RF generator system for surgical vessel sealing
US9039694B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 20, 2011 |
| Grant date | May 26, 2015 |
| Priority date | — |
| Expiry date | Dec 4, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Systems, methods, and apparatus for providing power to an electrosurgical instrument. In particular, a power supply is disclosed in which non-sinusoidal (e.g., pulsed) constant frequency voltage having a variable amplitude is passed to an LC circuit to produce a quasi-sinusoidal current in the LC circuit. The constant driving frequency can be one half the resonant frequency of the LC circuit allowing the LC circuit to operate as an impedance, and thus limit current spikes and arcing. The frequency and phasing of the driving voltage also enables the LC circuit to discharge energy back into a power provider of the power supply so that energy does not build up in the LC circuit. These features result in less severe current spikes and arcing, as well as reduced cutoff times.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.