Electrosurgical generator and system

Details Electrosurgical generator and system Electrosurgical generator and system

2011-08-09

2011-08-09

Cohen, Lee (Department: 3739)

Surgery

Instruments

Electrical application

C606S042000, C606S048000, C606S051000

Reexamination Certificate

active

07993332

ABSTRACT:
An electrosurgical system includes a generator for generating radio frequency power, and an electrosurgical instrument including at least three electrodes and. The generator includes a radio frequency output stage having at least a pair of RF output lines, and a power supply coupled to the output stage for supplying power to the output stage. A controller is operable to limit the radio frequency output voltage developed across the output lines to at least a first predetermined threshold value to produce a cutting RF waveform, and a second threshold value to produce a coagulating RF waveform. In a combined mode, the controller delivers both cutting and coagulating waveforms, either simultaneously or by alternating constantly between the first and second threshold values to form a blended signal. The system also includes means for feeding the waveform to the three or more electrodes such that the cutting RF waveform is delivered between a first pair of the electrodes, and the coagulating waveform is delivered between a second pair of the electrodes.

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