Electrosurgical apparatus and method employing constant voltage

Details Electrosurgical apparatus and method employing constant voltage Electrosurgical apparatus and method employing constant voltage

A - Human Necessities

61

B

A61B 18/14 (2006.01) A61B 18/12 (2006.01) A61B 17/32 (2006.01) A61B 17/39 (1990.01)

Patent

CA 2110923

Methods and apparatus (10, 11, 12, 13, 14, 15) are provided for use in performing electrosurgery, wherein a power supply (14) supplies an electrosurgical instrument (11,12,13) with a low voltage power signal having a sub- stantially constant peak-to-peak voltage that is independ- ent of the load impedance and which has a crest factor near unity. A power supply (14) is provided to supply a voltage waveform in accordance with the methods of the invention. A clipping circuit is also provided to permit practice of the methods using conventional electrosurgical generators and previously known electrosurgical instru- ments, wherein the voltage amplitude and waveform is modified o the desired regime.

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