Prosthetic repair of body passages
First Claim
1. A prosthetic device for implantation in a body passage comprising a first prosthesis including a bifurcated graft having at least a free end and a longitudinal axis, and an annular resilient element comprising windings formed of a strand of wire, said windings located at said free end and transverse to said longitudinal axis, a portion of a surface of one winding wrapped around a portion of a surface of another winding to form two circles that are concentric and overlapping such that one of said circles has a larger radius than another of said circles, said windings connected together to form a bundle, the diameter of said bundle of windings corresponding with the diameter of said annular element, wherein said annular element is adapted to be situated inside a body passage in a c-shaped deformed configuration folded about the diametric axis of said circles.
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Abstract
A prosthesis that resiliently engages a body passage includes an annular clamping ring which may be folded along a diametric axis for insertion into the body passage. The clamping ring is adapted to resiliently spring outwardly, once in position inside the body passage, and to be continually resiliently biased against the interior surface of the body passage. One or more of the clamping rings may be attached to opposed ends of a tubular graft. The rings and connected graft may be positioned in the body passage using a applicator which selectively permits expansion and/or in some embodiments contraction of the annular ring in position within a body passage. Alternatively a retaining member may be used to retain the annular ring in a compressed condition until it is in a desired position within a body passage. Among other potential uses, the present invention may be useful as a vascular stent for treating abdominal aortic aneurysms.
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Citations
14 Claims
- 1. A prosthetic device for implantation in a body passage comprising a first prosthesis including a bifurcated graft having at least a free end and a longitudinal axis, and an annular resilient element comprising windings formed of a strand of wire, said windings located at said free end and transverse to said longitudinal axis, a portion of a surface of one winding wrapped around a portion of a surface of another winding to form two circles that are concentric and overlapping such that one of said circles has a larger radius than another of said circles, said windings connected together to form a bundle, the diameter of said bundle of windings corresponding with the diameter of said annular element, wherein said annular element is adapted to be situated inside a body passage in a c-shaped deformed configuration folded about the diametric axis of said circles.
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9. A prosthetic device comprising:
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a first prosthesis having a resiliently deformable annular element and a bifurcated graft having a longitudinal axis, said annular element connected to a free end of said bifurcated graft and transverse to said longitudinal axis, said annular element comprising concentric and radially overlapping windings that have at least two different radii, said windings formed of a strand of wire and connected together to form a bundle of windings having a substantially circular cross-section, wherein said annular element is adapted to be situated inside a body passage in a c-shaped deformed configuration folded about a diametric axis of said annular element; and a second prosthesis having a resiliently deformable annular member and a tubular graft, said annular member thereof adapted to engage with an internal surface of said first prosthesis. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification