Percutaneous laparoscopic cholecystectomy instrument
US5071419A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1990 |
| Grant date | Dec 10, 1991 |
| Priority date | — |
| Expiry date | Apr 30, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2018/00119
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An instrument for performing a percutaneous laparoscopic cholecystectomy includes a generally rigid, tubular body with a proximal end, a distal end and a lumen extending between these two ends and with a pair of bipolar electrodes projecting from the distal end of the tubular body and a handle member affixed to its proximal end. The outside diameter of the tubular body is sufficiently small that it can readily pass through a cannula inserted through a puncture made through the abdominal wall. A pair of conductors, connected at one end to the bipolar electrodes and at their other end to a source of radio frequency voltage, extend through the tube's lumen and a handle. Moreover, a fluid port may be formed through the handle so as to be in fluid communication with the lumen of the tube whereby fluids may be perfused through the instrument during its use or a suction may be applied to the proximal port for aspirating the surgical site. In one embodiment of the invention, the bipolar electrodes may be formed as conductive traces extending along the peripheral edges of a thin ceramic blade. In an alternative arrangement, the bipolar electrodes comprise first and second closely spaced J-s…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.