Non-migrating vascular prosthesis and minimally invasive placement system therefor
First Claim
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1. A vascular repair assembly adapted to inhibit migration of the assembly once it is positioned within a blood vessel, comprising:
- an elongate tubular graft having a proximal end and a distal end;
a fixed length self-expanding anchor having a proximal end, a distal end and an intermediate portion defined by a plurality of generally longitudinally extending curved anchor segments, the anchor being secured to the distal end of the graft, each of the anchor segments extending substantially the full length of the anchor;
the curve of the anchor segments being oriented radially outwardly toward each of the proximal and distal ends of the anchor so that both the distal and proximal ends of the anchor define diameters greater than that of the intermediate portion.
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Abstract
A graft assembly for securely position a graft at a predetermined location across an abdominal aortic aneurysm. The assembly includes a resilient self expanding anchor that is secured to the distal end of a mesh graft. The anchor is formed from a single wire having a series of zigzag bends, such that when the ends of the wire are attached a tubular anchor is produced. The anchor is further characterized by curved segments between the bends which a create an anchor having a reverse barrel shape.
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Citations
21 Claims
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1. A vascular repair assembly adapted to inhibit migration of the assembly once it is positioned within a blood vessel, comprising:
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an elongate tubular graft having a proximal end and a distal end; a fixed length self-expanding anchor having a proximal end, a distal end and an intermediate portion defined by a plurality of generally longitudinally extending curved anchor segments, the anchor being secured to the distal end of the graft, each of the anchor segments extending substantially the full length of the anchor; the curve of the anchor segments being oriented radially outwardly toward each of the proximal and distal ends of the anchor so that both the distal and proximal ends of the anchor define diameters greater than that of the intermediate portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 21)
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13. A method for repairing injured blood vessels comprising the steps of:
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attaching a self expanding anchor to a distal end of a graft; positioning said anchor and said graft at a predetermined location within a blood vessel; and securing said anchor within said blood vessel such that migration of said graft is prevented; wherein said anchor comprises; a generally tubular fixed length structure formed from a plurality of fixed length radially outwardly curved anchor segments which extend from the proximal end of said anchor to the distal end of said anchor, the proximal and distal ends of the anchor defining a plurality of circumferentially spaced anchor regions disposed about circles, each of which has a greater diameter than the diameter defined by the midportion of the anchor as the result of the curvature of the anchor segments, the number of the circumferentially spaced anchor regions being selected to focus the radially outward pressure applied by the self expanding anchor against the blood vessel wall to a small number of points along the circle. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A repair assembly for placement in a patient'"'"'s vascular system comprising:
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a graft having a proximal end, a distal end and a generally tubular shape, said graft having at least one hole through a sidewall proximate to the distal end; a self expanding anchor having a body and at least one hook segment extending from said body at a first location; wherein said at least one hook segment extends through said hole in said graft and along the graft toward the distal end so that said distal end and a portion of said sidewall of said graft are captured between said hook segment and said body; wherein said at least one hook segment is attached to said body at a second location so that said distal end and a portion of said sidewall are positioned between said first and second attachment locations.
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Specification