Importance

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Abstract

A covered stent for use in a vessel, duct, lumen or hollow organ of a living being. The covered stent includes a stent or framework of interconnected elongated members in the form of a hollow tube having an inner surface and an outer surface. The stent may be a coiled stent, slotted tube stent, self-expanding stent, or any other intravascular stent design and may be metal or a polymer or a combination. A cover is disposed over a portion of the stent, either on the inside surface, the outside surface or intermediate those surfaces. The cover may be a polymer and may be resorbable. The cover can be attached to the stent by wrapping a sheet of polymer material around the stent, or forming a tube of polymer material and mounting it over the stent. The cover can extend over the entire stent or only a portion of the stent and may include one or more drugs or other beneficial active agents for delivery into the body of the being. Moreover, the cover may have properties to prevent permanent occlusion of a side-branch or bifurcation when placed within a branching or bifurcated vessel and may be constructed to selectively perforate or otherwise provide an opening to allow flow in a side-branch or bifurcated vessel.c

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First Claim