Exhibit 23.1
    

   
                           Consent of Independent Auditors
    

   
We consent to the reference to our firm under the caption "Experts" in Amendment
No. 2 to the Registration Statement (Form S-3, No. 333-68923) and the related
Prospectus of PLC Systems Inc. for the registration of $12,000,000 of its common
stock and to the incorporation by reference therein of our report dated February
20, 1998, with respect to the consolidated financial statements of PLC Systems
Inc. included in its Annual Report (Form 10-K) for the year ended December 31,
1997, and our report dated March 26, 1998 with respect to the related financial
statement schedule included therein, filed with the Securities and Exchange
Commission.
    

   
                                                      /s/ Ernst & Young LLP
                                                     ---------------------------
                                                      Ernst & Young LLP
    

   
Boston, Massachusetts
February 8, 1999