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Woven prosthesis and method for manufacturing the same

  • US 10,682,221 B2
  • Filed: 06/20/2018
  • Issued: 06/16/2020
  • Est. Priority Date: 12/23/2010
  • Status: Active Grant
First Claim
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1. An implantable medical prosthesis configured as a generally tubular graft comprising:

  • a sidewall including a woven base comprising base warp yarns interwoven with weft yarn passes, at least a portion of the base warp yarns are woven in the warp direction to have a first frequency of interlacing, the woven base at least partially forming smaller and larger diameter portions of the prosthesis; and

    one or more velour yarns forming part of both the smaller and larger diameter portions and interwoven with the weft yarn passes to have in the warp direction a second frequency of interlacing that is smaller than the first frequency of interlacing;

    wherein in at least a portion of the larger diameter portion at least one of the one or more velour yarns that is interwoven with the weft yarn passes with the second frequency of interlacing is incorporated into the woven base and is interwoven with the weft yarn passes to have in the warp direction a frequency of interlacing that is larger than the second frequency of interlacing;

    wherein a spacing between the base warp yarns and the at least one of the one or more velour yarns in the woven base in the larger diameter portion is maintained approximately the same as a spacing between the base warp yarns in the smaller diameter portion so that porosity of the sidewall is uniform throughout;

    wherein a quantity of the base warp yarns and the one or more velour yarns is the same in the larger diameter portion as the smaller diameter portion; and

    wherein the medical prosthesis has been subjected to a sterilization procedure.

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