Electrosurgical instrument and method of use
US7083619B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 19, 2002 |
| Grant date | Aug 1, 2006 |
| Priority date | — |
| Expiry date | Jul 22, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2018/0063
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An electrosurgical medical device and method for creating thermal welds in engaged tissue. In one embodiment, at least one jaw of the instrument defines a tissue engagement plane carrying a conductive-resistive matrix of a conductively-doped non-conductive elastomer. The engagement surface portions thus can be described as a positive temperature coefficient material that has a unique selected decreased electrical conductance at each selected increased temperature thereof over a targeted treatment range. The conductive-resistive matrix can be engineered to bracket a targeted thermal treatment range, for example about 60° C. to 80° C., at which tissue welding can be accomplished. In one mode of operation, the engagement plane will automatically modulate and spatially localize ohmic heating within the engaged tissue from Rf energy application—across micron-scale portions of the engagement surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.