Members),  the
Managing  Board  shall  promptly  notify  the  Members of the  applicable  legal
development and in good faith  diligently work with the Members to devise a plan
pursuant to which the  Company  may avoid such  adverse  effect,  including  the
modification  of this  Agreement and any other  contracts or agreements  entered
into by the Company.  In the event the Managing  Board and Members are unable to
devise such a plan within a  reasonable  time period,  the Managing  Board shall
elect, in its discretion,  to either (i) take the steps outlined in this Section
10.6 to divest the Members of their Membership  Interests,  or (ii) dissolve the
Company as provided in Article XI. If the Managing  Board chooses option (i), it
shall  deliver a written  notice of such  decision to all of the Members and Sun
shall purchase such Membership Interests for its own account. The purchase price
to be paid for each Membership Interest shall be determined in the

                                                      -34-
<PAGE>

     manner as provided in Section 10.7 and shall be on the terms and conditions
as provided in Section  10.8.  The  transfer of the  Membership  Interests,  the
payment of the purchase  price and the  assumption  of the Members'  obligations
under their respective Guaranties (as provided in Section 10.7) shall be made at
such time as determined by the Managing Board to be in the best interests of the
Company  and  its  Members.  In the  event  of the  transfer  of the  Membership
Interests of all the Members to Sun  pursuant to option (i) above,  the transfer
of  the  Membership  Interests,  the  payment  of the  purchase  price  and  the
assumption of the Members'  obligations  under their  respective  Guaranties (as
provided in Section 10.7) shall be made either as of the  effective  date of the
applicable legal development giving rise to the divestiture,  or at such earlier
date as  determined  by the  Managing  Board to be in the best  interests of the
Company and its Members. Each Member hereby makes,  constitutes and appoints the
Chairman,  with full  power of  substitution,  his,  her or its true and  lawful
attorney-in-fact, to take such actions and execute such documents on his, her or
its behalf to effect the  transfer  of his,  her or its  Membership  Interest as
provided in this Section  10.6.  The  foregoing  power of attorney  shall not be
affected by the  subsequent  incapacity,  mental  incompetence,  dissolution  or
bankruptcy of any Member.

     10.7  Purchase  Price.  The  purchase  price to be paid for the  Membership
Interest  of any  Member  whose  interest  is being  purchased  pursuant  to the
provisions of Sections 10.1, 10.2,  10.3,  10.4, 10.5 or 10.6 (the  "Withdrawing
Member")  shall be determined in the manner  provided in this Section 10.7.  The
purchase price for a Membership Interest purchased pursuant to the provisions of
Sections 10.2, 10.3 or 10.4 shall be an amount equal to the Withdrawing Member's
share of the Company's  book value,  if any,  (prorated in the event that only a
portion of his or her  Membership  Interest is being  purchased) as reflected by
the Capital Account of the Withdrawing  Member  (unadjusted for any appreciation
in  Company  assets and as reduced  by  depreciation  deductions  claimed by the
Company for tax  purposes)  as of the  Valuation  Date (as defined  below).  The
determination of the Withdrawing  Member's Capital Account on the Valuation Date
(as defined  below)  shall be made by the  Company's  internal  accountant  (the
"Company  Accountant")  upon a review of the Company's  books of account,  and a
formal audit is expressly waived.  The statement of the Company  Accountant with
respect to the Capital Account of the  Withdrawing  Member on the Valuation Date
shall  be  binding  and  conclusive  upon the  Company,  the  purchaser  and the
Withdrawing Member and his, her or its representative. In the case of a purchase
of a Membership  Interest  pursuant to the provisions of Sections 10.1,  10.5 or
10.6, the purchase price shall be an amount equal to two (2) times the aggregate
distributions made with respect to such Membership  Interest pursuant to Section
8.1 during the  twelve-month  period ending on the Valuation Date (the "Purchase
Price  Formula").  The Purchase  Price Formula shall be subject to revision from
time to time as set forth in Section  3.3(g).  The  Valuation  Date shall be the
last day of the month immediately  preceding the month in which occurs:  (i) the
death of a Member,  in the case of a  purchase  by  reason  of  death;  (ii) the
bankruptcy  or  insolvency  of a Member,  in the case of a purchase by reason of
such bankruptcy or insolvency;  (iii) the notice of Defaulting Event as provided
in Section  10.3,  in the case of a purchase  occurring by reason of one of such
events;  (iv) the Notice of  Withdrawal  or breach of Section 4.6 as provided in
Section 10.4 in the case of a purchase by reason thereof;  (v) the  commencement
of the Domestic Proceeding, in the case of a purchase by reason thereof; or (iv)
the Notice of Election as provided in Section 10.6, in the case of a purchase by
reason thereof.  Any Member whose Membership  Interest is purchased  pursuant to
the  provisions  of  Sections  10.1,  10.2,  10.3,  10.4,  10.5 or 10.6 shall be
entitled  only to the purchase  price which shall be paid at the Closing in cash
(or by certified  or  cashier's  check) and shall not be entitled to any Company
distributions  made after the  Valuation  Date. If as of the date of the Closing
the Withdrawing Member still has an outstanding
                                                      -35-
<PAGE>

     personal obligation under the Guaranty (the  "Obligation"),  the purchasing
Member (or  Members,  as the case may be, in  proportion  to their  share of the
purchased  Membership  Interest)  shall  assume the  Obligation,  indemnify  the
Withdrawing Member from the Obligation,  and take such steps deemed necessary by
the  Managing  Board to formally  evidence  the  assumption  of the  Obligation,
including  without  limitation,  executing  such  documents and  providing  such
financial  information  to the  Bank  (as  the  case  may  be) to  evidence  the
assumption  of the  Obligation,  and  obtain,  if  possible,  the release of the
Withdrawing Member from the Obligation. The transfer of a Membership Interest of
a Withdrawing  Member shall be deemed to occur as of the Valuation  Date and the
Withdrawing  Member  shall have no voting or other rights as a Member after such
date. The purchaser shall be entitled to any  distributions  attributable to the
transferred  interest  after the  Valuation  Date and the Company shall have the
right to deduct the  amount of any such  distributions  made to the  Withdrawing
Member after the Valuation Date from the purchase price.

     10.8 Closing of Purchase and Sale.  The Closing of any purchase and sale of
a Membership  Interest pursuant to Sections 10.1, 10.2, 10.3, 10.4, 10.5 or 10.6
of this Agreement  shall take place at the principal  office of the Company,  or
such other place  designated by the Managing  Board,  on the date  determined as
follows (the "Closing"):

     (a) In the case of a purchase and sale  occurring by reason of the death of
a Member as provided in Section  10.1 of this  Agreement,  the Closing  shall be
held on the thirtieth  day (or if such  thirtieth day is not a business day, the
next business day following the thirtieth day) immediately following the last to
occur of:

     (i) Qualification of the executor or personal administrator of the deceased
Member's estate;

     (ii) The date on which any necessary determination of the purchase price of
the Membership Interest to be purchased has been made; or

     (iii) The date that coincides with the close of the First Option Period, if
the option  exercised  by the Company is with  respect to the entire  Membership
Interest of the deceased  Member,  or the date that  coincides with the close of
the Notification  Period, if the option exercised by the Company is with respect
to less  than all of the  Membership  Interest  of the  deceased  Member  or the
Company does not exercise its option.

     (b) In  the  case  of a  purchase  and  sale  occurring  by  reason  of the
occurrence of one of the events  described in Sections 10.2, 10.3, 10.4, 10.5 or
10.6 of this  Agreement,  the Closing  shall be held on the thirtieth day (or if
such  thirtieth  day is not a business  day, the next business day following the
thirtieth day) immediately following the later to occur of:

                                                      -36-
<PAGE>

     (i) The date on which any necessary  determination of the purchase price of
the Membership Interest to be purchased has been made; or

     (ii) The date that coincides with the close of the First Option Period,  if
the option  exercised  by the Company is with  respect to the entire  Membership
Interest of the Member  whose  interest is being  transferred,  or the date that
coincides with the close of the Notification  Period, if the option exercised by
the  Company is with  respect to less than all the  Membership  Interest of such
Member or the Company does not exercise its option.

     At the  Closing,  although  not  necessary  to  effect  the  transfer,  the
Withdrawing  Member shall concurrently with tender and receipt of the applicable
purchase price,  deliver to the purchaser duly executed  instruments of transfer
and assignment,  assigning good and marketable  title to the portion or portions
of the Withdrawing Member's entire Membership Interest thus purchased,  free and
clear from any liens or encumbrances  or rights of others  therein.  The parties
acknowledge  that  occurrence  of any  of the  triggering  events  described  in
Sections  10.1,  10.2,  10.3,  10.4,  10.5 or 10.6 and  compliance  with all the
Articles of this  Agreement,  except the execution of the transfer  documents by
the Withdrawing Member as provided above in this Section 10.8, are sufficient to
effect the  complete  transfer  of the  Withdrawing  Member's  interest  and the
Withdrawing  Member shall be deemed to consent to admission of the transferee as
a  substitute  Member.  Notwithstanding  the date of the  Closing  or  whether a
Closing is  successfully  held,  the  transfer  of a  Membership  Interest  of a
Withdrawing  Member shall be deemed to occur as of the Valuation Date as defined
in Section  10.7.  The deemed  transfer is effective  regardless  of whether the
Withdrawing Member performs the duties set forth in this Section 10.8.

     10.9 Terms and Conditions of Purchase.  The Membership Interest of a Member
shall not be transferred to any Member unless the  requirements  of Sections 9.2
and 9.4 (b) through (g) are satisfied with respect to it. The purchaser shall be
liable for all obligations  and  liabilities  connected with that portion of the
Membership Interest transferred to it unless otherwise agreed in writing.

             ARTICLE XI - DISSOLUTION AND LIQUIDATION OF THE COMPANY

     11.1 Dissolution  Events.  The Company will be dissolved upon the happening
of any of the following events:

     (a) The expiration of its term on December 31, 2020;

     (b) The  determination  of the Managing Board and the Members  representing
two-thirds of the aggregate  interests of the Company that the Company should be
dissolved;
                                                      -37-
<PAGE>

     (c)  Pursuant to Section  3.3(e),  the  approval of a plan by the  Managing
Board  and the  Members  providing  for  the  merger,  consolidation  or sale of
Membership Interests as described in Section 9.6;

     (d) The  election of the Managing  Board to dissolve the Company  following
the occurrence of an event described in Section 10.6;

     (e) The sale,  exchange or other disposition of all or substantially all of
the  Property  of the  Company  without  making  provision  for the  replacement
thereof;

     (f) The  Bankruptcy  or  dissolution  of a Member or the  occurrence of any
other event which  terminates  the continued  membership  of any Member,  unless
there is at least one  remaining  Member  and the  business  of the  Company  is
continued  by the written  consent of a Majority  in  Interest of the  remaining
Members within ninety (90) days of the occurrence of such event; or

     (g) Any other event  resulting in the  dissolution  or  termination  of the
Company under the laws of the State of Washington.

     11.2  Continuation.  Upon the occurrence of any of the events  described in
Section  11.1(f)  above with respect to any of the Members,  the business of the
Company  will be  continued if within  ninety (90)  calendar  days a Majority in
Interest of the remaining Members elect to continue the business of the Company.
If the  Members  fail to  continue  the  Company's  business as provided in this
Section 11.2, the Company will be liquidated under Section 11.3.

     11.3  Liquidation.  Upon the  happening  of any of the events  specified in
Section  11.1 and, if  applicable,  the failure to continue  the business of the
Company under Section  11.2,  the Managing  Board,  or any  liquidating  trustee
elected by a Majority in Interest of the Members,  will  commence as promptly as
practicable  to wind up the Company's  affairs  unless the Managing Board or the
liquidating  trustee  (either,  the  "Liquidator")  determines that an immediate
liquidation  of Company  assets would cause undue loss to the Company,  in which
event the liquidation may be deferred for a time determined by the Liquidator to
be appropriate.  Assets of the Company may be liquidated or distributed in kind,
as the  Liquidator  determines to be  appropriate.  The Members will continue to
share Company Cash Flow,  Profits and Losses during the period of liquidation in
the manner set forth in Articles VII and VIII. The proceeds from  liquidation of
the Company, including repayment of any debts of Members to the Company, and any
Company  assets that are not sold in  connection  with the  liquidation  will be
applied in the following order of priority:

     (a) To payment of the debts and  satisfaction  of the other  obligations of
the Company, including without limitation debts and obligations to Members;

     (b)  To  the  establishment  of  any  reserves  deemed  appropriate  by the
Liquidator for any  liabilities  or  obligations of the Company,  which reserves
will be held for the purpose of paying  liabilities or  obligations  and, at the
expiration of a period the Liquidator deems appropriate,  will be distributed in
the manner provided in Section 11.3(c); and
                                                      -38-
<PAGE>

     (c) To the  payment  to the  Members  of the  positive  balances  in  their
respective Capital Accounts, pro rata, in proportion to the positive balances in
those capital accounts after giving effect to all allocations  under Article VII
and all  distributions  under Article VIII for all prior periods,  including the
period during which the process of liquidation occurs.

     11.4  Certificate of  Cancellation.  Upon the dissolution and completion of
the winding up of the Company,  the Managing  Board shall cause a Certificate of
Cancellation  to be  executed  on  behalf  of the  Company  and  filed  with the
Secretary of State,  and the Managing Board shall execute,  acknowledge and file
any  and  all  other  instruments   necessary  or  appropriate  to  reflect  the
dissolution and winding up of the Company.


                           ARTICLE XII - MISCELLANEOUS

     12.1 Fiscal Year.  The Fiscal Year will end on December 31, unless  another
fiscal year-end is selected by the Managing Board.

     12.2  Records.  Proper and complete  records and books of account  shall be
kept by the Managing  Board in which shall be entered fully and  accurately  all
transactions  and such other matters  relating to the Company's  business as are
usually entered into records and books of account  maintained by persons engaged
in business of like character.  The records of the Company will be maintained at
the  principal  place of business of the Company,  or at any other  location the
Managing Board selects  provided that the Company keep at its principal place of
business the records  required by the Act to be  maintained  there.  Appropriate
records  in  reasonable   detail  will  be  maintained  to  reflect  income  tax
information  for the  Members.  Each  Member may  inspect and make copies of the
records  maintained by the Company  during  reasonable  business  hours and upon
reasonable  notice.  Each Member, at his or her expense,  may make copies of the
records  maintained  by the  Company  and may  require  an audit of the books of
account maintained by the Company to be conducted by the independent accountants
for the Company.

     12.3 Reports. The Managing Board, at the expense of the Company, will cause
to be  prepared in  accordance  with the method of  accounting  then used by the
Company and  distributed to each Member within ninety (90) days after the end of
each  Fiscal  Year,  a balance  sheet as of the close of the Fiscal Year and the
annual  income tax returns and related  schedules  of the Company for the Fiscal
Year.

     12.4  Reserves.  The  Managing  Board  may  cause  the  Company  to  create
reasonable  reserve  accounts to be used exclusively for repairs and acquisition
of Additional Assets and for any other valid Company purpose. The Managing Board
shall in its sole  discretion  determine  the amount of payments to such reserve
accounts.

     12.5 Notices.  The Managing  Board will notify the Members of any change in
the name, principal or registered office or registered agent of the Company. Any
notice or other  communication  required by this  Agreement  must be in writing.
Notices  and  other  communications  will be  deemed  to have  been  given  when
delivered by hand or dispatched by telegraph, telex or other means of electronic
facsimile  transmission,  or three  business  days after being  deposited in the
United States mail, postage

<PAGE>

                                                      -39-
     prepaid, addressed to the Member to whom the notice is intended to be given
at his or her address set forth on Schedule I of this  Agreement or, in the case
of the Company,  to its principal place of business provided for in Section 1.4.
A Person  may  change  his or her  notice  address  by notice in  writing to the
Company and to each other Member given under this Section 12.5.

     12.6 Amendments. As expressly provided in this Agreement in Section 3.3(h),
no amendment of this  Agreement  will be valid or binding upon the Members,  nor
will any waiver of any term of this  Agreement be  effective,  unless in writing
and signed by the Managing Board and the Members representing  two-thirds of the
aggregate interests in the Company.

     12.7 Additional Documents. Each party agrees to execute and acknowledge all
documents and writings  which the Managing Board may deem necessary or expedient
in the creation of this Company and the achievement of its purpose, specifically
including but not limited to, a certificate of formation and all amendments,  as
well as any cancellation thereof.

     12.8 Representations of Members. Each Member represents and warrants to the
Company and every other  Member that (s)he (a) is fully aware of, and is capable
of bearing,  the risks relating to an investment in the Company, (b) understands
that his or her  interest  in the  Company  has not been  registered  under  the
Securities Act of 1933, as amended, or the securities law of any jurisdiction in
reliance upon  exemptions  contained in those laws,  and (c) has acquired his or
her  interest in the Company for his or her own account,  with the  intention of
holding the interest for investment  and without any intention of  participating
directly or  indirectly  in any  redistribution  or resale of any portion of the
interest  in  violation  of the  Securities  Act of  1933,  as  amended,  or any
applicable law.

     12.9  Survival  of  Rights.  Except as  herein  otherwise  provided  to the
contrary,  this Agreement  shall be binding upon and inure to the benefit of the
parties, their successors and assigns.

     12.10 Interpretation and Governing Law. When the context in which words are
used in this Agreement indicates that such is the intent,  words in the singular
number  shall  include the plural and vice versa.  The  masculine  gender  shall
include the feminine and neuter.  The Article and Section headings or titles and
the table of contents shall not define,  limit, extend or interpret the scope of
this Agreement or any  particular  Article or Section.  This Agreement  shall be
governed and  construed in  accordance  with the laws of the State of Washington
without giving effect to the conflicts of laws provisions thereof.

     12.11  Severability.  If any  provision,  sentence,  phrase or word of this
Agreement or the application thereof to any Person or circumstance shall be held
invalid, the remainder of this Agreement,  or the application of such provision,
sentence,  phrase, or word to Persons or  circumstances,  other than those as to
which it is held invalid, shall not be affected thereby.

     12.12 Agreement in Counterparts.  This Agreement may be executed in several
counterparts,  each of which shall be deemed an original, but all of which shall
constitute one and the same instrument.  In addition, this Agreement may contain
more than one  counterpart  of the  signature  pages and this  Agreement  may be
executed by the affixing of the signatures of each of the Members to one of such
                                                      -40-
<PAGE>


counterpart signature pages; all of such signature pages shall be read as though
one,  and they shall have the same force and effect as though all of the signers
had signed a single signature page.  12.13 Tax Matters Partner.  For purposes of
this Agreement,  the Managing Board shall designate  either a Member or a member
of the Managing Board as the Tax Matters  Partner (as defined in Section 6231 of
the Code).

     12.14  Third  Parties.   The  agreements,   covenants  and  representations
contained  herein are for the benefit of the parties hereto inter se. Nothing in
this  Agreement  is  intended to benefit any third  parties  including,  without
limitation,  any creditor of the Company  and/or any Member.  No creditor of the
Company or any Member will be entitled to require the Managing  Board to solicit
or accept any loan or  additional  capital  contribution  for the  Company or to
enforce  any right  which the  Company or any Member may have  against a Member,
whether arising under this Agreement or otherwise.

     12.15 Power of Attorney. Each Member hereby makes, constitutes and appoints
Stan Johnson,  or his successor in interest as determined by the Managing Board,
severally,   with   full   power  of   substitution,   his   true   and   lawful
attorneys-in-fact,  for him and in his name, place and stead and for his use and
benefit to sign and acknowledge,  file and record,  any amendments  hereto among
the Members for the further  purpose of  executing  and filing on behalf of each
Member,  any and all articles of organization  or other  documents  necessary to
constitute  the  Company  or to effect  the  continuation  of the  Company,  the
admission  or  withdrawal  of  members,  the  qualification  of the Company in a
foreign  jurisdiction  (or  amendment to such  qualification),  the admission of
substitute  Members or the  dissolution or termination of the Company,  provided
such  continuation,  admission,  withdrawal,  qualification,  or dissolution and
termination are in accordance with the terms of this Agreement.

     The foregoing power of attorney is a special power of attorney coupled with
an interest,  is  irrevocable  and shall  survive the death,  legal  incapacity,
dissolution  or Bankruptcy of each Member.  It may be exercised by said attorney
by listing all of the Members executing any instrument over the signature of the
attorney-in-fact acting for all of them. The power of attorney shall survive the
delivery of an  assignment by a Member of the whole or any portion of his or her
Unit.  In those cases in which the  assignee of, or the  successor  to, a Member
owning a Unit has been approved by the Members for admission to the Company as a
substitute  Member,  the power of attorney shall survive for the sole purpose of
enabling  the Managing  Board to execute,  acknowledge  and file any  instrument
necessary to effect such substitution.

     12.16  Arbitration.  Any dispute  arising out of or in connection with this
Agreement  or the breach  thereof  shall be decided by  arbitration  in Seattle,
Washington in accordance with the then effective commercial arbitration rules of
the American Arbitration Association, and judgment thereof may be entered in any
court having jurisdiction thereof.



                                                      -41-
<PAGE>


     IN WITNESS  WHEREOF,  the  undersigned,  being the Chairman of the Managing
Board and initial Members of the Company,  have caused this Agreement to be duly
adopted by the Company as of the date first written above,  and do hereby assume
and agree to be bound by and to  perform  all of the terms  and  provisions  set
forth in this Agreement.

                             MANAGING BOARD:

 

                             By:                                               
                                 ____________________________, Chairman

                             MEMBER:
                             SUN MEDICAL TECHNOLOGIES, INC.,
                               a California corporation

                             By:                                               
                                 Stan Johnson
                                 President


                                                      -42-
<PAGE>


                           COUNTERPART SIGNATURE PAGE


     By signing this  Counterpart  Signature Page, the undersigned  acknowledges
his  or her  acceptance  of  that  certain  Operating  Agreement  of  Washington
Urological Services, LLC, and his or her intention to be legally bound thereby.

                  Dated this _________ day of ___________________, 199__.



                                    ---------------------------

                                    Signature



                                    ---------------------------

                                    Printed Name




STATE OF _______________                    )
                                            )
COUNTY OF _____________                     )


     BEFORE ME, the  undersigned  Notary  Public in and for the State and County
set forth above, on the _______ day of _____________________,  199__, personally
appeared ____________________________, and, being by me first duly sworn, stated
that (s)he  signed  this  Counterpart  Signature  Page for the purpose set forth
above and that the statements contained therein are true.



                                    ---------------------------

                                    Signature of Notary Public



                                    ---------------------------

                                    Printed Name of Notary

My Commission Expires:

___________________________

[SEAL]

                                                      -43-
<PAGE>

           OPERATING AGREEMENT OF WASHINGTON UROLOGICAL SERVICES, LLC

                                   SCHEDULE I


Names and Address        Initial Capital
of Members         Contribution      Guaranty(1)             Percentage Interest

General Partner
Sun Medical 
Technologies, Inc.  $33,460             131,450                  23.90%

Limited partners
as a whole          114,150             418,550                  76.10%


     TOTALS       $ 147,610           $ 550,000                 100.00%        




(1) Represents the principal  portion of each Member's guaranty  obligation,  as
each Member's  obligation  under the Guaranty  includes not only principal,  but
also (as provided in the  Guaranty)  accrued and unpaid  interest,  late payment
penalties  and all  costs  incurred  by the  Bank in  collecting  any  defaulted
obligations.  The  principal  amount of the loan is  $550,000.  The Members will
guarantee  1% of the loan  (up to a $5,500  principal  guaranty)  for each  Unit
purchased as provided in the Memorandum.
                                                      -44-
<PAGE>


 




 








                        AGREEMENT OF LIMITED PARTNERSHIP


                                       OF

                           WYOMING UROLOGICAL SERVICES
                               LIMITED PARTNERSHIP








 
















<PAGE>

                                    AGREEMENT
                             OF LIMITED PARTNERSHIP
                                       OF
                 WYOMING UROLOGICAL SERVICES LIMITED PARTNERSHIP


                                TABLE OF CONTENTS

                                                                           Page
         1.       FORMATION..................................................1

         2.       NAME.......................................................1

         3.       OFFICES....................................................1

         4.       PURPOSE....................................................2

         5.       TERM.......................................................2

         6.       CERTAIN DEFINED TERMS......................................2

         7.       CAPITAL CONTRIBUTIONS AND DILUTION OFFERINGS...............6

         8.       GUARANTIES.................................................7

         9.       CONDITIONS TO THE CAPITAL CONTRIBUTIONS OF CERTAIN LIMITED
                  PARTNERS...................................................7

         10.      REPRESENTATIONS, WARRANTIES AND COVENANTS OF THE GENERAL
                  PARTNER....................................................7

         11.      ADMISSION OF LIMITED PARTNERS..............................8

         12.      CAPITAL ACCOUNTS...........................................9

         13.      ALLOCATIONS...............................................10

         14.      DISTRIBUTIONS.............................................11

         l5.      RIGHTS AND OBLIGATIONS OF LIMITED PARTNERS................11

         16.      LIMITED LIABILITY.........................................13

         17.      TRANSFER OF INTERESTS AND ADMISSION OF PARTNERS...........14


                                        i
<PAGE>


         18.      OPTIONAL PURCHASE OF LIMITED PARTNERSHIP INTERESTS ON CERTAIN
                  EVENTS.....................................................18

         19.      SALE, ASSIGNMENT OR OTHER TRANSFER OF THE GENERAL PARTNER'S
                  INTEREST...................................................24

         20.      TERMINATION OF THE SERVICES OF THE GENERAL PARTNER.........24

         21.      MANAGEMENT AND OPERATION OF BUSINESS.......................25

         22.      RESERVES...................................................28

         23.      INDEMNIFICATION AND EXCULPATION OF THE GENERAL PARTNER.....28

         24.      DISSOLUTION OF THE PARTNERSHIP.............................28

         25.      DISTRIBUTION UPON DISSOLUTION..............................30

         26.      BOOKS OF ACCOUNT, RECORDS AND REPORTS......................30

         27.      NOTICES....................................................31

         28.      AMENDMENTS.................................................32

         29.      LIMITATIONS ON AMENDMENTS..................................32

         30.      MEETINGS, CONSENTS AND VOTING..............................32

         31.      SUBMISSIONS TO THE LIMITED PARTNERS........................33

         32.      ADDITIONAL DOCUMENTS.......................................33

         33.      SURVIVAL OF RIGHTS.........................................33

         34.      INTERPRETATION AND GOVERNING LAW...........................33

         35.      SEVERABILITY...............................................33

         36.      AGREEMENT IN COUNTERPARTS..................................34

         37.      THIRD PARTIES..............................................34

         38.      POWER OF ATTORNEY..........................................34



                                       ii
<PAGE>

         39.      ARBITRATION................................................35

         40.      CREDITORS..................................................35


                                    SCHEDULES

Schedule A  -  Schedule of Partnership Interests


                                       iii
<PAGE>

     THE LIMITED PARTNERSHIP  INTERESTS  REPRESENTED BY THIS LIMITED PARTNERSHIP
AGREEMENT HAVE NOT BEEN REGISTERED  WITH THE SECURITIES AND EXCHANGE  COMMISSION
UNDER THE  SECURITIES  ACT OF 1933,  AS  AMENDED,  UNDER THE  SECURITIES  ACT OF
WYOMING,  AS AMENDED,  OR UNDER SIMILAR LAWS OR ACTS OF OTHER STATES IN RELIANCE
UPON  EXEMPTIONS  UNDER  SUCH  LAWS.  IN  ADDITION,   NO  TRANSFERS  OF  LIMITED
PARTNERSHIP  INTERESTS MAY BE MADE WITHOUT  COMPLIANCE WITH THE RESTRICTIONS SET
FORTH IN ARTICLE 17 BELOW.

                                    AGREEMENT
                             OF LIMITED PARTNERSHIP
                                       OF
                           WYOMING UROLOGICAL SERVICES
                               LIMITED PARTNERSHIP


     THIS  AGREEMENT  OF LIMITED  PARTNERSHIP  (the  "Agreement")  is made as of
February 24,  1999,  by and among SUN MEDICAL  TECHNOLOGIES,  INC., a California
corporation  and a wholly-owned  subsidiary of Prime Medical  Services,  Inc., a
Delaware  corporation (the "General Partner"),  and persons listed on Schedule A
attached hereto as the Limited Partners.
 
     1. FORMATION.

     The  Partnership  was  formed  pursuant  to the filing in the Office of the
Secretary of State of Wyoming on or about  November 10, 1998 of a Certificate of
Limited Partnership in accordance with the provisions of the Act.

     2. NAME.

     2.1 The name of the  Partnership is "Wyoming  Urological  Services  Limited
Partnership."

     2.2 The  Partnership  business  shall be conducted  under such names as the
General Partner may from time to time deem necessary or advisable, provided that
appropriate  amendments  to this  Agreement  and  all  necessary  filings  under
applicable assumed or fictitious name statutes or the Act are first obtained.

     3. OFFICES.

     3.1 The  principal  office of the  Partnership  shall be at 1301 Capital of
Texas Highway,  Suite C-300,  Austin, Texas 78746, or at such other place as the
General Partner may be required to maintain within the State of Wyoming pursuant
to the Act or may  otherwise,  from  time to time,  designate  by  notice to the
Limited Partners (the "Records Office").


                                       -1-
<PAGE>

     3.2 The Partnership may have such additional offices as the General Partner
may, from time to time, deem necessary or advisable.

     4. PURPOSE.

     The purpose and  business of the  Partnership  shall be: (i) to acquire and
operate  one or more  transportable  lithotripters  (or any  other  renal  stone
treatment  equipment) for the treatment of renal stones  primarily in Wyoming or
in such other  location(s)  as the General  Partner may  determine,  in its sole
discretion, to be in the best interests of the Partnership;  (ii) to acquire and
operate in the future any other urological device or equipment;  provided,  that
such equipment as of the date of acquisition by the Partnership has received FDA
premarket  approval;  (iii) to  acquire  an  interest  in any  business  entity,
including, without limitation, a limited partnership,  limited liability company
or corporation,  that engages in any business activity described in this Article
4; and (iv) to engage in any and all  activities  incidental  or  related to the
foregoing, upon and subject to the terms and conditions of this Agreement.

     5. TERM.

     The  Partnership  shall  terminate  on  December 31,  2048,  unless  sooner
terminated as herein provided.

     6. CERTAIN DEFINED TERMS.

     Certain terms used in this Agreement shall have the following meanings:

     Act. The Act means the Wyoming Uniform Limited  Partnership Act, as then in
effect.

     Affiliate.  An  Affiliate  is  (i) any  person,  partnership,  corporation,
association or other legal entity ("person") directly or indirectly controlling,
controlled  by or under  common  control with another  person;  (ii) any  person
owning or controlling  10% or more of the  outstanding  voting  interest of such
other person; (iii) any officer, director or partner of such person; and (iv) if
such other person is an officer,  director or partner, any entity for which such
person acts in such capacity.

     Agreement.  This  Agreement  of  Limited  Partnership,  as the  same may be
amended from time to time.

     Bank. Firsts-Citizens Bank & Trust Company.

     Capital Account.  The Partnership  capital account of a Partner as computed
pursuant to Article 12 of this Agreement.



                                       -2-
<PAGE>

     Capital  Contributions.  All capital contributions made by a Partner or his
or  her  predecessor  in  interest  which  shall  include,  without  limitation,
contributions made pursuant to Article 7 of this Agreement.

     Capital  Transaction.  Any transaction which, were it to generate proceeds,
would produce Partnership Sales Proceeds or Partnership Refinancing Proceeds.

     Code.  The Internal  Revenue  Code of 1986,  as amended,  or  corresponding
provisions of subsequent, superseding revenue laws.

     Dilution Offering. As provided in Article 7.4 of this Agreement, the future
offering of  additional  limited  partnership  interests in the  Partnership  as
determined by the General Partner.  Except as otherwise provided in Article 7.4,
any  successful  Dilution  Offering will  proportionately  reduce the Percentage
Interests of the then current Partners in the Partnership.

     Domestic Proceeding. Any divorce, annulment, separation or similar domestic
proceeding between a married couple.

     Equipment.  The equipment used in the operation of the Lithotripter System,
including the mobile  transport  vehicle,  the  transportable  lithotripter  and
miscellaneous  medical  equipment  and  supplies,  and  any  similar  additional
equipment acquired by the Partnership in the future.

     FDA. The United States Food and Drug Administration.

     General  Partner.  The  general  partner of the  Partnership,  Sun  Medical
Technologies,  Inc., a California  corporation and a wholly-owned  subsidiary of
Prime Medical Services, Inc., a Delaware corporation.

     Guaranty.  The Guaranty  Agreement  pursuant to which each Limited  Partner
will guarantee a portion of the Partnership's  obligations to the Bank under the
Loan. The form of the Guaranty Agreement is included in the Subscription  Packet
accompanying the Memorandum.

     Initial  Limited  Partner.  Stan  Johnson,  a resident  of  Arizona  and an
Affiliate of the General Partner.  The Initial Limited Partner is to be the only
limited partner of the Partnership  until such time as the new Limited  Partners
are admitted to the Partnership, at which time the Initial Limited Partner shall
withdraw from the Partnership.
 
     Limited  Partners.  The Limited  Partners are those  investors in the Units
admitted to the  Partnership  and any person  admitted  as a Limited  Partner in
accordance with the provisions of this Agreement.



                                       -3-
<PAGE>

     Lithotripter.  The extracorporeal shock-wave lithotripter to be acquired by
the Partnership and any replacements therefor or additional  lithotripters to be
purchased by the Partnership.

     Lithotripter   System.   The  mobile  transport   vehicle  and  operational
Lithotripter.

     Loan.  The loan of up to $477,000  from the Bank to the  Partnership.  Loan
proceeds  will be used  by the  Partnership  to (i)  acquire  an  extracorporeal
shockwave  lithotripter with options  (estimated at $400,000),  (ii) acquire and
upfit a mobile van to  transport  the  lithotripter  (estimated  at $50,000) and
(iii) pay sales taxes on the purchase of the Lithotripter  System  (estimated at
$27,000).

     Losses.  The net loss (including Net Losses from Capital  Transactions)  of
the  Partnership  for each Year of the  Partnership  as  determined  for federal
income tax purposes.

     Majority in Interest of the Limited Partners. The Limited Partners who hold
more than 50% of the Percentage Interests in the Partnership held by the Limited
Partners.

     Memorandum.   The  Confidential   Private   Placement   Memorandum  of  the
Partnership dated January 5, 1999, as amended or as supplemented.

     Net Gains from Capital Transactions.  The gains realized by the Partnership
as a result of or upon any sale, exchange,  condemnation or other disposition of
the  capital  assets  of  the  Partnership  (which  assets  shall  include  Code
Section 1231 assets) or as a result of or upon the damage or destruction of such
capital assets.

     Net  Losses  from  Capital   Transactions.   The  losses  realized  by  the
Partnership  as a result of or upon any sale,  exchange,  condemnation  or other
disposition of the capital assets of the  Partnership  (which shall include Code
Section 1231 assets) or as a result of or upon the damage or destruction of such
capital assets.

     Offering.  The offer to  potential  investors  of 80 Units  pursuant to the
Memorandum.

     Partners. The General Partner and the Limited Partners, collectively, where
no distinction is required by the context in which the term is used herein.

     Partnership.  Wyoming Urological  Services Limited  Partnership,  a Wyoming
limited partnership.

     Partnership Cash Flow. For the applicable  period,  the excess,  if any, of
(A) the sum of (i) all  gross  receipts  from any source for such period,  other
than from Partnership loans, Capital Transactions and Capital Contributions, and
(ii) any funds released by the Partnership from previously established reserves,
over (B) the sum of (i) all cash expenses paid by the Partnership for


                                       -4-
<PAGE>

     such period;  (ii) the  amount of all payments of principal on loans to the
Partnership;  (iii) capital  expenditures  of  the  Partnership;  and  (iv) such
reasonable  reserves as the General  Partner shall deem  necessary or prudent to
set  aside  for  future  repairs,   improvements  or  equipment  replacement  or
additions,  or to meet working  capital  requirements  or foreseen or unforeseen
future liabilities and contingencies of the Partnership; provided, however, that
the  amounts  referred  to in (B)(i),  (ii) and (iii)  above shall be taken into
account  only to the extent not funded by Capital  Contributions,  loans or paid
out of previously  established reserves.  Such term shall also include all other
funds deemed  available for  distribution  and designated as  "Partnership  Cash
Flow" by the General Partner.

     Partnership  Interest.  The  interest  of a Partner in the  Partnership  as
defined by the Act and this Agreement.

     Partnership Refinancing Proceeds. The cash realized from the refinancing of
Partnership assets after retirement of any secured loans and less (i) payment of
all  expenses  relating  to  the  transaction  and  (ii) establishment  of  such
reasonable  reserves as the General  Partner shall deem  necessary or prudent to
set  aside  for  future  repairs,  improvements,  or  equipment  replacement  or
additions,  or to meet working  capital  requirements  or foreseen or unforeseen
future liabilities or contingencies of the Partnership.

     Partnership  Sales  Proceeds.  The cash realized  from the sale,  exchange,
casualty or other  disposition of all or a portion of  Partnership  assets after
the  retirement  of all secured  loans and less (i) the  payment of all expenses
related to the transaction and (ii) establishment of such reasonable reserves as
the  General  Partner  shall deem  necessary  or prudent to set aside for future
repairs, improvements, or equipment replacement or additions, or to meet working
capital   requirements   or  foreseen  or  unforeseen   future   liabilities  or
contingencies of the Partnership.

     Percentage Interest. The interest of each Partner in the Partnership, to be
determined initially in the case of a Limited Partner by reference to his or her
Unit  ownership  based  upon the  Limited  Partners  holding  an  aggregate  80%
Percentage Interest in the Partnership, with each initial Unit sold representing
an initial 1% interest.  The General Partner will initially own a 20% Percentage
Interest in the Partnership. A Partner's Percentage Interest may be reduced by a
future Dilution Offering.  The Partners' Percentage Interests in the Partnership
as of the date hereof are as set forth in Schedule A attached hereto. Any future
adjustments  in the  Partners'  Percentage  Interests,  due to  future  Dilution
Offerings or otherwise, will also be reflected by amendments to Schedule A.

     Profit. The net income of the Partnership (including Net Gains from Capital
Transactions)  for each Year of the Partnership as determined for federal income
tax purposes.

     Pro Rata Basis.  In  connection  with an  allocation  or  distribution,  an
allocation or distribution in proportion to the respective  Percentage Interests
of the class of Partners to which reference is made.



                                       -5-
<PAGE>

     Sales Agency  Agreement.  The sales agency agreement  through which MedTech
Investments,  Inc.,  an  Affiliate  of the General  Partner and a  broker-dealer
company  registered with the Securities and Exchange  commission and a member of
the National  Association of Securities  Dealers,  Inc. shall offer and sell the
limited partnership interest of the Partnership pursuant to the Memorandum.

     Sales  Commission.  The $250 sales commission paid to MedTech  Investments,
Inc. for each Unit sold.

     Service. The Internal Revenue Service.

     Units.  The 80 equal limited partner  interests in the Partnership  offered
pursuant  to the  Memorandum  for a price  per Unit of  $2,500  in cash,  plus a
personal guaranty of 0.5% of the Partnership's obligations under the Loan (up to
$2,385 principal guaranty obligation).

     Year. An annual accounting period ending on December 31 of each year during
the term of the Partnership.

     7. CAPITAL CONTRIBUTIONS AND DILUTION OFFERINGS.

     7.1 General Partner Contribution.  On or before the date of this Agreement,
the General Partner will  contribute to the capital of the  Partnership  cash in
the amount  equal to 30% (up to  $75,000) of the total cash  contributed  to the
Partnership by the Partners in the Offering made pursuant to the Memorandum.

     7.2 Limited  Partner  Contribution.  Each Limited  Partner hereby agrees to
contribute and shall contribute to the capital of the Partnership on the date of
his or her admission to the  Partnership  the cash amount set forth opposite his
or her name on Schedule A attached hereto.

     7.3 No Interest.  Except as otherwise provided herein, no interest shall be
paid on any contribution to the capital of the Partnership.

     7.4 Dilution  Offerings.  If the General  Partner,  in its sole discretion,
determines  that it is in the best  interest  of the  Partnership,  the  General
Partner may, from time to time,  offer, sell and issue, for and on behalf of the
Partnership,  additional  limited  partnership  interests in the  Partnership (a
"Dilution   Offering")  to  investors  who  are  not  already  Limited  Partners
("Qualified  Investors").  The primary purpose of any Dilution Offering would be
to raise additional capital for any legitimate  Partnership purpose as set forth
in Article 4. Any limited partnership  interests offered by the Partnership in a
Dilution  Offering  shall  be sold in the  manner  and  according  to the  terms
prescribed in the sole  discretion of the General  Partner;  provided,  however,
that any additional limited partnership interests offered in a Dilution Offering
will be sold for a price no lower than the highest price for which proportionate
limited  partnership  interests in the Partnership  have been previously sold by
the Partnership unless otherwise determined by a vote of the General Partner and


                                       -6-
<PAGE>

a Majority in Interest of the Limited Partners.  Any sale of additional  limited
partnership  interests  will  result  in  the  proportionate   dilution  of  the
Percentage Interests of the existing Partners. Notwithstanding the above, in the
event of a  Dilution  Offering,  the  General  Partner  may  elect,  in its sole
discretion,   to  prevent   dilution  of  its  Percentage   Interest  by  either
contributing  additional  capital to the  Partnership  or purchasing  additional
limited partnership  interests in any Dilution Offering.  Limited Partners shall
have no right to purchase  additional  limited partner interests in any Dilution
Offering or to make additional capital contributions or take any other action to
prevent dilution of their Percentage Interest.  Any investor acquiring a limited
partnership interest in a Dilution Offering shall agree to be bound by the terms
of this Agreement,  and shall be automatically  admitted as a Limited Partner of
the Partnership.  Any adjustment in the Partners' Percentage Interests resulting
from a  Dilution  Offering  shall be set forth on an  amended  Schedule  A to be
attached hereto.

     8. GUARANTIES.

     Each Partner  agrees to execute and deliver to the  Partnership on the date
of his or her  admission to the  Partnership  a Guaranty in the amount set forth
opposite his or her name on Schedule A attached hereto.

     9. CONDITIONS TO THE CAPITAL CONTRIBUTIONS OF CERTAIN LIMITED PARTNERS.

     The  obligations  of  any  Limited  Partners  acquiring  their  Partnership
Interests  in  the  Offering  or  a  Dilution  Offering  to  make  cash  Capital
Contributions  hereunder are subject to the condition that the  representations,
warranties,  agreements  and  covenants  of the  General  Partner  set  forth in
Article 10 of this  Agreement are and shall be true and correct or have been and
will have been complied  with in all material  respects on the date such Capital
Contributions  are  required  to be made,  except  to the  extent  that any such
representation or warranty expressly pertains to an earlier date.

     10. REPRESENTATIONS, WARRANTIES AND COVENANTS OF THE GENERAL PARTNER.

     10.1 The General  Partner  hereby  represents  and  warrants to the Limited
Partners that:

     (a) The Partnership is a limited  partnership formed in accordance with and
validly  existing  under the Act and the other  applicable  laws of the State of
Wyoming;

     (b) The interests in the Partnership of the Limited Partners will have been
duly  authorized or created and validly  issued and the Limited  Partners  shall
have no personal liability to contribute money to the Partnership other than the
amounts


                                       -7-
<PAGE>

agreed to be  contributed  by them in the  manner  and on the terms set forth in
this Agreement,  subject,  however,  to such limitations as may be imposed under
the Act;

     (c) Except as  disclosed in the  Memorandum  or  documentation  prepared in
connection  with a Dilution  Offering,  no material breach or default adverse to
the Partnership exists under the terms of any other material agreement affecting
the Partnership; and

     (d) The General  Partner is a  California  corporation  formed and existing
under the laws of the State of California.

     10.2 The General Partner hereby covenants to the Limited Partners that:

     (a) It will at all times act in a  fiduciary  manner  with  respect  to the
Partnership and the Limited Partners;

     (b) Except as provided in Article 19, it will serve as the General  Partner
of the Partnership until the Partnership is terminated  without  reconstitution;
and

     (c) It will  cause the  Partnership  to carry  adequate  public  liability,
property  damage and other  insurance  as is  customary  in the  business  to be
engaged in by the Partnership.

     11. ADMISSION OF LIMITED PARTNERS.

     The General  Partner  may permit the offer and sale of limited  partnership
interests  on the terms and  conditions  provided  in the  Memorandum  or future
Dilution  Offerings and may admit persons  subscribing  for interests as Limited
Partners  in the  Partnership  on the  terms  and  conditions  set forth in this
Article 11.

     (a) The General Partner shall have approved of the admission of said person
in writing on such terms and conditions as the General Partner shall determine;

     (b) Said person shall have executed such  documents or  instruments  as the
General  Partner may deem  necessary or desirable to effect his or her admission
as a Limited Partner;

     (c) Said  person  shall  have  accepted  and  adopted  all of the terms and
provisions of this Agreement, as then amended;



                                       -8-

     (d) Said person (if a corporation)  shall deliver to the General  Partner a
certified  copy of a  resolution  of its Board of  Directors  authorizing  it to
become a Limited Partner under the terms and conditions of this Agreement; and

     (e) Said  person,  upon  request  by the  General  Partner,  shall pay such
reasonable  expenses as may be incurred in  connection  with its  admission as a
Limited Partner.

     12. CAPITAL ACCOUNTS.

     A Capital  Account shall be  established  for each Partner and shall at all
times be  determined  and  maintained  in  accordance  with the  Final  Treasury
Regulations  under  Section 704(b)  of the Code,  as the same may be amended.  A
Partner shall not be entitled to withdraw any part of his or her Capital Account
or to receive  any  distribution  from the  Partnership,  except as  provided in
Articles 14 and 25.

     (a) Each Partners' Capital Account shall be increased by:

     (i) The amount of his or her Capital  Contribution  pursuant to  Article 7;
and

     (ii) The amount of Profits  allocated to him or her pursuant to Article 13;
and

     (iii) The Partner's pro rata share  (determined  in the same manner as such
Partner's share of Profits and Losses allocated  pursuant to Article 13  hereof)
of any income or gain exempt from tax.

     (b) Each Partner's Capital Account shall be decreased by:

     (i) The amount of Losses  allocated to him or her  pursuant to  Article 13;
and

     (ii) The amount of Partnership  Cash Flow,  Partnership  Sales Proceeds and
Partnership  Refinancing  Proceeds distributed to him or her pursuant to Article
14; and

     (iii)  The  Partner's  pro rata  share  of any  other  expenditures  of the
Partnership which are not deductible in computing  Partnership Profits or Losses
and which are not added to the tax basis of any Partnership property, including,
without limitation,  expenditures described in Section 705(a)(2)(B) of the Code.
The  Partner's  pro rata share of such  expenditures  shall be determined in the
same manner as


                                       -9-
<PAGE>

such Partner's share of Profits and Losses allocated pursuant to Article 13.

     13. ALLOCATIONS

     (a) Profits and Losses.  The Profits and Losses of the Partnership shall be
allocated  among the Partners in  accordance  with their  respective  Percentage
Interests.  In allocating  Profits and Losses, Net Gains and Losses from Capital
Transactions (a part of Profits and Losses), if any, shall be allocated first.

     (b)  Qualified  Income  Offset.  If any Partner  unexpectedly  receives any
adjustment, allocation or distribution described in Treasury Regulations Section
1.704-1(b)(2)(ii)(d)(4)  through (6) which causes or increases a deficit balance
in such  Partner's  Capital  Account  (adjusted  for this  purpose in the manner
provided  in  Treasury  Regulations  Section  1.704-1(b)(2)(ii)(d)),   items  of
Partnership income and gain shall be specially allocated to each such Partner in
an amount and manner  sufficient  to  eliminate,  to the extent  required by the
Regulations, the deficit Capital Account of such Partner as quickly as possible,
provided that an allocation  pursuant to this Article 13(b) shall be made if and
only to the extent that such Partner would have a deficit  Capital Account after
all other allocations provided for in this Article 13 have been tentatively made
as if this Article 13(b) were not in the  Agreement.  This provision is intended
to be a "qualified  income offset," as defined in Treasury  Regulations  Section
1.704-1(b)(2)(ii)(d),  such Regulation being specifically incorporated herein by
reference.

     (c) Sales Commission.  The Sales Commission shall be allocated to the Units
which are not held by the General Partner and its Affiliates and are acquired in
the Offering in proportion to the respective capital  contributions  represented
by such Units (i.e.,  $250 in Sales Commissions per each such Unit). The purpose
of this Article 13(c) is to allocate the Sales  Commission to those Partners who
actually bore the burden of paying the Sales Commission.

     (d)  Allocations  Between  Transferor and  Transferee.  In the event of the
transfer (other than the pledges of the General Partner's  interest permitted by
Article 19 or Permitted Pledges described in Article 17.2(b)) of all or any part
of a Partner's interest (in accordance with the provisions of this Agreement) in
the Partnership at any time other than at the end of a Year, or the admission of
a new Partner (in accordance with the terms of this Agreement), the transferring
Partner  or  new  Partner's  share  of the  Partnership's  income,  gain,  loss,
deductions and credits, as computed both for accounting purposes and for federal
income tax purposes,  shall be allocated between the transferor  Partner and the
transferee Partner (or Partners),  or the new Partner and the other Partners, as
the case may be, in the same ratio as the number of days in such Year before and
after the date of the transfer or admission;


                                      -10-
<PAGE>

provided,  however,  that if there has been a sale or other  disposition  of the
assets of the  Partnership  (or any part  thereof)  during  such Year,  then the
General Partner may elect, in its sole  discretion,  to treat the periods before
and after the date of the transfer or  admission as separate  Years and allocate
the Partnership's net income, gain, net loss, deductions and credits for each of
such deemed separate Years.  Notwithstanding  the foregoing,  the  Partnership's
"allocable  cash basis items," as that term is used in Section  706(d)(2)(B)  of
the Code,  shall be allocated  as required by Section  706(d)(2) of the Code and
the regulations thereunder.

(e) Tax  Withholding.  The Partnership  shall be authorized to pay, on behalf of
any Partner, any amounts to any federal, state or local taxing authority, as may
be necessary for the  Partnership to comply with tax  withholding  provisions of
the Code or the other income tax or revenue laws of any taxing authority. To the
extent the  Partnership  pays any such amounts that it may be required to pay on
behalf of a Partner,  such amounts  shall be treated as a cash  distribution  to
such  Partner  and shall  reduce  the  amount  otherwise  distributable  to such
Partner.

     14. DISTRIBUTIONS.

     (a) Distribution of Partnership  Cash Flow.  Partnership Cash Flow shall be
distributed  to the  Partners  within  60 days  after the end of each  Year,  or
earlier  in the  discretion  of the  General  Partner,  in  proportion  to their
respective Percentage Interests at the time of distribution.
 
     (b) Distribution of Partnership  Refinancing Proceeds and Partnership Sales
Proceeds.  Partnership Refinancing Proceeds and Partnership Sales Proceeds shall
be distributed to the Partners within 60 days of the Capital  Transaction giving
rise to such proceeds,  or earlier in the discretion of the General Partner,  in
proportion to their respective Percentage Interests at the time of distribution.

     (c) Distribution in Liquidation.  Upon liquidation of the Partnership,  all
of the  Partnership's  property  shall be sold and Profits and Losses  allocated
accordingly.   Proceeds  from  the  liquidation  of  the  Partnership  shall  be
distributed in accordance with Article 25.

     l5. RIGHTS AND OBLIGATIONS OF LIMITED PARTNERS.

     15.1 Management. The Limited Partners shall not take part in the management
of the business,  nor transact any business for the Partnership,  nor shall they
have power to sign for or to bind the Partnership. The Partnership may, however,
contract  with  one or  more  Limited  Partners  to act  as  the  local  medical
director(s) of the Lithotripter System. No Limited Partner may withdraw from the
Partnership except as expressly permitted herein.



                                      -11-
<PAGE>

     15.2  Operation of  Lithotripter  System.  The Limited  Partners  shall not
operate or utilize  the  Partnership  Lithotripter  System or other  Partnership
equipment except pursuant to (i) an agreement with the Partnership;  or (ii) any
other arrangement specifically approved by the General Partner.

     15.3 Outside Activities. The Limited Partners agree that they owe fiduciary
duties to the Partnership  and, as a consequence,  each Limited Partner (that is
not the General  Partner or an  Affiliate  of the General  Partner)  agrees that
(s)he shall not engage in "Outside Activities" (as defined below) in the "Market
Area" (as defined below)  while(s)he is a Limited Partner in the Partnership and
shall  otherwise be subject to the  provisions of this Article 15.3.  The phrase
"Outside Activities" means directly or indirectly owning,  leasing or subleasing
a lithotripter (or any similar  equipment or competing devices used for treating
renal or biliary stone disease) or any other therapeutic  equipment  acquired by
the Partnership.  Prohibited indirect ownership shall include without limitation
the direct or indirect  ownership of any interest in a business venture (through
stock ownership, partnership interest ownership, ownership by or through a close
family member, or as otherwise  determined in good faith by the General Partner)
involving the ownership,  purchase,  lease, sublease,  promotion,  management or
operation of a lithotripter (or similar  equipment or competing devices used for
treating renal or biliary stone disease) or other competing device or equipment,
unless the General Partner determines that such activity by the Limited Partners
is not  detrimental to the best interests of the  Partnership.  The ownership of
less than 1% of the capital stock  (calculated  on a fully  diluted  basis) of a
corporation  whose stock is  publicly  owned or  regularly  traded on any public
exchange shall not constitute an Outside Activity.

     Upon the  termination  or transfer of a Limited  Partner's  interest in the
Partnership  for any  reason,  including  a transfer  pursuant  to Article  18.3
hereof, the withdrawing Limited Partner shall not, for a period of two (2) years
following  the date of  withdrawal,  engage  in any  Outside  Activities  in any
"Market Area" in which the  Partnership  is  transacting  business or within the
prior twelve months has transacted business (the "Restricted  Facilities").  For
the purposes of this  Article 15.3,  the term  "Market  Area" shall mean (i) the
area within a fifty (50) mile  radius of any  Restricted  Facility,  but if such
area is determined by a court of competent jurisdiction to be too broad, then it
shall  mean (ii) the area  within a thirty  (30) mile  radius of any  Restricted
Facility, but if such area is determined by a court of competent jurisdiction to
be too broad then it shall mean (iii) the area within a fifteen (15) mile radius
of any Restricted Facility.

     In the event a Limited  Partner  wishes and intends to engage in an Outside
Activity in a Market Area, he or she must provide  written notice of such intent
to the General  Partner prior to engaging in the Outside  Activity.  The written
notice shall be deemed an election by the Limited  Partner to withdraw  from the
Partnership (the "Notice of Withdrawal"), and shall give the General Partner the
purchase  rights as  provided  in  Article  18.3  hereof.  After  the  Notice of
Withdrawal,  the former Limited Partner may engage in an Outside Activity in the
Market Area only after waiting the period of two years specified in this Article
15.3. In the event of breach of the waiting  period,  the  Partnership  shall be
entitled to any remedy at law or equity with respect to such  breach,  including
without limitation an injunction or suit for damages.


                                      -12-
<PAGE>

     If a Limited  Partner during his or her  participation  in the  Partnership
engages in an Outside  Activity in a Market Area  without  first  notifying  the
General  Partner in violation of this Article 15.3, the Limited Partner shall be
deemed to have  given a Notice of  Withdrawal  on the date the  General  Partner
first  becomes  aware of the Limited  Partner's  Outside  Activity in the Market
Area.  Upon  receiving a Limited  Partner's  Notice of  Withdrawal or equivalent
thereof, the Partnership may invoke the purchase rights provided in Article 18.3
and shall be entitled  to any other  remedy at law or equity  including  without
limitation an injunction or suit for damages.
 
     15.4   Disclosure  of  Confidential   Information.   Each  Limited  Partner
acknowledges and agrees that his or her  participation in the Partnership  under
this Agreement  necessarily  involves his or her  understanding of and access to
certain  trade  secrets and other  confidential  information  pertaining  to the
business of the Partnership.  Accordingly,  each Limited Partner (other than the
General   Partner  and  its  Affiliates  that  may  also  hold  Limited  Partner
Partnership  Interests) agrees that at all times during his or her participation
in the Partnership as a Limited Partner and thereafter, (s)he will not, directly
or indirectly, without the express written authority of the Partnership,  unless
required by law or directed by a applicable legal authority having  jurisdiction
over  the  Limited  Partner,  disclose  or use for the  benefit  of any  person,
corporation  or other  entity  (other  than  the  Partnership),  or the  Limited
Partner, (i) any trade, technical, operational, management or other secrets, any
patient or customer  lists or other  confidential  or secret data,  or any other
proprietary,  confidential or secret  information of the Partnership or (ii) any
confidential information concerning any of the financial arrangements, financial
condition,  hospital or  physician  contracts,  third party payor  arrangements,
quality assurance and outcome analysis programs, competitive status, customer or
supplier matters, internal organizational matters, technical abilities, or other
business affairs of or relating to the Partnership.  The Limited Partners (other
than the General  Partner and its Affiliates  that may also hold Limited Partner
Partnership  Interests)  acknowledge  that  all  of  the  foregoing  constitutes
proprietary information,  which is the exclusive property of the Partnership. In
the event of breach of this Article 15.4 as determined  by the General  Partner,
the Partnership shall be entitled to any remedy at law or equity with respect to
such breach, including without limitation, an injunction or suit for damages.

     16. LIMITED LIABILITY.

     No  Limited  Partner  shall be  required  to make any  contribution  to the
capital  of the  Partnership  except  as set forth in  Article  7, nor shall any
Limited  Partner  in his or her  capacity  as such,  be bound by, or  personally
liable for, any expense,  liability or obligation of the  Partnership  except to
the extent of his or her (i) interest in the  Partnership;  (ii)  Guaranties  of
Partnership  obligations;  and (iii) obligation to return  distributions made to
him or her under certain circumstances as required by the Act.



                                      -13-
<PAGE>

     17. TRANSFER OF INTERESTS AND ADMISSION OF PARTNERS.

     17.1 Transferability.

     (a) The term  "transfer"  when used in this  Agreement  with  respect  to a
Partnership Interest includes a sale, assignment,  gift, pledge, exchange or any
other  disposition  (but  does  not  include  the  issuance  of new  Partnership
Interests pursuant to a Dilution Offering);

     (b) Except as otherwise  provided herein,  the General Partner shall not at
any time transfer or assign its interest or obligation as General Partner;

     (c)  The  Partnership   Interest  of  any  Limited  Partner  shall  not  be
transferred,  in whole or in part,  except in accordance with the conditions and
limitations set forth in Articles 17.2 or 18;

     (d) The transferee of a Partnership  Interest by  assignment,  operation of
law or otherwise,  shall have only the rights,  powers and privileges enumerated
in Article  17.3 or  otherwise  provided  by law and may not be  admitted to the
Partnership  as a Limited  Partner  except as provided  in Article  17.4 or as a
General Partner except as provided in Article 17.5;

     (e) Notwithstanding  any provision herein to the contrary,  the Partnership
Agreement  shall in no way  restrict  the  issuance or transfers of stock of the
General Partner; and

     (f) Notwithstanding  any provision herein to the contrary,  the issuance of
Partnership  Interests  pursuant to a Dilution Offering and the admission of new
Limited  Partners  pursuant  to a Dilution  Offering  shall be  governed  by the
provisions of Article 7.4 of this Agreement.

     17.2 Restrictions on Transfers by Limited Partners.

     (a) All or part of a Partnership  Interest may be  transferred by a Limited
Partner  only with the prior  written  approval  of the General  Partner,  which
approval may be granted or denied in the sole discretion of the General Partner.

     (b) The General  Partner  shall not approve any  transfer of a  Partnership
Interest,  except a pledge of any Partnership Interest by the General Partner to
any bank, insurance company or other financial  institution to secure payment of
indebtedness (a "Permitted Pledge"), or otherwise unless the proposed transferee
shall have furnished the General Partner with a sworn statement that:



                                      -14-
<PAGE>

     (i) The  proposed  transferee  proposes to acquire  his or her  Partnership
Interest  as a  principal,  for  investment  and not  with a view to  resale  or
distribution;

     (ii)  The   proposed   transferee   meets   such   requirements   regarding
sophistication, income and net worth as required by applicable state and federal
securities laws;

     (iii) The proposed transferee has met such net worth and income suitability
standards as have been established by the General Partner;

     (iv) The proposed transferee  recognizes that investment in the Partnership
involves  certain risks and has taken full  cognizance of and understands all of
the risk factors related to the purchase of a Partnership Interest; and

     (v) The proposed  transferee has met all other  requirements of the General
Partner for the proposed transfer.

     (c)  Other  than  in the  case  of a  Permitted  Pledge,  a  transfer  of a
Partnership  Interest  may be made  only  if,  prior to the  date  thereof,  the
Partnership  upon request  receives an opinion of counsel,  satisfactory in form
and substance to the General Partner, that neither the offering nor the proposed
transfer will require  registration under federal or applicable state securities
laws or regulations.

     17.3 Rights of Transferee. Unless admitted to the Partnership in accordance
with Article 17.4, the transferee of a Partnership Interest or a part thereof or
any right, title or interest therein shall not be entitled to any of the rights,
powers,  or privileges of his or her predecessor in interest,  except that (s)he
shall  be  entitled  to  receive  and be  credited  or  debited  with his or her
proportionate share of Partnership income, gains, Profits,  Losses,  deductions,
credits or distributions.

     17.4 Admission of Limited Partners. Except as otherwise provided in Article
18, the General  Partner,  or the  transferee of all or part of the  Partnership
Interest of either a General  Partner or a Limited  Partner,  may be admitted to
the  Partnership as a Limited Partner upon furnishing to the General Partner all
of the following:

     (a) The  written  approval  of a Majority in Interest of all of the Limited
Partners (except the assignor  Partner),  or the assignor  Partner alone,  which
approval  may be granted or denied in the sole  discretion  of such  Partners or
Partner (as the case may be);



                                      -15-
<PAGE>

     (b) The written  approval of the General  Partner,  which  approval  may be
granted or denied in the sole discretion of the General Partner;

     (c) Acceptance,  in a form satisfactory to the General Partner,  of all the
terms and  conditions  of this  Agreement  and any other  documents  required in
connection with the operation of the  Partnership  pursuant to the terms of this
Agreement;

     (d) A properly executed power of attorney  substantially  identical to that
contained in Article 38;

     (e) Such other  documents  or  instruments  as may be  required in order to
effect his or her admission as a Limited Partner; and

     (f) Payment of such  reasonable  expenses as may be incurred in  connection
with his or her admission as a Limited Partner.

     17.5 Admission of General Partners. A Limited Partner, or the transferee of
all or part of the Partnership  Interest of the General Partner, may be admitted
to the  Partnership as a general  partner upon furnishing to the General Partner
all of the following:

     (a) The  written  consent of both the  General  Partner  and a Majority  in
Interest of the Limited Partners,  which consent may be granted or denied in the
sole discretion of the Partners;

     (b)  Such  financial  statements,  guarantees  or other  assurances  as the
General  Partner may require with regard to the ability of the proposed  general
partner to fulfill the financial obligations of a general partner hereunder;

     (c) Acceptance,  in form  satisfactory to the General  Partner,  of all the
terms and  provisions  of this  Agreement  and any other  documents  required in
connection with the operation of the  Partnership  pursuant to the terms of this
Agreement;

     (d) A certified  copy of a resolution of its Board of Directors (if it is a
corporation)  authorizing  it to  become a general  partner  under the terms and
conditions of this Agreement;

     (e) A power  of  attorney  substantially  identical  to that  contained  in
Article 38;

     (f) Such other  documents  or  instruments  as may be  required in order to
effect its admission as a general partner; and


                                      -16-
<PAGE>

     (g) Payment of such  reasonable  expenses as may be incurred in  connection
with its admission as a general partner.

     Notwithstanding  the above, a transferee  that controls or is controlled by
the General  Partner or one or more of its Affiliates  that receives all or part
of the  Partnership  Interest  of the  General  Partner  may be  admitted to the
Partnership  as a general  partner upon  complying  with all the  provisions  of
Article 17.5 except for subparagraph  17.5(a).  As long as the transferee either
controls  or is  controlled  by  the  General  Partner  or one  or  more  of its
Affiliates,  no  Limited  Partner  consents  will  be  required  to  admit  such
transferee as a general  partner to the  Partnership,  unless and then solely to
the extent expressly required by he Act.

     17.6 Amendment of Certificate of Limited Partnership and Qualification. The
General  Partner shall take all steps  necessary and  appropriate to prepare and
record any  amendments  to the  Certificate  of Limited  Partnership,  as may be
necessary or appropriate  from time to time to comply with the  requirements  of
the Act, including, without limitation, upon the admission to the Partnership of
any general partner pursuant to the provisions of Article 17.5, and may for this
purpose exercise the power of attorney delivered to the General Partner pursuant
to Article 17.5 or 38. In  addition,  the General  Partner  shall take all steps
necessary and appropriate to prepare and record any and all documents  necessary
to qualify the Partnership to do business in jurisdictions where the Partnership
is doing  business,  and may for this  purpose  exercise  the power of  attorney
delivered to the General Partner pursuant to Articles 17.4, 17.5 or 38.

     17.7  Fundamental  Changes.  In the event a plan is approved by the General
Partner  providing  for the  merger or  consolidation  of the  Partnership  with
another  person  or  entity,  or the  sale  of all or  substantially  all of the
Partnership Interests,  including without limitation the exchange of Partnership
Interests for equity  interests in another person or entity or for cash or other
consideration  or  combination  thereof,  then and in such  event,  the  Limited
Partners shall be obligated to take or refrain from taking,  as the case may be,
such actions as the plan may provide, including,  without limitation,  executing
such  instruments,  and providing such  information as the General Partner shall
reasonably  request.  Any plan described in this Article 17.7 may also effect an
amendment to the  Partnership  Agreement  or the  adoption of a new  partnership
agreement in connection with the merger of the  Partnership  with another person
or entity. The plan may also provide that the General Partner and its Affiliates
shall receive fees for services rendered in connection with the operation of the
Partnership  or  any  successor   entity   following  the  consummation  of  the
transactions described in the plan, and neither the Partnership nor the Partners
shall  have  any  right  by  virtue  of this  Agreement  in the  income  derived
therefrom.  Any  securities  or other  consideration  to be  distributed  to the
Partners  pursuant to the plan shall be  distributed  in the manner set forth in
Article 25(c) as though the Partnership were being liquidated.  For this purpose
only,  the fair market  value of the  securities  or other  consideration  to be
received  pursuant  to the plan shall be treated as  "Profits"  and the  capital
accounts of the Partners  shall be  increased in the manner  provided in Article
12(a)(ii).  No Partner  shall be entitled to any  dissent,  appraisal or similar
rights in connection with a plan contemplated by this Article 17.7.



                                      -17-
<PAGE>

     17.8 Withdrawal of Initial Limited Partner. Upon the date the first Limited
Partner is admitted to the  Partnership  in  accordance  with Article 11 of this
Agreement, the Initial Limited Partner shall withdraw from the Partnership,  and
thereupon  his  Capital  Contribution  shall  be  returned  and his  Partnership
Interest canceled and reallocated to the Limited Partners.

     18. OPTIONAL PURCHASE OF LIMITED PARTNERSHIP INTERESTS ON CERTAIN EVENTS.

     18.1  Death.  Upon the death of a Limited  Partner,  the  deceased  Limited
Partner's  executor,  administrator,  or other legal or personal  representative
shall give  written  notice of that fact to the  General  Partner.  The  General
Partner shall have the option to purchase at the Closing (as defined  below) the
Partnership   Interest  of  the  deceased   Limited  Partner  (whose   executor,
administrator  or other  legal or  personal  representative  shall  then  become
obligated  to sell such  Partnership  Interest) at the price  determined  in the
manner  provided  in  Article 18.7  of  this  Agreement  and  on the  terms  and
conditions provided in Article 18.8 of this Agreement. The General Partner shall
have a period of thirty (30) days  following  the date of notice of the death of
the Limited Partner (the "Option  Period") within which to notify in writing the
deceased Limited  Partner's  executor,  administrator or other legal or personal
representative,  whether the General Partner wishes to purchase all or a portion
of the  Partnership  Interest of the deceased  Limited  Partner.  If the General
Partner  does not elect to  purchase  the  entire  Partnership  Interest  of the
deceased  Limited  Partner before the expiration of the Option Period and in the
manner provided  herein,  the portion of the Partnership  Interest not purchased
shall be held by the deceased Limited Partner's executor, administrator or other
legal  representative  pursuant  to the  terms of this  Agreement.  The  General
Partner, in its sole discretion,  may elect to assign its rights to purchase the
Partnership  Interest of the deceased Limited Partner under this Article 18.1 to
the Partnership and, in such case, the Partnership shall have the same rights as
provided for the General Partner in this Article 18.1.

     18.2  Bankruptcy,  Insolvency or  Assignment  for Benefit of Creditors of a
Limited Partner. In the event that an involuntary or voluntary  proceeding under
the Federal  Bankruptcy  Code,  as amended,  is filed for or against any Limited
Partner,  or if any Limited  Partner shall make an assignment for the benefit of
his creditors,  or if any Limited Partner has a receiver or custodian  appointed
for his assets,  or any Limited  Partner  generally  fails to pay his debts when
due, the insolvent  Limited  Partner  shall give written  notice (the "Notice of
Insolvency") to the General  Partner of the  commencement of any such proceeding
or the  occurrence  of such event within five days of the first notice to him of
such  commencement  or occurrence of such event.  The General Partner shall have
the option to  purchase  at the  Closing  (as  defined  below)  the  Partnership
Interest of the insolvent  Limited Partner (which the insolvent  Limited Partner
or his trustee,  custodian,  receiver or other personal or legal representative,
as the case may be, shall then become obligated to sell) at the price determined
in the manner  provided in  Article 18.7  of this Agreement and on the terms and
conditions provided in Article 18.8 of this Agreement. The General Partner shall
have a period of thirty (30) days following the date of the Notice of Insolvency
(the "Option  Period")  within which to notify in writing the insolvent  Limited
Partner  or his  trustee,  custodian,  receiver,  or  other  legal  or  personal
representative,  whether the General Partner wishes to purchase all or a portion
of


                                      -18-
<PAGE>

the  Partnership  Interest  of the  insolvent  Limited  Partner.  If the General
Partner  does not elect to  purchase  the  entire  Partnership  Interest  of the
insolvent  Limited Partner before the expiration of the Option Period and in the
manner provided  herein,  the portion of the Partnership  Interest not purchased
shall be held by the  insolvent  Partner,  his trustee,  custodian,  receiver or
other legal or personal  representative pursuant to the terms of this Agreement.
The General Partner,  in its sole discretion,  may elect to assign its rights to
purchase the  Partnership  Interest of an insolvent  Limited  Partner under this
Article 18.2 to the Partnership  and, in such case, the  Partnership  shall have
the same rights as provided for the General Partner in this Article 18.2.

     18.3  Breach of  Article  15.3.  In the event the  General  Partner  either
receives a Notice of Withdrawal  as provided in Article 15.3 or receives  notice
of a breach  of  Article  15.3 by or with  respect  to a  Limited  Partner  (the
"Competing  Limited  Partner"),  the  General  Partner  may  elect,  in its sole
discretion,  to treat such event as a default  under this  Agreement and enforce
the  provisions of this Article 18.3. If the General  Partner  elects to enforce
the  provisions  of this Article  18.3,  the General  Partner shall give written
notice of such  election  (the  "Notice of Default")  to the  Competing  Limited
Partner  within 180 days of the date the  General  Partner  first  received  the
Notice of  Withdrawal or notice of the  defaulting  event.  The General  Partner
shall  have the  option to  purchase  at the  Closing  (as  defined  below)  the
Partnership  Interest of the  Competing  Limited  Partner  (which the  Competing
Limited Partner shall then become  obligated to sell) at the price determined in
the manner  provided  in  Article  18.7 of this  Agreement  and on the terms and
conditions provided in Article 18.8 of this Agreement. The General Partner shall
have a period of  thirty  (30) days  following  the date it sends the  Notice of
Default (the "Option  Period")  within which to notify in writing the  Competing
Limited Partner,  whether the Partnership wishes to purchase all or a portion of
the  Partnership  Interest  of the  Competing  Limited  Partner.  If the General
Partner  does not elect to  purchase  the  entire  Partnership  Interest  of the
Competing  Limited Partner before the expiration of the Option Period and in the
manner provided  herein,  the portion of the Partnership  Interest not purchased
shall be held by the  Competing  Limited  Partner  pursuant to the terms of this
Agreement. The General Partner, in its sole discretion,  may elect to assign its
rights to purchase the Partnership Interest of a Competing Limited Partner under
this Article 18.3 to the Partnership  and, in such case, the  Partnership  shall
have the same rights as provided for the General Partner in this Article 18.3.

     18.4 Domestic  Proceeding.  In the event that a spouse of a Limited Partner
commences  against  a  Limited  Partner,  or a  Limited  Partner  is named in, a
Domestic Proceeding,  the Limited Partner shall give written notice (the "Notice
of Domestic  Proceeding") to the General Partner of the commencement of any such
proceeding within five days of the first notice to him of such commencement. The
General  Partner  shall have the option to  purchase  at the Closing (as defined
below) the Partnership  Interest of the Limited Partner involved in the Domestic
Proceeding  (which the Limited Partner shall then become  obligated to sell), at
the price  determined in the manner  provided in Article 18.7 of this  Agreement
and on the terms and conditions provided in Article 18.8 of this Agreement.  The
General  Partner  shall have a period of thirty (30) days  following the date of
the Notice of Domestic  Proceeding (the "Option  Period") within which to notify
in writing the Limited Partner involved in the Domestic Proceeding,  whether the
General Partner wishes to purchase all or a portion of the Partnership  Interest
of such Limited Partner. If the General

  
                                      -19-
<PAGE>

Partner  does not elect to  purchase  the  Partnership  Interest  of the Limited
Partner involved in the Domestic  Proceeding before the expiration of the Option
Period  and in the  manner  provided  herein,  the  portion  of the  Partnership
Interest not  purchased  shall be held by such Limited  Partner  pursuant to the
terms of this Agreement. The General Partner, in its sole discretion,  may elect
to assign its rights to purchase the Partnership Interest of the Limited Partner
involved in the Domestic  Proceeding  under this Article 18.4 to the Partnership
and, in such case,  the  Partnership  shall have the same rights as provided for
the General Partner in this Article 18.4.

     18.5  Divestiture  Option.  If state  or  federal  regulations  or laws are
enacted or applied,  or if any other legal  developments  occur,  which,  in the
opinion  of the  General  Partner  adversely  affect (or  potentially  adversely
affect) the operation of the Partnership  (e.g., the enactment or application of
prohibitory physician  self-referral  legislation against the Partnership or its
Partners),  the General Partner shall promptly  either,  in its sole discretion,
(i) take the steps outlined in this Article 18.5 to divest the Limited  Partners
of their Partnership Interests,  or (ii) dissolve the Partnership as provided in
Article  24.1(e).  If the General Partner chooses option (i), it shall deliver a
written  notice to all of the Limited  Partners (the "Notice of  Election")  and
purchase such Partnership  Interests for its own account.  The purchase price to
be paid for each  Partnership  Interest  shall be  determined  in the  manner as
provided in Article 18.7 and shall be on the terms and conditions as provided in
Article  18.8.  The transfer of the  Partnership  Interests,  the payment of the
purchase price and the  assumption of the Limited  Partners'  obligations  under
their respective  Guaranties (as provided in Article 18.7) shall be made at such
time as  determined  by the General  Partner to be in the best  interests of the
Partnership  and its  Limited  Partners.  Each  Limited  Partner  hereby  makes,
constitutes and appoints the General  Partner,  with full power of substitution,
his true and lawful  attorney-in-fact,  to take such  actions and  execute  such
documents  on his behalf to effect the transfer of his  Partnership  Interest as
provided in this Article  18.5.  The  foregoing  power of attorney  shall not be
affected by the  subsequent  incapacity,  mental  incompetence,  dissolution  or
bankruptcy of any Limited Partner.

     18.6 Default under Guaranties.  Notwithstanding any other provision in this
Article 18 to the contrary,  if any of the events outlined in  Articles 18.1  or
18.2 or any other  defaulting  event  outlined in the Guaranty (the  "Defaulting
Events") should occur with respect to a Limited Partner (the "Defaulting Limited
Partner"), and the General Partner determines (in its sole discretion) that such
event may result in default and  acceleration  of an  obligation  secured by the
Guaranty unless another guarantor acceptable to the Lender can be substituted in
the place of the Defaulting Limited Partner, then the General Partner shall have
the right to  immediately  take the steps as  outlined in this  Article 18.6  to
prevent such default.  Upon the General Partner receiving notice of a Defaulting
Event as provided above,  the General  Partner,  in its sole  discretion,  shall
immediately have the right to either (i) sell the entire Partnership Interest of
the  Defaulting  Limited  Partner  to an  investor  approved  of by the  General
Partner,  (ii) purchase for its own account the entire  Partnership  Interest of
the Defaulting Limited Partner, or (iii) sell the entire Partnership Interest of
the Defaulting Limited Partner to one or more of the other Limited Partners. The
Defaulting  Limited  Partner shall sell his or her  Partnership  Interest to the
purchaser  at the  purchase  price  determined  in the  manner  as  provided  in
Article 18.7 and on the terms and conditions as provided in Article 18.8.


                                      -20-
<PAGE>

The transfer of the Partnership Interest, the payment of the purchase price, and
the assumption of the Defaulting Limited Partner's  obligations under his or her
Guaranty (as provided in Article 18.7), shall be made at such time as determined
by the General  Partner in order to avoid the default  and  acceleration  of the
obligation  secured  by  the  Guaranty.   Each  Limited  Partner  hereby  makes,
constitutes and appoints the General  Partner,  with full power of substitution,
his or her true and lawful  attorney-in-fact,  to take such  actions and execute
such  documents  on his or her  behalf  to  effect  the  transfer  of his or her
Partnership Interest as provided in this Article 18.6, in the event such Limited
Partner becomes a Defaulting Limited Partner.

     18.7  Purchase  Price.  The purchase  price to be paid for the  Partnership
Interest of any Limited  Partner whose interest is being  purchased  pursuant to
the provisions of  Articles 18.1,  18.2,  18.3, 18.4, 18.5 or 18.6 (the "Selling
Limited  Partner")  shall be determined  in the manner  provided in this Article
18.7. The purchase price for a Partnership  Interest  purchased  pursuant to the
provisions  of Article  18.1 shall be an amount  equal to the greater of (i) one
and one-half (1.5) times the aggregate  distributions  made with respect to such
Partnership  Interest  pursuant to Article 14(a) during the twelve-month  period
ending on the Valuation  Date (as defined  below),  or (ii) the Selling  Limited
Partner's  share  of the  Partnership's  book  value  determined  in the  manner
described  below.  The  purchase  price  for a  Partnership  Interest  purchased
pursuant to the provisions of Articles 18.2,  18.3,  18.4, 18.5 or 18.6 shall be
an  amount  equal to the  lesser  of (i) the fair  market  value of the  Selling
Limited  Partner's  Partnership  Interest on the Valuation Date (prorated in the
event that only a portion of his or her Partnership Interest is being purchased)
as  determined  by an  Appraiser  (as  defined  below)  selected  by the General
Partner,  or (ii) the Selling Limited Partner's share of the Partnership's  book
value,  if any  (prorated  in  the  event  that  only  a  portion  of his or her
Partnership  Interest is being purchased) as reflected by the Capital Account of
the Selling  Limited  Partner  (unadjusted  for any  appreciation in Partnership
assets and as reduced by depreciation  deductions claimed by the Partnership for
tax purposes) as of the Valuation Date (as defined below).  The General Partner,
in its sole  discretion,  may pursue  both of the above  valuation  methods  and
choose the lesser  value of the two as indicated  above,  or may  designate  and
follow only one of the methods in calculating the purchase  price.  For purposes
of this Article 18.7, the term "Appraiser"  shall mean an independent  appraiser
who is qualified in  appraising  limited  partnership  interests  and who has at
least five years  experience.  In determining  fair market value,  the Appraiser
shall take into consideration any outstanding indebtedness,  liabilities,  liens
and obligations of the Partnership  and the relative  Partnership  Interests and
capital  accounts of all Partners,  as well as applying any customary  discounts
for  lack of  liquidity  and  control.  Such  appraisal  shall be  conducted  in
accordance with professional appraisal standards. The valuation of the Appraiser
shall be  conclusive  and binding upon the  Partnership,  the  purchaser and the
Selling Limited Partner and his or her representatives. The determination of the
Selling Limited Partner's Capital Account or aggregate  distributable  amount on
the  Valuation  Date  (as  defined  below)  shall  be made by the  Partnership's
internal  accountant  (the  "Partnership  Accountant")  upon  a  review  of  the
Partnership  books of  account,  and a formal  audit is  expressly  waived.  The
statement of the  Partnership  Accountant with respect to the Capital Account or
aggregate  distributable  amount of the Selling Limited Partner on the Valuation
Date shall be binding and conclusive upon the Partnership, the purchaser and the
Selling Limited Partner and his or her representatives. The Valuation Date means
the last day of the


                                      -21-
<PAGE>

month  immediately  preceding  the  month in which  occurs:  (i) the  death of a
Selling Limited Partner,  in the case of a purchase by reason of death; (ii) the
bankruptcy or insolvency of a Selling Limited Partner, in the case of a purchase
by reason of such  bankruptcy or  insolvency;  (iii) the Notice of Withdrawal or
breach of Article  15.3 as provided in Article 18.3 in the case of a purchase by
reason thereof; (iv) the commencement of the Domestic Proceeding, in the case of
a purchase by reason thereof;  (v) the Notice of Election as provided in Article
18.5,  in the case of a  purchase  by  reason  thereof;  or (vi) the  notice  of
Defaulting  Event  as  provided  in  Article  18.6,  in the  case of a  purchase
occurring by reason of one of such events. Any Limited Partner whose Partnership
Interest is purchased  pursuant to the provisions of  Article 18.1,  18.2, 18.3,
18.4,  18.5 or 18.6 shall be entitled only to the purchase  price which shall be
paid at the Closing in cash (or by certified  or cashier's  check) and shall not
be entitled to any Partnership  distributions  made after the Valuation Date. If
as of the  date  of  the  Closing  the  Selling  Limited  Partner  still  has an
outstanding  personal  obligation  under the Guaranty  (the  "Obligation"),  the
purchaser  shall assume the portion of the Obligation as is equal to the portion
of the  Partnership  Interest  being  purchased,  indemnify the Selling  Limited
Partner  from  such  portion  of the  Obligation,  and take  such  steps  deemed
necessary by the General  Partner to formally  evidence the  assumption  of such
portion  of  the  Obligation,   including  without  limitation,  executing  such
documents and providing such  financial  information to the Bank to evidence the
assumption  of such  portion  of the  Obligation,  and obtain if  possible,  the
release of the Selling Limited Partner from such portion of the Obligation.  The
transfer of a Partnership  Interest of a Selling Limited Partner shall be deemed
to occur as of the Valuation Date and the Selling  Limited Partner shall have no
voting or other rights as a Limited Partner after such date. The purchaser shall
be entitled to any distributions  attributable to the transferred interest after
the Valuation Date and the Partnership shall have the right to deduct the amount
of any  such  distributions  made  to the  Selling  Limited  Partner  after  the
Valuation  Date  from  the  purchase  price.   Notwithstanding  the  above,  the
Partnership shall not be obligated to assume any outstanding personal obligation
of a Selling Limited Partner.


     18.8 Closing.

     18.8.1  Closing of Purchase and Sale.  The Closing of any purchase and sale
of a Partnership  Interest pursuant to Article 18.1, 18.2, 18.3, 18.4 or 18.5 of
this Agreement shall take place at the principal office of the  Partnership,  or
such other place  designated by the General  Partner,  on the date determined as
follows (the "Closing"):

     (a) In the case of a purchase and sale  occurring by reason of the death of
a Limited  Partner as provided in Article  18.1 of this  Agreement,  the Closing
shall be held on the thirtieth  day (or if such  thirtieth day is not a business
day, the next business day following the thirtieth  day) next following the last
to occur of:

     (i) Qualification of the executor or personal administrator of the deceased
Limited Partner's estate;


                                      -22-
<PAGE>

     (ii) The date on which any necessary determination of the purchase price of
the Partnership Interest to be purchased has been made; or

     (iii) The date that coincides with the close of the Option Period.

     (b) In  the  case  of a  purchase  and  sale  occurring  by  reason  of the
occurrence of one of the events described in Article 18.2, 18.3, 18.4 or 18.5 of
this  Agreement,  the  Closing  shall be held on the  thirtieth  day (or if such
thirtieth  day is not a  business  day,  the next  business  day  following  the
thirtieth day) next following the later to occur of:

     (i) The date on which any necessary  determination of the purchase price of
the Partnership Interest to be purchased has been made; or

     (ii) The date that coincides with the close of the Option Period.

     At the Closing,  although not necessary to effect the transfer, the Selling
Limited  Partner shall  concurrently  with tender and receipt of the  applicable
purchase price,  deliver to the purchaser duly executed  instruments of transfer
and assignment,  assigning good and marketable  title to the portion or portions
of the Selling Limited  Partner's  entire  Partnership  Interest thus purchased,
free and clear from any liens or encumbrances  or rights of others therein.  The
parties acknowledge that occurrence of any of the triggering events described in
Article  18.1,  18.2,  18.3,  18.4,  18.5 or 18.6  and  compliance  with all the
Articles of this  Agreement,  except the execution of the transfer  documents by
the  Selling  Limited  Partner as  provided  above in this  Article 18.8.1,  are
sufficient  to effect the  complete  transfer of the Selling  Limited  Partner's
Partnership  Interest and the Selling Limited Partner shall be deemed to consent
to admission of the transferee as a substitute Limited Partner.  Notwithstanding
the date of the Closing or whether a Closing is successfully  held, the transfer
of a Partnership  Interest of a Selling Limited Partner shall be deemed to occur
as of the  Valuation  Date as defined in Article  18.7.  The deemed  transfer is
effective  regardless of whether the Selling Limited Partner performs the duties
set forth in this Article 18.8.1.

     18.8.2 Terms and  Conditions  of Purchase.  The  Partnership  Interest of a
Limited Partner shall not be transferred to any Partner unless the  requirements
of Articles 17.2 and 17.4 (b) through (f) are satisfied  with respect to it. The
purchaser shall be liable for all  obligations  and  liabilities  connected with
that portion of the  Partnership  Interest  transferred  to it unless  otherwise
agreed in writing.


                                      -23-
<PAGE>

     19. SALE, ASSIGNMENT OR OTHER TRANSFER OF THE GENERAL PARTNER'S INTEREST.

     19.1 The General Partner may not mortgage, pledge,  hypothecate,  transfer,
sell,  assign or  otherwise  dispose of all or any part of its  interest  in the
Partnership,  whether  voluntarily,  by  operation  of  law  or  otherwise  (the
foregoing  actions being  hereafter  collectively  referred to as "Transfers" or
singularly as a "Transfer") except as permitted by this Article.

     19.2 If the General Partner makes a Transfer (other than a mortgage, pledge
or hypothecation) of its general partner interest in the Partnership pursuant to
this Article, it shall be liable for all obligations and liabilities incurred by
it as the general  partner of the Partnership on or before the effective date of
such Transfer, but shall not be liable for any obligations or liabilities of the
Partnership arising after the effective date of the Transfer.

     19.3 No Transfer by the General Partner shall be permitted unless:

     (a) Counsel for the Partnership shall have rendered an opinion that none of
the actions taken in connection with such Transfer will cause the Partnership to
be  classified  other than as a partnership  for federal  income tax purposes or
will cause the  termination or dissolution of the  Partnership  under state law;
and

     (b) Such documents or  instruments,  in form and substance  satisfactory to
counsel for the  Partnership,  shall have been  executed and delivered as may be
required in the opinion of counsel for the  Partnership to effect fully any such
Transfer.

     Notwithstanding the foregoing  provisions of this Article 19.3, the General
Partner  may pledge  its  interest  in the  Partnership  to any bank,  insurance
company or other financial institution to secure payment of indebtedness.

     20. TERMINATION OF THE SERVICES OF THE GENERAL PARTNER.

     If the General  Partner  shall be finally  adjudged by a court of competent
jurisdiction to be liable to the Limited Partners or the Partnership for any act
of gross negligence or willful misconduct in the performance of its duties under
the terms of this  Agreement,  the  General  Partner  may be removed and another
substituted with the consent of all of the Limited Partners.  Such consent shall
be evidenced by a certificate of removal signed by all of the Limited  Partners.
In the event of removal,  the new general  partner  shall  succeed to all of the
powers,  privileges  and  obligations  of the General  Partner,  and the General
Partner's  interest in the Partnership  shall become that of a Limited  Partner,
and the General  Partner  shall  maintain  its same  Percentage  Interest in the
Partnership  notwithstanding  anything contained in the Act to the contrary.  In
addition,  in the event of removal, the new general partner shall take all steps
necessary and appropriate to prepare and


                                      -24-
<PAGE>


record an amendment to the  Certificate  of Limited  Partnership  to reflect the
removal of the General Partner and the admission of such new general partner.

     21. MANAGEMENT AND OPERATION OF BUSINESS.

     21.1 All  decisions  with  respect to the  management  of the  business and
affairs of the Partnership shall be made by the General Partner.

     21.2 The General  Partner  shall be under no duty to devote all of its time
to the business of the Partnership,  but shall devote only such time as it deems
necessary  to conduct  the  Partnership  business  and to operate and manage the
Partnership in an efficient manner.

     21.3 The General  Partner may charge to the  Partnership  all  ordinary and
necessary  costs  and  expenses,  direct  and  indirect,   attributable  to  the
activities, conduct and management of the business of the Partnership. The costs
and expenses to be borne by the Partnership  shall include,  but are not limited
to, all expenditures  incurred in acquiring and financing the Equipment or other
Partnership  property,  legal and  accounting  fees and  expenses,  salaries  of
employees of the  Partnership,  consulting  and quality  assurance  fees paid to
independent contractors, insurance premiums and interest.

     21.4 In  addition  to,  and not in  limitation  of,  any  rights and powers
covenanted by law or other provisions of this Agreement,  and except as limited,
restricted  or  prohibited  by the express  provisions  of this  Agreement,  the
General  Partner  shall have and may exercise on behalf of the  Partnership  all
powers and rights necessary,  proper,  convenient or advisable to effectuate and
carry out the purposes, business and objectives of the Partnership.  Such powers
shall include, without limitation, the following:

     (a) To conduct  the  Offering  and any  Dilution  Offering on behalf of the
Partnership;

     (b) To acquire on behalf of the  Partnership  (i) one or more fixed base or
transportable  lithotripsy systems,  including the Lithotripter System, (ii) any
other assets  related to the  provision of  lithotripsy  services,  or (iii) any
other assets or equipment or an interest in another entity  consistent  with the
purposes  of the  Partnership  as  provided  in  Article  4  (collectively,  the
"Additional  Assets"),  at such times and at such price and upon such terms,  as
the General Partner deems to be in the best interest of the Partnership;

     (c) To purchase,  hold, manage,  lease,  license and dispose of Partnership
assets,  including the purchase,  exchange,  trade or sale of the  Partnership's
assets at such price, or amount, for cash, securities or other property and upon
such  terms,  as the  General  Partner  deems to be in the best  interest of the
Partnership; provided, that should the Partnership assets be exchanged or traded
for securities or other property


                                      -25-
<PAGE>

(the "Replacement Property") the General Partner shall have the same powers with
regard to the Replacement Property as it does towards the traded property;

     (d) To exercise  the option of the General  Partner or the  Partnership  to
purchase a Limited Partner's Partnership Interest pursuant to Article 18;

     (e)  To  determine  the  travel   itinerary  and  site  locations  for  the
Lithotripter System or other Partnership technology;

     (f) To borrow money for any Partnership  purpose (including the acquisition
of the Additional Assets) and, if security is required  therefor,  to subject to
any security device any portion of the property for the  Partnership,  to obtain
replacements  of any other  security  device,  to  prepay,  in whole or in part,
refinance,  increase,  modify,  consolidate  or extend any  encumbrance or other
security device;

     (g) To deposit,  withdraw, invest, pay, retain (including the establishment
of reserves  in order to acquire  the  Additional  Assets)  and  distribute  the
Partnership's  funds  in any  manner  consistent  with  the  provisions  of this
Agreement;

     (h) To institute and defend actions at law or in equity;

     (i) To enter into and carry out  contracts  and  agreements  and any or all
documents and  instruments  and to do any and all such other things as may be in
furtherance of  Partnership  purposes or necessary or appropriate to the conduct
of the Partnership activities;

     (j) To execute,  acknowledge and deliver any and all instruments  which may
be deemed necessary or convenient to effect the foregoing;

     (k) To engage or retain  one or more  persons  to  perform  acts or provide
materials as may be required by the Partnership,  at the Partnership's  expense,
and to  compensate  such  person or persons  at a rate to be set by the  General
Partner,  provided that the  compensation is at the then prevailing rate for the
type of services and materials provided, or both. Any person, whether a Partner,
an Affiliate of a Partner or otherwise, including without limitation the General
Partner,  may be employed or engaged by the  Partnership to render  services and
provide  materials,   including,   but  not  limited  to,  management  services,
professional services,  accounting services,  quality assessment services, legal
services, marketing services,  maintenance services or provide materials; and if
such person is a Partner or an Affiliate  of a Partner,  (s)he shall be entitled
to, and shall be paid  compensation for said services or materials,  anything in
this Agreement to the contrary  notwithstanding,  provided that the compensation
to be received for such services or materials is  competitive in price and terms
with then prevailing rate for the type of services and/or materials provided.


                                      -26-
<PAGE>

The Partnership,  pursuant to the terms of a Management Agreement, will contract
with the General Partner with respect to the supervision and coordination of the
management and administration of the day-to-day  operations of the Partnership's
business for a monthly fee equal to 7.5% of net Partnership Cash Flow per month.
All costs incurred by the General  Partner under the Management  Agreement shall
be paid or reimbursed by the  Partnership  directly.  The  Partnership  may also
contract with healthcare  facilities and/or qualified physicians desiring to use
its Lithotripter System for the treatment of patients. Owning an interest in the
Partnership  shall not be a  condition  to using the  Lithotripter  System.  The
General Partner and its Affiliates may engage in or possess an interest in other
business  ventures of any nature and description  independently  or with others,
including,  but  not  limited  to,  the  operation  of a  fixed-base  or  mobile
lithotripsy  unit,  whether  or not such  business  ventures  are in  direct  or
indirect  competition with the Partnership,  and neither the Partnership nor the
Partners  shall  have  any  right by  virtue  of this  Agreement  in and to said
independent ventures or to the income or profits derived therefrom.

     21.5 In addition to other acts  expressly  prohibited or restricted by this
Agreement  or by law,  the General  Partner  shall have no  authority  to act on
behalf of the Partnership in:

     (a) Doing any act in contravention  of this Agreement or the  Partnership's
Certificate of Limited Partnership;

     (b) Doing any act which would make it  impossible  to carry on the ordinary
business of the Partnership;

     (c) Possessing or in any manner dealing with the Partnership's  property or
assigning the rights of the Partnership in the Partnership's  property for other
than Partnership purposes;

     (d) Admitting a person as a Limited  Partner or a General Partner except as
provided in this Agreement; or

     (e) Performing any act (other than an act required by this Agreement or any
act taken in good faith  reliance upon counsel's  opinion)  which would,  at the
time such act  occurred,  subject any Limited  Partner to liability as a general
partner in any jurisdiction.
 


                                      -27-
<PAGE>

     22. RESERVES.

     The General  Partner may cause the  Partnership to create a reserve account
to be used exclusively for repairs and acquisition of Additional  Assets and for
any other valid  Partnership  purpose.  The General  Partner shall,  in its sole
discretion, determine the amount of payments to such reserve.

     23. INDEMNIFICATION AND EXCULPATION OF THE GENERAL PARTNER.

     23.1 The General  Partner is accountable to the  Partnership as a fiduciary
and consequently must exercise good faith and integrity in handling  Partnership
affairs.  The General Partner and its Affiliates  shall have no liability to the
Partnership which arises out of any action or inaction of the General Partner or
its  Affiliates  if the  General  Partner  or its  Affiliates,  in  good  faith,
determined  that  such  course  of  conduct  was in  the  best  interest  of the
Partnership  and such course of conduct did not constitute  gross  negligence or
willful misconduct of the General Partner or its Affiliates. The General Partner
and its Affiliates  shall be indemnified by the Partnership  against any losses,
judgments,  liabilities,  expenses and amounts paid in  settlement of any claims
sustained by them in  connection  with the  Partnership,  provided that the same
were not the result of gross negligence or willful misconduct on the part of the
General Partner or its Affiliates.

     23.2 The General  Partner shall not be liable for the return of the Capital
Contributions of the Limited Partners,  and upon  dissolution,  Limited Partners
shall look solely to the assets of the Partnership.

     24. DISSOLUTION OF THE PARTNERSHIP.

     24.1 The  Partnership  shall be dissolved and  terminated  and its business
wound up upon the occurrence of any one of the following events:

     (a) The expiration of its term on December 31, 2048;

     (b) The  filing by, on behalf of, or  against  the  General  Partner of any
petition or pleading,  voluntary or involuntary,  to declare the General Partner
bankrupt under any bankruptcy  law or act, or the  commencement  in any court of
any  proceeding,  voluntary  or  involuntary,  to declare  the  General  Partner
insolvent  or  unable  to pay its  debts,  or the  appointment  by any  court or
supervisory authority of a receiver, trustee or other custodian of the property,
assets or business of the General  Partner or the assignment by it of all or any
part of its  property or assets for the benefit of  creditors,  if said  action,
proceeding or  appointment  is not  dismissed,  vacated or otherwise  terminated
within ninety (90) days of its commencement;



                                      -28-
<PAGE>

     (c) The determination of the General Partner that the Partnership should be
dissolved;

     (d) The occurrence of an event  described in a plan approved by the General
Partner   pursuant  to  Article  17.7  resulting  in  the   dissolution  of  the
Partnership;

     (e) The  election  of the  General  Partner  to  dissolve  the  Partnership
following the occurrence of an event described in Article 18.5;

     (f)  Except as  otherwise  provided  in any plan  approved  by the  General
Partner pursuant to Article 17.7, the sale, exchange or other disposition of all
or substantially all of the property of the Partnership without making provision
for the replacement thereof; and

     (g) The dissolution,  retirement,  resignation,  death, disability or legal
incapacity  of  a  general  partner,  and  any  other  event  resulting  in  the
dissolution  or termination  of the  Partnership  under the laws of the State of
Wyoming;  provided,  that the events described in Sections 17-14-901(iv) and (v)
of the Act or any similar provisions of any successor statute,  shall not work a
dissolution of the Partnership except as expressly provided in (b) above.

     24.2  Notwithstanding the provisions of Article 24.1, the Partnership shall
not be dissolved and terminated  upon the retirement,  resignation,  bankruptcy,
assignment for the benefit of creditors, dissolution, death, disability or legal
incapacity of a general partner, and its business shall continue pursuant to the
terms and  conditions  of this  Agreement,  if any  general  partner  or general
partners  remain  following  such event;  provided that such  remaining  general
partner or general partners are hereby obligated to continue the business of the
Partnership.  If no general  partner remains after the occurrence of such event,
the  business  of the  Partnership  shall  continue  pursuant  to the  terms and
conditions of this  Agreement,  if, within ninety (90) days after the occurrence
of such event,  a Majority in Interest of the Limited  Partners agree in writing
to  continue  the  business  of  the  Partnership,  and,  if  necessary,  to the
appointment  of one or more persons or entities to be substituted as the general
partner.  In the event the Limited  Partners agree as provided above to continue
the business of the  Partnership,  the new general  partner or general  partners
shall succeed to all of the powers,  privileges  and  obligations of the General
Partner,  and the General  Partner's  interest in the Partnership shall become a
Limited  Partner's  interest  hereunder.  Furthermore,  in the event a remaining
general partner or the Limited  Partners,  as the case may be, agree to continue
the  business of the  Partnership  as provided  herein,  the  remaining  general
partner or the newly appointed general partner or general partners,  as the case
may be, shall take all steps  necessary and appropriate to prepare and record an
amendment to the Certificate of Limited  Partnership to reflect the continuation
of the business of the Partnership and the admission of a new general partner or
general partners, if any.



                                      -29-
<PAGE>

     25. DISTRIBUTION UPON DISSOLUTION.

     Upon the  dissolution  and  termination  of the  Partnership,  the  General
Partner or, if there is none, a representative  of the Limited  Partners,  shall
cause the cancellation of the Partnership's  Certificate of Limited Partnership,
shall  liquidate the assets of the  Partnership,  and shall apply and distribute
the proceeds of such liquidation in the following order of priority:

     (a) First, to the payment of the debts and liabilities of the  Partnership,
and the expenses of liquidation;

     (b) Second,  to the creation of any reserves which the General  Partner (or
such  representatives of the Limited Partners) may deem reasonably necessary for
the payment of any  contingent or unforeseen  liabilities  or obligations of the
Partnership or of the General  Partner  arising out of or in connection with the
business and operation of the Partnership; and

     (c) Third,  the balance,  if any,  shall be  distributed to the Partners in
accordance  with the Partners'  positive  Capital  Account  balances  after such
Capital  Accounts  are  adjusted  as  provided  by  Article 13,  and  any  other
adjustments  required by the Final Treasury  Regulations under Section 704(b) of
the Code.  Any general  partner with a negative  Capital  Account  following the
distribution  of  liquidation  proceeds or the  liquidation of its interest must
contribute to the  Partnership an amount equal to such negative  Capital Account
on or before the end of the  Partnership's  taxable  year (or, if later,  within
ninety days after the date of liquidation).  Any capital so contributed shall be
(i)  distributed  to those  Partners with positive  Capital  Accounts until such
Capital  Accounts are reduced to zero,  and/or (ii) used to  discharge  recourse
liabilities.

     26. BOOKS OF ACCOUNT, RECORDS AND REPORTS.

     26.1 Proper and complete  records and books of account shall be kept by the
General Partner in which shall be entered fully and accurately all  transactions
and such other  matters  relating to the  Partnership's  business as are usually
entered  into  records  and books of account  maintained  by persons  engaged in
businesses of a like character.  The books and records of the Partnership  shall
be  prepared  according  to the  accounting  method  determined  by the  General
Partner. The Partnership's fiscal year shall be the calendar year. The books and
records shall at all times be maintained at the Partnership's Records Office and
shall be open to the reasonable  inspection  and  examination of the Partners or
their duly authorized representatives during reasonable business hours.

     26.2  Within  ninety  (90) days  after the end of each  Year,  the  General
Partner  shall send to each person who was a Limited  Partner at any time during
such year such tax  information,  including,  without  limitation,  Federal  tax
Schedule K-1, as shall be reasonably necessary for the


                                      -30-
<PAGE>

preparation by such person of his federal income tax return. The General Partner
will also make available to the Limited Partners any other information  required
by the Act.

     26.3 The General Partner shall maintain at the Partnership's Records Office
copies of the Partnership's  original Certificate of Limited Partnership and any
certificate of amendment,  restated  certificate or certificate of  cancellation
with  respect  thereto and such other  documents as the Act shall  require.  The
General Partner will furnish to any Limited Partner upon request or as otherwise
required  by law a copy of the  Partnership's  original  Certificate  of Limited
Partnership  and  any  certificate  of  amendment,   restated  certificate,   or
certificate of cancellation, if any.

     26.4  The  General  Partner  shall,  in its sole  discretion,  make for the
Partnership  any and all  elections  for  federal,  state and local tax purposes
including,  without limitation, any election, if permitted by applicable law, to
adjust the basis of the  Partnership's  property  pursuant to Code Sections 754,
734(b) and 743(b), or comparable provisions of state or local law, in connection
with transfers of interests in the Partnership and Partnership Distributions.

     26.5 The  General  Partner is  designated  as the Tax  Matters  Partner (as
defined in Section  6231 of the Code) and to act in any similar  capacity  under
state or local law, and is authorized  (at the  Partnership's  expense):  (i) to
represent the Partnership  and Partners  before taxing  authorities or courts of
competent  jurisdiction in tax matters  affecting the Partnership or Partners in
their  capacity  as  Partners;  (ii) to extend the  statute of  limitations  for
assessment of tax  deficiencies  against Partners with respect to adjustments to
the  Partnership's  federal,  state or local tax  returns;  (iii) to execute any
agreements  or other  documents  relating  to or  affecting  such  tax  matters,
including  agreements or other  documents that bind the Partners with respect to
such tax matters or otherwise affect the rights of the Partnership and Partners;
and (iv) to  expend  Partnership  funds  for  professional  services  and  costs
associated  therewith.  The General Partner is authorized and required to notify
the federal,  state or local tax authorities of the appointment of a Tax Matters
Partner in the manner provided in Treasury Regulations Section 301.6231(a)(7)-1,
as modified  from time to time.  In its  capacity as Tax  Matters  Partner,  the
General Partner shall oversee the Partnership's tax affairs in the manner which,
in its best judgment, is in the interests of the Partners.

     27. NOTICES.

     All notices under this Agreement shall be in writing and shall be deemed to
have been given when delivered personally,  or mailed by certified or registered
mail, postage prepaid, return receipt requested.  Notices to the General Partner
shall be  delivered  at, or mailed  to,  its  principal  office.  Notices to the
Partnership  shall be delivered  at, or mailed to, its  principal  office with a
copy to each of its  business  offices.  Notice  to a Limited  Partner  shall be
delivered to such Limited  Partner,  or mailed to the last address  furnished by
him for such purposes to the General Partner. Limited Partners shall give notice
of a change of address to the  General  Partner in the manner  provided  in this
Article.



                                      -31-
<PAGE>

     28. AMENDMENTS.

     Subject to the  provisions  of Article  28,  this  Agreement  is subject to
amendment  only by written  consent of the  General  Partner  and a Majority  in
Interest of the Limited Partners;  provided, however, the consent of the Limited
Partners shall not be required if such  amendments are ministerial in nature and
do not  contravene  the provisions of Article 29.  Further,  no Limited  Partner
consent  shall be  required  to amend  Schedule A to reflect  the  admission  of
Partners as contemplated by the Offering,  any Dilution Offering or as otherwise
herein permitted.

     29. LIMITATIONS ON AMENDMENTS.

     Notwithstanding  the  provisions  of  Article  28,  no  amendment  to  this
Agreement shall:

     (a) Enlarge the  obligations of any Partner under this Agreement or convert
the interest in the  Partnership  of any Limited  Partner into the interest of a
general partner or modify the limited liability of any Limited Partner,  without
the consent of such Partner;

     (b) Amend the  provisions  of Article 13, 14, 16 or 25 without the approval
of the General  Partner  and a Majority  in  Interest  of the Limited  Partners;
provided,  however, that the General Partner may at any time amend such Articles
without the consent of the Limited  Partners in order to permit the  Partnership
allocations  to be sustained for federal  income tax purposes,  but only if such
amendments do not materially  affect adversely the rights and obligations of the
Limited Partners,  in which case such amendments may only be made as provided in
this Article 29(b); or

     (c) Amend this Article 29 without the consent of all Partners.

     30. MEETINGS, CONSENTS AND VOTING.

     30.1 A meeting of the  Partnership  to consider  any matter with respect to
which the Partners may vote as set forth in this  Agreement may be called by the
General Partner or by Limited  Partners who hold more than  twenty-five  percent
(25%) of the  aggregate  interests  in the  Partnership  held by all the Limited
Partners.  Upon  receipt of a notice  requesting  a meeting  by such  Partner or
Partners  and stating the purpose of the  meeting,  the General  Partner  shall,
within ten (10) days thereafter, give notice to the Partners of a meeting of the
Partnership to be held at a time and place  generally  convenient to the Limited
Partners  on a date not  earlier  than  fifteen  (15) days after  receipt by the
General  Partner of the notice  requesting a meeting.  The notice of the meeting
shall set forth the time, date, location and purpose of the meeting.

     30.2 Any consent of a Partner  required by this  Agreement  may be given as
follows:



                                      -32-
<PAGE>

     (a) By a written  consent given by the  consenting  Partner and received by
the  General  Partner at or prior to the doing of the act or thing for which the
consent is solicited, or

     (b) By the affirmative  vote by the consenting  Partner to the doing of the
act or thing for which the consent is solicited at any meeting  called  pursuant
to this Article to consider the doing of such act or thing.

     30.3 When exercising  voting rights expressly granted under the Articles of
this Agreement,  each Partner shall have that number of votes as is equal to the
Percentage Interest of such Partner at the time of the vote, multiplied by 100.

     31. SUBMISSIONS TO THE LIMITED PARTNERS.

     The General Partner shall give the Limited  Partners notice of any proposal
or other  matter  required by any  provision  of this  Agreement or by law to be
submitted for consideration  and approval of the Limited  Partners.  Such notice
shall include any information required by the relevant provision or by law.

     32. ADDITIONAL DOCUMENTS.

     Each party  hereto  agrees to execute and  acknowledge  all  documents  and
writings  which the  General  Partner may deem  necessary  or  expedient  in the
creation of this Partnership and the achievement of its purpose.

     33. SURVIVAL OF RIGHTS.

     Except as herein otherwise  provided to the contrary,  this Agreement shall
be binding upon and inure to the benefit of the parties hereto,  their successor
and assigns.

     34. INTERPRETATION AND GOVERNING LAW.

     When the context in which words are used in this  Agreement  indicates that
such is the intent,  words in the singular  number shall  include the plural and
vise versa;  in addition,  the  masculine  gender shall include the feminine and
neuter  counterparts.  The Article  headings or titles and the table of contents
shall not define,  limit, extend or interpret the scope of this Agreement or any
particular Article. This Agreement shall be governed and construed in accordance
with the laws of the State of Wyoming  without giving effect to the conflicts of
laws provisions thereof.

     35. SEVERABILITY.

     If any  provision,  sentence,  phrase  or  word of  this  Agreement  or the
application  thereof to any person or  circumstance  shall be held invalid,  the
remainder of this Agreement, or the

                                      -33-
<PAGE>

application  of  such  provision,  sentence,  phrase,  or  word  to  persons  or
circumstances,  other  than those as to which it is held  invalid,  shall not be
affected thereby.

     36. AGREEMENT IN COUNTERPARTS.

     This Agreement may be executed in several counterparts, each of which shall
be  deemed  an  original,  but all of which  shall  constitute  one and the same
instrument. In addition, this Agreement may contain more than one counterpart of
the  signature  page and this  Agreement  may be executed by the affixing of the
signatures of each of the Partners to one of such  counterpart  signature pages;
all of such signature pages shall be read as though one, and they shall have the
same force and effect as though all of the signers had signed a single signature
page.

     37. THIRD PARTIES.

     The agreements,  covenants and representations contained herein are for the
benefit of the parties hereto  inter se and are not for the benefit of any third
parties including, without limitation, any creditors of the Partnership.

     38. POWER OF ATTORNEY.

     Each Limited  Partner hereby makes,  constitutes  and appoints Stan Johnson
and Cheryl Williams,  severally,  with full power of substitution,  his true and
lawful  attorneys-in-fact,  for him and in his name, place and stead and for his
use and benefit to sign and acknowledge,  file and record, any amendments hereto
among the Partners for the further  purpose of executing and filing on behalf of
each Limited Partner,  any and all certificates of limited  partnership or other
documents  necessary to constitute the Partnership or to effect the continuation
of the  Partnership,  the  admission  or  withdrawal  of a general  partner or a
limited partner,  the qualification of the Partnership in a foreign jurisdiction
(or  amendment  to such  qualification),  the  admission of  substitute  Limited
Partners or the  dissolution or termination  of the  Partnership,  provided such
continuation,   admission,   withdrawal,   qualification,   or  dissolution  and
termination are in accordance with the terms of this Agreement.

     The foregoing power of attorney is a special power of attorney coupled with
an interest,  is irrevocable and shall survive the death or legal  incapacity of
each  Limited  Partner.  It may be  exercised  by any one of said  attorneys  by
listing all of the Limited Partners  executing any instrument over the signature
of the  attorney-in-fact  acting for all of them.  The power of  attorney  shall
survive the delivery of an assignment  by a Limited  Partner of the whole or any
portion of his Unit.  In those cases in which the assignee of, or the  successor
to, a  Limited  Partner  owning a Unit has been  approved  by the  Partners  for
admission to the  Partnership  as a  substitute  Limited  Partner,  the power of
attorney  shall survive for the sole purpose of enabling the General  Partner to
execute,   acknowledge  and  file  any  instrument   necessary  to  effect  such
substitution.



                                      -34-
<PAGE>

     This power of attorney shall not be affected by the subsequent  bankruptcy,
dissolution, incapacity or mental incompetence of any Limited Partner.

     39. ARBITRATION.

     Any dispute  arising out of or in  connection  with this  Agreement  or the
breach thereof shall be decided by  arbitration  in Austin,  Texas in accordance
with the then effective commercial arbitration rules of the American Arbitration
Association,   and  judgment   thereof  may  be  entered  in  any  court  having
jurisdiction thereof.

     40. CREDITORS.

     None of the  provisions  of this  Agreement  shall be for the benefit of or
enforceable by any creditors of the Partnership.

     IN WITNESS  WHEREOF,  the parties have executed  this  Agreement of Limited
Partnership as of the day and year first above written.

                                      GENERAL PARTNER:

                                      SUN MEDICAL TECHNOLOGIES, INC., 
                                        a California corporation


                                      By: _________________________________
                                          Stan Johnson, President

ATTEST:

_________________________                                      [CORPORATE SEAL]
Secretary


                                            INITIAL LIMITED PARTNER:


                                            __________________________________
                                            Stan Johnson




                                      -35-
<PAGE>

STATE OF ____________________)
                                            )
COUNTY OF __________________                         )

     On this _______ day of ___________, 1998, before me, the undersigned Notary
Public in and for the  County of  _______________  in the State of  ___________,
personally  came Stan  Johnson,  who,  being by me duly  sworn,  said that he is
President of Sun Medical Technologies, Inc., the sole general partner of Wyoming
Urological Services Limited Partnership,  that the seal affixed to the foregoing
instrument in writing is the corporate  seal of the  corporation,  and that said
writing was signed, sworn to, and sealed by him in behalf of said corporation by
its authority duly given. And the said Stan Johnson,  further certified that the
facts set forth in said  writing are true and  correct,  and  acknowledged  said
instrument to be the act and deed of said corporation.

                  WITNESS my hand and notarial seal.


                                    ------------------------------------------

                                    Notary Public
My commission expires:

___________________________

STATE OF ________________                   )
                                            )
COUNTY OF ______________                    )


     I,  _______________________________,  a notary  public in and for the State
and County set forth  above,  do hereby  certify  that Stan  Johnson  personally
appeared before me this _____ day of _________,  1998 and acknowledged and swore
to the due  execution  of the  foregoing  Limited  Partnership  Agreement in his
capacity as the initial limited partner.




                                    -----------------------------------------

                                    Notary Public

My commission expires:

___________________________





                                      -36-
<PAGE>

                           COUNTERPART SIGNATURE PAGE


     By signing this  Counterpart  Signature Page, the undersigned  acknowledges
his or her  acceptance  of that  certain  Agreement  of Limited  Partnership  of
Wyoming Urological Services Limited Partnership,  and his or her intention to be
legally bound thereby.

                  Dated this _________ day of ___________________, 199__.



                                    -------------------------------------------

                                    Signature



                                    -------------------------------------------

                                    Printed Name




STATE OF _______________                    )
                                            )
COUNTY OF _____________                     )


     BEFORE ME, the  undersigned  Notary  Public in and for the State and County
set forth above,  on the _______ day of  __________________,  199__,  personally
appeared  ___________________,  and,  being by me first duly sworn,  stated that
(s)he signed this Counterpart Signature Page for the purpose set forth above and
that the statements contained therein are true.




                                    -------------------------------------------

                                    Signature of Notary Public


                                    -------------------------------------------

                                    Printed Name of Notary

My Commission Expires:

___________________________
[SEAL]


                                      -37-
<PAGE>



 


                                   SCHEDULE A

                        Schedule of Partnership Interests

                 WYOMING UROLOGICAL SERVICES LIMITED PARTNERSHIP

           CONTRIBUTIONS OF CAPITAL TO THE PARTNERSHIP AND PERCENTAGE
                                    INTERESTS

 


                                  Cash                               Percentage
                              Contribution     Guaranty(1)            Interest
General Partner
Sun Medical Technologies, Inc.   $50,000         $47,700                20%
1301 Capital of Texas Highway
Suite C-300
Austin, Texas  78746
Limited Partners as a whole     $200,000        $190,800                80%  

       TOTAL:                   $250,000         $238,500                100%


     (1)  Represents   the  principal   portion  of  each   Partner's   guaranty
          obligation,  as each Partner's  obligation under the Guaranty includes
          not only principal, but also (as provided in the Guaranty) accrued and
          unpaid interest,  late payment penalties and all costs incurred by the
          Bank in collecting any defaulted obligations.  The principal amount of
          the loan is up to $477,000.  The General Partner will guarantee 10% of
          the Loan (up to a $47,700  principal  guaranty).  The Limited Partners
          will individually guarantee 0.5% of the loan (up to a $2,385 principal
          guaranty) for each unit  purchased.  The principal  amount of the Loan
          has not been determined as of the date of this Agreement.
 


                                      -38-




                                                                     EXHIBIT 12
                                                                     ----------



                  PRIME MEDICAL SERVICES, INC. AND SUBSIDIARIES
                COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES
              FOR THE YEARS ENDED DECEMBER 31, 1998, 1997 AND 1996
                                   


                                               Years  Ended  December 31,
                                             1998          1997       1996
                                             ----          ----       ----

Income before income taxes and 
     after minority interest                 $18,172    $ 20,651      $10,957

Undistributed equity income                     (102)       (408)         --

Minority interest income of 
     subsidiaries with fixed charges           1,823       6,074        7,000 
                                               -----       -----      -------

Adjusted earnings                             19,893      26,317       17,957
                                              ======      ======      =======

Interest on debt                               8,469       7,477        5,977  

Debt issuance costs                            4,978         360        2,735
                                              ------        ----       ------
 
Total fixed charges                           13,447       7,837        8,712
                                              ------       -----       ------

Total available earnings 
     before fixed charges                     33,340      34,154       26,669
                                              ======      ======       ======

Ratio                                           2.5         4.4          3.1
                                                ===         ===        ======
 





                                                    
                                                                    EXHIBIT 21.1
                  SUBSIDIARIES OF PRIME MEDICAL SERVICES, INC.
                              AS OF MARCH 19, 1999

    EXHIBIT 21.1
    Name of Subsidiary                           State of Incorporation
    -------------------                          --------------------
    Prime Medical Operating, Inc.                Delaware

    Prime Management, Inc.                       Nevada

    Prime Cardiac Rehabilitation Services, Inc.  Delaware

    Prime Diagnostic Services, Inc.              Delaware

    Prime Lithotripsy Services, Inc.             New York

    Prime Kidney Stone Treatment, Inc.           New Jersey

    Prime Diagnostic Corp. of Florida            Delaware

    Prime Lithotripter Operations, Inc.          New York

    Prime Practice Management, Inc.              New York

    R.R. Litho, Inc.                             Delaware

    Ohio Litho, Inc.                             Delaware

    Alabama Renal Stone Institute, Inc.          Alabama

    Sun Medical Technologies, Inc.               California

    Sun Acquisition, Inc.                        California

    Lithotripters, Inc.                          North Carolina

    FastStart, Inc.                              North Carolina

    National Lithotripters Association, Inc.     North Carolina

    Prostatherapies, Inc                         Delaware

    MedTech Investments, Inc.                    North Carolina

    Executive Medical Enterprises, Inc.          Delaware



                                                                 EXHIBIT 23.1


                          INDEPENDENT AUDITORS' CONSENT
              ----------------------------------------------------


     We consent to  incorporation  by reference in the  registration  statements
(No.  33-70478 and  333-62245) on Form S-8 and (No.  333-12893 and 333-47621) on
Form S-3 of Prime  Medical  Services,  Inc.  of our report  dated March 1, 1999,
relating to the consolidated balance sheets of Prime Medical Services,  Inc. and
subsidiaries  as of  December  31, 1998 and 1997,  and the related  consolidated
statements of income, stockholders' equity, and cash flows for each of the years
in the three-year  period ended  December 31, 1998,  which report appears in the
Annual  Report on Form 10-K of Prime Medical  Services,  Inc. for the year ended
December 31, 1998.


/s/ KPMG LLP
- - --------------------------
Austin, Texas
March 30, 1999

<TABLE> <S> <C>


<ARTICLE>                     5
<LEGEND>
This schedule contains summary financial information extracted from the
December 31, 1998 Form 10-K and is qualified in its entirety by reference to 
such financial statements.
</LEGEND>
<MULTIPLIER>                                   1,000
       
<S>                            <C>               
<PERIOD-TYPE>                   YEAR          
<FISCAL-YEAR-END>               DEC-31-1998      
<PERIOD-START>                  JAN-01-1998      
<PERIOD-END>                    DEC-31-1998      
<CASH>                          40,146              
<SECURITIES>                         0                
<RECEIVABLES>                   22,321            
<ALLOWANCES>                       966                
<INVENTORY>                          0                  
<CURRENT-ASSETS>                69,799               
<PP&E>                          36,558            
<DEPRECIATION>                  18,471             
<TOTAL-ASSETS>                 241,119            
<CURRENT-LIABILITIES>           28,100             
<BONDS>                              0                  
                0                  
                          0                  
<COMMON>                           194                
<OTHER-SE>                      89,556             
<TOTAL-LIABILITY-AND-EQUITY>   241,119            
<SALES>                              0                 
<TOTAL-REVENUES>               104,636             
<CGS>                                0                  
<TOTAL-COSTS>                   39,473             
<OTHER-EXPENSES>                10,476              
<LOSS-PROVISION>                     0                 
<INTEREST-EXPENSE>               8,469              
<INCOME-PRETAX>                 18,171             
<INCOME-TAX>                     7,377              
<INCOME-CONTINUING>             10,794              
<DISCONTINUED>                       0                  
<EXTRAORDINARY>                      0                  
<CHANGES>                            0                  
<NET-INCOME>                    10,794             
<EPS-PRIMARY>                     0.58                 
<EPS-DILUTED>                     0.57               
        
<FN>
NOTE: Due to the change in computing EPS per FASB No. 128, the tags per the 
FDS schedule will correspond to FASB No. 128 as follows: 
     FDS tag                  FASB No. 128
     EPS - Primary            EPS - Basic
     EPS - Diluted            EPS - Diluted

</FN>

</TABLE>


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