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Stent

  • US 5,853,419 A
  • Filed: 03/17/1997
  • Issued: 12/29/1998
  • Est. Priority Date: 03/17/1997
  • Status: Expired due to Fees
First Claim
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1. A stent comprising a cylindrical member having an outside diameter, a length and having first and second ends and an intermediate portion between the first and second ends, said cylindrical member being formed of a metal and having a wall defining a central bore having a longitudinal axis extending from the proximal end to the distal end, said cylindrical member having a plurality struts extending in the wall spaced apart of the longitudinal axis and permitting radial expansion of the cylindrical member from a contracted condition to an expanded condition, means extending in the wall to prevent shrinkage in length of the cylindrical member as it is expanded from a contracted position to an expanded position, said means extending in the wall to prevent shrinkage in length of the cylindrical member as it is expanded being comprised of a plurality of longitudinally extending circumferentially spaced-apart ribs which serve as compression resisting members, each of said ribs extending the length of the cylindrical member, said plurality of struts extending circumferentially between adjacent ribs and being secured to adjacent ribs, said plurality of struts when the cylindrical member is in a contracted position having portions which are folded with respect to each other, said plurality of struts including struts adjacent the first end of the cylindrical member having lengths which are greater than the lengths of at least certain of the other struts so as to permit said first end to be flared outwardly with respect to the intermediate portion when the stent is moved from the contracted condition to an expanded condition.

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