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Retrievability for implantable medical devices

  • US 10,328,272 B2
  • Filed: 05/08/2017
  • Issued: 06/25/2019
  • Est. Priority Date: 05/10/2016
  • Status: Active Grant
First Claim
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1. An implantable medical device (IMD), comprising:

  • an outer housing having a titanium outer surface;

    the titanium outer surface comprising a plurality of titanium atoms;

    a tissue growth-inhibiting layer extending over the titanium outer surface;

    the tissue growth-inhibiting layer comprising a plurality of polyethylene glycol molecules, at least some of the plurality of polyethylene glycol molecules covalently bonded via an ether bond to one of the plurality of titanium atoms; and

    wherein the tissue growth-inhibiting layer is formed by hydroxylating at least some of the plurality of titanium atoms and covalently bonding a plurality of hydroxyl-terminated polyethylene glycol molecules to the hydroxylated titanium atoms with a concomitant loss of water molecules.

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