Impedance feedback electrosurgical system and tool

Details Impedance feedback electrosurgical system and tool Impedance feedback electrosurgical system and tool

A - Human Necessities

61

B

A61B 18/12 (2006.01) A61B 5/053 (2006.01)

Patent

CA 2605279

An impedance feedback electro-surgical system is useful with electro-surgical tools to maintain a preselected control range of tissue impedance within the tissue in contact with the tool. The system comprises an active electrode associated with an electro-surgical tool, a return electrode, in the form of a remote ground pad which is in contact with the patient, an impedance monitoring device and a power control unit. Energy sufficient to affect tissue is delivered through the active electrode to tissue and to the return electrode. The impedance measuring device determines the impedance of the tissue based on the voltage differential between the active electrode and ground pad. A signal representative of the measured impedance is communicated to the power control unit which adjusts the energy applied to the tissue to maintain a preselected impedance range.

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