UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT
     Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

          Date of Report (Date of earliest event reported): May 5, 2005



                               THERMOGENESIS CORP.
             (Exact name of registrant as specified in its charter)



      Delaware                      0-16375                     94-3018487
      ---------                     --------                    ----------
  (State or other           (Commission File Number)         (I.R.S. Employer
  jurisdiction of                                           Identification No.)
 incorporation or
   organization)

                                2711 Citrus Road
                        Rancho Cordova, California 95742
                        --------------------------------
              (Address and telephone number of principal executive
                               offices) (Zip Code)

                                 (916) 858-5100
                                 --------------
              (Registrant's telephone number, including area code)

Checkthe   appropriate  box  below  if  the  Form  8-K  filing  is  intended  to
simultaneously  satisfy the filing obligation of the registrant under any of the
following provisions (see General Instruction A.2. below):

[ ] Written communications pursuant to Rule 425 under the Securities Act (17 CFR
    230.425)
[ ] Soliciting material pursuant to Rule 14a-12 under the Exchange Act
    (17 CFR 240.14a-12)
[ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange
    Act (17 CFR 240.14d-2(b))
[ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange
    Act (17 CFR 240.13e-4(c))


<PAGE>



Section 5 - Corporate Governance and Management
-----------------------------------------------

Item 5.02.  Departure of Directors, Principal Officers; Election of Directors;
            Appointment of Principal Officers

     (c). Change in Chief Financial Officer.
     ---------------------------------------

     ThermoGenesis  Corp.  (the  "Company")  announced today that Matthew Plavan
effective May 31, 2005,  will be the  Company's  next Chief  Financial  Officer.
Renee Ruecker, the Company's current Chief Financial Officer,  effective May 31,
2005, will become the Company's Director of SEC Reporting.

     Mr.  Matthew  Plavan,  age 41,  from 2002 to 2005 was the  Chief  Financial
Officer of Strionair, Inc., a manufacturer of air-purification  technology. From
2000 to 2002, he was the CFO for Reason, Inc., a venture-backed  wireless device
management  company  acquired in 2002 by InPhonic,  Inc. From 1993 to 2000,  Mr.
Plavan served in a number of senior  management  roles at McKesson Corp. and its
subsidiaries,  including Vice President of Finance for iMcKesson, a $300 million
eHealth division providing healthcare information solutions. Mr. Plavan was also
General  Manager  of Disease  State  Management,  Senior  Director  of  Investor
Relations and Corporate  Controller  with  McKesson.  Prior to joining  McKesson
Corp.,  Mr. Plavan,  from 1987 to 1993, was an Audit Manager with Ernst & Young,
LLP. Mr.  Plavan earned his  bachelor's  degree in business  economics  from the
University of California at Santa Barbara and is a Certified Public Accountant.

     The Company entered into a three year employment  agreement with Mr. Plavan
where Mr.  Plavan will be paid an annual  salary of  $175,000  subject to annual
increases as may be  determined  by the Board of  Directors.  Mr. Plavan will be
paid moving expenses not to exceed  $40,000.  Mr. Plavan will be granted a seven
year option to purchase  90,000  shares of common stock vesting over five years.
Mr.  Plavan is  eligible to receive  bonuses  based on his  performance  and the
attainment of objectives  established by the Company. Mr. Plavan's bonuses shall
not  exceed  35% of his base  salary in effect  for any given  year and shall be
subject to Compensation  Committee oversight for meeting stated objectives.  The
employment agreement may be terminated prior to the expiration of the agreement,
upon the mutual  agreement  of the  Company and Mr.  Plavan.  In  addition,  the
employment agreement provides that in the event Mr. Plavan is terminated without
cause, Mr. Plavan will be paid an amount equal to 6 months salary.

     Mr. Plavan has not held any positions with the Company previously and there
are no related party transactions between Mr. Plavan and the Company. Mr. Plavan
has no family relation with any director or officer of the Company.


<PAGE>


Section 9 - Financial Statements and Exhibits
---------------------------------------------

Item 9.01 Financial Statements and Exhibits
-------------------------------------------

         Exhibit No.                Exhibit Description
         -----------                -------------------
             10                     Employment Agreement with Matthew Plavan

             99                     Press Release titled "ThermoGenesis Corp.
                                    Retains Matthew Plavan, New Chief Financial
                                    Officer".






<PAGE>


                                    SIGNATURE

     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.


                                            THERMOGENESIS CORP.,
                                            a Delaware Corporation


Dated:  May 5, 2005                         /s/ Renee Ruecker
                                            -----------------------------------
                                            Renee Ruecker,
                                            Chief Financial Officer


<PAGE>


                                  EXHIBIT INDEX


         Exhibit No.                Description
         -----------                -----------
             10                     Employment Agreement with Matthew Plavan

             99                     Press Release titled "ThermoGenesis Corp.
                                    Retains Matthew Plavan, New Chief Financial
                                    Officer".
[{"type": "8-K", "sequence": "1", "filename": "for50505.txt", "secsgml_size_bytes": 6479}]
{"company-data": {"conformed-name": "THERMOGENESIS CORP", "cik": "0000811212", "assigned-sic": "3821", "irs-number": "943018487", "state-of-incorporation": "DE", "fiscal-year-end": "0630"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "333-82900", "film-number": "05803842"}, "business-address": {"street1": "2711 CITRUS ROAD", "city": "RANCHO CORDOVA", "state": "CA", "zip": "95742", "phone": "9168585100"}, "mail-address": {"street1": "2711 CITRUS ROAD", "city": "RANCHO CORDOVA", "state": "CA", "zip": "95742"}, "former-company": {"former-conformed-name": "INSTA COOL INC OF NORTH AMERICA", "date-changed": "19920703"}}
UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT
     Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

          Date of Report (Date of earliest event reported): May 5, 2005

                               THERMOGENESIS CORP.
             (Exact name of registrant as specified in its charter)

      Delaware                      0-16375                     94-3018487
      ---------                     --------                    ----------
  (State or other           (Commission File Number)         (I.R.S. Employer
  jurisdiction of                                           Identification No.)
 incorporation or
   organization)

                                2711 Citrus Road
                        Rancho Cordova, California 95742
                        --------------------------------
              (Address and telephone number of principal executive
                               offices) (Zip Code)

                                 (916) 858-5100
                                 --------------
              (Registrant's telephone number, including area code)

Checkthe   appropriate  box  below  if  the  Form  8-K  filing  is  intended  to
simultaneously  satisfy the filing obligation of the registrant under any of the
following provisions (see General Instruction A.2. below):

[ ] Written communications pursuant to Rule 425 under the Securities Act (17 CFR
    230.425)
[ ] Soliciting material pursuant to Rule 14a-12 under the Exchange Act
    (17 CFR 240.14a-12)
[ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange
    Act (17 CFR 240.14d-2(b))
[ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange
    Act (17 CFR 240.13e-4(c))
Section 5 - Corporate Governance and Management
-----------------------------------------------

Item 5.02.  Departure of Directors, Principal Officers; Election of Directors;
            Appointment of Principal Officers

     (c). Change in Chief Financial Officer.
     ---------------------------------------

     ThermoGenesis  Corp.  (the  "Company")  announced today that Matthew Plavan
effective May 31, 2005,  will be the  Company's  next Chief  Financial  Officer.
Renee Ruecker, the Company's current Chief Financial Officer,  effective May 31,
2005, will become the Company's Director of SEC Reporting.

     Mr.  Matthew  Plavan,  age 41,  from 2002 to 2005 was the  Chief  Financial
Officer of Strionair, Inc., a manufacturer of air-purification  technology. From
2000 to 2002, he was the CFO for Reason, Inc., a venture-backed  wireless device
management  company  acquired in 2002 by InPhonic,  Inc. From 1993 to 2000,  Mr.
Plavan served in a number of senior  management  roles at McKesson Corp. and its
subsidiaries,  including Vice President of Finance for iMcKesson, a $300 million
eHealth division providing healthcare information solutions. Mr. Plavan was also
General  Manager  of Disease  State  Management,  Senior  Director  of  Investor
Relations and Corporate  Controller  with  McKesson.  Prior to joining  McKesson
Corp.,  Mr. Plavan,  from 1987 to 1993, was an Audit Manager with Ernst & Young,
LLP. Mr.  Plavan earned his  bachelor's  degree in business  economics  from the
University of California at Santa Barbara and is a Certified Public Accountant.

     The Company entered into a three year employment  agreement with Mr. Plavan
where Mr.  Plavan will be paid an annual  salary of  $175,000  subject to annual
increases as may be  determined  by the Board of  Directors.  Mr. Plavan will be
paid moving expenses not to exceed  $40,000.  Mr. Plavan will be granted a seven
year option to purchase  90,000  shares of common stock vesting over five years.
Mr.  Plavan is  eligible to receive  bonuses  based on his  performance  and the
attainment of objectives  established by the Company. Mr. Plavan's bonuses shall
not  exceed  35% of his base  salary in effect  for any given  year and shall be
subject to Compensation  Committee oversight for meeting stated objectives.  The
employment agreement may be terminated prior to the expiration of the agreement,
upon the mutual  agreement  of the  Company and Mr.  Plavan.  In  addition,  the
employment agreement provides that in the event Mr. Plavan is terminated without
cause, Mr. Plavan will be paid an amount equal to 6 months salary.

     Mr. Plavan has not held any positions with the Company previously and there
are no related party transactions between Mr. Plavan and the Company. Mr. Plavan
has no family relation with any director or officer of the Company.
Section 9 - Financial Statements and Exhibits
---------------------------------------------

Item 9.01 Financial Statements and Exhibits
-------------------------------------------

         Exhibit No.                Exhibit Description
         -----------                -------------------
             10                     Employment Agreement with Matthew Plavan

             99                     Press Release titled "ThermoGenesis Corp.
                                    Retains Matthew Plavan, New Chief Financial
                                    Officer".
SIGNATURE

     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.

                                            THERMOGENESIS CORP.,
                                            a Delaware Corporation

Dated:  May 5, 2005                         /s/ Renee Ruecker
                                            -----------------------------------
                                            Renee Ruecker,
                                            Chief Financial Officer
EXHIBIT INDEX

         Exhibit No.                Description
         -----------                -----------
             10                     Employment Agreement with Matthew Plavan

             99                     Press Release titled "ThermoGenesis Corp.
                                    Retains Matthew Plavan, New Chief Financial
                                    Officer".