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Multi-component stent-graft system for aortic dissections

  • US 9,668,892 B2
  • Filed: 02/18/2014
  • Issued: 06/06/2017
  • Est. Priority Date: 03/11/2013
  • Status: Active Grant
First Claim
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1. Apparatus comprising a generally tubular stent-graft, which has distal and proximal stent-graft ends and comprises:

  • a generally tubular support element, which comprises a plurality of structural stent elements; and

    a covering element that is attached to and at least partially covers the support element,wherein when the stent-graft is unconstrained in a radially-expanded state;

    the covering element and the support element are shaped so as to together define a lateral fenestration having distal and proximal fenestration ends,a first perimeter of the distal stent-graft end equals at least 200% of a second perimeter of the proximal stent-graft end, andthe stent-graft includes a dissection-reinforcement axial portion, which (a) includes a portion of the structural stent elements, (b) has (i) a distal dissection-reinforcement end and (ii) a proximal dissection-reinforcement end that is disposed along the stent-graft no more than 20 mm proximal to the proximal fenestration end, (c) extends along the stent-graft for a distance, and (d) has a radial strength that is at least 10% greater than an average radial strength of the entire stent-graft, wherein the distance is equal to between 5% and 32% of a greatest perimeter of the stent-graft distally to the distal fenestration end.

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