04716901 is referenced by 288 patents and cites 7 patents.

The invention relates to a surgical appliance for forming an opening through the skin of a patient and for distending the opening so formed. The appliance takes the form of a trocar which may comprise two separate components or two component portions formed by openings in a tube extending partially along the tube from the distal end. In either case, the components or component portions are preloaded towards a closed condition, but can be expanded into an open condition, for example by forcing a tubular expander into the trocar from the proximal end. The preloading of the trocar may be by a resilient sleeve surrounding the components or by a "set" introduced into the material forming the components. A cutting edge may be formed across substantially the full width of the distal end of the trocar and it is preferred that in the open condition, there is a no significant increase in the cross-section of the trocar towards the distal end.

Title
Surgical appliance for forming an opening through the skin
Application Number
6/779810
Publication Number
4716901
Application Date
September 25, 1985
Publication Date
January 5, 1988
Inventor
Steven S Gill
Knebworth
GB
Joseph F Jackson
Halifax
GB
Agent
Richard E Jenkins
Assignee
Pratt Burnerd International
GB
IPC
A61M 29/00
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