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Devices and methods for the treatment of vascular defects

  • US 8,974,512 B2
  • Filed: 09/12/2011
  • Issued: 03/10/2015
  • Est. Priority Date: 09/10/2010
  • Status: Active Grant
First Claim
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1. An apparatus, comprising:

  • an expandable implant, configured to be deployed in a sac of an aneurysm, the expandable implant having a first portion and a second portion coupled to the first portion, the expandable implant being movable between a first configuration in which the first portion and the second portion are linearly aligned along an axis and a second configuration in which the second portion at least partially overlaps the first portion,wherein the first portion and the second portion are configured to assume a non-linear pre-determined configuration when deployed within the sac of the aneurysm and the expandable implant is in the second configuration, the first portion and the second portion collectively forming at least a portion of an outer boundary that defines an interior volume of the expandable implant when in the second configuration, at least the first portion or the second portion being completely offset from the axis in the second configuration,wherein the first portion and the second portion each have a concave surface and a convex surface, the convex surface of one of the first portion and the second portion being in apposition with the concave surface of the other of the first portion and the second portion when in the second configuration,a first porous portion havinga collapsed configuration for insertion through a blood vessel, wherein, in its collapsed configuration, the first porous portion has a first width and is symmetrical about a first porous portion axis, andan expanded configuration for occupying at least a portion of a sac of an aneurysm, wherein, in its expanded configuration, the first porous portion has a second width greater than the first width and is asymmetrical about the first porous portion axis; and

    a second porous portion coupled to the first porous portion, the second porous portion havinga collapsed configuration for insertion through the blood vessel, wherein, in its collapsed configuration, the second porous portion has a third width and is symmetrical about a second porous portion axis, andan expanded configuration for occupying at least a portion of the sac of the aneurysm, wherein, in its expanded configuration, the second porous portion has a fourth width greater than the third width and is asymmetrical about the second porous portion axis; and

    wherein the first porous portion and the second porous portion are configured to expand independently of each other; and

    wherein the first portion and the second portion are each formed of a flattened two-layer ribbon-shaped strand formed of tubular mesh material.

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