EXHIBIT 3.4

                                  REGULATIONS

                                      OF

                  AMARILLO ACUTE DIALYSIS SPECIALISTS, L.L.C.

                                   ARTICLE I

                           OFFICES AND COMPANY SEAL
                           ------------------------

     1.   PRINCIPAL OFFICE. The principal office of the Company shall be located
          ----------------
at 7205 I-40 West, Suites A, B and C, Amarillo, Texas.

     2.   OTHER OFFICES. The Company may also maintain offices at such other 
          -------------
place or places, within the State of Texas, as may be designated from time to
time by the Members, and the business of the Company may be transacted at such
other offices with the same effect as that conducted at the principal office.

     3.   COMPANY SEAL. A company seal shall not be requisite to the validity of
          ------------
any instrument executed by or on behalf of the Company, but may be used.


                                  ARTICLE II

                             FISCAL YEAR AND TERM
                             --------------------

     1.   FISCAL YEAR. The fiscal year of the Company shall begin on the first 
          -----------
day of January and end on the last day of December.

     2.   TERM OF COMPANY. The Company shall commence its existence upon the 
          ---------------
date the Articles of Organization are filed with the Texas Secretary of State 
and shall continue until December 31, 2025, unless sooner dissolved pursuant to 
Article X.

     3.   INTENT. It is the intent of the Members that the Company shall always 
          ------
be operated in a manner consistent with its treatment as a "partnership" for 
federal and state income tax purposes. However, it is the intent of the Members 
that the Company not be operated or treated as a "partnership" for purposes of 
Section 303 of the Federal Bankruptcy Code. No Member shall take any action 
inconsistent with the express intent of the parties hereto.



 
                                  ARTICLE III

                                    MEMBERS
                                    -------

     1.   MEMBERS' MEETINGS. The business of the Company shall be managed by the
          -----------------
Members. All meetings of the Members shall be held at such place as may be fixed
from time to time by the Members, or by the President or Secretary of the 
Company, either within or without the State of Texas, as shall be stated in the 
notice of the meeting or in a duly executed waiver of notice thereof.

     2.   ANNUAL MEETINGS. Annual meetings of Members shall be held on the 1st 
          ---------------
Wednesday in March if not a legal holiday, and if a legal holiday, then on the 
next secular day following, or at such other date and time as shall be 
designated from time to time by the Members and stated in the notice of the 
meeting. At the annual meeting, Members shall elect officers and transact such 
other business as may properly be brought before the meeting.

     3.   NOTICE OF ANNUAL MEETING. Written notice of the annual meeting stating
          ------------------------
the place, date and hour of the meeting shall be given to each Member of record 
entitled to vote at such meeting not less than ten (10) nor more than sixty (60)
days before the date of the meeting. If mailed, such notice shall be deemed to 
be delivered when deposited in the United States mail, addressed to the Member 
at its address as it appears on the records of the Company with postage thereon 
paid. When a meeting is adjourned to another time or place, notice need not be 
given of the adjourned meeting if the time and place thereof are announced at 
the meeting at which the adjournment is taken.

     4.   FIXING OF RECORD DATE. For the purpose of determining the Members 
          ---------------------
entitled to notice of or to vote at any meeting of Members, the date fixed for 
the payment of any dividend or distribution, the date of allotment of rights 
or the date for participation in the execution of written consents, waivers or 
releases, the Company may fix in advance a record date which shall not be more 
than sixty (60) days. If no record date is fixed, the record date for the 
determination of Members entitled to notice of or to vote at a meeting of 
Members shall be the date next preceding the day on which notice is given or the
date next preceding the day on which the meeting is held if no notice is 
required and the record date for the determination of Members for any other 
purpose shall be the date on which the board of directors adopts the resolution 
relating thereto. A determination of Members of record entitled to notice of or 
to vote at a meeting of Members shall apply to any adjournment of the meeting.

     5.   VOTING LISTS. The officer or agent having charge of the transfer books
          ------------
for shares of the Company shall make at least five (5) days before meeting of 
Members, a complete list of the Members entitled to vote at such meeting, 
arranged in alphabetical order, showing the address of and the number of shares 
registered in the name of the Member, which list shall be kept on file at the 
registered office of the Company and shall be open to

                                      -2-


 
inspection by any Member and subject to copying at the Member's expense at any 
time during usual business hours. Such list shall also be produced and kept open
at the time and place of the meeting and may be inspected by any Member during 
the whole time of the meeting. The original share ledger or transfer book, or a 
duplicate thereof kept this state, shall be prima facie evidence as to who are 
the Members entitled to examine such list or share ledger or transfer book or to
vote any meeting of Members.

     6.   SPECIAL MEETINGS OF MEMBERS. Special meetings of the Members, for any 
          ---------------------------
purpose or purposes, unless otherwise proscribed by statute or by the Articles 
of Organization, may be called by the President or Secretary at the request in 
writing or Members owning a majority in amount of the membership interests of
the Company issued, outstanding, and entitled to vote. Such request shall state
the purpose or purposes of the proposed meeting.

     7.   NOTICE OF SPECIAL MEETINGS. Written notice of a special meeting 
          --------------------------
stating the place, date, and hour of the meeting and the purpose or purposes for
which the meeting is called shall be given not less than ten (10) nor more than 
fifty (50) days before the date of the meeting to each Member of record entitled
to vote at such meeting.

     8.   QUORUM AND ADJOURNMENT. The holders of a majority of the shares 
          ----------------------
issued, outstanding, and entitled to vote at the meeting, present in person or 
represented by proxy, shall constitute a quorum at all meetings of the Members 
for the transaction of business except as otherwise provided by statute or by 
the Articles of Organization. If, however, such quorum shall not be present or 
represented at any meeting of the Members, the Members entitled to vote at the 
meeting, present in person or represented by proxy, shall have power to adjourn 
the meeting to another time or place, without notice other than announcement at 
the meeting at which adjournment is taken, until a quorum shall be present or 
represented. At such adjourned meeting at which a quorum shall be present or 
represented, any business may be transacted which might have been transacted at 
the meeting as originally notified. If the adjournment is for more than thirty 
(30) days, or if after the adjournment a new record date is fixed for the 
adjourned meeting, a notice of the adjourned meeting shall be given to each 
Member of record entitled to vote at the meeting.

     9.   MAJORITY REQUIRED. When a quorum is present at any meeting, the vote 
          -----------------
of the holders of a majority of the voting power present, whether in person or 
represented by proxy, shall decide any question brought before such meeting, 
unless the question is one upon which, by express provision of the statutes, the
Articles of Organization or these Regulations, a different vote is required, in 
which case such express provision shall govern and control the decision of such 
question.

     10.  VOTING. At every meeting of the Members, each Member shall be entitled
          ------
to one vote in person or by proxy for each share of the capital stock having 
voting power held by such Member, but no proxy shall be voted or acted upon 
after eleven (11) months from its date, unless the proxy provides for a longer 
period.

                                      -3-


 
     11.  ACTION WITHOUT MEETING. Any action required or permitted to be taken 
          ----------------------
at any annual or special meeting of Members may be taken without a meeting, 
without prior notice, and without a vote, if a consent in writing, setting forth
the action so taken, shall be signed by the holders of all of the outstanding 
Membership Interests entitled to vote with respect to the subject matter of the 
action.

     12.  WAIVER OF NOTICE. Attendance of a Member at a meeting shall constitute
          ----------------
waiver of notice of such meeting, except when such attendance at the meeting is 
for the express purpose of objecting to the transaction of any business because 
the meeting is not lawfully called or convened. Any Member may waive notice of 
any annual or special meeting of Members by executing a written waiver of notice
either before or after the time of the meeting.

                                  ARTICLE IV

                  CAPITAL CONTRIBUTIONS AND CAPITAL ACCOUNTS
                  ------------------------------------------

     1.   INITIAL CAPITAL CONTRIBUTIONS OF MEMBERS; AUTHORIZED AND ISSUED 
          ---------------------------------------------------------------
MEMBERSHIP INTERESTS.
- --------------------

          Upon execution of this Agreement, each Member shall be credited with a
contribution to the capital of the Company in the amounts set forth opposite 
their respective names under the heading "Initial Capital Contribution" on 
attached Exhibit A (the "Initial Capital Contributions"). Each Member shall 
contribute such Initial Capital Contribution in cash or other property as 
described on attached Exhibit A, concurrently with the execution of the 
Regulation. Initial Capital Contributions shall not include any amounts 
representing loans, other indebtedness or guarantees made by a Member to the 
Company pursuant to Section 4.2 or Section 4.3 hereof. The Company shall issue 
up to 100 Membership Interests. The Company shall not authorize or issue 
additional Membership Interests without the unanimous written consent of the 
Members, which consent may be withheld for any reason or no reason at each 
Member's sole discretion. Except as otherwise specifically set forth herein, the
Members shall not be obligated in any manner or to any extent whatsoever to 
contribute any additional capital to the Company.

     2.   ADDITIONAL CAPITAL CONTRIBUTIONS. The Company's additional capital 
          --------------------------------
requirements in excess of the Members' Initial Capital Contributions may be met 
by (i) requests for additional capital contributions from the Members in 
proportion to each Member's relative Membership percentage in the Company 
("Additional Capital Contributions"); provided that no Member shall be required 
to make any such Additional Capital Contributions without such Member's prior 
written consent, which consent may be granted or withheld for any reason or no 
reason whatsoever; or (ii) loans to the Company from any third party lending 
institution or from any Member or affiliate of a Member on such terms as the 
Members and the lending Member agree; provided, however, all Members not a party
to the loan transaction must approve the loan and its terms. All such loans 
shall

                                      -4-


 
be evidenced by a promissory note. Nothing contained herein shall require any 
Member to loan any funds to the Company.

     3.   CAPITAL ACCOUNTS. A Capital Account shall be established and 
          ----------------
maintained by the Company for each Member.

          (a)       In general, each Member's Capital Account shall be increased
                    by:

               (i)  the amount of money contributed by the Member:

              (ii)  the fair market value of property contributed by the Member
                    (net of liabilities secured by the property that the
                    Company is considered to assume or take subject to); and

             (iii)  allocations of net profits to such Member.

          (b)       In general, each Member's Capital Account shall be decreased
                    by:

               (i)  the amount of money distributed to such Member;

              (ii)  the fair market value of property distributed to such Member
                    (net of liabilities secured by the distributed property that
                    the Member assumes or takes subject to); and

             (iii)  allocations of net losses to such member.

     4.   LIMITATIONS PERTAINING TO CAPITAL CONTRIBUTIONS.
          -----------------------------------------------

          (a)  Except as otherwise provided in these Regulations, no Member
shall be entitled or permitted to demand, withdraw or receive the return of that
Member's Capital Contributions (or any part thereof) or any money or other
property from the Company without the unanimous written consent of the Members.
In the event a Member is to receive a return of any Capital Contribution, no
Member shall have the right to receive property in a form other than cash,
unless otherwise specifically agreed in writing by all Members at the time of
such distribution or at the time of the contribution of such property.

          (b)  No Member shall receive any interest with respect to such
Member's Capital Contributions or Capital Account.

          (c)  The Members shall not be liable for the debts, liabilities,
contracts or any other obligations of the Company (except to the extent
specifically assumed by such Member) beyond their Capital Contributions to the
Company. No Member of the Company shall have any personal liability for the 
repayment of the Capital Contributions of any other Member.

                                      -5-


 
                                   ARTICLE V

                         DISTRIBUTIONS AND ALLOCATIONS
                         -----------------------------

     1.   DETERMINATION OF COMPANY PROFITS AND LOSSES. The income, gains, 
          -------------------------------------------
losses, deductions and credits of the Company shall be determined for each 
fiscal year in accordance with the accounting method followed by the Company for
federal income tax purposes and otherwise in accordance with generally accepted 
accounting principles consistently applied.

     2.   DISTRIBUTIONS. Except as otherwise provided herein, distributions to 
          -------------
the Members may be authorized by the Members from time to time in their sole 
discretion. Any such distributions shall be made on such dates designated by the
Members, shall be made in proportion to the Membership percentages at the time 
of the distribution; provided that to the extent any distributions relate to 
periods in which a Member did not hold all or any portion of such Member's 
Membership Interests for the entire period, such distributions shall be adjusted
by the Members to take into account the actual period the Member owned such 
Membership Interests.

     3.   ALLOCATION OF PROFITS AND LOSSES. The income, gains, losses, 
          --------------------------------
deductions, credits and any other items of the Company, including those items 
not recognized in computing taxable income for income tax purposes, shall be 
allocated to the Members based on Membership percentages.

     4.   SPECIAL ALLOCATIONS. Notwithstanding Section 3 above:
          -------------------

          (a)  No allocations of loss, deduction and/or expenditures described
     in Code Section 705(a)(2)(B) shall be made to a Member if such allocation
     would cause or increase a deficit balance in such Member's Capital Account.
     Any items that would be allocated to a Member but for the limitations
     contained in this Section shall be allocated to the other Members in
     accordance with their interests in Company profits pursuant to Section 3
     above.

          (b)  In the event any Member unexpectedly receives any adjustments,
     allocations, or distributions described in Sections 1.704-
     1(b)(2)(ii)(d)(4), (5), or (6) of the Treasury Regulations, which create or
     increase a deficit balance in such Member's Capital Account, then items of
     Company income and gain (consisting of a pro rata portion of each item of
     Company income, and gain for such year and, if necessary, for subsequent
     years) shall be specially credited to the Capital Account of such Member in
     an amount and manner sufficient to eliminate, to the extent required by the
     Treasury Regulations, the deficit Capital Account so created as quickly as
     possible. It is the intent that this 4(b) be interpreted to comply with the
     alternate test for economic effect set forth in Section 1.704-
     1(b)(2)(ii)(d) of the Treasury Regulations.

                                      -6-

 
          (c)  Notwithstanding any other provision of this Section 4, if there
     is a net decrease in the Company's minimum gain as defined in Treasury
     Regulation Section 1.704-2(d) during a taxable year of the Company, then,
     the Capital Account of each Member shall be allocated items of income
     (including gross income) and gain for such year (and if necessary for
     subsequent years) equal to that Member's share of the net decrease in
     Company minimum gain. This Section 4(c) is intended to comply with the
     minimum gain chargeback requirement of Section 1.704-2 of the Treasury
     Regulations and shall be interpreted consistently therewith.

          (d)  Items of Company loss, deduction and expenditures described in
     Code Section 705(a)(2)(B) which are attributable to any nonrecourse debt of
     the Company and are characterized as partner (Member) nonrecourse
     deductions under Section 1.704-29(i) of the Treasury Regulations shall be
     allocated to the Members' Capital Accounts in accordance with Section 
     1.704-2(i) of the Treasury Regulations.

          (e)  The income, gains, losses, deductions and credits of the Company
     are allocable to a Member only if they are earned, paid or incurred by the
     Company during the portion of the fiscal year that such Member is a Member
     of the Company.

          (f)  The allocations set forth in Sections 4(a) through (d) hereof
     (the "Regulatory Allocations") are intended to comply with certain
     requirements of the Treasury Regulations Section 1.704-1.(b).
     Notwithstanding any other provisions of this Article IV (other than the
     Regulatory Allocations), the Regulatory Allocations shall be taken into
     account in allocating other profits, losses, and other items of income,
     gain, loss and deduction among the Members so that, to the extent possible,
     the net amount of such allocations of other profits, losses and other items
     and the Regulatory Allocations to each Member shall be equal to the net
     amount that would have been allocated to each such Member if the Regulatory
     Allocations had not occurred.

     5.   TAX MATTERS PARTNER. Home Dialysis of America, Inc. is designated the 
          -------------------
"Tax Matters Partner" (as defined in Code Section 6231), and is authorized and 
required to represent the Company in connection with all examinations of the 
Company's affairs by tax authorities, including, without limitation, 
administrative and judicial proceedings, and is authorized to expend Company 
funds for professional services and costs associated therewith to the extent 
such expenditures are approved in advance in writing by the Members.

                                      -7-







 
                                  ARTICLE VI

                                   OFFICERS
                                   --------

     1.   DESIGNATION OF TITLES. The officers of the Company shall be chosen by 
          ---------------------
the Members and shall be a President, a Vice President, a Secretary, and a 
Treasurer. The Members may also choose additional Vice Presidents, and one or 
more Assistant Secretaries and Assistant Treasurers or other officers as the 
Members deem necessary. Any number of offices, except the offices of President 
and Secretary, may be held by the same person, unless the Articles of 
Organization or these Regulations otherwise provide.

     2.   APPOINTMENT OF OFFICERS. The Members at their first meeting shall 
          -----------------------
choose a President, one or more Vice Presidents, a Secretary and a Treasurer, 
each of whom shall serve at the pleasure of the Members. The President and 
Secretary shall be different persons. The Members at any time may appoint such 
other officers and agents as it shall deem necessary to hold offices at the 
pleasure of the Members and to exercise sum and perform such duties as shall be 
determined from time to time by the Board.

     3.   SALARIES. The salaries of the officers shall be fixed from time to 
          --------
time by the Members, and no officer shall be prevented from receiving such 
salary by reason of the fact that he is also a director of the Company. The 
salaries of the officers or the rate by which salaries are fixed shall be set 
forth in the minutes of the meetings of the Members.

     4.   VACANCIES. A vacancy in any office because of death, resignation, 
          ---------
removal, disqualification or otherwise may be filled by the Members at any time.

     6.   PRESIDENT. The President shall preside at all meetings of Members. He 
          ---------
or she shall sign all deeds and conveyances, all contracts and agreements, and 
all other instruments requiring execution on behalf of the Company, and shall 
act as operating and directing head of the Company, subject to policies 
established by the Members.

     7.   VICE PRESIDENT. There shall be as many Vice Presidents as shall be 
          --------------
determined by the Members from time to time, and they shall perform such duties 
as from time to time may be assigned to them. Any one of the Vice Presidents, as
authorized by the Members, shall have all the powers and perform all the duties 
of the President in case of the temporary absence of the President or in case of
his or her temporary inability to act. In case of the permanent absence or 
inability of the President to act, the office shall be declared vacant by the 
Members and a successor chosen by the Members.

     8.   SECRETARY. The Secretary shall see that the minutes of all meetings of
          ---------
Members, and of any standing committees are kept. He or she shall be the 
custodian of the company seal and shall affix it to all proper instruments when 
deemed advisable by him or her. He or she shall give or cause to be given 
required notices of all meetings of the Members. He or she shall have charge of 
all the books and records of the Company except

                                      -8-

 
the books of account, and in general shall perform all the duties incident to 
the office of Secretary of a Company and such other duties as may be assigned to
him or her.

     9.   TREASURER. The Treasurer shall have general custody of all the funds 
          ---------
and securities of the Company except such as may be required by law to be 
deposited with any state official. He or she shall see to the deposit of the 
funds of the Company in such bank or banks as the Members may designate. Regular
books of account shall be kept under his or her direction and supervision, and 
he or she shall render financial statements to the President and Members at 
proper times. The Treasurer shall have charge of the preparation and filing of 
such reports, financial statements, and returns as may be required by law. He 
or she shall give to the Company such fidelity bond as may be required, and the 
premium therefor shall be paid by the Company as an operating expense.

     10.  ASSISTANT SECRETARIES. There may be such number of Assistant 
          ---------------------
Secretaries as from time to time the Members may fix, and such persons shall 
perform such functions as from time to time may be assigned to them. No 
Assistant Secretary shall have the power or authority to collect, account for, 
or pay over any tax imposed by any federal, state or city government.

     11.  ASSISTANT TREASURERS. There may be such number of Assistant Treasurers
          --------------------
as from time to time the Members may fix, and such persons shall perform such 
functions as from time to time may be assigned to them. No Assistant Treasurer 
shall have the power or authority to collect, account for, or pay over any tax 
imposed by any federal, state or city government.

     12.  REMOVAL. Any officer elected or appointed by the Members may be 
          -------
removed by he Members whenever in its judgement the best interests of the 
Company would be served thereby, but such removal shall be without prejudice to 
the contract rights, if any, of the person so removed. Election of an officer 
shall not of itself create contract rights.


                                  ARTICLE VII

                                   LIABILITY
                                   ---------

     No officer or Member shall be personally liable to the Company or to its 
Members except to the extent that such limitation of liability is prohibited by 
the provisions of Texas law, and except for liability resulting from (a) any 
breach of the officers or Members duty of loyalty to the Company or to its 
Members; (b) acts or omissions which are not in good faith or which involve 
intentional misconduct or a knowing violation of law; (c) any transaction from 
which the officer or Member derived an improper personal benefit; and (d) 
authorizing the unlawful payment of a dividend or other distribution on the 
Company's Membership Interest, or the unlawful purchase of its Membership 
Interest.

                                      -9-

 
 
                                 ARTICLE VIII

                                INDEMNIFICATION
                                ---------------

     1.   POWER TO INDEMNIFY. The Company may indemnify a Member, officer, 
          ------------------
employee or agent who was or is a party or is threatened to be made a party to 
any threatened, pending or completed action, suit or proceeding, whether civil, 
criminal, administrative, or investigative, if he or she acted, or failed to 
act, in good faith and in a manner he or she reasonably believed and, with 
respect to any criminal action or proceeding, had no reasonable cause to believe
his or her conduct was unlawful. In an action not by or in the right of the 
Company, such indemnification may include expenses, attorney fees, judgments, 
fines and amounts paid in settlement actually and reasonably incurred. In an 
action by or in the right of the Company, such indemnification may include 
expenses, attorney fees and amounts paid in settlement actually and reasonable 
incurred, but shall not include judgments and fines.

     2.   LIMITS ON INDEMNIFICATION. No person shall be indemnified if he or she
          -------------------------
has been adjudged to be liable to the Company, unless otherwise ordered by the 
court. The Company may refuse indemnification to any person who unreasonably 
refuses to permit the Company, at its own expense and through counsel of its own
choosing, to defend him or her in the action.

     3.   DECISION-MAKING. A decision to indemnify a person shall be made by one
          ---------------
of the following: a majority vote of a quorum consisting of disinterested
Members; if such quorum is not obtainable, a written opinion of independent
legal counsel appointed by a majority of the disinterested Members; if there are
not disinterested Members, the court or other body before which the action was
brought, or any court of competent jurisdiction.


                                  ARTICLE IX

                        REPEAL, ALTERATION OR AMENDMENT
                        -------------------------------

     The Articles of Organization, and Regulations may be repealed, altered, or 
amended only by a unanimous vote of all issued and outstanding Membership 
Interests.


                                   ARTICLE X

                           RESTRICTION ON TRANSFERS
                           ------------------------

     1.   RESTRICTION ON TRANSFERS. No Member may sell, transfer, pledge, 
          ------------------------
hypothecate, gift or otherwise dispose of or encumber all or any portion of its 
Membership Interests without the prior unanimous written consent of the Members.

                                     -10-


 
     2.   ASSIGNEE OF A MEMBER'S MEMBERSHIP INTERESTS. If, notwithstanding the 
          -------------------------------------------
prohibitions in Article X, Section 1, a Member transfers all or any portion of 
its Membership Interests (whether voluntarily, involuntarily or by operation of 
law, including, but not limited to, the death, divorce, disability, or 
bankruptcy of a Member,) and a person acquires such Membership Interests, (but 
is not admitted as a substituted Member pursuant to the terms of this Agreement)
such person shall:

          (a)  be treated as an assignee of a Member's Membership Interests, as 
provided in the Texas Limited Liability Company Act ("Act");

          (b)  have no right to participate in the business and affairs of the 
Company or to exercise any rights of a Member under this Agreement or the Act; 
and

          (c)  share in distributions from the Company with respect to the 
transferred Membership Interests on the same basis as the transferring Member.

     3.   IRREPARABLE HARM. Each Member specifically acknowledges that a breach 
          ----------------
of Section 1 would cause the Company and the Members to suffer immediate and 
irreparable harm, which could not be remedied by the payment of money. In the 
event of a breach or threatened breach by a Member of the provisions of Section 
1, the Company or other Members shall be entitled to injunctive relief to 
prevent or end such breach, without the requirement to post bond. Nothing herein
shall be construed to prevent the Company or other Members from pursuing any 
other remedies available to it for such breach or such threatened breach, 
including the recovery of damages.

     4.   ADMISSION OF TRANSFEREES. A transferee may be admitted to the Company 
          ------------------------
as a substituted Member only with the prior unanimous written consent of the 
Members.

     5.   OBLIGATIONS OF PERMITTED TRANSFEREES. In the case of any approved 
          ------------------------------------
transfer or disposition of Membership Interests, the transferee shall execute 
and deliver an appropriate instrument agreeing to be bound by these Regulations 
as a Member and such additional agreements or instruments as the Members may 
require. Any permitted transferee of Membership Interests shall receive and hold
such Membership Interests subject to these Regulations and all the restrictions,
obligations and rights created hereunder, and the Members and each transferee 
shall be bound by their obligations under these Regulations with respect to each
subsequent transferee.

     6.   LEGEND. Each Certificate representing Membership Interests of the 
          ------
Company shall include the following legend:

          The Units of Membership Interest represented by this
          Certificate are: (1) subject to transfer restrictions in
          accordance with the terms of Regulations, a copy of which
          may be obtained without

                                -11- 

 
          charge by a Member on written request to the Company; and
          (2) have not been registered under the federal or any
          applicable state securities acts and cannot be transferred
          without an opinion of counsel satisfactory to the Company's
          legal counsel that such transfer will not violate any such
          securities laws.

                                  ARTICLE XI

                   DISSOLUTION, TERMINATION AND LIQUIDATION
                   ---------------------------------------- 

     1.   EVENTS CAUSING DISSOLUTION OF THE COMPANY.  The first to occur of the 
          -----------------------------------------
following events shall cause a dissolution of the Company:

          (a)  the consent of all the Members;

          (b)  the sale or other transfer of all or substantially all of the 
Company Property;

          (c)  The bankruptcy, legal incapacity or dissolution of a Member, or 
any other event that terminates a Member's membership in the Company (as 
provided herein), unless the remaining Members, within the ninety (90) day 
period following any such event, unanimously vote or consent to the continuation
of the Company.  In the event the Company is continued after any such event, the
right of the affected Member to share in the profits and losses of the Company, 
to receive distributions of Company funds and to assign its Membership Interests
shall, subject to the terms and conditions of this Agreement, devolve on its 
personal representative or successor, as the case may be, and the Company shall 
continue its existence.  Such personal representative or successor, as the case 
may be, shall be liable for all the obligations of the affected Member; 
provided, however, in no event shall such Person become a Member without the 
unanimous consent of Members; or

          (d)  expiration of the Company's term under Article II.

     2.   EFFECT OF DISSOLUTION.  If the Company is dissolved, the Company shall
          ---------------------     
be wound up and terminated in accordance with this Article XI.

     3.   FINAL ACCOUNTING.  Upon dissolution of the Company, an accounting 
          ----------------
shall be made of the accounts of each Member and of the Company property, 
liabilities and operations, from the date of the last previous accounting to the
date of such dissolution.

     4.   LIQUIDATION.  In the event of the dissolution of the Company, the 
          -----------
Members shall, in an orderly manner, commence to wind up the affairs of the 
Company and liquidate its property.

                                    - 12 -

 
     5.   DISTRIBUTION. Following the payment of all debts and liabilities of
          ------------
the Company (other than loans or advances that have been made by any of the
Members) and all expenses of liquidation, and subject to the right of the
Members to set up cash reserves as it may deem reasonably necessary for any
contingent or unforeseen liabilities or obligations of the Company, the proceeds
of the liquidation and any other funds of the Company shall be distributed in
the following order of priority:

          (a)  First, to the repayment of any loans or advances that may have 
been made by any of the Members to the Company, but if the amount available for 
repayment of such loans or advances shall be insufficient, then to the Members 
on account thereof in proportion to their respective advances; and 

          (b)  Then, after allocation of all income, profits, losses and 
deductions in accordance with Article V hereof and after adjustment to the 
Capital Accounts required by Treasury Regulation (S)1.704.1(b), to the Members 
in payment of the amount of their Capital Accounts, but if the amount available 
for such repayment shall be insufficient, then to the Members on account thereof
in proportion to their respective Capital Accounts.

     Each Member shall look solely to the Company property for all distributions
with respect to the Company and its Capital Contributions thereto and its share 
of income, gains, losses and deductions thereof, and shall have no recourse 
against any Members therefor. No Member shall have any rights to demand or 
receive property in a form other than cash upon distribution and liquidation of 
the Company, but the Members may, in their discretion, distribute property in a 
form other than cash to a Member.

     6.   TERMINATION. A reasonable time shall be allowed for the orderly 
          -----------
liquidation of the assets of the Company and the discharge of liabilities to 
creditors so as to enable the Members to minimize the normal losses attendant 
upon a liquidation. Each of the Members shall be furnished with a statement 
prepared by the Company's accountants, which shall set forth the property and 
liabilities of the Company as of the date of complete liquidation. Upon 
compliance with the distribution plan set forth herein, the Members shall cease 
to be such, and the Members shall execute, acknowledge and cause to be filed a 
Certificate of Dissolution of the Company. Upon completion of the dissolution, 
winding up, liquidation and distribution of the liquidation proceeds, the 
Company and this Agreement shall terminate.

                                     -13-

 
                           CERTIFICATE OF SECRETARY
                           ------------------------

     I hereby certify that the foregoing copy of the Regulations is a true and 
correct copy of the Regulations of the Company as the same were adopted at the 
first meeting of the Members.

                                          /s/ Thomas Creel
                                        ----------------------------------
                                          SECRETARY

                                     -14-

 
                                                                       EXHIBIT A
                                                                       ---------


                  MEMBERSHIP INTERESTS/MEMBERSHIP PERCENTAGES
                  -------------------------------------------


 
 
                                   Initial Capital   Membership    Membership
                                   ---------------   ----------    ----------
Name and Addresses of               Contribution     Interests     Percentage
- ---------------------               ------------     ---------     ---------- 
                                                                  
*   Home Dialysis of America, Inc.    $1,000.00          10           100%
    6300 East El Dorado Plaza
    Tucson, AZ 85715
 


*   Initial Members were Thomas Creel and Martin Fox, who transferred their 
    shares to Home Dialysis of America, Inc.

                                     -15-