Surgery – Instruments – Electrical application
Patent
1989-04-17
1990-03-06
Cohen, Lee S.
Surgery
Instruments
Electrical application
606 48, A61B 1739
Patent
active
049056913
ABSTRACT:
A polypectome snare whose loop comprises a pair of electrodes mechanically joined but electrically insulated from one another at their distal ends and adapted to be energized by a source of RF voltage for excising polyps on the inside of a body cavity is described. The polypectome snare is designed to be used with an endoscope and includes two concentric flexible plastic tubes each having proximal and distal ends and a lumen running the length thereof. At the proximal end is a hand grip which is secured to the wires leading to the bipolar electrodes with one of the wires passing through the lumen of the outermost tube and the other wire extending through the lumen of the inner tube. In this fashion, the wires remain insulated from one another over the length of the instrument and due to this same arrangement, the conductors comprising the bipolar electrodes cannot become twisted at the distal end of the implement to thereby create a short which would render the snare inoperative.
REFERENCES:
patent: 4311143 (1982-01-01), Komiya
patent: 4493320 (1985-01-01), Treat
Cohen Lee S.
Everest Medical Corporation
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