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Arc Generation in a Fluid Medium

  • US 20090254077A1
  • Filed: 03/20/2009
  • Published: 10/08/2009
  • Est. Priority Date: 04/08/2008
  • Status: Abandoned Application
First Claim
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1. An electrosurgical generator, comprising:

  • a radio frequency output stage configured to generate at least one radio frequency waveform to an active electrode of an electrosurgical instrument when the active electrode is disposed in a fluid medium;

    a sensor circuit configured to measure tissue impedance; and

    a controller configured to increase power of the at least one radio frequency waveform to a predetermined electrical arcing level in response to the tissue impedance being within an open circuit impedance range and tissue contact impedance range, the controller being further configured to lower the power of the at least one radio frequency waveform to a lower level when the tissue impedance is outside the open circuit impedance range and the tissue contact impedance range.

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