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Electrosurgical instrument and an electrosugery system including such an instrument

  • US 20040181219A1
  • Filed: 03/25/2004
  • Published: 09/16/2004
  • Est. Priority Date: 02/08/2000
  • Status: Abandoned Application
First Claim
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1. An electrosurgery system for treating tissue immersed in an electrically conductive fluid, comprising:

  • a generator for delivering a radio frequency tissue treatment output in the frequency range of from 100 kHz to 50 MHz, and an elongate instrument shaft configured to be mounted at a proximal end to a handpiece and carrying at its distal end a bipolar electrode assembly connected to the generator, wherein the electrode assembly includes;

    an active electrode with an active zone at a distal end of the active electrode; and

    a return electrode with a return zone near the active zone;

    wherein at least one of the active and return zones has an electrically insulating dielectric covering such that in use a radio frequency electrical circuit between the active and return electrodes through the conductive fluid is completed preliminary by dielectric coupling through the dielectric covering.

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