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Method for the operation of a high frequency ablation apparatus and apparatus for the high frequency tissue ablation

  • US 6,193,713 B1
  • Filed: 12/10/1998
  • Issued: 02/27/2001
  • Est. Priority Date: 12/23/1997
  • Status: Expired due to Term
First Claim
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1. Method of operating a radiofrequency ablation instrument comprising a radiofrequency energy source having a plurality of regulatable outputs, with a plurality of electrodes being connectable to its outputs, at least one regulatable DC voltage source and at least one switching stare connected to the DC voltage source, the method comprising controlling for the generation of the radiofrequency output voltage, at the or each switching stage by a periodic switching signal, and regulating the voltage transmitted from the DC voltage source for the regulation of the voltage delivered by the radiofrequency energy source, detecting for each output a respective power value and/or current value representative of the power and/or the current transmitted by the radiofrequency energy source;

  • regulating a voltage transmitted from the radiofrequency energy source in dependence on the detected power value and/or current value such that the latter corresponds substantially to a predetermined power value and/or current value; and

    maintaining a predetermined phase relationship in each case between the currents or between the voltages at the outputs of the radiofrequency energy source.

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