Electrosurgical generator and methods
US11129660B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 12, 2016 |
| Grant date | Sep 28, 2021 |
| Priority date | — |
| Expiry date | Jun 24, 2038 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2218/007
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The disclosed technology is directed to a RF power generator and feedback control system used to regulate the electrical power delivered to a cutting filament (i.e., a cutting electrode) of an electrosurgical instrument. The electrosurgical instrument uses the delivered energy to form a cutting arc for ablating a tissue mass to access a target tissue therein. The instrument forms a basket-like receptacle around the target tissue to excise the target tissue from the ablated tissue mass. As the instrument forms the receptacle, the length of exposed filament ablating the tissue changes. To this end, the RF power generator described herein is configured to vary the total power delivered during the deployment of the instrument based on a measurement of output power derived from a differential phase angle between a current sense output and a voltage sense output, in some embodiments, to maintain a uniform power density along the length of exposed filament.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.