System and method for output control of electrosurgical generator
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United States of America Patent
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Jul 24, 2012
Grant Date -
Dec 10, 2009
app pub date -
Jun 10, 2008
filing date -
Jun 10, 2008
priority date (Note) -
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Abstract
An electrosurgical system and method are disclosed. The system includes an electrosurgical generator adapted to supply electrosurgical energy to tissue. The generator includes sensor circuitry adapted to continuously monitor tissue impedance to generate a variance impedance curve and a microprocessor adapted to calculate a slope of a segment of the variance impedance curve. The microprocessor also calculates a bubble factor that represents the rate of formation and absorption of bubbles within tissue to determine minimum tissue impedance and maximum tissue conductance. The system further includes an electrosurgical instrument which includes one or more active electrodes adapted to apply electrosurgical energy to tissue.
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