Intraluminal stent
First Claim
1. A method of manufacturing an intraluminal stent having a body, the body having an outer surface and an inner surface, the method comprising steps of:
- forming the body with a film-forming material;
providing solid particulate material at least partially encapsulated in the body, the particulate material being soluble in a first solvent;
dissolving the particulate material with the first solvent, wherein a plurality of recesses are formed in the inner and outer surfaces of the body, and further wherein at least some of the plurality of recesses in the inner surface open into at least some of the plurality of recesses in the outer surface to form a plurality of passageways between the inner and outer surfaces of the body; and
coating at least the inner surface of the body with an antithrombotic substance, wherein at least some of the plurality of passageways remain open after the antithrombotic substance is coated on the body.
1 Assignment
0 Petitions
Accused Products
Abstract
Intraluminal stents and methods of manufacturing intraluminal stents are disclosed in which the stents have a plurality of recesses in the body of the stent, at least some of the recesses preferably providing a plurality of passageways between the inner and outer surfaces of the stent. The preferred stents are constructed of films on support structures having spaced apart elements, with the films having a thickness of between about 25 micrometers and about 400 micrometers. The stent can also be treated with an antithrombotic or a thrombolytic substance and, in some cases, the stents can incorporate therapeutic agents for delivery. The methods of manufacturing stents include forming the films using a solid particulate material that can be substantially removed after the film is formed, thereby forming the recesses and corresponding passageways described above. In preferred methods, the solid particulate material is soluble in a solvent in which the film is substantially insolvent.
235 Citations
24 Claims
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1. A method of manufacturing an intraluminal stent having a body, the body having an outer surface and an inner surface, the method comprising steps of:
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forming the body with a film-forming material; providing solid particulate material at least partially encapsulated in the body, the particulate material being soluble in a first solvent; dissolving the particulate material with the first solvent, wherein a plurality of recesses are formed in the inner and outer surfaces of the body, and further wherein at least some of the plurality of recesses in the inner surface open into at least some of the plurality of recesses in the outer surface to form a plurality of passageways between the inner and outer surfaces of the body; and coating at least the inner surface of the body with an antithrombotic substance, wherein at least some of the plurality of passageways remain open after the antithrombotic substance is coated on the body. - View Dependent Claims (2, 3, 4)
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5. A method of manufacturing an intraluminal stent having a body, the body having an outer surface and an inner surface, the method comprising steps of:
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coating at least a portion of a mandrel with solid particulate material, the particulate material being soluble in a first solvent; forming the body on the particulate-coated mandrel with a film-forming material that is substantially insoluble in the first solvent, the body at least partially encapsulating the particulate material; and dissolving the particulate material with the first solvent, wherein a plurality of recesses are formed in the body. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12)
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13. An intraluminal stent for supporting a portion of a vessel comprising:
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a support structure comprising spaced apart elements; a body having a generally cylindrical shape, the body comprising a film at least partially encapsulating the spaced apart elements, the film having a thickness of about 25 micrometers to about 400 micrometers as measured between an outer surface and an inner surface of the film; a plurality of recesses in the inner and outer surfaces of the body, at least some of the plurality of recesses in the inner surface opening into at least some of the plurality of recesses in the outer surface to form a plurality of passageways between the inner and outer surfaces of the body;
wherein the plurality of recesses have a nominal size of about 1 micrometer to about 100 micrometers; andan antithrombotic substance on at least the inner surface of the body, wherein at least some of the plurality of passageways remain open. - View Dependent Claims (14, 15)
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16. A method of manufacturing an intraluminal stent having a body, the body having an outer surface and an inner surface, the method comprising steps of:
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forming the body with a film-forming material; providing solid particulate material at least partially encapsulated in the body, the particulate material being soluble in a first solvent; dissolving the particulate material with the first solvent, wherein a plurality of open recesses are formed in the body; and coating the body with an antithrombotic substance such that at least some of the plurality of recesses remain open. - View Dependent Claims (17, 18, 19, 20, 21)
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22. A method of manufacturing an intraluminal stent having a body, the body having an outer surface and an inner surface, the method comprising steps of:
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forming a cylindrical body with a plurality of recesses in the inner surface and outer surface of the body wherein at least some of the plurality of recesses in the inner surface open into at least some of the plurality of recesses in the outer surface to form a plurality of passageways between the inner and outer surfaces of the body; and coating at least the inner surface of the body with an antithrombotic substance, wherein at least some of the plurality of passageways remain open after the antithrombotic substance is coated on the body. - View Dependent Claims (23, 24)
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Specification