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Trocar system having expandable port

  • US 6,325,812 B1
  • Filed: 01/04/2000
  • Issued: 12/04/2001
  • Est. Priority Date: 03/05/1993
  • Status: Expired due to Fees
First Claim
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1. An apparatus for forming and enlarging a percutaneous penetration, said apparatus comprising:

  • an elongate dilation member including a radially expandable tubular braid and having a proximal end, a distal end, and an axial lumen with a first cross-sectional area;

    means at the distal end of the dilation member for puncturing tissue as the member is percutaneously advanced;

    an elongate expansion member including a fixed-radius tubular element having a distal end, a proximal end, and an axial lumen with a second cross-sectional area; and

    means at the distal end of the expansion member for facilitating insertion of the tubular element through the axial lumen of the dilation member.

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