Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1993-05-18
1994-09-27
Yasko, John D.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604247, 604264, A61M 5178
Patent
active
053503627
ABSTRACT:
A surgical cannula having selectable gaskets which assure a fluid-tight seal around medical devices of a variety of sizes. The cannula includes a tubular member insertable into a medical patient, a two-piece housing mounted to the proximal end of the tubular member, and a movable member mounted to the housing and selectively movable between a first position and a second position across the passage. The movable member has at least two apertures through which surgical instruments may be passed.
A first gasket is included in the two-piece housing to seal around the largest instruments passed through the cannula. A second gasket is included in the movable member to provide a fluid-tight seal when smaller instruments are used. When the movable member is in its first position a gasketless aperture in the movable member is aligned with the lumen of the tubular member to accommodate large medical instruments. When the movable member is in its second position the second gasket is aligned with the lumen to provide 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: 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
Two photographs of an Originsingle use surgical trocar and sleeve, with accompanying photocopy of package insert, of Origin Medsystems, Inc., San Carlos, Calif.
Two photographs of a Trocan.TM. 5 mm Disposable Surgical Trocar and Cannula (reorder No. 004536-901) of Cabot Medical Corporation, Langhorne, Pa., which is marked on its packaging with the above-cited U.S. Pat. No. 4,177,814, with accompanying photocopy of reverse side of packaging for such trocar and cannula.
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