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Gradually self-expanding stent

  • US 9,345,601 B2
  • Filed: 06/12/2014
  • Issued: 05/24/2016
  • Est. Priority Date: 12/23/2008
  • Status: Active Grant
First Claim
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1. A self-expanding stent, comprising:

  • a stent structure comprising a plurality of stent cells having a compressed configuration and an expanded configuration, said stent structure having a first region comprising a first plurality of said stent cells and a second plurality of said stent cells dispersed circumferentially amongst said first plurality of said stent cells, each of said first plurality of said stent cell comprising at least a pair of circumferentially adjacent structural members connected to each other through a first bend, said stent structure being self-expanding from said compressed configuration to said expanded configuration;

    a first restraining material attached to said stent structure and extending across an entirety of first material area defined by the pair of circumferentially adjacent structural members and the first bend, said second plurality of said stent cells being unrestrained by the first restraining material, said first restraining material initially restraining said stent structure from expanding to said expanded configuration, and said first restraining material releasing said stent structure over time to allow said stent structure to expand to said expanded configuration; and

    an anti-thrombotic drug incorporated into said first restraining material.

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