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Stent construction of rolled configuration

  • US RE35,988 E
  • Filed: 04/12/1996
  • Issued: 12/08/1998
  • Est. Priority Date: 08/05/1992
  • Status: Expired due to Term
First Claim
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1. A stent assembly for placement in a body passage to reinforce a damaged wall in the passage, comprising:

  • an elongated core;

    an elongated, flexible sheet arranged on said core in a multiple layer roll having expanded and contracted conditions and having a spring force so that said sheet is urged toward the expanded condition, said roll being tightly wound on the core in the contracted condition and presenting in the expanded condition a diameter at least equal to the diameter of the body passage.said roll being spirally wound on said core and having a tendency to radially expand, said roll presenting a plurality of adjacent, arcuate layers of said sheet in a direction transverse to the longitudinal axis of said core;

    releasable means for retaining said roll in the contracted condition on said core while the core is being inserted into the passage to the location of the damaged walls; and

    means for effecting release of said releasable means to permit the roll to expand against the damaged wall in the expanded condition of the roll,said roll in the expanded condition thereof having at least two overlapping layers which overlap and bear against one another over a substantial portion of the circumference of . .a.!. .Iadd.an .Iaddend.inner layer, said expanded roll adapted for securely contacting said damaged wall by virtue of said radial expansion tendency.

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