Selectable seal cannula

Details Selectable seal cannula Selectable seal cannula

1992-06-24

1993-05-18

Yasko, John D.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604256, A61M 5178

Patent

active

052116336

ABSTRACT:
A surgical cannula with selectable seals which assure a fluid-tight fit around medical devices of a variety of sizes. The cannula includes a tubular member insertable into a medical patient and having a side wall defining a lumen through which a medical device may be inserted. The cannula also includes a housing mounted to a proximal end of the tubular member wherein the housing has a passage allowing insertion of a medical device therethrough and into the lumen. A movable member is mounted to the housing and is selectively movable between a first position and a second position across the passage. When the movable member is in its first position the passage accommodates insertion of a first medical device having a first outer cross-sectional dimension. A first valve body is mounted in the movable member and has a first opening therein corresponding in size to the outer cross-sectional dimension of a smaller second medical device, wherein the first opening is smaller than the passage. When the movable member is in its second position the first valve body provides a fluid tight seal around the second medical device.

REFERENCES:
patent: 4000739 (1977-01-01), Stevens
patent: 4177814 (1979-12-01), Knepshield et al.
patent: 4655752 (1987-04-01), Honkanen et al.
patent: 4895346 (1990-01-01), Steigerwald
patent: 4895565 (1990-01-01), Hillstead
patent: 4909798 (1990-03-01), Fleischhacker et al.
patent: 5020543 (1991-06-01), Rothenberg et al.
patent: 5041097 (1991-08-01), Johnson
patent: 5092857 (1992-03-01), Fleischhacker

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