Electrosurgical instrument
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United States of America Patent
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Mar 6, 2001
Grant Date -
N/A
app pub date -
Jul 9, 1999
filing date -
May 6, 1998
priority date (Note) -
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Abstract
Electrosurgical instruments for the coagulation of biological tissue are known that comprise a gas source to supply an inert gas, in particular a noble gas, to at least one outflow opening as well as an HF source to supply a coagulation current to an electrode device that is disposed in the region of the at least one outflow opening. It is proposed to make the outflow opening slit-shaped in such a way that the inert gas emerges in a flat or fan-shaped stream, which in its marginal regions flows laminarly so that the inert gas reaches the tissue substantially without becoming mixed with ambient air.
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