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Medical device fixation

  • US 10,173,069 B2
  • Filed: 08/15/2012
  • Issued: 01/08/2019
  • Est. Priority Date: 01/26/2012
  • Status: Active Grant
First Claim
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1. An implantable medical device (IMD) comprising:

  • a body containing electronics;

    a fixation device connected to the body of the device, wherein the fixation device comprises;

    a temporary fixation mechanism comprising a biodegradable material and configured to anchor the IMD within a blood vessel of a patient after implantation until the temporary fixation mechanism biodegrades; and

    a chronic fixation mechanism overlaying a first side of the body and configured to promote tissue growth along the first side of the body that anchors the IMD within the blood vessel of the patient before the temporary fixation mechanism biodegrades such that the chronic fixation mechanism is configured to more permanently anchor the IMD to the blood vessel than the temporary fixation mechanism,wherein the temporary fixation mechanism is configured to anchor the IMD within the blood vessel such that the first side of the body including the chronic fixation mechanism is arranged against endothelium of the blood vessel, andwherein the chronic fixation mechanism comprises a sheet of tissue growth promoting material configured to be connected to the IMD housing and configured to promote tissue growth into the material to secure the IMD within the blood vessel of the patient before the temporary fixation mechanism biodegrades, wherein the sheet of tissue growth promoting material comprises a rectangular sheet of tissue growth promoting material defined by four edges, and wherein a first edge is attached to the outer surface of the IMD housing and a second edge generally parallel to and offset from the first edge is attached to the outer surface of the IMD housing.

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