Stent with enhanced bendability and flexibility
First Claim
1. A stent for implanting in a body lumen, comprising:
- a plurality of adjacent cylindrical elements each having a circumference extending around a longitudinal stent axis and being substantially independently expandable in a radial direction, each cylindrical element being formed in a generally serpentine wave pattern transverse to the longitudinal axis of the stent; and
a plurality of interconnecting members extending between cylindrical elements to connect adjacent cylindrical elements, some of the interconnecting members having one or more bending points formed therein for promoting the bendabilty of the interconnecting member.
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Accused Products
Abstract
The invention is directed to an expandable self-expanding stent for implantation in a body lumen, such as an artery. The stent is made with a plurality of cylindrical elements which are interconnected by a plurality of interconnecting members which connect adjacent cylindrical elements, some of the interconnecting members have one or more bending points formed therein for promoting the bendability of the interconnecting member. The bending point can be formed by reducing the strut wall thickness of the interconnecting member to promote the bending of the strut or it can be formed by reducing the strut width of the interconnecting member, or a combination of both. The bending points on the interconnecting member enhances the bendability and flexibility of the composite stent device by creating mechanical hinges which help to bend the stent as it is delivered through the tortuous anatomy of the patient or conforms to a curved portion of a body vessel, where the stent may be implanted.
37 Citations
21 Claims
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1. A stent for implanting in a body lumen, comprising:
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a plurality of adjacent cylindrical elements each having a circumference extending around a longitudinal stent axis and being substantially independently expandable in a radial direction, each cylindrical element being formed in a generally serpentine wave pattern transverse to the longitudinal axis of the stent; and
a plurality of interconnecting members extending between cylindrical elements to connect adjacent cylindrical elements, some of the interconnecting members having one or more bending points formed therein for promoting the bendabilty of the interconnecting member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 14)
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11. A stent for implanting in a body lumen, comprising:
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a plurality of adjacent cylindrical elements each formed from a strut having a strut wall thickness and a strut wall width and being substantially independently expandable in a radial direction; and
a plurality of interconnecting members each formed from a strut having a strut wall thickness and a strut wall width and extending between adjacent cylindrical elements to connect adjacent cylindrical elements together, some of the interconnecting members having a plurality of bending points formed therein for promoting the bendability of the interconnecting member. - View Dependent Claims (12, 15, 16, 17, 19, 20, 21)
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13. The stent of claim 111, wherein:
each bending point is formed by weakening the strut forming the interconnecting member to allow the bending points to bend before the remainder of the strut bends once subjected to an external force.
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18. The stent of claim 111, wherein:
each interconnecting member has three bending points formed therein.
Specification