Electrosurgical system

Details Electrosurgical system Electrosurgical system

2007-05-22

2007-05-22

Johnson, III, Henry M (Department: 3739)

Surgery

Instruments

Electrical application

C128S898000, C606S041000, C606S048000

Reexamination Certificate

active

10464778

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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