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                                                                   Exhibit 10.25

                             STOCK PLEDGE AGREEMENT
                             ----------------------
                                   (BORROWER)
                                   ----------

          This STOCK PLEDGE AGREEMENT (this "Agreement"), dated as of October 7,
2003, is entered into by and among HUDSON RESPIRATORY CARE INC., a California
corporation ("Borrower"), IH Holding LLC, a Delaware limited liability company
("Guarantor", together with the Borrower, collectively the "Pledgor"), and MW
POST ADVISORY GROUP, LLC, a Delaware limited liability company, as
administrative agent for the Lenders (in such capacity, together with its
successors, if any, in such capacity, "Agent"), with reference to the following:

          WHEREAS, Borrower, the Lenders (such Lenders, together with Agent,
individually and collectively, the "Lender Group"), and Agent have entered into
that certain Loan and Security Agreement, dated as of even date herewith (as
amended, restated, modified, supplemented, refinanced, renewed, or extended from
time to time, the "Loan Agreement"), pursuant to which the Lender Group has
agreed to make certain financial accommodations to Pledgor;

          WHEREAS, contemporaneously herewith, Guarantor has executed and
delivered that certain General Continuing Guaranty (the "Guaranty") and that
certain Security Agreement (Guarantors) (the "Security Agreement") in favor of
Agent respecting certain obligations of the Borrower to the Lender Group in
connection with the Loan Agreement.

          WHEREAS, Pledgor beneficially owns the specified Equity Interests
identified as Pledged Interests in the Persons identified as Issuers listed
under the name of Pledgor on Schedule A attached hereto (or any addendum
thereto); and

          WHEREAS, to induce the Lender Group to make the financial
accommodations provided to the Pledgor pursuant to the Loan Agreement, Pledgor
desires to pledge, grant, transfer, and assign to Agent, for the benefit of the
Lender Group, a security interest in the Pledged Collateral (as hereinafter
defined) to secure the Secured Obligations (as hereinafter defined), as provided
herein.

          NOW, THEREFORE, in consideration of the mutual promises, covenants,
representations, and warranties set forth herein and for other good and valuable
consideration, the parties hereto agree as follows:

          1.   Definitions And Construction.

          (a)  Definitions. Capitalized terms used herein and not
otherwise defined herein shall have the meanings ascribed to them in the Loan
Agreement. The following terms, as used in this Agreement, shall have the
following meanings:

               "Agent" shall have the meaning set forth in the preamble to this
     Agreement, together with its successors or assigns.

               "Agreement" has the meaning set forth in the preamble to this
     Agreement.

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               "Chief Executive Office" shall mean the Chief Executive Office
     listed on Schedule B.

               "Equity Interests" shall mean all shares, units, options,
     warrants, interests, participations, or other equivalents (regardless of
     how designated) of or in a corporation, partnership, limited liability
     company, or equivalent entity, whether voting or nonvoting, including
     general partner partnership interests, limited partner partnership
     interests, common stock, preferred stock, or any other "equity security"
     (as such term is defined in Rule 3a11-1 of the General Rules and
     Regulations promulgated by the SEC under the Exchange Act).

               "Exchange Act" shall mean the Securities Exchange Act of 1934, as
     amended, and any successor statute.

               "Excluded Collateral" shall have the meaning ascribed to such
     term in the Loan Agreement.

               "Future Rights" shall mean, with respect to each Issuer, (i) all
     Equity Interests (other than Pledged Interests) of such Issuer, and all
     securities convertible or exchangeable into, and all warrants, options, or
     other rights to purchase, Equity Interests of such Issuer; (ii) to the
     extent of Pledgor's interest therein, all shares of, all securities
     convertible or exchangeable into, and all warrants, options, or other
     rights to purchase Equity Interests of any Person in which Pledgor, after
     the date of this Agreement, acquires a direct equity interest, irrespective
     of whether such Person is or becomes a Subsidiary of Pledgor; and (iii) the
     certificates or instruments representing such additional Equity Interests,
     convertible or exchangeable securities, warrants, and other rights and all
     dividends, cash, options, warrants, rights, instruments, and other property
     or proceeds from time to time received, receivable, or otherwise
     distributed in respect of or in exchange for any or all of such Equity
     Interests.

               "Guarantor" shall have the meaning set forth in the preamble to
     this Agreement.

               "Guaranty" shall have the meaning set forth in the recitals to
     this Agreement.

               "Holder" and "Holders" shall have the meanings set forth in
     Section 3 of this Agreement.

               "HRC Certificates" means the certificates evidencing the capital
     stock of HRC Holding Inc., a Delaware corporation.

               "Intercreditor Agreement" means that certain intercreditor
     agreement between WFF and Post dated as of an even date herewith.

                                       -2-

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               "Issuers" shall mean each of the Persons identified as an Issuer
     on Schedule A attached hereto (or any addendum thereto), and any successors
     thereto, whether by merger or otherwise.

               "Lender Group" shall have the meaning set forth in the recitals
     to this Agreement.

               "Lenders" means, individually and collectively, each of the
     financial institutions identified on the signature pages of the Loan
     Agreement, and any other person made a party thereto in accordance with the
     provisions of Section 14 thereof (together with their respective successors
     and assigns).

               "Loan Agreement" shall have the meaning set forth in the recitals
     to this Agreement.

               "Pledged Collateral" shall mean the Pledged Interests, the Future
     Rights, and the Proceeds, collectively but excluding the Excluded
     Collateral.

               "Pledged Interests" shall mean with respect to each Issuer, all
     of the Equity Interests identified as Pledged Interests of such Issuer on
     Schedule A attached hereto (or any addendum thereto).

               "Pledgor" has the meaning set forth in the preamble to this
     Agreement.

               "Post" means MW Post Advisory Group, LLC, a Delaware limited
     liability company.

               "Proceeds" shall mean all proceeds (including proceeds of
     proceeds) of the Pledged Interests and Future Rights including all: (a)
     rights, benefits, distributions, premiums, profits, dividends, interest,
     cash, instruments, documents of title, accounts, contract rights,
     inventory, equipment, general intangibles, deposit accounts, chattel paper,
     and other property from time to time received, receivable, or otherwise
     distributed in respect of or in exchange for, or as a replacement of or a
     substitution for, any of the Pledged Interests, Future Rights, or proceeds
     thereof (including any cash, Equity Interests, or other securities or
     instruments issued after any recapitalization, readjustment,
     reclassification, merger or consolidation with respect to any Issuer and
     any security entitlements, as defined in the Code, with respect thereto);
     (b) "proceeds," as such term is defined in the Code; (c) proceeds of any
     insurance, indemnity, warranty, or guaranty (including guaranties of
     delivery) payable from time to time with respect to any of the Pledged
     Interests, Future Rights, or proceeds thereof; (d) payments (in any form
     whatsoever) made or due and payable to Pledgor from time to time in
     connection with any requisition, confiscation, condemnation, seizure or
     forfeiture of all or any part of the Pledged Interests, Future Rights, or
     proceeds thereof; and (e) other amounts from time to time paid or payable
     under or in connection with any of the Pledged Interests, Future Rights, or
     proceeds thereof.

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               "SEC" shall mean the United States Securities and Exchange
     Commission and any successor thereto.

               "Secured Obligations" shall mean, with respect to Pledgor, all
     liabilities, obligations, or undertakings owing by Pledgor to the Lender
     Group of any kind or description arising out of or outstanding under,
     advanced or issued pursuant to, or evidenced by the Loan Agreement, the
     Guaranty, the Security Agreement, this Agreement, or any of the other Loan
     Documents, irrespective of whether for the payment of money, whether direct
     or indirect, absolute or contingent, due or to become due, voluntary or
     involuntary, whether now existing or hereafter arising, and including all
     interest (including interest that accrues after the filing of a case under
     the Bankruptcy Code) and any and all costs, fees (including attorneys
     fees), and expenses which Pledgor is required to pay pursuant to any of the
     foregoing, by law, or otherwise.

               "Securities Act" shall have the meaning set forth in Section 9(c)
     of this Agreement.

               "Security Agreement" shall have the meaning set forth in the
     recitals to this Agreement.

               "WFF" means Wells Fargo Foothill, Inc., a California corporation,
     its successors and permitted assigns.

          (b)  Construction.

                    (i)    Unless the context of this Agreement clearly requires
otherwise, references to the plural include the singular and to the singular
include the plural, the term "including" is not limiting, and the term "or" has,
except where otherwise indicated, the inclusive meaning represented by the
phrase "and/or." The words "hereof," "herein," "hereby," "hereunder," and other
similar terms in this Agreement refer to this Agreement as a whole and not
exclusively to any particular provision of this Agreement. Article, section,
subsection, exhibit, and schedule references are to this Agreement unless
otherwise specified. All of the exhibits or schedules attached to this Agreement
shall be deemed incorporated herein by reference. Any reference to any of the
following documents includes any and all alterations, amendments, restatements,
extensions, modifications, renewals, or supplements thereto or thereof, as
applicable: this Agreement, the Loan Agreement, or any of the other Loan
Documents.

                    (ii)   Neither this Agreement nor any uncertainty or
ambiguity herein shall be construed or resolved against Agent or Pledgor,
whether under any rule of construction or otherwise. On the contrary, this
Agreement has been reviewed by each of the parties signatory hereto and their
respective counsel and shall be construed and interpreted according to the
ordinary meaning of the words used so as to fairly accomplish the purposes and
intentions of the parties hereto.

                    (iii)  In the event of any direct conflict between the
express terms and provisions of this Agreement and of the Loan Agreement or the
Security Agreement,

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the terms and provisions of the Loan Agreement or the Security Agreement, as
applicable, shall control.

          2.   Pledge. Pledgor hereby pledges, grants, transfers, and assigns to
Agent, for the benefit of the Lender Group, a security interest in all of
Pledgor's right, title, and interest in and to the Pledged Collateral in order
to secure prompt repayment of any and all of the Secured Obligations in
accordance with the terms and conditions of the Loan Documents to which Pledgor
is a party, and in order to secure prompt performance by Pledgor of its
covenants and duties under each Loan Document to which it is a party. Anything
contained in this Agreement or any other Loan Document to the contrary
notwithstanding, except for Permitted Dispositions, Pledgor has no authority,
express or implied, to dispose of any item or portion of the Pledged Collateral.

          3.   Delivery and Registration of Pledged Collateral.

          (a)  All certificates or instruments representing or evidencing the
Pledged Collateral shall be promptly delivered by Pledgor to Agent or Agent's
designee pursuant hereto at a location designated by Agent and shall be held by
or on behalf of Agent pursuant hereto, and shall be in suitable form for
transfer by delivery, or shall be accompanied by duly executed instruments of
transfer or assignment in blank, all in form and substance reasonably
satisfactory to Agent.

          (b)  Upon the occurrence and during the continuance of an Event of
Default, Agent shall have the right, at any time in its discretion and without
notice to Pledgor, to transfer to or to register on the books of the Issuers (or
of any other Person maintaining records with respect to the Pledged Collateral)
in the name of Agent or any of its nominees any or all of the Pledged
Collateral. In addition, Agent shall have the right at any time to exchange
certificates or instruments representing or evidencing Pledged Collateral for
certificates or instruments of smaller or larger denominations.

          (c)  If, at any time and from time to time, any Pledged Collateral
(including any certificate or instrument representing or evidencing any Pledged
Collateral) is in the possession of a Person other than Agent (or an agent of
Agent) or Pledgor (a "Holder"), then Pledgor shall promptly, at Agent's option,
either cause such Pledged Collateral to be delivered into Agent's or Agent's
designee's possession, or execute and deliver to such Holder a written
notification/instruction, and take all other steps necessary to perfect the
security interest of Agent in such Pledged Collateral, including obtaining from
such Holder a written acknowledgment that such Holder holds such Pledged
Collateral for Agent, all pursuant to the Code or other applicable law governing
the perfection of Agent's security interest in the Pledged Collateral in the
possession of such Holder. Each such notification/instruction and acknowledgment
shall be in form and substance reasonably satisfactory to Agent.

          (d)  Any and all Pledged Collateral (including dividends, interest,
and other cash distributions) at any time received or held by Pledgor shall be
so received or held in trust for Agent, shall be segregated from other funds and
property of Pledgor and shall be forthwith delivered to Agent or Agent's
designee in the same form as so received or held, with any

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necessary endorsements; provided that cash dividends or distributions received
by Pledgor, if and to the extent they are not prohibited by the Loan Agreement,
may be retained by Pledgor in accordance with Section 4 and used in the ordinary
course of Pledgor's business, or as otherwise expressly permitted under the Loan
Documents.

          (e)  If at any time and from time to time any Pledged Collateral
consists of an uncertificated security or a security in book entry form, then
Pledgor shall promptly cause such Pledged Collateral to be registered or
entered, as the case may be, in the name of Agent, for the benefit of the Lender
Group, or otherwise cause the security interest held by Agent, for the benefit
of the Lender Group, to be perfected in accordance with applicable law.

          (f)  The Agent acknowledges that the exercise of the powers or rights
granted in this Section 3 may at some times be subject to the provisions of the
Intercreditor Agreement.

          4.   Voting Rights and Dividends.

          (a)  So long as no Event of Default shall have occurred and be
continuing, Pledgor shall be entitled to exercise any and all voting and other
consensual rights pertaining to the Pledged Collateral or any part thereof for
any purpose not inconsistent with the terms of the Loan Documents.

          (b)  Upon the occurrence and during the continuance of an Event of
Default, at the election of Agent in its Permitted Discretion, upon the receipt
by Pledgor of written notice of such election by Agent, all rights of Pledgor to
exercise the voting and other consensual rights or receive and retain cash
dividends or distributions that it would otherwise be entitled to exercise or
receive and retain, as applicable pursuant to Section 4(a), shall cease, and all
such rights shall thereupon become vested in Agent, who shall thereupon have the
sole right to exercise such voting or other consensual rights and to receive and
retain such cash dividends and distributions. Upon the receipt of such written
notice, Pledgor shall execute and deliver (or cause to be executed and
delivered) to Agent all such proxies and other instruments as Agent may
reasonably request for the purpose of enabling Agent to exercise the voting and
other rights which it is entitled to exercise and to receive the dividends and
distributions that it is entitled to receive and retain pursuant to the
preceding sentence.

          (c)  The Agent acknowledges that the exercise of the powers granted in
this Section 4 may at some times be subject to the provisions of the
Intercreditor Agreement.

          5.   Representations and Warranties. Pledgor represents, warrants, and
covenants as follows:

          (a)  Pledgor has taken all steps it deems necessary or appropriate to
be informed on a continuing basis of changes or potential changes affecting the
Pledged Collateral (including rights of conversion and exchange, rights to
subscribe, payment of dividends, reorganizations or recapitalization, tender
offers and voting rights), and Pledgor agrees that no member of the Lender Group
shall have any responsibility or liability for informing Pledgor of any such
changes or potential changes or for taking any action or omitting to take any
action with respect thereto;

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          (b)  All information herein or contained in or delivered pursuant to
the Loan Documents supplied to Agent or any other member of the Lender Group by
and prepared by Pledgor or any Subsidiary of Pledgor in writing with respect to
the Pledged Collateral is, or in the case of information hereafter supplied will
be, accurate and complete in all material respects;

          (c)  Pledgor is and will be the sole legal and beneficial owner of the
Pledged Collateral (including the Pledged Interests and all other Pledged
Collateral acquired by Pledgor after the date hereof) free and clear of any
adverse claim, Lien, or other right, title, or interest of any party, other than
the Liens held by Agent for the benefit of the Lender Group and Permitted Liens;

          (d)  This Agreement, and the delivery to Agent of certificates, if
any, representing Pledged Collateral (or the delivery to all Holders of such
certificates, if any, representing Pledged Collateral of the
notification/instruction referred to in Section 3 of this Agreement and the
acknowledgement of such Holders referred to in Section 3), creates a valid,
perfected, and second priority security interest, junior only to the security
interests of WFF to the extent set forth in the Intercreditor Agreement (except
that the security interest in the HRC Certificates shall be a first priority
security interest), in one hundred percent (100%) of the Pledged Interests which
are in certificated form in favor of Agent securing payment of the Secured
Obligations, and all actions necessary to achieve such perfection have been duly
taken;

          (e)  Schedule A to this Agreement is true and correct and complete in
all material respects as of the date hereof; without limiting the generality of
the foregoing, as of the date hereof: (i) except as set forth in Schedule A, all
the Pledged Interests are in certificated form, and, except to the extent
registered in the name of Agent or its nominee pursuant to the provisions of
this Agreement, are registered in the name of Pledgor; and (ii) the Pledged
Interests as to each of the Issuers constitute at least the percentage of all
the fully diluted issued and outstanding Equity Interests of such Issuer as set
forth in Schedule A to this Agreement;

          (f)  the Pledged Interests that are interests in general partnerships,
limited partnerships or limited liability companies (i) are not dealt in or
traded on securities exchanges or in securities markets, (ii) do not have terms
expressly providing that they are securities governed by Article 8 of the Code,
and (iii) are not investment company securities, and are not, therefore,
"securities" governed by Article 8 of the Code;

          (g)  There are no presently existing Future Rights owned by Pledgor as
of the date hereof;

          (h)  The Pledged Interests have been duly authorized and validly
issued and, with respect to the HRC Certificates, are fully paid and
nonassessable; and

          (i)  Neither the pledge of the Pledged Collateral pursuant to this
Agreement nor the extensions of credit represented by the Secured Obligations
violates Regulation T, U or X of the Board of Governors of the Federal Reserve
System.

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          6.   Further Assurances.

          (a)  Pledgor agrees that from time to time, at its expense, it will
promptly execute and deliver all further instruments and documents, and take all
further action that may be necessary or reasonably desirable, or that Agent, on
behalf of the Lender Group, may request, in order to perfect and protect any
security interest granted or purported to be granted hereby or to enable Agent,
on behalf of the Lender Group, to exercise and enforce its rights and remedies
hereunder with respect to any Pledged Collateral. Without limiting the
generality of the foregoing, Pledgor will: (i) at the request of Agent, mark
conspicuously each of its records pertaining to the Pledged Collateral with a
legend, in form and substance reasonably satisfactory to Agent, indicating that
such Pledged Collateral is subject to the security interest granted hereby; (ii)
execute and file such financing or continuation statements, or amendments
thereto, and such other instruments or notices, as may be necessary or
reasonably desirable, or as Agent may reasonably request, in order to perfect
and preserve the security interests granted or purported to be granted hereby;
(iii) allow inspection of the Pledged Collateral by Agent or Persons designated
by Agent; and (iv) appear in and defend any action or proceeding that may affect
Pledgor's title to or Agent's security interest in the Pledged Collateral.

          (b)  Pledgor hereby authorizes Agent, on behalf of the Lender Group,
to file one or more financing or continuation statements, and amendments
thereto, relative to all or any part of the Pledged Collateral without Pledgor's
signature where permitted by law. A carbon, photographic, or other reproduction
of this Agreement or any financing statement covering the Pledged Collateral or
any part thereof shall be sufficient as a financing statement where permitted by
law.

          (c)  Pledgor will furnish to Agent, upon the request of Agent: (i) a
certificate executed by an authorized officer of Pledgor, and dated as of the
date of delivery to Agent, itemizing in such detail as Agent may request, the
Pledged Collateral which, as of the date of such certificate, has been delivered
to Agent by Pledgor pursuant to the provisions of this Agreement; and (ii) such
statements and schedules further identifying and describing the Pledged
Collateral and such other reports in connection with the Pledged Collateral as
Agent may request.

          7.   Covenants of Pledgor. Pledgor shall:

          (a)  Perform each and every covenant in the Loan Documents applicable
to Pledgor;

          (b)  At all times keep at least one complete set of its records
concerning substantially all of the Pledged Collateral at its Chief Executive
Office as set forth in Schedule B hereto, and not change the location of its
Chief Executive Office or such records without giving Agent at least thirty (30)
days prior written notice thereof;

          (c)  To the extent it may lawfully do so, use its best efforts to
prevent the Issuers from issuing Future Rights or Proceeds, except for cash
dividends and other distributions,

                                       -8-

<PAGE>

if any, that are not prohibited by the terms of the Loan Agreement to be paid by
any Issuer to Pledgor;

          (d)  Upon receipt by Pledgor of any material notice, report, or other
communication from any of the Issuers or any Holder relating to all or any part
of the Pledged Collateral, deliver such notice, report or other communication to
Agent promptly, but in no event later than five (5) days following the receipt
thereof by Pledgor; and

          (e)  Not permit any of the Issuers to: (i) authorize the amendment of
or amend the Governing Documents of such Issuer that is a general partnership,
limited partnership or limited liability company to provide that the Equity
Interests of such Issuer is governed by Article 8 of the Code, or (ii) authorize
the issuance of or issue certificates evidencing the Equity Interests of such
Issuer that is a general partnership, limited partnership or limited liability
company.

          8.   Agent as Pledgor's Attorney-in-Fact.

          (a)  Pledgor hereby irrevocably appoints Agent, on behalf of the
Lender Group, as Pledgor's attorney-in-fact, with full authority in the place
and stead of Pledgor and in the name of Pledgor, Agent or otherwise, from time
to time at Agent's discretion, to take any action and to execute any instrument
that Agent, on behalf of the Lender Group, may reasonably deem necessary or
advisable to accomplish the purposes of this Agreement, including: (i) upon the
occurrence and during the continuance of an Event of Default, to receive,
endorse, and collect all instruments made payable to Pledgor representing any
dividend, interest payment or other distribution in respect of the Pledged
Collateral or any part thereof to the extent permitted hereunder and to give
full discharge for the same and to execute and file governmental notifications
and reporting forms; (ii) to issue any notifications/instructions Agent deems
necessary pursuant to Section 3 of this Agreement; or (iii) to arrange for the
transfer of the Pledged Collateral on the books of any of the Issuers or any
other Person to the name of Agent or to the name of Agent's nominee.

          (b)  In addition to the designation of Agent as Pledgor's
attorney-in-fact in subsection (a), Pledgor hereby irrevocably appoints Agent,
on behalf of the Lender Group, as Pledgor's agent and attorney-in-fact to make,
execute and deliver any and all documents and writings which may be necessary or
appropriate for approval of, or be required by, any regulatory authority located
in any city, county, state or country where Pledgor or any of the Issuers engage
in business, in order to transfer or to more effectively transfer any of the
Pledged Interests or otherwise enforce the rights granted hereunder to the
Lender Group.

          (c)  The Agent acknowledges that the exercise of the powers granted in
this Section 8 may at some times be subject to the provisions of the
Intercreditor Agreement.

          9.   Remedies upon Default. Upon the occurrence and during the
continuance of an Event of Default, subject to the terms of the Intercreditor
Agreement:

          (a)  Agent, on behalf of the Lender Group, may exercise in respect of
the Pledged Collateral, in addition to other rights and remedies provided for
herein or otherwise

                                       -9-

<PAGE>

available to it, all the rights and remedies of a secured party on default under
the Code (irrespective of whether the Code applies to the affected items of
Pledged Collateral), and Agent, on behalf of the Lender Group, may also without
notice (except as specified below) sell the Pledged Collateral or any part
thereof in one or more parcels at public or private sale, at any exchange,
broker's board or at any of Agent's offices or elsewhere, for cash, on credit or
for future delivery, at such time or times and at such price or prices and upon
such other terms as Agent may deem commercially reasonable, irrespective of the
impact of any such sales on the market price of the Pledged Collateral. To the
maximum extent permitted by applicable law, Agent may be the purchaser of any or
all of the Pledged Collateral at any such sale and shall be entitled, for the
purpose of bidding and making settlement or payment of the purchase price for
all or any portion of the Pledged Collateral sold at any such public sale, to
use and apply all or any part of the Secured Obligations as a credit on account
of the purchase price of any Pledged Collateral payable at such sale. Each
purchaser at any such sale shall hold the property sold absolutely free from any
claim or right on the part of Pledgor, and Pledgor hereby waives (to the extent
permitted by law) all rights of redemption, stay, or appraisal that it now has
or may at any time in the future have under any rule of law or statute now
existing or hereafter enacted. Pledgor agrees that, to the extent notice of sale
shall be required by law, at least ten (10) calendar days notice to Pledgor of
the time and place of any public sale or the time after which a private sale is
to be made shall constitute reasonable notification. Agent shall not be
obligated to make any sale of Pledged Collateral regardless of notice of sale
having been given. Agent may adjourn any public or private sale from time to
time by announcement at the time and place fixed therefor, and such sale may,
without further notice, be made at the time and place to which it was so
adjourned. Subject to subsection (b), to the maximum extent permitted by law,
Pledgor hereby waives any claims against Agent arising because the price at
which any Pledged Collateral may have been sold at such a private sale was less
than the price that might have been obtained at a public sale, even if Agent
accepts the first offer received and does not offer such Pledged Collateral to
more than one offeree.

          (b)  Pledgor hereby agrees that any sale or other disposition of the
Pledged Collateral conducted in conformity with reasonable commercial practices
of banks, insurance companies, or other financial institutions in the City of
Los Angeles, State of California in disposing of property similar to the Pledged
Collateral shall be deemed to be commercially reasonable.

          (c)  Pledgor hereby acknowledges that the sale by Agent of any Pledged
Collateral pursuant to the terms hereof in compliance with the Securities Act of
1933 as now in effect or as hereafter amended, or any similar statute hereafter
adopted with similar purpose or effect (the "Securities Act"), as well as
applicable "Blue Sky" or other state securities laws may require strict
limitations as to the manner in which Agent or any subsequent transferee of the
Pledged Collateral may dispose thereof. In light of this, Pledgor acknowledges
and agrees that in order to protect Agent's interest it may be necessary to sell
the Pledged Collateral at a price less than the maximum price attainable if a
sale were delayed or were made in another manner, such as a public offering
under the Securities Act. Pledgor has no objection to sale in such a manner and
agrees that Agent shall have no obligation to obtain the maximum possible price
for the Pledged Collateral as long as any sale is made in a commercially
reasonable manner. Without limiting the generality of the foregoing, Pledgor
agrees that, upon the occurrence and during the

                                      -10-

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continuation of an Event of Default, Agent may, subject to applicable law, from
time to time attempt to sell all or any part of the Pledged Collateral by a
private placement, restricting the bidders and prospective purchasers to those
who will represent and agree that they are purchasing for investment only and
not for distribution. In so doing, Agent may solicit offers to buy the Pledged
Collateral or any part thereof for cash, from a limited number of investors
deemed by Agent, in its reasonable judgment, to be institutional investors or
other responsible parties who might be interested in purchasing the Pledged
Collateral. If Agent shall solicit such offers, then Pledgor acknowledges that
the acceptance by Agent of one of the offers shall not be deemed per se to not
be a commercially reasonable method of disposition of the Pledged Collateral.

          (d)  If Agent shall determine to exercise its right to sell all or any
portion of the Pledged Collateral pursuant to this Section, Pledgor agrees that,
upon request of Agent, Pledgor will, at no expense to any member of the Lender
Group:

                    (i)    execute and deliver, and, use commercially reasonably
efforts to, cause the Issuers and the directors and officers thereof to execute
and deliver, all such instruments and documents, and to do or use commercially
reasonably efforts to cause to be done all such other acts and things, as may be
necessary or, in the opinion of Agent, advisable to register such Pledged
Collateral under the provisions of the Securities Act, and use commercially
reasonable efforts to cause the registration statement relating thereto to
become effective and to remain effective for such period as prospectuses are
required by law to be furnished, and to make all amendments and supplements
thereto and to the related prospectuses which, in the opinion of Agent, are
necessary or advisable, all in conformity with the requirements of the
Securities Act and the rules and regulations of the Securities and Exchange
Commission applicable thereto;

                    (ii)   use commercially reasonable efforts to qualify the
Pledged Collateral under the state securities laws or "Blue Sky" laws and to
obtain all necessary governmental approvals for the sale of the Pledged
Collateral, as requested by Agent;

                    (iii)  use commercially reasonably efforts to cause the
Issuers to make available to their respective security holders, as soon as
practicable, an earnings statement which will satisfy the provisions of Section
11(a) of the Securities Act;

                    (iv)   execute and deliver, or use commercially reasonably
efforts to cause the officers and directors of the Issuers to execute and
deliver, to any person, entity or governmental authority as Agent may choose,
any and all documents and writings which, in Agent's reasonable judgment, may be
necessary or appropriate for approval, or be required by, any regulatory
authority located in any city, county, state or country where Pledgor or the
Issuers engage in business, in order to transfer or to more effectively transfer
the Pledged Interests or otherwise enforce Agent's rights hereunder; and

                    (v)    do or cause to be done all such other acts and things
as may be commercially reasonable to make such sale of the Pledged Collateral or
any part thereof valid and binding and in compliance with applicable law.

                                      -11-

<PAGE>

Pledgor acknowledges that there is no adequate remedy at law for failure by it
to comply with the provisions of this Section and that such failure would not be
adequately compensable in damages, and therefore agrees that its agreements
contained in this Section may be specifically enforced.

          (e)  PLEDGOR EXPRESSLY WAIVES TO THE MAXIMUM EXTENT PERMITTED BY LAW:
(i) ANY CONSTITUTIONAL OR OTHER RIGHT TO A JUDICIAL HEARING PRIOR TO THE TIME
AGENT DISPOSES OF ALL OR ANY PART OF THE PLEDGED COLLATERAL AS PROVIDED IN THIS
SECTION; (ii) ALL RIGHTS OF REDEMPTION, STAY, OR APPRAISAL THAT IT NOW HAS OR
MAY AT ANY TIME IN THE FUTURE HAVE UNDER ANY RULE OF LAW OR STATUTE NOW EXISTING
OR HEREAFTER ENACTED; AND (iii) EXCEPT AS SET FORTH IN SUBSECTION (a) OF THIS
SECTION, ANY REQUIREMENT OF NOTICE, DEMAND, OR ADVERTISEMENT FOR SALE.

          10.  Application of Proceeds. Upon the occurrence and during the
continuance of an Event of Default, any cash held by Agent as Pledged Collateral
and all cash proceeds received by Agent in respect of any sale of, collection
from, or other realization upon all or any part of the Pledged Collateral
pursuant to the exercise by Agent of its remedies as a secured creditor as
provided in Section 9 shall be applied from time to time by Agent as provided in
the Loan Agreement.

          11.  Duties of Agent. The powers conferred on Agent hereunder are
solely to protect its interests in the Pledged Collateral and shall not impose
on it any duty to exercise such powers. Except as provided in Section 9207 of
the Code, Agent shall have no duty with respect to the Pledged Collateral or any
responsibility for taking any necessary steps to preserve rights against any
Persons with respect to any Pledged Collateral.

          12.  Choice of Law and Venue. THE VALIDITY OF THIS AGREEMENT, ITS
CONSTRUCTION, INTERPRETATION, AND ENFORCEMENT, AND THE RIGHTS OF THE PARTIES
HERETO SHALL BE DETERMINED UNDER, GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH
THE LAWS OF THE STATE OF CALIFORNIA. THE PARTIES AGREE THAT ALL ACTIONS OR
PROCEEDINGS ARISING IN CONNECTION WITH THIS AGREEMENT SHALL BE TRIED AND
LITIGATED ONLY IN THE STATE AND FEDERAL COURTS LOCATED IN THE COUNTY OF LOS
ANGELES, STATE OF CALIFORNIA OR, AT THE SOLE OPTION OF AGENT, IN ANY OTHER COURT
IN WHICH AGENT SHALL INITIATE LEGAL OR EQUITABLE PROCEEDINGS AND WHICH HAS
SUBJECT MATTER JURISDICTION OVER THE MATTER IN CONTROVERSY. PLEDGOR AND AGENT
WAIVE, TO THE EXTENT PERMITTED UNDER APPLICABLE LAW, ANY RIGHT EACH MAY HAVE TO
ASSERT THE DOCTRINE OF FORUM NON CONVENIENS OR TO OBJECT TO VENUE TO THE EXTENT
ANY PROCEEDING IS BROUGHT IN ACCORDANCE WITH THIS SECTION 12.

          13.  Amendments; Etc. No amendment or waiver of any provision of this
Agreement nor consent to any departure by Pledgor herefrom shall in any event be
effective unless the same shall be in writing and signed by Agent and Pledgor,
and then such waiver or consent shall be effective only in the specific instance
and for the specific purpose for which

                                      -12-

<PAGE>

given. No failure on the part of Agent to exercise, and no delay in exercising
any right under this Agreement, any other Loan Document, or otherwise with
respect to any of the Secured Obligations, shall operate as a waiver thereof;
nor shall any single or partial exercise of any right under this Agreement, any
other Loan Document, or otherwise with respect to any of the Secured Obligations
preclude any other or further exercise thereof or the exercise of any other
right. The remedies provided for in this Agreement or otherwise with respect to
any of the Secured Obligations are cumulative and not exclusive of any remedies
provided by law. Notwithstanding the foregoing, Pledgor may amend Schedule A to
include Subsidiaries formed or acquired as permitted by Section 6.15 of the Loan
Agreement by providing a copy thereof to Agent along with a notice complying
with the applicable provisions herein with respect thereto.

          14.  Notices. Unless otherwise specifically provided herein, any
notice or other communication herein required or permitted to be given shall be
in writing and shall be delivered in the manner set forth in the Loan Agreement.

          15.  Continuing Security Interest. This Agreement shall create a
continuing security interest in the Pledged Collateral and shall: (i) remain in
full force and effect until the indefeasible payment in full of the Secured
Obligations, including the cash collateralization, expiration, or cancellation
of all Secured Obligations, if any, consisting of letters of credit, and the
full and final termination of any commitment to extend any financial
accommodations under the Loan Agreement; (ii) be binding upon Pledgor and its
successors and assigns; and (iii) inure to the benefit of Agent and its
successors, transferees, and assigns. Upon the indefeasible payment in full of
the Secured Obligations, including the cash collateralization, expiration, or
cancellation of all Secured Obligations, if any, consisting of letters of
credit, and the full and final termination of any commitment to extend any
financial accommodations under the Loan Agreement, the security interests
granted herein shall automatically terminate and all rights to the Pledged
Collateral shall revert to Pledgor. Upon any such termination, Agent will, at
Pledgor's expense, execute and deliver to Pledgor such documents as Pledgor
shall reasonably request to evidence such termination. Such documents shall be
prepared by Pledgor.

          16.  Security Interest Absolute. To the maximum extent permitted by
law, all rights of Agent, all security interests hereunder, and all obligations
of Pledgor hereunder, shall be absolute and unconditional irrespective of:

          (a)  any lack of validity or enforceability of any of the Secured
Obligations or any other agreement or instrument relating thereto, including any
of the Loan Documents;

          (b)  any change in the time, manner, or place of payment of, or in any
other term of, all or any of the Secured Obligations, or any other amendment or
waiver of or any consent to any departure from any of the Loan Documents, or any
other agreement or instrument relating thereto;

          (c)  any exchange, release, or non-perfection of any other collateral,
or any release or amendment or waiver of or consent to departure from any
guaranty for all or any of the Secured Obligations; or

                                      -13-

<PAGE>

          (d)  any other circumstances that might otherwise constitute a defense
available to, or a discharge of, Pledgor.

To the maximum extent permitted by law, Pledgor hereby waives any right to
require Agent to: (A) proceed against or exhaust any security held by Pledgor;
or (B) pursue any other remedy in Agent's power whatsoever.

          17.  Headings. Section and subsection headings in this Agreement are
included herein for convenience of reference only and shall not constitute a
part of this Agreement or be given any substantive effect.

          18.  Severability. In case any provision in or obligation under this
Agreement shall be invalid, illegal or unenforceable in any jurisdiction, the
validity, legality and enforceability of the remaining provisions or
obligations, or of such provision or obligation in any other jurisdiction, shall
not in any way be affected or impaired thereby.

          19.  Counterparts; Telefacsimile Execution. This Agreement may be
executed in one or more counterparts, each of which shall be deemed an original
and all of which together shall constitute one and the same Agreement. Delivery
of an executed counterpart of this Agreement by telefacsimile shall be equally
as effective as delivery of an original executed counterpart of this Agreement.
Any party delivering an executed counterpart of this Agreement by telefacsimile
also shall deliver an original executed counterpart of this Agreement but the
failure to deliver an original executed counterpart shall not affect the
validity, enforceability, or binding effect hereof.

          20.  Waiver of Marshaling. Pledgor and Agent acknowledge and agree
that in exercising any rights under or with respect to the Pledged Collateral:
(i) Agent is under no obligation to marshal any Pledged Collateral; (ii) may, in
its absolute discretion, realize upon the Pledged Collateral in any order and in
any manner it so elects; and (iii) may, in its absolute discretion, apply the
proceeds of any or all of the Pledged Collateral to the Secured Obligations in
any order and in any manner it so elects. Pledgor and Agent waive any right to
require the marshaling of any of the Pledged Collateral.

          21.  Waiver of Jury Trial. PLEDGOR AND AGENT HEREBY WAIVE THEIR
RESPECTIVE RIGHTS TO A JURY TRIAL OF ANY CLAIM OR CAUSE OF ACTION BASED UPON OR
ARISING OUT OF THIS AGREEMENT OR ANY OF THE TRANSACTIONS CONTEMPLATED HEREIN,
INCLUDING CONTRACT CLAIMS, TORT CLAIMS, BREACH OF DUTY CLAIMS, AND ALL OTHER
COMMON LAW OR STATUTORY CLAIMS. PLEDGOR AND AGENT REPRESENT THAT EACH HAS
REVIEWED THIS WAIVER AND EACH KNOWINGLY AND VOLUNTARILY WAIVES ITS JURY TRIAL
RIGHTS FOLLOWING CONSULTATION WITH LEGAL COUNSEL. IN THE EVENT OF LITIGATION, A
COPY OF THIS AGREEMENT MAY BE FILED AS A WRITTEN CONSENT TO A TRIAL BY THE
COURT.

                           [Signature page to follow.]

                                      -14-

<PAGE>

          IN WITNESS WHEREOF, Pledgor and Agent have caused this Agreement to be
duly executed and delivered as of the date first written above.

                                        HUDSON RESPIRATORY CARE INC.,
                                        a California corporation


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


                                        IH HOLDING LLC,
                                        a Delaware limited liability company


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


                                        MW POST ADVISORY GROUP, LLC,
                                        a Delaware limited liability company,
                                        as Agent


                                        By:
                                           -------------------------------------
                                        Name: Lawrence Post
                                        Title: Chief Executive Officer


                                                                  Signature Page
                                               Stock Pledge Agreement (Borrower)

<PAGE>

                                   SCHEDULE A
                                   ----------
                                       TO
                             STOCK PLEDGE AGREEMENT
                             ----------------------

                      Pledgor: Hudson Respiratory Care Inc.

                                Pledged Interests
                                -----------------

<TABLE>
<CAPTION>
                              Number                              Pledgor's                 Jurisdication
                               of                   Certificate   Percentage   Percentage       of          Certificated /
          Issuer              Shares     Class       Number(s)    Ownership     Pledged     Organization    Uncertificated
---------------------------  -------   ----------   -----------   ----------   ----------   -------------   --------------
<S>                           <C>      <C>          <C>           <C>          <C>          <C>             <C>
HRC Holding Inc.                 100    Common                1          100%         100%     Delaware      Certificated
IH Holding LLC                   n/a   membership            --          100%           0      Delaware     Uncertificated
                                       interests
Industrias Hudson, S.A. de
C.V.                             990     Common          16, 17           99%      66-2/3%     Mexico        Certificated
Hudson Respiratory Care
Tecate, S.de R.L. de C.V.        n/a   membership             1         99.9%      66-2/3%     Mexico        Certificated
                                       interests
</TABLE>
                             Pledgor: IH Holding LLC

                                Pledged Interests
                                -----------------

<TABLE>
<CAPTION>
                              Number                              Pledgor's                 Jurisdication
                               of                   Certificate   Percentage   Percentage       of          Certificated /
          Issuer              Shares     Class       Number(s)    Ownership     Pledged     Organization    Uncertificated
---------------------------  -------   ----------   -----------   ----------   ----------   -------------   --------------
<S>                           <C>      <C>          <C>           <C>          <C>          <C>             <C>
Industrias Hudson, S.A.
de C.V.                           10    Common               18            1%           0       Mexico       Certificated
Hudson Respiratory Care
Tecate, S. de R.L. de C.V.       n/a   membership             2          0.1%           0       Mexico       Certificated
                                       interests
</TABLE>

                                       -1-

<PAGE>

                                   SCHEDULE B
                                   ----------
                                       TO
                             STOCK PLEDGE AGREEMENT
                             ----------------------

                      Pledgor:Hudson Respiratory Care Inc.

                       Address of Chief Executive Office:

                       27711 Diaz Road
                       Temecula, California 92590

                                       -1-