RECITALS:

                    AMENDMENT NO. 2 TO STOCK AWARD AGREEMENT

     This Amendment No. 2 ("Amendment") to Stock Award Agreement ("Agreement")
dated October 31, 1990, by and between Oxboro Medical International, Inc., a
Minnesota corporation (the "Company"), and Xxxxx X. Xxxxxxxxx ("Xxxxxxxxx"),
effective the 31st day of October, 1995.


                                    RECITALS:


     WHEREAS, pursuant to the Agreement, the term of the Agreement expires at
midnight, October 31, 1995; and

     WHEREAS, the Company and Xxxxxxxxx desire to extend the termination date of
said Agreement to midnight, October 31, 1998 on the terms and conditions set
forth below;

     NOW, THEREFORE, in consideration of the foregoing and the mutual promises
and conditions contained in this Amendment, the parties hereto agree to make the
following amendments to the Agreement:

         1.       Consideration. In consideration of the Company agreeing to
                  extend the termination date of the Agreement from midnight
                  October 31, 1995 to October 31, 1998, Xxxxxxxxx, on his own
                  behalf and on behalf of Lexten, Inc. a Minnesota corporation,
                  of which Xxxxxxxxx is the sole shareholder, officer and
                  director, the general partner of the Project Heart Limited
                  Partnership, hereby waives right to receive any cash
                  distribution from said limited partnership, with the intent
                  and understanding that all distributions by said limited
                  partnership shall be made proportionately as if the remaining
                  limited partners were the only limited partners.

         2.       Term of Agreement.  The  termination  date of this  Agreement 
                  is hereby  extended from  midnight, October 31, 1995 to
                  midnight, October 31, 1998.

     All other provisions of the Stock Award Agreement, subject to the
provisions of Amendment No. 1 and this Amendment No. 2, shall remain in full
force and effect.


     IN WITNESS WHEREOF, the parties hereto have executed this Amendment as of
October 31st, 1995.

                                              OXBORO MEDICAL INTERNATIONAL, INC.


                                                     By /s/ Xxxxxx Xxxxx
                                                        Xxxxxx Xxxxx
                                                        Its   President


                                                        /s/ Xxxxx X. Xxxxxxxxx
                                                        Xxxxx X. Xxxxxxxxx,
                                                        Individually


Consented and agreed to
this 31st day of October,
1995 by:


LEXTEN, INC.


By: /s/ Xxxxx X. Xxxxxxxxx
    Xxxxx X. Xxxxxxxxx
    Its President