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Shape memory bioresorbable polymer peripheral scaffolds

  • US 10,500,076 B2
  • Filed: 05/05/2017
  • Issued: 12/10/2019
  • Est. Priority Date: 07/23/2012
  • Status: Active Grant
First Claim
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1. A stent, comprising:

  • a scaffold formed from a polymer tube and configured for being crimped to a balloon,the scaffold having a pattern of interconnected struts andthe scaffold having an expanded diameter when expanded from a crimped state by the balloon,wherein the scaffold comprises a random copolymer of poly(L-lactide) (PLLA) and polycaprolactone (PCL) and the PCL is 3 to 10 wt % or mol % of the copolymer,wherein the glass transition temperature of the random copolymer is between 30°

    C. and 50°

    C.,wherein the scaffold pattern includes a plurality of undulating rings having crowns and longitudinally extending links connecting one ring to another adjacent ring, wherein the crowns include W-crowns, Y-crowns, and free crowns,wherein a first link connects a first ring to an adjacent ring, the first link forms with the first ring a W-crown, and the first link forms with the adjacent ring a Y-crown;

    wherein the first ring, the adjacent ring, and the first link forms repeating W-V closed cells, andwherein the W-V cells have three free crowns between the W-crown and a Y-crown.

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