05514153 is referenced by 438 patents and cites 14 patents.

An active cannula or sleeve which does more than merely maintain a channel or passage is usable to create and/or enlarge a channel or passage, to position a scope or instrument, to move or locate tissue, etc. The cannula can vary in size or shape as needed, intraoperatively. Because a cannula of the present invention is expandable, the surgeon can make a small relatively small incision, stretch the tissue with the expandable cannula, contract the cannula and remove it, allowing the skin to come back to its unstretched condition. Thus, a smaller incision can be made to fit the same size instrument. This results in less trauma and scarring and an easier operation. The cannulas are or can assume such a non-circular shape, to fit into a natural skin opening and cause less trauma. The devices can be used to seal off a space; to expand an existing space or a potential space for working or visualization; to move tissue (for example, to stretch an incision) or to protect it.

Title
Method of dissecting tissue layers
Application Number
487645
Publication Number
5514153
Application Date
February 14, 1994
Publication Date
May 7, 1996
Inventor
Peter M Bonutti
Effingham
IL, US
Agent
Lyon & Lyon
Assignee
General Surgical Innovations
CA, US
IPC
A61M 29/02
A61B 1/32
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