Stent capable of attachment within a body lumen
First Claim
1. An expandable intraluminal stent implanted in a vessel, comprising:
- a body portion having a length and circumference formed from a substantially solid wall of biocompatible material;
a plurality of protrusions projecting along the length and circumference of said body portion;
a plurality of aperatures in said body portion, said aperatures being formed in said solid wall as a result of said plurality of protrusions being formed;
wherein some of said protrusions engage some of said apertures and several of said protrusions engage said vessel, to retain said intraluminal stent in said vessel.
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Accused Products
Abstract
An expandable, balloon catheter delivered intravascular stent, especially adapted for cardiovascular applications, having a plurality of protrusions on its outer surface for engaging the artery walls in which it is disposed. The protrusions are formed from the body of the stent in a unitary, one-piece manner. Apertures are formed in the stent body from the space vacated in the body by the material forming the protrusions. When the stent is expanded by the balloon catheter, the protrusions engage both the apertures and the artery walls, to lock the stent into the expanded diameter. In this way axial displacement and radial collapse of the stent is avoided. The protrusions are arranged in a plurality of shapes, sizes and patterns. The stent may be made of a bioabsorbable material and/or a therapeutic drug delivery material.
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Citations
34 Claims
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1. An expandable intraluminal stent implanted in a vessel, comprising:
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a body portion having a length and circumference formed from a substantially solid wall of biocompatible material; a plurality of protrusions projecting along the length and circumference of said body portion; a plurality of aperatures in said body portion, said aperatures being formed in said solid wall as a result of said plurality of protrusions being formed; wherein some of said protrusions engage some of said apertures and several of said protrusions engage said vessel, to retain said intraluminal stent in said vessel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 21)
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19. An intraluminal stent implantable in a body lumen, comprising:
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a sheet of material formed of a biocompatible material; said sheet curled into a cylinder having overlapping ends;
said cylindrical sheet having a length and a circumference;a plurality of protuberances projecting along the length and circumference of said sheet; a plurality of apertures in said sheet of materials, said apertures corresponding in shape to the shape of said protuberances;
said apertures being formed in said sheet as a result of said plurality of protuberances being formed whereby said cylinder is expanded from a first diameter to a second, enlarged diameter so that said protuberances engage said body lumen. - View Dependent Claims (20, 22, 23, 24, 25, 26)
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27. An expandable intraluminal stent implantable in a body lumen, adapted to expand from a reduced diameter form to an expanded diameter form, comprising:
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a sheet of biocompatible material curled into a cylinder having overlapping edges, an inner surface, and an exterior surface;
said apertures being formed in said sheet as a result of said plurality of protrusions being formedsaid exterior surface contiguous with said lumen, and said overlapping edges allowing contact between said exterior surface and said interior surface; said exterior surface having a surface texture made of a plurality of protrusions projecting along the length and circumference of said exterior surface; a plurality of apertures in said sheet of material, said apertures corresponding in shape to the shape of said protrusions said apertures being formed in said sheet as a result of said plurality of protrusions being formed; wherein said stent is held in said expanded diameter form to engage said lumen by combining said surface texture of said exterior surface engaging said inner surface and said surface texture of said exterior surface engaging said lumen. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34)
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Specification