Electrosurgical generator and system
US7993332B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 6, 2007 |
| Grant date | Aug 9, 2011 |
| Priority date | — |
| Expiry date | Jun 8, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2018/1467
- WIPO fieldMedical technology
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.