High-frequency generator for tissue cutting and for coagulating in high-frequency surgery
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United States of America Patent
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Apr 28, 1992
Grant Date -
N/A
app pub date -
May 5, 1989
filing date -
May 9, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a high-frequency generator with automatic power control for tissue cutting and for coagulating in high-frequency surgery. The power control in the 'cutting' mode of operation is effected with an arc control system for keeping the arc burning between the surgical probe and the tissue constant. The high-frequency generator contains a voltage-limiting circuit, which limits the output voltage to a preset maximum value if the arc control system were to adjust a higher voltage. The advantage of the invention lies is a reduction of the mean power delivered to the patient as compared with a high-frequency generator that contains only an arc control system. The cutting quality is not adversely influenced by the power reduction.
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