Self-expanding stent with enhanced radial expansion and shape memory
First Claim
1. A self-expanding stent comprising:
- a stent body in the shape of a tube and formed of a bioabsorbable material; and
an elastic member fixed to said stent body at first and second locations longitudinally displaced from each other along said stent body for exerting a radial expansion force in addition to a radial force of the stent body and to impart a memory into the stent;
wherein said elastic member is attached to said stent body by adhesive.
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Accused Products
Abstract
The invention comprises a bioabsorbable radially self-expanding stent with one or more supplemental apparatus or methods for achieving the desired final resting diameter of the stent by imparting memory into the bioabsorbable material components. The inventive apparatus and methods include increasing the radial expansion force of the stent through the use of a balloon within the stent delivery apparatus, substituting within the stent body one or more particularly rigid threads relative to the other threads, forming one or more of the helical threads of two side-by-side threads with one of the threads comprised of standard material and the other comprised of a more rigid material, attaching one or more bands to the stent body, and weaving circular or oval bands into the threads forming the wall of the stent shaped and positioned to resist axially elongation of the stent.
250 Citations
8 Claims
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1. A self-expanding stent comprising:
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a stent body in the shape of a tube and formed of a bioabsorbable material; and
an elastic member fixed to said stent body at first and second locations longitudinally displaced from each other along said stent body for exerting a radial expansion force in addition to a radial force of the stent body and to impart a memory into the stent;
wherein said elastic member is attached to said stent body by adhesive. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A self-expanding stent comprising:
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a stent body in the shape of a tube and formed of a bioabsorbable material;
means for exerting a radial expansion force in addition to the radial expansion force of the stent body and to impart memory into the stent body, wherein said means for exerting a radial expansion force is formed of a bioabsorbable material having a rate of bioabsorbtion that is faster than a rate of bioabsorbation of said bioabsorbable material of said stent body.
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Specification