Expandable stent forming projecting barbs and method for deploying
First Claim
1. A method for implanting an intraluminal graft and stent assembly in a body lumen where said stent has a plurality of cylindrical elements which are expandable in a radial direction and which are interconnected so as to be aligned on a common longitudinal axis, and said stent having a plurality of connecting members for interconnecting said cylindrical elements, where at least some of said connecting members have a notch so that as said cylindrical elements are radially expanded said connecting members having a notch buckle outwardly to form a plurality of projecting barbs, said graft having a pair of ends and said stent being attached to said graft on at least one of said ends to form said graft and stent assembly, the method comprising:
- providing a delivery catheter having an expandable member at a distal end;
mounting said graft and stent assembly on said expandable member of said catheter;
delivering said graft and stent assembly on said expandable member of said catheter percutaneously through the patient'"'"'s vasculature to a specific location in a body lumen;
expanding said expandable member and thereby expanding said graft and stent assembly radially outwardly into contact with the body lumen;
forming a plurality of projecting barbs by deforming the connecting members having a notch so that they buckle outwardly such that each notch forms the apex of said projecting barbs, said projecting barbs penetrating the body lumen; and
contracting said expandable member and withdrawing said catheter and said expandable member from the patient leaving said graft and stent assembly implanted in the body lumen.
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Abstract
An intraluminal stent for implanting in a body lumen in which a plurality of connecting members are deformed radially outwardly to form projecting barbs for attaching the stent to a body lumen. The stent has a first, unexpanded low profile diameter for intraluminal delivery, and a second, larger expanded diameter for implanting in a body lumen in which projecting barbs are formed and which penetrate the body lumen to assist in attaching the stent to the walls of the body lumen.
301 Citations
5 Claims
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1. A method for implanting an intraluminal graft and stent assembly in a body lumen where said stent has a plurality of cylindrical elements which are expandable in a radial direction and which are interconnected so as to be aligned on a common longitudinal axis, and said stent having a plurality of connecting members for interconnecting said cylindrical elements, where at least some of said connecting members have a notch so that as said cylindrical elements are radially expanded said connecting members having a notch buckle outwardly to form a plurality of projecting barbs, said graft having a pair of ends and said stent being attached to said graft on at least one of said ends to form said graft and stent assembly, the method comprising:
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providing a delivery catheter having an expandable member at a distal end; mounting said graft and stent assembly on said expandable member of said catheter; delivering said graft and stent assembly on said expandable member of said catheter percutaneously through the patient'"'"'s vasculature to a specific location in a body lumen; expanding said expandable member and thereby expanding said graft and stent assembly radially outwardly into contact with the body lumen; forming a plurality of projecting barbs by deforming the connecting members having a notch so that they buckle outwardly such that each notch forms the apex of said projecting barbs, said projecting barbs penetrating the body lumen; and contracting said expandable member and withdrawing said catheter and said expandable member from the patient leaving said graft and stent assembly implanted in the body lumen. - View Dependent Claims (2, 3, 4)
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5. An expandable intraluminal graft and stent assembly for implanting in a body lumen, comprising:
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a first stent section having a least one cylindrical element facing a first direction; a second stent section having a least one cylindrical element facing a second direction opposite to said first direction; a plurality of connecting members connecting said first section to said second section; a weakened portion in a least some of said connecting members, said connecting members being deformable at said weakened portion to provide a plurality of projecting barbs, wherein the overall length of the stent in its unexpanded and expanded configuration is substantially the same; and a tubular graft having a first end and a second end, a first stent being attached to said first end and a second stent being attached to said second end to form said graft and stent assembly for implanting in the body lumen.
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Specification