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Stent and method and apparatus for forming and delivering the same

  • US 5,902,317 A
  • Filed: 08/19/1997
  • Issued: 05/11/1999
  • Est. Priority Date: 06/01/1994
  • Status: Expired due to Fees
First Claim
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1. A stent for insertion in a body vessel comprising an elongate body member having a longitudinal axis with a skeletal frame formed to define an elongate chamber which extends through said body member, the skeletal frame being formed to assume a first collapsed configuration toward said longitudinal axis for insertion in said body vessel and to expand radially outward from said collapsed configuration to a second expanded configuration to contact and apply radial force to said body vessel, said skeletal frame further being formed to define a plurality of interconnected open cells with each of said cells including two substantially parallel, spaced side walls which are substantially parallel to said longitudinal axis in both the first collapsed configuration and the second expanded configuration of said skeletal frame and end walls extending between said sidewalls at an angle to said longitudinal axis, said cells being arranged around said elongate chamber with sidewalls of adjacent cells arranged in adjacent coextensive relationship, said cells joined together by an attachment connecting adjacent, coextensive cell sidewalls, this being the only connection between said cells, said skeletal frame further including a first area including cells which are designed differently from cells in at least a second area of said skeletal frame to cause different radial forces to be applied to said body vessel by said first and second areas in the expanded configuration of said skeletal frame.

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