EXHIBIT 32.2


CERTIFICATE OF THE PRINCIPAL FINANCIAL OFFICER
OF DIOMED HOLDINGS, INC. (REGISTRANT)
PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

          I, David B. Swank, Chief Financial Officer of the Registrant,  certify
to the best of my knowledge and belief pursuant to Section 906 of Sarbanes-Oxley
Act of 2002 (18 U.S.C. Section 1350) that:

          (1)     The Quarterly  Report on Form 10-QSB for the period ended June
                  30, 2004,  which this  statement  accompanies,  fully complies
                  with  the  requirements  of  section  13(a)  or  15(d)  of the
                  Securities Exchange Act of 1934; and

          (2)     The  information  contained  in the  Quarterly  Report on Form
                  10-QSB  fairly  presents,   in  all  material  respects,   the
                  financial   condition   and  result  of   operations   of  the
                  Registrant.


Date:  August 12, 2004                            /s/ DAVID B. SWANK
                                                  --------------------------
                                                  David B. Swank
                                                  Chief Financial Officer
                                                  (Principal Financial Officer)