Electrosurgical generator with improved rapid start capability
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United States of America Patent
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-
Sep 25, 1984
Grant Date -
N/A
app pub date -
Dec 8, 1982
filing date -
Dec 8, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electrosurgical generator, having particular utility in arthroscopic surgical procedures, is provided with a rapid start capability in its pure cut mode by inhibiting secondary modulation for an initial starting interval during which an uninterrupted high frequency cutting signal is applied to the output terminals. Upon expiration of the starting interval, the secondary modulation takes effect to modulate the cutting signal with a low frequency repetitive signal having a predetermined duty cycle. In addition, the generator output isolation transformer is arranged to provide an output impedance of at least 1,000 Ohms to match the impedance of human joints on which arthroscopic surgery is performed.
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