High frequency resection endoscope with movement actuated switch

Details High frequency resection endoscope with movement actuated switch High frequency resection endoscope with movement actuated switch

1985-03-13

1987-02-24

Coven, Edward M.

Surgery

Truss

Pad

A61B 1739

Patent

active

046449507

ABSTRACT:
A resection endoscope has a high frequency energized cutting electrode which can be moved longitudinally by a carrier. A switch for the high frequency current is mounted on the carrier so that when the carrier is actuated in the cutting direction the current is switched on and is otherwise switched off. Thus the switch actuation is coupled to the carrier actuation for simplifying the operation. A certain lost motion is advantageously provided for the switch actuation which enables the high frequency current to be selectively switched on or off even when the cutting electrode is stationary.

REFERENCES:
patent: 2545865 (1951-03-01), Wallace
patent: 4030502 (1977-06-01), Iglesias
patent: 4041952 (1977-08-01), Morrison et al.
patent: 4060086 (1977-11-01), Storz
patent: 4174714 (1979-11-01), Mehl
patent: 4274070 (1981-06-01), Thiene
patent: 4274413 (1981-06-01), Hahn et al.
patent: 4430996 (1984-02-01), Bonnet
patent: 4540871 (1985-09-01), Corrigall et al.

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