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Lipped cannula and methods of introducing surgical instruments in arthroscopic surgical procedures

  • US 5,234,455 A
  • Filed: 02/20/1992
  • Issued: 08/10/1993
  • Est. Priority Date: 02/20/1992
  • Status: Expired due to Term
First Claim
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1. A cannula for introducing surgical instruments in the body through a portal of minimal size formed in a wall of anatomical tissue includingan elongate member having a distal end to be inserted through the portal into the body, a proximal end and a cross-sectional configuration having a periphery;

  • a housing mounting said proximal end of said cylindrical member to be disposed externally of the body;

    a lumen through said cylindrical member and said housing providing a passage for receiving surgical instruments to be introduced in the body; and

    a lip on said elongate member proximally spaced from said distal end and having a periphery immovably spaced outwardly from said periphery of said elongate member to be disposed within the body, said lip including a substantially planar surface for engaging the wall of the body with said distal end inserted in the body to prevent backing out of said distal end from the body.

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