An electrosurgical generator

Details An electrosurgical generator An electrosurgical generator

A - Human Necessities

61

B

A61B 18/14 (2006.01) A61B 18/12 (2006.01) A61N 5/00 (2006.01)

Patent

CA 2308931

An electrosurgical generator has sensing circuitry for sensing changes in reflected power fed back from a radio-frequency output of the generator, and a control arrangement coupled to the sensing circuitry for processing a reflected power monitoring signal. The control arrangement acts to reduce or stop the application of radio frequency power to the generator output in response to a predetermined condition of the monitoring signal indicative of a change in reflected power due to a change in the state of the tissue being treated. The generator has upper and lower frequency parts operable above and below 300MHz, both parts being connected to the generator output, and the control arrangement reduces or cuts off the applied radio frequency power when the load impedance sensed at the operating frequency of the lower frequency part changes.

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