Endoscopic fluid changing device

Details Endoscopic fluid changing device Endoscopic fluid changing device

1986-08-29

1988-04-12

Grieb, William H.

Surgery

Truss

Perineal

A61B 112

Patent

active

047367326

ABSTRACT:
Disclosed is a construction of an endoscopic fluid changing device which, attached to an endoscope, regulates the flow of a fluid in a channel of the endoscope. The fluid changing device comprises a cylindrical casing having a suction port, in the side wall thereof, a channel pipe provided in the center of the casing, and having an opening at the upper end portion thereof, the lower end portion of the channel pipe being connected to an instrument channel, extending to the distal end portion of the endoscope, a cap member covering the opening of the channel pipe, a piston disposed between the casing and the channel pipe, and capable of vertical motion, a spring for urging the piston upward, first valve device provided at the upper portion of the piston, and adapted to open or close a first passage as the piston is operated, the first passage extending from the suction port to the outside of the casing, and second valve device provided at the lower portion of the piston, and adapted to close or open a second passage, in contrast with the first passage, as the piston is operated, the second passage extending from the suction port to the instrument channel.

REFERENCES:
patent: 4198958 (1980-04-01), Utsugi
patent: 4412531 (1983-01-01), Chikashige
patent: 4469090 (1984-04-01), Konomura
patent: 4489712 (1984-12-01), Ohshima
patent: 4509507 (1985-04-01), Yabe
patent: 4537182 (1985-08-01), Otani
patent: 4537209 (1985-08-01), Sasa
patent: 4561428 (1985-12-01), Konomura

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