Document:

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                                                                   Exhibit 10.29

     THE SECURITIES REPRESENTED BY THIS WARRANT HAVE BEEN ACQUIRED FOR
     INVESTMENT AND HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933.
     SUCH SECURITIES MAY NOT BE SOLD OR TRANSFERRED IN THE ABSENCE OF SUCH
     REGISTRATION OR AN EXEMPTION THEREFROM UNDER SAID ACT. COPIES OF THE
     AGREEMENT COVERING THE PURCHASE OF THIS WARRANT AND RESTRICTING ITS
     TRANSFER MAY BE OBTAINED AT NO COST BY WRITTEN REQUEST MADE BY THE HOLDER
     OF RECORD OF THIS WARRANT TO THE SECRETARY OF THE COMPANY.

Warrant No. 2002-3                                              October 17, 2002

                          HUDSON RESPIRATORY CARE INC.

                             STOCK PURCHASE WARRANT

     This certifies that Sten Gibeck, or assigns (the "Holder"), for value
received, is entitled to purchase from Hudson Respiratory Care Inc., a
California corporation, located at 27111 Diaz Road, P.O. Box 9020, Temecula,
California 92589-9020 (the "Company"), 100,000 fully paid and nonassessable
shares (subject to appropriate adjustment for stock splits, stock dividends,
combinations, recapitalizations and the like) of common stock of the Company,
$.01 par value per share ("Common Stock") for a purchase price of $1.00 per
share.

     The shares of the Company's Common Stock for which this Warrant is
exercisable are referred to herein as the "Warrant Shares" and the per share
purchase price of such Warrant Shares is referred to herein as the "Purchase
Price." Subject to earlier expiration as provided in Section 9 herein, this
Warrant may be exercised at any time or from time to time up to and including
5:00 p.m. (Pacific time) on May 15, 2009 (the "Expiration Date"), upon surrender
to the Company at its principal office (or at such other location as the Company
may advise Holder in writing) of this Warrant properly endorsed with the Form of
Subscription attached hereto duly filled in and signed and upon payment in cash
or by check of the aggregate Purchase Price for the number of Warrant Shares for
which this Warrant is being exercised determined in accordance with the
provisions hereof. The Purchase Price and the Warrant Shares are subject to
adjustment as provided in Section 4 of this Warrant.

     This Warrant is subject to the following terms and conditions:

     1.   Exercise; Issuance of Certificates; Payment for Shares. This Warrant
is exercisable at the option of the Holder of record hereof, at any time or from
time to time, up to the Expiration Date for all and any part of the Warrant
Shares (but not for a fraction of a share). At the option of the Holder, the
Purchase Price for the Warrant Shares being purchased upon any exercise may be
paid by (i) delivery of cash or a check, (ii) "net exercise" as provided in the
following Section 2, or (iii) reduction (on a dollar for dollar basis) in the
principal balance of any indebtedness of the Company owned by the Holder. At the
time of any exercise of this Warrant, at the Holder's option, the Company shall
pay all accrued unpaid interest owing under the

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indebtedness being reduced to Holder in cash or the Holder may apply such
accrued unpaid interest to the Purchase Price of the Warrant. The Holder shall
surrender the instrument evidencing the indebtedness being charged to the
Company which shall issue a new instrument reflecting the remaining principal
balance thereof.

     The Company agrees that the Warrant Shares purchased under this Warrant
shall be and are deemed to be issued to the Holder hereof as the record owner of
such shares as of the close of business on the date on which this Warrant shall
have been surrendered and payment made for such shares. Certificates for the
Warrant Shares so purchased, together with any other securities or property to
which the Holder hereof is entitled upon such exercise, shall be delivered to
the Holder hereof by the Company at the Company's expense within a reasonable
time after the rights represented by this Warrant have been so exercised. Each
stock certificate so delivered shall be in such denominations as may be
requested by the Holder hereof and shall be registered in the name of such
Holder or such other name as shall be designated by such Holder. In case of a
purchase of less than all the Warrant Shares, the Company shall cancel this
Warrant and execute and deliver a new Warrant or Warrants of like tenor for the
balance of the Warrant Shares purchasable under the Warrant surrendered upon
such purchase to the Holder hereof within a reasonable time, not exceeding
fifteen (15) days after the date of such surrender.

     2.   Net Exercise.

          2.1  Net Exercise. In addition to, and without limiting, the other
rights of the Holder hereunder, the Holder shall have the right (the "Net
Exercise Right") to exercise this Warrant or any part hereof into Warrant Shares
at any time and from time to time during the term hereof. Upon exercise of the
Net Exercise Right, the Company shall deliver to the Holder, without payment by
the Holder of any Purchase Price or any cash or other consideration, that number
of Warrant Shares computed using the following formula:

          X=Y(A-B)
            ------
              A

Where: X= The number of Warrant Shares to be issued to the Holder

          Y=   The number of Warrant Shares purchasable pursuant to this Warrant

          A=   The Fair Market Value of one Warrant Share as of the Exercise
               Date

          B=   The Purchase Price

          2.2  Method of Exercise. The Net Exercise Right may be exercised by
the Holder by the surrender of this Warrant to the Company at its principal
office at the address indicated on the first paragraph of this Warrant, together
with a written notice specifying that the Holder intends to exercise the Net
Exercise Right and indicating the number of Warrant Shares to be acquired upon
exercise of the Net Exercise Right. Such exercise shall be effective upon the
Company's receipt of this Warrant, together with the exercise notice, or on such
later date as is specified in the exercise notice (the "Exercise Date") and, at
the Holder's election, may be made

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contingent upon the closing of the Company's initial public offering of any
securities pursuant to a registration statement (an "IPO") under the Securities
Act of 1933, as amended (the "Securities Act") or upon consummation of any
merger in which shareholders of the Company prior to such merger hold less than
50% of the voting power of the capital stock of the surviving corporation after
such merger, or the sale of all or substantially all of the Company's assets, or
a transaction, whether effected in a single transaction or a series of related
transactions, in which 50% or more of the voting power of the capital stock of
the Company is transferred (a "Change of Control"). Certificates for the Warrant
Shares so acquired shall be delivered to the Holder within a reasonable time,
not exceeding fifteen (15) days after the Exercise Date. If applicable, the
Company shall, upon surrender of this Warrant for cancellation, deliver a new
Warrant evidencing the rights of the Holder to purchase the balance of the
Warrant Shares which Holder is entitled to purchase hereunder.

          2.3  Fair Market Value. "Fair Market Value" of a share of Warrant
Shares or Common Stock (issued upon net exercise thereof) as of a particular
date means: (a) if traded on an exchange or quoted on The NASDAQ National
Market, then the average closing prices of the Common Stock for the ten trading
days ending with the second prior trading day, (b) if exercise is effective as
of the closing of the Company's initial public offering of any securities
pursuant to a registration statement under the Securities Act, the "price to
public" specified for such shares in the final prospectus for such public
offering, (c) if listed by the National Daily Quotation Service "Pink Sheets,"
then the average of the closing bid and ask prices of the Common Stock for the
ten trading days ending with the second prior trading day, and (d) otherwise,
the price as determined in good faith by the Board of Directors of the Company.

     3.   Shares to be Fully Paid; Reservation of Shares. The Company covenants
and agrees that all Warrant Shares (and shares of its Common Stock reserved for
issuance upon net exercise of such Warrant Shares) which may be issued upon the
exercise of the rights represented by this Warrant will, upon issuance, be duly
authorized, validly issued, fully paid and nonassessable and free from all
preemptive rights of any shareholder and free of all taxes, liens and charges
with respect to the issue thereof. The Company further covenants and agrees that
during the period within which the rights represented by this Warrant may be
exercised, the Company shall take all steps necessary to cause a sufficient
number of shares of authorized but unissued capital stock (and shares of its
Common Stock for issuance on net exercise of such capital stock, if any) to be
authorized when and as required to provide for the exercise of the rights
represented by this Warrant. The Company will take all such action as may be
necessary to assure that such shares of capital stock (and shares of Common
Stock for issuance on net exercise of such capital stock, if any) may be issued
as provided herein without violation of any applicable law or regulation, or of
any requirements of any domestic securities exchange upon which the stock may be
listed. The Company will not take any action which would result in any
adjustment of the Purchase Price (as described in Section 4 hereof) if the total
number of shares of capital stock issuable after such action upon exercise of
all outstanding warrants, together with all shares of capital stock of the same
class and series as such capital stock then outstanding and all shares of
capital stock of the same class and series as such capital stock then issuable
upon exercise of all options and upon the conversion of all convertible
securities then outstanding,

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would exceed the total number of shares of capital stock of the same class and
series as the Warrant Shares then authorized by the Company's Articles of
Incorporation.

     4.   Adjustment of Purchase Price and Number of Shares. The Purchase Price
and the number of shares purchasable upon the exercise of this Warrant shall be
subject to adjustment from time to time upon the occurrence of certain events
described in this Section 4. Upon each adjustment of the Purchase Price, the
Holder of this Warrant shall thereafter be entitled to purchase, at the Purchase
Price resulting from such adjustment, the number of shares obtained by
multiplying the Purchase Price in effect immediately prior to such adjustment by
the number of shares purchasable pursuant hereto immediately prior to such
adjustment, and dividing the product thereof by the Purchase Price resulting
from such adjustment.

          4.1  Subdivision or Combination of Stock. In the event the outstanding
shares of Common Stock shall, after the date of this Warrant, be subdivided
(split) or combined (reverse split), by reclassification or otherwise, the
Warrant Shares issuable upon exercise of this Warrant and the Purchase Price
shall, concurrently with the effectiveness of any such subdivision or
combination, be proportionately adjusted.

          4.2  Dividends, Reclassification. If at any time or from time to time
any holders of securities of the same class and series as the Warrant Shares
shall have received or become entitled to receive, without payment thereof,

               (A)  any shares of the Company's preferred stock, Common Stock or
any shares of stock or other securities which are at any time directly or
indirectly convertible into or exchangeable for Common Stock, or any rights or
options to subscribe for, purchase or otherwise acquire any of the foregoing by
way of dividend or other distribution;

               (B)  any cash paid or payable as a dividend; or

               (C)  any shares of the Company's preferred stock, Common Stock or
other or additional stock or other securities or property (including cash) by
way of spinoff, split-up, reclassification, combination of shares or similar
corporate rearrangement (other than shares of the same class and series as the
Warrant Shares issued as a stock split, adjustments in respect of which shall be
covered by the terms of Section 4.1 above),

then and in each such case, the Holder hereof shall, upon the exercise of this
Warrant, be entitled to receive, in addition to the number of shares of such
capital stock receivable thereupon, and without payment of any additional
consideration therefor, the amount of stock and other securities and property
(including cash in the cases referred to in clauses (B) and (C) above) which
such Holder would hold on the date of such exercise had he or it been the Holder
of record of such capital stock as of the date on which holders of such capital
stock received or became entitled to receive such shares and/or all other
additional stock and other securities and property.

          4.3  Adjustment for Capital Reorganization, Merger or Consolidation.
In case of any capital reorganization of the capital stock of the Company (other
than a combination, reclassification, exchange or subdivision of shares
otherwise provided for herein), or any merger

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or consolidation of the Company with or into another corporation, or the sale of
all or substantially all the assets of the Company then, as a part of such
reorganization, merger or consolidation, lawful provision shall be made so that
the Holder of this Warrant shall thereafter be entitled to receive upon exercise
of this Warrant, during the period specified herein and upon payment of the
Purchase Price then in effect, the number of shares of stock or other securities
or property of the Company resulting from such reorganization that a holder of
the shares deliverable upon exercise of this Warrant would have been entitled to
receive in such reorganization if this Warrant had been exercised immediately
before such reorganization, subject to further adjustment as provided in this
Section 4. The foregoing provisions of this Section 4.3 shall similarly apply to
successive reorganizations and to the stock or securities of any other
corporation that are at the time receivable upon the exercise of this Warrant.
If the per-share consideration payable to the Holder hereof for shares in
connection with any such transaction is in a form other than cash or marketable
securities, then the value of such consideration shall be determined in good
faith by the Board. In all events, appropriate adjustment (as determined in good
faith by the Board) shall be made in the application of the provisions of this
Warrant with respect to the rights and interests of the Holder after the
transaction, to the end that the provisions of this Warrant shall be applicable
after that event, as near as reasonably may be, in relation to any shares or
other property deliverable after that event upon exercise of this Warrant.

          4.4  Other Notices. If at any time:

               (1)  the Company shall declare any cash dividend upon its shares
of the same class and series as the Warrant Shares;

               (2)  the Company shall declare any dividend upon its shares of
the same class and series as the Warrant Shares payable in stock or make any
special dividend or other distribution to the holders of its shares of the same
class and series as the Warrant Shares;

               (3)  there shall be any capital reorganization or
reclassification of the capital stock of the Company, or any Change of Control;

               (4)  there shall be a voluntary or involuntary dissolution,
liquidation or winding-up of the Company;

               (5)  the Company shall take or propose to take any other action,
notice of which is actually provided to or is required to be provided, pursuant
to any written agreement, to holders of its shares of the same class and series
as the Warrant Shares; or

               (6)  there shall be an IPO; then, in any one or more of said
cases, the Company shall give, by first class mail, postage prepaid, addressed
to the Holder of this Warrant at the address of such Holder as shown of the
books of the Company, (a) at least 10 days prior written notice of the date on
which the books of the Company shall close or a record shall be taken for such
dividends or distribution rights or for determining rights to vote in respect of
any such reorganization, reclassification, Change of

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Control, dissolution, liquidation or winding-up, and (b) in the case of any such
reorganization, reclassification, Change of Control, dissolution, liquidation or
winding-up, at least 10 days prior written notice of the date when the same is
reasonably expected to take place. Any notice given in accordance with the
foregoing clause (a) shall also specify, in the case of any such dividend,
distribution or subscription rights, the date on which the holders of shares of
the same class and series as the Warrant Shares shall be entitled thereto. Any
notice given in accordance with the foregoing clause (b) shall also specify the
date on which the holders of shares of the same class and series as the Warrant
Shares are reasonably expected to be entitled to exchange their stock for
securities or other property deliverable upon such reorganization,
reclassification, consolidation, merger, sale, Change of Control, dissolution,
liquidation or winding-up, as the case may be.

     5.   Issue Tax. The issuance of certificates for shares of the Warrant
Shares shall be made without charge to the Holder of the Warrant for any issue
tax in respect thereof; provided, however, that the Company shall not be
required to pay any tax which may be payable in respect of any transfer involved
in the issuance and delivery of any certificate in a name other than that of the
then Holder of the Warrant being transferred.

     6.   Enforceability. This Warrant has been duly authorized and executed by
the Company and is a valid and binding obligation of the Company enforceable in
accordance with its terms.

     7.   Closing of Books. The Company will at no time close its transfer books
against the transfer of any Warrant or of any shares of Warrant Shares in any
manner which interferes with the timely exercise of this Warrant.

     8.   No Voting or Dividend Rights; Limitation of Liability. Nothing
contained in this Warrant shall be construed as conferring upon the Holder
hereof the right to vote or to consent or to receive notice as a shareholder in
respect of meetings of shareholders for the election of directors of the Company
or any other matters or any rights whatsoever as a shareholder of the Company.
No dividends or interest shall be payable or accrued in respect of this Warrant
or the interest represented hereby or the shares purchasable hereunder until,
and only to the extent that, this Warrant shall have been exercised. No
provisions hereof, in the absence of affirmative action by the Holder to
purchase shares of capital stock, and no mere enumeration herein of the rights
or privileges of the Holder hereof, shall give rise to any liability of such
Holder for the Purchase Price or as a shareholder of the Company, whether such
liability is asserted by the Company or by its creditors.

     9.   Expiration. This Warrant shall expire upon the earliest of (a) at 5:00
PM on May 15, 2009, (b) one business day prior to an IPO, and (c) one business
day prior to consummation of a Change of Control.

     10.  Warrant Transferable. This Warrant and all rights hereunder are
transferable, in whole or in part, without charge to the Holder hereof (except
for transfer taxes), upon surrender of this Warrant properly endorsed. Each
Holder of this Warrant, by taking or holding the same,

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consents and agrees that this Warrant, when endorsed in blank, shall be deemed
negotiable, and that the Holder hereof, when this Warrant shall have been so
endorsed, may be treated by the Company and all other persons dealing with this
Warrant as the absolute owner hereof for any purpose and as transferee hereof on
the books of the Company any notice to the contrary notwithstanding, but, until
such transfer on such books, the Company may treat the registered owner hereof
as the owner for all purposes.

     11.  Modification and Waiver. This Warrant and any provision hereof may
only be amended, waived or modified upon written consent of the Company and
holders of in excess of 50% in interest of the Warrants issued under this form
of Stock Purchase Warrant, provided that all such Warrants, are amended, waived
or modified in a like manner.

     12.  Notices. Any notice, request or other document required or permitted
to be given or delivered to the Holder hereof or the Company shall be delivered
or shall be sent by certified or registered mail, postage prepaid, to the Holder
at its address as shown on the books of the Company or to the Company at the
address indicated on the first paragraph of this Warrant.

     13.  Descriptive Headings and Governing Law. The descriptive headings of
the several sections and paragraphs of this Warrant are inserted for convenience
only and do not constitute a part of this Warrant. This Warrant shall be
construed and enforced in accordance with, and the rights of the parties shall
be governed by, the laws of the State of California, without giving effect to
the conflict of laws principles thereof.

     14.  Lost Warrant or Stock Certificates. The Company agrees with the Holder
hereof that upon receipt of evidence reasonably satisfactory to the Company of
the loss, theft, destruction, or mutilation of any Warrant or stock certificate
and, in the case of any such loss, theft or destruction, upon receipt of an
indemnity reasonably satisfactory to the Company, or in the case of any such
mutilation upon surrender and cancellation of such Warrant or stock certificate,
the Company at its expense will make and deliver a new Warrant or stock
certificate, of like tenor, in lieu of the lost, stolen, destroyed or mutilated
Warrant or stock certificate.

     15.  Fractional Shares. No fractional shares shall be issued upon exercise
of this Warrant. The Company shall, in lieu of issuing any fractional share, pay
the Holder entitled to such fraction a sum in cash equal to such fraction
multiplied by the then effective Purchase Price.

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         IN WITNESS WHEREOF, the Company has caused this Warrant to be duly
executed by its duly authorized officers, effective as of the date first written
above.

COMPANY:                               HUDSON RESPIRATORY CARE INC.

                                       By:    /s/ Patrick G. Yount
                                              ----------------------------------

                                       Name:  Patrick G. Yount
                                              ----------------------------------

                                       Title: Chief Financial Officer
                                              ----------------------------------

                            SIGNATURE PAGE TO WARRANT

<PAGE>

                              FORM OF SUBSCRIPTION
                  (To be signed only upon exercise of Warrant)

To: ________________

     The undersigned, the Holder of the within Warrant, hereby irrevocably
elects to exercise the purchase right represented by such Warrant for, and to
purchase thereunder, _____________ ____________________________ (_____________)
shares of ____________ Stock of Hudson Respiratory Care Inc. and herewith makes
payment of ____________________ Dollars ($__________) thereof, and requests that
the certificates for such shares by issued in the name of, and delivered to
________________________________, whose address is

----------------- -------------------------------.

     The undersigned represents that it is acquiring such ________________ Stock
for its own account for investment and not with a view to or for sale in
connection with any distribution thereof (subject, however, to any requirement
of law that the disposition thereof shall at all times by within its control).

     DATED:
           ----------------------------

                                       -----------------------------------------
                                       (Signature must conform in all respects
                                       to name of Holder as specified on the
                                       face of the Warrant)

                                       -----------------------------------------

                                       -----------------------------------------
                                                     (Address)

<PAGE>

                                   ASSIGNMENT

     FOR VALUE RECEIVED, the undersigned, the Holder of the within Warrant,
hereby sells, assigns and transfers all of the rights of the undersigned under
the within Warrant, with respect to the number of shares of ________________
Stock covered thereby set forth herein below, unto:

Name of Assignee                        Address                  No. of Shares
----------------                        -------                  -------------

                                       DATED:
                                             --------------------------------

                                       ---------------------------------------
                                       (Signature must conform in all respects
                                       to name of Holder as specified on the
                                       face of the Warrant)<PAGE>

                                                                   Exhibit 10.30

     THIS NOTE HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 OR THE
     SECURITIES LAWS OF ANY STATE AND MAY NOT BE SOLD OR TRANSFERRED IN THE
     ABSENCE OF SUCH REGISTRATION OR AN EXEMPTION THEREFROM UNDER SAID ACT AND
     APPLICABLE STATE SECURITIES LAWS.

$                                                           Temecula, California
                                                               ___________, 200_

                    UNSECURED SENIOR PROMISSORY NOTE DUE 2004

     Hudson Respiratory Care Inc., a California corporation (the "Maker"), for
value received, promises to pay to _______________________ (the "Holder") the
principal sum of ____________________ Dollars and No Cents ($___________) on
December 31, 2004 (the "Maturity Date") as provided herein. The Maker also
promises to pay interest from the date of this Note until payment in full on the
unpaid principal balance as set forth in Section 1 below.

     1.   Interest. The interest rate payable hereunder shall be 12% per annum,
computed on the basis of the actual number of days elapsed and a year of 365
days. All interest hereunder shall begin to accrue on _______________ and shall
not be paid currently but shall accrue, such accruing amount to be compounded
quarterly as of the end of each calendar quarter commencing December 31, 2002,
and be payable in full on the Maturity Date in cash.

     2.   Prepayments. The principal balance of, and accrued interest on, this
Note may be prepaid at any time, in whole or in part, without premium or
penalty. Any such prepayment shall be first applied to the payment of any
accrued interest and then to the unpaid balance of the principal amount.

     3.   Events of Default. If any of the following events (each, an "Event of
Default") shall occur:

          (a)  the Maker shall fail to make any payment hereunder when due and
payable; or

          (b)  the Maker shall fail to make any payment under any indebtedness
of the Maker that is outstanding in an aggregate principal amount of at least
$15,000,000 due and payable either (i) at the final stated maturity of such
indebtedness or (ii) at any other time if, as a result of such nonpayment, the
maturity of such indebtedness is accelerated; or

          (c)  the Maker shall generally fail to pay, or admit in writing its
inability to pay, its debts as they become due, or shall voluntarily commence
any proceeding or file any petition under any bankruptcy, insolvency or similar
federal, state or foreign law or seeking dissolution, liquidation or
reorganization or the appointment of a receiver, trustee, custodian or
liquidator for it or a substantial portion of its property, assets or business
or to effect a plan or

<PAGE>

other arrangement with its creditors, or shall file any answer admitting the
jurisdiction of the court and the material allegations of an involuntary
petition filed against it in any bankruptcy, insolvency or similar proceeding,
or shall be adjudicated bankrupt, or shall make a general assignment for the
benefit of creditors, or shall consent to, or acquiesce in the appointment of, a
receiver, trustee, custodian or liquidator for a substantial portion of its
property, assets or business, or shall by any act or failure to act indicate its
consent to or approval of any of the foregoing, or if any corporate action is
taken by the Maker for the purpose of effecting any of the foregoing; or

          (d)  involuntary proceedings or an involuntary petition shall be
commenced or filed against the Maker under any bankruptcy, insolvency or similar
federal, state or foreign law or seeking the dissolution, liquidation or
reorganization of it or the appointment of a receiver, trustee, custodian or
liquidator for it or of a substantial part of its property, assets or business,
and such proceedings or petition shall not be dismissed within 60 days; or any
writ, judgment, tax lien, warrant of attachment, execution or similar process
shall be issued or levied against a substantial part of its property, assets or
business, and such writ, judgment, lien, warrant of attachment, execution or
similar process shall not be released, vacated or fully bonded, within 60 days
after commencement, filing or levy, as the case may be, or any order for relief
shall be entered in any such proceeding; or any winding-up, dissolution,
liquidation or reorganization of the Maker; then, and in every such event, and
at any time thereafter during the continuance of such event, (i) in the case of
an Event of Default under clauses (a) and (b), the Holders of a majority of the
outstanding principal amount of all Notes may declare all principal and accrued
interest and all other fees and other obligations of the Maker under the Notes
to be due and payable, and (ii) in the case of an Event of Default under clauses
(c) or (d), all principal and accrued interest on all outstanding Notes and all
fees and other obligations of the Maker due under the Notes will be immediately
due and payable without any further declaration or other act on the part of the
Holders, in either case without presentment, demand, protest or other notice of
any kind, all of which are hereby waived by the Maker.

     4.   Series of Notes; Actions by Majority. This Note is one of a series of
Notes of like tenor issued in an original aggregate principal amount of up to
$12,000,000. When actions are specified herein as happening upon the decision of
holders of a majority in outstanding principal amount of the Notes, such action
shall be evidenced by a writing executed by such Holders and delivered to all
Holders of Notes and shall be the act of and binding on all Holders.

     5.   Costs and Expenses. The Maker promises to pay all costs and expenses,
including reasonable attorneys' fees, incurred by the Holder in connection with
the enforcement of, or collection of any amounts due under, this Note.

     6.   Successors and Assigns. This Note shall be binding upon, and shall
inure to the benefit of, the Maker and the Holder and their respective
successors and assigns; provided, however, that neither this Note nor any of the
rights, interests or obligations hereunder may be assigned, by operation of law
or otherwise, in whole or in part, by the Maker without the prior written
consent of the Holder except in connection with an assignment in whole to a
successor Maker to the Maker in a merger of the Maker or a sale of all or
substantially all of the Maker's property and assets and then only if the
Holder's rights hereunder are not impaired.

                                       2

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     7.   Modifications and Amendments; Reissuance of Note. This Note may only
be modified, amended, or terminated (other than by payment in full) by an
agreement in writing signed by the Maker and the Holders of a majority in
principal amount of all Notes. No waiver of any term, covenant or provision of
this Note shall be effective unless given in writing by the Holders of a
majority in principal amount of all Notes. Upon receipt of evidence reasonably
satisfactory to the Maker of the loss, theft, destruction, or mutilation of this
Note and of an agreement of indemnity reasonably satisfactory to the Maker, and
upon surrender or cancellation of this Note, if mutilated, the Maker will make
and deliver a new Note of like tenor in lieu of such lost, stolen, destroyed, or
mutilated Note.

     8.   Remedies Cumulative. Each and every right, power and remedy herein
given to the Holder, or otherwise existing, shall be cumulative and not
exclusive and be in addition to all other rights, powers and remedies now or
hereafter granted (including, without limitation, other rights of set-off under
applicable law) or otherwise existing. Each and every right, power and remedy
whether specifically herein given or otherwise existing may be exercised from
time to time and as often and in such order as may be deemed expedient by the
Holder.

     9.   Notices. All notices and other communications required or permitted
hereunder shall be in writing and shall be mailed by registered or certified
mail, postage prepaid, or otherwise delivered by facsimile, hand or by messenger
(which may be by overnight delivery service), addressed (a) if to the Maker, at
the address and facsimile number set forth on the signature page to this Note or
at such other address and facsimile number as the Maker shall have furnished to
the Holder by first class mail, or (b) if to the Holder, at the address
specified at the foot of this Note, or at such other address and facsimile
number as the Holder shall have furnished to the Maker by first class mail.

     10.  Waiver. The Holder shall not by any act (except by a written
instrument in accordance with the immediately preceding paragraph), delay,
indulgence, omission or otherwise be deemed to have waived any right or remedy
hereunder or to have acquiesced in any default or Event of Default or in any
breach of any of the terms and conditions hereof. No failure to exercise, nor
any delay in exercising, on the part of the Holder, any right, power or
privilege hereunder shall operate as a waiver thereof. No single or partial
exercise of any right, power or privilege hereunder shall preclude any other or
further exercise thereof or the exercise of any other right, power or privilege.
A waiver by the Holder of any right or remedy hereunder on any one occasion
shall not be construed as a bar to any right or remedy which the Holder would
otherwise have on any future occasion. The rights and remedies herein provided
are cumulative, may be exercised singly or concurrently and are not exclusive of
any rights or remedies provided by law.

     11.  Governing Law. This Note shall be construed in accordance with the
laws of the State of California, without regard to the conflicts of law
provisions of the State of California or of any other state.

     12.  Jurisdiction. ALL LEGAL ACTIONS OR PROCEEDINGS BROUGHT AGAINST THE
MAKER WITH RESPECT TO THIS NOTE MAY BE BROUGHT IN ANY STATE OR FEDERAL COURT OF
COMPETENT JURISDICTION IN THE STATE OF CALIFORNIA, AND BY EXECUTION AND DELIVERY
OF THIS NOTE THE MAKER

                                       3

<PAGE>

ACCEPTS FOR ITSELF AND IN CONNECTION WITH ITS PROPERTIES, THE JURISDICTION OF
THE AFORESAID COURTS. THE MAKER HEREBY EXPRESSLY AND IRREVOCABLY WAIVES ANY
CLAIM OR DEFENSE IN ANY SUCH ACTION OR PROCEEDING BASED ON ANY ALLEGED LACK OF
PERSONAL JURISDICTION, IMPROPER VENUE OR FORUM NON CONVENIENS OR ANY SIMILAR
BASIS. THE MAKER FURTHER IRREVOCABLY CONSENTS TO THE SERVICE OF ANY COMPLAINT,
SUMMONS, NOTICE OR OTHER PROCESS RELATING TO ANY LEGAL ACTION OR PROCEEDING BY
DELIVERY THEREOF TO IT BY HAND OR BY MAIL TO THE ADDRESS OF THE MAKER SET FORTH
ABOVE. NOTHING HEREIN SHALL AFFECT THE RIGHT OF A HOLDER TO BRING PROCEEDINGS
AGAINST THE MAKER IN THE COURTS OF ANY OTHER JURISDICTION OR TO SERVE PROCESS IN
ANY MANNER PERMITTED BY LAW.

     13.  Interest. The rate of interest payable under this Note shall in no
event exceed the maximum rate permissible under applicable law. If the rate of
interest payable on this Note is ever reduced as a result of this paragraph and
at any time thereafter the maximum rate permitted under applicable law exceeds
the rate of interest provided for in this Note, then the rate provided for in
this Note shall be increased to the maximum rate provided for under applicable
law for such period as is required so that the total amount of interest received
by the Holder is that which would have been received by the Holder but for the
operation of the first sentence of this paragraph.

     14.  Designation of Senior Debt. The obligations contemplated by this Note
(and the Notes in the aggregate) shall constitute "Designated Senior Debt" as
defined in and for purposes of that certain Indenture dated as of April 7, 1998
among the Maker, River Holding Corp. and the Untied States Trust Company of New
York, as Trustee, with respect to the 9 1/8% Senior Subordinated Notes due 2008.

     15.  Payments. All payments of principal and interest shall be made in
legal tender of the United States of America and shall be made at such place as
Holder shall have designated to Maker.

                                       4

<PAGE>

     IN   WITNESS WHEREOF, the Maker has caused this Note to be signed on the
date first set forth above.

MAKER:                                      HUDSON RESPIRATORY CARE INC.

                                            By:
                                                -------------------------
                                            Name:
                                            Title:

                                            Notice Address:
                                            27111 Diaz Road
                                            P.O. Box 9020
                                            Temecula, California  92589-9020
                                            Facsimile: (909) 676-1578

NOTICE ADDRESS
FOR HOLDER:

-----------------------

-----------------------

-----------------------

                                SIGNATURE PAGE TO
                    UNSECURED SENIOR PROMISSORY NOTE DUE 2004

                                       5

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