Drug-eluting stent cover method of use
First Claim
1. A method for treating a body lumen with a drug-delivery stent assembly, comprising:
- providing a pattern of struts interconnected to form a stent structure that contacts the wall of a body lumen to maintain the patency of the lumen;
attaching a stent cover having a delivery sheath fabricated from a mesh to at least a portion of an outside surface area of the stent structure to form the stent assembly;
loading the delivery sheath with at least one therapeutic agent for the release thereof in the body lumen;
intraluminally delivering the stent assembly in the body lumen;
providing a radially outward directed force to the stent cover; and
plastically deforming at least a portion of the stent cover in response to the radially outward directed force so that the deformed portions neck down or break thereby providing less resistance to expansion of the stent assembly, wherein the stent cover is attached to the stent structure at a stent structure distal end and a stent structure proximal end so that the stent cover is free to stretch in a mid-cover section as the stent expands.
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Accused Products
Abstract
An intravascular stent includes an eluting sheath fabricated from a mesh for controlled release of therapeutic drugs and for delivery of the therapeutic drugs in localized drug therapy in a blood vessel. The eluting sheath is attached to at least a portion of an outside surface area of the stent structure and is fabricated from a mesh designed to neck down in response to a radially outward directed force resulting in the uniform expansion of the stent. The eluting sheath can be loaded with at least one therapeutic drug for the release thereof at a treatment site to facilitate repair of a damaged vessel. The stent has a high degree of flexibility in the longitudinal direction, yet has adequate vessel wall coverage and radial strength sufficient to hold open an artery or other body lumen.
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Citations
24 Claims
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1. A method for treating a body lumen with a drug-delivery stent assembly, comprising:
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providing a pattern of struts interconnected to form a stent structure that contacts the wall of a body lumen to maintain the patency of the lumen; attaching a stent cover having a delivery sheath fabricated from a mesh to at least a portion of an outside surface area of the stent structure to form the stent assembly; loading the delivery sheath with at least one therapeutic agent for the release thereof in the body lumen; intraluminally delivering the stent assembly in the body lumen; providing a radially outward directed force to the stent cover; and plastically deforming at least a portion of the stent cover in response to the radially outward directed force so that the deformed portions neck down or break thereby providing less resistance to expansion of the stent assembly, wherein the stent cover is attached to the stent structure at a stent structure distal end and a stent structure proximal end so that the stent cover is free to stretch in a mid-cover section as the stent expands. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for treating a body lumen with a drug-delivery stent assembly, comprising:
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providing a pattern of struts interconnected to form a stent structure that contacts the wall of a body lumen to maintain the patency of the lumen; attaching a stent cover having a delivery sheath fabricated from a mesh to at least a portion of an outside surface area of the stent structure to form the stent assembly; loading the delivery sheath with at least one therapeutic agent for the release thereof in the body lumen; intraluminally delivering the stent assembly in the body lumen; providing a radially outward directed force to the stent cover; and plastically deforming at least a portion of the stent cover in response to the radially outward directed force so that the deformed portions neck down or break thereby providing less resistance to expansion of the stent assembly, wherein the therapeutic agent loading range is about 30 to 60 percent by weight. - View Dependent Claims (20)
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21. A method for treating a body lumen with a drug-delivery stent assembly, comprising:
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providing a pattern of struts interconnected to form a stent structure that contacts the wall of a body lumen to maintain the patency of the lumen; attaching a stent cover having a delivery sheath fabricated from a mesh to at least a portion of an outside surface area of the stent structure to form the stent assembly; loading the delivery sheath with at least one therapeutic agent for the release thereof in the body lumen; intraluminally delivering the stent assembly in the body lumen; providing a radially outward directed force to the stent cover; and plastically deforming at least a portion of the stent cover in response to the radially outward directed force so that the deformed portions neck down or break thereby providing less resistance to expansion of the stent assembly, wherein the mesh stent cover is configured to neck down in response to a stent structure expansion of at least 400 percent. - View Dependent Claims (22)
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23. A method for treating a body lumen with a drug-delivery stent assembly, comprising:
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providing a pattern of struts interconnected to form a stent structure that contacts the wall of a body lumen to maintain the patency of the lumen; attaching a stent cover having a delivery sheath fabricated from a mesh to at least a portion of an outside surface area of the stent structure to form the stent assembly; loading the delivery sheath with at least one therapeutic agent for the release thereof in the body lumen; intraluminally delivering the stent assembly in the body lumen; providing a radially outward directed force to the stent cover; and plastically deforming at least a portion of the stent cover in response to the radially outward directed force so that the deformed portions neck down or break thereby providing less resistance to expansion of the stent assembly, wherein the stent cover is attached to the stent structure by laser bonding.
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24. A method for treating a body lumen with a drug-delivery stent assembly, comprising:
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providing a pattern of struts interconnected to form a stent structure that contacts the wall of a body lumen to maintain the patency of the lumen; attaching a stent cover having a delivery sheath fabricated from a mesh to at least a portion of an outside surface area of the stent structure to form the stent assembly; loading the delivery sheath with at least one therapeutic agent for the release thereof in the body lumen; intraluminally delivering the stent assembly in the body lumen; providing a radially outward directed force to the stent cover; and plastically deforming at least a portion of the stent cover in response to the radially outward directed force so that the deformed portions neck down or break thereby providing less resistance to expansion of the stent assembly, wherein the stent cover is made using at least one polymeric process consisting of injection molding, laser cutting, and slip casting.
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Specification