Marker device for rotationally orienting a stent delivery system prior to deploying a curved self-expanding stent
First Claim
1. A self-expanding stent and delivery system for deploying the self-expanding stent in a curved body lumen, comprising:
- a cylindrically-shaped self-expanding stent including a superelastic alloy, wherein the superelastic alloy includes a low temperature phase that induces a first shape to the stent, and a high temperature phase that isothermally induces a second shape with a bend along a length of the stent, wherein the bend substantially conforms to the curved body lumen;
a delivery sheath having a hollow interior at least partially containing the stent in the first shape;
a radiopaque pattern disposed in the delivery sheath, wherein the pattern includes a tubular shape affangement of rings interconnected by a spine;
wherein the stent is positioned in the delivery sheath so that the bend in the stent is oriented relative to the spine.
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0 Petitions
Accused Products
Abstract
A stent for use in a curved body lumen is disclosed. The stent is made from a superelastic alloy such as nickel titanium or nitinol, and optionally includes a ternary element. The superelastic alloy has a low temperature phase or martensitic phase and a high temperature phase or an austenitic phase. In the high temperature phase, the stent has a curve along the length that closely matches the curve of the vessel in the patient'"'"'s anatomy. When deployed in the curved vessel of the patient, the heat set curve of the stent closely conforms to the curvature in the vessel and minimizes trauma and stress to the vessel.
200 Citations
20 Claims
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1. A self-expanding stent and delivery system for deploying the self-expanding stent in a curved body lumen, comprising:
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a cylindrically-shaped self-expanding stent including a superelastic alloy, wherein the superelastic alloy includes a low temperature phase that induces a first shape to the stent, and a high temperature phase that isothermally induces a second shape with a bend along a length of the stent, wherein the bend substantially conforms to the curved body lumen;
a delivery sheath having a hollow interior at least partially containing the stent in the first shape;
a radiopaque pattern disposed in the delivery sheath, wherein the pattern includes a tubular shape affangement of rings interconnected by a spine;
wherein the stent is positioned in the delivery sheath so that the bend in the stent is oriented relative to the spine. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A self-expanding stent and delivery system for deploying the self-expanding stent in a curved body lumen, comprising:
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a cylindrically-shaped self-expanding stent including a superelastic alloy, wherein the superelastic alloy includes a low temperature phase that induces a first shape to the stent, and a high temperature phase that induces a second shape without application of heat and with at least one bend along a length of the stent, wherein the at least one bend substantially conforms to at least a curved section of the curved body lumen;
an elastic delivery sheath having a hollow interior at least partially restraining the stent in the first shape;
a flexible radiopaque pattern disposed in the delivery sheath, wherein the pattern includes a tubular shape arrangement of rings interconnected by a spine;
wherein the stent is held in the delivery sheath so that the bend in the stent is oriented relative to the spine. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A process for deploying a self-expanding stent in a curved body lumen with a delivery system, comprising:
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providing a cylindrically-shaped self-expanding stent including a superelastic alloy, wherein the superelastic alloy includes a low temperature phase that induces a first shape to the stent, and a high temperature phase that isothennally induces a second shape with a bend along a length of the stent, wherein the bend substantially conforms to the curved body lumen;
providing a delivery sheath having a hollow interior at least partially containing the stent in the first shape;
providing a radiopaque pattern in the delivery sheath, wherein the pattern includes a tubular shape arrangement of rings interconnected by a spine;
installing the stent in the first shape inside the delivery sheath;
positioning the stent in the delivery sheath so that the bend in the stent is oriented relative to the location of the spine. - View Dependent Claims (17, 18, 19, 20)
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Specification