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Electrosurgical system for resection and ablation of tissue in electrically conductive fluids

  • US 5,888,198 A
  • Filed: 12/05/1996
  • Issued: 03/30/1999
  • Est. Priority Date: 01/07/1992
  • Status: Expired due to Term
First Claim
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1. An electrosurgical system comprising an electrosurgical probe and an electrosurgical power supply, wherein the electrosurgical probe comprises:

  • a shaft having a proximal end and a distal end;

    an electrode array disposed near the distal end of the shaft, said array including a plurality of electrically isolated electrode terminals disposed over a contact surface; and

    a connector near the proximal end of the shaft for electrically coupling the electrode terminals individually to the electrosurgical power supply;

    and wherein the electrosurgical power supply comprises;

    a multiplicity of current limiting elements for independently limiting power to each of the electrode terminals based on impedance at the electrode terminals; and

    a connector which mates with the shaft connector to electrically couple individual ones of said current limiting elements to individual ones of said electrode terminals.

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