Electrosurgical instrument
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United States of America Patent
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Dec 10, 2002
Grant Date -
N/A
app pub date -
Mar 23, 2000
filing date -
Jul 18, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An electrosurgical instrument is provided for the treatment of tissue in the presence of an electrically-conductive fluid medium. The instrument comprises an instrument shaft (10), and a tissue treatment electrode (12) at the distal end of the shaft for electrosurgically excising tissue pieces at an operation site. The tissue treatment electrode (12) is cyclically movable relative to the distal end of the shaft (10). Threshold control means are provided for controlling the power threshold for vaporization of the electrically-conductive fluid medium at the tissue treatment electrode (12).
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