Electrode for coagulation and resection
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United States of America Patent
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-
May 12, 1998
Grant Date -
N/A
app pub date -
Aug 23, 1996
filing date -
Aug 23, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A surgical instrument electrode having a tissue cutting edge disposed along a front portion and a gap having a depth extending along an axis passing through the front portion and a rear portion wherein the depth terminates in a region between the front portion and the rear portion. With such an arrangement, relatively deep gaps may be formed in the electrode without requiring a corresponding increase in the bluntness of the tissue cutting edge. In addition, the electrode has a cross-sectional shape substantially continuously changing along a portion of the electrode from a substantially circular cross-section at a distal end to a substantially rectangular cross-section along the tissue cutting edge. Due to the continuous nature of the change, undesirable electrical arcing due to the shape change is substantially reduced, and is in effect removed.
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