Electrosurgical system
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United States of America Patent
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Mar 8, 2011
Grant Date -
Aug 30, 2007
app pub date -
Apr 30, 2007
filing date -
Jun 27, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
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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