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Method and system of purifying polymers for use with implantable medical devices

  • US 7,645,474 B1
  • Filed: 07/31/2003
  • Issued: 01/12/2010
  • Est. Priority Date: 07/31/2003
  • Status: Expired due to Fees
First Claim
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1. A method of manufacturing an implantable medical device, comprising:

  • purifying a polymer by;

    introducing the polymer into an extruder;

    introducing a fluid into the extruder;

    mixing the fluid with the polymer;

    removing at least a volume of the fluid from the extruder such that an impurity is completely or at least partially removed with the fluid; and

    collecting the polymer after removal of the impurity; and

    coating an implantable medical device with the purified polymer, or fabricating the implantable medical device with the purified polymer;

    wherein the fluid is of a type to physically entrap the impurity without dissolving the impurity or the fluid is of a type to dissolve the impurity.

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