STENT WITH ANTI-MIGRATION FEATURE
First Claim
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1. An intraluminal prosthesis comprising:
- a radially expandable tubular stent structure having a length defining a longitudinal axis, the expandable tubular stent structure having an interior surface, an exterior surface, and a plurality of openings extending through the tubular stent structure from the interior surface to the exterior surface; and
a polymeric covering surrounding the tubular stent structure and covering the plurality of openings;
wherein the polymeric covering includes a plurality of projections extending radially outward from an outer surface of the polymeric covering, the plurality of projections configured to contact an inner surface of a body lumen to prevent migration of the prosthesis in the body lumen.
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Abstract
An intraluminal prosthesis includes an outer three-dimensional (3D) anti-migration structure that is attached to the outer wall of a fully covered or partially covered stent to prevent migration and still allow stent removal at a later period of time. A method of manufacturing the intraluminal prosthesis includes attaching the anti-migration structure by usage of a polymer such as polyurethane.
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Citations
20 Claims
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1. An intraluminal prosthesis comprising:
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a radially expandable tubular stent structure having a length defining a longitudinal axis, the expandable tubular stent structure having an interior surface, an exterior surface, and a plurality of openings extending through the tubular stent structure from the interior surface to the exterior surface; and a polymeric covering surrounding the tubular stent structure and covering the plurality of openings; wherein the polymeric covering includes a plurality of projections extending radially outward from an outer surface of the polymeric covering, the plurality of projections configured to contact an inner surface of a body lumen to prevent migration of the prosthesis in the body lumen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An intraluminal prosthesis comprising:
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a radially expandable tubular stent structure having a first end, a second end, and a length extending therebetween, the expandable tubular stent structure having an interior surface, an exterior surface, and a plurality of openings extending through the tubular stent structure from the interior surface to the exterior surface; and a polymeric covering surrounding the tubular stent structure and covering the plurality of openings, the polymeric covering extending along the entire length of the tubular stent structure; an adhesive layer disposed between the polymeric covering and the exterior surface of the tubular stent structure to attach the polymeric covering to the expandable tubular stent structure; wherein the polymeric covering is a preformed covering attached to the tubular stent structure with the adhesive layer subsequent to formation of the polymeric covering; wherein the polymeric covering includes a plurality of projections extending radially outward from an outer surface of the polymeric covering, the plurality of projections integrally formed with the polymeric covering, the plurality of projections configured to contact an inner surface of a body lumen to prevent migration of the prosthesis in the body lumen. - View Dependent Claims (16, 17, 18, 19)
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20. The intraluminal prosthesis of claim 25, wherein the plurality of projections are a plurality of beads spaced apart circumferentially around the tubular stent structure.
Specification