Encapsulated stent preform
AssigneeIowa-India Investments Company Limited
InventorSwaminathan Jayaraman
Life of this patent
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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.
Claims29
A stent preform for implantation in a body lumen comprising:
- an elongated wireform 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 and the caps surround the core ends to prevent the core from directly contacting the body lumen.
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;
- 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;
- and
- at least one intermediate sleeve disposed between the outer sheath and the core,
- 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.
A filamentary member for implantation inside a body lumen comprising:
- a rigid, elongated wireform inner filament having first and second filament ends;
- and
- an outer sheath having first and second sheath ends and caps disposed on the sheath ends,
- wherein the outer sheath is made of a biocompatible polymer, and wherein the outer sheath completely encapsulates and contacts the inner filament and first and second filament ends to prevent the inner filament from directly contacting a wall inside a body lumen.
A method of making a stent preform comprising the steps of:
- providing an elongated wireform core with first and second ends;
- completely encapsulating and surrounding the core and ends with a polymer jacket to create a composite so that the polymer jacket forms caps at the ends;
- heat treating the composite to promote bonding of the core and jacket;
- and
- bending the composite to a desired shape.
A method of making a stent preform comprising the steps of:
- providing an elongated wireform metal core with first and second ends;
- completely encapsulating and surrounding the core and ends with a polymer tape to create a composite so that the polymer tape forms caps at the ends;
- and
- bending the composite to a desired shape.
A method of making a stent preform for implantation inside a body lumen comprising the steps of:
- providing an elongated wireform core with first and second ends, the core being made of a shape-memory material;
- completely encapsulating the core and ends with a biocompatible fabric to create a composite so that the biocompatible fabric caps the ends;
- and
- bending the composite to a desired shape.
A method of making a stent preform comprising the steps of:
- providing an elongated core made of a shape-memory material;
- completely encapsulating the core with a biocompatible fabric to create a composite;
- bending the composite to a desired shape;
- and
- providing at least one intermediate sleeve disposed between the biocompatible fabric and the core.
Dependencies are inferred from the claim text.