Surgery – Instruments – Electrical application
Reexamination Certificate
2010-01-21
2011-11-08
Cohen, Lee (Department: 3739)
Surgery
Instruments
Electrical application
C606S034000, C606S038000, C606S039000, C606S040000
Reexamination Certificate
active
08052675
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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Drucker Karen
Iki Kobi
Lorang Douglas M.
Mitchell Mathew E.
Cohen Lee
Fish & Richardson P.C.
Smith & Nephew Inc.
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