05342382 is referenced by 226 patents and cites 10 patents.

A safety trocar is provided which includes a spring-loaded shield that shields the cutting tip of the obturator after the obturator penetrates tissue. The distal end of the shield is hemispheric in profile and contains slides within cutting tip. The rounded distal end enables the shield to spring forward to shield the cutting tip as soon as the tip perforates the tissue. In other embodiments, positive mechanical means effect shielding. Alternately, the obturator tip is retractable into the cannula or shield, by use of mechanical means such as a spring mechanism.

Title
Surgical trocar
Application Number
641379
Publication Number
5342382
Application Date
April 20, 1993
Publication Date
August 30, 1994
Inventor
Martin Madden
Cincinnati
OH, US
Harry C Parkhurst
Cincinnati
OH, US
Earl J Mills
Cincinnati
OH, US
Ronald J Brinkerhoff
Amelia
OH, US
Agent
Paul A Coletti
Assignee
Ethicon
NJ, US
IPC
A61B 17/34
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