MULTIPLE PARAMETER FAULT DETECTION IN ELECTROSURGICAL INSTRUMENT SHIELDS
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United States of America Patent
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Jun 5, 2017
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Oct 26, 2007
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Abstract
A system and method for detecting faults within a shielded electrosurgical instrument are disclosed. The method includes sensing at least two of: an active voltage in the active electrode; a current in the active or return electrodes; or power in the electrosurgical instrument shield. The method also includes determining whether a power fault exists, wherein determining whether a power fault exists includes multiplying the sensed current and the sensed active voltage. The method also includes determining at least one of: whether one or more current faults exists; or whether a capacitance fault exists. The method also includes altering power delivery to the active electrode if any of the power fault, current faults, or capacitance faults exist.
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