Encapsulated stent preform
First Claim
1. A stent preform for implantation in a body lumen comprising:
- an elongated metal core having first and second core ends, a contact surface, and a solid cross-section; and
a hollow outer sheath made of a biocompatible polymer and having first and second sheath ends, caps disposed on the sheath ends, and an interior surface, wherein the outer sheath surrounds and contacts the contact surface of the core to prevent the core from directly contacting the body lumen.
1 Assignment
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Accused Products
Abstract
The invention relates to a stent preform for implantation in a body lumen. The stent preform includes an elongated metal core having first and second core ends, a contact surface, and a solid cross-section, and a hollow outer sheath made of a biocompatible polymer and having first and second sheath ends, caps disposed on the sheath ends, and an interior surface. The outer sheath surrounds and contacts the contact surface of the core to prevent the core from directly contacting the body lumen. In another embodiment, the biocompatible polymer of the outer sheath is formed of a heat-shrinkable polymer material, and the elongated core is formed of a shape-memory alloy. In another embodiment, the outer sheath is formed from a polymer tape.
11 Citations
29 Claims
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1. A stent preform for implantation in a body lumen comprising:
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an elongated metal core having first and second core ends, a contact surface, and a solid cross-section; and
a hollow outer sheath made of a biocompatible polymer and having first and second sheath ends, caps disposed on the sheath ends, and an interior surface, wherein the outer sheath surrounds and contacts the contact surface of the core to prevent the core from directly contacting the body lumen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A stent preform for implantation in a body lumen comprising:
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an elongated metal core having first and second core ends, a contact surface, and a solid cross-section;
at least one intermediate sleeve disposed between the outer sheath and the core; and
a hollow outer sheath made of a biocompatible polymer and having first and second sheath ends, caps disposed on the sheath ends, and an interior surface, wherein the outer sheath surrounds the intermediate sleeve and contact surface of the core to prevent the sleeve and core from directly contacting the body lumen. - View Dependent Claims (13, 14, 15)
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16. A filamentary member for implantation in a body lumen comprising:
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a rigid inner filament having first and second filament ends; and
an outer sheath having first and second sheath ends, wherein the outer sheath is made of a biocompatible polymer, and wherein the outer sheath completely encapsulates the inner filament to prevent the core from directly contacting a wall of a body lumen. - View Dependent Claims (17, 18)
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19. A method of making a stent preform comprising the steps of:
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providing an elongated core;
completely surrounding the core with a polymer jacket to create a composite;
heat treating the composite to promote bonding of the core and jacket; and
bending the composite to a desired shape. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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26. A method of making a stent preform comprising the steps of:
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providing an elongated metal core;
completely encapsulating the core with a polymer tape to create a composite; and
bending the composite to a desired shape. - View Dependent Claims (27)
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28. A method of making a stent preform comprising the steps of:
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providing an elongated core made of a shape-memory material;
completely encapsulating the core with a biocompatible fabric to create a composite; and
bending the composite to a desired shape. - View Dependent Claims (29)
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Specification