Electrosurgical system

Details Electrosurgical system Electrosurgical system

2011-03-08

2011-03-08

Cohen, Lee S (Department: 3739)

Surgery

Instruments

Electrical application

C606S034000, C606S039000

Reexamination Certificate

active

07901401

ABSTRACT:
An electrosurgical system comprises a generator and an instrument including a first electrode, a second electrode, and an insulating spacer separating the first and second electrodes. The generator repeatedly measures a characteristic of the radio frequency output such as the impedance between the first and second electrodes. The generator analyses the impedance measurements, and interrupts the radio frequency signal when the rate of change of the impedance is such as to indicate the onset of a “flare-out”. In this way, the power is reduced before the flare-out leads to permanent damage or failure of the instrument.

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