Hemostatic bi-polar electrosurgical cutting apparatus
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United States of America Patent
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Jul 7, 1998
Issued Date -
N/A
app pub date -
Jan 3, 1997
filing date -
Jun 7, 1991
priority date (Note) -
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Abstract
A surgical instrument is described that incorporates bipolar electrodes on opposing shearing members for passing a high frequency current through the tissue for causing hemostasis of the tissue and for cutting the tissue. An electrically insulating material is interposed between the shearing members so that the electrodes are spaced apart from 0.002 to 0.050 inches and the current passes between the opposing electrodes through the tissue and not between the opposing shearing surfaces. The insulating material has a higher hardness than the opposing members to reduce wear of the insulation and provide a self-sharpening feature. Methods of simultaneously causing tissue and severing tissue are also provided. The use of a constant voltage high frequency power supply to deliver current to the tissue to cause hemostasis is described in conjunction with those methods.
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