05320611 is referenced by 307 patents and cites 16 patents.

Cannulas for surgical and medical use expand along their entire lengths. The cannulas are inserted through tissue when in an unexpanded condition and with a small diameter. The cannulas are then expanded radially outwardly to give a full-size instrument passage. Expansion of the cannulas occurs against the viscoelastic resistance of the surrounding tissue. The expandable cannulas do not require a full depth incision, or at most require only a needle-size entrance opening.

Title
Expandable cannula having longitudinal wire and method of use
Application Number
8/13942
Publication Number
5320611
Application Date
February 4, 1993
Publication Date
June 14, 1994
Inventor
James S Hawkins
Urbana
IL, US
Peter M Bonutti
1303 W. Evergreen Pl., Effingham, 62401
IL, US
Agent
Tarolli Sundheim & Covell
Assignee
Peter M Bonutti
IL, US
IPC
A61M 5/00
A61M 25/00
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