Electrosurgical instrument and method of use
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United States of America Patent
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app pub date -
Aug 3, 2005
filing date -
Oct 22, 2001
priority date (Note) -
Abandoned
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Abstract
Electrosurgical jaw structures are disclosed that include pressure sensitive variable resistive materials in electrosurgical energy delivery surfaces for welding tissue. The pressure sensitive materials are configured to have megaohm impedance when not engaging tissue and can transform into highly conductive electrodes when compressed under a selected pressure. In a method of the invention, the pressure sensitive variable resistive materials prevent arcing and tissue desiccation when applying bi-polar Rf current to tissue engaged under high compression in an electrosurgical jaw structure.
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