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Methods to increase fracture resistance of a drug-eluting medical device

  • US 9,656,002 B2
  • Filed: 10/15/2013
  • Issued: 05/23/2017
  • Est. Priority Date: 06/23/2009
  • Status: Active Grant
First Claim
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1. A method for making a medical device, comprising:

  • using a scaffold comprising a polymer; and

    using a crimping device, crimping the scaffold from a first diameter to a second diameter by plastic deformation of the scaffold whereinduring the crimping the scaffold has an elevated temperature of between 5 to 20 degrees below a glass transition temperature of the polymer,the scaffold is crimped to a balloon having a deployed diameter that is between 2 to 5 times the second diameter,the scaffold has a closed cell pattern formed by rings, wherein a ring comprises a first strut and a second strut adjoined at a hinge element, andthe first strut displaces more than 130 degrees relative to the second strut when the scaffold is crimped from the first diameter to the second diameter.

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