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Electrosurgical system employing multiple electrodes and method thereof

  • US 7,553,309 B2
  • Filed: 10/03/2005
  • Issued: 06/30/2009
  • Est. Priority Date: 10/08/2004
  • Status: Active Grant
First Claim
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1. A method for heat ablation of tissue in a patient, the method comprising the steps of:

  • inserting at least two electrodes into the tissue;

    placing at least one return electrode in contact with the patient;

    sequentially applying energy to each of said at least two electrodes for a pre-determinable period of time, wherein said pre-determinable period of time is determined by the procedure and the number of selected electrodes;

    determining a parameter at the energized electrode wherein the parameter is selected from a group consisting of impedance, temperature or time and any combination thereof;

    switching the applied energy to a next electrode if the parameter is above a predetermined limit;

    determining an off time of a next electrode in sequence;

    comparing the off time to a predetermined minimum off time, wherein the predetermined minimum off time is determined by a number of electrodes selected; and

    if the off time is less than the minimum off time, skipping over the next electrode in sequence.

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