High frequency instrument for incision and excision
US4638802A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 6, 1985 |
| Grant date | Jan 27, 1987 |
| Priority date | — |
| Expiry date | Sep 6, 2005 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2018/1407
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A high frequency instrument for incision and excision of the tissue of an affected part by a semi-circular loop formed by the distal end of a wire electrode upon passage of high frequency current therethrough is disclosed. The wire electrode is disposed within an electrically insulating sheath so as to be movable therein, and may be advanced or retracted by operating a proximate and operating unit. Only the advancing and retracting movement of the operating unit and the operating pipe are transmitted to the wire electrode while rotation of the operating unit and the operating pipe is not transmitted to the semi-circular loop of the wire electrode, thus preventing the loop from becoming entangled with the tissue of an affected part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.