05002557 is referenced by 312 patents and cites 8 patents.

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.

Title
Laparoscopic cannula
Application Number
7/334452
Publication Number
5002557
Application Date
April 6, 1989
Publication Date
March 26, 1991
Inventor
Harrith M Hasson
2043 N. Sedgwick, Chicago, 60614
IL, US
Agent
Wood Phillips Mason Recktenwald & VanSanten
IPC
A61M 37/00
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