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Sleeve trocar with penetration indicator

  • US 6,228,058 B1
  • Filed: 12/10/1998
  • Issued: 05/08/2001
  • Est. Priority Date: 04/03/1997
  • Status: Expired due to Term
First Claim
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1. A sleeve trocar for piercing tissue to provide a conduit to an internal body cavity insufflated by gas, said trocar comprising:

  • a sleeve member having a generally tubular wall member defining a bore therethrough;

    a cutting edge;

    an obturator assembly telescopically disposed within said sleeve member, said obturator assembly including at least one movable obturator portion having a generally blunt tip, said at least one movable obturator portion being movable between a first position wherein said generally blunt tip projects beyond said wall member and a second position wherein said generally blunt tip is disposed interiorly of at least a portion of said cutting edge, and at least one stationary obturator portion having a face member, said least one stationary obturator portion being fixed relative to said sleeve member with said face member projecting beyond a portion of said wall member; and

    means for biasing said at least one movable obturator portion into said first position;

    wherein said cutting edge includes a sharp piercing tip formed thereon and said movable obturator portion projects beyond said piercing tip in said first position.

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