Laparoscopic cannula

Details Laparoscopic cannula Laparoscopic cannula

1989-04-06

1991-03-26

Hafer, Robert A.

Surgery

Instruments

Internal pressure applicator

604 26, 604 42, 604174, A61M 3700

Patent

active

050025570

ABSTRACT:
A laparoscopic cannula is provided having a sleeve defining a hollow passageway through which a surgical instrument can be directed and having a proximal end and a distal end which projects into a cavity with the sleeve in its operative position, expandable structure at the distal end of the sleeve which is selectively expandable and collapsible and which prevents withdrawal of the sleeve in its expanded state, structure for selectively expanding and collapsing the expandable structure, a retaining collar with a tapered surface, and cooperating structure on the sleeve and collar for permitting movement of the collar relative to the sleeve towards the sleeve distal end whereby body tissue through which the sleeve is directed can be captured between the tapered collar surface and expandable structure to maintain the sleeve in its operative position.

REFERENCES:
patent: 3039468 (1962-06-01), Price
patent: 3253594 (1966-05-01), Matthews et al.
patent: 3459175 (1969-08-01), Miller
patent: 3817251 (1974-06-01), Hasson
patent: 4077412 (1978-03-01), Moossun
patent: 4379458 (1983-04-01), Bauer et al.
patent: 4535773 (1985-08-01), Yoon
patent: 4540404 (1985-09-01), Wolvek

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