Electrosurgical power control

Details Electrosurgical power control Electrosurgical power control

2005-06-22

2010-02-02

Cohen, Lee S (Department: 3739)

Surgery

Instruments

Electrical application

C606S034000, C606S038000, C606S039000, C606S040000

Reexamination Certificate

active

07655003

ABSTRACT:
A method and apparatus include determining a value of a parameter associated with operation of an electrosurgical probe having a particular probe design, and determining whether the value of the parameter is within a range of values that has been predetermined for the particular probe design to indicate that the probe is treating tissue in a desired manner. Power is delivered to the probe according to an algorithm based upon a determination that the value of the parameter is outside the range of values The algorithm delivers power in a pulsed profile including portions of low power and portions of high power. In one embodiment, the tissue treatment is ablation, the parameter is impedance, and the method limits tissue necrosis to less than 200 microns. In another embodiment, the tissue treatment is shrinkage, the parameter is temperature, and the method limits power delivery when the probe is not shrinking tissue.

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