Electrosurgical device
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United States of America Patent
Stats
-
Dec 9, 1980
Grant Date -
N/A
app pub date -
Jan 23, 1975
filing date -
Jan 23, 1975
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A radio-frequency electrosurgical device which includes an active electrode, a passive electrode, and means for generating a radio-frequency potential. The generating means induces the radio-frequency potential on a primary winding of an isolation transformer. The secondary winding of the isolation transformer powers the active electrode. One end of the secondary winding of the isolation transformer is coupled to a return lead connected to the passive electrode and also is coupled to ground through a primary winding of a second transformer. If the passive electrode is disconnected from the return line, there can be an alternate radio-frequency current return path to ground, and a potential is developed across the primary winding of the second transformer. This potential is used to energize a relay to actuate an alarm and to disable the radio-frequency generator if the passive electrode becomes disconnected.
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