Power control for beam-type electrosurgical unit
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United States of America Patent
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Feb 20, 1990
Issued Date -
N/A
app pub date -
Jul 26, 1988
filing date -
Apr 8, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An electrosurgical generator in an electrosurgical unit (ESU) controls the repetition rate and the energy content of bursts of RF energy delivered to a gas jet supplied by the ESU, in order to maintain RF leakage current within acceptable limits while still achieving a sufficient state of ionization in the gas jet to reliably initiate the conduction of arcs to the tissue. The repetition rate of the RF bursts is substantially reduced in an inactive state when no arcs are delivered. A relatively small number of the RF bursts delivered during the inactive state have an increased or boosted energy content to assure an adequate ionization state in the gas jet.
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