SOMANETICS CORP
S-1/A, 1998-03-12
ELECTROMEDICAL & ELECTROTHERAPEUTIC APPARATUS
Previous: CENTURY PROPERTIES FUND XVIII, SC 14D1/A, 1998-03-12
Next: AMERICAN EDUCATION CORPORATION, 8-K, 1998-03-12



<PAGE>   1
 
   
    AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON MARCH 12, 1998.
    
 
   
                                                      REGISTRATION NO. 333-47225
    
================================================================================
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                            ------------------------
   
                               AMENDMENT NO. 1 TO
    
 
                                    FORM S-1
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933
                            ------------------------
 
                             SOMANETICS CORPORATION
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
 
<TABLE>
<S>                                  <C>                                  <C>
              MICHIGAN                               3845                              38-2394784
  (STATE OR OTHER JURISDICTION OF        (PRIMARY STANDARD INDUSTRIAL               (I.R.S. EMPLOYER
   INCORPORATION OR ORGANIZATION)        CLASSIFICATION CODE NUMBER)              IDENTIFICATION NO.)
</TABLE>
 
                            ------------------------
 
                              1653 EAST MAPLE ROAD
                           TROY, MICHIGAN 48083-4208
                                 (248) 689-3050
              (ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER,
       INCLUDING AREA CODE, OF REGISTRANT'S PRINCIPAL EXECUTIVE OFFICES)
 
                                BRUCE J. BARRETT
                     PRESIDENT AND CHIEF EXECUTIVE OFFICER
                             SOMANETICS CORPORATION
                              1653 EAST MAPLE ROAD
                           TROY, MICHIGAN 48083-4208
                                 (248) 689-3050
           (NAME, ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER,
                   INCLUDING AREA CODE, OF AGENT FOR SERVICE)
                            ------------------------
                                   COPIES TO:
 
<TABLE>
<S>                                                   <C>
                  ROBERT J. KRUEGER                                    MICHAEL HIRSCHBERG
          HONIGMAN MILLER SCHWARTZ AND COHN                          PIPER & MARBURY L.L.P.
            2290 FIRST NATIONAL BUILDING                           1251 AVENUE OF THE AMERICAS
            DETROIT, MICHIGAN 48226-3583                          NEW YORK, NEW YORK 10020-1104
                   (313) 256-7675                                        (212) 835-6270
               FAX NO.: (313) 962-0176                               FAX NO.: (212) 835-6001
</TABLE>
 
                            ------------------------
 
     APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: As soon as
practicable after this Registration Statement becomes effective.
 
     If any of the securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, check the following box. [ ]
 
     If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, check the following box and
list the Securities Act registration statement number of the earlier effective
registration statement for the same offering. [ ]  __________
 
     If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [ ]  __________
 
     If this Form is a post-effective amendment filed pursuant to Rule 462(d)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [ ]  __________
 
     If the delivery of the prospectus is expected to be made pursuant to Rule
434, please check the following box. [ ]
                            ------------------------
 
                        CALCULATION OF REGISTRATION FEE
 
   
<TABLE>
<CAPTION>
============================================================================================================================
                                                                   PROPOSED              PROPOSED
                                                                    MAXIMUM              MAXIMUM
        TITLE OF EACH CLASS OF              AMOUNT TO BE        OFFERING PRICE      AGGREGATE OFFERING        AMOUNT OF
     SECURITIES TO BE REGISTERED           REGISTERED(1)         PER SHARE(2)            PRICE(2)         REGISTRATION FEE
- ----------------------------------------------------------------------------------------------------------------------------
<S>                                     <C>                   <C>                  <C>                   <C>
Common Shares, par value $.01 per
share.................................       2,300,000              $6.1875            $14,231,250          $4,198.22(3)
============================================================================================================================
</TABLE>
    
 
   
(1) Includes 300,000 shares which the Underwriters have the option to purchase
    to cover over-allotments, if any.
    
   
(2) Estimated solely for the purpose of computing the registration fee, based on
    a bona fide estimate of the maximum public offering price pursuant to Rule
    457(a), based on the closing sale price of the Common Shares on March 6,
    1998.
    
   
(3) $3,724.38 of this fee was paid with the initial filing.
    
                            ------------------------
 
     THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(A) OF
THE SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(A),
MAY DETERMINE.
================================================================================
<PAGE>   2
 
INFORMATION CONTAINED HEREIN IS SUBJECT TO COMPLETION OR AMENDMENT. A
REGISTRATION STATEMENT RELATING TO THESE SECURITIES HAS BEEN FILED WITH THE
SECURITIES AND EXCHANGE COMMISSION. THESE SECURITIES MAY NOT BE SOLD NOR MAY
OFFERS TO BUY BE ACCEPTED PRIOR TO THE TIME THE REGISTRATION STATEMENT BECOMES
EFFECTIVE. THIS PROSPECTUS SHALL NOT CONSTITUTE AN OFFER TO SELL OR THE
SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY SALE OF THESE SECURITIES
IN ANY STATE IN WHICH SUCH OFFER, SOLICITATION OR SALE WOULD BE UNLAWFUL PRIOR
TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS OF ANY SUCH STATE.
 
   
                  SUBJECT TO COMPLETION, DATED MARCH 12, 1998
    
PROSPECTUS
 
                                   2,000,000
 
                                SOMANETICS LOGO
 
                                 COMMON SHARES
 
                            ------------------------
 
   
     All of the 2,000,000 Common Shares, par value $.01 per share ("Common
Shares"), offered hereby are being sold by Somanetics Corporation ("Somanetics"
or the "Company").
    
 
   
     Since December 27, 1994, the Company's Common Shares have been included in
The Nasdaq SmallCap Market under the symbol "SMTS." On March 6, 1998, the last
reported sales price of the Company's Common Shares was $6.19. See "Price Range
of Common Shares and Dividend Policy."
    
 
                            ------------------------
 
      THESE ARE SPECULATIVE SECURITIES. THE SHARES OFFERED HEREBY INVOLVE A HIGH
DEGREE OF RISK. SEE "RISK FACTORS" BEGINNING ON PAGE 7 HEREOF.
 
   
                            ------------------------
    
 
    THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES
     AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE
     SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION
          PASSED UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY
             REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
 
   
<TABLE>
<CAPTION>
=============================================================================================================
                                                                  UNDERWRITING
                                           PRICE TO              DISCOUNTS AND               PROCEEDS
                                            PUBLIC               COMMISSIONS(1)           TO COMPANY(2)
- -------------------------------------------------------------------------------------------------------------
<S>                                <C>                      <C>                      <C>
Per Share.........................            $                        $                        $
- -------------------------------------------------------------------------------------------------------------
Total(3)..........................            $                        $                        $
=============================================================================================================
</TABLE>
    
 
   
(1) The Company has agreed to indemnify the several Underwriters against certain
    liabilities, including liabilities under the Securities Act of 1933, as
    amended. See "Underwriting."
    
 
(2) Before deducting expenses of the offering payable by the Company estimated
    to be $250,000.
 
   
(3) The Company has granted the Underwriters a 30-day option to purchase up to
    an aggregate of 300,000 additional Common Shares on the same terms and
    conditions as the Common Shares offered hereby solely to cover
    over-allotments, if any. If the Underwriters exercise this option in full,
    the total Price to Public, Underwriting Discounts and Commissions and
    Proceeds to Company will be $          , $          and $          ,
    respectively. See "Underwriting."
    
 
   
     The Common Shares offered hereby are offered by the Underwriters, subject
to prior sale when, as and if delivered to and accepted by the Underwriters and
subject to certain other conditions. The Underwriters reserve the right to
withdraw, cancel or modify such offer and to reject orders in whole or in part.
It is expected that delivery of the certificates representing Common Shares will
be made at the offices of Brean Murray & Co., Inc. in New York, New York on or
about           , 1998.
    
 
                            ------------------------
 
                            BREAN MURRAY & CO., INC.
                            ------------------------
 
               The date of this Prospectus is             , 1998
<PAGE>   3
 
WINDOW TO THE BRAIN
    [Picture of the new model 4100
          Cerebral Oximeter]
 
Surgeons, anesthesiologists and other
critical care medical professionals use
the information provided by the
Cerebral Oximeter as a "window to the
brain" to identify brain oxygen
imbalances and take corrective action.
 
            BENEFITS OF THE
           CEREBRAL OXIMETER
- - Non-invasive
- - Continuous information
- - Organ specific
- - Bi-lateral monitoring
- - Easy-to-use
- - Relatively inexpensive
- - Effective in difficult
  circumstances
 
   
- - Portable
    
"THIS PROVIDES AN EARLY WARNING SYSTEM OF CHANGES IN BRAIN OXYGENATION, SO
                                         WE CAN TAKE ACTION TO PROTECT THE
                                         PATIENT WHILE OXYGEN LEVELS ARE
                                         STILL ADEQUATE."
 
                                                        Martin Noveck, M.D.
                                                       Anesthesiologist
                                                       St. Joseph Mercy
                                                       Hospital Oakland
   
                                                       Pontiac, MI
    
 
                                         [Picture of two SomaSensors on patient]
 
The model 4100 Cerebral Oximeter is the only FDA-cleared, non-invasive patient
                                         monitoring system that provides
                                         continuous information about changes in
                                         the blood oxygen level in both sides of
                                         the adult brain. It uses a single-use,
                                         non-invasive, disposable SomaSensor
                                         that can be adhered to both sides of
                                         the patient's forehead to offer
                                         simultaneous bi-lateral monitoring.
                                         Users of the Cerebral Oximeter will be
                                         required to purchase SomaSensors on a
                                         regular basis.
 
   
     CERTAIN PERSONS PARTICIPATING IN THIS OFFERING MAY ENGAGE IN TRANSACTIONS
THAT STABILIZE, MAINTAIN OR OTHERWISE AFFECT THE PRICE OF THE COMMON SHARES,
INCLUDING STABILIZING, SYNDICATE SHORT COVERING AND PENALTY BID TRANSACTIONS.
FOR A DESCRIPTION OF THESE ACTIVITIES, SEE "UNDERWRITING."
    
 
   
     IN CONNECTION WITH THIS OFFERING, CERTAIN UNDERWRITERS MAY ENGAGE IN
PASSIVE MARKET MAKING TRANSACTIONS IN THE COMMON SHARES ON NASDAQ IN ACCORDANCE
WITH RULE 103 OF REGULATION M. SEE "UNDERWRITING."
    
<PAGE>   4
 
                               TABLE OF CONTENTS
 
   
<TABLE>
<CAPTION>
                                                              PAGE
                                                              ----
<S>                                                           <C>
Prospectus Summary..........................................    4
Risk Factors................................................    7
Use of Proceeds.............................................   15
Price Range of Common Shares and Dividend Policy............   16
Capitalization..............................................   17
Dilution....................................................   18
Selected Financial Data.....................................   19
Management's Discussion and Analysis of Financial Condition
  and Results of Operations.................................   20
Business....................................................   25
Management..................................................   39
Certain Transactions........................................   47
Principal Shareholders......................................   48
Description of Capital Stock................................   49
Underwriting................................................   51
Legal Matters...............................................   52
Experts.....................................................   52
Available Information.......................................   52
Glossary....................................................   54
Index to Financial Statements...............................  F-1
</TABLE>
    
 
                            ------------------------
 
   
     No dealer, sales representative or any other person has been authorized to
give any information or to make any representations in connection with this
offering other than those contained in this Prospectus, and, if given or made,
such information or representations must not be relied upon as having been
authorized by the Company or the Underwriters. This Prospectus does not
constitute an offer to sell or a solicitation of an offer to buy any security
other than in connection with the offer made by this Prospectus, nor does it
constitute an offer to sell or a solicitation of any offer to buy the Common
Shares offered hereby in any jurisdiction in which such an offer or solicitation
is not authorized, or in which the person making such offer or solicitation is
not qualified to do so, or to any person to whom it is unlawful to make such
offer or solicitation. Neither the delivery of this Prospectus nor any sale made
hereunder shall, under any circumstances, create any implication that the
information contained herein is correct as of any time subsequent to its date.
    
 
                                        3
<PAGE>   5
 
                               PROSPECTUS SUMMARY
 
   
     The following summary is qualified in its entirety by the more detailed
information and Financial Statements and Notes to Financial Statements appearing
elsewhere in this Prospectus, including information under "Risk Factors." The
Common Shares offered hereby involve a high degree of risk and investors should
carefully consider information set forth in "Risk Factors." Unless otherwise
indicated, all information contained in this Prospectus (i) gives effect to a
1-for-10 reverse split effected April 10, 1997 and (ii) assumes that the
Underwriters' over-allotment option as described in "Underwriting" is not
exercised.
    
 
                                  THE COMPANY
 
     Somanetics develops, manufactures and markets the INVOS(R) Cerebral
Oximeter (the "Cerebral Oximeter"), the only FDA-cleared, non-invasive patient
monitoring system that continuously measures changes in the blood oxygen level
in the adult brain. The Cerebral Oximeter was developed to meet the need for
information about oxygen in the brain, the organ least tolerant of oxygen
deprivation. Without sufficient oxygen, brain damage may occur within a few
minutes, which can result in paralysis, severe and complex disabilities or
death. Brain oxygen information, therefore, is important, especially in surgical
procedures requiring general anesthesia and in other critical care situations
with a high risk of brain oxygen imbalances.
 
     The Company targets surgical procedures with a high risk of brain oxygen
imbalances, such as cardiovascular and vascular surgeries and surgeries on
elderly patients involving abnormal blood pressure. Surgeons, anesthesiologists
and other medical professionals use the Cerebral Oximeter to identify brain
oxygen imbalances and take corrective action, potentially improving patient
outcome and reducing the cost of care. An independent industry report estimates
that there are approximately 62,000 operating rooms worldwide performing
approximately 48 million surgeries involving general anesthesia every year.
 
     The Cerebral Oximeter is a relatively inexpensive, portable and easy-to-use
monitoring system placed at a patient's bedside in hospital critical care areas,
especially operating rooms, recovery rooms, intensive care units ("ICUs") and
emergency rooms. It is comprised of (i) a portable unit including a computer and
a display monitor, (ii) dual single-use, disposable sensors, the SomaSensors(R),
(iii) proprietary software and (iv) a preamplifier cable. SomaSensors can be
adhered to both sides of a patient's forehead to offer bi-lateral monitoring and
are connected to the computer through the preamplifier cable. The computer uses
the Company's proprietary software to analyze information received from the
SomaSensor and provides a continuous digital and trend display on the monitor of
an index of the oxygen saturation in the area of the brain under the SomaSensor.
Users of the Cerebral Oximeter will be required to purchase disposable
SomaSensors on a regular basis because of their single-use nature.
 
   
     The Cerebral Oximeter is based on the Company's proprietary In Vivo Optical
Spectroscopy ("INVOS") technology. INVOS analyzes various characteristics of
human blood and tissue by measuring and analyzing low-intensity visible and
near-infrared light transmitted into portions of the body. The use of optical
spectroscopy in the body has not generally been useful when the substances to be
measured are surrounded by, are behind or are near bone, muscle or other tissue,
because the transmission, scattering and absorption of the transmitted light
produces extraneous data that interferes with analysis of the data from the area
being examined. The Company has developed a method of reducing extraneous
spectroscopic data caused by surrounding bone, muscle and other tissue, thereby
allowing it to gather information about portions of the body which previously
could not be analyzed using traditional optical spectroscopy.
    
 
     The Company's objective is to establish the Cerebral Oximeter as a
"standard of care" in surgical procedures requiring general anesthesia and in
other critical care situations. Key elements of the Company's strategy are (i)
target surgical procedures with a high risk of brain oxygen imbalances, (ii)
demonstrate the clinical benefits, and promote acceptance, of the Cerebral
Oximeter, (iii) expand marketing and sales activities, (iv) develop additional
applications of the Cerebral Oximeter and (v) license its technology to medical
device manufacturers. In addition, the Company is analyzing the feasibility of
other applications of its technology.
 
                                        4
<PAGE>   6
 
     The Company sells the Cerebral Oximeter in the United States through its
direct sales force and seven independent distributors. Internationally, the
Company sells its product through 26 independent distributors covering 70
countries, including Baxter Limited in Japan. From the commencement of
commercial shipments of the new model 4100 Cerebral Oximeter in January 1998
through February 28, 1998, the Company has sold 88 Cerebral Oximeters to
distributors and customers. More than 200 United States hospitals currently use
the Cerebral Oximeter, including the Mayo Clinic Scottsdale, UCLA Medical
Center, Orlando Regional Medical Center, the Duke Heart Center, University of
Louisville Hospital, the University of Pittsburgh Medical Center, the University
of Florida-Shands Hospital, the University of Alabama at Birmingham Hospital,
the State University of New York (SUNY) Health Center and Johns Hopkins Medical
Center.
 
     The Company was incorporated in the State of Michigan on January 15, 1982.
The Company's headquarters are located at 1653 East Maple Road, Troy, Michigan
48083-4208. Its telephone number is (248) 689-3050.
 
                                  THE OFFERING
 
<TABLE>
<S>                                                    <C>
Common Shares Offered by the Company.................  2,000,000 shares
Common Shares Outstanding After the Offering(1)......  6,285,334 shares
Use of Proceeds......................................  To finance the Company's operations, including
                                                       marketing and sales activities, research and
                                                       development programs and for other general
                                                       corporate purposes, including working capital.
                                                       See "Use of Proceeds."
Nasdaq Symbol........................................  "SMTS"
</TABLE>
 
- ---------------
 
(1) Excludes (i) an aggregate of up to 1,043,872 Common Shares reserved for
    issuance under the Company's 1983 Stock Option Plan, 1991 Incentive Stock
    Option Plan, 1993 Director Stock Option Plan, 1997 Stock Option Plan and
    non-plan options, of which options to purchase an aggregate of 568,495
    Common Shares were outstanding as of February 28, 1998, (ii) 79,394 Common
    Shares issuable upon the exercise of warrants (the "Regulation S Agent
    Warrants") issued in connection with Regulation S financings completed in
    August 1994, July 1995 and April 1996 (the "Regulation S Offerings"), (iii)
    115,520 Common Shares issuable upon the exercise of warrants (the
    "Regulation S Warrants") issued in connection with the Regulation S
    Offerings completed in July 1995 and April 1996 and (iv) 200,000 Common
    Shares issuable upon exercise of the warrants issued to the underwriter in
    connection with the Company's public offering of Common Shares which closed
    in June 1997 (the "Representative's Warrants"). See Notes 3 and 8 of Notes
    to Financial Statements.
 
                                        5
<PAGE>   7
 
                             SUMMARY FINANCIAL DATA
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)
 
   
<TABLE>
<CAPTION>
                                                               FISCAL YEAR ENDED NOVEMBER 30,
                                                 -----------------------------------------------------------
                                                  1997         1996         1995         1994         1993
                                                 -------      -------      -------      -------      -------
<S>                                              <C>          <C>          <C>          <C>          <C>
STATEMENT OF OPERATIONS DATA:
Net revenues...................................  $ 1,212      $   778      $ 1,336      $   938      $ 1,547
Cost of sales..................................      632          385          658          464          763
Gross margin...................................      580          393          678          474          784
Research, development and engineering
  expenses.....................................      736          235          286          550        1,150
Selling, general and administrative expenses...    6,238        3,550        3,303        4,347        6,063
Net loss.......................................  $(6,155)     $(3,304)     $(2,818)     $(4,332)     $(6,136)
Net loss per Common Share -- Basic and
  Diluted(1)...................................  $ (1.88)     $ (1.77)     $ (1.67)     $ (3.41)     $ (5.75)
Weighted average number of Common Shares
  outstanding(1)...............................    3,272        1,867        1,684        1,270        1,068
</TABLE>
    
 
   
<TABLE>
<CAPTION>
                                                                  NOVEMBER 30, 1997
                                                              -------------------------
                                                               ACTUAL    AS ADJUSTED(2)
                                                              --------   --------------
<S>                                                           <C>        <C>
BALANCE SHEET DATA:
Cash and marketable securities..............................  $  4,603      $ 15,924
Working capital.............................................     4,511        15,832
Total assets................................................     5,677        16,998
Long-term debt..............................................        --            --
Accumulated deficit.........................................   (36,367)      (36,367)
Shareholders' equity(3).....................................     4,889        16,210
</TABLE>
    
 
- ---------------
 
   
(1) See Note 4 of Notes to Financial Statements included in this Prospectus for
    information with respect to the calculation of per share data. During the
    first quarter of fiscal 1998, the Company adopted Statement of Financial
    Accounting Standards ("SFAS") No. 128, "Earnings Per Share." The adoption of
    SFAS No. 128 had no impact on the reported loss per share for all periods
    presented.
    
 
   
(2) Adjusted to reflect the sale of 2,000,000 Common Shares offered by the
    Company hereby at the offering price set forth on the cover page of this
    Prospectus (after deducting underwriting discounts and commissions and
    estimated offering expenses) and the application of the estimated net
    proceeds from such sale. See "Use of Proceeds" and "Capitalization."
    
 
(3) See Statements of Shareholders' Equity of the Financial Statements included
    in this Prospectus for an analysis of Common Share transactions for the
    period from December 1, 1994 through November 30, 1997.
 
   
RECENT DEVELOPMENTS
    
 
   
     The Company has announced its unaudited first quarter results. Net revenues
for the first fiscal quarter ended February 28, 1998 were $803,365 from sales of
its Cerebral Oximeter and disposable SomaSensor. This represents a 127% increase
over net revenues of $353,863 for the same period in 1997. For the first quarter
of fiscal 1998, the Company reported a net loss of $1,173,100, or 27 cents per
Common Share -- basic and diluted, compared to a net loss of $1,308,412, or 57
cents per Common Share -- basic and diluted, for the same period of 1997. The
net loss decrease is primarily attributable to increased sales, partially offset
by increased selling, general and administrative expenses. The decrease in net
loss per Common Share -- basic and diluted is primarily attributable to an
increase in the weighted average number of Common Shares outstanding.
    
 
                                        6
<PAGE>   8
 
                                  RISK FACTORS
 
     This Prospectus contains certain forward-looking statements within the
meaning of the Securities Act of 1933, as amended, and the Securities Exchange
Act of 1934, as amended. Actual results could differ materially from those
projected in the forward-looking statements as a result of certain risks and
uncertainties set forth below and elsewhere in this Prospectus. An investment in
the Common Shares offered hereby involves a high degree of risk. Prospective
investors should carefully consider the following risk factors, in addition to
the other information set forth in this Prospectus, in connection with an
investment in the Common Shares offered hereby.
 
HISTORY OF LOSSES AND COMPANY'S ABILITY TO CONTINUE AS A GOING CONCERN
 
     The Company has incurred net losses in every year of its existence. From
its inception on January 15, 1982 through November 30, 1997, the Company
incurred an accumulated deficit of $36,366,536, including a net loss of
$6,155,483 for the year ended November 30, 1997. The Company should be evaluated
in light of the delays, expenses, problems and uncertainties frequently
encountered by companies developing markets for new products. Due to a number of
factors, including the need for customer education about the clinical benefits
of the Cerebral Oximeter, the lengthy sales cycle, the need to attract and
service a customer base, the ability to manufacture its product on a commercial
scale in a cost-effective manner, the development of new products and increased
expenses in fiscal 1998 primarily due to the increase in the number of
employees, the Company does not believe that product sales will be sufficient to
support its operations in fiscal 1998. Therefore, in the foreseeable future, the
Company believes that such expenses will increase the Company's net losses, and
there can be no assurance that the Company will ever be profitable. Due to the
Company's history of losses and its current financial condition, the Company's
independent auditors' report includes an explanatory paragraph referring to an
uncertainty concerning the Company's ability to continue as a going concern. See
"Management's Discussion and Analysis of Financial Condition and Results of
Operations," Note 2 of Notes to Financial Statements and "Independent Auditors'
Report."
 
   
DEPENDENCE ON THE CEREBRAL OXIMETER AND SOMASENSOR
    
 
     The Cerebral Oximeter and the related SomaSensor are currently the
Company's only commercial product and will account for substantially all of the
Company's revenues for the foreseeable future. The Company has limited
experience in manufacturing, marketing and selling the Cerebral Oximeter. The
Cerebral Oximeter has not had extensive use in a commercial environment and has
not been evaluated for every medical procedure in which it might be used.
Further research or use of the Cerebral Oximeter might reveal unexpected
problems with its operation or performance, especially in connection with
medical procedures for which the Cerebral Oximeter has not yet been evaluated.
Although the Company's testing of the Cerebral Oximeter to date indicates
clinical benefits, subsequent performance problems could prevent acceptance of
the product by the medical community, result in unanticipated expense and
adversely affect future sales of its product. Since the Cerebral Oximeter and
the related SomaSensor represent the Company's primary near-term focus, if the
market for the Cerebral Oximeter fails to develop, or fails to develop as
rapidly as expected, the Company's business, financial condition and results of
operations could be adversely affected. Although the Company is developing other
products, there can be no assurance that any commercial products will result
from its efforts.
 
UNCERTAINTY OF ACCEPTANCE BY THE MEDICAL COMMUNITY
 
     To date, the medical community has had little exposure to the Company or
its technology. Because the medical community is often skeptical of new
companies and new technologies, no assurance can be given that members of the
medical community will perceive a need for the Cerebral Oximeter or be convinced
of its clinical benefits. In addition, hospital capital equipment purchasing
decisions are often made by hospital purchasing committees that might not
include the user of the monitoring system. In such a case, such committees will
have to be convinced to purchase the Company's product. Even if the Company is
successful in convincing physicians, other medical professionals and their
hospital purchasing committees of the need for the Cerebral Oximeter, they might
be unwilling or unable to commit funds to the purchase of the Cerebral
                                        7
<PAGE>   9
 
Oximeter due to institutional budgetary constraints or decreases in capital
expenditures. In many cases, these constraints are due to hospital cost
controls, increased managed care and fixed reimbursements for the medical
procedures in which the Cerebral Oximeter is used. If the Company's product
fails to achieve market acceptance, the Company's business, financial condition
and results of operations could be adversely affected.
 
     Part of the Company's marketing strategy is to support clinical research
programs and encourage peer-to-peer selling. While the Company believes
favorable peer review is a key element to a product's acceptance by the medical
community, there can be no assurance that additional papers will be submitted or
that any such papers will help the Company sell Cerebral Oximeters. In addition,
researchers might publish adverse results. For example, in fiscal 1993
researchers in the United Kingdom published adverse results from research
regarding an earlier prototype of the Cerebral Oximeter. While publications in
fiscal 1997 and 1996 were generally favorable, in 1996 some researchers
published adverse results after using the Cerebral Oximeter beyond its indicated
use. Negative reaction to these publications, the Company's financial condition
and the rescission of the Company's previous FDA clearance for the Cerebral
Oximeter could adversely affect the Company's reputation in the medical
community and, as a result, its ability to market and sell its product. See
"Business -- Marketing, Sales and Distribution."
 
LENGTHY SALES CYCLE
 
     The decision-making process for the Company's customers is often complex
and time-consuming. Based on its limited experience, the Company believes the
period between initial discussions concerning the Cerebral Oximeter and a
purchase of even one unit is a minimum of six to nine months. The process can be
delayed even further as a result of hospital capital budgeting procedures.
Moreover, even if one or two units are sold to a hospital, the Company believes
that it will take additional time and experience with the Cerebral Oximeter
before additional medical professionals in the hospital might be interested in
using the Cerebral Oximeter in other procedures or other areas of the hospital.
These delays could have an adverse effect on the Company's business, financial
condition and results of operations. See "Business -- Marketing, Sales and
Distribution."
 
COMPETITION
 
   
     The Company believes that the market for cerebral oximetry products, if it
develops, may become highly competitive. The Company is aware of foreign
companies that have sold products relating to cerebral metabolism monitoring for
research or evaluation. In addition, the medical equipment industry is
characterized by intense competition and extensive research and development.
Other companies and individuals are engaged in research and development of
non-invasive cerebral oximeters, and the Company believes there are many other
potential entrants into the market. Some of these potential competitors have
well-established reputations, customer relationships and marketing, distribution
and service networks, and have substantially longer histories in the medical
equipment industry, larger product lines, and greater financial, technical,
manufacturing, research and development and management resources than those of
the Company. Many of these potential competitors have long-term product supply
relationships with the Company's potential customers. These potential
competitors may succeed in developing products that are at least as reliable and
effective as the Company's product, that make additional measurements, or that
are less costly than the product developed by the Company. These potential
competitors may be more successful than the Company in manufacturing and
marketing their products, and may be able to take advantage of the significant
time and effort invested by the Company to gain medical acceptance of cerebral
oximetry. In addition, two patents issued to an unaffiliated third party and
relating to cerebral oximetry will expire this year, making that technology
generally available and potentially helping the development of competing
products. Successful commercial development of competing products could lead to
loss of market share and lower margins and have an adverse effect on the
Company's business, financial condition and results of operations.
    
 
     The Company also competes indirectly with numerous companies that sell
various types of medical equipment to hospitals for the limited amount of
funding allocated to capital equipment in hospital budgets. The market for
medical equipment is subject to rapid change due to an increasingly competitive,
cost-conscious environment and to government programs intended to reduce the
cost of medical care. Many of these manufacturers of medical equipment are
large, well-established companies whose resources, reputations
                                        8
<PAGE>   10
 
and ability to leverage existing customer relationships may give them a
competitive advantage over the Company. The Company's product and technology
also compete indirectly with many other methods currently used to measure blood
oxygen levels or the effects of low blood oxygen levels. See "Business -- Market
Overview," and "-- Competition."
 
NEED FOR ADDITIONAL FINANCING
 
     The Company expects that the net proceeds of this offering will be adequate
to satisfy its operating and capital requirements into the year 2000. However,
changes in the Company's business or business plan or unexpected expenses could
affect the Company's capital requirements. The Company's future capital
requirements will depend on many factors, including, but not limited to, the
cost of marketing and assembly activities, whether it can successfully market
its product, the rate of market acceptance, the scope of research and
development programs, the length of time required to collect accounts
receivable, and competing technological and market developments. If additional
financing is needed, it might not be available on terms acceptable to the
Company or at the times required by the Company, if at all, and such financing
might dilute the interests of existing shareholders. See "Use of Proceeds," and
"Management's Discussion and Analysis of Financial Condition and Results of
Operations."
 
FLUCTUATIONS IN QUARTERLY OPERATING RESULTS
 
     The Company has experienced, and expects to continue to experience,
significant fluctuations in its quarterly operating results. The Company's
future operating results are dependent upon a number of factors, including, but
not limited to, the demand for its product, the timing of its sales, the length
of its sales cycle, the timing and development of any competing products, the
publication of clinical research results regarding the product, the use of the
Company's product as a "standard of care" by any hospitals, the timing of new
employee hiring and economic conditions, both generally and in the medical
equipment industry. In particular, the Company does not expect to have a
material backlog of unfilled orders, so any shortfall in demand for the
Company's product in relation to the Company's expectations, or any material
delay in orders from distributors or customers, could have an almost immediate
impact on the Company's business, financial condition and results of operations.
See "Management's Discussion and Analysis of Financial Condition and Results of
Operations."
 
DEPENDENCE UPON MANAGEMENT AND KEY PERSONNEL
 
     The Company's future performance depends in significant part upon the
continued service of its senior management, including Bruce J. Barrett,
President and Chief Executive Officer, Raymond W. Gunn, Executive Vice President
and Chief Financial Officer, and certain scientific, technical and manufacturing
personnel. The loss of any such key personnel by the Company could have an
adverse effect on the Company. The Company does not maintain key-man life
insurance on any such key personnel. The Company also plans to hire additional
key employees in fiscal 1998. Competition for qualified employees is intense,
and an inability to attract, retain and motivate additional, highly-skilled
employees required for the expansion of the Company's operations could adversely
affect the Company's business, financial condition and results of operations.
The Company's ability to retain existing employees and attract new employees may
be adversely affected by its current financial situation. There can be no
assurance that the Company will be able to retain its existing personnel or
attract additional, qualified persons when required and on acceptable terms. See
"Business -- Employees," and "Management."
 
DEPENDENCE ON DISTRIBUTORS
 
     The Company is substantially dependent on its distributors to generate
sales of Cerebral Oximeters, especially internationally. Although the Company
believes its current distributors to be knowledgeable and has a training program
for new distributors concerning the Company's technology and its product,
independent distributors might not have sufficient knowledge about, or
familiarity with, the Company's technology or its product to demonstrate
adequately its operation and clinical benefits. Failure of distributors to
market,
 
                                        9
<PAGE>   11
 
promote and sell the Company's product adequately would have an adverse effect
on the Company's business, financial condition and results of operations.
 
     There can be no assurance that the Company will be able to engage
additional distributors on a timely basis or enter into other third-party
marketing arrangements, and retain or replace its existing distributors. The
Company's inability to engage, replace or retain distributors could have an
adverse effect on its ability to market and sell its product. Distributor
terminations might increase the Company's costs. Even if such distributors are
engaged and retained, they might incur conflicting obligations to sell other
companies' products or might distribute other products that provide greater
revenues than are provided by the Company's product.
 
     Two international distributors and one United States distributor accounted
for approximately 28%, 11% and 12%, respectively, of net revenues for fiscal
1997. The loss of any of these distributors would have an adverse effect on the
Company's business, financial condition and results of operations. See "Business
- --Marketing, Sales and Distribution."
 
PROPRIETARY RIGHTS; RISK OF INFRINGEMENT
 
     Although thirteen United States patents have been issued to the Company
with respect to its technology, only eight of such patents expressly refer to
examination of the brain or developments involving the Cerebral Oximeter. Many
patents have already been issued to third parties involving optical spectroscopy
and the interaction of light with tissue, some of which relate to the use of
optical spectroscopy in the area of brain metabolism monitoring, which is the
primary use of the Cerebral Oximeter. No patent infringement claims have been
asserted against the Company, although the development of a significant market
for cerebral oximeters would give potential competitors more incentive to assert
infringement claims or challenge the Company's patents. The costs of defense of
patent litigation can be substantial and, if such defense were unsuccessful, the
Company could be liable for substantial damages. In addition, if it were
determined that the Company's product infringed any claims of an issued patent,
the Company could be enjoined from manufacturing or selling its product or
forced to obtain a license in order to continue the manufacture or sale of its
product, requiring payment of a licensing fee or royalties of unknown magnitude
on sales of its product. If the Company were required to obtain a license, it
might not be available, or available on terms acceptable to the Company. Any
inability to obtain required licenses on favorable terms, or at all, would
adversely affect the Company's business, financial condition and results of
operations.
 
     There can be no assurance that any additional patent applications will be
allowed, any issued patents would be upheld, any issued patents will provide the
Company with significant competitive advantages, or challenges will not be
instituted against the validity or enforceability of any patents owned by the
Company or, if instituted, that such challenges will not be successful. If
patents are not issued from future patent applications, the Company may be
subject to greater competition. The cost of litigation to uphold the validity of
a patent and prevent infringement can be very substantial and could be beyond
the Company's financial capability even if the Company could otherwise prevail.
Also, the laws of certain foreign countries do not protect the Company's
proprietary rights to the same extent as the laws of the United States.
Furthermore, individuals and companies might independently develop similar
technologies, duplicate the Company's technology or design around the patented
aspects of the Company's technology, or the Company might infringe patents or
other rights owned by other individuals and companies. The Company's technology
primarily represents improvements or adaptations of known optical spectroscopy
technology, which might be duplicated or discovered through its patents, reverse
engineering or both. Two patents issued to an unaffiliated third party and
relating to cerebral oximetry will expire this year, making that technology
generally available. The development or emergence of competing products or
technologies could have an adverse effect on the Company's business, financial
condition and results of operations. The Company also relies on trade secret,
copyright and other laws and on confidentiality agreements to protect its
technology, but believes that neither its patents nor other legal rights will
necessarily prevent other individuals and companies from developing or from
using similar or related technology to compete against the Company's product.
There can be no assurance that confidentiality agreements will not be breached,
that the Company would have adequate
 
                                       10
<PAGE>   12
 
remedies for any breach, or that the Company's trade secrets will not otherwise
become known to, or independently developed by, competitors. See "Business --
Proprietary Rights Information."
 
MANAGEMENT OF GROWTH
 
     The Company anticipates entering a period of rapid growth and expansion,
which is expected to place a significant strain on the Company's management,
customer service, operations, sales and administrative personnel and other
resources. In order to serve the needs of its existing and future customers, the
Company has increased and will continue to increase its workforce, which
requires the Company to attract, train, motivate and manage qualified employees.
The Company has incurred and continues to incur significant costs to retain
qualified management, sales and marketing, engineering, production,
manufacturing and administrative personnel and scientists, as well as for
marketing and promotional activities. The Company's ability to manage its
planned growth depends upon the Company's success in continuing to expand its
operating, management, information and financial systems, which may
significantly increase its operating expense. There can be no assurance that the
Company will be able to manage effectively any future growth, and any failure to
do so would have an adverse effect on the Company's business, financial
condition and results of operations. See "-- Dependence Upon Management and Key
Personnel," "Business -- Employees," and "Management -- Directors and Executive
Officers."
 
RISKS ASSOCIATED WITH NEW PRODUCT DEVELOPMENT
 
     The Company has invested, and expects to continue to invest, substantial
resources to further develop the Cerebral Oximeter, the related disposable
SomaSensor, product extensions of the Cerebral Oximeter for use on children and
newborns, and other applications of its technology. New products require
extensive testing and regulatory clearance before they can be marketed, and
substantial customer education concerning product use, advantages and
effectiveness. In addition, the Company's products might meet market resistance
in their primary markets because of resistance to major capital equipment
expenditures by hospital purchasing committees and because hospitals might fear
that the cost of a new device will lower its profits because medical insurers
generally fix reimbursement amounts for the procedures in which the Company's
products might be used. There can be no assurance that the Company will be able
to successfully apply its technology in the development of commercially viable
products. See "Use of Proceeds" and "Business -- Research and Development."
 
GOVERNMENT REGULATION
 
     The testing, manufacture and sale of the Company's product are subject to
regulation by numerous governmental authorities, principally the FDA and
corresponding state and foreign agencies. Pursuant to the Federal Food, Drug,
and Cosmetic Act, and the regulations promulgated thereunder, the FDA regulates
the preclinical and clinical testing, manufacture, labeling, distribution and
promotion of medical devices. Noncompliance with applicable requirements can
result in, among other things, fines, injunctions, civil penalties, recall or
seizure of products, total or partial suspension of production, failure of the
government to grant premarket clearance or premarket approval for devices,
withdrawal of marketing clearances or approvals and criminal prosecution, any of
which actions could have an adverse effect on the Company's business, financial
condition and results of operations.
 
     In October 1997, the Company obtained FDA clearance for advances in its
INVOS technology that are incorporated in its new model 4100 Cerebral Oximeter.
The Company has made additional changes to the model 3100A Cerebral Oximeter
that resulted in the model 4100 Cerebral Oximeter. The Company does not believe
that these changes affect the safety or efficacy of the Cerebral Oximeter and,
therefore, the Company believes that these changes do not require the submission
of a new 510(k) notice. There can be no assurance, however, that the FDA would
agree with the Company's determination not to submit a new 510(k) notice for the
new model 4100 Cerebral Oximeter or that the FDA would not require the Company
to submit a new 510(k) notice for any changes made to the device. If the FDA
requires the Company to submit a new 510(k) notice for its new model 4100
Cerebral Oximeter or for any device modification, the Company may be
 
                                       11
<PAGE>   13
 
prohibited from marketing the modified device until the 510(k) notice is cleared
by the FDA. See "Business -- Government Regulation."
 
     There can be no assurance that the Company's current FDA clearance to
market the Cerebral Oximeter in the United States will not be rescinded or that,
if and when any additional products are developed by the Company, they will
receive FDA clearance. If any current or future clearances or approvals are
rescinded or denied, sales of the Company's product in the United States would
be prohibited during the period the Company does not have such clearances. There
can be no assurance that the Company will be able to obtain necessary regulatory
approvals or clearances on a timely basis or at all, and delays in receipt of or
failure to receive such approvals or clearances, the loss of previously received
approvals or clearances, limitations on intended use imposed as a condition of
such approvals or clearances, any limitations on the Company's market required
by any clearances, any resulting delays in market introduction or failure to
comply with existing or future regulatory requirements would have an adverse
effect on the Company's business, financial condition and results of operations.
See "Business -- Government Regulation."
 
     The Company is subject to routine inspection by the FDA and certain state
agencies for compliance with Good Manufacturing Practice ("GMP") and other
applicable regulations. Changes in existing requirements or adoption of new
requirements could have an adverse effect on the Company's business, financial
condition and results of operations. There can be no assurance that the Company
will not incur significant costs to comply with laws and regulations in the
future or that laws and regulations will not have an adverse effect upon the
Company's business, financial condition and results of operations.
 
     The Company also is subject to numerous federal, state and local laws
relating to such matters as safe working conditions, manufacturing practices,
environmental protection, fire hazard control and disposal of hazardous or
potentially hazardous substances. There can be no assurance that the Company
will not be required to incur significant costs to comply with such laws and
regulations in the future or that such laws or regulations will not have an
adverse effect upon the Company's ability to do business.
 
     Congress recently enacted the FDA Modernization Act of 1997. This law is
intended to make the regulatory process more consistent and efficient. It is too
early to determine whether, or how, these new requirements will affect the
Company.
 
PRODUCTS LIABILITY
 
     The testing, marketing and sale of patient monitoring devices entail an
inherent risk that products liability claims will be asserted against the
Company. The Cerebral Oximeter is intended to be used in operating rooms and
other critical care hospital units with patients who may be seriously ill or may
be undergoing dangerous procedures. On occasion, patients on whom the Cerebral
Oximeter is being used may sustain injury or die as a result of their medical
treatment or condition. If litigation is initiated because of such injury or
death, the Company may be sued, and regardless of whether it is ultimately
determined to be liable, the Company may incur significant legal expenses not
covered by insurance. In addition, products liability litigation could damage
the Company's reputation and therefore impair its marketing ability. Such
litigation could also impair the Company's ability to retain products liability
insurance or make such insurance more expensive. The Company has products
liability insurance with a liability limit of $2,000,000. Such insurance is
costly and even though it has been obtained, there can be no assurance that the
Company will be able to retain such insurance or that such insurance would be
sufficient to protect the Company in the event of a major defect in the Cerebral
Oximeter. In the event of an uninsured or inadequately insured products
liability claim based on the performance of the Cerebral Oximeter, the Company's
business, financial condition and results of operations could be adversely
affected. See "Business -- Insurance."
 
DEPENDENCE ON THIRD PARTIES FOR MANUFACTURING AND SUPPLY
 
     The Company is dependent on various suppliers for manufacturing the
components for its Cerebral Oximeter and the related disposable SomaSensor. The
Company believes each component is generally available from several potential
suppliers. However, engaging additional or replacing existing suppliers of
custom-designed components is costly and time consuming. The Company does not
intend to maintain
                                       12
<PAGE>   14
 
significant inventories of components, Cerebral Oximeters or SomaSensors.
Therefore, the Company might incur delays in meeting delivery deadlines in the
event a particular supplier is unable or unwilling to meet the Company's
requirements. The Company would require approximately three to four months to
change SomaSensor suppliers. In addition, the Company does not have direct
control over the activities of its suppliers and is dependent on them for
quality control, capacity, processing technologies and, in required cases,
compliance with FDA GMP regulations. If the Company cannot replace certain
suppliers on a timely basis when necessary, its business, financial condition
and results of operations may be adversely affected. In addition, because the
Company does not have long-term agreements with its suppliers, it may be subject
to unexpected price increases which may adversely affect its profit margins. See
"Business -- Manufacturing."
 
SUBSTANTIAL DILUTION
 
   
     At November 30, 1997, the Company had a net tangible shareholders' equity
of $1.12 per share. A purchaser of Common Shares in this offering will
experience immediate and substantial dilution of $3.62 per share in that the
offering price exceeds the net tangible book value of the Company after giving
effect to the offering. To the extent outstanding options and warrants to
purchase Common Shares are exercised, there will be further dilution to new
investors. See "Dilution."
    
 
POSSIBLE VOLATILITY OF STOCK PRICE
 
     The market price of the Common Shares may be highly volatile. Quarterly
operating results of the Company, changes in general conditions in the economy,
the financial markets, or the medical equipment industry, changes in financial
estimates by securities analysts or failure by the Company to meet such
estimates, litigation involving the Company, actions by governmental agencies or
other developments affecting the Company or its competitors, could cause the
market price of the Common Shares to fluctuate substantially. In particular, the
stock market may experience significant price and volume fluctuations which may
affect the market price of the Common Shares for reasons that are unrelated to
the Company's operating performance and that are beyond the Company's control.
 
BROAD DISCRETION OF MANAGEMENT TO ALLOCATE NET PROCEEDS
 
     The Company intends to use the net proceeds of this offering primarily to
finance its operations, including increased marketing and sales activities,
expanding research and development programs and for other general corporate
purposes, including working capital. The amounts identified for the foregoing
under "Use of Proceeds" in this Prospectus are estimates and the amounts
actually expended for each such purpose and the timing of such expenditures may
vary depending upon numerous factors. Management will retain broad discretion to
determine the allocation of the net proceeds of this offering and the timing of
expenditures.
 
FUTURE SALES OF COMMON SHARES; REGISTRATION RIGHTS; EXERCISE OF OPTIONS AND
WARRANTS
 
     The number of the Company's outstanding Common Shares held by
non-affiliates is large relative to the trading volume of the Common Shares. The
Company is unable to predict the effect that sales of Common Shares may have on
the then prevailing market price of the Common Shares. Any substantial sale of
Common Shares or even the possibility of such sales occurring may have an
adverse effect on the market price of the Common Shares.
 
     As of February 28, 1998, the Company had outstanding options and warrants
to purchase an aggregate of 963,409 Common Shares. The Company has also reserved
up to an additional 475,377 Common Shares for issuance upon exercise of options
which have not yet been granted under the Company's stock option plans. Holders
of such warrants and options are likely to exercise them when, in all
likelihood, the Company could obtain additional capital on terms more favorable
than those provided by the options and warrants. In addition, holders of the
Regulation S Agent Warrants have piggy-back registration rights with respect to
the underlying securities, and the holder of the Representative's Warrants has
demand and piggy-back registration rights with respect to the underlying
securities. Exercise of these registration rights may adversely affect the terms
upon which the Company may obtain additional financing. Further, while its
warrants and options are outstanding,
 
                                       13
<PAGE>   15
 
   
the Company's ability to obtain additional financing on favorable terms may be
adversely affected. See "Description of Capital Stock" and "Underwriting."
    
 
POTENTIAL ANTI-TAKEOVER EFFECT
 
     The Board of Directors has the authority, without further approval of the
Company's shareholders, to issue preferred shares (the "Preferred Shares")
having such rights, preferences and privileges as the Board of Directors may
determine. Any such issuance of Preferred Shares could, under certain
circumstances, have the effect of delaying or preventing a change in control of
the Company and may adversely affect the rights of holders of Common Shares. In
addition, the Company is subject to Michigan statutes regulating business
combinations, takeovers and control share acquisitions which might also hinder
or delay a change in control of the Company. Anti-takeover provisions that could
be included in the Preferred Shares when issued and the Michigan statutes
regulating business combinations, takeovers and control share acquisitions can
have a depressive effect on the market price of the Company's securities and can
limit shareholders' ability to receive a premium on their shares by discouraging
takeover and tender offer bids.
 
     The Directors of the Company serve staggered three-year terms, and
Directors may not be removed without cause. The Company's Restated Articles of
Incorporation also set the minimum and maximum number of directors constituting
the entire Board at three and fifteen, respectively, and require approval of
holders of 90% of the Company's voting shares to amend these provisions. These
provisions could have an anti-takeover effect by making it more difficult to
acquire the Company by means of a tender offer, a proxy contest or otherwise or
the removal of incumbent officers and directors. These provisions could delay,
deter or prevent a tender offer or takeover attempt that a shareholder might
consider in his or her best interests, including those attempts that might
result in a premium over the market price for the Common Shares held by the
Company's shareholders. See "Description of Capital Stock."
 
                                       14
<PAGE>   16
 
                                USE OF PROCEEDS
 
   
     The net proceeds to the Company from the sale of the 2,000,000 Common
Shares offered hereby after deducting the underwriting discounts and commissions
and estimated offering expenses payable by the Company, are estimated to be
approximately $11,320,625 ($13,056,218 if the Underwriters' over-allotment
option is exercised in full), assuming a public offering price of $6.19 per
share.
    
 
     The Company currently intends to use the net proceeds from the sale of the
Common Shares offered hereby to finance the Company's operations, including the
following:
 
   
<TABLE>
<S>                                                           <C>
Increased Marketing and Sales Activities(1).................  $ 2,800,000
Expand Research and Development Programs(2).................      900,000
General Corporate Purposes(3)...............................    7,620,625
                                                              -----------
     Total..................................................  $11,320,625
                                                              ===========
</TABLE>
    
 
- ---------------
(1) Includes the cost of the Company's direct sales force, attendance at trade
    shows and other promotional activities.
 
(2) Includes the development of a Cerebral Oximeter for use on children and
    newborns, enhancements to the SomaSensor and the development of new products
    through its consulting arrangement with NeuroPhysics Corporation.
 
(3) Includes working capital and other ongoing Selling, General and
    Administrative expenses. See the Financial Statements as of, and for the
    year ended, November 30, 1997, included elsewhere in this Prospectus, for
    information about the Company's current working capital needs and ongoing
    Selling, General and Administrative expenses.
 
     The foregoing represents the Company's best estimate of its allocation of
the estimated net proceeds from the sale of Common Shares offered hereby and is
subject to a reapportionment of proceeds among the categories discussed above or
to new categories in response to, among other things, changes in the Company's
business plans, future revenues and expenses and industry, regulatory or
competitive conditions. The amount and timing of expenditures will vary
depending on a number of factors, including changes in the Company's
contemplated operations or business plan and changes in economic and industry
conditions. Any such shifts will be at the discretion of the Board of Directors
and the officers of the Company.
 
     Pending the application of such proceeds, the Company intends to invest the
net proceeds of this offering in short-term, investment-grade, interest-bearing
investments.
 
                                       15
<PAGE>   17
 
                PRICE RANGE OF COMMON SHARES AND DIVIDEND POLICY
 
     The Common Shares trade on The Nasdaq SmallCap Market under the trading
symbol "SMTS." The following table sets forth, for the periods indicated, the
range of high and low closing bid quotations as reported by Nasdaq. The prices
set forth below have been adjusted to give effect to the 1-for-10 reverse stock
split of the Common Shares effected on April 10, 1997.
 
   
<TABLE>
<CAPTION>
                                                               HIGH      LOW
                                                               ----      ---
<S>                                                           <C>       <C>
Fiscal Year Ended November 30, 1996
  First Quarter.............................................  $17.50    $ 4.10
  Second Quarter............................................   25.00     10.00
  Third Quarter.............................................   40.00     14.40
  Fourth Quarter............................................   23.10     12.50
Fiscal Year Ended November 30, 1997
  First Quarter.............................................  $15.00    $ 5.63
  Second Quarter............................................   11.25      3.38
  Third Quarter.............................................    4.19      3.13
  Fourth Quarter............................................    8.13      3.00
Fiscal Year Ending November 30, 1998
  First Quarter.............................................  $ 6.50    $ 4.50
  Second Quarter (through March 6, 1998)....................    6.38      5.50
</TABLE>
    
 
   
     On March 6, 1998 the last reported sales price for the Common Shares on The
Nasdaq SmallCap Market was $6.19 per share. At February 28, 1998, the Company
had 567 shareholders of record.
    
 
     The bid quotations set forth above reflect inter-dealer prices, without
retail markup, mark-down or commission and may not necessarily represent actual
transactions.
 
     The Company has never paid cash dividends on its Common Shares and does not
expect to pay such dividends in the foreseeable future. The Company currently
intends to retain any future earnings for use in the Company's business. The
payment of any future dividends will be determined by the Board in light of the
conditions then existing, including the Company's financial condition and
requirements, future prospects, restrictions in future financing agreements,
business conditions and other factors deemed relevant by the Board.
 
                                       16
<PAGE>   18
 
                                 CAPITALIZATION
 
   
     The following table sets forth the actual capitalization of the Company as
of November 30, 1997 and as adjusted to give effect to the sale of the 2,000,000
Common Shares offered by the Company hereby at an assumed public offering price
of $6.19 and the application of the estimated net proceeds of $11,320,625
therefrom (after deducting underwriting discounts and commissions and estimated
offering expenses) as described in "Use of Proceeds." This table should be read
in conjunction with "Management's Discussion and Analysis of Financial Condition
and Results of Operations" and the Financial Statements and Notes to Financial
Statements included elsewhere in this Prospectus.
    
 
   
<TABLE>
<CAPTION>
                                                               AT NOVEMBER 30, 1997
                                                              ----------------------
                                                               ACTUAL    AS ADJUSTED
                                                               ------    -----------
                                                              (IN THOUSANDS, EXCEPT
                                                                   SHARE DATA)
<S>                                                           <C>        <C>
Shareholders' equity:
  Preferred shares; authorized, 1,000,000 shares of $.01 par
     value; no shares issued or outstanding.................        --          --
  Common shares; authorized, 20,000,000 shares of $.01 par
     value; issued and outstanding, 4,285,334 shares at
     November 30, 1997 (6,285,334 shares, as adjusted)
     (1)....................................................  $     43    $     63
  Additional paid-in capital................................    41,213      52,514
  Accumulated deficit (2)...................................   (36,367)    (36,367)
                                                              --------    --------
     Total shareholders' equity and total capitalization....  $  4,889    $ 16,210
                                                              ========    ========
</TABLE>
    
 
- ---------------
(1) Excludes (i) an aggregate of up to 1,043,872 Common Shares reserved for
    issuance under the Company's 1983 Stock Option Plan, 1991 Incentive Stock
    Option Plan, 1993 Director Stock Option Plan, 1997 Stock Option Plan and
    non-plan options, of which options to purchase an aggregate of 568,495
    Common Shares were outstanding as of February 28, 1998, (ii) 79,394 Common
    Shares issuable upon the exercise of the Regulation S Agent Warrants issued
    in connection with the Regulation S Offerings, (iii) 115,520 Common Shares
    issuable upon the exercise of the Regulation S Warrants issued in connection
    with the Regulation S Offerings completed in July 1995 and April 1996 and
    (iv) 200,000 Common Shares issuable upon exercise of the Representative's
    Warrants issued in connection with the Company's public offering of Common
    Shares which closed in June 1997. See Notes 3 and 8 of Notes to Financial
    Statements.
 
(2) Management believes the accumulated deficit increased during the first
    quarter ended February 28, 1998 and will continue to increase in the second
    quarter ending May 31, 1998, and there has been and will continue to be a
    corresponding decrease in total capitalization.
 
                                       17
<PAGE>   19
 
                                    DILUTION
 
   
     The net tangible book value of the Company as of November 30, 1997 was
$4,816,739, or $1.12 per Common Share. Net tangible book value per share
represents the amount of net tangible assets, less total liabilities, divided by
the number of Common Shares outstanding. After giving effect to the sale by the
Company of 2,000,000 Common Shares offered hereby at an assumed public offering
price of $6.19 per share, the net tangible book value of the Company as of
November 30, 1997 would have been $16,137,364, or $2.57 per share. This
represents an immediate increase in such net tangible book value of $1.45 per
share to existing shareholders and an immediate dilution of $3.62 per share to
new investors. The following table illustrates this per share dilution:
    
 
   
<TABLE>
<S>                                                           <C>     <C>
Assumed public offering price per share.....................          $6.19
  Net tangible book value per share at November 30, 1997....  $1.12
  Increase in net tangible book value per share attributable
     to new investors.......................................   1.45
                                                              -----
Net tangible book value per share after giving effect to
  this offering.............................................           2.57
                                                                      -----
Dilution per share to new investors.........................          $3.62
                                                                      =====
</TABLE>
    
 
     The foregoing assumes no exercise of options and warrants after November
30, 1997. As of February 28, 1998, there were outstanding options and warrants
to purchase an aggregate of 963,409 Common Shares, and the Company had also
reserved up to an additional 475,377 Common Shares for issuance upon the
exercise of options which had not yet been granted under the Company's stock
option plans. To the extent outstanding options or warrants are exercised, there
will be further dilution to new investors. See "Capitalization."
 
                                       18
<PAGE>   20
 
                            SELECTED FINANCIAL DATA
 
     The following selected financial data as of November 30, 1997, 1996, 1995,
1994 and 1993, and for each of the years in the five-year period ended November
30, 1997 have been derived from the audited financial statements of the Company,
certain of which appear elsewhere in this Prospectus together with the report of
Deloitte & Touche LLP, independent auditors, whose report includes an
explanatory paragraph relating to an uncertainty concerning the Company's
ability to continue as a going concern. The selected financial data should be
read in conjunction with the financial statements and notes thereto and with
"Management's Discussion and Analysis of Financial Condition and Results of
Operations" included elsewhere in this Prospectus.
 
   
<TABLE>
<CAPTION>
                                                           FISCAL YEAR ENDED NOVEMBER 30,
                                              --------------------------------------------------------
                                                1997        1996        1995        1994        1993
                                              --------    --------    --------    --------    --------
                                                       (IN THOUSANDS, EXCEPT PER SHARE DATA)
<S>                                           <C>         <C>         <C>         <C>         <C>
STATEMENT OF OPERATIONS DATA:
Net revenues(1)...........................     $ 1,212      $  778     $ 1,336      $  938     $ 1,547
Cost of sales.............................         632         385         658         464         763
Gross margin..............................         580         393         678         474         784
Research, development and engineering
  expenses................................         736         235         286         550       1,150
Selling, general and administrative
  expenses................................       6,238       3,550       3,303       4,347       6,063
Net loss..................................     $(6,155)    $(3,304)    $(2,818)    $(4,332)    $(6,136)
Net loss per Common Share -- Basic and
  Diluted(2)..............................     $ (1.88)    $ (1.77)    $ (1.67)    $ (3.41)    $ (5.75)
Weighted average number of Common Shares
  outstanding(2)..........................       3,272       1,867       1,684       1,270       1,068
</TABLE>
    
 
<TABLE>
<CAPTION>
                                                                  AT NOVEMBER 30,
                                              --------------------------------------------------------
                                                1997        1996        1995        1994        1993
                                              --------    --------    --------    --------    --------
                                                       (IN THOUSANDS, EXCEPT PER SHARE DATA)
<S>                                           <C>         <C>         <C>         <C>         <C>
BALANCE SHEET DATA:
Cash and marketable securities............    $  4,603    $  3,292    $    941    $  2,405    $  2,929
Working capital...........................       4,511       3,862       1,846       2,982       3,326
Total assets..............................       5,677       4,672       2,861       4,327       5,142
Total liabilities.........................         788         618         568         808       1,039
Long-term debt and redeemable Convertible
  Preferred Shares........................          --          --          20          20          60
Accumulated deficit(4)....................     (36,367)    (30,211)    (26,907)    (24,089)    (19,757)
Shareholders' equity(3)(4)................       4,889       4,054       2,294       3,519       4,103
</TABLE>
 
- ---------------
(1) Net revenues recorded in fiscal years 1997, 1996, 1995, 1994 and 1993 relate
    primarily to the sale of Cerebral Oximeters and SomaSensors for commercial
    use. For a description of the current status of the Company's loss of, and
    regaining, FDA clearance to market the Cerebral Oximeter in the United
    States, see "Business -- Government Regulation," and "Management's
    Discussion and Analysis of Financial Condition and Results of
    Operations -- Liquidity and Capital Resources."
 
   
(2) See Note 4 of Notes to Financial Statements included in this Prospectus for
    information with respect to the calculation of per share data. During the
    first quarter of fiscal 1998, the Company adopted SFAS No. 128, "Earnings
    Per Share." The adoption of SFAS No. 128 had no impact on the reported loss
    per share for all periods presented.
    
 
(3) See Statements of Shareholders' Equity of the Financial Statements included
    in this Prospectus for an analysis of Common Share transactions for the
    period from December 1, 1994 through November 30, 1997.
 
(4) Management believes the accumulated deficit increased during the first
    quarter ended February 28, 1998 and will continue to increase in the second
    quarter ending May 31, 1998, and there has been and will continue to be a
    corresponding decrease in total capitalization.
                                       19
<PAGE>   21
 
                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                 FINANCIAL CONDITION AND RESULTS OF OPERATIONS
 
     The following Management's Discussion and Analysis of Financial Condition
and Results of Operations includes forward-looking statements with respect to
the Company's future financial performance. These forward-looking statements are
subject to various risks and uncertainties, including the factors described
under "Risk Factors" and elsewhere in this Prospectus, that could cause actual
results to differ materially from historical results or those currently
anticipated.
 
RESULTS OF OPERATIONS
 
OVERVIEW
 
     Somanetics develops, manufactures and markets the INVOS Cerebral Oximeter,
the only FDA-cleared, non-invasive patient monitoring system that continuously
measures changes in the blood oxygen level in the adult brain. In 1988, the
Company began clinical studies of the Cerebral Oximeter on human patients. In
June 1992, the Company received 510(k) clearance from the FDA to market the
Cerebral Oximeter in the United States for use on adults. The Company began
commercial shipments of Cerebral Oximeters and SomaSensors in May 1993. In
November 1993, the FDA rescinded the Company's clearance to market the Cerebral
Oximeter and the related disposable SomaSensor in the United States, and the
Company suspended all commercial sales. In February 1994, the Company resumed
marketing its product in several foreign countries, and in June 1996 the Company
received clearance from the FDA to market the Cerebral Oximeter and the related
disposable SomaSensor in the United States. In October 1997, the Company
obtained FDA clearance for advances in its INVOS technology that are
incorporated in its new model 4100 Cerebral Oximeter. The new model 4100
Cerebral Oximeter was introduced in October 1997 and became available in the
first quarter of fiscal 1998.
 
     During fiscal 1997, 1996 and 1995, the Company's primary activities
consisted of research and development of the INVOS technology, the Cerebral
Oximeter and the related disposable SomaSensor. The Company recently emerged
from the development stage and had an accumulated deficit of $36,366,536 through
November 30, 1997. The Company believes that its accumulated deficit will
continue to increase for the foreseeable future.
 
     The Company derives its revenues from sales of Cerebral Oximeters and
SomaSensors to its distributors and, since the June 1996 FDA clearance, to
hospitals in the United States through its direct sales employees. The Company
recognizes revenues when it ships its product to its distributors or to
hospitals. Payment terms are generally net 30 days for United States sales and
net 60 days or longer for international sales. The Company's primary expenses,
excluding the cost of its product, are selling, general and administrative and
research, development and engineering, which are generally expensed as incurred.
The Company capitalizes its patent costs and amortizes them over 17 years. Since
May 1994, the Company has exchanged model 3100A Cerebral Oximeters for its model
3100 Cerebral Oximeters. The Company refurbished the model 3100 Cerebral
Oximeters it received and sold them approximately at cost in countries that do
not require compliance with the standards met by the model 3100A. In the first
quarter of 1998, the Company began offering to exchange model 4100 Cerebral
Oximeters for model 3100A Cerebral Oximeters and cash equal to the difference in
sales prices of the two models. Such sales reduce the Company's overall gross
margin.
 
FISCAL YEAR ENDED NOVEMBER 30, 1997 COMPARED TO FISCAL YEAR ENDED NOVEMBER 30,
1996
 
     Net revenues increased approximately $434,000, or 56%, from $778,200 in the
fiscal year ended November 30, 1996 to $1,211,784 in the fiscal year ended
November 30, 1997. The increase in revenues was primarily attributable to an
increase in United States sales for fiscal 1997 of approximately $490,000, from
approximately $33,000 in fiscal 1996 to approximately $523,000 in fiscal 1997.
The sales increase was partially offset by a $56,000 decrease in international
sales in fiscal 1997 compared to fiscal 1996, primarily due to reduced shipments
to Baxter Limited in Japan, which is delaying purchases until shipment of the
new model 4100 Cerebral Oximeter is permitted in Japan, and a 21% decrease in
the average selling price of
                                       20
<PAGE>   22
 
Cerebral Oximeters in fiscal 1997 compared to fiscal 1996 primarily as a result
of lower international prices for the Cerebral Oximeter, partially offset by
increased prices realized by the Company as a result in a change in the mix
between sales directly to hospitals and sales through distributors.
 
     Approximately 57% of the Company's net revenues in fiscal 1997 were export
sales, as compared to approximately 96% in fiscal 1996. Sales of model 3100A
Cerebral Oximeters, SomaSensors, and refurbished model 3100 Cerebral Oximeters
comprised approximately 60%, 30% and 10%, respectively, of the Company's fiscal
year 1997 net revenues, and 63%, 23% and 14%, respectively, of the Company's
fiscal year 1996 net revenues. Two international distributors and one United
States distributor accounted for approximately 28%, 11%, and 12%, respectively,
of net revenues for fiscal year 1997, and two international distributors
accounted for approximately 62% and 15%, respectively, of net revenues for
fiscal year 1996.
 
     Gross margin as a percentage of net revenues for the fiscal years ended
November 30, 1997 and 1996 were approximately 48% and 51%, respectively. Gross
margin as a percentage of net revenues decreased in fiscal 1997 from fiscal 1996
primarily because the Company realized lower average selling prices for model
3100A Cerebral Oximeters in fiscal 1997, the cost to the Company of the
SomaSensor was higher in fiscal 1997, and SomaSensors were a larger portion of
overall sales. This decrease was partially offset by the decrease in the portion
of net revenues attributable to refurbished model 3100 Cerebral Oximeters in
fiscal 1997.
 
     The Company's research, development and engineering expenses increased
approximately $501,000, or 213%, from $235,354 for the fiscal year ended
November 30, 1996 to $736,427 for the fiscal year ended November 30, 1997. The
increase in fiscal 1997 is primarily attributable to increased costs of
development materials and consulting fees in connection with new product
development, principally the new model adult Cerebral Oximeter, increased
clinical testing and an increase in research, development, and engineering
personnel from two employees at November 30, 1996 to five employees at November
30, 1997.
 
     Selling, general and administrative expenses increased approximately
$2,688,000, or 76%, from $3,549,939 for the fiscal year ended November 30, 1996
to $6,238,330 for the fiscal year ended November 30, 1997. The increase for
fiscal 1997 is primarily attributable to (i) a $1,539,000 increase in salaries,
wages, incentive compensation and related expenses as a result of the additional
personnel hired during fiscal 1997 (from 30 employees as of November 30, 1996,
eight of which were hired during the fourth quarter of fiscal 1996, to 40
employees as of November 30, 1997, most of whom were on the payroll for the
entire fiscal 1997), (ii) a $446,000 increase in selling-related expenses
primarily as a result of increased expenses for employee travel, medical
affairs, marketing, clinical research, and sales demonstration equipment use,
and industry trade shows and advertising, (iii) a $280,000 increase in
miscellaneous expense primarily related to inventory obsolescence reserves
recorded during the third and fourth quarters of fiscal 1997, (iv) a $152,000
increase in bad debt expense and (v) a $276,000 increase in other personnel and
office-related expenses, including temporary services, telephone, recruiting and
training, and office supplies.
 
FISCAL YEAR ENDED NOVEMBER 30, 1996 COMPARED TO FISCAL YEAR ENDED NOVEMBER 30,
1995
 
     Net revenues decreased approximately $558,000, or 42%, from $1,335,970 in
the fiscal year ended November 30, 1995 to $778,200 in the fiscal year ended
November 30, 1996. The decrease in revenues was primarily attributable to a more
than 20% decrease in the average selling price of model 3100A Cerebral Oximeters
to distributors and reduced shipments to Europe and to Baxter Limited in Japan.
Approximately 96% and 100% of the Company's net revenues in fiscal 1996 and
1995, respectively, were export sales. Sales of refurbished model 3100 Cerebral
Oximeters, model 3100A Cerebral Oximeters and SomaSensors comprised
approximately 14%, 63% and 23%, respectively, of the Company's fiscal year 1996
net revenues, and 10%, 74% and 16%, respectively, of the Company's fiscal year
1995 net revenues.
 
     Two international distributors accounted for approximately 62% and 15%,
respectively, of net revenues for fiscal year 1996, and approximately 53% and
13%, respectively, of net revenues for fiscal year 1995. The Company terminated
its Japanese distributor effective January 28, 1995. In March 1995, the Company
announced the engagement of Baxter Limited as its exclusive distributor in
Japan. In April 1995, the
 
                                       21
<PAGE>   23
 
Company received its license from the Japanese Ministry of Health and Welfare to
market its product in Japan.
 
     Gross margin as a percentage of net revenues for the fiscal years ended
November 30, 1996 and 1995 were approximately 51% and 51%, respectively. Gross
margin as a percentage of net revenues decreased in fiscal 1996 from fiscal 1995
primarily because 14% of net revenues in fiscal 1996 consisted of sales of
refurbished model 3100 Cerebral Oximeters, and because of lower average selling
prices for model 3100A Cerebral Oximeters and an increase in the cost of the
SomaSensor, partially offset by an approximately 10% decrease in materials cost
for the Cerebral Oximeter in fiscal 1996.
 
     The Company's research, development and engineering expenses decreased
approximately $51,000, or 18%, from $285,893 for the fiscal year ended November
30, 1995 to $235,354 for the fiscal year ended November 30, 1996. The decrease
in fiscal 1996 is primarily attributable to an approximately $70,000 charge in
fiscal 1995 to engineering expenses for obsolete purchased parts inventory
relating to engineering design changes to the model 3100A Cerebral Oximeter,
partially offset by increased consulting fees in fiscal 1996 in connection with
new product development since the Company received 510(k) clearance for the
Cerebral Oximeter.
 
     Selling, general and administrative expenses increased approximately
$247,000, or 7%, from $3,302,751 for the fiscal year ended November 30, 1995 to
$3,549,939 for the fiscal year ended November 30, 1996. The increase for fiscal
1996 is primarily attributable to (i) a $217,000 increase in selling-related
expenses, primarily due to the costs of providing Cerebral Oximeters for
clinical research and to United States sales personnel and the added cost of
promotional equipment and materials in the United States, partially offset by a
decrease in travel and related expenses and two fewer employees in sales and
marketing for approximately seven months of the fiscal year, (ii) one-time
charges of $175,000 for write-downs of excess refurbished model 3100 Cerebral
Oximeters and obsolete inventory, (iii) an increase in non-productive, indirect
labor and overhead of $197,000 and (iv) a $71,000 increase in warranty expenses,
partially offset by (a) a decrease of $237,000 in salaries and wages, primarily
due to a reduction in payroll and related benefits, partially offset by an
increase in temporary and contract labor and an increase in consulting services,
(b) a $134,000 decrease in occupancy costs principally due to the reduction in
personnel and the expiration of operating leases and (c) a decrease in
depreciation and amortization expenses of $67,000.
 
   
     The $121,500 bad debt recovery (resulting from the returns of INVOS 3100
Cerebral Oximeters by United States distributors whose receivables had been
written off), $57,200 reversal of the reserve for the extra cost of exchanging
new INVOS 3100A Cerebral Oximeters for INVOS 3100 Cerebral Oximeters held by
United States distributors who had not yet paid for their Cerebral Oximeters,
and the cost of upgrading model 3100 Cerebral Oximeters, and $27,600 reversal of
the reserve for replacing SomaSensors recalled in 1993, were partially offset by
a $150,000 reserve accrued for excess INVOS 3100 Cerebral Oximeters in inventory
and obsolete inventory and a $46,000 reserve for doubtful accounts taken in
connection with receivables from some foreign distributors. These amounts are
included in selling, general and administrative expenses for fiscal 1996.
    
 
EFFECTS OF INFLATION
 
     The Company does not believe that inflation has had a significant impact on
its financial position or results of operations in the past three years.
 
LIQUIDITY AND CAPITAL RESOURCES
 
     Net cash used in operations during fiscal 1997 was approximately
$5,436,000. Cash was used primarily to fund the Company's net loss, including
selling, general and administrative expenses and research, development and
engineering expenses (approximately $6,105,000, net of depreciation and
amortization expense). This primary use of cash was partially offset by a
decrease in net inventory (approximately $498,000) due to management's decision
to lower inventory levels of INVOS 3100A Cerebral Oximeters and its components
to prepare for the introduction of the new model 4100 Cerebral Oximeter and
increased inventory obsolescence recorded in the third and fourth quarters of
fiscal 1997 in anticipation of the new product launch, and an
                                       22
<PAGE>   24
 
increase in accrued liabilities (approximately $144,000) as of the end of fiscal
1997. Accounts receivable increased only $262. Higher sales were substantially
offset by increased allowances for doubtful accounts. Accounts payable increased
$26,462. The Company used some of the proceeds of its public offering of Common
Shares, which closed on June 4, 1997, to pay previously delayed balances due
vendors; however, as of November 30, 1997 payables were increasing due to
inventory purchases related to the beginning of production of the Company's new
model 4100 Cerebral Oximeter. Capital expenditures in fiscal 1997 were
approximately $244,000, primarily for tooling to manufacture the new model 4100
Cerebral Oximeter.
 
     The Company's principal sources of operating funds have been the proceeds
of equity investments from sales of the Company's Common Shares. See Statements
of Shareholders' Equity of the Company's Financial Statements included elsewhere
in this Prospectus. On June 4, 1997, the Company closed the public offering of
2,000,000 newly-issued Common Shares, at a price of $4.00 per share, for gross
proceeds of $8,000,000, through an offering underwritten by Brean Murray & Co.,
Inc. The net proceeds to the Company, after deducting the underwriting discount
and expenses of the offering, were approximately $7,000,000.
 
     As of November 30, 1997 the Company had working capital of $4,510,973,
cash, cash equivalents and marketable securities of $4,603,156, total current
liabilities of $788,476 and shareholders' equity of $4,888,956.
 
     The Company expects that its primary needs for liquidity in fiscal 1998
will be (i) to fund its losses and sustain its operations, including funding (a)
marketing costs for the Cerebral Oximeter; (b) additional sales and marketing,
manufacturing, service, quality control and medical affairs personnel expected
to be hired in fiscal 1998; (c) further development and testing of enhancements
to the SomaSensor, and product extensions of the Cerebral Oximeter; and (d)
additional research and development projects and (ii) for working capital,
including increased accounts receivable and inventories of components and sales
units to satisfy expected sales orders. In addition, management has budgeted
approximately $370,000 for capital expenditures during fiscal 1998, primarily
for demonstration units of its new model 4100 Cerebral Oximeter.
 
     The Company believes that the cash, cash equivalents and marketable
securities on hand at November 30, 1997 together with the net proceeds of this
offering will be sufficient to sustain the Company's operations at budgeted
levels and its needs for liquidity into the year 2000. By that time the Company
will be required to raise additional cash either (i) through additional sales of
its product, (ii) through sales of securities, (iii) by incurring indebtedness
or (iv) by some combination of the foregoing. If the Company is unable to raise
additional cash by that time, it will be required to reduce or discontinue its
operations.
 
     The estimated length of time current cash, cash equivalents and marketable
securities will sustain the Company's operations is based on certain estimates
and assumptions made by the Company. Such estimates and assumptions are subject
to change as a result of actual experience. There can be no assurance that
actual capital requirements necessary to market the Cerebral Oximeter and
SomaSensor, to develop enhancements to the SomaSensor, and product extensions of
the Cerebral Oximeter, to conduct research and development concerning additional
potential applications of the Company's technology and for working capital will
not be substantially greater than current estimates.
 
     The Company does not believe that product sales will be sufficient to fund
the Company's operations in fiscal 1998. There can be no assurance that the
Company will be able to achieve the level of sales necessary to sustain its
operations. The report of the Company's Independent Auditors contains an
explanatory paragraph relating to the uncertainty concerning the Company's
ability to continue as a going concern. See "Independent Auditors Report"
accompanying the Financial Statements included elsewhere in this Prospectus.
 
     As of November 30, 1997, there were 60,400 redeemable warrants outstanding,
exercisable at $20.00 per share until July 13, 2000, and 55,120 redeemable
warrants outstanding exercisable at $17.50 per share until April 1, 2001. These
warrants were issued in the Company's 1995 and April 1996 Regulation S
Offerings. The conditions permitting the Company to redeem these warrants have
not been met as of February 28, 1998. In addition, the placement agents and
their transferees hold warrants to purchase 64,394 Common Shares exercisable at
$12.50 per share and 15,000 warrants exercisable at $14.40 per share. Also, the
underwriter of
 
                                       23
<PAGE>   25
 
the 1997 public offering received warrants to purchase 200,000 Common Shares
exercisable at $4.80 per share. It is unlikely that these warrants will be
exercised if the exercise price exceeds the market price of the Common Shares.
 
     The Company has no loan commitments.
 
     The Company's ability to use its accumulated net operating loss
carryforwards to offset future income, if any, for income tax purposes, is
limited due to the initial public offering of its securities in March 1991. See
Note 6 of Notes to Financial Statements included elsewhere in this Prospectus.
 
YEAR 2000 COMPLIANCE
 
     The Company does not expect the cost of converting its computer systems to
year 2000 compliance will be material to its financial condition or results of
operations. The Company believes that it will be able to achieve year 2000
compliance by the end of 1999, and does not currently anticipate any disruption
in its operations as the result of any failure by the Company to be in
compliance. The Company does not currently have any information concerning the
year 2000 compliance status of its suppliers and customers.
 
NEW ACCOUNTING PRONOUNCEMENTS
 
   
     In March 1997, the Financial Accounting Standards Board ("FASB") issued
SFAS No. 128, "Earnings per Share." This Statement establishes standards for
computing and presenting earnings per share ("EPS") and applies to all entities
with publicly-held common shares or potential common shares. This Statement
replaces the presentation of primary EPS and fully-diluted EPS with a
presentation of basic EPS and diluted EPS, respectively. Basic EPS excludes
dilution and is computed by dividing earnings available to common shareholders
by the weighted-average number of common shares outstanding for the period.
Similar to fully diluted EPS, diluted EPS reflects the potential dilution of
securities that could share in the earnings. During the first quarter of fiscal
1998, the Company adopted SFAS No. 128. The adoption of SFAS No. 128 had no
impact on the reported loss per share for all periods presented.
    
 
     In June 1997, the FASB issued SFAS No. 130, "Reporting Comprehensive
Income," which is effective for fiscal years beginning after December 15, 1997.
This Statement establishes standards for reporting and display of comprehensive
income and its components in financial statements. The Statement is effective
for the Company's financial statements for the year ending November 30, 1999.
 
     In June 1997, the FASB issued SFAS No. 131, "Disclosures about Segments of
an Enterprise and Related Information," which is effective for fiscal years
beginning after December 15, 1997. This statement establishes standards for the
way a public business enterprise reports certain information about operating
segments, and discloses enterprise-wide information about the company's products
and services, activities in different geographic areas, and the company's
reliance on major customers. The statement is effective for the Company's
financial statements for the year ending November 30, 1999.
 
                                       24
<PAGE>   26
 
                                    BUSINESS
 
THE COMPANY
 
     Somanetics develops, manufactures and markets the Cerebral Oximeter, the
only FDA-cleared, non-invasive patient monitoring system that continuously
measures changes in the blood oxygen level in the adult brain. The Cerebral
Oximeter was developed to meet the need for information about oxygen in the
brain, the organ least tolerant of oxygen deprivation. Brain oxygen information,
therefore, is important, especially in surgical procedures requiring general
anesthesia and in other critical care situations with a high risk of brain
oxygen imbalances. The Company targets surgical procedures with a high risk of
brain oxygen imbalances, such as cardiovascular and vascular surgeries and
surgeries on elderly patients involving abnormal blood pressure. Surgeons,
anesthesiologists and other medical professionals use the Cerebral Oximeter to
identify brain oxygen imbalances and take corrective action, potentially
improving patient outcome and reducing the cost of care.
 
     The Cerebral Oximeter is a relatively inexpensive, portable and easy-to-use
monitoring system placed at a patient's bedside in hospital critical care areas,
especially operating rooms, recovery rooms, ICUs and emergency rooms. It is
comprised of (i) a portable unit including a computer and a display monitor,
(ii) dual single-use, disposable sensors, the SomaSensors, (iii) proprietary
software and (iv) a preamplifier cable. SomaSensors can be adhered to both sides
of a patient's forehead to offer bi-lateral monitoring and are connected to the
computer through the preamplifier cable. The computer uses the Company's
proprietary software to analyze information received from the SomaSensor and
provides a continuous digital and trend display on the monitor of an index of
the oxygen saturation in the area of the brain under the SomaSensor. Users of
the Cerebral Oximeter will be required to purchase disposable SomaSensors on a
regular basis because of their single-use nature.
 
     In October 1997, the Company obtained FDA clearance for advances in its
INVOS technology that are incorporated in its new model INVOS 4100 Cerebral
Oximeter. The new model 4100 Cerebral Oximeter was introduced in October 1997 at
two industry trade shows and became available in the first quarter of fiscal
1998. The Company's objective is to establish the Cerebral Oximeter as a
"standard of care" in surgical procedures requiring general anesthesia and in
other critical care situations.
 
   
RECENT DEVELOPMENTS
    
 
   
     The Company has announced its unaudited first quarter results. Net revenues
for the first fiscal quarter ended February 28, 1998 were $803,365 from sales of
its Cerebral Oximeter and disposable SomaSensor. This represents a 127% increase
over net revenues of $353,863 for the same period in 1997. For the first quarter
of fiscal 1998, the Company reported a net loss of $1,173,100, or 27 cents per
Common Share -- basic and diluted, compared to a net loss of $1,308,412, or 57
cents per Common Share -- basic and diluted, for the same period of 1997. The
net loss decrease is primarily attributable to increased sales, partially offset
by increased selling, general and administrative expenses. The decrease in net
loss per Common Share -- basic and diluted is primarily attributable to an
increase in the weighted average number of Common Shares outstanding.
    
 
MARKET OVERVIEW
 
INDUSTRY BACKGROUND
 
     The brain is the human organ least tolerant of oxygen deprivation. Without
sufficient oxygen, brain damage may occur within a few minutes, which can result
in paralysis, severe and complex disabilities or death. Undetected brain hypoxia
(insufficiency of oxygen delivery) and ischemia (tissue oxygen starvation due to
the obstruction of the inflow of arterial blood) are common causes of brain
damage and death during and after many surgical procedures and in other critical
care situations. A December 1996 article in The New England Journal of Medicine
reported on a 24-institution study and concluded that adverse cerebral outcomes
after coronary artery bypass graft surgery are relatively common and serious and
are associated with substantial increases in death, length of hospitalization
and use of intermediate- or long-term care facilities.
 
                                       25
<PAGE>   27
 
Adverse cerebral outcomes occurred in 6.1% of the patients included in the
study. Additional studies have estimated that a higher percentage of patients
experience some neurological decline after heart surgery and that insufficiency
of oxygen delivery to the brain is a frequent cause of this problem. The New
England Journal article concluded that new diagnostic and therapeutic strategies
must be developed to lessen such injury.
 
     Oxygen is carried to the brain by hemoglobin in the blood. Hemoglobin
passes through the lungs, bonds with oxygen and is pumped by the heart through
arteries and capillaries to the brain. Brain cells extract the oxygen and the
blood carries away carbon dioxide through the capillaries and veins back to the
lungs. Brain oxygen imbalances can be caused by several factors, including
changes in oxygen saturation (the percentage of hemoglobin contained in a given
amount of blood which carries oxygen) in the arteries, blood flow to the brain,
hemoglobin concentration and oxygen consumption by the brain.
 
     Brain oxygen information is important in surgical procedures requiring
general anesthesia, in other critical care situations with a high risk of brain
oxygen imbalances, as well as in the treatment of patients with head injuries or
strokes. These procedures include cardiovascular and vascular surgeries,
surgeries on elderly patients involving abnormal blood pressure, any
neurosurgery, major surgeries involving the neck, transplant surgeries and
treatments of patients with diseases resulting from high blood pressure, lung
problems, or head, organ or heart injuries and treatment of patients suffering
from strokes. These patients are most commonly found in operating rooms as well
as in the other critical care areas of hospitals, especially recovery rooms,
ICUs and emergency rooms. The Company believes that medical professionals need
immediate and continuous information about changes in the oxygen levels in the
blood in the brain to identify brain oxygen imbalances. After they are alerted
to such imbalances, medical professionals have the information to take
corrective action through the introduction of medications, anesthetic agents or
mechanical intervention, potentially improving patient outcome and reducing the
costs of care. Immediate and continuous information about changes in brain
oxygen levels also provides immediate feedback regarding the adequacy of the
selected therapy. Equally important, without information about brain oxygen
levels, therapy that may not be necessary might be initiated to assure adequate
brain oxygen levels. Unnecessary therapy can have an adverse impact on patient
safety and increase hospital costs.
 
     An independent industry report estimates that there are approximately
62,000 operating rooms worldwide performing approximately 48 million surgeries
involving general anesthesia every year. Industry sources estimate that, in
1993, there were more than 4.4 million surgeries involving the heart or the
blood vessels around the heart in the United States. Such surgeries include more
than 600,000 open heart surgeries and 89,000 endarterectomies (the removal of
blockage in the artery). Industry sources estimate, based on a 1985 survey, that
there were more than 26,800 operating rooms in the United States and, based on a
1993 survey, that there were more than 6,100 ICUs in the United States with more
than 90,000 beds.
 
     Currently, several different methods are used to detect one or more of the
factors affecting brain oxygen levels or the effects of brain oxygen imbalances.
These methods include invasive jugular bulb catheter monitoring, transcranial
Doppler, electroencephalograms ("EEG"), intracranial pressure monitoring and
neurological examination. These methods have not been widely adopted to monitor
brain oxygen levels in critical care situations for a variety of reasons. The
use of any of these methods is limited because it is either expensive, difficult
or impractical to use as a brain monitor, invasive, not available under certain
circumstances (such as when the patient is unconscious or has suppressed neural
activity), not able to measure all of the factors that may affect brain oxygen
imbalances, not organ specific, not able to provide continuous information or
able to measure only the effects of brain oxygen imbalances.
 
     Arterial oxygen saturation is only one of the factors that can affect
oxygen imbalances in the brain. Pulse oximetry measures oxygen saturation in the
arteries. It is non-invasive, uses optical spectroscopy and has become a
standard of care for measuring arterial oxygen saturation in critical care
situations. However, pulse oximeters require a strong pulse, making them
unavailable during bypass surgeries, surgeries involving induced hypothermia or
any other time the patient does not have a strong peripheral pulse. Pulse
oximeters provide information about the oxygen saturation of the arteries in a
finger or earlobe, not oxygen imbalances in the brain. Changes in the oxygen
balance in the brain may not have any affect on the oxygen levels in a finger or
 
                                       26
<PAGE>   28
 
earlobe. For example, a blocked artery to the brain would affect oxygen in the
brain, but would not affect the amount of oxygen in the arteries in the finger.
 
     The Cerebral Oximeter is the only FDA-cleared, non-invasive monitoring
system that provides continuous information about changes in the blood oxygen
level in the adult brain. It is easy to use and relatively inexpensive and
provides medical professionals with new information to help them identify brain
oxygen imbalances. This information may facilitate timely intervention, provide
feedback regarding the adequacy of the selected therapy and provide medical
professionals with additional assurance when they make decisions regarding the
need for therapy, thereby potentially improving patient outcome and reducing the
cost of care.
 
MARKET TRENDS
 
     The Company believes the market for its product is driven by the following
market trends:
 
     Demand to Reduce Health Care Costs. Hospitals in the United States are
increasingly faced with direct economic incentives to control health care costs
and improve the efficiency of health care through improved labor productivity,
shortened hospital stays and more selective performance of medical procedures
and use of facilities and equipment. Hospitals often receive a fixed fee from
Medicare, managed care organizations and private insurers based on the disease
diagnosed, rather than based on the services actually performed. Therefore,
hospitals are increasingly focused on avoiding unexpected costs, such as those
associated with increased hospital stays resulting from patients with brain
damage or other adverse outcomes following surgery. This focus on avoiding
unexpected costs is especially pronounced in the operating room and other
hospital critical care areas due to their high operating costs. The economic and
human costs of brain damage can be tremendous. Even short extensions of hospital
stays resulting from brain damage can be expensive. In addition, overtreating a
patient as a result of lack of knowledge about brain oxygen levels can result in
unnecessary costs.
 
     Organ-Specific Monitoring; Current Emphasis on the Brain. The Company
believes that physicians and hospitals are increasingly interested in monitoring
the status of specific organs in the body, especially the brain. It also
believes there is an increased interest in understanding how the brain functions
and in finding ways to prevent injury to, and cures to diseases affecting, the
brain. The Company believes that this interest has led to a greater focus on
monitoring the brain, both to determine how it functions and to monitor the
effects of various actions on the brain.
 
     Less Invasive Medical Procedures. The Company believes there is a trend
toward less invasive medical procedures. Notable examples include laparoscopic
procedures in general surgery and arthroscopic procedures in orthopedic surgery.
Such procedures are designed to reduce trauma, thereby decreasing complications,
reducing pain and suffering, speeding recovery and decreasing costs associated
with patient care. The Company also believes that there is a trend to minimize
invasive procedures relating to the brain to increase the safety of patients and
medical professionals, reduce recovery time and minimize costs.
 
     Aging Population. According to the Administration on Aging, United States
Department of Health and Human Services, 33.5 million persons in the United
States were age 65 or older in 1995, representing 13% of the population. The
number of Americans age 65 or older increased by approximately 2.3 million, or
7%, between 1990 and 1995, compared to an increase of 5% for the under-65
population. The Administration on Aging predicts that the number of Americans
age 65 or older will increase to approximately 34.7 million by the year 2000 and
to 53.2 million by the year 2020. The Company believes that older patients
require a higher level of medical care using more procedures in which the
patient or the procedure involves a risk of brain oxygen imbalances. Medical and
surgical procedure growth rate has remained steady recently, and industry
analysts expect this trend to continue.
 
                                       27
<PAGE>   29
 
BUSINESS STRATEGY
 
     The Company's objective is to establish the Cerebral Oximeter as a
"standard of care" in surgical procedures requiring general anesthesia and in
other critical care situations. Key elements of the Company's strategy are as
follows:
 
     Target Surgical Procedures With a High Risk of Brain Oxygen Imbalances. The
Company targets surgical procedures with a high risk of brain oxygen imbalances,
such as cardiovascular and vascular surgeries and surgeries on elderly patients
involving abnormal blood pressure. The Company believes that the medical
professionals involved in these surgeries are the most aware of the risks of
brain damage resulting from brain oxygen imbalances. Therefore, the Company
believes that it will be easier to demonstrate the clinical benefits of the
Cerebral Oximeter and potentially gain market acceptance for its product in
connection with these surgeries.
 
     Demonstrate Clinical Benefits and Promote Acceptance of the Cerebral
Oximeter. The Company sponsors clinical studies using the Cerebral Oximeter to
provide additional evidence of its benefits. The resulting publication of any
favorable peer-reviewed papers is used to help convince the medical community of
the clinical benefits of the Cerebral Oximeter. The Company also promotes
acceptance of the Cerebral Oximeter in the medical community by encouraging
surgeons, anesthesiologists and nurses in leading hospitals, whose opinions and
practices the Company believes are valued by other hospitals and physicians, to
use the Cerebral Oximeter on a trial basis. The Company believes that successful
evaluations of the Cerebral Oximeter by these medical professionals will
accelerate the acceptance of the Cerebral Oximeter by other medical
professionals. The Company is sponsoring discussions among physicians who have
used the Cerebral Oximeter about its clinical benefits.
 
     Expand Marketing and Sales Activities. The Company has recently established
a distribution network consisting of its direct sales employees and
distributors. The Company is expanding its marketing and sales efforts to
increase the medical community's exposure to its INVOS technology and the
Cerebral Oximeter, including increased participation in trade shows and medical
conferences and increased product evaluations. The Company is aggressively
marketing its product through its existing sales force and leverages its sales
resources through the use of its distributors, including Baxter Limited in
Japan.
 
     Develop Additional Applications of the Cerebral Oximeter. The Company is in
the process of developing product-line extensions of the Cerebral Oximeter for
use on children and newborns. The Company believes that these natural extensions
of its existing product will increase the market for the Cerebral Oximeter
without the more significant development efforts required for entirely new
products. Research being conducted on children and newborns is expected to
result in a SomaSensor that can fit smaller heads. The Company believes that
non-invasive monitoring is especially important in this patient population, as
they generally have lower oxygen reserves than adults, have less blood volume
from which to make invasive blood gas measurements and are less tolerant of
painful skin punctures and infections.
 
     License its Technology to Medical Device Manufacturers. The Company plans
to license its Cerebral Oximeter technology to other medical device
manufacturers to expand the installed base of Cerebral Oximeters and increase
the demand for SomaSensors. Such a license might be made to a company interested
in incorporating the Cerebral Oximeter into a multi-function monitor. The
Company believes that such an arrangement could provide another distribution
channel for the Company's Cerebral Oximeter. The Company, however, has no
current commitments for any such licenses.
 
     In addition, the Company is analyzing the feasibility of other applications
of its technology. The Company has a consulting arrangement with NeuroPhysics
Corporation in connection with research into the feasibility of four new
products. See "-- Research and Development."
 
                                       28
<PAGE>   30
 
PRODUCT AND TECHNOLOGY
 
THE CEREBRAL OXIMETER
 
     The Company's Cerebral Oximeter is the only FDA-cleared, non-invasive
patient monitoring system that provides continuous information about changes in
the blood oxygen level in the adult brain. It is a portable and easy-to-use
monitoring system that is placed at a patient's bedside in hospital critical
care areas, especially operating rooms, recovery rooms, ICUs and emergency
rooms. Surgeons, anesthesiologists and other medical professionals use the
information provided by the Cerebral Oximeter to identify brain oxygen
imbalances and take corrective action, potentially improving patient outcome and
reducing the cost of care. Once the cause of a cerebral oxygen imbalance is
identified and therapy is initiated, the Cerebral Oximeter provides immediate
feedback regarding the adequacy of the selected therapy. It can also provide
medical professionals with an additional level of assurance when they make
decisions regarding the need for therapy.
 
     Unlike certain existing monitoring methods, the Cerebral Oximeter functions
even when the patient is unconscious, lacks a strong peripheral pulse or has
suppressed neural activity. The measurement made by the Cerebral Oximeter is
dominated by the blood in the veins. Therefore, it responds to the changes in
factors that affect the balance between cerebral oxygen supply and demand,
including changes in arterial oxygen saturation, cerebral blood flow, hemoglobin
concentration and cerebral oxygen consumption. The Cerebral Oximeter responds to
global changes in brain oxygen levels and to events that effect the brain oxygen
levels in the region beneath the SomaSensor.
 
     The Cerebral Oximeter monitoring system is comprised of (i) a portable unit
including a computer and a display monitor, (ii) dual single-use, disposable
sensors, the SomaSensors, (iii) proprietary software and (iv) a preamplifier
cable. SomaSensors can be adhered to both sides of a patient's forehead to offer
bi-lateral monitoring and are connected to the computer through the preamplifier
cable. The SomaSensor continuously transmits and receives predetermined
wavelengths of light sent through the scalp, muscle and skull into the brain
tissue. The computer receives the information about the intensity of the light
scattered by the blood and tissue in the area being monitored. The computer uses
the Company's proprietary software to analyze this information and provide a
continuous digital and trend display on the monitor of an index of the oxygen
saturation in the area of the brain under the SomaSensor.
 
     The portable unit includes a menu driven user interface which provides easy
access for setting high and low audible alarms and permits a customized display
format and data retrieval. Single-function keys offer a convenient means of
powering the Cerebral Oximeter, silencing alarms, marking important events and
printing results that can be stored for up to 24 hours and retrieved by a
variety of standard, commercially available printers. The new model 4100
Cerebral Oximeter measures approximately 9 inches wide, 8 inches high and 8
inches deep and weighs approximately 15 pounds.
 
     The suggested list prices for the new model 4100 Cerebral Oximeter and the
SomaSensor in the United States are $11,995 and $35, respectively. Users of the
Cerebral Oximeter will be required to purchase disposable SomaSensors on a
regular basis. The SomaSensor may only be used once because after one use it may
become contaminated and its effectiveness is not warranted by the Company. The
Company provides a one-year warranty on the Cerebral Oximeter, which the Company
will satisfy by repairing or exchanging those units in need of repair. The
Company also expects to offer maintenance agreements and service for the
Cerebral Oximeter for a fee after the warranty expires.
 
                                       29
<PAGE>   31
 
     The following table summarizes the principal features and related benefits
of the Cerebral Oximeter:
 
<TABLE>
<CAPTION>
 
                      FEATURES                                             BENEFITS
    ------------------------------------------------------------------------------------------------------
<S> <C>                                              <C>                                                   
    FDA-cleared                                      -  Access to United States and certain foreign
                                                        markets
    ------------------------------------------------------------------------------------------------------
    Non-invasive                                     -  Consistent with market trend toward less invasive
                                                        medical procedures
                                                     -  No risk to patients and medical professionals
                                                     -  No added patient recovery costs
    ------------------------------------------------------------------------------------------------------
    Continuous Information                           -  Immediate information regarding brain oxygen
                                                        imbalances
                                                     -  Real-time guide to therapeutic interventions
    ------------------------------------------------------------------------------------------------------
    New Organ-Specific Information                   -  Provides information about oxygen imbalances in
                                                        both sides of the brain
    ------------------------------------------------------------------------------------------------------
    Relatively Inexpensive                           -  Low cost relative to other brain monitors and
                                                        medical devices
                                                     -  Small portion of the cost of the procedures in
                                                        which it is used
                                                     -  New information can potentially improve patient
                                                        outcome and reduce the cost of care
    ------------------------------------------------------------------------------------------------------
    Easy-to-Use                                      -  Does not require a trained technician to operate
                                                        or interpret
                                                     -  Automatic SomaSensor calibration
                                                     -  Simple user interface and controls
                                                     -  Audible alarm limits
    ------------------------------------------------------------------------------------------------------
    Effective in Difficult Circumstances             -  Provides information when the patient is
                                                        unconscious, lacks a strong peripheral pulse or has
                                                        suppressed neural activity, specifically during
                                                        cardiac arrest, hypothermia, hypertension,
                                                        hypotension and hypovolemia
                                                     -  Indicates oxygen imbalances in the brain, not just
                                                        blood flow, oxygenation of the arteries or the
                                                        effects of imbalances
    ------------------------------------------------------------------------------------------------------
    Portable                                         -  Placed at patient's bedside
    ------------------------------------------------------------------------------------------------------
- --------------------------------------------------------------------------------------------------------------
</TABLE>
 
OPTICAL SPECTROSCOPY TECHNOLOGY
 
     The Company's proprietary In Vivo Optical Spectroscopy ("INVOS") technology
is based primarily on the physics of optical spectroscopy. Optical spectroscopy
is the interpretation of the interaction between matter and light. Spectrometers
and spectrophotometers function primarily by shining light through matter and
measuring the extent to which such light is transmitted through, or scattered or
absorbed by, matter. Physicians and scientists can use spectrophotometers to
examine human blood and tissue. Although most human tissue is opaque to ordinary
light, certain wavelengths penetrate tissue more easily than others. Therefore,
by shining light of appropriate wavelengths into the body and measuring its
transmission, scattering and absorption, or a combination, physicians can obtain
information about the matter under analysis. Optical spectroscopy generates no
ionizing radiation and produces no known hazardous effects.
 
     Optical spectroscopy was first used clinically in the 1940s at the
Sloan-Kettering Institute for cancer research. The pulse oximeter uses optical
spectroscopy to determine the oxygen saturation of the blood in the arteries in
peripheral tissue, such as in a finger or an earlobe. By identifying the
hemoglobin and the oxygenated hemoglobin and measuring the relative amounts of
each, oxygen saturation of hemoglobin can be measured. However, the use of
optical spectroscopy in the body has not generally been useful when the
substances to be measured are surrounded by, are behind, or are near bone,
muscle or other tissue, because the transmission, scattering and absorption of
the transmitted light produces extraneous data that interferes with analysis of
the data from the area being examined.
 
                                       30
<PAGE>   32
 
INVOS TECHNOLOGY
 
   
     The Cerebral Oximeter is based on INVOS technology. In 1982, the Company
commenced research and development efforts in connection with a spectroscopic
instrument for the measurement of breast tissue abnormalities. The Company's
first product, the Somanetics INVOS 2100 System (the "INVOS 2100"), used the
same INVOS technology as the Cerebral Oximeter. Subsequently, the Company
commenced analysis of the application of INVOS technology to the measurement of
changes in cellular metabolism in the brain. Early studies conducted in
conjunction with the Henry Ford Neurosurgical Institute demonstrated the ability
of the Company's INVOS technology to make certain measurements which were highly
correlated to controlled changes in animal brain cell metabolism. In 1988, the
Company began clinical studies of the Cerebral Oximeter on human patients in
operating rooms, emergency rooms and ICUs at Henry Ford Hospital and later at
Bowman Gray School of Medicine and Mount Sinai Medical Center.
    
 
   
     Like other applications of optical spectroscopy, INVOS technology also
analyzes various characteristics of human blood and tissue by measuring and
analyzing low-intensity visible and near-infrared light transmitted into
portions of the body. It measures the composition of substances by detecting the
effect they have on light. The INVOS technology measurement is made by
transmitting low-intensity visible and near-infrared light through a portion of
the body and detecting the manner in which the molecules of the exposed
substance interact with light at specific wavelengths. INVOS technology detects
this interaction by measuring the intensity of the various wavelengths of light
received by light sensors. By measuring the effect on specific wavelengths of
light caused by oxygenated hemoglobin contained in blood in the region of the
brain being monitored, the Cerebral Oximeter can monitor changes in the
approximate oxygen saturation of the hemoglobin in such region of the brain.
    

                 [PICTURE OF PATENTED DUAL DETECTOR SOMASENSOR [R]]

 
     The Company has developed a method of reducing extraneous spectroscopic
data caused by surrounding bone, muscle and other tissue. This method allows
data to be gathered from areas of the body which previously could not be
analyzed using optical spectroscopy. The dual detector design of the SomaSensor
enables the measurement of scattered light intensities from the intermediate
tissues of skin, muscle and skull in a separate process. As illustrated above,
the depth of penetration of the light signal is related to the distance between
the light source and the shallow and deep detectors. While both detectors
receive similar information about the tissue outside the brain, the detector
further from the signal source receives more information specific to the brain
than does the detector closer to the light source. By subtracting the two
measurements, INVOS
 
                                       31
<PAGE>   33
 
technology is able to suppress the influence of the tissues outside the brain to
provide a measurement of changes in brain oxygen saturation.
 
RESEARCH AND DEVELOPMENT
 
     The Company is currently focusing its research and development efforts on
product-line extensions of the Cerebral Oximeter for use on children and
newborns and enhancements to the SomaSensor. The Company is currently sponsoring
clinical studies of the Cerebral Oximeter for use on children and newborns, and
is redesigning the SomaSensor for use on smaller heads. The Company believes
that non-invasive monitoring is especially important in this patient population,
as they generally have lower oxygen reserves than adults, have less blood volume
from which to make invasive blood gas measurements and are less tolerant of
painful skin punctures and infections.
 
     In addition to the Company's internal research and development activities,
the Company has entered into a consulting arrangement with NeuroPhysics
Corporation pursuant to which the Company is funding a portion of NeuroPhysics'
research into the feasibility and development of prototypes of four new
products. The United States government is also funding a portion of the research
pursuant to two research grants. NeuroPhysics has granted the Company certain
ownership and commercialization rights in the new products, subject to the
rights of the United States government and royalties payable to NeuroPhysics.
The new products are intended to be non-invasive, in vivo, near-infrared
spectroscopy devices that (i) monitor liver oxygenation for assessing and
controlling hemorrhagic shock (shock resulting from loss of blood), (ii) locate
and assess subdural hematomas (bleeding between the brain and the skull) in head
trauma patients, (iii) monitor certain blood gasses and (iv) monitor fetal
cerebral blood oxygenation during labor and delivery.
 
     In October 1997, NeuroPhysics Corporation was awarded a $746,000 Phase II
contract from the National Institute of Neurological Disorders and Stroke of the
National Institutes of Health. This award follows the completion of a Phase I
contract during which NeuroPhysics demonstrated the conceptual feasibility of
its non-invasive method for monitoring fetal cerebral oxygen during labor and
delivery. The Phase II award will be used to continue the development of this
technology, assemble a prototype fetal cerebral oximeter based on the new
method, and conduct animal and human studies. If Phase II is successful, it is
expected to be followed by the development of a product and clinical trials in
Phase III.
 
     During fiscal years 1997, 1996 and 1995, the Company spent $736,427,
$235,354 and $285,893, respectively, on research, development and engineering.
 
MARKETING, SALES AND DISTRIBUTION
 
MARKETING
 
     The Cerebral Oximeter is for use on patients at risk of brain oxygen
imbalances. These patients are most commonly found in operating rooms amongst
those undergoing general anesthesia for various surgical procedures as well as
in the other critical care areas of hospitals, especially recovery rooms, ICUs
and emergency rooms. After the Cerebral Oximeter is accepted in hospitals,
future markets might include free-standing operating rooms, clinics, ambulances
and nursing homes.
 
     The Company markets the Cerebral Oximeter primarily to cardiovascular and
vascular surgeons, neurosurgeons and anesthesiologists. The Company believes
that these specialists are the medical professionals most aware of the risks of
brain damage resulting from brain oxygen imbalances. The Company and its
distributors have concentrated their sales efforts on the major teaching
hospitals in the United States and selected foreign markets in which the Company
has commenced commercial sales and on other large United States hospitals,
especially those the Company considers opinion leaders. Product evaluations have
already begun at over 200 teaching and other hospitals. In addition, the Company
is sponsoring discussions among physicians who have used the Cerebral Oximeter
about its clinical benefits.
 
     The Company believes that favorable peer review is a key element to a
product's success in the medical equipment industry. Accordingly, the Company
supports clinical research programs with third-party clinicians and researchers
intended to demonstrate the need for, and clinical benefits of, the Cerebral
Oximeter with the
                                       32
<PAGE>   34
 
specific objective of publishing the results in peer-reviewed journals. The
research consists primarily of comparing the measurements obtained from the
Cerebral Oximeter to the data obtained from existing diagnostic methods,
including EEG, transcranial Doppler and invasive jugular bulb catheter
monitoring or reports of the results of the use of the Cerebral Oximeter in
various procedures. The Company attends trade shows and medical conferences in
order to introduce and promote its Cerebral Oximeter and to meet medical
professionals with an interest in submitting peer-reviewed papers to appropriate
medical journals and to major national meetings. In fiscal year 1997, a total of
37 presentations concerning the Cerebral Oximeter were made at 17 meetings, and
14 peer-reviewed articles (three of which were presented at meetings) discussing
the Cerebral Oximeter were published.
 
SALES AND DISTRIBUTION
 
     The Company sells the Cerebral Oximeter through its direct sales force and
independent distributors. The Company has engaged distributors to provide it
with increased geographic coverage and local sales contacts. In the United
States, the Company sells the Cerebral Oximeter through its 19 direct
salespersons covering 19 states exclusively and supporting seven distributors in
the other 31 states and Puerto Rico. Sales compensation and incentive plans are
designed to motivate the Company's direct sales force by making half of their
targeted compensation dependent on meeting targeted sales levels. The Company
believes that the minimum selling cycle for new medical devices is approximately
six to nine months.
 
     In March 1997, the Company entered into a marketing arrangement with Health
Services Corporation of America, the representative of a buying group for many
small hospitals and extended care facilities. Health Services Corporation of
America informs its member hospital administrators that the Company is its sole
supplier of cerebral oximetry equipment and forwards the Company's marketing
materials to such administrators. In exchange, for its marketing assistance, the
Company's product is available to the members of the buying group at a discount.
 
     From the commencement of commercial shipments of the new model 4100
Cerebral Oximeter in January 1998 through February 28, 1998, the Company has
sold 88 Cerebral Oximeters to distributors and customers. More than 200 United
States hospitals currently use the Cerebral Oximeter, including the Mayo Clinic
Scottsdale, UCLA Medical Center, Orlando Regional Medical Center, the Duke Heart
Center, University of Louisville Hospital, the University of Pittsburgh Medical
Center, the University of Florida-Shands Hospital, the University of Alabama at
Birmingham Hospital, the State University of New York (SUNY) Health Center and
Johns Hopkins Medical Center. The Company's backlog of firm orders for its new
model 4100 Cerebral Oximeter as of February 28, 1998 is a result of the time
between the product's introduction in October 1997 and its first shipment in the
first quarter of fiscal 1998. The Company did not have any backlog of firm
orders as of February 28, 1997. The Company does not believe that its backlog is
indicative of trends in its business.
 
     Internationally, the Company has distribution agreements with 26
independent distributors covering 70 countries. In March 1995, the Company
engaged Baxter Limited as its exclusive distributor in Japan. In April 1995,
Baxter Limited was licensed by the Japanese Ministry of Health and Welfare to
market the INVOS 3100A Cerebral Oximeter in Japan and is in the process of
applying to the Japanese Ministry of Health and Welfare to market the new model
4100 Cerebral Oximeter there. There can be no assurance that the application
will be approved before the fourth quarter of fiscal 1998.
 
     For a description of sales to major customers, see Note 10 of Notes to
Financial Statements included elsewhere in this Prospectus. The Company's
distributor in Japan was the Company's largest customer in the first three
months of fiscal 1998 and in fiscal 1997, 1996 and 1995. The Company is
dependent on its sales to Baxter Limited, and the loss of Baxter Limited as a
customer would have an adverse effect on the Company's business, financial
condition and results of operations.
 
     The Company's export sales for the fiscal years ended November 30, 1997,
1996 and 1995 were approximately $689,000, $745,000 and $1,336,000,
respectively. See Note 10 of Notes to Financial Statements included elsewhere in
this Prospectus. For a description of the breakdown of sales between refurbished
model 3100 Cerebral Oximeters and replacement model 4100 Cerebral Oximeters,
model 3100A Cerebral
                                       33
<PAGE>   35
 
Oximeters, model 4100 Cerebral Oximeters and SomaSensors, see "Management's
Discussion and Analysis of Financial Condition and Results of Operations --
Results of Operations."
 
MANUFACTURING
 
     The Company assembles the Cerebral Oximeter in its facilities in Troy,
Michigan, from components purchased from outside suppliers. The Company
assembles the Cerebral Oximeter to control its quality and costs and to permit
it to make changes to the Cerebral Oximeter faster than it could with
third-party assembly. The Company believes that each component is generally
available from several potential suppliers. The SomaSensor, the printed circuit
boards, other mechanical components and the unit enclosure are the primary
components that must be manufactured according to specifications provided by the
Company. Although the Company is currently dependent on one manufacturer of the
SomaSensor, the Company believes that several potential suppliers are available
to assemble the components of the Cerebral Oximeter. The Company would, however,
require approximately three to four months to change SomaSensor suppliers. The
Company does not currently intend to manufacture on a commercial scale the
disposable SomaSensor or the components of the Cerebral Oximeter.
 
COMPETITION
 
     The Company does not believe there is currently any direct commercial
competition for the Cerebral Oximeter. The Company believes, however, that the
market for cerebral oximetry products is in the early stages of its development
and, if it develops, may become highly competitive. The Company is aware of
foreign companies that have sold products relating to cerebral metabolism
monitoring for research or evaluation.
 
   
     The medical equipment industry is characterized by intense competition and
extensive research and development. Other companies and individuals are engaged
in research and development of non-invasive cerebral oximeters, and the Company
believes there are many other potential entrants into the market. Some of these
potential competitors have well-established reputations, customer relationships
and marketing, distribution and service networks, and have substantially longer
histories in the medical equipment industry, larger product lines and greater
financial, technical, manufacturing, research and development and management
resources than those of the Company. Many of these potential competitors have
long-term product supply relationships with the Company's potential customers.
These potential competitors may succeed in developing products that are at least
as reliable and effective as the Company's product, that make additional
measurements, or that are less costly than the product developed by the Company.
These potential competitors may be more successful than the Company in
manufacturing and marketing their products and may be able to take advantage of
the significant time and effort invested by the Company to gain medical
acceptance of cerebral oximetry. In addition, two patents issued to an
unaffiliated third party and relating to cerebral oximetry will expire this
year, making that technology generally available and potentially helping the
development of competing products. See "-- Market Overview."
    
 
     The Company also competes indirectly with the numerous companies that sell
various types of medical equipment to hospitals for the limited amount of
funding allocated to capital equipment in hospital budgets. The market for
medical equipment is subject to rapid change due to an increasingly competitive,
cost-conscious environment and to government programs intended to reduce the
cost of medical care. Many of these manufacturers of medical equipment are
large, well-established companies whose resources, reputations and ability to
leverage existing customer relationships may give them a competitive advantage
over the Company. The Company's product and technology also compete indirectly
with many other methods currently used to measure blood oxygen levels or the
effects of low blood oxygen levels.
 
     The Company believes that a manufacturer's reputation for producing
accurate, reliable and technically advanced products, references from users,
features (speed, safety, ease of use, patient convenience and range of
applicability), product effectiveness and price are the principal competitive
factors in the medical equipment industry.
 
                                       34
<PAGE>   36
 
PROPRIETARY RIGHTS INFORMATION
 
     The Company has thirteen United States patents and fourteen corresponding
patents in various foreign countries. The Company's patents basically cover
methods and apparatus for introducing light into a body part and receiving,
measuring and analyzing the resulting light and its interaction with tissue.
Such methods also involve receiving, measuring and analyzing the light
transmissivity of various body parts of a single subject, as well as of body
parts of different subjects, which provides a standard against which a single
subject can be compared. Although the Company believes that one or more of its
issued patents cover some of the underlying technology used in the Cerebral
Oximeter, only eight of the issued patents expressly refer to examination of the
brain or developments involving the Cerebral Oximeter.
 
     The Company's initial United States patent, covering the in vivo tissue
examination technology developed in conjunction with the INVOS 2100 and its
predecessor, the SOMA 100, was allowed and issued in 1986 and will expire on
October 14, 2003. The corresponding Canadian patent was issued in 1987, the
corresponding European Community patent was issued in 1990 with related patents
issued in the ten Western European countries which were then member states, and
the corresponding Japanese patent was issued in 1991. The Company's twelve
additional United States patents expire on various dates from February 2005 to
December 2014. The Company also has two patent applications pending in the
United States and several pending patent applications filed in various foreign
countries, with respect to other aspects of its technology relating to the
interaction of light with tissue.
 
     Notwithstanding the Company's patents as noted above, many other patents
have previously been issued to third parties involving optical spectroscopy and
the interaction of light with tissue, some of which relate to the use of optical
spectroscopy in the area of brain metabolism monitoring, which is the primary
use of the Cerebral Oximeter. No patent infringement claims have been asserted
against the Company.
 
     In addition to its patent rights, the Company has obtained United States
Trademark registrations for its trademarks "SOMANETICS," "SOMAGRAM," "INVOS,"
"SOMASENSOR" and "WINDOW TO THE BRAIN," and has also obtained registrations of
its basic mark, "SOMANETICS," in thirteen foreign countries.
 
     The Company also relies on trade secret, copyright and other laws and on
confidentiality agreements to protect its technology, but believes that neither
its patents nor other legal rights will necessarily prevent third parties from
developing or from using similar or related technology to compete against the
Company's product. Moreover, the Company's technology primarily represents
improvements or adaptations of known optical spectroscopy technology, which
might be duplicated or discovered through its patents, reverse engineering or
both.
 
GOVERNMENT REGULATION
 
     The testing, manufacture and sale of the Company's products are subject to
regulation by numerous governmental authorities, principally the FDA and
corresponding state and foreign agencies. Pursuant to the Federal Food, Drug,
and Cosmetic Act, and the regulations promulgated thereunder, the FDA regulates
the preclinical and clinical testing, manufacture, labeling, distribution and
promotion of medical devices. Noncompliance with applicable requirements can
result in, among other things, fines, injunctions, civil penalties, recall or
seizure of products, total or partial suspension of production, failure of the
government to grant premarket clearance or premarket approval for devices,
withdrawal of marketing clearances or approvals and criminal prosecution.
 
     A medical device may be marketed in the United States only with prior
authorization from the FDA unless it is subject to a specific exemption. Devices
classified by the FDA as posing less risk than class III devices are categorized
as class I or II and are eligible to seek "510(k) clearance." Such clearance
generally is granted when submitted information establishes that a proposed
device is "substantially equivalent" in intended use to a class I or II device
already legally on the market or to a "preamendment" class III device (i.e., one
that has been in commercial distribution since before May 28, 1976) for which
the FDA has not called for PMA applications (as defined below). The FDA in
recent years has been requiring a more rigorous
 
                                       35
<PAGE>   37
 
demonstration of substantial equivalence than in the past, including requiring
clinical trial data in some cases. For any devices that are cleared through the
510(k) process, modifications or enhancements that could significantly affect
safety or effectiveness, or constitute a major change in the intended use of the
device, will require new 510(k) submissions. The Company believes that it now
usually takes from three to six months from the date of submission to obtain
510(k) clearance, but it can take substantially longer. The Cerebral Oximeter
has been classified as a class II device.
 
   
     A device requiring prior marketing authorization that does not qualify for
510(k) clearance is categorized as class III, which is reserved for devices
classified by the FDA as posing the greatest risk (e.g., life-sustaining,
life-supporting or implantable devices), or devices that are not substantially
equivalent to a legally marketed class I or class II device. A class III device
generally must receive approval of a premarket approval ("PMA") application,
which requires proving the safety and effectiveness of the device to the FDA.
The process of obtaining PMA approval is expensive and uncertain. The Company
believes that is usually takes from one to three years after filing, but it can
take longer.
    
 
     If human clinical trials of a device are required, whether for a 510(k) or
a PMA application, and the device presents a "significant risk," the sponsor of
the trial (usually the manufacturer or the distributor of the device) will have
to file an investigational device exemption ("IDE") application prior to
commencing human clinical trials. The IDE application must be supported by data,
typically including the results of animal and laboratory testing. If the IDE
application is approved by the FDA and one or more appropriate Institutional
Review Boards ("IRBs"), human clinical trials may begin at a specific number of
investigational sites with a specific number of patients, as approved by the
FDA. If the device presents a "nonsignificant risk" to the patient, a sponsor
may begin the clinical trial after obtaining approval for the study by the IRB
at each clinical site without the need for FDA approval.
 
     In June 1992, the Company received 510(k) clearance from the FDA to market
the Cerebral Oximeter in the United States for use on adults. The Company began
commercial shipments of Cerebral Oximeters and SomaSensors in May 1993. In
November 1993, the Company received notification that the FDA had rescinded the
Company's 510(k) clearance to market the Cerebral Oximeter. As a result, all
commercial sales of the Company's product were suspended. In February 1994, the
Company resumed marketing its product in several foreign countries. In June 1996
the Company received 510(k) clearance from the FDA to market the Cerebral
Oximeter, including the SomaSensor, in the United States. In October 1997, the
Company obtained FDA clearance for advances in its INVOS technology that are
incorporated in its new model 4100 Cerebral Oximeter. The new model 4100
Cerebral Oximeter was introduced in October 1997 and became available in the
first quarter of fiscal 1998.
 
     In October 1997, the Company obtained FDA clearance for advances in its
INVOS technology that are incorporated in its new model 4100 Cerebral Oximeter.
The Company has made additional changes to the model 3100A Cerebral Oximeter
that resulted in the model 4100 Cerebral Oximeter. The Company does not believe
that these changes affect the safety or efficacy of the Cerebral Oximeter and,
therefore, the Company believes that these changes do not require the submission
of a new 510(k) notice. There can be no assurance, however, that the FDA would
agree with the Company's determination not to submit a new 510(k) notice for the
new model 4100 Cerebral Oximeter or that the FDA would not require the Company
to submit a new 510(k) notice for any changes made to the device. If the FDA
requires the Company to submit a new 510(k) notice for its new model 4100
Cerebral Oximeter or for any device modification, the Company may be prohibited
from marketing the modified device until the 510(k) notice is cleared by the
FDA. See "Business -- Government Regulation."
 
   
     Any devices manufactured or distributed by the Company pursuant to FDA
clearances or approvals are subject to pervasive and continuing regulation by
the FDA and certain state agencies. Manufacturers of medical devices for
marketing in the United States are required to adhere to applicable regulations
setting forth detailed GMP requirements, which include testing, control and
documentation requirements. Manufacturers must also comply with Medical Device
Reporting requirements that a firm report to the FDA any incident in which its
product may have caused or contributed to a death or serious injury, or in which
its product malfunctioned and, if the malfunction were to recur, it would be
likely to cause or contribute to a
    
 
                                       36
<PAGE>   38
 
death or serious injury. Labeling and promotional activities are subject to
scrutiny by the FDA and, in certain circumstances, by the Federal Trade
Commission. Current FDA enforcement policy prohibits the marketing of approved
medical devices for unapproved uses.
 
     The Company is subject to routine inspection by the FDA and certain state
agencies for compliance with GMP requirements and other applicable regulations.
The most recent FDA GMP inspection occurred in May 1997. The FDA finalized
changes to the GMP regulations in 1997, which has increased the cost of
compliance with GMP requirements. The Company also is subject to numerous
federal, state and local laws relating to such matters as safe working
conditions, manufacturing practices, environmental protection, fire hazard
control and disposal of hazardous or potentially hazardous substances.
 
     If any of the Company's FDA clearances are denied or rescinded, sales of
the Company's product in the United States would be prohibited during the period
the Company does not have such clearances. In such cases the Company would
consider shipping its product internationally and/or assembling it overseas if
permissible and if the Company determines its product to be ready for commercial
shipment. The FDA's current policy is that a medical device that is not in
commercial distribution in the United States, but which needs 510(k) clearance
to be commercially distributed in the United States, can be exported without the
submission of an export request and prior FDA clearance provided that (i) a
Company believes the device can be found to be substantially equivalent through
a 510(k) submission, (ii) the device is labeled and intended for export only,
(iii) the device is in accord with the specifications of the foreign purchaser
and (iv) other conditions of the export provisions of the Food, Drug and
Cosmetic Act have been met.
 
     Congress recently enacted the FDA Modernization Act of 1997. This law is
intended to make the regulatory process more consistent and efficient. It is too
early to determine whether, or how, these new requirements will affect the
Company.
 
SEASONALITY
 
   
     The Company's business is seasonal. The Company's third-quarter sales have
typically been lower, compared to other fiscal quarters, principally because the
fiscal quarter coincides with the summer vacation season, especially in Europe,
the United States and Japan.
    
 
INSURANCE
 
     Because the Cerebral Oximeter is intended to be used in hospital critical
care units with patients who may be seriously ill or may be undergoing dangerous
procedures, the Company may be exposed to serious potential products liability
claims. The Company has obtained products liability insurance with a liability
limit of $2,000,000. The Company also maintains coverage for property damage or
loss, general liability, business interruption, travel-accident, directors' and
officers' liability and workers' compensation. The Company does not maintain
key-man life insurance.
 
EMPLOYEES
 
     As of February 28, 1998, the Company employed 44 full-time individuals,
including 23 in sales and marketing, five in research and development, eight in
general and administration and eight in manufacturing, quality and service. In
addition, the Company has engaged a full-time international sales consultant.
The Company believes that its future success is dependent, in large part, on its
ability to attract and retain highly qualified managerial, marketing and
technical personnel. The Company's employees are not represented by a union or
subject to a collective bargaining agreement. The Company believes that its
relations with its current employees are good.
 
PROPERTIES
 
     The Company leases 23,392 square feet of office, manufacturing and
warehouse space in Troy, Michigan, of which approximately 12,000 square feet is
office space for sales and marketing, engineering, accounting and other
administrative activities. The lease agreement was extended in fiscal 1997, with
the extension
 
                                       37
<PAGE>   39
 
   
commencing January 1, 1998 and expiring December 31, 1999. The extension also
provides the Company with an option to extend for another year under the same
terms and conditions. The minimum monthly lease payment for the extended term is
approximately $14,700, excluding other occupancy costs. The Company believes
that, depending on sales of the Cerebral Oximeter, its current facility is more
than suitable and adequate for its current needs, including assembly of the
Cerebral Oximeter by the Company and conducting Company operations in compliance
with prescribed FDA GMP guidelines, and will allow for substantial expansion of
the Company's business and number of employees. The Company has subleased a
portion of its warehouse space on a month-to-month basis for $2,700 per month.
    
 
LEGAL PROCEEDINGS
 
     For a description of the settlement in December 1997 of a suit filed by a
shareholder of the Company on April 25, 1994 in the United States District Court
for the Eastern District of Michigan, individually and on behalf of all others
similarly situated, against the Company and Gary D. Lewis, former Chairman of
the Board, in an action captioned Benjamin Langford v. Somanetics Corporation
and Gary D. Lewis, see Note 7 of Notes to Financial Statements included
elsewhere in this Prospectus.
 
                                       38
<PAGE>   40
 
                                   MANAGEMENT
 
DIRECTORS AND EXECUTIVE OFFICERS
 
     The executive officers and directors of the Company as of February 28, 1998
are as follows:
 
<TABLE>
<CAPTION>
                   NAME                     AGE                        POSITION
                   ----                     ---                        --------
<S>                                         <C>    <C>
Bruce J. Barrett..........................  38     President, Chief Executive Officer and a Director
 
Raymond W. Gunn...........................  40     Executive Vice President, Chief Financial Officer
                                                   and Treasurer
 
Richard S. Scheuing.......................  42     Vice President, Research and Development
 
Mary Ann Victor...........................  40     Vice President, Communications and Administration
                                                   and Secretary
 
Ronald A. Widman..........................  47     Vice President, Medical Affairs
 
Pamela A. Winters.........................  39     Vice President, Operations
 
H. Raymond Wallace (1)....................  62     Chairman of the Board
 
Daniel S. Follis (1)......................  60     Director
 
Dr. James I. Ausman.......................  60     Director
</TABLE>
 
- ---------------
(1) Member of the Compensation Committee and Member of the Audit Committee.
 
     Bruce J. Barrett. Mr. Barrett has served as the Company's President and
Chief Executive Officer and as a director of the Company since June 1, 1994. Mr.
Barrett previously served, from June 1993 until May 31, 1994, as the Director,
Hospital Products Division for Abbott Laboratories, Ltd., a health care
equipment manufacturer and distributor, and from September 1989 until May 1993,
as the Director, Sales and Marketing for Abbott Critical Care Systems, a
division of Abbott Laboratories, Inc., a health care equipment manufacturer and
distributor. While at Abbott Critical Care Systems, Mr. Barrett managed Abbott's
invasive oximetry products for approximately four years. From September 1981
until June 1987, he served as the group product manager of hemodynamic
monitoring products of Baxter Edwards Critical Care, an affiliate of Baxter
International, Inc., another health care equipment manufacturer and distributor.
Mr. Barrett received a B.S. degree in marketing from Indiana State University
and an M.B.A. degree from Arizona State University.
 
     Raymond W. Gunn, CPA. Mr. Gunn has served as the Company's Executive Vice
President since May 1993 and as its Chief Financial Officer and Treasurer since
February 1991. From May 1993 until January 1998, he also served as the Company's
Secretary. From November 1992 to May 1993, he served as the Company's Vice
President, Finance and Administration and Assistant Secretary. From February
1991 to November 1992, Mr. Gunn served as the Company's Vice President, Finance.
His prior experience includes serving as a financial manager with Pulte Home
Corporation and a senior accountant with Deloitte Haskins & Sells. Mr. Gunn
received a B.S. degree in management from Oakland University.
 
     Richard S. Scheuing. Mr. Scheuing has served as the Company's Vice
President, Research and Development since January 1998. From March 1993 to
January 1998, he served as the Company's Director of Research and Development.
He joined the Company in 1991 as its Director of Mechanical Engineering. He is
an inventor on three of the Company's issued patents, and one patent that is
pending. Before joining the Company, he was Director of Mechanical Engineering
for Irwin Magnetic Systems, Inc. from 1987 until 1991 and was a Development
Engineer with the Sarns division of Minnesota Mining and Manufacturing Company
("3M") from 1982 to 1987. He received a B.S. degree in mechanical engineering
from the University of Michigan.
 
     Mary Ann Victor. Ms. Victor has served as the Company's Vice President,
Communications and Administration and Secretary since January 1998. From July
1997 until January 1998, she served as the
 
                                       39
<PAGE>   41
 
Company's Director, Communications and Administration and was a consultant to
the Company from September 1996 until July 1997. She also served as Somanetics'
Director of Corporate Communications from July 1991 until February 1994. Prior
experience includes serving as Director of Investor Relations with the Taubman
Company from February to May 1994, legal assistant from June 1994 to November
1994 and then attorney from November 1994 to September 1995 with Varnum
Riddering Schmidt & Howlett, and Human Resources Consultant in the Actuarial
Benefits and Compensation Consulting Group of Deloitte & Touche LLP from
September 1995 to September 1996. Ms. Victor received a B.S. in political
science from the University of Michigan and a J.D. from the University of
Detroit.
 
     Ronald A. Widman. Mr. Widman has served as the Company's Vice President,
Medical Affairs since January 1998. From August 1994 to January 1998, he served
as the Company's Director of Medical Affairs. Before joining the Company as
Marketing Manager in 1991, he was employed by Mennen Medical, Inc., a
manufacturer and marketer of medical monitoring and diagnostic devices, for 12
years, where he held various positions in domestic and international medical
product marketing, including Senior Product Manager from 1982 until 1991. He is
the author of several papers and articles related to medical care and monitoring
devices.
 
   
     Pamela A. Winters. Ms. Winters has served as the Company's Vice President,
Operations since January 1998. From February 1996 to January 1998, she served as
the Company's Director of Operations. From May 1992 to February 1996, she served
as the Company's Manager of Quality Assurance. From October 1991 to May 1992,
Ms. Winters served as the Company's Quality Assurance Supervisor. Ms. Winters is
pursuing a B.S. degree in management from the University of Phoenix.
    
 
     H. Raymond Wallace. Mr. Wallace has served as the Company's Chairman of the
Board since January 1995 (as a non-officer Chairman of the Board since April
1995) and as a director of the Company since June 1994. He also served as a
consultant to the Company from April 1994 until January 1995. He also served as
Chairman of the Board of Cardiometrics, Inc., a cardiovascular medical device
company, from December 1993 until its merger into Endosonics, Inc. in July 1997,
and has served as a self-employed consultant to medical device and other
companies since January 1994. From September 1986 until May 1993 (when he
retired), he served as Vice President and General Manager of Abbott Critical
Care Systems. Mr. Wallace received a B.A. degree from Ohio State University and
an M.B.A. degree from the University of California, Berkeley.
 
     Daniel S. Follis. Mr. Follis has served as a director of the Company since
April 1989. Since 1981, he has served as President of Verschuren & Follis, Inc.,
which advises and administers The Infinity Fund, a limited partnership which
invests in emerging growth companies. Mr. Follis received a B.A. degree in
business from Michigan State University.
 
   
     James I. Ausman, M.D., Ph.D. Dr. Ausman has served as a director of the
Company since June 1994. He has been Professor and Head of the Department of
Neurosurgery at the University of Illinois at Chicago since August 1991. From
September 1978 until July 1991, he was Chairman of the Department of
Neurosurgery at Henry Ford Hospital in Detroit. From December 1987 until July
1991, he served as Director of the Henry Ford Neurosurgical Institute, also at
Henry Ford Hospital. In addition, he was Clinical Professor of Surgery, Section
of Neurosurgery at the University of Michigan in Ann Arbor from 1980 until 1991.
Dr. Ausman received a B.S. degree in chemistry and biology from Tufts
University, a Doctorate of Medicine from Johns Hopkins University School of
Medicine, a Masters of Arts in Physiology, from the State University of New York
at Buffalo, and a Ph.D. in Pharmacology from George Washington University. He
has also received graduate training in neurosurgery at the University of
Minnesota and has obtained board certification from the American Board of
Neurological Surgery.
    
 
     Messrs. Gunn and Barrett are each parties to employment agreements with the
Company pursuant to which they are required to be elected to the offices with
the Company they currently hold. Officers of the Company serve at the discretion
of the Board of Directors. The Directors of the Company will hold office until
the Annual Meeting of Shareholders to be held in 1999 for Daniel S. Follis and
Dr. James I. Ausman, the Annual Meeting of Shareholders to be held in 2000 for
H. Raymond Wallace, and the Annual Meeting of Shareholders to be held in 2001
for Bruce J. Barrett, and until their successors are elected and qualified, or
until their earlier death, resignation or removal. Directors may not be removed
without cause.
                                       40
<PAGE>   42
 
SCIENTIFIC ADVISORS TO THE COMPANY
 
     The Company uses scientific advisors primarily for individual consultation
in their areas of expertise, including assisting it with technical issues
regarding its technology and assisting it in identifying and evaluating
potential additional applications of the Company's INVOS technology.
 
     The following are scientific advisors to the Company:
 
     James I. Ausman, M.D., Ph.D. For a description of the principal occupation
and employment of Dr. Ausman, see "-- Directors and Executive Officers."
 
     Gregory Crosby, M.D. Dr. Crosby has served as the Evan & Marion Helfaer
Professor and Chairman of the Department of Anesthesiology at the University of
Wisconsin Medical School, Madison, Wisconsin, since 1996. For 15 years prior to
1996, he was affiliated with Harvard Medical School and Massachusetts General
Hospital. Dr. Crosby is a neuroanesthesiologist who serves as an examiner on the
American Board of Anesthesiology, on the American Society of Anesthesiologists
subcommittee on Clinical Neurosciences, as Associate Editor of Anesthesiology,
as Section Editor for Neuroanesthesia of the Journal of Clinical Anesthesia and
as a member of the editorial board for the Journal of Neurosurgical
Anesthesiology.
 
     Robert R. Di Loreto, M.D. Dr. Di Loreto has held senior staff appointments
in the Department of Surgery, Urology Section and the Department of Pediatrics,
Pediatric Urology Section, at St. John Hospital and Medical Center in Detroit
since 1980. In addition, he has been the Medical Director of Michigan Mobile
Lithotripsy Inc. since 1988 and has served on the adjunct teaching staff,
Department of Urology, at Henry Ford Hospital since 1980. Dr. Di Loreto also has
sat as a panel member, Center for Device Evaluation, Division of
Gastroenterology and Urology, at the FDA, since 1990.
 
     Manuel Dujovny, M.D. Dr. Dujovny has served as the Professor and Associate
Head of the Department of Neurosurgery, College of Medicine and Neuropsychiatric
Institute, University of Illinois Hospital at Chicago, since August 1991. He
also is the Director of Imaging Guided Stereotactic Surgery and Radio-surgery at
the University Hospital. Previously, he served as Director of Neurosurgical
Research at the Henry Ford Neurological Institute from 1981 until August 1991.
From 1984 until 1991, he also served as the Director of the Brain and Spinal
Cord Tumor Center at Henry Ford Hospital. He serves on numerous FDA working
groups examining materials and products and on the American Society of Testing
Materials (ASTM) committee for neurological surgery. Dr. Dujovny has also
written numerous articles on cerebral ischemia-related difficulties.
 
     George A. Kling, M.D. Dr. Kling has served as Chairman and Professor of the
Department of Radiology at Wayne State University School of Medicine in Detroit
since July 1984 and Chief of the Department of Radiology, Harper-Grace Hospitals
in Detroit since July 1976. Dr. Kling has served Wayne State University and
Harper-Grace Hospitals, and the radiological community, in a number of
capacities since 1962, including American Roentgen Ray Society Councilor to the
American College of Radiology and committee appointments to the Michigan State
Medical Society and the Wayne County Medical Society.
 
     Donald S. Prough, M.D. Dr. Prough has served as Professor and Chairman of
the Department of Anesthesiology at The University of Texas Medical Branch in
Galveston since February 1992. Before that he served as Professor of Anesthesia
and Neurology; Head, Section on Critical Care; and Medical Director, Cerebral
Blood Flow Laboratory, at The Bowman Gray School of Medicine, of Wake Forest
University, Winston-Salem, North Carolina, since 1980. He also is editor of the
Neurosurgical Anesthesia Section of Anesthesia and Analgesia and a member of the
editorial board of Critical Care Medicine. Dr. Prough has spoken frequently
about brain monitoring at national meetings of anesthesiologists and physicians
specializing in intensive care.
 
     Hugh F. Stoddart. Mr. Stoddart is a consultant to business in the fields of
science and technology. For forty years he has invented and developed products
for medicine and industry using diverse technologies such as imaging, image
processing, radiation detection, optics, x-rays, spectroscopy, lasers, computers
and electronics. Examples include the first commercial brain scanner based on
positron emission, the Harvard scanner for high resolution imaging of brain
function and systems for non-invasive infrared spectroscopy of the
 
                                       41
<PAGE>   43
 
   
human body. He is presently Principal Investigator on two R&D projects, funded
by the National Institute of Health and the United States Army, involving
medical applications of in vivo near-infrared spectroscopy. He has participated
as president, vice-president, director, or product manager in a number of
medical device and high-technology companies, including the Atomic Instrument
Company, Baird, Atomium, Perkin-Elmer, Bedford Engineering, Cleon, Union Carbide
Imaging Systems, Strichman Medical and NeuroPhysics, where he is currently
Chairman and Senior Scientist. He served as President and Chief Executive
Officer of Strichman Medical Equipment Inc. from 1988 to 1993, and Vice
President and Director of Union Carbide Imaging Systems from 1976 to 1980.
Strichman Medical is a manufacturer of computer workstations for nuclear
medicine and scanners for producing images of the functioning of the human
brain. Union Carbide Imaging Systems is a developer and manufacturer of nuclear
medical imaging equipment.
    
 
     The scientific advisors are employed by and/or have consulting agreements
with entities other than the Company, and they are expected to devote only a
small portion of their time to the Company. They do not actively participate in
the Company's activities or in the development of the Company's technology.
Certain of the institutions with which the scientific advisors are affiliated
may have regulations or policies which limit the ability of such personnel to
act as part-time consultants or in other capacities for a commercial enterprise.
Regulations or policies currently in effect or adopted in the future might limit
the ability of the scientific advisors to consult with the Company.
 
COMPENSATION
 
SUMMARY COMPENSATION TABLE
 
     The following table sets forth information for each of the fiscal years
ended November 30, 1997, 1996 and 1995 concerning compensation of (i) all
individuals serving as the Company's Chief Executive Officer during the fiscal
year ended November 30, 1997 and (ii) each other executive officer of the
Company whose total annual salary and bonus exceeded $100,000 in fiscal 1997:
 
                           SUMMARY COMPENSATION TABLE
 
<TABLE>
<CAPTION>
                                                                          LONG-TERM
                                                                         COMPENSATION
                                                                            AWARDS
                                               ANNUAL COMPENSATION    ------------------
                                              ---------------------       SECURITIES        ALL OTHER
     NAME AND PRINCIPAL POSITION       YEAR    SALARY        BONUS    UNDERLYING OPTIONS   COMPENSATION
     ---------------------------       ----   --------      -------   ------------------   ------------
<S>                                    <C>    <C>           <C>       <C>                  <C>
Bruce J. Barrett.....................  1997   $200,688      $12,188        135,000             $--
  President and Chief Executive        1996    195,000           --         43,200(1)           --
  Officer                              1995    195,000           --         33,000(1)           --
Raymond W. Gunn......................  1997    110,250        4,823         45,000              --
  Executive Vice President             1996    105,000           --         19,100(1)           --
  and Chief Financial Officer          1995     95,625           --         10,000(1)           --
</TABLE>
 
- ---------------
 
(1) The fiscal 1995 numbers include options to purchase 16,500 and 5,000 Common
    Shares granted to Messrs. Barrett and Gunn, respectively, subject to
    shareholder approval of an amendment to the Company's 1991 Incentive Stock
    Option Plan at the 1995 Annual Meeting of Shareholders. Although more than
    85% of those voting approved the proposed amendment to the 1991 Incentive
    Stock Option Plan, as a result of a significant number of broker non-votes,
    there were insufficient votes in favor of the amendment, it was not approved
    and the options were cancelled. The fiscal 1995 numbers also include options
    to purchase 16,500 and 5,000 Common Shares granted to Messrs. Barrett and
    Gunn, respectively, after the 1995 Annual Meeting of Shareholders and
    subject to shareholder approval of an amendment to the Company's 1991
    Incentive Stock Option Plan at the next meeting of the Company's
    shareholders. These options were cancelled in December 1995 (and the
    proposed amendment was cancelled) in exchange for options covering the same
    number of shares and exercisable at the same exercise price, but granted
    independent of the Company's stock option plans and not subject to
    shareholder approval. The
 
                                       42
<PAGE>   44
 
fiscal 1996 numbers include these new options to purchase 16,500 and 5,000
Common Shares granted to Messrs. Barrett and Gunn, respectively.
 
COMPENSATION OF DIRECTORS AND SCIENTIFIC ADVISORS
 
     The Company's directors who are not officers or employees of the Company
(collectively, the "Outside Directors") receive $1,000 for each Board meeting
attended in person, $250 for each telephonic Board meeting attended and $250 for
each Board committee meeting attended on a date other than the date of a Board
meeting. The Company also reimburses Outside Directors for their reasonable
expenses of attending Board and Board committee meetings.
 
     On January 14, 1993, the Board of Directors adopted the Somanetics
Corporation 1993 Director Stock Option Plan (the "Directors Plan"). The
Directors Plan provided for the grant of options to purchase 1,500 shares every
three years beginning June 30, 1993 (including June 30, 1996) to each director
who was not an officer or employee of the Company. The exercise price of the
options was the fair market value of the Common Shares on the date of grant.
Options vested in one-third annual increments beginning on the date of grant and
expired ten years after the date of grant. In addition, each director who was
not an officer or employee of the Company and who first became a director of the
Company after the date the Directors Plan was adopted was automatically granted
an option to purchase a pro-rata portion of 1,500 Common Shares vesting over the
period remaining until the next regular grant of options under the Directors
Plan.
 
   
     The Board of Directors has (i) terminated the Directors Plan, which means
that no future grants of options will be made under the Directors Plan, (ii)
determined to grant Outside Directors who continue to serve as directors of the
Company after the annual meeting of shareholders (beginning with the 1998 Annual
Meeting), 10-year options to purchase 2,000 Common Shares each year on the date
of the annual meeting of shareholders, exercisable at the fair market value of
the Common Shares on the date of grant and (iii) effective as of March 17, 1998,
in exchange for the cancellation of certain outstanding stock options, granted
10-year options under the 1997 Stock Option Plan to Mr. Follis, Dr. Ausman and
Mr. Wallace to purchase 7,500, 5,511, and 5,511 Common Shares, respectively, at
an exercise price equal to $          , the closing sale price of the Common
Shares as of March 17, 1998 (the "Replacement Options").
    
 
     The Replacement Options cover the same number of shares and are subject to
the same terms and conditions as the options previously granted to such
directors under the Directors Plan or under the 1991 Incentive Stock Option
Plan, except that the exercise price of the Replacement Options is $          ,
the fair market value of the Common Shares as of March 17, 1998. The Replacement
Options were effective only when the director canceled all options previously
granted to him under the Directors Plan and the 1991 Incentive Stock Option
Plan. Dr. Ausman also has an option to purchase 2,000 Common Shares at $5.00 a
share granted independent of the Company's plans that is not being canceled. The
Board determined to replace the stock options previously granted to the Outside
Directors under the Directors Plan and the 1991 Incentive Stock Option Plan
because it determined that options with exercise prices equal to the then
current market price of the Company's Common Shares would provide better
incentives to the directors. The Board believes that such options would better
motivate the Company's directors and give them increased incentive to remain
with the Company and make contributions to the long-term performance and growth
of the Company. The Board also believes that such options would more closely
join the interests of such directors with the interests of shareholders of the
Company.
 
     The Company's scientific advisors are not presently compensated by the
Company for their services as scientific advisors. The Company pays scientific
advisors their reasonable expenses for advising the Company. No such expenses
were incurred for the fiscal year ended November 30, 1997.
 
     Under a consulting agreement dated February 28, 1983, Mr. Stoddart has
agreed to provide consulting services to the Company for a term ending February
28, 1999, which term is automatically renewed each year unless terminated by
either party by at least 30 days notice prior to the renewal of the agreement.
Pursuant to this agreement, the Company has entered into a Consulting Order with
NeuroPhysics Corporation, a research and development company owned by Mr.
Stoddart and his son, pursuant to which the Company is funding a portion of
NeuroPhysics' research into the feasibility and development of prototypes of
four new products. See
                                       43
<PAGE>   45
 
   
"Business -- Research and Development." During fiscal 1997, the Company paid
approximately $166,560 in fees and expenses to Mr. Stoddart and NeuroPhysics
under this agreement. Also, effective April 24, 1997, the Company granted Mr.
Stoddart's son, also a consultant to the Company, a 10-year option to purchase
1,500 Common Shares at $4.75 a share in exchange for cancellation of his 10-year
option to purchase 1,500 Common Shares at $14.375 a share.
    
 
     For a description of the Company's former distribution agreement with Mr.
Follis, see "-- Compensation Committee Interlocks and Insider Participation."
For a description of the Company's consulting agreement with Gary D. Lewis, a
former director and a former officer of the Company, see "Certain Transactions."
 
OPTION GRANTS TABLE
 
     The following table sets forth information concerning individual grants of
stock options made during the fiscal year ended November 30, 1997 to each of the
executive officers of the Company named in the Summary Compensation Table above:
 
                       OPTION GRANTS IN LAST FISCAL YEAR
 
<TABLE>
<CAPTION>
                                                                                     POTENTIAL
                                      PERCENT OF                                REALIZABLE VALUE AT
                                        TOTAL                                      ASSUMED ANNUAL
                        NUMBER OF      OPTIONS                                  RATES OF STOCK PRICE
                        SECURITIES    GRANTED TO                                    APPRECIATION
                        UNDERLYING    EMPLOYEES     EXERCISE                      FOR OPTION TERM
                         OPTIONS      IN FISCAL       PRICE      EXPIRATION    ----------------------
         NAME            GRANTED         YEAR       PER SHARE       DATE          5%          10%
         ----           ----------    ----------    ---------    ----------       --          ---
<S>                     <C>           <C>           <C>          <C>           <C>         <C>
Bruce J. Barrett......  135,000(1)       44.0%        $4.75       4/24/07      $403,279    $1,021,987
Raymond W. Gunn.......   45,000(1)       14.7          4.75       4/24/07       134,426       340,662
</TABLE>
 
- ---------------
 
(1) Options to purchase 135,000 and 45,000 Common Shares were granted to Messrs.
    Barrett and Gunn, respectively, in fiscal 1997 under the Company's 1997
    Stock Option Plan, exercisable at the then current fair market value of the
    underlying Common Shares. Each of the options set forth in the table is
    exercisable in one-third cumulative annual increments beginning April 24,
    1998. Each option also becomes 100% exercisable immediately 10 days before
    or upon specified changes in control of the Company.
 
     With respect to each of the options described above, the portion of such
option which is exercisable at the date of termination of employment remains
exercisable until the expiration date of the option, unless termination is for
cause. If upon exercise of these options the Company must pay any amount for
income tax withholding, in the Compensation Committee's or the Board of
Directors' sole discretion, either the optionee will pay such amount to the
Company or the number of Common Shares delivered by the Company to the optionee
will be appropriately reduced to reimburse the Company for such payment. The
Compensation Committee or the Board may also permit the optionee to choose to
have such shares withheld or to tender Common Shares the optionee already owns.
The Compensation Committee or the Board may also make such other arrangements
with respect to income tax withholding as it shall determine.
 
                                       44
<PAGE>   46
 
AGGREGATED OPTION EXERCISES AND FISCAL YEAR-END OPTION VALUE TABLE
 
     The following table sets forth information concerning each exercise of
stock options during the fiscal year ended November 30, 1997 by each of the
executive officers named in the Summary Compensation Table above and the value
of unexercised options held by such persons as of November 30, 1997:
 
                AGGREGATED OPTION EXERCISES IN LAST FISCAL YEAR
                       AND FISCAL YEAR-END OPTION VALUES
 
   
<TABLE>
<CAPTION>
                                                          NUMBER OF SECURITIES          VALUE OF UNEXERCISED
                                                         UNDERLYING UNEXERCISED         IN-THE-MONEY OPTIONS
                                SHARES                     OPTIONS AT 11/30/97               AT 11/30/97
                              ACQUIRED ON    VALUE     ---------------------------   ---------------------------
                               EXERCISE     REALIZED   EXERCISABLE   UNEXERCISABLE   EXERCISABLE   UNEXERCISABLE
                              -----------   --------   -----------   -------------   -----------   -------------
<S>                           <C>           <C>        <C>           <C>             <C>           <C>
Bruce J. Barrett............      --          $--        68,275         149,925        $13,016       $206,839
Raymond W. Gunn.............      --           --        35,575          51,025          6,874         69,791
</TABLE>
    
 
- ---------------
 
"Value Realized" represents the fair value of the underlying securities on the
exercise date minus the aggregate exercise price of such options.
 
EMPLOYMENT CONTRACTS AND TERMINATION OF EMPLOYMENT AND CHANGE-IN-CONTROL
ARRANGEMENTS
 
     Bruce J. Barrett. As of May 13, 1994, the Company entered into an
employment agreement with Bruce J. Barrett, pursuant to which, as amended, he is
employed as President and Chief Executive Officer (or in such other position as
the Board of Directors determines) for a period ending April 30, 2000. Mr.
Barrett's annual salary is currently $204,750, which may be increased by the
Board of Directors, and he received a one-time signing bonus equal to $24,375
upon execution of the agreement. Mr. Barrett is also entitled to participate in
any bonus plan established by the Compensation Committee of the Board of
Directors. The Company adopted bonus plans both for fiscal 1997 and for fiscal
1998. Mr. Barrett is entitled to various fringe benefits under the agreement,
including 12 months of compensation and six months of benefits if his employment
under the agreement is terminated without cause or if the agreement expires
without being renewed. Mr. Barrett has agreed not to compete with the Company
during specified periods following the termination of his employment.
 
     Raymond W. Gunn. Pursuant to the employment agreement between the Company
and Mr. Gunn, dated December 1, 1992, as amended, Mr. Gunn is employed as
Executive Vice President and Chief Financial Officer and Treasurer of the
Company (or in such other position as the Board of Directors determines) for a
period ending April 30, 2000. Mr. Gunn's base salary under the agreement is
currently $110,250, which may be increased by the Board of Directors. Mr. Gunn
is entitled to a bonus determined at the discretion of the Company's Board of
Directors. Mr. Gunn is entitled to various fringe benefits under the agreement,
including disability insurance, a leased automobile and twelve months of
compensation and benefits if his employment under the agreement is terminated
without cause or if the agreement expires without being renewed. The agreement
also provides that Mr. Gunn will not compete against the Company during
specified periods following the termination of his employment.
 
     Stock Option Terms. All options granted under the Company's stock option
plans through February 28, 1998, that are not already 100% exercisable
immediately, including options granted to Messrs. Barrett and Gunn, become 100%
exercisable immediately 10 business days before or upon specified changes in
control of the Company.
 
COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION
 
     During the fiscal year ended November 30, 1997, Daniel S. Follis and H.
Raymond Wallace served as the members of the Company's Compensation Committee.
None of the members of the Company's Compensation Committee was, during the
fiscal year ended November 30, 1997, an officer or employee of the Company, or a
former officer of the Company, except that Mr. Wallace became the Company's
non-salaried Chairman
 
                                       45
<PAGE>   47
 
of the Board on January 27, 1995 and became a non-officer Chairman of the Board
effective April 6, 1995. Mr. Follis has the relationships with the Company
described below:
 
     Exchange Warrants and Class M Warrants. On September 1, 1990, in connection
with the renewal of notes payable to shareholders of the Company, the Company
issued Exchange Warrants to purchase an aggregate of 4,500 Common Shares at
$20.00 per share, including Exchange Warrants to purchase 216 Common Shares
issued to a corporation affiliated with Mr. Follis, a director and shareholder
of the Company. During September through December 1990, the Company also issued
Class M Warrants, warrants to purchase 62,835 Common Shares at $10.00 per share,
including Class M Warrants to purchase 715 Common Shares at $9.50 per share
issued to Mr. Follis. Mr. Follis exercised his Class M Warrants on September 26,
1996. The Exchange Warrants expired unexercised on March 27, 1997.
 
     Distributorship Agreement. The Company entered into a distributorship
agreement with Somatek, Inc., an entity 50% owned by Mr. Follis. The
distributorship covered the territory of Michigan. The agreement was approved by
the Company's disinterested directors and was made in the ordinary course of
business on the Company's standard form of distributorship agreement.
Transactions pursuant to the distributorship agreement were on substantially the
same terms, including the purchase price of the Company's product covered by
such agreement, as those prevailing at the time for comparable agreements and
transactions with other distributors.
 
     During fiscal 1996, the Company entered into new distribution agreements
with its United States distributors, including Somatek, Inc. The Company wrote
off $67,690 of its receivables from Somatek, Inc. in exchange for the return of
15 INVOS 3100 Cerebral Oximeters and 108 SomaSensors from Somatek, Inc. and its
customers. During the fiscal years ended November 30, 1997, 1996 and 1995, the
Company had no sales to Somatek, Inc. pursuant to its distributor agreement.
Effective February 28, 1997, the Company terminated its distribution agreement
with Somatek, Inc. and in connection with such termination, the Company wrote
off $12,500 of its receivables from Somatek, Inc. in exchange for the return of
two INVOS 3100A Cerebral Oximeters from Somatek, Inc. As of November 30, 1996
and 1997 and February 28, 1998, Somatek, Inc. had no outstanding indebtedness to
the Company. As of November 30, 1995, Somatek, Inc. owed the Company $67,690.
 
INDEMNIFICATION OF DIRECTORS AND OFFICERS
 
     The Michigan Business Corporation Act, as amended, authorizes a corporation
under specified circumstances to indemnify its directors and officers (including
reimbursement for expenses incurred). The provisions of the Company's Bylaws
relating to indemnification of directors and executive officers generally
provide that directors and executive officers will be indemnified to the fullest
extent permissible under Michigan law. The provision also provides for the
advancement of litigation expenses at the request of a director or executive
officer. These obligations are broad enough to permit indemnification with
respect to liabilities arising under the Securities Act of 1933, as amended, or
the Michigan Uniform Securities Act, as amended. The Company's Bylaws and Mr.
Barrett's and Mr. Gunn's employment agreements also provide for indemnification.
The Company believes that such indemnification will assist the Company in
continuing to attract and retain talented directors and officers in light of the
risk of litigation directed against directors and officers of publicly-held
corporations.
 
     The Michigan Business Corporation Act, as amended, also permits Michigan
corporations to limit the personal liability of directors for a breach of their
fiduciary duty. The provisions of the Restated Articles of Incorporation limit
director liability to the maximum extent currently permitted by Michigan law.
Michigan law allows a corporation to provide in its articles of incorporation
that a director of the corporation will not be personally liable to the
corporation or its shareholders for monetary damages for breach of fiduciary
duty as a director, except for liability for specified acts. As a result of the
inclusion of such a provision, shareholders of the Company may be unable to
recover monetary damages against directors for actions taken by them which
constitute negligence or gross negligence or which are in violation of their
fiduciary duties, although it may be possible to obtain injunctive or other
equitable relief with respect to such actions. If equitable remedies are found
not to be available to shareholders in any particular case, shareholders may not
have any effective
 
                                       46
<PAGE>   48
 
remedy against the challenged conduct. These provisions, however, do not affect
liability under the Securities Act of 1933, as amended.
 
     In addition, the Company has obtained Directors' and Officers' liability
insurance. The policy provides for $1,000,000 in coverage including prior acts
dating to the Company's inception and liabilities under the Securities Act of
1933, as amended, in connection with the Company's initial public offering, the
exercise of Class A Warrants and this offering.
 
     Insofar as indemnification for liabilities arising under the Securities Act
of 1933, as amended, may be permitted to directors, officers or persons
controlling the Company pursuant to the foregoing provisions, the Company has
been informed that in the opinion of the Securities and Exchange Commission such
indemnification is against public policy as expressed in the Securities Act of
1933, as amended, and is therefore unenforceable.
 
                              CERTAIN TRANSACTIONS
 
     See "Management -- Compensation -- Compensation Committee Interlocks and
Insider Participation" for a description of Exchange Warrants and Class M
Warrants issued to Mr. Follis, and a distributorship agreement between the
Company and Somatek, Inc., an entity 50% owned by Mr. Follis.
 
     Pursuant to an Agreement and Release, dated and effective as of February 1,
1995, between the Company and Gary D. Lewis, a director of the Company until
November 4, 1996 and the Company's former Chairman of the Board (until January
27, 1995), President and Chief Executive Officer (until May 31, 1994), (i) Mr.
Lewis voluntarily resigned from all of his positions with the Company, except as
a director of the Company, and his employment agreement terminated without any
obligations of either party, (ii) Mr. Lewis agreed to provide consulting
services to the Company through January 31, 1997, (iii) the Company agreed to
provide Mr. Lewis with (a) $150,000 a year for two years, (b) the same health,
medical and dental benefits as are provided to the Company's executive officers
from time to time for two years, (c) a facsimile machine, computer equipment and
office furniture and (d) $2,500 for legal fees and reimbursement of Mr. Lewis'
business-related expenses, (iv) the Company and Mr. Lewis amended and restated
the Company's note receivable from Mr. Lewis, (v) Mr. Lewis agreed to
confidentiality, non-compete and non-solicitation provisions for periods
specified in the agreement and (vi) each party released the other from all
claims through the date of the agreement.
 
     On February 1, 1993, the Company made a $200,000 loan to Gary D. Lewis, the
Company's former Chairman of the Board, President and Chief Executive Officer
and a former director of the Company, secured by a second mortgage on the home
Mr. Lewis purchased at that time. The principal and all accrued interest were
originally due on January 31, 1998. The loan bore interest at 8% a year. In July
1994, Mr. Lewis agreed to make regular periodic reductions in the outstanding
principal balance of the note, with the entire amount to be paid back to the
Company within one year. Mr. Lewis paid the Company $25,000 toward the
outstanding principal balance on November 30, 1994.
 
     Pursuant to the Agreement and Release between Mr. Lewis and the Company,
the Company and Mr. Lewis amended and restated the promissory note evidencing
the loan. As amended, Mr. Lewis' promissory note provided for the repayment of
the $175,000 balance from the Company on January 31, 1998, with interest at an
annual rate equal to the Company's bank's prime rate plus .75%. The note was
further secured by 17,500 of Mr. Lewis' options to purchase the Company's stock
and the underlying securities.
 
     On November 6, 1996, Gary D. Lewis paid the Company $175,000 (the
outstanding principal amount of the loan at the time) in full satisfaction of
all of his obligations under the loan, and the Company wrote off approximately
$29,750 of accrued interest with respect to that loan. The largest principal
amount of the loan outstanding during fiscal 1996 was $175,000 (not including
approximately $29,750 of accrued interest), and as of November 6, 1996 the loan
was fully repaid.
 
                                       47
<PAGE>   49
 
                             PRINCIPAL SHAREHOLDERS
 
     The following table sets forth information with respect to the beneficial
ownership of the Company's Common Shares as of February 28, 1998, and as
adjusted to reflect the sale of the Common Shares offered hereby, by (i) each
director of the Company, (ii) each executive officer of the Company named in the
Summary Compensation Table above, (iii) all directors and executive officers of
the Company as a group and (iv) each person known by the Company to own more
than 5% of the Company's Common Shares.
 
<TABLE>
<CAPTION>
                                                                                         PERCENTAGE
                                                                                     BENEFICIALLY OWNED
                                                              NUMBER OF         ----------------------------
                                                            COMMON SHARES        BEFORE THE      AFTER THE
               NAME OF BENEFICIAL OWNER                   BENEFICIALLY OWNED    OFFERING (1)    OFFERING (2)
               ------------------------                   ------------------    ------------    ------------
<S>                                                       <C>                   <C>             <C>
BRUCE J. BARRETT......................................        120,892(3)            2.7%            1.9%
 
RAYMOND W. GUNN.......................................         53,425(4)            1.2%              *
 
H. RAYMOND WALLACE....................................          6,236(5)              *               *
 
DANIEL S. FOLLIS......................................         28,056(6)              *               *
 
DR. JAMES I. AUSMAN...................................         18,410(7)              *               *
 
ALL DIRECTORS AND EXECUTIVE OFFICERS AS A GROUP (9
PERSONS)..............................................        255,387(8)            5.7%            3.9%
</TABLE>
 
- ---------------
 
 *  Represents less than 1% of outstanding Common Shares.
 
(1) Based on 4,285,334 Common Shares outstanding as of February 28, 1998.
 
(2) Based on 6,285,334 Common Shares outstanding, assuming all 2,000,000 Common
    Shares offered hereby are sold to third parties.
 
(3) Includes 117,400 Common Shares that Mr. Barrett has the right to acquire
    within 60 days and 500 shares owned by his wife.
 
(4) Includes 51,825 Common Shares that Mr. Gunn has the right to acquire within
    60 days.
 
(5) Includes 4,636 Common Shares that Mr. Wallace has the right to acquire
    within 60 days and 1,000 shares held in a living trust; Mr. Wallace has sole
    voting and dispositive power over the shares held in the trust.
 
(6) Includes 6,625 Common Shares that Mr. Follis has the right to acquire within
    60 days. The 28,056 Common Shares shown above as beneficially owned by Mr.
    Follis include 8,820 Common Shares owned by The Infinity Fund, a limited
    partnership in which Mr. Follis is a 6.068% limited partner and a 50%
    general partner and which is administered by Verschuren & Follis, Inc., a
    corporation in which Mr. Follis is a 50% shareholder, a director and the
    President.
 
(7) Includes 5,636 Common Shares that Dr. Ausman has the right to acquire within
    60 days, 9,744 Common Shares owned jointly with his wife and 3,030 shares
    held in an individual retirement account over which Dr. Ausman exercises
    sole voting and investment control.
 
(8) Includes 209,390 Common Shares which all executive officers and directors as
    a group have the right to acquire within 60 days.
 
                                       48
<PAGE>   50
 
                          DESCRIPTION OF CAPITAL STOCK
 
GENERAL
 
     The authorized capital shares of the Company consist of an aggregate of
20,000,000 Common Shares, par value $0.01 per share, and 1,000,000 Preferred
Shares, par value $0.01 per share. As of February 28, 1998, 4,285,334 Common
Shares and no Preferred Shares were outstanding. All of the shares being offered
in this offering are Common Shares.
 
COMMON SHARES
 
     Holders of Common Shares have one vote per share on each matter submitted
to a vote of the shareholders and a ratable right to the net assets of the
Company upon liquidation. Holders of Common Shares participate ratably in
dividends and distributions as may be declared by the Board of Directors from
funds legally available for that purpose, have no conversion rights, are not
redeemable and are not entitled to any preemptive or subscription rights. See
"Price Range of Common Shares and Dividend Policy." The Common Shares currently
outstanding are, and the shares to be issued in connection with this offering
will be, duly authorized, validly issued, fully paid and non-assessable. Holders
of Common Shares have no cumulative voting rights, and accordingly, holders of a
majority of the outstanding Common Shares are able to elect all of the Company's
Directors.
 
   
     The Directors of the Company serve staggered three-year terms. The
Directors of the Company will hold office until the Annual Meeting of
Shareholders to be held in 1999 for Daniel S. Follis and Dr. James I. Ausman,
the Annual Meeting of Shareholders to be held in 2000 for H. Raymond Wallace,
and the Annual Meeting of Shareholders to be held in 2001 for Bruce J. Barrett,
and until their successors are elected and qualified, or until their earlier
death, resignation or removal. Directors may not be removed without cause. The
Restated Articles of Incorporation also set the minimum and maximum number of
directors constituting the entire Board at three and fifteen, respectively, and
require approval of holders of 90% of the Company's voting shares to amend this
provision.
    
 
BUSINESS COMBINATION PROVISIONS
 
     Chapters 7A and 7B of the Michigan Business Corporation Act, as amended,
may affect attempts to acquire control of the Company. In general, under Chapter
7A, "business combinations" (defined to include, among other transactions,
certain mergers, dispositions of assets or shares and recapitalizations) between
covered Michigan business corporations or their subsidiaries and an "interested
shareholder" (defined as the direct or indirect beneficial owner of at least 10%
of the voting power of a covered corporation's outstanding shares) can only be
consummated if approved by at least 90% of the votes of each class of the
corporation's shares entitled to vote and by at least two-thirds of such voting
shares not held by the interested shareholder or affiliates, unless five years
have elapsed after the person involved became an "interested shareholder" and
unless certain price and other conditions are satisfied. The Board of Directors
has the power to elect to be subject to Chapter 7A as to specifically identified
or unidentified interested shareholders.
 
     In general, under Chapter 7B, an entity that acquires "Control Shares" of
the Company may vote the Control Shares on any matter only if a majority of all
shares, and of all non-"Interested Shares", of each class of shares entitled to
vote as a class, approve such voting rights. Interested Shares are shares owned
by officers of the Company, employee-directors of the Company and the entity
making the "Control Share Acquisition" (as defined). Control Shares are shares
that when added to shares already owned by an entity, would give the entity
voting power in the election of directors over any of the three thresholds:
one-fifth, one-third and a majority. The effect of the statute is to condition
the acquisition of voting control of a corporation on the approval of a majority
of the pre-existing disinterested shareholders. The Board of Directors may amend
the bylaws before a "Control Share Acquisition" occurs to provide that Chapter
7B does not apply to the Company.
 
                                       49
<PAGE>   51
 
PREFERRED SHARES
 
     The Company has also authorized the issuance of up to 1,000,000 Preferred
Shares, $0.01 par value per share, none of which is outstanding as of the date
of this Prospectus. The Preferred Shares may be issued from time to time in one
or more series. The Board of Directors is authorized to determine the rights,
preferences, privileges and restrictions granted to, and imposed upon, each
series of Preferred Shares and to fix the number of shares of any series of
Preferred Shares and the designation of any such series. The issuance of
Preferred Shares could be used, under certain circumstances, as a method of
preventing a takeover of the Company and could permit the Board of Directors,
without any action of the holders of the Common Shares, to issue Preferred
Shares which could have a detrimental effect on the rights of holders of the
Common Shares, including loss of voting control. Anti-takeover provisions that
could be included in the Preferred Shares when issued may have a depressive
effect on the market price of the Company's securities and may limit
shareholders' ability to receive a premium on their shares by discouraging
takeover and tender offer bids. The Company has no present plans to issue any
Preferred Shares.
 
TRANSFER AGENT
 
     American Stock Transfer & Trust Company serves as transfer agent for the
Common Shares. As of February 28, 1998 there were 567 holders of record of the
Company's Common Shares.
 
REGISTRATION RIGHTS
 
   
     The placement agents for three of the Company's Regulation S Offerings in
1994, 1995 and 1996 and their transferees have piggy-back registration rights
with respect to the Common Shares underlying the 79,394 Regulation S Agent
Warrants. In addition, the underwriter of the Company's 1997 public offering of
Common Shares has demand and piggy-back registration rights in connection with
the warrant issued to it in connection with that offering. See "Underwriting."
These rights allow the holders to include their Common Shares in any
registration of the Company's securities in a registration statement under the
Securities Act of 1933, subject to specified limitations.
    
 
                                       50
<PAGE>   52
 
   
                                  UNDERWRITING
    
 
   
     Subject to the terms and conditions set forth in an underwriting agreement
(the "Underwriting Agreement"), the Company has agreed to sell to each of the
underwriters named below (the "Underwriters"), for which Brean Murray & Co.,
Inc. is acting as representative (the "Representative"), and each of the
Underwriters severally has agreed to purchase from the Company the aggregate
number of Common Shares set forth opposite its name below:
    
 
   
<TABLE>
<CAPTION>
UNDERWRITERS                                                 NUMBER OF SHARES
- ------------                                                 ----------------
<S>                                                          <C>
Brean Murray & Co., Inc. ...................................
 
                                                                ---------
     Total..................................................    2,000,000
                                                                =========
</TABLE>
    
 
   
     Upon the terms and subject to the conditions of the Underwriting Agreement,
the Company is obligated to sell, and the Underwriters are obligated to
purchase, all of the Common Shares set forth in the table above if any of the
Common Shares are purchased.
    
 
   
     The Underwriters propose to offer the Common Shares to the public initially
at the public offering price set forth on the cover page of this Prospectus, and
to selected dealers at such public offering price less a concession not to
exceed $       per share. The Underwriters or such dealers may reallow a
commission to certain other dealers not to exceed $       per share. After the
offering to the public, the offering price, the concession to selected dealers
and the reallowance to other dealers may be changed by the Representative.
    
 
   
     The offering price will be determined by negotiation between the Company
and the Representative.
    
 
   
     The Company has granted to the Underwriters an option, exercisable for 30
days from the date of this Prospectus, to purchase up to 300,000 additional
Common Shares to cover over-allotments, if any, at the public offering price,
less underwriting discounts and commissions, as set forth on the cover page of
this Prospectus. If the Underwriters exercise this option, then each of the
Underwriters will have a firm commitment, subject to certain conditions, to
purchase a number of option shares proportionate to such Underwriters' initial
commitment as indicated in the table above. The Underwriters may exercise such
option only to cover over-allotments made in connection with the sale of the
Common Shares offered hereby.
    
 
   
     The Company and its officers and directors (who beneficially hold in the
aggregate 255,387 Common Shares, including Common Shares issuable upon exercise
of outstanding options beneficially owned by them) have agreed not to sell,
offer to sell, issue, distribute or otherwise dispose of any Common Shares of
the Company for a period of 180 days from the date of this Prospectus (subject
to certain limited exceptions) without the prior written consent of the
Representative.
    
 
   
     The Company has agreed to reimburse the Underwriters for up to $75,000 of
the Underwriters' out-of-pocket expenses (including fees of their counsel) in
connection with the sale of the Common Shares offered hereby. The Company has
also agreed to indemnify the Underwriters or contribute to losses arising out of
certain liabilities that may be incurred in connection with this offering,
including liabilities under the Securities Act of 1933, as amended.
    
 
   
     In connection with this offering, certain Underwriters may engage in
passive market making transactions in the Common Shares on The Nasdaq SmallCap
Market immediately prior to the commencement of sales in this offering, in
accordance with Rule 103 of Regulation M. Passive market making consists of
displaying bids on The Nasdaq SmallCap Market limited by the bid prices of
independent market makers and purchases limited by such prices and effected in
response to order flow. Net purchases by a passive market maker on each day are
limited to a specified percentage of the passive market maker's average daily
trading volume in
    
 
                                       51
<PAGE>   53
 
   
the Common Shares during a specified period and must be discontinued when such
limit is reached. Passive market making may stabilize the market price of the
Common Shares at a level above that which might otherwise prevail and, if
commenced, may be discontinued at any time.
    
 
   
     In connection with this offering, the Underwriters and selling group
members, if any, may engage in stabilizing, syndicate short covering
transactions, penalty bids or other transactions during the offering that may
stabilize, maintain or otherwise affect the market price of the Common Shares at
a level above that which might otherwise prevail in the open market. Stabilizing
transactions are bids for and purchases of the Common Shares for the purpose of
preventing or retarding a decline in the market price of the Common Shares to
facilitate the offering. Syndicate short covering transactions are bids to
purchase and actual purchases of Common Shares on behalf of the Underwriters to
provide them with enough Common Shares to deliver to those purchasing Common
Shares in the offering. A penalty bid is an arrangement that permits the
Representative to reclaim a selling concession when the Common Shares originally
sold by the syndicate member are purchased in a syndicate covering transaction.
Such stabilizing, syndicate short covering transactions, penalty bids and other
transactions, if commenced, may be discontinued at any time.
    
 
   
     The Representative was the underwriter of a public offering of the
Company's Common Shares that closed on June 4, 1997. In connection with that
offering, the Representative received (i) $520,000 of underwriting discounts,
(ii) warrants to purchase 200,000 Common Shares at $4.80 a share exercisable
during the four-year period beginning May 30, 1998 and (iii) reimbursement of
its expenses.
    
 
                                 LEGAL MATTERS
 
   
     The validity of the Common Shares offered hereby will be passed upon for
the Company by Honigman Miller Schwartz and Cohn, Detroit, Michigan. Certain
legal matters will be passed upon for the Underwriters by Piper & Marbury
L.L.P., New York, New York.
    
 
                                    EXPERTS
 
     The financial statements included in this Prospectus and the related
financial statement schedule included elsewhere in the registration statement,
have been audited by Deloitte & Touche LLP, independent auditors, as stated in
their reports appearing herein and elsewhere in the registration statement
(which reports express an unqualified opinion and include an explanatory
paragraph referring to an uncertainty concerning the Company's ability to
continue as a going concern), and have been so included in reliance upon the
reports of such firm given upon their authority as experts in accounting and
auditing.
 
                             AVAILABLE INFORMATION
 
   
     The Company is subject to the informational requirements of the Securities
Exchange Act of 1934, as amended (the "Exchange Act"), and, in accordance
therewith, files reports and other information with the Securities and Exchange
Commission (the "Commission"). Such reports, proxy and information statements
and other information filed by the Company can be inspected and copied at the
public reference facilities maintained by the Commission in Washington, D.C. at
450 Fifth Street, N.W., Room 1024, Washington, D.C. 20549, and at the
Commission's regional offices in New York (7 World Trade Center, Suite 1300, New
York, New York 10048) and Chicago (Northwestern Atrium Center, 500 West Madison
Street, Suite 1400, Chicago, Illinois 60611). Copies of such material can be
obtained at prescribed rates from the Public Reference Section of the Commission
at 450 Fifth Street, N.W., Washington, D.C. 20549. The Commission can be
contacted at 1-800-SEC-0330 for further information on the operation of the
public reference rooms. The Company's Exchange Act filings are also available to
the public on the Commission's Internet site (http://www.sec.gov).
    
 
     This Prospectus, which constitutes part of a Registration Statement on Form
S-1 filed with the Commission under the Securities Act of 1933, as amended, by
the Company (the "Registration Statement"), omits certain of the information
contained in the Registration Statement. Reference is hereby made to the
 
                                       52
<PAGE>   54
 
Registration Statement and to the exhibits to the Registration Statement for
further information about the Company and the Common Shares. Statements in this
Prospectus concerning provisions of documents are summaries of such documents,
and each statement is qualified by reference to the copy of the applicable
document filed with the Commission. Copies of such material, including the
complete Registration Statement and the exhibits, can be inspected, without
charge at the offices of the Commission, or obtained from the Public Reference
Section of the Commission at 450 Fifth Street, N.W., Washington, D.C. 20549, at
prescribed rates.
 
                                       53
<PAGE>   55
 
                                    GLOSSARY
 
     As used in this Prospectus, the following terms have the meanings set forth
below.
 
ARTERY: One of the vessels carrying blood from the heart to the tissues. The
arteries carry oxygenated blood from the right and left ventricles of the heart
to all parts of the body.
 
BRAIN OXYGEN IMBALANCE: The difference between brain oxygen supply and demand.
Brain oxygen imbalances can be caused by several factors, including changes in
oxygen saturation in the arteries, blood flow to the brain, hemoglobin
concentration and oxygen consumption by the brain.
 
CAPILLARIES: The smallest vessels in the blood-vascular system, connecting the
arteries with the veins.
 
CAROTID ENDARTERECTOMY: The removal of atherosclerotic placque from the carotid
artery.
 
CORONARY ARTERY BYPASS GRAFT: A bypass, established surgically, which permits
blood to travel from the aorta to a branch of the coronary artery at a point
past an obstruction. It is used in treating coronary artery disease.
 
ELECTROENCEPHALOGRAM ("EEG"): A device that measures electrical activity in the
brain, which can be affected by decreased oxygen supply.
 
FDA-CLEARED: A medical device may be marketed in the United States only with
prior authorization from the FDA unless it is subject to a specific exemption.
Devices classified by the FDA as posing less risk than class III devices are
categorized as class I or II and are eligible to seek "510(k) clearance." Such
clearance generally is granted when submitted information establishes that a
proposed device is "substantially equivalent" in intended use to a class I or II
device already legally on the market or to a "preamendment" class III device
(i.e., one that has been in commercial distribution since before May 28, 1976)
for which the FDA has not called for PMA applications (as defined below). The
FDA in recent years has been requiring a more rigorous demonstration of
substantial equivalence than in the past, including requiring clinical trial
data in some cases. For any devices that are cleared through the 510(k) process,
modifications or enhancements that could significantly affect safety or
effectiveness, or constitute a major change in the intended use of the device,
will require new 510(k) submissions. The Company believes that it now usually
takes from three to six months from the date of submission to obtain 510(k)
clearance, but it can take substantially longer. After such clearance the
Company may market its product in the United States.
 
GENERAL ANESTHESIA: Complete anesthesia, affecting the entire body with loss of
consciousness when the anesthetic agent acts upon the brain. This type of
anesthesia is usually accomplished following the administration of inhalational
or intravenous anesthetics. Commonly used for surgical procedures.
 
HEMOGLOBIN: Virtually all the oxygen carried by the blood is bound to
hemoglobin, the red protein in the red blood cells. Hemoglobin passes through
the lungs, bonds with oxygen and is pumped by the heart through arteries and
capillaries to various parts of the body. Those parts of the body extract the
oxygen and the blood carries away carbon dioxide through the capillaries and
veins back to the lungs.
 
HEMORRHAGIC SHOCK: Shock due to massive loss of blood.
 
HYPERTENSION: High blood pressure.
 
HYPOTENSION: Decreased blood pressure; occurs in shock, hemorrhages, infections,
fevers or cancer or under other conditions.
 
HYPOTHERMIA: Having a body temperature below normal.
 
HYPOVOLEMIA: Diminished blood volume.
 
HYPOXEMIA: Insufficient oxygenation of the blood.
 
HYPOXIA: Insufficiency of oxygen delivery to tissue; decreased concentration of
oxygen in the inspired air.
 
IN VIVO: In the living body.
 
                                       54
<PAGE>   56
 
INTRACRANIAL PRESSURE MONITORING: A sensor is placed in the intracranial space
through a drilled hole to monitor the pressure on the brain inside the patient's
skull, which may increase as a secondary effect of certain brain damage or head
injuries.
 
INVASIVE JUGULAR BULB CATHETER MONITORING: Blood is drawn from a patient's
jugular vein (a vein in the neck near the base of the brain), and the oxygen
content, acidity and other blood gases are analyzed directly from the removed
blood.
 
INVOS: In Vivo Optical Spectroscopy is the name of the patented technology that
the Company uses in the operation of the INVOS Cerebral Oximeter.
 
ISCHEMIA: Tissue oxygen starvation due to the obstruction of the inflow of
arterial blood.
 
NEUROLOGICAL EXAM: Uses physical responses to test for signs of brain damage.
 
NEUROSURGERY: Surgery of the nervous system, including the brain.
 
OPEN HEART SURGERY: Any cardiac surgical procedure where the heart is exposed,
such as a valve replacement or repair, heart transplant or congenital repair. It
includes bypass surgery.
 
OPTICAL SPECTROSCOPY: Study of the spectra (series of colors). Relates to the
theories behind INVOS and the interaction between matter and light.
 
OXIMETRY: Use of photoelectric apparatus for determining the amount of oxygen in
the blood. Usually done by measuring the amount of light transmitted through a
translucent part of the tissue.
 
OXYGEN SATURATION: The percentage of total hemoglobin contained in a given
amount of blood which is combined (saturated) with oxygen.
 
OXYGENATED HEMOGLOBIN: Hemoglobin that is bound to oxygen.
 
PULMONARY ARTERY: The artery that carries the venous blood from the right
ventricle to the lungs.
 
PULSE OXIMETRY: A device that measures hemoglobin oxygen saturation in the
arteries in peripheral tissue.
 
SPECTROPHOTOMETER: A device for measuring the amount of color in a solution by
comparison with the spectrum.
 
SPECTROPHOTOMETRY: The estimation of coloring of matter in a solution by use of
a spectrophotometer or spectroscope.
 
STROKE: The sudden loss of consciousness caused by hemorrhage into the brain,
the formation of an embolus or thrombus that blocks an artery, or the rupture of
an extracerebral artery causing ischemia in parts of the brain.
 
SUBDURAL HEMATOMA: Internal bleeding between the skull and brain.
 
TRANSCRANIAL DOPPLER: A device using ultrasound for measuring velocity of blood
in a vessel.
 
VENOUS BLOOD: The dark blood carried back to the heart by the veins, after
oxygen has been extracted by the tissues.
 
                                       55
<PAGE>   57
 
                             SOMANETICS CORPORATION
 
   
                         INDEX TO FINANCIAL STATEMENTS
    
 
<TABLE>
<CAPTION>
                                                              PAGE
<S>                                                           <C>
Independent Auditors' Report................................  F-2
Balance Sheets -- November 30, 1997 and 1996................  F-3
Statements of Operations -- For the Years Ended November 30,
  1997, 1996 and 1995.......................................  F-4
Statements of Shareholders' Equity -- For the Years Ended
  November 30, 1997, 1996 and 1995..........................  F-5
Statements of Cash Flows -- For the Years Ended November 30,
  1997, 1996 and 1995.......................................  F-6
Notes to Financial Statements...............................  F-7
</TABLE>
 
                                       F-1
<PAGE>   58
 
                          INDEPENDENT AUDITORS' REPORT
 
To the Board of Directors and Shareholders of
Somanetics Corporation
Troy, Michigan
 
We have audited the accompanying balance sheets of Somanetics Corporation (the
"Company") as of November 30, 1997 and 1996, and the related statements of
operations, shareholders' equity and cash flows for each of the three years in
the period ended November 30, 1997. These financial statements are the
responsibility of the Company's management. Our responsibility is to express an
opinion on these 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, such financial statements present fairly, in all material
respects, the financial position of the Company at November 30, 1997 and 1996,
and the results of its operations and its cash flows for each of the three years
in the period ended November 30, 1997 in conformity with generally accepted
accounting principles.
 
The accompanying financial statements have been prepared assuming that the
Company will continue as a going concern. As discussed in Note 2 to the
financial statements, conditions exist which raise substantial doubt about the
Company's ability to continue as a going concern. Management's plans concerning
these matters are also described in Note 2. The financial statements do not
include any adjustments that might result from the outcome of these
uncertainties.
 
The Company was in the development stage at November 30, 1996; during the year
ended November 30, 1997, the Company completed its development activities and
commenced its planned principal operations.
 
   
/s/ DELOITTE & TOUCHE LLP
    
 
Detroit, Michigan
   
January 9, 1998 (March 11, 1998 as to paragraph 1 of Note 11)
    
 
                                       F-2
<PAGE>   59
 
                             SOMANETICS CORPORATION
 
                                 BALANCE SHEETS
 
<TABLE>
<CAPTION>
                                                                     NOVEMBER 30,
                                                              ---------------------------
                                                                  1997           1996
                                                              ------------   ------------
<S>                                                           <C>            <C>
                                         ASSETS
Current Assets:
  Cash and cash equivalents (Note 4)........................  $  2,132,376   $  3,291,911
  Marketable Securities (Note 4)............................     2,470,780             --
  Accounts receivable, net of allowance for doubtful
     accounts of approximately $166,000 and $46,000 at
     November 30, 1997 and November 30, 1996, respectively
     (Note 9)...............................................       191,698        191,436
  Inventory, net (Note 4)...................................       433,014        931,135
  Prepaid expenses..........................................        71,581         65,435
                                                              ------------   ------------
     Total current assets...................................     5,299,449      4,479,917
                                                              ------------   ------------
Property and Equipment: (Note 4)
  Machinery and equipment...................................       722,905        479,757
  Furniture and fixtures....................................       184,351        193,343
  Leasehold improvements....................................       166,770        166,770
                                                              ------------   ------------
     Total..................................................     1,074,026        839,870
  Less accumulated depreciation and amortization............      (784,860)      (743,775)
                                                              ------------   ------------
     Net property and equipment.............................       289,166         96,095
                                                              ------------   ------------
Other Assets:
  Patents and trademarks, net (Note 4)......................        72,217         79,129
  Other.....................................................        16,600         16,600
                                                              ------------   ------------
     Total other assets.....................................        88,817         95,729
                                                              ------------   ------------
Total Assets................................................  $  5,677,432   $  4,671,741
                                                              ============   ============
 
                          LIABILITIES AND SHAREHOLDERS' EQUITY
Current Liabilities:
  Accounts payable..........................................  $    390,494   $    364,032
  Accrued liabilities (Notes 5 and 7).......................       397,982        254,110
                                                              ------------   ------------
     Total current liabilities..............................       788,476        618,142
                                                              ------------   ------------
Commitments and Contingencies (Note 7)......................            --             --
Shareholders' Equity: (Notes 3 and 11) Preferred shares;
  authorized, 1,000,000 shares of $.01 par value; no shares
  issued or outstanding.....................................            --             --
  Common shares; authorized, 6,000,000 shares of $.01 par
     value; issued and outstanding, 4,285,334 and 2,285,351
     shares at November 30, 1997 and November 30, 1996,
     respectively...........................................        42,853         22,854
  Additional paid-in capital................................    41,212,639     34,241,798
  Accumulated deficit.......................................   (36,366,536)   (30,211,053)
                                                              ------------   ------------
     Total shareholders' equity.............................     4,888,956      4,053,599
                                                              ------------   ------------
Total Liabilities and Shareholders' Equity..................  $  5,677,432   $  4,671,741
                                                              ============   ============
</TABLE>
 
                       See notes to financial statements
                                       F-3
<PAGE>   60
 
                             SOMANETICS CORPORATION
 
                            STATEMENTS OF OPERATIONS
 
   
<TABLE>
<CAPTION>
                                                              FOR THE YEARS ENDED NOVEMBER 30,
                                                          -----------------------------------------
                                                             1997           1996           1995
                                                          -----------    -----------    -----------
<S>                                                       <C>            <C>            <C>
Net Revenues (Notes 4, 9 and 10)........................  $ 1,211,784    $   778,200    $ 1,335,970
Cost of Sales...........................................      631,425        385,136        657,614
                                                          -----------    -----------    -----------
Gross margin............................................      580,359        393,064        678,356
                                                          -----------    -----------    -----------
Operating Expenses:
  Research, development and engineering (Note 4)........      736,427        235,354        285,893
  Selling, general and administrative (Note 9)..........    6,238,330      3,549,939      3,302,751
                                                          -----------    -----------    -----------
     Total operating expenses...........................    6,974,757      3,785,293      3,588,644
                                                          -----------    -----------    -----------
Operating Loss..........................................   (6,394,398)    (3,392,229)    (2,910,288)
                                                          -----------    -----------    -----------
Other Income (Expense):
  Interest income.......................................      206,663         61,603         94,769
  Interest expense......................................           --           (449)          (772)
  Other.................................................       32,252         27,372         (2,112)
                                                          -----------    -----------    -----------
     Total other income.................................      238,915         88,586         91,885
                                                          -----------    -----------    -----------
Net loss................................................  $(6,155,483)   $(3,303,703)   $(2,818,403)
                                                          ===========    ===========    ===========
Net loss per Common Share -- Basic and Diluted (Notes 4
  and 11)...............................................  $     (1.88)   $     (1.77)   $     (1.67)
                                                          ===========    ===========    ===========
Weighted average number of Common Shares outstanding
  (Notes 4 and 11)......................................    3,271,642      1,866,751      1,684,368
                                                          ===========    ===========    ===========
</TABLE>
    
 
                       See notes to financial statements
                                       F-4
<PAGE>   61
 
                             SOMANETICS CORPORATION
 
                       STATEMENTS OF SHAREHOLDERS' EQUITY
 
<TABLE>
<CAPTION>
                                                 PRICE                             ADDITIONAL                       TOTAL
                                                  PER         SHARES      SHARE      PAID-IN     ACCUMULATED    SHAREHOLDERS'
                                                 SHARE       (NOTE 3)     VALUE      CAPITAL       DEFICIT         EQUITY
                                              ------------   ---------   -------   -----------   ------------   -------------
<S>                                           <C>            <C>         <C>       <C>           <C>            <C>
Balance at December 1, 1994.................                 1,626,755   $16,268   $27,591,268   $(24,088,947)   $ 3,518,589
  Exercise of stock options for cash........  $   8.40             100         1           843                           844
  For cash, less issuance costs of
    $282,475................................     12.50         150,000     1,500     1,591,125                     1,592,625
  Net loss..................................                                                      (2,818,403)     (2,818,403)
                                                             ---------   -------   -----------   ------------    -----------
Balance at November 30, 1995................                 1,776,855    17,769    29,183,236   (26,907,350)      2,293,655
  Exercise of stock options for cash........   8.40-14.70        7,717        77        75,030                        75,107
  For cash, less issuance costs of
    $143,587................................     12.50         114,240     1,143     1,283,270                     1,284,413
  Exercise of warrants for cash, less
    issuance costs of $16,350...............  17.50-20.00       19,698       197       339,886                       340,083
  For cash, less issuance costs of
    $650,872................................     11.50         366,841     3,668     3,564,135                     3,567,803
  Redemption of Class B Warrants............      0.50                                (203,759)                     (203,759)
  Net loss                                                                                        (3,303,703)     (3,303,703)
                                                             ---------   -------   -----------   ------------    -----------
Balance at November 30, 1996................                 2,285,351    22,854    34,241,798   (30,211,053)      4,053,599
  Redemption of fractional shares...........                       (17)       (1)         (377)                         (378)
  For cash, less issuance costs of
    $1,008,782..............................      4.00       2,000,000    20,000     6,971,218                     6,991,218
  Net loss                                                                                        (6,155,483)     (6,155,483)
                                                             ---------   -------   -----------   ------------    -----------
Balance at November 30, 1997................                 4,285,334   $42,853   $41,212,639   $(36,366,536)   $ 4,886,956
                                                             =========   =======   ===========   ============    ===========
</TABLE>
 
                       See notes to financial statements
                                       F-5
<PAGE>   62
 
                             SOMANETICS CORPORATION
 
                            STATEMENTS OF CASH FLOWS
 
<TABLE>
<CAPTION>
                                                              FOR THE YEARS ENDED NOVEMBER 30,
                                                          -----------------------------------------
                                                             1997           1996           1995
                                                          -----------    -----------    -----------
<S>                                                       <C>            <C>            <C>
Cash flows from operating activities:
  Net loss..............................................  $(6,155,483)   $(3,303,703)   $(2,818,403)
  Adjustments to reconcile net loss to net cash used in
     operations:
     Depreciation and amortization......................       50,497         66,222        133,128
     Changes in assets and liabilities:
       Accounts receivable (increase) decrease..........         (262)       252,423        (17,913)
       Inventory (increase) decrease....................      498,121          5,286        (61,452)
       Prepaid expenses (increase) decrease.............       (6,146)         6,726         (8,083)
       Other assets (increase) decrease.................        6,912         88,016         (9,545)
       Accounts payable increase (decrease).............       26,462        232,631        (98,807)
       Accrued liabilities increase (decrease)..........      143,872       (162,246)      (111,532)
                                                          -----------    -----------    -----------
     Net cash (used in) operations......................   (5,436,027)    (2,814,645)    (2,992,607)
                                                          -----------    -----------    -----------
Cash flows from investing activities:
  Purchases of marketable securities....................   (2,470,780)            --             --
  Proceeds from sale of marketable securities...........           --             --      1,564,826
  Acquisition of property and equipment (net)...........     (243,568)       (68,914)       (19,267)
  Proceeds (investment) under note receivable-related
     party..............................................           --        190,240        (15,240)
                                                          -----------    -----------    -----------
     Net cash provided by (used in) investing
       activities.......................................   (2,714,348)       121,326      1,530,319
                                                          -----------    -----------    -----------
Cash flows from financing activities:
  Proceeds from issuance of Common Shares...............    6,991,218      5,267,406      1,593,469
  Redemption of Redeemable Convertible Preferred
     Shares.............................................           --        (19,843)            --
  Redemption of Class B Warrants and fractional
     shares.............................................         (378)      (203,759)            --
  Proceeds from issuance of notes payable and long-term
     debt...............................................           --        205,000             --
  Repayment of notes payable and long-term debt.........           --       (205,000)       (30,000)
                                                          -----------    -----------    -----------
     Net cash provided by financing activities..........    6,990,840      5,043,804      1,563,469
                                                          -----------    -----------    -----------
Net increase (decrease) in cash and cash equivalents....   (1,159,535)     2,350,485        101,181
Cash and cash equivalents, beginning of period..........    3,291,911        941,426        840,245
                                                          -----------    -----------    -----------
Cash and cash equivalents, end of period................  $ 2,132,376    $ 3,291,911    $   941,426
                                                          ===========    ===========    ===========
</TABLE>
 
Supplemental disclosure of cash flow information:
 
     Cash paid for interest for the years ended November 30, 1997, 1996 and 1995
approximated $0, $450 and $1,000, respectively.
 
                       See notes to financial statements
                                       F-6
<PAGE>   63
 
                             SOMANETICS CORPORATION
 
                         NOTES TO FINANCIAL STATEMENTS
 
1. ORGANIZATION AND OPERATIONS
 
   
     Somanetics Corporation (the "Company"), a Michigan corporation formed in
January 1982, develops, manufactures and markets the INVOS Cerebral Oximeter
(the "Cerebral Oximeter"), the only FDA-cleared, non-invasive patient monitoring
system that continuously measures changes in the blood oxygen level in the adult
brain. The Cerebral Oximeter is based on the Company's proprietary In Vivo
Optical Spectroscopy ("INVOS(R)") technology. INVOS analyzes various
characteristics of human blood and tissue by measuring and analyzing
low-intensity visible and near-infrared light transmitted into portions of the
body. The Company has incurred research, product development and other expenses
involved in designing, developing, marketing and selling its product, as well as
devoting efforts to raising capital.
    
 
     The Company was in the development stage at November 30, 1996; during the
year ended November 30, 1997, the Company completed its development activities
and commenced its planned principal operations.
 
2. FINANCIAL STATEMENT PRESENTATION
 
     The Company has not achieved sales necessary to support operations. The
Company has incurred an accumulated deficit of $36,366,536 through November 30,
1997. The Company had working capital of $4,510,973, cash, cash equivalents and
marketable securities of $4,603,156, total current liabilities of $788,476 and
shareholders' equity of $4,888,956, as of November 30, 1997.
 
     On June 6, 1996 and October 13, 1997 the Company received clearance from
the FDA to market its model 3100A adult Cerebral Oximeter and enhancements to
its Cerebral Oximeter, respectively, in the United States. The Company's current
financial condition and results of operations and the status of its product
marketing efforts and sales have been affected by the process of obtaining such
clearances.
 
     As of January 9, 1998, the Company had 25 international distributors, 7
United States distributors (including Puerto Rico), 19 direct sales personnel
and 1 international sales consultant. During fiscal 1997, the Company sold its
product to 13 of its international distributors and all of its United States
distributors, and devoted most of its marketing to introducing cerebral oximetry
patient monitoring into the operating rooms of hospitals. There can be no
assurance that the Company will be successful or profitable in marketing the
Cerebral Oximeter and the related SomaSensor.
 
     Management believes that markets exist for the product the Company has
developed; however, there is an inherent uncertainty associated with the success
of such product. The likelihood of success of the Company must be considered in
view of the Company's limited resources and current financial condition, the
problems and expenses frequently encountered in connection with formation of a
new business, the ability to raise new funds, the development and application of
new technology and the competitive environment in which the Company operates.
 
     The net proceeds from the sales of Common Shares in the Regulation S
offering in November 1996 (Note 3) and the net proceeds from the public offering
of Common Shares in June 1997 (Note 3) were sufficient to fund the Company's
working capital requirements for the fiscal year ended November 30, 1997.
Current sales are not sufficient to fund operations. During fiscal 1997, the
Company received approximately $7.0 million in net proceeds from the sale of
Common Shares in a public offering registered under the Securities Act of 1933
(Note 3).
 
     The Company believes that the cash, cash equivalents and marketable
securities on hand at November 30, 1997 will be sufficient to sustain the
Company's operations at budgeted levels and its needs for liquidity into the
second half of fiscal 1998. By that time the Company will be required to raise
additional cash either through additional sales of its product, through sales of
securities, by incurring indebtedness or by some combination of the foregoing.
If the Company is unable to raise additional cash by that time, it will be
required to reduce or discontinue its operations.
 
                                       F-7
<PAGE>   64
                             SOMANETICS CORPORATION
 
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)
 
     The estimated length of time current cash and cash equivalents will sustain
the Company's operations is based on certain estimates and assumptions made by
the Company. Such estimates and assumptions are subject to change as a result of
actual experience. There can be no assurance that actual capital requirements
necessary to market the Cerebral Oximeter and SomaSensor, to develop
enhancements to the SomaSensor, and product extensions of the Cerebral Oximeter,
to conduct research and development concerning additional potential applications
of the Company's technology and for working capital will not be substantially
greater than current estimates.
 
     The Company does not believe that product sales will be sufficient to fund
the Company's operations in fiscal 1998.
 
     See Note 11 for a discussion of negotiations with an underwriter for sales
of securities.
 
     The Company has no loan commitments.
 
     There can be no assurance that even if the Company receives additional
capital, it will be able to achieve the level of sales necessary to sustain its
operations. There can be no assurance that the Company will obtain any funds on
terms acceptable to the Company and at times required by the Company through
sales of the Company's product, sales of securities or loans in sufficient
quantities.
 
     These factors, among others, raise substantial doubt about the Company's
ability to continue as a going concern. The financial statements do not include
any adjustments relating to the recoverability and classification of asset
carrying amounts or the amount and classification of liabilities that might be
necessary should the Company be unable to continue as a going concern.
 
3. STOCK OFFERINGS AND COMMON SHARES
 
     On July 14, 1995 the Company completed the placement of 75,000 Units, at a
price of $25.00 per Unit, for gross proceeds of $1,875,000, through an offering
complying with Regulation S under the Securities Act of 1933, as amended (the
"Act"). The net proceeds to the Company, after deducting the placement agents'
fee and the expenses of the offering, were approximately $1,593,000. Each Unit
consisted of two newly-issued Common Shares, par value $0.01 per share, and one
warrant to purchase one Common Share.
 
     The Warrants are immediately exercisable and transferable separately from
the Common Shares. Each Warrant entitles the holder to purchase one Common Share
at an initial exercise price of $20.00 per share, subject to adjustment, at any
time through July 13, 2000, unless earlier redeemed. The Warrants are redeemable
for $0.10 by the Company at any time after January 13, 1996, if certain
conditions are met; these conditions had not been met as of January 9, 1998.
 
     The Company also granted the placement agent warrants to purchase 15,000
Common Shares at $14.375 per share exercisable during the four-year period
beginning July 14, 1996.
 
     On April 2, 1996, the Company completed the placement of 57,120 Units, at a
price of $25.00 per Unit, for gross proceeds of $1,428,000, through an offering
complying with Regulation S under the Act. The net proceeds to the Company,
after deducting the placement agents' fee and the expenses of the offering, were
approximately $1,284,000. Each Unit consisted of two newly-issued Common Shares,
par value $0.01 per share, and one warrant to purchase one Common Share.
 
     The Warrants are immediately exercisable and transferable separately from
the Common Shares. Each Warrant entitles the holder to purchase one Common Share
at an initial exercise price of $17.50 per share, subject to adjustment, at any
time through April 1, 2001, unless earlier redeemed. The Warrants are redeemable
for $0.10 by the Company at any time if certain conditions are met; these
conditions have not been met as of January 9, 1998.
 
                                       F-8
<PAGE>   65
                             SOMANETICS CORPORATION
 
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)
 
     The Company also granted the placement agent warrants to purchase 11,424
Common Shares at $12.50 per share exercisable during the four-year period
beginning April 2, 1997.
 
     Pursuant to an amended agreement with Rauscher Pierce & Clark, Inc. and
Rauscher Pierce & Clark Limited (collectively, the "Placement Agent") in
connection with the April 2, 1996 Regulation S offering, the Company agreed to
permit a person designated by the Placement Agent to attend meetings of the
Company's Board of Directors until the 1998 Annual Meeting of Shareholders and
to participate in discussions at such meetings.
 
     Also, on November 21, 1996, the Company completed the placement of 366,841
newly-issued Common Shares at a price of $11.50 per share through an offering
complying with Regulation S under the Act. The net proceeds to the Company were
approximately $3,568,000.
 
     During fiscal 1996, 14,600 warrants issued in the Company's 1995 Regulation
S Offering and exercisable at $20.00 per share, and 2,000 warrants issued in the
Company's April 1996 Regulation S Offering and exercisable at $17.50 per share,
were exercised, and the Company paid the placement agent in such offerings a
$16,350 fee in connection with those exercises. As of November 30, 1997, there
were 60,400 redeemable warrants outstanding exercisable at $20.00 per share
until July 13, 2000 and 55,120 redeemable warrants outstanding exercisable at
$17.50 per share until April 1, 2001. These warrants were issued in the
Company's 1995 and April 1996 Regulation S Offerings. The conditions permitting
the Company to redeem these warrants have not been met as of January 9, 1998. In
addition, the Placement Agent and their transferees hold warrants to purchase
52,970 Common Shares exercisable at $12.50 per share, 15,000 Common Shares
exercisable at $14.40 per share and 11,424 Common Shares exercisable at $12.50
per share. There can be no assurance that additional warrants will be exercised
and it is unlikely that they will be exercised if the exercise price exceeds the
market price of the Common Shares. The Company has the right to reduce the
exercise price of these warrants.
 
     On January 15, 1997, the Company's Board of Directors approved an amendment
and restatement of the Company's Restated Articles of Incorporation to (i)
effect a one-for-ten reverse stock split of the Company's Common Shares while
keeping 6,000,000 authorized Common Shares, at a par value of $0.01, and (ii)
remove provisions relating to the Convertible Preferred Shares redeemed February
28, 1996, all subject to shareholder approval at the 1997 Annual Meeting of
Shareholders. The Company's shareholders approved such amendment and restatement
at the 1997 Annual Meeting of Shareholders on March 25, 1997, and the reverse
stock split became effective on April 10, 1997. All information contained in
these financial statements gives retroactive effect to the 1-for-10 reverse
stock split effected April 10, 1997.
 
     On June 4, 1997, the Company closed the public offering of 2,000,000 newly
issued Common Shares at a price of $4.00 per share, for gross proceeds of
$8,000,000, through an offering underwritten by Brean Murray & Co., Inc. The net
proceeds to the Company, after deducting the underwriting discount and the
expenses of the offering, were approximately $7,000,000. The Company also
granted the underwriter warrants to purchase 200,000 Common Shares at $4.80 per
share exercisable during the four-year period beginning May 30, 1998.
 
                                       F-9
<PAGE>   66
                             SOMANETICS CORPORATION
 
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)
 
     Common shares reserved for future issuance upon exercise of stock options
and warrants as discussed above at November 30, 1997, are as follows:
 
<TABLE>
<S>                                                             <C>
1983 Stock Option Plan......................................        9,317
1991 Incentive Stock Option Plan............................      110,289
1993 Director Stock Option Plan.............................       23,998
1997 Stock Option Plan......................................      295,000
Options Granted Independent of Option Plans.................      175,168
Placement Agent Warrants....................................       79,394
Regulation S Warrants.......................................      115,520
Underwriter Warrants........................................      200,000
                                                                ---------
          Total reserved for future issuance................    1,008,686
                                                                =========
</TABLE>
 
4. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
     Cash Equivalents consist of short-term, interest-bearing investments
maturing within three months of their acquisition by the Company.
 
     Marketable Securities consist of AAA rated corporate bonds, classified as
available for sale, maturing approximately six months from the date of
acquisition and are stated at cost, which approximates fair market value.
 
     Inventory is stated at the lower of cost or market on a first-in, first-out
(FIFO) basis. Inventory consists of:
 
<TABLE>
<CAPTION>
                                                                NOVEMBER 30,
                                                           -----------------------
                                                             1997          1996
                                                           ---------    ----------
<S>                                                        <C>          <C>
Finished goods.........................................    $ 100,224    $  437,079
Work in process........................................      174,363       307,510
Purchased components...................................      514,725       386,996
                                                           ---------    ----------
       Sub-total.......................................      789,312     1,131,585
Less reserve for obsolete and excess inventory.........     (356,298)     (200,450)
                                                           ---------    ----------
       Total...........................................    $ 433,014    $  931,135
                                                           =========    ==========
</TABLE>
 
     Property and Equipment are stated at cost. Depreciation and amortization
are computed using the straight-line method over the estimated useful lives of
the assets, which range from three to five years.
 
     Patents and Trademarks are recorded at cost and are being amortized on the
straight-line method over 17 years. Accumulated amortization was $39,516 and
$32,604 at November 30, 1997 and 1996, respectively.
 
     Revenue Recognition occurs upon shipment to customers.
 
     Research, Development and Engineering costs are expensed as incurred.
 
     Loss Per Common Share is computed using the weighted average number of
common shares outstanding during each period. Common Shares issuable under stock
options and warrants have not been considered in the computation of the net loss
per Common Share because such inclusion would be antidilutive. On April 10,
1997, the Company effected a 1-for-10 reverse stock split (Note 3).
 
     Accounting Pronouncements In March 1997, the Financial Accounting Standards
Board ("FASB") issued Statement of Financial Accounting Standards ("SFAS") No.
128, "Earnings per Share." This Statement establishes standards for computing
and presenting earnings per share ("EPS") and applies to all entities with
publicly-held common shares or potential common shares. This Statement replaces
the
 
                                      F-10
<PAGE>   67
                             SOMANETICS CORPORATION
 
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)
 
   
presentation of primary EPS and fully-diluted EPS with a presentation of basic
EPS and diluted EPS, respectively. Basic EPS excludes dilution and is computed
by dividing earnings available to common shareholders by the weighted-average
number of common shares outstanding for the period. Similar to fully diluted
EPS, diluted EPS reflects the potential dilution of securities that could share
in the earnings. This Statement is not expected to have a material effect on the
Company's reported EPS amounts. The Statement is effective for the Company's
financial statements for the quarter ending February 28, 1998 (Note 11).
    
 
     In June 1997, the FASB issued SFAS No. 130, "Reporting Comprehensive
Income," which is effective for fiscal years beginning after December 15, 1997.
This Statement establishes standards for reporting and display of comprehensive
income and its components in financial statements. The Statement is effective
for the Company's financial statements for the year ending November 30, 1999.
 
     In June 1997, the FASB issued SFAS No. 131, "Disclosures about Segments of
an Enterprise and Related Information," which is effective for fiscal years
beginning after December 15, 1997. This statement establishes standards for the
way a public business enterprise reports certain information about operating
segments, and discloses enterprise-wide information about the company's products
and services, activities in different geographic areas, and the company's
reliance on major customers. The statement is effective for the Company's
financial statements for the year ending November 30, 1999.
 
     Use Of Estimates The preparation of financial statements in conformity with
generally accepted accounting principles requires management to make estimates
and assumptions that affect the reported amounts of assets and liabilities, the
disclosure of contingent assets and liabilities, and the reported amounts of
revenues and expenses for each fiscal period. Actual results could differ from
those estimated.
 
5. ACCRUED LIABILITIES
 
     Accrued liabilities consist of the following:
 
<TABLE>
<CAPTION>
                                                                 NOVEMBER 30,
                                                             --------------------
                                                               1997        1996
                                                               ----        ----
<S>                                                          <C>         <C>
Professional Fees........................................    $120,726    $101,697
Clinical Research........................................      43,330          --
Product Upgrades.........................................      25,842      18,261
Warranty.................................................      31,166      12,421
Accrued Insurance........................................      29,768      32,231
Accrued Incentive........................................      50,500          --
     Other...............................................      96,650      89,500
                                                             --------    --------
  Total..................................................    $397,982    $254,110
                                                             ========    ========
</TABLE>
 
6. INCOME TAX
 
     Deferred income taxes reflect the estimated future tax effect of (i)
temporary differences between the amount of assets and liabilities for financial
reporting purposes and such amounts as measured by tax laws and regulations and
(ii) net operating loss and tax credit carryforwards. The Company's deferred tax
assets primarily represent the tax benefit of net operating loss carryforwards
and research and general business tax credit carryforwards. The Company had
deferred tax assets of approximately $12,440,000 and $9,124,000 for the years
ended November 30, 1997 and 1996, respectively, which were entirely offset by
valuation allowances,
 
                                      F-11
<PAGE>   68
                             SOMANETICS CORPORATION
 
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)
 
due to the uncertainty of utilizing such assets against future earnings, prior
to their expiration. The components of deferred income tax assets as of November
30, 1997 and 1996 were as follows:
 
<TABLE>
<CAPTION>
                                                                 NOVEMBER 30,
                                                              -------------------
                                                                1997       1996
                                                                ----       ----
                                                                (IN THOUSANDS)
<S>                                                           <C>         <C>
Net operating loss carryforwards..........................    $ 11,943    $ 8,718
Accrued liabilities.......................................         230        139
Research and general business tax credit carryforwards....         267        267
                                                              --------    -------
     Subtotal.............................................      12,440      9,124
Valuation allowance.......................................     (12,440)    (9,124)
                                                              --------    -------
  Deferred tax asset......................................    $     --    $    --
                                                              ========    =======
</TABLE>
 
     As of November 30, 1997, net operating loss carryforwards of approximately
$35.2 million were available for Federal income tax purposes. The Company's
ability to use the net operating loss carryforwards incurred on or before March
27, 1991 (the date the Company closed its initial public offering) is limited to
approximately $296,000 per year. Research and business general tax credits of
$267,000 are also available to offset future taxes. These losses and credits
expire, if unused, at various dates from 1998 through 2012.
 
     Utilization of the Company's net operating loss carryforwards, tax credit
carryforwards and certain future deductions could be restricted, in the event of
future changes in the Company's equity structure, by provisions contained in the
Tax Reform Act of 1986.
 
7. COMMITMENTS AND CONTINGENCIES
 
     On September 10, 1991 the Company entered into a lease agreement for a
23,392 square foot, stand-alone office, assembly and warehouse facility. The
current lease, as amended, expires December 31, 1999 and grants the Company a
one-year renewal option.
 
     Operating and building lease expense for the years ended November 30, 1997,
1996 and 1995 was approximately $175,700, $173,500, and $278,000, respectively.
Approximate future minimum lease commitments are as follows:
 
<TABLE>
<CAPTION>
YEAR ENDED NOVEMBER 30,
- -----------------------
<S>                                                           <C>
        1998................................................   176,400
        1999................................................   176,400
        2000................................................    14,700
                                                              --------
             Total..........................................  $367,500
                                                              ========
</TABLE>
 
     In December 1991, the Company amended and restated its profit sharing plan
to include a 401(k) plan covering substantially all employees. Under provisions
of the plan, participants may contribute, annually, between 1% and 15% of their
compensation. The Company, at the discretion of its Board of Directors, may
contribute matching contributions or make other annual discretionary
contributions to the plan, all of which, together with the participants'
contributions, cannot exceed 15% of the total compensation paid by the Company
to eligible employees. No Company matching or discretionary contributions were
made to the plan for the years ended November 30, 1997, 1996 or 1995.
 
     On April 25, 1994, a shareholder of the Company filed suit in the United
States District Court for the Eastern District of Michigan, individually and on
behalf of all others similarly situated, against the Company and Gary D. Lewis,
the Company's former Chairman of the Board, in an action captioned Benjamin
Langford v. Somanetics Corporation and Gary D. Lewis. The plaintiff alleged that
Company documents contained
 
                                      F-12
<PAGE>   69
                             SOMANETICS CORPORATION
 
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)
 
material misstatements and omissions in violation of various securities laws.
The plaintiff generally sought unspecified rescissionary damages, interest,
punitive damages and attorneys' fees. The Company settled a class action in 1996
raising similar issues, but approximately 11 persons, including Benjamin
Langford, opted out of that action and the related settlement and, therefore,
were not barred by the settlement from pursuing their own claims against the
Company. As a result, however, Mr. Langford's action was no longer a class
action. The Company, the Company's insurance company and Mr. Langford entered
into a Settlement Agreement in December 1997 that required the Company and its
insurance Company to make a cash payment to Mr. Langford. The Company's portion
of the cash payment was immaterial, and the lawsuit was dismissed with prejudice
in December 1997.
 
     At November 30, 1997, the Company had employment agreements with Bruce J.
Barrett, its President and Chief Executive Officer ("Mr. Barrett"), and Raymond
W. Gunn, its Executive Vice President and Chief Financial Officer ("Mr. Gunn").
The employment agreements, as amended, expire April 30, 2000 for Mr. Barrett and
Mr. Gunn, unless earlier terminated as provided in the agreements. Messrs.
Barrett and Gunn were entitled to receive annual base salaries which at November
30, 1997 were $204,750 and $110,250, respectively, plus potential discretionary
bonuses. Both parties have agreed not to compete with the Company during
specified periods.
 
     The Company may become subject to products liability claims by patients or
physicians, and may become a defendant in products liability or malpractice
litigation. The Company has obtained products liability insurance and an
umbrella policy. There can be no assurance that the Company will be able to
maintain such insurance or that such insurance would be sufficient to protect
the Company against such products liability.
 
8. STOCK OPTION PLANS
 
     In January 1983, February 1991, and January 1997, the Company adopted stock
option plans (the "1983 Plan," the "1991 Plan," and the "1997 Plan,"
respectively) for key management employees, directors, consultants and advisors
of the Company. The plans provide for the issuance of options by the Company to
purchase a maximum of 15,668 Common Shares under the 1983 Plan, 115,000 Common
Shares under the 1991 Plan, and 295,000 Common Shares under the 1997 Plan. In
addition, the Company granted options to employees independent of the plans
("Non-Plan"). Awards and expirations under the 1983 Plan, 1991 Plan, 1997 Plan,
and Non-Plan during the years ended November 30, 1997, 1996 and 1995 are listed
below.
 
     At November 30, 1997, no additional options may be granted under the 1983
Plan, 3,577 Common Shares were available for options to be granted under the
1991 Plan, and 41,800 Common Shares were available under the 1997 Plan.
 
     In January 1993, the Company adopted the Somanetics Corporation 1993
Director Stock Option Plan (the "Directors Plan"). The Directors Plan provides
up to 24,000 Common Shares for the grant of options to purchase 1,500 shares
every three years beginning June 30, 1993 and ending June 30, 2002, to each
director who is not an officer or employee of the Company. In addition, each
director who is not an officer or employee of the Company and who first becomes
a director of the Company after the date the Directors Plan was adopted is
automatically granted an option to purchase a pro-rata portion of 1,500 Common
Shares.
 
     In October 1995, SFAS No. 123, "Accounting for Stock-Based Compensation,"
was issued which encourages, but does not require, companies to record
compensation expense for the fair value of stock options and other equity
instruments granted under stock-based employee compensation arrangements. The
Company has chosen to continue to account for stock-based compensation using the
intrinsic value method prescribed in Accounting Principles Board Opinion No. 25,
"Accounting for Stock Issued to Employees," and related interpretations.
Accordingly, compensation costs for stock options are measured as the excess, if
any, of the
 
                                      F-13
<PAGE>   70
                             SOMANETICS CORPORATION
 
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)
 
market price of the Company's stock at the date of the grant over the amount an
employee must pay to acquire the stock. No compensation expense has been charged
against income for stock option grants.
 
     Had compensation expense for the Company's stock options been determined
based on the fair value of the options on the grant date pursuant to the
methodology of SFAS No. 123, the Company's net loss for 1997 and 1996 on a pro
forma basis would have increased by approximately $901,000 to $(7,057,000), or
$(2.16) per Common Share, and increased by approximately $628,000 to
$(3,932,000), or $(2.11) per Common Share, respectively. The fair value of each
option grant is estimated on the date of grant using the Black-Scholes
option-pricing model with the following weighted-average assumptions used for
1997 and 1996: expected volatility (the measure by which the stock price has
fluctuated or is expected to fluctuate during the period) 88.26%, risk-free
interest rate of 6%, expected lives of 4 years and dividend yield of 0%.
 
     The effects of applying SFAS No. 123 in this pro forma disclosure are not
indicative of future amounts. SFAS No. 123 does not apply to awards prior to
1996.
 
     A summary of the Company's stock option activity and related information
for years ended November 30, 1997, 1996 and 1995 follows:
 
<TABLE>
<CAPTION>
                                                 1997                     1996                     1995
                                         ---------------------    ---------------------    ---------------------
                                                      WEIGHTED                 WEIGHTED                 WEIGHTED
                                                      AVERAGE                  AVERAGE                  AVERAGE
                                         COMMON       EXERCISE    COMMON       EXERCISE    COMMON       EXERCISE
                                         SHARES        PRICE      SHARES        PRICE      SHARES        PRICE
                                         -------      --------    -------      --------    -------      --------
<S>                                      <C>          <C>         <C>          <C>         <C>          <C>
Options outstanding December 1,........  295,517      $ 12.38     234,702(1)   $ 13.76     184,888(1)   $ 14.45
  Options granted......................  306,850         5.08     165,335         9.56      81,616        13.31
  Options exercised....................      --            --      (6,936)        9.34        (100)        8.40
  Options canceled.....................  (47,450)       15.21     (97,584)       11.20     (31,702)       16.76
                                         -------      -------     -------      -------     -------      -------
Options outstanding November
  30,(2)(3)............................  554,917      $  8.23     295,517      $ 12.38     234,702      $ 13.76
                                         =======      =======     =======      =======     =======      =======
Options exercisable November 30,.......  218,847      $ 13.76     177,509      $ 13.08      79,565      $ 13.24
                                         =======      =======     =======      =======     =======      =======
</TABLE>
 
- ---------------
 
(1) Plus 13,239 redeemable Convertible Preferred Shares, which were redeemed on
    February 28, 1996.
 
(2) Exercise dates range from February 21, 1991 to October 1, 2007.
 
(3) As of November 30, 1997, options outstanding have exercise prices between
    $4.00 and $42.50, and a weighted average remaining contractual life of 8.12
    years.
 
Also, see Note 11 for a proposed amendment to the 1997 Stock Option Plan.
 
9. RELATED PARTY TRANSACTIONS
 
     The Company received legal services from certain shareholders. Services
from such parties amounted to approximately $365,800, $348,570 and $236,000
during the years ended November 30, 1997, 1996 and 1995, respectively.
 
     The Company and Gary D. Lewis entered into an Agreement and Release, dated
and effective as of February 1, 1995. Pursuant to the agreement the Company has
agreed to provide Mr. Lewis with (A) $150,000 a year for two years, (B) the same
health, medical and dental benefits as are provided to the Company's executive
officers from time to time for two years.
 
     On November 6, 1996, Gary D. Lewis paid the Company $175,000 (the
outstanding principal amount of the loan at the time) in full satisfaction of
all of his obligations under the loan made by the Company to him on February 1,
1993, and the Company discharged the second mortgage and released the security
interests securing the loan and wrote off approximately $29,750 of accrued
interest with respect to that loan.
 
                                      F-14
<PAGE>   71
                             SOMANETICS CORPORATION
 
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)
 
     The Company recognized no revenue in fiscal 1997, 1996 and 1995,
respectively, from Somatek, Inc., one of the Company's former United States
distributors whose principal owner is a director of the Company. Effective
February 28, 1997 the Company terminated its distribution agreement with
Somatek, Inc. The Company wrote off approximately $12,500, $68,000 and $0 of
trade receivables from Somatek, Inc. in fiscal 1997, 1996 and 1995,
respectively, in exchange for the return of Cerebral Oximeters.
 
10. MAJOR CUSTOMERS AND FOREIGN SALES
 
     The Company had two international distributors and one United States
distributor which accounted for approximately 28% (Japan), 11% (Latin America)
and 12% (United States), respectively, of total sales for the year ended
November 30, 1997, two distributors which accounted for approximately 62%
(Japan) and 15% (Latin America), respectively, of total sales for fiscal year
1996 and two distributors which accounted for approximately 53% (Japan) and 13%
(Latin America), respectively, of total sales for fiscal year 1995.
 
     Additionally, total sales to foreign customers for the years ended November
30, 1997, 1996 and 1995 include approximately $689,000, $745,000 and $1,336,000,
respectively.
 
   
11. SUBSEQUENT EVENTS
    
 
   
  Earnings Per Share
    
 
   
     During the first quarter of fiscal 1998, the Company adopted SFAS No. 128,
"Earnings Per Share." The adoption of SFAS No. 128 had no impact on the reported
loss per share for all periods presented.
    
 
   
  Other Events (Unaudited)
    
 
     On January 15, 1998, the Company's Board of Directors approved an amendment
and restatement of the Company's Restated Articles of Incorporation to (i)
increase the Company's authorized Common Shares from 6,000,000 to 20,000,000
shares, and (ii) remove provisions relating to the reverse stock split effected
April 10, 1997, all subject to shareholder approval at the 1998 Annual Meeting
of Shareholders, which is scheduled for March 17, 1998.
 
     In addition, on January 15, 1998, the Company's Board of Directors approved
an amendment to the Somanetics Corporation 1997 Stock Option Plan to increase
the number of Common Shares reserved for issuance pursuant to the exercise of
options granted under the 1997 Plan by 450,000 shares, from 295,000 to 745,000
shares, subject to shareholder approval at the 1998 Annual Meeting of
Shareholders, which is scheduled for March 17, 1998.
 
     The Company has entered into a Letter Agreement, dated as of February 17,
1998, pursuant to which the Company has exclusively retained a placement agent
to introduce the Company to certain investors as prospective purchasers of
2,000,000 of the Company's common shares. The offering would be a best efforts,
all or none offering, registered under the Securities Act of 1933. Any such
public offering will be made only by means of a prospectus. Among other things,
the offering will be contingent on satisfactory completion of a due diligence
investigation of the Company by the placement agent. In addition, the type and
amount of security, if any, that might ultimately be issued in any such offering
have not yet been definitively determined and will be dependent on negotiations
with the placement agent, market conditions and management's then current
estimate of the proceeds necessary or desired to sustain the Company's
operations. There can be no assurance that such offering will occur or that the
Company will be able to raise any capital or capital in amounts it desires, or
on terms and conditions acceptable to the Company.
 
                                      F-15
<PAGE>   72
 
   
   [Picture of Cerebral Oximeter being used
                    during
    
             open heart surgery]
   
James May, M.D., (left) cardiothoracic surgeon
at Columbia Trident Regional Medical Center in
Charleston, SC, performs an open heart surgery
and uses the Cerebral Oximeter to monitor the
patient's brain oxygen saturation. Robert
Blackard, M.D. (right), chief of anesthesia,
also keeps an alert eye on the monitor's
 
information.
    
 
   
"THIS IS A SIMPLE-TO-USE DEVICE THAT PROVIDES RELIABLE INFORMATION ABOUT THE
                                                ADEQUACY OF CEREBRAL
                                                OXYGENATION, ENABLING MORE
                                                EFFECTIVE AND EFFICIENT PATIENT
                                                CARE."
    
 
   
                                                    James May, M.D.,
    
 
   
                                                    Cardiothoracic Surgeon
    
 
   
                                                    Columbia Trident Regional
    
 
   
                                                    Medical Center
    
 
   
                                                    Charleston, SC
    
 
   
"WE HAVE HAD EXCELLENT RESULTS WITH
THE CEREBRAL OXIMETER . . . YOU
WOULD WANT THIS FOR YOURSELF OR YOUR
FAMILY."
    
 
   
       Christ Stoyanovich, D.O.
    
   
       Chairman
    
   
       Anesthesia Department
    
   
       Bi-County Hospital
    
 
       Warren, MI
 
   
                                           [Picture of Cerebral Oximeter being
                                                          used
    
 
   
                                         during carotid endarterectomy surgery]
    
 
   
The Cerebral Oximeter is being used during a carotid endarterectomy surgery at
                                      Bi-County Hospital in Warren, Michigan.
    
 
             FUTURE APPLICATIONS
            [Picture of SomaSensor
                 on newborn]
 
                                               Research being conducted on
                                               children and newborns is expected
                                               to result in a SomaSensor that
                                               can fit smaller heads and be more
                                               cost effective to manufacture.
                                               Non-invasive monitoring is
                                               especially important in this
                                               patient population, as they
                                               generally have lower oxygen
                                               reserves than adults, have less
                                               blood volume from which to make
                                               invasive blood gas measurements
                                               and are less tolerant of painful
                                               skin punctures and infections.
 
Somanetics, INVOS. "Window to the
Brain" and SomaSensor are registered
trademarks of Somanetics Corporation.                          [SOMANETICS LOGO]
<PAGE>   73
 
                               [SOMANETICS LOGO]
                        [WINDOW TO THE BRAIN TRADEMARK]
<PAGE>   74
 
                                    PART II
 
                     INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 13. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION
 
   
     The following table sets forth the estimated amounts of expenses to be
borne by the Company in connection with the issuance and distribution expenses
of the securities being registered (other than underwriting discounts and
commissions):
    
 
   
<TABLE>
<S>                                                             <C>
Securities and Exchange Commission Registration Fee.........    $  4,198
NASD Filing Fee.............................................       1,923
Nasdaq Listing Fee..........................................       7,500
Printing and Engraving Expenses.............................      35,000
Accounting Fees and Expenses................................      25,000
Legal Fees and Expenses.....................................      75,000
Blue Sky Fees and Expenses..................................      15,000
Transfer Agent's and Registrar's Fees and Expenses..........       7,000
Underwriters' Accountable Expenses..........................      75,000
Miscellaneous Expenses......................................       4,379
                                                                --------
     Total..................................................    $250,000
                                                                ========
</TABLE>
    
 
     All of these expenses, except the Securities and Exchange Commission
registration fee and the NASD filing fee, represent estimates only.
 
ITEM 14. INDEMNIFICATION OF DIRECTORS AND OFFICERS
 
     Under Sections 561-571 of the Michigan Business Corporation Act, as
amended, directors and officers of a Michigan corporation may be entitled to
indemnification by the corporation against judgments, expenses, fines and
amounts paid by the director or officer in settlement of claims brought against
them by third persons or by or in the right of the corporation if those
directors and officers acted in good faith and in a manner reasonably believed
to be in, or not opposed to, the best interests of the corporation or its
shareholders.
 
     The Registrant is obligated under its bylaws and employment agreements with
two of its executive officers to indemnify a present or former director or
executive officer of the registrant, and may indemnify any other person, to the
fullest extent now or hereafter permitted by law in connection with any actual
or threatened civil, criminal, administrative or investigative action, suit or
proceeding arising out of their past or future service to the registrant or a
subsidiary, or to another organization at the request of the registrant or a
subsidiary. In addition, the Restated Articles of Incorporation of the Company
limit certain personal liabilities of Directors of the Company.
 
   
     Reference is also made to Section 8 of the Underwriting Agreement (a form
of which is attached to this Registration Statement as Exhibit 1.1) with respect
to undertakings to indemnify the registrant, its directors and officers and each
person who controls the registrant within the meaning of the Securities Act of
1933, as amended (the "Act"), against certain civil liabilities, including
certain liabilities under the Act.
    
 
     The Company has obtained Directors' and Officers' liability insurance. The
policy provides for $1,000,000 in coverage including prior acts dating to the
Company's inception and liabilities under the Act in connection with the
Company's initial public offering, the exercise and redemption of Class A
Warrants and this offering.
 
ITEM 15. RECENT SALES OF UNREGISTERED SECURITIES
 
     The following securities of the registrant were sold by the registrant
during the past three years without being registered under the Act:
 
     1. In June through September 1996, the Company sold to seven foreign
investors 16,600 Common Shares upon the exercise of warrants issued in offerings
complying with Regulation S under the Securities Act
 
                                      II-1
<PAGE>   75
 
of 1933 (14,600 at $20.00 per share and 2,000 at $17.50 per share). The gross
proceeds to the Company from such sales were $327,000, and the Company paid
Rauscher Pierce & Clark, Inc. and Rauscher Pierce & Clark Limited (the
"Regulation S Agent") a commission of $16,350 in connection with such exercises.
Such Common Shares were not registered, but were issued in reliance upon the
exemption from registration contained in Regulation S under the Act.
 
     2. In September 1996, the Company sold to two accredited investors 3,098
Common Shares upon the exercise of 3,098 Class M Warrants issued before the
Company's initial public offering (exercisable at $9.50 per Class M Warrant).
The gross proceeds to the Company from such sales were $29,433.85. Such Common
Shares were not registered, but were issued in reliance upon the exemptions from
registration contained in Sections 4(2) and 4(6) of the Act.
 
     3. On November 21, 1996 the Company completed the placement of 366,841
Common Shares to 34 foreign investors, at a price of $11.50 per share. The
Regulation S Agent acted as placement agent in connection with the sale of such
Common Shares. The gross proceeds to the Company from such sales were
$4,218,675, and the Company paid the Placement Agent a fee of $421,868 in
connection with such offering. The Company also reimbursed the Placement Agent
for its expenses of the offering, including its counsel's fees. Such securities
were not registered, but were issued in reliance upon the exemption from
registration contained in Regulation S under the Act.
 
     4. On April 2, 1996 the Company completed the placement of 57,120 Units to
20 foreign investors, at a price of $25.00 per Unit. Each Unit consists of two
newly-issued Common Shares and one warrant to purchase one Common Share. The
Regulation S Agent acted as placement agent in connection with the sale of such
Units. The gross proceeds to the Company from such sales were $1,428,000, and
the Company paid the Placement Agent a fee of $114,240 in connection with such
offering. The Company also reimbursed the Placement Agent for its expenses of
the offering, including its counsel's fees. The Company also granted the
Placement Agent warrants to purchase 11,240 Common Shares at $12.50 per share
exercisable during the four-year period beginning April 2, 1997.
 
     The Warrants are immediately exercisable and transferable separately from
the Common Shares. Each Warrant entitles the holder to purchase one Common Share
at an initial exercise price of $17.50 per share, subject to adjustment, at any
time through April 1, 2001, unless earlier redeemed. The Warrants are redeemable
for $0.10 by the Company at any time if certain conditions are met. Such
securities were not registered, but were issued in reliance upon the exemption
from registration contained in Regulation S under the Act.
 
     5. On July 14, 1995 the Company completed the placement of 75,000 Units to
27 foreign investors, at a price of $25.00 per Unit. Each Unit consists of two
newly-issued Common Shares and one warrant to purchase one Common Share. The
Regulation S Agent acted as placement agent in connection with the sale of such
Units. The gross proceeds to the Company from such sales were $1,875,000, and
the Company paid the Placement Agent a fee of $150,000 in connection with such
offering. The Company also reimbursed the Placement Agent for its expenses of
the offering, including its counsel's fees. The Company also granted the
Placement Agent warrants to purchase 15,000 Common Shares at $14.375 per share
exercisable during the four-year period beginning July 14, 1996.
 
     The Warrants are immediately exercisable and transferable separately from
the Common Shares. Each Warrant entitles the holder to purchase one Common Share
at an initial exercise price of $20.00 per share, subject to adjustment, at any
time through July 13, 2000, unless earlier redeemed. The Warrants are redeemable
for $0.10 by the Company at any time after January 13, 1996, if certain
conditions are met. Such securities were not registered, but were issued in
reliance upon the exemption from registration contained in Regulation S under
the Act.
 
ITEM 16. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES
 
     (a) Exhibits
 
     See Exhibit Index immediately preceding the exhibits.
 
                                      II-2
<PAGE>   76
 
     (b) Financial Statement Schedules
 
<TABLE>
<CAPTION>
                              SCHEDULE                            PAGE
                              --------                            ----
    <S>                                                           <C>
    Schedule II -- Valuation and Qualifying Accounts and
      Reserves for the years ended November 30, 1997, 1996 and
      1995......................................................  S-1
</TABLE>
 
ITEM 17. UNDERTAKINGS
 
     (a) Insofar as indemnification for liabilities arising under the Securities
Act of 1933, as amended, may be permitted to directors, officers and controlling
persons of the registrant pursuant to the foregoing provisions, or otherwise,
the registrant has been advised that in the opinion of the Securities and
Exchange Commission, such indemnification is against public policy as expressed
in the Act and is, therefore, unenforceable. In the event that a claim for
indemnification against such liabilities (other than the payment by the
registrant of expenses incurred or paid by a director, officer or controlling
person of the registrant in successful defense of any action, suit or
proceeding) is asserted by such director, officer or controlling person in
connection with the securities being registered, the registrant will, unless in
the opinion of its counsel the matter has been settled by controlling precedent,
submit to a court of appropriate jurisdiction the question whether such
indemnification by it is against public policy as expressed in the Act and will
be governed by the final adjudication of such issue.
 
     (b) The undersigned registrant hereby undertakes that:
 
          (1) For purposes of determining any liability under the Securities Act
     of 1933, as amended, the information omitted from the form of prospectus
     filed as part of this registration statement in reliance upon Rule 430A and
     contained in a form of prospectus filed by the registrant pursuant to Rule
     424(b)(1) or (4) or 497(h) under the Securities Act shall be deemed to be
     part of this registration statement as of the time it was declared
     effective.
 
          (2) For the purpose of determining any liability under the Securities
     Act of 1933, as amended, each post-effective amendment that contains a form
     of prospectus shall be deemed to be a new registration statement relating
     to the securities offered therein, and the offering of such securities at
     that time shall be deemed to be the initial bona fide offering thereof.
 
                                      II-3
<PAGE>   77
 
                                   SIGNATURES
 
   
     Pursuant to the requirements of the Securities Act of 1933, the registrant
has duly caused this amendment no. 1 to registration statement to be signed on
its behalf by the undersigned, thereunto duly authorized, in the City of Troy,
State of Michigan, on March 11, 1998.
    
 
                                         SOMANETICS CORPORATION
                                                (Registrant)
 
                                          By:     /s/ BRUCE J. BARRETT
                                            ------------------------------------
                                            Bruce J. Barrett
                                            Its: President and Chief Executive
                                              Officer
 
   
     Pursuant to the requirements of the Securities Act of 1933, this
registration statement has been signed by the following persons in the
capacities and on the dates indicated.
    
 
   
<TABLE>
<CAPTION>
                  SIGNATURE                                      TITLE                         DATE
                  ---------                                      -----                         ----
<C>                                              <S>                                      <C>
 
/s/ BRUCE J. BARRETT                             President, Chief Executive Officer       March 11, 1998
- ---------------------------------------------      and a Director (Principal Executive
Bruce J. Barrett                                   Officer)
 
/s/ RAYMOND W. GUNN                              Executive Vice President and Chief       March 11, 1998
- ---------------------------------------------      Financial Officer (Principal
Raymond W. Gunn                                    Financial Officer)
 
/s/ WILLIAM M. IACONA                            Corporate Controller (Principal          March 11, 1998
- ---------------------------------------------      Accounting Officer)
William M. Iacona
 
*                                                Chairman of the Board of Directors       March 11, 1998
- ---------------------------------------------
H. Raymond Wallace
 
*                                                Director                                 March 11, 1998
- ---------------------------------------------
Daniel S. Follis
 
*                                                Director                                 March 11, 1998
- ---------------------------------------------
James I. Ausman, M.D., Ph.D.
</TABLE>
    
 
   
*By: /s/ RAYMOND W. GUNN                                          March 11, 1998
    
     -------------------------
   
         Raymond W. Gunn,
    
   
         Attorney-in-fact
    
 
                                      II-4
<PAGE>   78
 
         SCHEDULE II -- VALUATION AND QUALIFYING ACCOUNTS AND RESERVES
              FOR THE YEARS ENDED NOVEMBER 30, 1997, 1996 AND 1995
 
<TABLE>
<CAPTION>
                                              COLUMN B             COLUMN C             COLUMN D       COLUMN E
                                             ----------    ------------------------    -----------    ----------
                                                                  ADDITIONS
                                                           ------------------------
                                                              (2)        CHARGED TO
                                             BALANCE AT    CHARGED TO      OTHER         (1)(3)       BALANCE AT
                                             BEGINNING     COSTS AND     ACCOUNTS,     DEDUCTIONS,      END OF
                                             OF PERIOD      EXPENSES      DESCRIBE      DESCRIBE        PERIOD
                                             ----------    ----------    ----------    -----------    ----------
<S>                                          <C>           <C>           <C>           <C>            <C>
 
Allowance for doubtful accounts:
  Year ended November 30, 1997...........     $ 46,047      $176,790         --         $ 56,847       $165,990
  Year ended November 30, 1996...........      193,766        46,056         --          193,775         46,047
  Year ended November 30, 1995...........      224,509            --         --           30,743        193,766
Note: (1) Write-off uncollectible accounts, net of recoveries
Note: (2) Reserve of additional uncollectible accounts, net of recoveries
Inventory reserve for obsolescence:
  Year ended November 30, 1997...........     $200,450      $442,448         --         $286,600       $356,298
  Year ended November 30, 1996...........       95,078       170,554         --           65,182        200,450
  Year ended November 30, 1995...........       25,000        70,078         --               --         95,078
Note: (3) Write-off obsolete, excess inventory, net of recoveries
</TABLE>
 
                                       S-1
<PAGE>   79
 
                                 EXHIBIT INDEX
 
   
<TABLE>
<CAPTION>
EXHIBIT                           DESCRIPTION
- -------                           -----------
<C>       <S>                                                             <C>
 1.1*     Proposed form of Underwriting Agreement.
 3(i)     Restated Articles of Incorporation of Somanetics
          Corporation, incorporated by reference to Exhibit A to the
          Company's Proxy Statement, dated as of February 4, 1998 in
          connection with the 1998 Annual Meeting of Shareholders held
          on March 17, 1998.
 3(ii)    Amended and Restated Bylaws of Somanetics Corporation,
          incorporated by reference to Exhibit 4.1 to the Company's
          Registration Statement on Form S-8 filed with the Securities
          and Exchange Commission on June 16, 1995.
 5.1*     Opinion of Honigman Miller Schwartz and Cohn concerning the
          legality of the securities being offered.
10.1      Lease Agreement, dated September 10, 1991, between
          Somanetics Corporation and WS Development Company,
          incorporated by reference to Exhibit 10.3 to the Company's
          Quarterly Report on Form 10-Q for the quarter ended August
          31, 1991.
10.2      Extension of Lease, between Somanetics Corporation and WS
          Development Company, dated July 22, 1994, incorporated by
          reference to Exhibit 10.11 to the Company's Quarterly Report
          on Form 10-Q for the quarter ended August 31, 1994.
10.3      Change in ownership of Lease Agreement for 1653 E. Maple
          Road, Troy, MI 48083, dated September 12, 1994, between
          Somanetics Corporation and First Industrial, L.P.,
          incorporated by reference to Exhibit 10.12 to the Company's
          Quarterly Report on Form 10-Q for the quarter ended August
          31, 1994.
10.4      Second Addendum, between Somanetics Corporation and First
          Industrial Mortgage Partnership, L.P., dated April 14, 1997,
          incorporated by reference to Exhibit 10.1 to the Company's
          Quarterly Report on Form 10-Q for the quarter ended May 31,
          1997.
10.5      Somanetics Corporation Amended and Restated 1983 Stock
          Option Plan, incorporated by reference to Exhibit 10.4 to
          the Company's Annual Report on Form 10-K for the fiscal year
          ended November 30, 1991.
10.6      Somanetics Corporation Amended and Restated 1991 Incentive
          Stock Option Plan, incorporated by reference to Exhibit 10.5
          to the Company's Annual Report on Form 10-K for the fiscal
          year ended November 30, 1991.
10.7      Fourth Amendment to Somanetics Corporation 1991 Incentive
          Stock Option Plan, incorporated by reference to Exhibit 10.7
          to the Company's Annual Report on Form 10-K for the fiscal
          year ended November 30, 1992.
10.8      Amended and Restated Fifth Amendment to Somanetics
          Corporation 1991 Incentive Stock Option Plan, incorporated
          by reference to Exhibit 10.10 to the Company's Annual Report
          on Form 10-K for the fiscal year ended November 30, 1995.
10.9      Somanetics Corporation 1993 Director Stock Option Plan,
          incorporated by reference to Exhibit 10.8 to the Company's
          Annual Report on Form 10-K for the fiscal year ended
          November 30, 1992.
10.10     Somanetics Corporation 1997 Stock Option Plan, incorporated
          by reference to Exhibit 10.9 to the Company's Annual Report
          on Form 10-K for the fiscal year ended November 30, 1996.
10.11     First Amendment to Somanetics Corporation 1997 Stock Option
          Plan, incorporated by reference to Exhibit 10.11 to the
          Company's Annual Report on Form 10-K for the fiscal year
          ended November 30, 1997.
10.12     Somanetics Corporation 1997 Employee Incentive Compensation
          Program, incorporated by reference to Exhibit 10.11 to the
          Company's Annual Report on Form 10-K for the fiscal year
          ended November 30, 1996.
</TABLE>
    
<PAGE>   80
 
<TABLE>
<CAPTION>
EXHIBIT                           DESCRIPTION
- -------                           -----------
<C>       <S>                                                             <C>
10.13     Somanetics Corporation 1998 Employee Incentive Compensation
          Plan, incorporated by reference to Exhibit 10.13 to the
          Company's Annual Report on Form 10-K for the fiscal year
          ended November 30, 1997.
10.14     Employment Agreement, dated as of December 1, 1992, between
          Somanetics Corporation and Raymond W. Gunn, incorporated by
          reference to Exhibit 10.14 to the Company's Annual Report on
          Form 10-K for the fiscal year ended November 30, 1992.
10.15     Employment Agreement, dated May 13, 1994, between Somanetics
          Corporation and Bruce J. Barrett, incorporated by reference
          to Exhibit 10.1 to the Company's Quarterly Report on Form
          10-Q for the quarter ended May 31, 1994.
10.16     Amendment to Employment Agreement, dated as of February 23,
          1994, between Somanetics Corporation and Raymond W. Gunn,
          incorporated by reference to Exhibit 10.19 to the Company's
          Annual Report on Form 10-K for the fiscal year ended
          November 30, 1993.
10.17     Amendment to Employment Agreement, dated as of July 21,
          1994, between Somanetics Corporation and Bruce J. Barrett,
          incorporated by reference to Exhibit 10.1 to the Company's
          Quarterly Report on Form 10-Q for the quarter ended August
          31, 1994.
10.18     Amendment to Employment Agreement, dated as of July 21,
          1994, between Somanetics Corporation and Raymond W. Gunn,
          incorporated by reference to Exhibit 10.3 to the Company's
          Quarterly report on Form 10-Q for the quarter ended August
          31, 1994.
10.19     Amendment to Employment Agreement, dated as of December 1,
          1995, between Somanetics Corporation and Raymond W. Gunn,
          incorporated by reference to Exhibit 10.20 to the Company's
          Annual Report on Form 10-K for the fiscal year ended
          November 30, 1995.
10.20     Amendment to Employment Agreement, dated as of November 18,
          1996, between Somanetics Corporation and Raymond W. Gunn,
          incorporated by reference to Exhibit 10.20 to the Company's
          Annual Report on Form 10-K for the fiscal year ended
          November 30, 1996.
10.21     Amendment to Employment Agreement, dated as of April 24,
          1997, between Somanetics Corporation and Bruce J. Barrett,
          incorporated by reference to Exhibit 10.21 to Amendment No.
          1 to the Registration Statement on Form S-1 (file no.
          333-25275), filed with the Securities and Exchange
          Commission on May 30, 1997.
10.22     Amendment to Employment Agreement, dated as of April 24,
          1997, between Somanetics Corporation and Raymond W. Gunn,
          incorporated by reference to Exhibit 10.22 to Amendment No.
          1 to the Registration Statement on Form S-1 (file no.
          333-25275), filed with the Securities and Exchange
          Commission on May 30, 1997.
10.23     Stock Option Agreement, dated May 16, 1994, between
          Somanetics Corporation and Bruce J. Barrett, incorporated by
          reference to Exhibit 10.7 to the Company's Quarterly Report
          on Form 10-Q for the quarter ended August 31, 1994.
10.24     Stock Option Agreement, dated July 21, 1994, between
          Somanetics Corporation and Bruce J. Barrett, incorporated by
          reference to Exhibit 10.4 to the Company's Quarterly Report
          on Form 10-Q for the quarter ended August 31, 1994.
10.25     Stock Option Agreement, dated July 21, 1994, between
          Somanetics Corporation and Gary D. Lewis, incorporated by
          reference to Exhibit 10.5 to the Company's Quarterly Report
          on Form 10-Q for the quarter ended August 31, 1994.
10.26     Stock Option Agreement, dated July 21, 1994, between
          Somanetics Corporation and Raymond W. Gunn, incorporated by
          reference to Exhibit 10.6 to the Company's Quarterly Report
          on Form 10-Q for the quarter ended August 31, 1994.
</TABLE>
<PAGE>   81
 
<TABLE>
<CAPTION>
EXHIBIT                           DESCRIPTION
- -------                           -----------
<C>       <S>                                                             <C>
10.27     Stock Option Agreements, dated July 20, 1995, between
          Somanetics Corporation and Richard Farkas, incorporated by
          reference to Exhibit 10.28 to the Company's Annual Report on
          Form 10-K for the fiscal year ended November 30, 1995.
10.28     Form of Stock Option Agreement, dated December 22, 1995,
          between Somanetics Corporation and various employees,
          incorporated by reference to Exhibit 10.29 to the Company's
          Annual Report on Form 10-K for the fiscal year ended
          November 30, 1995.
10.29     Form of Stock Option Agreement, dated December 22, 1995,
          between Somanetics Corporation and various officers,
          incorporated by reference to Exhibit 10.30 to the Company's
          Annual Report on Form 10-K for the fiscal year ended
          November 30, 1995.
10.30     Form of new Stock Option agreement, dated December 22, 1995,
          between Somanetics Corporation and various employees,
          incorporated by reference to Exhibit 10.31 to the Company's
          Annual Report on Form 10-K for the fiscal year ended
          November 30, 1995.
10.31     Form of Stock Option Agreement, dated January 5, 1996,
          between Somanetics Corporation and two officers,
          incorporated by reference to Exhibit 10.32 to the Company's
          Annual Report on Form 10-K for the fiscal year ended
          November 30, 1995.
10.32     Form of Stock Option Agreement, dated as of April 24, 1997,
          between Somanetics Corporation and twenty-three employees,
          incorporated by reference to Exhibit 10.32 to Amendment No.
          1 to the Registration Statement on Form S-1 (file no.
          333-25275), filed with the Securities and Exchange
          Commission on May 30, 1997.
10.33     Consulting Agreement, dated February 28, 1983, as amended,
          between Somanetics Corporation and Hugh F. Stoddart,
          incorporated by reference to Exhibit 10.13 to the Company's
          Annual Report on Form 10-K for the fiscal year ended
          November 30, 1991.
10.34     Consulting Order, dated as of October 1, 1996, among
          Somanetics Corporation and NeuroPhysics Corporation, Hugh F.
          Stoddart and Hugh A. Stoddart, Ph.D., as Consultants,
          incorporated by reference to Exhibit 10.2 to the Company's
          Quarterly Report on Form 10-Q for the quarter ended August
          31, 1996.
10.35     Amendment to Stock Option Agreement, dated as of February 1,
          1995, between Somanetics Corporation and Gary D. Lewis,
          amending July 21, 1994 Stock Option Agreement, incorporated
          by reference to Exhibit 10.31 to Post-Effective Amendment
          No. 5 to the Company's Registration Statement on Form S-1
          (file no. 33-38438) filed with the Securities and Exchange
          Commission on March 30, 1995.
10.36     Current Form of Somanetics Corporation Confidentiality
          Agreement used for testing hospitals and clinics,
          incorporated by reference to Exhibit 10.22 to the Company's
          Annual Report on Form 10-K for the fiscal year ended
          November 30, 1992.
10.37     Current Form of Somanetics Corporation Confidentiality
          Agreement used for the Company's employees and agents,
          incorporated by reference to Exhibit 10.3 to the Company's
          Quarterly Report on Form 10-Q for the quarter ended August
          31, 1992.
10.38     Assignments, dated October 6, 1983, January 23, 1986,
          February 11, 1986 and February 11, 1986, from Gary D. Lewis
          to Somanetics Corporation in connection with the Company's
          INVOS(R) technology, incorporated by reference to Exhibit
          10.17 to the Company's Registration Statement on Form S-1
          (file no. 33-38438).
10.39     Assignments, dated October 5, 1983, August 28, 1985,
          February 11, 1986, February 12, 1986, and September 24,
          1986, from Hugh F. Stoddart to Somanetics Corporation in
          connection with the Company's INVOS(R) technology,
          incorporated by reference to Exhibit 10.18 to the Company's
          Registration Statement on Form S-1 (file no. 33-38438).
10.40     Warrant Agreement, dated as of August 2, 1994, between
          Somanetics Corporation and Rauscher Pierce & Clark Limited,
          incorporated by reference to Exhibit 10.15 to the Company's
          Quarterly Report on Form 10-Q for the quarter ended August
          31, 1994.
</TABLE>
<PAGE>   82
 
<TABLE>
<CAPTION>
EXHIBIT                           DESCRIPTION
- -------                           -----------
<C>       <S>                                                             <C>
10.41     Form of Warrant to Purchase Common Stock of Somanetics
          Corporation, dated as of August 2, 1994, between Somanetics
          Corporation and Rauscher Pierce & Clark Limited,
          incorporated by reference to Exhibit 10.16 to the Company's
          Quarterly Report on Form 10-Q for the quarter ended August
          31, 1994.
10.42     Form of Warrant, between Somanetics Corporation and
          purchasers of Units in the 1995 Regulation S Offering,
          incorporated by reference to Exhibit 10.4 to the Company's
          Quarterly Report on Form 10-Q for the quarter ended August
          31, 1995.
10.43     Warrant Agreement, dated as of July 14, 1995, between
          Somanetics Corporation and Rauscher Pierce & Clark Limited,
          incorporated by reference to Exhibit 10.5 to the Company's
          Quarterly Report on Form 10-Q for the quarter ended August
          31, 1995.
10.44     Warrant to Purchase Common Stock of Somanetics Corporation,
          dated as of July 14, 1995, between Somanetics Corporation
          and Rauscher Pierce & Clark Limited, incorporated by
          reference to Exhibit 10.6 to the Company's Quarterly Report
          on Form 10-Q for the quarter ended August 31, 1995.
10.45     Engagement Letter, dated as of March 25, 1996, among
          Somanetics Corporation, Rauscher Pierce & Clark Limited and
          Rauscher Pierce & Clark, Inc., incorporated by reference to
          Exhibit 10.57 to Post-Effective Amendment No. 6 to the
          Company's Registration Statement on Form S-1 (file no.
          33-38438).
10.46     Form of Purchase Agreement, between Somanetics Corporation
          and purchasers of Units in the April 1996 Regulation S
          Offering, incorporated by reference to Exhibit 10.2 to the
          Company's Quarterly Report on Form 10-Q for the quarter
          ended February 29, 1996.
10.47     Form of Warrant between Somanetics Corporation and
          purchasers of Units in the April 1996 Regulation S Offering,
          incorporated by reference to Exhibit 10.3 to the Company's
          Quarterly Report on Form 10-Q for the quarter ended February
          29, 1996.
10.48     Warrant Agreement, dated as of April 2, 1996, between
          Somanetics Corporation and Rauscher Pierce & Clark Limited,
          incorporated by reference to Exhibit 10.4 to the Company's
          Quarterly Report on Form 10-Q for the quarter ended February
          29, 1996.
10.49     Warrant to Purchase Common Stock of Somanetics Corporation,
          dated as of April 2, 1996, between Somanetics Corporation
          and Rauscher Pierce & Clark Limited, incorporated by
          reference to Exhibit 10.5 to the Company's Quarterly Report
          on Form 10-Q for the quarter ended February 29, 1996.
10.50     Side Letter, dated as of April 2, 1996, among Somanetics
          Corporation, Rauscher Pierce & Clark Limited and Rauscher
          Pierce & Clark, Inc., incorporated by reference to Exhibit
          10.6 to the Company's Quarterly Report on Form 10-Q for the
          quarter ended February 29, 1996.
10.51     Amendment to Side Letter, dated as of June 18, 1996, among
          Somanetics Corporation, Rauscher Pierce & Clark Limited and
          Rauscher Pierce & Clark, Inc., incorporated by reference to
          Exhibit 10.1 to the Company's Quarterly Report on Form 10-Q
          for the quarter ended May 31, 1996.
10.52     Engagement Letter, dated as of October 23, 1996, among
          Somanetics Corporation, Rauscher Pierce & Clark Limited and
          Rauscher Pierce & Clark, Inc., incorporated by reference to
          Exhibit 10.58 to the Company's Annual Report on Form 10-K
          for the fiscal year ended November 30, 1996.
10.53     Amendment to Engagement Letter, dated as of November 1,
          1996, among Somanetics Corporation, Rauscher Pierce & Clark
          Limited and Rauscher Pierce & Clark, Inc., incorporated by
          reference to Exhibit 10.59 to the Company's Annual Report on
          Form 10-K for the fiscal year ended November 30, 1996.
</TABLE>
<PAGE>   83
 
   
<TABLE>
<CAPTION>
EXHIBIT                           DESCRIPTION
- -------                           -----------
<C>       <S>                                                             <C>
10.54     Form of Purchase Agreement, between Somanetics Corporation
          and purchasers of Units in the November 1996 Regulation S
          Offering, incorporated by reference to Exhibit 10.60 to the
          Company's Annual Report on Form 10-K for the fiscal year
          ended November 30, 1996.
10.55     Placement Agent Agreement, dated as of November 21, 1996,
          among Somanetics Corporation, Rauscher Pierce & Clark
          Limited and Rauscher Pierce & Clark, Inc., incorporated by
          reference to Exhibit 10.61 to the Company's Annual Report on
          Form 10-K for the fiscal year ended November 30, 1996.
10.56     Form of Underwriting Agreement, dated May 30, 1997, between
          Somanetics Corporation and Brean Murray & Co., Inc.,
          incorporated by reference to Exhibit 1.1 to Amendment No. 1
          to the Registration Statement on Form S-1 (file no.
          333-25275), filed with the Securities and Exchange
          Commission on May 30, 1997.
10.57     Form of Warrant Agreement and Warrant, dated June 4, 1997,
          between Somanetics Corporation and Brean Murray & Co., Inc.,
          incorporated by reference to Exhibit 10.60 to Amendment No.
          1 to the Registration Statement on Form S-1 (file no.
          333-25275), filed with the Securities and Exchange
          Commission on May 30, 1997.
10.58     Letter Agreement, dated as of February 20, 1997, between
          Somanetics Corporation and Mitani & Co., LLC, incorporated
          by reference to Exhibit 10.1 to the Company's Quarterly
          Report on Form 10-Q for the quarter ended February 28, 1997.
23.1*     Consent of Deloitte & Touche LLP and Report on Schedule.
23.2*     Consent of Honigman Miller Schwartz and Cohn (included in
          the opinion filed as Exhibit 5.1 to this registration
          statement).
24.1      Powers of Attorney (included after the signature of the
          registrant contained on page II-4 of this registration
          statement).
</TABLE>
    
 
- ---------------
   
*Filed with this amendment.
    

<PAGE>   1
                                                                     EXHIBIT 1.1



                             SOMANETICS CORPORATION
                            2,000,000 Common Shares
                             UNDERWRITING AGREEMENT

                                                                __________, 1998

BREAN MURRAY & CO., INC.
As Representative of the several
Underwriters
570 Lexington Avenue
New York, New York 10022-6822

Ladies and Gentlemen:

     SOMANETICS CORPORATION, a Michigan corporation (the "Company"), proposes
to sell an aggregate of 2,000,000 shares (the "Firm Shares") of the Common
Shares, par value $.01 per share (the "Common Shares"), of the Company, to you
and the other underwriters named in Schedule I hereto (collectively, the
"Underwriters"), for whom you are acting as representative (the
"Representative").  The Company also has agreed to grant to you and the other
Underwriters an option (the "Option") to purchase up to an additional 300,000
Common Shares (the "Option Shares") on the terms and for the purposes set forth
in Section l(b) hereto.  The Firm Shares and the Option Shares are hereinafter
collectively referred to as the "Shares."  The words "you" and "your" refer to
the Representative.

     The Company hereby confirms as follows its agreement with the
Representative and the several other Underwriters.


<PAGE>   2

  1. Agreement to Sell and Purchase.

     (a) On the basis of the representations, warranties and agreements of the
Company herein contained and subject to all the terms and conditions of this
Agreement, the Company agrees to sell to each Underwriter and each Underwriter,
severally and not jointly, agrees to purchase from the Company at a purchase
price of $______ per share, the number of Firm Shares set forth opposite the
name of such Underwriter on Schedule I hereto, plus such additional number of
Shares which such Underwriter may become obligated to purchase pursuant to
Sections 1(b) or 10 hereof.

     (b) Subject to all the terms and conditions of this Agreement, the Company
grants the Option to the several Underwriters to purchase, severally and not
jointly, the Option Shares at the same price per share as the Underwriters
shall pay for the Firm Shares.  The Option may be exercised only to cover
over-allotments in the sale of the Firm Shares by the Underwriters and may be
exercised in whole or in part at any time and from time to time on or before
the 30th day after the date of this Agreement (or on the next business day if
the 30th day is not a business day), upon notice (the "Option Shares Notice")
in writing or by telephone (confirmed in writing) by the Representative to the
Company no later than 5:00 p.m., New York City time, at least two and no more
than five business days before the date specified for closing in the Option
Shares Notice (the "Option Closing Date") setting forth the aggregate number of
Option Shares to be purchased on the Option Closing Date.  (As used herein,
"business day" means a day on which the New York Stock Exchange is open for
trading and on which banks in New York are open for business and not permitted
by law or executive order to be closed.)  On the Option Closing Date, the
Company will sell to the Underwriters the number of Option Shares set forth in
the Option Shares Notice, and each Underwriter will purchase such percentage of
the Option Shares as is equal to the percentage of Firm Shares that such
Underwriter is purchasing, as adjusted by the Representative in such manner as
it deems advisable to avoid fractional shares.

  2. Delivery and Payment.

     (a) Delivery of the Firm Shares shall be made to the Representative for
the accounts of the Underwriters at the office of Brean Murray & Co., Inc., 570
Lexington Avenue, New York, New York 10022-6822, and in exchange therefor
payment of the purchase price shall be made to the Company by wire transfer of
immediately available funds to the Company's account at NBD Bank, 611 Woodward
Avenue, Detroit, Michigan  48226, ABA No. 072000326, Account No. 005611024 (the
"Closing").  Such delivery and payment shall be made at 10:00 a.m., New York
time, on the third business day following the date of this Agreement, or at
such other time on such other date as may be agreed upon by the Company and the
Representative (such date is hereinafter referred to as the "Closing Date").
Time shall be of the essence, and delivery at the time and place specified
pursuant to this Agreement is a further condition of the obligations of each
Underwriter hereunder.

     (b) To the extent the Option is exercised, delivery of the Option Shares
against payment by the Underwriters (in the manner specified above) will take
place at the

                                     - 2 -


<PAGE>   3


offices specified above for the Closing at the time and date (which may be the
Closing Date) specified in the Option Shares Notice.

     (c) Certificates evidencing the Shares shall be in definitive form and
shall be registered in such names and in such denominations as the
Representative shall request at least two business days prior to the Closing
Date or the Option Closing Date, as the case may be, by written notice to the
Company.  For the purpose of expediting the checking and packaging of
certificates for the Shares, the Company agrees to make such certificates
available for inspection at least 24 hours prior to the Closing Date or the
Option Closing Date, as the case may be.

     (d) The cost of original issue tax stamps, if any, in connection with the
issuance, sale and delivery of the Shares by the Company to the respective
Underwriters shall be borne by the Company.  The Company will pay and save each
Underwriter and any subsequent holder of the Shares harmless from any and all
liabilities with respect to or resulting from any failure or delay in paying
Federal or state stamp and other transfer taxes, if any, which may be payable
or determined to be payable in connection with the issuance, sale or delivery
to such Underwriter of the Shares.

  3. Representations and Warranties of the Company.  The Company represents,
warrants and covenants to each Underwriter that:

     (a) A registration statement on Form S-1 (Registration No. 333-47225)
relating to the Shares, including a preliminary prospectus relating to the
Shares and such amendments to such registration statement as may have been
required to the date of this Agreement, has been prepared by the Company under
the provisions of the Securities Act of 1933, as amended (the "Act"), and the
rules and regulations (collectively referred to as the "Rules and Regulations")
of the Securities and Exchange Commission (the "Commission") promulgated
thereunder and has been filed with the Commission.  The Commission has not
issued any order preventing or suspending the use of the Prospectus (as defined
below) or any Preliminary Prospectus (as defined below) or instituted or, to
the knowledge of the Company, threatened any proceeding for that purpose.  The
term "Preliminary Prospectus" as used herein means a preliminary prospectus
relating to the Shares included at any time as part of the foregoing
registration statement or any amendment thereto before it became effective
under the Act and any prospectus filed with the Commission by the Company
pursuant to Rule 424(a) of the Rules and Regulations.  Copies of such
registration statement and amendments and of each related Preliminary
Prospectus have been delivered to the Representative.  If such registration
statement has not become effective, a further amendment to such registration
statement, including a form of final Preliminary Prospectus, necessary to
permit such registration statement to become effective will be filed promptly
by the Company with the Commission.  If such registration statement has become
effective, a final prospectus relating to the Shares containing information
permitted to be omitted at the time of effectiveness by Rule 430A of the Rules
and Regulations will be filed by the Company with the Commission in accordance
with Rule 424(b) of the Rules and Regulations promptly after execution and
delivery of this Agreement.  The term "Registration Statement" means the
registration statement at the time such registration statement becomes or
became

                                     - 3 -


<PAGE>   4

effective (the "Effective Date"), together with any registration statement
filed by the Company pursuant to Rule 462(b) of the Rules and Regulations,
including all financial statements and schedules and all exhibits, documents
incorporated therein by reference and all information contained in any final
prospectus filed with the Commission pursuant to Rule 424(b) of the Rules and
Regulations or in a term sheet described in Rule 434 of the Rules and
Regulations in accordance with Section 5 hereof and deemed to be included
therein as of the Effective Date by Rule 430A of the Rules and Regulations.
The term "Prospectus" means the prospectus relating to the Shares as first
filed with the Commission pursuant to Rule 424(b) of the Rules and Regulations
or, if no such filing is required, the form of final prospectus relating to the
Shares included in the Registration Statement at the Effective Date.
References herein to any document or other information incorporated by
reference in the Registration Statement shall include documents or other
information incorporated by reference in the Prospectus (or if the Prospectus
is not in existence, in the most recent Preliminary Prospectus).  References
herein to any Preliminary Prospectus or the Prospectus shall be deemed to
include all documents and information incorporated by reference therein and
shall be deemed to refer to and include any documents and information filed
after the date of such Preliminary Prospectus or Prospectus, as the case may
be, and so incorporated by reference, under the Securities Exchange Act of
1934, as amended (the "Exchange Act").

     (b) On the date that any Preliminary Prospectus was filed with the
Commission, the date the Prospectus is first filed with the Commission pursuant
to Rule 424(b) of the Rules and Regulations (if required), at all times
subsequent thereto up to and including the Closing Date and, if later, the
Option Closing Date and when any post-effective amendment to the Registration
Statement becomes effective or any amendment or supplement to the Prospectus is
filed with the Commission, the Registration Statement, each Preliminary
Prospectus and the Prospectus (as amended or as supplemented if the Company
shall have filed with the Commission any amendment or supplement thereto),
including the financial statements included in the Prospectus, did or will
comply in all material respects with all applicable provisions of the Act and
the Rules and Regulations and did or will contain all material statements
required to be stated therein in accordance with the Act and the Rules and
Regulations.  On the Effective Date and when any post-effective amendment to
the Registration Statement becomes effective, no part of the Registration
Statement or any such amendment did or will contain any untrue statement of a
material fact or omit to state a material fact required to be stated therein or
necessary in order to make the statements therein not misleading.  At the
Effective Date, the date the Prospectus or any amendment or supplement to the
Prospectus is filed with the Commission and at the Closing Date and, if later,
the Option Closing Date, the Prospectus did not or will not contain any untrue
statement of a material fact or omit to state a material fact necessary to make
the statements therein, in the light of the circumstances under which they were
made, not misleading.  The foregoing representations and warranties in this
Section 3(b) do not apply to any statements or omissions made in reliance on
and in conformity with information furnished in writing to the Company by the
Representative specifically for inclusion in the Registration Statement or
Prospectus or any amendment or supplement thereto.  There are no contracts or
other documents required to be filed as exhibits to the Registration Statement
by the Act or the Rules and Regula-

                                     - 4 -


<PAGE>   5

tions that have not been so filed.  The documents which are
incorporated by reference in any Preliminary Prospectus or the Prospectus or
from which information is so incorporated by reference, when they became
effective or were filed with the Commission, as the case may be, complied in
all material respects with the requirements of the Act and the Rules and
Regulations or the Exchange Act and the rules and regulations thereunder, as
applicable, and did not, when such documents were so filed, contain any untrue
statement of a material fact or omit to state a material fact required to be
stated therein or necessary in order to make the statements therein, in light
of the circumstances under which they were made, not misleading, and any
documents so filed and incorporated by reference subsequent to the Effective
Date shall, when they are filed with the Commission, conform in all material
respects with the requirements of the Act and the Rules and Regulations and the
Exchange Act and the rules and regulations thereunder, as applicable.

     (c) The Company has no subsidiaries.  The Company does not own and, at the
Closing Date and the Option Closing Date, if any, will not own, an interest in
any corporation, joint venture, trust, partnership or other business entity.
The Company has been and, at the Closing Date and Option Closing Date, if any,
will be, duly incorporated and validly existing as a corporation under the laws
of the State of Michigan and is, and at the Closing Date and the Option Closing
Date, if any, will be, in good standing under the laws of the State of
Michigan.  The Company has all corporate power and authority necessary to own
its properties and conduct its business as currently being carried on and as
described in the Registration Statement and Prospectus.  The Company is, and at
the Closing Date and the Option Closing Date, if any, will be, duly licensed or
qualified and in good standing as a foreign corporation in each jurisdiction in
which the character or location of its properties (owned, leased or licensed)
or the nature or conduct of its business or use of its property and assets
makes such licensing or qualification necessary.  Complete and correct copies
of the Company's Restated Articles of Incorporation and Bylaws, in each case as
amended, have been delivered to the Representative or its counsel, and no
changes therein will be made subsequent to the date hereof and prior to the
Closing Date or, if later, the Option Closing Date.

     (d) The outstanding shares of capital stock of the Company have been duly
authorized and validly issued and are fully paid and nonassessable and are not
subject to any preemptive or similar rights, and the holders thereof are not
subject to personal liability by reason of being such holders.  The Firm Shares
to be sold hereunder to the Underwriters, and the Option Shares to be sold
hereunder to the Underwriters in the event the Option is exercised, will be
duly authorized and, when issued and delivered to the Underwriters against
payment therefor as provided by this Agreement, will be validly issued, fully
paid and nonassessable and will not be subject to any preemptive or similar
rights, and the holders thereof will not be subject to personal liability by
reason of being such holders.  The Company has, and, upon completion of the
sale of the Shares, will have, an authorized, issued and outstanding
capitalization as set forth in the Registration Statement and the Prospectus
under the captions "Description of Capital Stock" and "Capitalization" (or, if
the Prospectus is not in existence, in the most recent Preliminary Prospectus).
The description of the securities of the Company in the Registration Statement
and 

                                     - 5 -


<PAGE>   6

the Prospectus under the caption "Description of Capital Stock" (or, if
the Prospectus is not in existence, in the most recent Preliminary Prospectus)
is, and at the Closing Date and, if later, the Option Closing Date, will be,
complete and accurate in all material respects. Except as set forth or
contemplated in the Registration Statement and the Prospectus (or, if the
Prospectus is not in existence, in the most recent Preliminary Prospectus), the
Company does not have outstanding and, at the Closing Date and, if later, the
Option Closing Date, will not have outstanding, any options to purchase, or any
rights or warrants to subscribe for, or any securities or obligations
exchangeable or convertible into, or any contracts or commitments to issue or
sell, any shares of its capital stock or any such options, rights, warrants,
obligations, contracts or commitments.  Neither the filing of the Registration
Statement nor the offering or sale of the Shares as contemplated by this
Agreement gives rise to any rights for or relating to the registration of any
Common Shares or other securities of the Company, except such rights as have
been disclosed in the Registration Statement or as have been satisfied, waived
or terminated.

     (e) The financial statements and the related notes of the Company included
in the Registration Statement and in the Prospectus (or, if the Prospectus is
not in existence, in the most recent Preliminary Prospectus) or incorporated
therein by reference comply in all material respects with the requirements of
the Act and the Rules and Regulations, present fairly the financial condition,
results of operations, shareholders' equity and cash flows of the Company at
the dates and for the periods covered thereby and have been prepared in
accordance with generally accepted accounting principles ("GAAP") applied on a
consistent basis throughout the entire periods involved (except as otherwise
stated therein), subject to year-end adjustments with respect to interim
information consistent with past practice.  Deloitte & Touche LLP (the
"Accountants"), who have reported on those of such financial statements and
related notes which are audited, are independent accountants with respect to
the Company as required by the Act and the Rules and Regulations.  The selected
financial information and statistical data set forth under the captions
"Prospectus Summary --  Summary Financial Data" and "Selected Financial Data"
in the Prospectus (or, if the Prospectus is not in existence, in the most
recent Preliminary Prospectus) have been prepared on a basis consistent with
the financial statements of the Company.

     (f) The Company maintains a system of internal accounting controls
sufficient to provide reasonable assurance that (i) transactions are executed
in accordance with management's general or specific authorization, (ii)
transactions are recorded as necessary to permit preparation of financial
statements in conformity with GAAP and to maintain accountability for assets,
(iii) access to assets is permitted only in accordance with management's
general or specific authorization and (iv) the recorded accountability for
assets is compared with existing assets at reasonable intervals and appropriate
action is taken with respect to any differences.

     (g) Except as set forth or contemplated in the Registration Statement and
Prospectus (or, if the Prospectus is not in existence, in the most recent
Preliminary Prospectus), subsequent to the respective dates as of which
information is given in the Registration Statement and the Prospectus and prior
to the Closing Date and, if later, the Option Closing Date, (i) there 

                                     - 6 -


<PAGE>   7

has not been, and will not have been, any material adverse change in
the business, properties, prospects, key personnel, condition (financial or
otherwise), net worth or results of operations of the Company, (ii) the Company
has not, and will not have, incurred any material liabilities or obligations,
direct or contingent, or, entered into any material transactions not in the
ordinary course of business other than pursuant to this Agreement, (iii) the
Company has not, and will not have, paid or declared any dividends or other
distributions of any kind on any class of its capital stock, and (iv) there has
not been, and will not have been, any change in the capital stock, or a
material change in the short-term or long-term debt, or any issuance of
options, warrants, convertible securities or other rights to purchase capital
stock of the Company, other than changes in capital stock and issuances of
rights, options and shares pursuant to the Company's 1983 Stock Option Plan,
1991 Incentive Stock Option Plan, 1993 Director Stock Option Plan and the 1997
Stock Option Plan (collectively, the "Option Plans") or this Agreement.

     (h) The Company has good and marketable title to all properties and assets
described in the Registration Statement and Prospectus (or, if the Prospectus
is not in existence, in the most recent Preliminary Prospectus), as owned by
it, free and clear of all liens, security interests, restrictions, pledges,
encumbrances, charges, equities, claims, easements, leases and tenancies
(collectively, "Encumbrances") other than those described or referred to in the
Registration Statement and Prospectus (or, if the Prospectus is not in
existence, in the most recent Preliminary Prospectus).  The Company has valid,
subsisting and enforceable leases for the properties and assets described in
the Registration Statement and Prospectus (or, if the Prospectus is not in
existence, in the most recent Preliminary Prospectus) as leased by it, free and
clear of all Encumbrances, other than those described or referred to in the
Registration Statement and Prospectus (or, if the Prospectus is not in
existence, in the most recent Preliminary Prospectus).  The Company has no
notice of any claim which has been asserted by anyone adverse to the Company's
rights as lessee or sublessee under the respective lease or sublease, or
affecting or questioning the Company's right to the continued possession of the
leased or subleased premises.

     (i) Except as described or referred to in the Registration Statement or
Prospectus (or, if the Prospectus is not in existence, in the most recent
Preliminary Prospectus), the Company owns or possesses all patents, patent
applications, trademarks, service marks, tradenames, trademark registrations,
service mark registrations, copyrights, licenses, inventions, trade secrets and
other intellectual property rights necessary for the conduct of the business of
the Company as currently carried on and as described in the Registration
Statement and Prospectus (or, if the Prospectus is not in existence, in the
most recent Preliminary Prospectus), and except as stated or referred to in the
Registration Statement or Prospectus (or, if the Prospectus is not in
existence, in the most recent Preliminary Prospectus), no name which the
Company uses and no other aspect of the business of the Company will involve or
give rise to any infringement of or license or similar fees for, any patents,
patent applications, trademarks, service marks, tradenames, trademark
registrations, service mark registrations, copyrights, licenses, inventions,
trade secrets or other similar rights of others material to the business or
prospects of the Company, and the Company has not received any notice alleging
any such infringement or fee.


                                     - 7 -


<PAGE>   8

     (j) Except as set forth or referred to in the Registration Statement and
Prospectus (or, if the Prospectus is not in existence, in the most
recent Preliminary Prospectus), there are no actions, suits, arbitrations,
claims, governmental or other proceedings (formal or informal), or
investigations pending or, to the knowledge of the Company, threatened against
or, to the knowledge of the Company, affecting the Company, any of the
Company's officers, directors or shareholders, in its capacity as such, or any
of the properties or assets owned or leased by the Company, before or by any
Federal, state, municipal or foreign court, commission, regulatory body,
administrative agency or other governmental body, including, without
limitation, the United States Food and Drug Administration (the "FDA"),
domestic or foreign (collectively, a "Governmental Body"), which might result
in any material adverse change in the business, properties, prospects,
condition (financial or otherwise), net worth or results of operations of the
Company.  There are no actions, proceedings or investigations pending or, to
the knowledge of the Company, threatened by the FDA or any other Governmental
Body relating to the safety, efficacy or recall of any product developed or
sold by the Company.  The Company is not in violation of, or in default with
respect to, any law, rule or regulation, or any order, judgment or decree,
except as described or referred to in the Prospectus (or if the Prospectus is
not in existence, in the most recent Preliminary Prospectus) or such as in the
aggregate do not now have and can reasonably be expected in the future not to
have a material adverse effect upon the business, properties, prospects,
condition (financial or otherwise), net worth or results of operations of the
Company; nor is the Company presently required to take any action under any
such order, judgment or decree in order to avoid any such violation or default.

     (k) The Company has, and at the Closing Date and, if later, the Option
Closing Date will have, all governmental licenses, permits, consents, orders,
approvals, franchises, certificates and other authorizations (collectively,
"Licenses") and has made all requisite declarations, notifications and filings
with all Government Bodies, in each case as are necessary to carry on its
business as then currently conducted and own or lease its properties as
contemplated in the Registration Statement and Prospectus (or, if the
Prospectus is not in existence, in the most recent Preliminary Prospectus), and
all such Licenses are, and at the Closing Date and, if later, the Option
Closing Date will be, in full force and effect.  The Company has, and at the
Closing Date and, if later, the Option Closing Date will have, complied in all
material respects with all laws, regulations and orders applicable to it or its
business, assets and properties.  The Company is not, nor at the Closing Date
and, if later, the Option Closing Date will it be, in violation of its Restated
Articles of Incorporation or Bylaws, in each case as amended, or in default
(nor has any event occurred which, with notice or lapse of time or both, would
constitute a default) in the due performance and observation of any term,
covenant or condition of any indenture, mortgage, deed of trust, voting trust
agreement, loan agreement, bond, debenture, note agreement or other evidence of
indebtedness, lease, contract or other agreement or instrument (collectively, a
"contract or other agreement") to which it is a party or by which its
properties are bound, the violation of which would individually or in the
aggregate have a material adverse effect on the business, properties,
prospects, condition (financial or otherwise), net worth or results of
operations of the Company.  There are no governmental proceedings or actions
pending or, to the Company's knowledge, threatened for the purpose of

                                     - 8 -


<PAGE>   9



suspending, modifying or revoking any License held by the Company and,
to the knowledge of the Company, no event has occurred that allows, or with
notice or lapse of time or both would  allow, any such suspension, modification
or revocation or any material impairment of the Company's rights thereunder.

     (l) No consent, approval, authorization or order of, or any filing or
declaration with, any Governmental Body is required for the execution, delivery
or performance of this Agreement or for the consummation of the transactions
contemplated hereby or in connection with the sale of the Shares by the
Company, except such as have been obtained and are in full force and effect and
such as may be required under the Act, the Rules and Regulations, any state
securities or Blue Sky laws or the bylaws and rules of the National Association
of Securities Dealers, Inc. (the "NASD") in connection with the purchase and
distribution by the Underwriters of the Shares to be sold hereby.

     (m) The Company has full power (corporate and other) and authority to
enter into this Agreement and to carry out all the terms and provisions hereof
to be carried out by it.  This Agreement has been duly authorized, executed and
delivered by the Company and constitutes a valid and binding agreement of the
Company, and is enforceable against the Company in accordance with its terms,
except as rights to indemnity and contribution may be limited by Federal or
state securities laws or the public policy underlying such laws.  Except as
disclosed in the Registration Statement and the Prospectus (or, if the
Prospectus is not in existence, in the most recent Preliminary Prospectus), the
execution, delivery and the performance of this Agreement and the consummation
of the transactions contemplated hereby will not result in the creation or
imposition of any Encumbrance upon any of the properties or assets of the
Company pursuant to the terms or provisions of, or result in a breach or
violation of or conflict with any of the terms or provisions of, or constitute
a default under, or give any other party a right to terminate any of its
obligations under, or result in the acceleration of any obligation under, (i)
the Restated Articles of Incorporation or Bylaws of the Company, in each case
as amended, or (ii) any contract or other agreement to which the Company is a
party or by which it or any of its assets or properties are bound, or (iii) any
judgment, ruling, decree, order, law, statute, rule or regulation of any
Governmental Body applicable to the Company or its business or properties,
assuming compliance with applicable state securities and Blue Sky laws.

     (n) No statement, representation, warranty or covenant made by the Company
in this Agreement or made in any certificate or document required hereby to be
delivered to the Representative was or will be, when made, inaccurate, untrue
or incorrect in any material respect.  Each certificate signed by an officer of
the Company and delivered to the Representative or counsel for the Underwriters
shall be deemed to be a representation and warranty by the Company to each
Underwriter as to the matters covered thereby.

     (o) Neither the Company nor any of its directors, officers or affiliates
(within the meaning of the Rules and Regulations) has taken, nor will he, she
or it take, directly or indirectly, any action designed, or which might
reasonably be expected in the future, to cause or 


                                     - 9 -


<PAGE>   10

result in, under the Act or otherwise, or which has constituted,
stabilization or manipulation of the price of any security of the Company to
facilitate the sale or resale of the Shares or otherwise.       

     (p) The Company is not involved in any material labor dispute with its
employees nor is any such dispute threatened or imminent.

     (q) Neither the Company nor, to the Company's knowledge, any employee or
agent of the Company has made any payment of funds of the Company or received
or retained any funds of the Company in violation of any law, rule or
regulation or of a character required to be disclosed in the Registration
Statement and Prospectus (or, if the Prospectus is not in existence, in the
most recent Preliminary Prospectus).

     (r) The business, operations and facilities of the Company have been and
are being conducted in compliance in all material respects with all applicable
laws, ordinances, rules, regulations, licenses, permits, approvals, plans,
authorizations or requirements relating to occupational safety and health, or
pollution, or protection of health or the environment (including, without
limitation, those relating to emissions, discharges, releases or threatened
releases of pollutants, contaminants or hazardous or toxic substances,
materials or wastes into ambient air, surface water, groundwater or land, or
relating to the manufacture, processing, distribution, use, treatment, storage,
disposal, transport or handling of chemical substances, pollutants,
contaminants or hazardous or toxic substances, materials or wastes, whether
solid, gaseous or liquid in nature) of any governmental department, commission,
board, bureau, agency or instrumentality of the United States or any state or
political subdivision thereof, or any foreign jurisdiction, and all applicable
judicial or administrative agency or regulatory decrees, awards, judgments and
orders relating thereto; and the Company has not received any notice from any
Governmental Body or any third party alleging any violation thereof or material
liability thereunder (including, without limitation, liability for costs of
investigating or remediating sites containing hazardous substances and/or
damages to natural resources).  The intended use and occupancy of each of the
facilities owned or operated by the Company complies in all material respects
with all applicable codes and zoning laws and regulations, and there is no
pending or, to the Company's knowledge, threatened condemnation, zoning change,
environmental or other proceeding or action that will in any material respect
adversely affect the size of, use of, improvements on, construction on or
access to such facilities.

     (s) The Company has filed all foreign, Federal, state and local tax
returns that are required to be filed or has requested extensions thereof and
is not in default in any taxes which were payable pursuant to said returns.

     (t) Neither the Company nor any of its directors, officers or employees in
such capacity is subject to any order or directive of, or party to any
agreement with, any regulatory agency having jurisdiction with respect to its
business or operations except as disclosed in the Prospectus (or if the
Prospectus is not in existence, in the most recent Preliminary Prospectus).


                                     - 10 -


<PAGE>   11

     (u) The Company and each officer and director of the Company have
delivered to the Representative agreements (the "Lockup Agreements") to the
effect that he, she or it will not, for a period of 180 days after the date
hereof, without the prior written consent of the Representative, directly or
indirectly, offer, sell or otherwise dispose (or announce any offer,
sale, grant of any option to purchase or other disposition) of any Common
Shares or securities convertible into, or exercisable or exchangeable for,
Common Shares, except pursuant to this Agreement and except for (i) exercises
of options and warrants to acquire Common Shares, (ii) transfers to the
holder's spouse or lineal descendants or ancestors, natural or adopted
(collectively, "Relatives"), or to an inter vivos trust for the benefit of such
holder's Relatives, (iii) transfers upon the death of such holder pursuant to
the laws of descent and distribution or pursuant to wills, or (iv) gifts,
provided that, in the case of the foregoing clauses (i) through (iv), the
transferor agrees in writing to be bound by the terms of these restrictions.

     (v) The Company has not distributed and will not distribute any prospectus
or other offering material in connection with the offering and sale of the
Shares other than any Preliminary Prospectus or the Prospectus or other
materials permitted by the Act or the Rules and Regulations to be distributed
by the Company.

     (w) The Common Shares of the Company are quoted on The Nasdaq SmallCap
Market.

     (x) The Company is not required to be registered under the Investment
Company Act of 1940, as amended (the "Investment Company Act").

     (y) The Company has furnished the Representative with true and complete
copies of its report on Form 10-K for the fiscal year ended November 30, 1997,
its Proxy Statement for use in connection with its 1998 Annual Meeting of
Shareholders and its 1997 Annual Report to Shareholders (the "Current
Reports"), which Current Reports constitute the only documents that the Company
was required to file with the Commission since November 30, 1997.  The Company
has also filed all other reports required to be filed with the Commission prior
to November 30, 1997 (such reports, together with the Current Reports are
collectively referred to as the "Commission Reports").  As of their respective
filing dates, the Commission Reports and all other filings made by the Company
under the Act or Exchange Act complied in all material respects with the
requirements of the Act or the Exchange Act, as the case may be, and none of
such filings contained any untrue statement of a material fact or omitted to
state any material fact required to be stated therein or necessary to make the
statements therein, in light of the circumstances under which they were made,
not misleading.

     (z) Since its inception, the Company has not incurred any material
liability resulting from a violation of the provisions of the Act or any state
securities or Blue Sky laws.

     (aa) The Company has made available to the Representative a copy of all
premarket notification ("510(k)") and premarket approval ("PMA") concurrence or
clearance 


                                     - 11 -


<PAGE>   12

letters received from the FDA and all related documents and information, 
including device master files and market studies.

     (bb) The Company carries, or is covered by, insurance in such amounts and
covering such risks as is adequate for the conduct of its business and the
value of its properties.                                             

     (cc) The Company is in compliance in all material respects with all
presently applicable provisions of the Employee Retirement Income Security Act
of 1974, as amended, including the regulations and published interpretations
thereunder ("ERISA"); no "reportable event" (as defined in ERISA) has occurred
with respect to any "pension plan" (as defined in ERISA) for which the Company
would have any material liability; the Company has not incurred and does not
expect to incur liability under (i) Title IV of ERISA with respect to
termination of, or withdrawal from, any "pension plan" or (ii) Sections 412 or
4971 of the Internal Revenue Code of 1986, as amended, including the
regulations and published interpretations thereunder (the "Code"); and each
"pension plan" for which the Company would have any liability that is intended
to be qualified under Section 401(a) of the Code is so qualified in all
material respects and nothing has occurred, whether by action or by failure to
act, which would cause the loss of such qualification.

  4. Representations and Warranties of the Underwriters.  Upon your
authorization of the release of the Firm Shares, the several Underwriters
propose to offer the Firm Shares for sale to the public upon the terms set
forth in the Prospectus.  The Representative represents and warrants to the
Company that, assuming compliance by the Company with all relevant provisions
of the Act in connection with the Registration Statement, the Representative
will conduct all offers and sales of the Shares in compliance with the relevant
provisions of the Act and the Rules and Regulations, all applicable state
securities laws and regulations and the bylaws and rules of the NASD.  The
Representative represents and warrants to the Company that the Representative
has been authorized by the several Underwriters to enter into this Agreement on
their behalf and to act for them in the manner provided in this Agreement.

  5. Agreements of the Company.  The Company covenants and agrees with each
of the several Underwriters as follows:

     (a) The Company will not, either prior to the Effective Date or thereafter
during such period as the Prospectus is required by law to be delivered in
connection with sales of the Shares by an Underwriter or dealer, file any
amendment or supplement to the Registration Statement or the Prospectus, unless
a copy thereof shall first have been submitted to the Representative and the
Representative shall have consented thereto.

     (b) If the Registration Statement is not yet effective, the Company will
use its best efforts to cause the Registration Statement to become effective
not later than the time indicated in Section 7(a) hereof.  The Company will
notify the Representative promptly, and will confirm such advice in writing,
(i) when the Registration Statement has become effective (if later than the
date hereof) and when any post-effective amendment thereto becomes effective,
(ii) of 

                                     - 12 -


<PAGE>   13


any request by the Commission for amendments or supplements to the
Registration Statement or the Prospectus or for additional information, (iii)
of the issuance by the Commission of any stop order suspending the
effectiveness of the Registration Statement or any post-effective amendment
thereto or any order suspending the use of any Preliminary Prospectus or the
Prospectus or any amendment or supplement thereto or the initiation of any
proceedings for any such purpose or the threat thereof, (iv) of the happening
of any event during the period mentioned in the first sentence of Section 5(f)
that in the reasonable judgment of the Company makes any statement of a
material fact made in the Registration Statement or the Prospectus untrue or
that requires the making of any changes in the Registration Statement or the
Prospectus in order to make the statements of material fact therein, in light
of the circumstances in which they are made, not misleading and (v) of receipt
by the Company or any representative or attorney of the Company during the
period mentioned in the first sentence of Section 5(f) of any other
communication from the Commission relating to the Company, the Registration
Statement, any Preliminary Prospectus or the Prospectus.  The Company will use
its best efforts to prevent the issuance of any order suspending the
effectiveness of the Registration Statement or any post-effective amendment
thereto or any order suspending the use of any Preliminary Prospectus or the
Prospectus or any amendment or supplement thereto, and, if any such order is
issued, the Company will use its best efforts to obtain the withdrawal of such
order at the earliest possible moment. The Company will prepare the Prospectus
in a form approved by the Representative and will file such Prospectus pursuant
to Rule 424(b) of the Rules and Regulations not later than the Commission's
close of business on the second business day following the execution and
delivery of this Agreement or, if applicable, such earlier time as may be
required by Rule 430A(a)(3) of the Rules and Regulations.  If the Company has
omitted any information from the Registration Statement pursuant to Rule 430A
of the Rules and Regulations, the Company will use its best efforts to comply
with the provisions of and make all requisite filings with the Commission
pursuant to Rule 430A of the Rules and Regulations and to notify the
Representative promptly of all such filings.

     (c) If, at any time when a Prospectus relating to the Shares is required
to be delivered under the Act, any event has occurred as a result of which the
Prospectus, as then amended or supplemented, would include any untrue statement
of a material fact or omit to state a material fact necessary in order to make
the statements therein, in the light of the circumstances under which they were
made, not misleading, or the Registration Statement, as then amended or
supplemented, would include any untrue statement of a material fact or omit to
state a material fact necessary to make the statements therein not misleading,
or if for any other reason it is necessary at any such time to amend or
supplement the Prospectus or the Registration Statement to comply with the Act
or the Rules and Regulations, the Company will promptly notify the
Representative thereof and, in accordance with Section 5(a) hereof, will
prepare and file with the Commission, at the Company's expense, an amendment to
the Registration Statement or an amendment or supplement to the Prospectus that
corrects such statement or omission or effects such compliance.



                                     - 13 -


<PAGE>   14

     (d) The Company will furnish to the Representative, without charge, two
signed copies of the Registration Statement and of any post-effective amendment
thereto, including financial statements and schedules, and all exhibits
thereto, other than exhibits incorporated by reference, and will furnish to the
Representative, without charge, for transmittal to each of the other
Underwriters, copies of the Registration Statement and any post-effective
amendment thereto, including financial statements and schedules but without
exhibits.

     (e) The Company will comply with all the provisions of all undertakings
contained in the Registration Statement.

     (f) On the Effective Date, and thereafter from time to time for such
period as the Prospectus is required by the Act to be delivered, the Company
will deliver to each of the Underwriters, without charge, as many copies of the
Prospectus or any amendment or supplement thereto as the Representative may
reasonably request.  The Company consents to the use of the Prospectus or any
amendment or supplement thereto by the several Underwriters and by all dealers
to whom the Shares may be sold, both in connection with the offering or sale of
the Shares and for any period of time thereafter during which the Prospectus is
required by law to be delivered in connection therewith.  If during such period
of time any event shall occur which in the judgment of the Company or counsel
to the Underwriters should be set forth in the Prospectus in order to make any
statement of a material fact therein, in the light of the circumstances under
which it was made, not misleading, or in the Registration Statement in order to
make any statement of a material fact therein not misleading, or if it is
necessary to supplement or amend the Prospectus or the Registration Statement
to comply with law, the Company will, in accordance with Section 5(a) hereof,
forthwith prepare and duly file with the Commission an appropriate supplement
or amendment thereto and will deliver to each of the Underwriters, without
charge, such number of copies thereof as the Representative may reasonably
request.

     (g) The Company will (i) take or cause to be taken all such actions and
furnish all such information as the Representative may reasonably request in
order to qualify the Shares for offer and sale under the state securities or
Blue Sky laws of such jurisdictions as the Representative may designate, (ii)
continue such qualifications in effect for as long as may be necessary to
complete the distribution of the Shares but not to exceed one year from the
date of this Agreement and (iii) make such applications, file such documents
and furnish such information as may be required for the purposes set forth in
the foregoing clauses (i) and (ii); provided, that in no event shall the
Company be obligated to qualify to do business in any jurisdiction where it is
not now so qualified or to take any action which would subject it to general
service of process or to taxation in any jurisdiction where it is not now so
subject.

     (h) During the period of five years commencing on the Effective Date, the
Company will furnish to the Representative and each other Underwriter who may
so request copies of such financial statements and other periodic and special
reports as the Company may from time to time distribute generally to the
holders of any class of its capital stock and will 


                                     - 14 -


<PAGE>   15


furnish to the Representative and each other Underwriter who may so request a 
copy of each annual or other report it shall be required to file with the 
Commission.
                                                                 
     (i) The Company will make generally available to holders of its
securities, as soon as may be practicable, but in no event later than the last
day of the fifteenth full calendar month following the calendar quarter in
which the Effective Date falls, an earnings statement (which need not be
audited but shall be in reasonable detail) for a period of 12 months
commencing after the Effective Date, and satisfying the provisions of Section
11(a) of the Act (including Rule 158 of the Rules and Regulations).

     (j) The Company will not for a period of 180 days after the date hereof,
without the prior written consent of the Representative, directly or
indirectly, offer, sell or otherwise dispose (or announce any offer, sale,
grant of any option to purchase or other disposition) of any Common Shares or
any securities convertible into, or exercisable or exchangeable for, Common
Shares, except pursuant to Section 1 hereof and except that the Company may
grant options, and issue shares pursuant to the options granted, under the
Company's Option Plans and the Company may issue shares pursuant to warrants
outstanding as of the date of this Agreement.

     (k) The Company will not at any time, directly or indirectly, take any
action intended, or which might reasonably be expected, to cause or result in,
or which will constitute, stabilization of the price of the Common Shares to
facilitate the sale or resale of any of the Shares.

     (l) The Company shall apply the net proceeds of the sale of the Shares as
set forth in the Prospectus.

     (m) The Company shall not invest, or otherwise use, the proceeds received
by the Company from the sale of the Shares to the Underwriters in such a manner
as would require the Company to register as an investment company under the
Investment Company Act.

     (n) The Company will maintain a transfer agent and, if necessary under the
jurisdiction of incorporation of the Company or if required by The Nasdaq Stock
Market, Inc., a registrar for its Common Shares.

     (o) The Company will timely file all such reports, forms or other
documents as may be required from time to time under the Act, the Rules and
Regulations, the Exchange Act, and the rules and regulations promulgated
thereunder, and all such reports, forms and documents filed will comply in all
material respects as to form and substance with the applicable requirements of
the Act, the Rules and Regulations, the Exchange Act, and the rules and
regulations promulgated thereunder.

  6. Expenses.  Whether or not the transactions contemplated by this
Agreement are consummated or this Agreement is terminated, the Company will
pay, or 

                                     - 15 -


<PAGE>   16


reimburse if paid by the Representative, all costs and expenses
incident to the performance of its obligations under this Agreement and the
transactions contemplated by this Agreement, including, but not limited to,
costs and expenses of or relating to (i) the preparation, printing and filing
of the Registration Statement and exhibits thereto, each Preliminary
Prospectus, the Prospectus, any amendment or supplement to the Registration
Statement or the Prospectus, (ii) the preparation and delivery of certificates
representing the Shares, (iii) the printing of this Agreement, the Agreement
among Underwriters, any Dealer Agreements and any Underwriters' Questionnaire,
(iv) furnishing (including costs of shipping and mailing) such copies of the
Registration Statement, the Prospectus and any Preliminary Prospectus, and all
amendments and supplements thereto, as may be requested for use in connection
with the offering and sale of the Shares by the Underwriters or by dealers to
whom Shares may be sold, (v) the quotation of the Shares on The Nasdaq Stock
Market, (vi) any filings required to be made by the Underwriters with the NASD,
(vii) the registration or qualification of the Shares for offer and sale under
the securities or Blue Sky laws of such jurisdictions designated pursuant to
Section 5(g) hereof, including the reasonable fees, disbursements and other
charges of counsel to the Underwriters in connection therewith, and the
preparation and printing of preliminary, supplemental and final Blue Sky
memoranda, (viii) counsel and accountants to the Company and (ix) the transfer
agent, and any registrar, for the Shares.  Whether or not the transactions
contemplated by this Agreement are consummated or if this Agreement shall be
terminated by the Company pursuant to any provisions hereof, the Company will
reimburse the Representative for all of its accountable out-of-pocket fees and
expenses including, among other things, its travel and travel-related expenses
and its counsel fees and expenses, incurred by it in connection herewith, up to
an aggregate amount of $75,000.

  7. Conditions to the Obligations of the Underwriters.  The obligations of
each Underwriter hereunder are subject to the following conditions:

     (a) Notification that the Registration Statement has become effective
shall be received by the Representative not later than 4:00 p.m., New York
time, on the date of this Agreement or at such later date and time as shall be
consented to in writing by the Representative and all filings required prior to
such effectiveness by Rule 424 and Rule 430A of the Rules and Regulations shall
have been made.

     (b) (i) No stop order suspending the effectiveness of the Registration
Statement shall have been issued and no proceedings for that purpose shall be
pending or threatened by the Commission, (ii) no order suspending the
effectiveness of the Registration Statement or the qualification or
registration of the Shares under the securities or Blue Sky laws of any
jurisdiction shall be in effect, and no proceeding for such purpose shall be
pending before or threatened or contemplated by the authorities of any such
jurisdiction, (iii) any request for additional information on the part of the
staff of the Commission or any such authorities shall have been complied with
to the satisfaction of the staff of the Commission or such authorities and (iv)
after the date hereof no amendment or supplement to the Registration Statement
or the Prospectus shall have been filed unless a copy thereof was first
submitted to the Representative and the Representative consented thereto, and
the Representative shall have received certificates, 

                                     - 16 -


<PAGE>   17

dated the Closing Date and the Option Closing Date, if any, and signed
on behalf of the Company by the Chief Executive Officer of the Company and the
Chief Financial Officer of the Company (who may, as to proceedings threatened,
rely upon the best of their information and belief), to the effect of the
foregoing clauses (i), (ii) and (iii).

     (c) Since the respective dates as of which information is given in the
Registration Statement and the Prospectus, (i) there shall not have
been a material adverse change in the general affairs, business, business
prospects, properties, management, condition (financial or otherwise), or
results of operations of the Company, whether or not arising from transactions
in the ordinary course of business, and (ii) the Company shall not have
sustained any material loss or interference with its business, assets or
properties from fire, explosion, flood or other casualty, whether or not
covered by insurance, or from any labor dispute or any court or legislative or
other governmental action, order or decree, which is not set forth in the
Registration Statement and the Prospectus, if in the judgment of the
Representative any such development makes it impracticable or inadvisable to
consummate the sale and delivery of the Shares by the Underwriters at the
public offering price.

     (d) Since the respective dates as of which information is given in the
Registration Statement and the Prospectus, there shall have been no litigation
or other proceeding instituted against the Company or any of its officers,
directors or shareholders in their capacities as such, or any of its assets or
properties, before or by any Governmental Body in which litigation or
proceeding an unfavorable ruling, decision or finding would materially and
adversely affect the general affairs, business, properties, prospects,
condition (financial or otherwise), net worth or results of operations of the
Company.

     (e) Each of the representations and warranties of the Company contained
herein shall be true and correct in all material respects at the date hereof,
at the Closing Date and, with respect to the Option Shares, if any, at the
Option Closing Date, as if made on such date, and all covenants and agreements
contained herein to be performed on the part of the Company and all conditions
contained herein to be fulfilled or complied with by the Company at or prior to
the Closing Date and, with respect to the Option Shares, if any, at or prior to
the Option Closing Date, shall have been fully performed, fulfilled or complied
with in all material respects.

     (f) The Representative shall have received an opinion, dated the Closing
Date and the Option Closing Date, as applicable, from Honigman Miller Schwartz
and Cohn, Detroit, Michigan, counsel for the Company, to the following effect:

         (i)  The Company has been duly incorporated and is validly existing 
and in good standing under the laws of the State of Michigan;

         (ii)  The description of the Common Shares under the caption 
"Description of Capital Stock" in the Prospectus, to the extent that it 
constitutes statements of law or legal conclusions, conforms in all material 
respects to the terms thereof contained in the Company's Restated Articles of
Incorporation, as amended (the "Articles"). The authorized capital stock of 

                                     - 17 -


<PAGE>   18

the Company is as set forth in the Prospectus under the caption
"Capitalization". All of the issued and outstanding Common Shares have been,
and the Shares, when issued, delivered and paid for by the Underwriters in
accordance with the terms of this Agreement, will be, duly authorized, validly
issued, fully paid and nonassessable and will not be subject to any preemptive
or similar right arising under the Michigan Business Corporation Act, as
amended, the Company's Articles or Bylaws, or any agreement listed as an
Exhibit to the Registration Statement (the "Exhibits").  To such counsel's
actual knowledge, neither the filing of the Registration Statement nor the
offering or sale of the Shares pursuant to this Agreement gives rise to any
rights for the registration of any Common Shares or other securities of the
Company pursuant to any of the Exhibits, except as disclosed in the 
Registration Statement, or such rights as have been satisfied, waived or 
terminated;

         (iii)  Based solely on such counsel's review of the minutes of the
meetings of the Company's shareholders and board of directors and committees of
the board of directors and a certificate of officers of the Company (the
"Certificate"), except as described in the Registration Statement and the
Prospectus, there are no options, warrants, agreements, contracts or other
rights in existence to purchase or acquire from the Company any shares of
capital stock of the Company;

         (iv)  The Registration Statement has become effective under the Act; 
and, to such counsel's actual knowledge, (i) no stop order suspending the
effectiveness of the Registration Statement or any amendment thereto has been
issued under the Act, and (ii) no proceedings for that purpose have been
instituted, are pending or are threatened by the Commission under the Act;

         (v)  The Registration Statement and, if any, each amendment thereto and
the Prospectus and, if any, each amendment and supplement thereto (except the
financial statements, schedules and other financial data contained therein, as
to which such counsel need not express any opinion), complies as to form in all
material respects with the requirements of the Act and Rules and Regulations;

         (vi)  The descriptions contained in the Registration Statement and in 
the Prospectus under the captions "Risk Factors -- Potential
Anti-Takeover  Effect", "Business -- Research and Development", "Management --
Directors and Executive Officers", "-- Compensation", and "-- Indemnification
of Directors and Officers", "Certain Transactions", "Description of Capital
Stock", and Notes 7, 8, 9 and 11 of "Notes to Financial Statements" of
statutes, litigation, contracts and other documents, insofar as such
descriptions relate to matters of law, fairly present in all material respects
summaries of such statutes, litigation, contracts and other documents;

         (vii)  To such counsel's actual knowledge, there are no contracts or
documents which are required by the Act to be described in the Registration
Statement or the Prospectus or to be filed as exhibits to the Registration
Statement which are not so described or filed;


                                     - 18 -


<PAGE>   19

         (viii)  Based solely on the Certificate and the results of an inquiry
circulated to the partners of such counsel's firm (the "Inquiry"), such counsel
confirms to you that, to such counsel's actual knowledge, there is not pending
or threatened against the Company any action, suit, arbitration, claim,
governmental or other proceeding (informal or formal) or investigation before
or by any Governmental Body which is required to be disclosed in the
Registration Statement or the Prospectus which is not so disclosed therein;

         (ix)  The Company has the corporate power and authority to execute,
deliver and comply with its obligations under this Agreement and to
consummate the transactions provided for herein; and the execution, delivery
and performance by the Company of this Agreement have been duly authorized by
all requisite corporate action on behalf of the Company, and such counsel shall
confirm to you that this Agreement has been executed and delivered on behalf of
the Company by a duly authorized officer of the Company.

         (x)  The choice of New York law as the governing law contained in this
Agreement would, to the extent specifically pleaded and proved, be recognized
and applied in an action brought before a court of competent jurisdiction in
the State of Michigan or a Federal court applying the laws of the State of
Michigan, except that such court would not apply those laws of the State of New
York (i) which such court characterizes as procedural, (ii) which are revenue
or penal laws, (iii) the application of which would be inconsistent with
"public policy" as such term is understood under the laws of the State of
Michigan, or (iv) with respect to the enforceability, perfection or priority of
a security interest in real or personal property located in Michigan or subject
to Federal law.  However, if this Agreement were stated to be governed by and
construed in accordance with the law of the State of Michigan, or if a Federal
court or a Michigan court were to apply the law of the State of Michigan to
this Agreement, this Agreement would constitute a valid and binding obligation
of the Company and, except for the contribution and indemnification provisions
hereof, as to which such counsel need not express any opinion, would be
enforceable against the Company in accordance with its terms, except as limited
by applicable bankruptcy, insolvency, reorganization, moratorium or other laws
now or hereafter in effect relating to or affecting creditors rights generally
or by general principles of equity relating to the availability of remedies;

         (xi)  The execution and delivery of this Agreement by the Company, 
and the Company's compliance with the terms of this Agreement (i) do
not result in the creation or imposition of any Encumbrance upon any property
or assets of the Company pursuant to the terms or provisions of, or constitute
a breach of, or default under, any material contract or other material
agreement included as an Exhibit to the Registration Statement, and (ii) do not
violate (A) the Articles or Bylaws of the Company, (B) any laws which are known
to such counsel to be applicable to the Company where such violation would
reasonably be expected to have a material adverse effect on the validity,
performance or enforceability of any of the terms of this Agreement applicable
to the Company or relating to the rights and remedies of the Underwriters and
the Representative under this Agreement, or (C) based solely on the Certificate
and the Inquiry, any of the Company's existing obligations under any judgment,
decree or order of any arbitrator or Governmental Body naming the Company; no
consent, approval, authorization or 

                                     - 19 -

<PAGE>   20

order of, or filing with, any Governmental Body is legally required for
the execution, delivery and performance of this Agreement by the Company,
except such as may be required under the Act and the Rules and Regulations,
such as may be required by the bylaws and rules of the NASD in connection with
the purchase and distribution by the Underwriters of the Shares and such as may
be required under state securities or Blue Sky laws in connection with the
purchase and distribution by the Underwriters of the Shares;

         (xii)  To such counsel's actual knowledge, the Company is not in any
breach or violation of any of the terms or provisions of, or in default under
(nor has an event occurred which with notice or lapse of time or both would 
constitute a default or acceleration under), the terms of its Articles or 
Bylaws, in each case as amended;

         (xiii)  To such counsel's actual knowledge, the Company is not an
"investment company" as such term is defined in the Investment Company Act.

     In addition, such counsel shall state that, such counsel has participated
in the preparation of the Registration Statement and the Prospectus and nothing
has come to such counsel's attention that causes such counsel to believe that
the Registration Statement as of the Effective Date and as of the date of such
opinion contained or contains any untrue statement of a material fact or
omitted or omits to state a material fact required to be stated therein or
necessary to make the statements therein not misleading or that the Prospectus
as of the date thereof and as of the date of such opinion, contained or
contains any untrue statement of a material fact or omitted or omits to state a
material fact required to be stated therein or necessary to make the statements
therein, in the light of the circumstances under which they were made, not
misleading (it being understood that such counsel need not make any statement
with respect to the financial statements, schedules and other financial data
included in the Registration Statement or the Prospectus).

     In rendering any such opinion, such counsel may (i) state that such
counsel expresses no opinion as to the laws of any jurisdiction other than the
laws of the State of Michigan and the Federal laws of the United States and
expresses no opinion concerning the FD&C Act (as defined below) or related
rules and regulations or any intellectual property law and (ii) may rely, as to
matters of fact on certificates of responsible officers of the Company and
public officials.

     References to the Registration Statement and the Prospectus in this
paragraph (f) shall include any amendment or supplement thereto at the date of
such opinion.

     (g) The Representative shall have received an opinion, dated the Closing
Date and the Option Closing Date, as applicable, from Hogan & Hartson L.L.P,
Washington, D.C., special FDA counsel for the Company, to the following effect:

         (i)  The statements in the Prospectus under the captions "Risk 
Factors -- Government Regulation" and "Business -- Government
Regulation," insofar as such statements 

                                     - 20 -


<PAGE>   21

purport to summarize applicable provisions of the Federal Food, Drug,
and Cosmetic Act (the "FD&C Act") and the regulations promulgated thereunder,
are accurate summaries in all material respects of the provisions purported to
be summarized under such captions in the Prospectus; and                

         (ii)  There are no FDA enforcement actions or proceedings pending or, 
to such counsel's knowledge, threatened, against the Company.

     In addition such counsel shall state that, during the course of
preparation of the Registration Statement such counsel participated in
certain discussions with certain officers and employees of the Company as to
the FDA regulatory matters dealt with under the captions "Risk Factors --
Government Regulation" and "Business -- Government Regulation" in the
Prospectus.  While such counsel has not undertaken to determine independently,
and does not assume any responsibility for, the accuracy, completeness or
fairness of the statements under such captions in the Prospectus, such counsel
may state on the basis of these discussions and its activities  as special FDA
regulatory counsel to the Company in connection with such counsel's review of
the statements contained in such captioned sections that no facts have come to
such counsel's attention that cause such counsel to believe that the statements
in the Prospectus under the captions "Risk Factors -- Government Regulation"
and "Business -- Government Regulation," insofar as such statements relate to
FDA regulatory matters, at the time the Registration Statement became
effective, contained an untrue statement of material fact or omitted to state a
material fact required to be stated therein or necessary to make the statements
therein not misleading or that as of the date of such opinion, contains an
untrue statement of material fact or omits to state a material fact necessary
to make the statements therein, in light of the circumstances under which they
were made, not misleading.

     In rendering any such opinion, such counsel may (i) state that such
counsel expresses no opinion as to the laws of any jurisdiction other than the
Federal laws of the United States or as to any laws other than the FD&C Act and
the regulations promulgated thereunder  and (ii) may rely, as to matters of
fact, to the extent such counsel deems proper, on certificates of responsible
officers of the Company and public officials and, as to matters involving the
application of laws of any other jurisdiction than the United States.

     References to the Registration Statement and the Prospectus in this
paragraph (g) shall include any amendment or supplement thereto at the date of
such opinion.

     (h) The Representative shall have received an opinion, dated the Closing
Date and the Option Closing Date, as applicable, from Price, Heneveld, Cooper,
DeWitt & Litton, Grand Rapids, Michigan, special counsel for the Company, to
the following effect:

         (i)  The statements set forth in the Registration Statement and the
Prospectus pertaining to this offering, under the captions "Risk Factors --
Proprietary Rights; Risk of Infringement" and "Business -- Proprietary Rights
Information" (the "Intellectual Property Portion"), comprise accurate summaries
in all material respects of the provisions purported to be summarized under
such captions, and of any legal matters referred to therein;


                                     - 21 -


<PAGE>   22


         (ii)  As of (i.e., on) the date of such opinion, the Company is 
recorded in the records of the United States Patent and Trademark
Office as the sole owner or assignee of record of each of the issued patents
noted on an appendix to such opinion (the "Patents"), and each of the patent
applications noted on such appendix was so assigned and recorded at the time of
filing (the "Patent Applications").  To the actual knowledge of such counsel,
there have not been any subsequent recorded assignments and there is no
litigation pending or stated to be threatened (whether orally or in writing) by
any person relating to the ownership of the Patents or Patent Applications, no
material defects of form in the preparation or filing of the Patent
Applications and the applications which led to the Patents and, unless
otherwise noted on such appendix, none of the Patent Applications are on this
date under final rejection; and

         (iii)  To such counsel's actual knowledge, there is no litigation 
pending or stated to be threatened (whether orally or in writing)
against the Company at this time alleging that any of the Company's products
infringe any patent, copyright, trademark, trade secret or other intellectual
property rights of any third party and no litigation pending or stated to be
threatened (whether orally or in writing) against the Company at this time
relating to the Patents, the Patent Applications, or to any copyright,
trademark, trade secret or other intellectual property right owned by the
Company.

     In rendering any such opinion, such counsel may (i) state that such
counsel expresses no opinion as to the laws of any jurisdiction other than the
United States, or as to any laws other than the Federal intellectual property
laws of the United States and (ii) may rely, as to matters of fact on
certificates of responsible officers of the Company and public officials.

     References to the Registration Statement and the Prospectus in this
paragraph (h) shall include any amendment or supplement thereto at the date of
such opinion.

     (i) The Representative shall have received an opinion, dated the Closing
Date and the Option Closing Date, as applicable, from Piper & Marbury L.L.P.,
counsel to the Underwriters, which opinion shall be satisfactory in all
respects to the Representative.

     (j) Concurrently with the execution and delivery of this Agreement, or, if
the Company elects to rely on Rule 430A of the Rules and Regulations, on the
date of the Prospectus, the Accountants shall have furnished to the
Representative a letter, dated the date of its delivery (the "Original
Letter"), addressed to the Representative and in form and substance
satisfactory to the Representative, to the effect that:

         (i)  They are independent certified public accountants with respect 
to the Company within the meaning of the Act, the Rules and
Regulations, the Exchange Act and the rules and regulations thereunder;

         (ii)  In their opinion, the audited financial statements and schedules
examined by them and included in the Registration Statement, or incorporated
therein by reference, and in the Prospectus comply as to form in all material
respects with the applicable 

                                     - 22 -


<PAGE>   23

accounting requirements of the Act, the Rules and Regulations, the Exchange 
Act and the rules and regulations promulgated thereunder;

         (iii)  On the basis of a reading of the latest available interim 
unaudited financial statements of the Company, carrying out certain specified
procedures (which do not constitute an audit made in accordance with generally
accepted auditing standards) that would not necessarily reveal matters of
significance with respect to the comments set forth in this paragraph (iii), a
reading of the minute books of the shareholders, the board of directors and any
committees thereof of the Company and inquiries of certain officials of the
Company who have responsibility for financial and accounting matters, nothing
came to their attention that caused them to believe that at a specific date not
more than five business days prior to the date of such letter, there were any
changes in the shares of capital stock or long-term indebtedness of the
Company, in each  case compared with amounts shown on the November 30, 1997
balance sheet included in the Registration Statement and the Prospectus, or for
the period from December 1, 1997 to such specified date there were any
decreases, as compared with the corresponding period of the preceding fiscal
year, in net revenues, except in all instances for changes, decreases or
increases set forth in such letter or as set forth in or contemplated in the
Prospectus; and

         (iv)  They have carried out certain specified procedures, not 
constituting an audit, with respect to certain amounts, percentages and
financial information that are derived from the general accounting records of
the Company and are included in its Annual Report on Form 10-K for the fiscal
year ended November 30, 1997 and have compared such amounts, percentages and
financial information with such records of the Company and with information
derived from such records and have found them to be in agreement, excluding any
questions of legal interpretation.

     In the event that the letter referred to above set forth any such changes,
decreases or increases, it shall be a further condition to the obligations of
the Underwriters that (A) such letters shall, if requested by the
Representative, be accompanied by a written explanation of the Company as to
the significance thereof and (B) such changes, decreases or increases do not,
in the sole judgment of the Representative, make it impractical or inadvisable
to proceed with the purchase and delivery of the Shares as contemplated by the
Registration Statement, as amended as of the date hereof.

     At the Closing Date and, as to the Option Shares, if any, the Option
Closing Date, the Accountants shall have furnished to the Representative a
letter, dated the date of its delivery, which shall confirm, on the basis of a
review in accordance with the procedures set forth in the Original Letter, that
nothing has come to their attention during the period from the date of the
Original Letter referred to in the prior sentence to a date (specified in such
letter) not more than five days prior to the Closing Date or the Option Closing
Date, as the case may be, which would require any change in the Original Letter
if it were required to be dated and delivered at the Closing Date or the Option
Closing Date, as the case may be.


                                     - 23 -


<PAGE>   24

     (k) At the Closing Date and, as to the Option Shares, if any, the Option
Closing Date, there shall be furnished to the Representative an accurate
certificate, dated the date of its delivery, signed on behalf of the Company by
each of the Chief Executive Officer and the Chief Financial Officer of the
Company, in form and substance satisfactory to the Representative, to the
effect that:

         (i)  Each signer of such certificate has carefully examined the
Registration Statement and the Prospectus and (A) as of the date of such
certificate, (x) neither the Registration Statement, nor any amendment or
supplement thereto, if any, contains any untrue statement of a material fact or
omits to state a material fact required to be stated therein or necessary in
order to make the statements therein not misleading and (y) neither the
Prospectus, nor any amendment or supplement thereto, if any, contains any
untrue statement of a material fact or omits to state a material fact required
to be stated therein or necessary in order to make the statements therein, in
light of the circumstances under which they were made, not misleading,
and (B) since the Effective Date, no event has occurred as a result of which it
is necessary to amend or supplement the Prospectus in order to make the
statements therein not untrue or misleading in any material respect;

         (ii)  Each of the representations and warranties of the Company 
contained in this Agreement were, when originally made, and are, at the
time such certificate is delivered, true and correct in all material respects;
each of the covenants required herein to be performed by the Company on or
prior to the date of such certificate has been duly, timely and fully performed
in all material respects and each condition herein required to be complied with
by the Company on or prior to the delivery of such certificate has been duly,
timely and fully complied with in all material respects.

         (iii)  The Registration Statement has become effective and no stop 
order suspending the effectiveness of the Registration Statement or any
post-effective amendment thereto and no order directed at any document
incorporated by reference in the Registration Statement or any amendment
thereto or the Prospectus has been issued, and no proceedings for that purpose
have been instituted or, to the Company's knowledge, are threatened or
contemplated by the Commission.

     (l) The Shares shall have been qualified for sale in such states as the
Representative may reasonably designate and each such qualification shall be in
full force and effect and not subject to any stop order or other proceeding on
the Closing Date and the Option Closing Date, if any.

     (m) The Representative shall have received at or prior to the Closing Date
from Piper & Marbury L.L.P. a memorandum or summary, in form and substance
satisfactory to the Representative, with respect to the qualification for
offering and sale by the Underwriters of the Shares under the state securities
or Blue Sky laws of such jurisdictions as the Representative may reasonably
have designated to the Company.



                                     - 24 -


<PAGE>   25

     (n) The Company shall have filed a Nasdaq SmallCap Market Notification
Form for the listing of the Firm Shares and Option Shares and shall not have
received any notice of delisting of any Common Shares.

     (o) The Lockup Agreements shall be in full force and effect.

     (p) The Company shall have furnished to the Representative such
certificates, letters and other documents, in addition to those specifically
mentioned herein, as the Representative may have reasonably requested as to the
accuracy and completeness at the Closing Date and the Option Closing Date, if
any, of any statement in the Registration Statement or the Prospectus, as to
the accuracy at the Closing Date and the Option Closing Date, if any, of the
representations and warranties of the Company, as to the performance by the
Company of its obligations under this Agreement or as to the fulfillment of the
conditions concurrent and precedent to the obligations hereunder of the
Underwriters.

     All such opinions, certificates, letters and other documents will be in
compliance with the provisions hereof only if they are satisfactory in form and
substance to you.  The Company will furnish you with such conformed copies of
such opinions, certificates, letters and other documents as you shall
reasonably request.

     If any of the conditions hereinabove provided for in this Section 7 shall
not have been fulfilled when and as required by this Agreement to be fulfilled,
the obligations of the Underwriters hereunder may be terminated by the
Representative by notifying the Company of such termination in writing at or
prior to the Closing Date or the Option Closing Date, as the case may be.

  8. Indemnification and Contribution.

     (a) The Company agrees to indemnify and hold harmless each Underwriter,
the directors, officers, employees and agents of each Underwriter and each
person, if any, who controls such Underwriter within the meaning of Section 15
of the Act or Section 20 of the Exchange Act, from and against any and all
losses, claims, damages or liabilities, joint or several (and actions in
respect thereof), to which they, or any of them, may become subject under the
Act or other Federal or state law or regulation, at common law or otherwise,
insofar as such losses, claims, damages or liabilities (or actions in respect
thereof) arise out of or are based upon (i) any misrepresentation or breach of
warranty made by the Company in Section 3 of this Agreement, (ii) any untrue
statement or alleged untrue statement of any material fact contained in (A) any
Preliminary Prospectus, the Registration Statement or the Prospectus or any
amendment or supplement to the Registration Statement or the Prospectus or (B)
any application or other document, or any amendment or supplement thereto,
executed by the Company or based upon written information furnished by or on
behalf of the Company filed in any jurisdiction in order to qualify the Shares
under the securities or Blue Sky laws thereof or filed with the Commission, the
NASD or any securities association or securities exchange (each, an
"Application"), or (iii) the omission or alleged omission to state in any
Preliminary Prospectus, the Registration 

                                     - 25 -


<PAGE>   26

Statement or the Prospectus or any amendment or supplement to the
Registration Statement or the Prospectus or any Application a material fact
required to be stated therein or necessary to make the statements therein not
misleading, and will reimburse, as incurred, each Underwriter and each such
other person for any legal or other expenses reasonably incurred by such
Underwriter or such other person in connection with investigating, defending or
appearing as a third-party witness in connection with any such loss, claim,
damage, liability or action; provided, however, that the Company will not be
liable in any such case to the extent that any such loss, claim, damage or
liability arises out of an untrue statement or omission or alleged untrue
statement or omission in any of such documents made or omitted to be made in
reliance upon and in conformity with information furnished by such Underwriter
in writing to the Company by the Representative on behalf of any Underwriter
expressly for inclusion therein; provided, further, that such indemnity with
respect to any Preliminary Prospectus shall not inure to the benefit of any
Underwriter (or any such other person) from whom the person asserting any such
loss, claim, damage, liability or action purchased Shares which are the subject
thereof to the extent that any such loss, claim, damage or liability (i)
results from the fact that such Underwriter failed to send or give a copy of
the Prospectus (as amended or supplemented) to such person at or prior to the
confirmation of the sale of such Shares to such person in any case where such
delivery is required by the Act and (ii) arises out of or is based upon an
untrue statement or omission of a material fact contained in such Preliminary
Prospectus that was corrected in the Prospectus (or any amendment or supplement
thereto), unless such failure to deliver the Prospectus (as amended or
supplemented) was the result of noncompliance by the Company with Section 5(f)
hereof.  This indemnity agreement will be in addition to any liability that the
Company might otherwise have.  The Company will not, without the prior written
consent of each Underwriter, settle or compromise or consent to the entry of
any judgment in any pending or threatened claim, action, suit or proceeding in
respect of which indemnification may be sought hereunder (whether or not such
Underwriter or any person who controls such Underwriter within the meaning of
Section 15 of the Act or Section 20 of the Exchange Act is a party to each
claim, action, suit or proceeding), unless such settlement, compromise or
consent includes an unconditional release of each Underwriter and each such
other person from all liability arising out of such claim, action, suit or
proceeding.

     (b) Each Underwriter, severally and not jointly, will indemnify and hold
harmless the Company, the directors, officers, employees and agents of the
Company and each person, if any, who controls the Company within the meaning of
Section 15 of the Act or Section 20 of the Exchange Act, against any and all
losses, claims, damages or liabilities, joint or several (and actions in
respect thereof), to which they, or any of them, may become subject under the
Act or other Federal or state law or regulation, at common law or otherwise,
insofar as such losses, claims, damages or liabilities (or actions in respect
thereof) arise out of or are based upon (i) any untrue statement or alleged
untrue statement of a material fact contained in any Preliminary Prospectus,
the Registration Statement or the Prospectus or any amendment or supplement to
the Registration Statement or the Prospectus or any Application, or (ii) the
omission or the alleged omission to state in the Registration Statement, any
Preliminary Prospectus or the Prospectus or any amendment or supplement to the
Registration Statement or the Prospectus, or any 

                                     - 26 -


<PAGE>   27

Application, a material fact required to be stated therein or necessary
to make the statements therein not misleading, in each case to the extent, but
only to the extent, that such untrue statement or alleged untrue statement or
omission or alleged omission was made or omitted to be made in reliance upon
and in conformity with written information furnished to the Company by such
Underwriter through the Representative expressly for use therein; and, subject
to the limitation set forth immediately preceding this clause, will reimburse,
as incurred, the Company and each such other person for any legal or other
expenses reasonably incurred by the Company and each such other person in
connection with investigating, defending or appearing as a third-party witness
in connection with any such loss, claim, damage, liability or any action in
respect thereof. The Company acknowledges that, for all purposes under this
Agreement, the statements set forth under the heading "Underwriting" and the
information set forth in the last paragraph on the front cover page (insofar as
such information relates to the Underwriters) and the last two paragraphs on
the inside front cover of any Preliminary Prospectus and the Prospectus
constitute the only information furnished in writing to the Company by the
Representative on behalf of the Underwriters expressly for inclusion in the
Registration Statement, any Preliminary Prospectus or the Prospectus.  This
indemnity agreement will be in addition to any liability that each  Underwriter
might otherwise have.  No Underwriter will, without the prior written consent
of the Company, settle or compromise or consent to the entry of any judgment in
any pending or threatened claim, action, suit or proceeding in respect of which
indemnification may be sought hereunder (whether or not the Company or any
person who controls the Company within the meaning of Section 15 of the Act or
Section 20 of the Exchange Act is a party to each claim, action, suit or
proceeding), unless such settlement, compromise or consent includes an
unconditional release of the Company and each such other person from all
liability arising out of such claim, action, suit or proceeding.

     (c) Promptly after receipt by an indemnified party under this Section 8 of
notice of the commencement of any action, such indemnified party will, if a
claim in respect thereof is to be made against an indemnifying party or parties
under this Section 8, notify such indemnifying party or parties of the
commencement thereof; but the omission so to notify the indemnifying party or
parties will not relieve it or them from any liability which it or they may
have to any indemnified party under the foregoing provisions of this Section 8
or otherwise unless, and only to the extent that, such omission results in the
forfeiture of substantive rights or defenses by the indemnifying party.  If any
such action is brought against an indemnified party, the indemnifying party or
parties against which a claim is made will be entitled to participate therein
and, to the extent that it or they may wish, to assume the defense thereof with
counsel reasonably satisfactory to such indemnified party; provided, however,
that if the defendants in any such action include both the indemnified party
and the indemnifying party or parties and the indemnified party shall have
reasonably concluded that there may be one or more legal defenses available to
it and/or other indemnified parties which are different from or additional to
those available to the indemnifying party or parties, the indemnifying party or
parties shall not have the right to direct the defense of such action on behalf
of such indemnified party or parties and such indemnified party or parties
shall have the right to select separate counsel to defend such action on behalf
of such indemnified party or parties.  After notice from the indemnifying party
or 


                                     - 27 -


<PAGE>   28

parties to such indemnified party of its or their election so to assume the
defense thereof and approval by such indemnified party of counsel appointed to
defend such action, the indemnifying party or parties will not be liable to
such indemnified party under this Section 8 for any legal or other expenses
other than reasonable costs of investigation subsequently incurred by such
indemnified party in connection with the defense thereof, unless (i) the
indemnified party shall have employed separate counsel in accordance with the
proviso to the next preceding sentence (it being understood, however, that in
connection with such action the indemnifying party or parties shall not be
liable for the expenses of more than one separate counsel (in addition to local
counsel) in any one action or separate but substantially similar actions in the
same jurisdiction arising out of the same general allegations or circumstances,
designated by the Representative in the case of paragraph (a) of this Section
8, representing the indemnified parties under such paragraph (a) who are
parties to such action or actions), or (ii) the indemnifying party has
authorized in writing the employment of counsel for the indemnified party at
the expense of the indemnifying party or parties.  After such notice from the
indemnifying party or parties to such indemnified party, the indemnifying party
or parties will not be liable for the costs and expenses of any settlement of
such action effected by such indemnified party without the consent of the
indemnifying party or parties.                                                

     (d) If the indemnification provided for in the foregoing paragraphs of
this Section 8 is unavailable or insufficient to hold harmless an indemnified
party under paragraph (a) or (b) above in respect of any losses, claims,
damages or liabilities (or actions in respect thereof) referred to therein,
then each indemnifying party shall contribute to the amount paid or payable by
such indemnified party as a result of such losses, claims, damages or
liabilities (or actions in respect thereof) (i) in such proportion as is
appropriate to reflect the relative benefits received by the indemnifying party
or parties, on the one hand, and the indemnified party, on the other, from the
offering of the Shares or (ii) if, but only if, the allocation provided by the
foregoing clause (i) is not permitted by applicable law, in such proportion as
is appropriate to reflect not only the relative benefits referred to in clause
(i) above but also the relative fault of the indemnifying party or parties on
the one hand, and the indemnified party, on the other, in connection with the
statements or omissions or alleged statements or omissions that resulted in
such losses, claims, damages or liabilities (or actions in respect thereof), as
well as any other relevant equitable considerations.  The relative benefits
received by the Company, on the one hand, and the Underwriters, on the other,
shall be deemed to be in the same proportion as the total proceeds from the
offering of the Shares (before deducting expenses) received by the Company bear
to the total underwriting discounts and commissions received by the
Underwriters, in each case as set forth in the table on the cover page of the
Prospectus.  Relative fault shall be determined by reference to whether the
untrue or alleged untrue statement of a material fact or the omission or
alleged omission to state a material fact relates to information supplied by
the Company or the Representative on behalf of the Underwriters, the parties'
relative intent, knowledge, access to information and opportunity to correct or
prevent such statement or omission.  The Company and the Underwriters agree
that it would not be just and equitable if contributions pursuant to this
Section 8(d) were to be determined by pro rata allocation (even if the
Underwriters were treated as one entity for such purpose) or by any other
method of allocation which does not take into 

                                     - 28 -


<PAGE>   29

account the equitable considerations referred to herein.  The amount
paid or payable by an indemnified party as a result of the losses, claims,
damages, liabilities (or actions in respect thereof) referred to above in this
Section 8(d) shall be deemed to include any legal or other expenses reasonably
incurred by such indemnified party in connection with investigating or
defending any such action or claim.  Notwithstanding the provisions of this
Section 8(d), no Underwriter shall be required to contribute any amount in
excess of the amount by which the underwriting discounts and commissions
applicable to the Shares purchased by such Underwriter exceeds the amount of
any damages that such Underwriter has otherwise been required to pay in respect
of the same or any substantially similar claim.  Notwithstanding the provisions
of this Section 8(d), the Company shall not be required to contribute any
amount in excess of the amount by which the total proceeds received by it from
the sale of the Shares under this Agreement, before deducting expenses, exceeds
the aggregate amount of any damages that the Company has otherwise been
required to pay in respect of the same or any substantially similar claim.  No
person found guilty of fraudulent misrepresentation (within the meaning of
Section 11(f) of the Act) will be entitled to contribution from any person who
was not guilty of such fraudulent misrepresentation.  The Underwriters'
obligations to contribute as provided in this Section 8(d) are several in
proportion to their respective underwriting obligations and not joint.  For
purposes of this Section 8(d), each person, if any, who controls an Underwriter
within the meaning of Section 15 of the Act or Section 20 of the Exchange Act
will have the same rights to contribution as such Underwriter, and each
director of the Company, each officer of the Company who signed the
Registration Statement and each person, if any, who controls the Company within
the meaning of Section 15 of the Act or Section 20 of the Exchange Act, will
have the same rights to contribution as the Company, subject in each case to
the provisions of this Section 8(d).  Any party entitled to contribution will,
promptly after receipt of notice of commencement of any action, suit or
proceeding against such party in respect of which a claim for contribution may
be made under this Section 8(d), notify any such party or parties from whom
contribution may be sought, but the omission so to notify will not relieve the
party or parties from whom contribution may be sought from any other
obligation(s) it or they may have hereunder or otherwise than under this
Section 8(d), or to the extent that such party or parties were not adversely
affected by such omission.  The contribution agreement set forth above shall be
in addition to any liabilities which any indemnifying party may otherwise have. 
No party will be liable for contribution with respect to any action or claim
settled without its written consent (which consent will not be unreasonably
withheld).

     9. Termination.  The obligations of the several Underwriters under this
Agreement may be terminated at any time prior to the Closing Date (or, with
respect to the Option Shares, if any, on or prior to the Option Closing Date),
by notice to the Company from the Representative, without liability on the part
of any Underwriter to the Company, if, prior to delivery and payment for the
Firm Shares (or the Option Shares, if any, as the case may be), (i) the Company
shall have failed, refused or been unable, at or prior to such Closing Date, to
perform all obligations on its part to be performed under this Agreement, (ii)
any of the representations or warranties of the Company are not accurate in any
respect, (iii) since the respective dates as of which information is given in
the Registration Statement and the Prospectus, there shall have occurred any
material 

                                     - 29 -


<PAGE>   30

adverse change in the general affairs, business, business prospects,
properties, management, condition (financial or otherwise), net worth or
results of operation, whether or not arising in the ordinary course of
business, (iv) trading in the Common Shares or securities generally shall have
been suspended by the Commission or by The Nasdaq Stock Market, (v) minimum or
maximum prices shall have been established for the Common Shares or securities
generally on either The Nasdaq Stock Market or the New York Stock Exchange, or
additional material governmental restrictions, not in force on the date of this
Agreement, shall have been imposed upon trading in securities generally by any
such market or exchange or by order of the Commission or any court or other
governmental authority, (vi) a general banking moratorium shall have been
declared by the United States or New York State authorities, (vii) there shall
have been enacted, published, decreed or otherwise promulgated any statute,
regulation, rule or order of any court or other Governmental Body which in the
opinion of the Representative materially and adversely affects or may
materially and adversely affect the business or operations of the Company or
(viii) any material adverse change in the financial or securities markets in
the United States or any outbreak or material escalation of hostilities or
declaration by the United States of a national emergency or war or other
calamity or crisis shall have occurred, the effect of any of which is such as
to make it, in the sole judgment of the Representative, impracticable or
inadvisable to market the Shares on the terms and in the manner contemplated by
the Prospectus.  This Agreement may also be terminated as provided in Sections
7 and 10 of this Agreement.  Any termination pursuant to this Section 9 shall 
be without liability of any party to any other party except as provided in 
Sections 6 and 8 hereof.

  10. Default of Underwriters.  If one or more Underwriters default in their
obligations to purchase Firm Shares or Option Shares hereunder and the
aggregate number of such Shares that such defaulting Underwriter or
Underwriters agreed but failed to purchase is ten percent (10%) or less of the
aggregate number of Firm Shares or Option Shares, as the case may be, to be
purchased by all of the Underwriters at such time hereunder, the other
Underwriters may make arrangements satisfactory to the Representative for the
purchase of such Shares by other persons (who may include one or more of the
non-defaulting Underwriters, including the Representative), but if no such
arrangements are made by the Closing Date or the related Option Closing Date,
as the case may be, the other Underwriters shall be obligated severally in
proportion to their respective commitments hereunder to purchase the Firm
Shares or Option Shares that such defaulting Underwriter or Underwriters agreed
but failed to purchase.  If one or more Underwriters so default with respect to
an aggregate number of Shares that is more than ten percent (10%) of the
aggregate number of Firm Shares or Option Shares, as the case may be, to be
purchased by all of the Underwriters at such time hereunder, and if
arrangements satisfactory to the Representative are not made within 48 hours
after such default for the purchase by other persons (who may include one or
more of the non-defaulting Underwriters, including the Representative) of the
Shares with respect to which such default occurs, this Agreement will terminate
without liability on the part of any non-defaulting Underwriter or the Company
other than as provided in Section 11 hereof.  In the event of any default by
one or more Underwriters as described in this Section 10, the Representative
shall have the right to postpone the Closing Date or the Option Closing Date,
as the case may be, established as provided in Section 2 hereof 

                                     - 30 -


<PAGE>   31

for not more than seven (7) business days in order that any necessary
changes may be made in the arrangements or documents for the purchase and
delivery of the Firm Shares or Option Shares, as the case may be.  As used in
this Agreement, the term "Underwriter" includes any person substituted for an
Underwriter under this Section 10.  Nothing herein shall relieve any defaulting
Underwriter from liability for its default.

  11. Survival.  The respective representations, warranties, agreements,
covenants, indemnities and other statements of the Company and the several
Underwriters set forth in this Agreement or made by or on behalf of them,
respectively, pursuant to this Agreement shall remain in full force and effect,
regardless of (i) any investigation made by or on behalf of the Company, any of
its officers or directors, any Underwriter or any controlling person referred
to in Section 8 hereof and (ii) delivery of and payment for the Shares.  The
respective agreements, covenants, indemnities and other statements set forth in
Sections 6 and 8 hereof shall remain in full force and effect, regardless of
any termination or cancellation of this Agreement.

  12. Notices.  Notice given pursuant to any of the provisions of this
Agreement shall be in writing and, unless otherwise specified, shall be
mailed or delivered (a) if to the Company, at the office of the Company, 1653
East Maple Road, Troy, Michigan 48083-4208, Attention: Chief Executive Officer,
Telephone: (810) 689-3050 and Facsimile: (810) 689-4294, with a copy to
Honigman Miller Schwartz and Cohn, 2290 First National Building, Detroit,
Michigan 48226, Attention: Robert J. Krueger, Esq., Telephone: (313) 256-7675 
and Facsimile: (313) 962-0176 or (b) if to the Underwriters, to the
Representative at the offices of Brean Murray & Co., Inc., 570 Lexington
Avenue, New York, New York 10022-6822 Attention: Mr. A. Brean Murray,
Telephone: (212) 702-6500 and Facsimile: (212) 702-6649, with a copy to Piper &
Marbury L.L.P., 1251 Avenue of the Americas, New York, New York 10020-1104,
Attention: Michael Hirschberg, Esq., Telephone: (212) 835-6270 and Facsimile:
(212) 835-6001.  Any such notice shall be effective only upon receipt.  Any
notice under Section 8 or 9 hereof may be made by telephone or facsimile but if
so made shall be subsequently confirmed in writing.

  13. Successors.  This Agreement shall inure to the benefit of and shall be
binding upon the several Underwriters, the Company and their respective
successors and legal representatives, and nothing expressed or mentioned in
this Agreement is intended or shall be construed to give any other person any
legal or equitable right, remedy or claim under or in respect of this
Agreement, or any provisions herein contained, this Agreement and all
conditions and provisions hereof being intended to be and being for the sole
and exclusive benefit of such persons and for the benefit of no other person
except that (i) the indemnities of the Company contained in Section 8 of this
Agreement shall also be for the benefit of any person or persons who control
any Underwriter within the meaning of Section 15 of the Act or Section 20 of
the Exchange Act and (ii) the indemnities of the Underwriters contained in
Section 8 of this Agreement shall also be for the benefit of the directors of
the Company, the officers of the Company who have signed the Registration
Statement and any person or persons who control the Company within the meaning
of Section 15 of the Act or Section 20 of the Exchange Act.  No purchaser of
Shares from any Underwriter shall be deemed a successor because of such
purchase.  

                                     - 31 -


<PAGE>   32

This Agreement shall not be assignable by any party hereto without the
prior written consent of the other parties.

  14. APPLICABLE LAW.  THE VALIDITY AND INTERPRETATION OF THIS AGREEMENT,
AND THE TERMS AND CONDITIONS SET FORTH HEREIN, SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, WITHOUT GIVING
EFFECT TO ANY PROVISIONS RELATING TO CONFLICTS OF LAWS.

  15. Submission to Jurisdiction.  The Company hereby submits to the
nonexclusive jurisdiction of the United States District Court for the Southern
District of New York and of the Supreme Court of the State of New York sitting
in New York County (including its Appellate Division), and of any other
appellate court in the State of New York, for the purposes of all legal
proceedings arising out of or relating to this Agreement or the transactions
contemplated hereby.  The Company irrevocably waives, to the fullest extent
permitted by applicable law, any objection that it may now or hereafter have to
the laying of venue of any such proceeding brought in such a court and any
claim that any such proceeding brought in such a court has been brought in an
inconvenient forum.

  16. Counterparts.  This Agreement may be executed in two or more
counterparts, each of which shall be deemed an original, but all of which
together shall constitute one and the same instrument.

  Please confirm that the foregoing correctly sets forth the agreement among
the Company and the several Underwriters.

                                        Very truly yours,

                                        SOMANETICS CORPORATION

                                        By:_______________________________
                                        Name:
                                        Title:


                                     - 32 -


<PAGE>   33



Confirmed as of the date first
above mentioned:

BREAN MURRAY & CO., INC.


By:_________________________________
Name:
Title:

Acting on its behalf and
as the Representative of
the other several Underwriters
named in Schedule I hereof.



                                     - 33 -


<PAGE>   34





                                   SCHEDULE I

                                  UNDERWRITERS

                                                                       Aggregate
                                                                       Number of
                                                                       Shares to
                                                                              be
                                                                       Purchased
                                                                       ---------

          Brean Murray & Co., Inc. . . . . . . . . . . . . . . . . 




                   Total . . . . . . . . . . . . . . . . . . . . .     2,000,000
                                                                       =========



                                     - 34 -


<PAGE>   1
                                                                     EXHIBIT 5.1


                [HONIGMAN MILLER SCHWARTZ AND COHN LETTERHEAD]
   

                                March 12, 1998
    


Somanetics Corporation
1653 East Maple Road
Troy, Michigan 48083-4208

Ladies and Gentlemen:

        We have represented Somanetics Corporation, a Michigan corporation (the
"Company"), in connection with the preparation and filing with the Securities
and Exchange Commission (the "Commission") of a Registration Statement on Form
S-1 (the "Registration Statement"), for registration under the Securities Act
of 1933, as amended (the "Securities Act"), of up to 2,300,000 of the Company's
Common Shares, par value $0.01 a share (the "Common Shares").

        Based upon our examination of such documents and other matters as we
deem relevant, it is our opinion that when the Registration Statement has
become effective and the Company has approved the amount of Common Shares to be
sold and the sales price of such Common Shares, the Common Shares covered by
the Registration Statement will have been duly authorized and, when issued and
sold by the Company as described in the Registration Statement and in the manner
set forth in the Underwriting Agreement referred to in the Registration
Statement, in the amount approved by the Company, against payment therefor,
will be validly issued, fully paid and nonassessable.


        We hereby consent to the filing of this opinion as an exhibit to the
Registration Statement and to the use of our name under the  caption "Legal
Matters" in the Prospectus included in the Registration Statement. In giving
such consents, we do not admit hereby that we come within the category of
persons whose consent is required under Section 7 of the Securities Act or the
Rules and Regulations of the Commission under the Securities Act.



                                          Very truly yours,


                                          /s/ HONIGMAN MILLER SCHWARTZ AND COHN
                                              HONIGMAN MILLER SCHWARTZ AND COHN


RJK

<PAGE>   1

                                                                    EXHIBIT 23.1

             INDEPENDENT AUDITORS' CONSENT AND REPORT ON SCHEDULE


   
We consent to the use in this Amendment No. 1 to Registration Statement
No. 333-47225 relating to 2,300,000 Common Shares of Somanetics Corporation on
Form S-1 of our report dated January 9, 1998 (March 11, 1998 as to paragraph 1
of Note 11) (which includes an explanatory paragraph relating to an uncertainty
concerning Somanetics Corporation's ability to continue as a going concern),
appearing in the Prospectus, which is a part of this Registration Statement,
and to the references to us under the headings "Selected Financial Data" and
"Experts" in such Prospectus.
    

Our audits of the financial statements referred to in our aforementioned report
also included the financial statement schedule of Somanetics Corporation listed
in Item 16(b).  This financial statement schedule is the responsibility of
Somanetics Corporation's management.  Our responsibility is to express an
opinion based on our audits.  In our opinion, such financial statement
schedule, when considered in relation to the basic financial statements taken
as a whole, presents fairly in all material respects the information set forth
therein.



   
/s/ DELOITTE & TOUCHE LLP
DELOITTE & TOUCHE LLP
Detroit, Michigan
March 12, 1998
    



© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission