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Processes for making crush recoverable polymer scaffolds

  • US 9,345,602 B2
  • Filed: 04/19/2011
  • Issued: 05/24/2016
  • Est. Priority Date: 09/23/2010
  • Status: Active Grant
First Claim
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1. A method for making a medical device, comprising:

  • forming a scaffold from a tube made from a polymer having a glass transition temperature (Tg);

    crimping the scaffold to a balloon at a crimping temperature between about 1 to 20 degrees less than Tg, wherein the scaffold is plastically deformed to have a crimped state; and

    fitting a removable sheath over the scaffold and balloon following crimping to limit recoil of the crimped scaffold;

    wherein the scaffold has an expanded diameter when plastically deformed from the crimped state by the balloon; and

    wherein the scaffold attains greater than 90% of the expanded diameter after being crushed by an amount equal to at least 33% of the expanded diameter.

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