Locking stent
First Claim
Patent Images
1. A stent, comprising:
- a plurality of spaced-apart components having opposed ends, said components capable of being rolled into a tubular shape, by overlapping one end on said other end on said plurality of components without any one end passing through its respective component and further comprising a locking assembly which allows said rolled components to expand to at least one predetermined dimension and to lock such position against recoil by locking overlapping ends;
at least one crosstie connecting said components.
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Abstract
The invention discloses a stent which has a locking feature to prevent recoil. The stent is composed of a plurality of rings which are joined by crossties of various construction. The locking feature of each ring can be in alignment or staggered. The crossties may be straight or angled or they may have curvature to them to further promote longitudinal flexibility. The locking mechanism includes features which minimize sharp ends exposed to the vascular wall.
202 Citations
34 Claims
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1. A stent, comprising:
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a plurality of spaced-apart components having opposed ends, said components capable of being rolled into a tubular shape, by overlapping one end on said other end on said plurality of components without any one end passing through its respective component and further comprising a locking assembly which allows said rolled components to expand to at least one predetermined dimension and to lock such position against recoil by locking overlapping ends; at least one crosstie connecting said components. - View Dependent Claims (2, 3, 4)
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5. A stent, comprising:
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a plurality of spaced-apart components capable of being rolled into a tubular shape, said plurality of components comprising a locking assembly which allows said rolled components to expand to at least one predetermined dimension and to lock such position against recoil by locking overlapping portions of said plurality of components; at least one crosstie connecting said components; said crosstie comprises a thin elongated member; and said crosstie comprises at least one bend. - View Dependent Claims (6, 7, 8)
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9. A stent comprising:
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a plurality of spaced-apart components capable of being rolled into a tubular shape, said plurality of components comprising a locking assembly which allows said rolled components to expand to at least one predetermined dimension and to lock such position against recoil by locking overlapping portions of said plurality of components; at least one crosstie connecting said components; said components comprise an enclosed wire shape having at least one transverse segment separating two substantially parallel segments and a tab portion opposite said transverse segment to complete said enclosed shape; and said tab comprising an undulation which, upon expansion of each said shape, brings said transverse member in locking engagement with at least one said undulation.
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10. A stent comprising:
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a plurality of spaced-apart components capable of being rolled into a tubular shape, said plurality of components comprising a locking assembly which allows said rolled components to expand to at least one predetermined dimension and to lock such position against recoil by locking overlapping portions of said plurality of components; at least one crosstie connecting said components; said components comprise an enclosed wire shape having at least one transverse segment separating two substantially parallel segments and a tab portion opposite said transverse segment to complete said enclosed shape; said tab comprises at least one rung; and said transverse segment comprises an extending member oriented inwardly or laterally with respect to said rolled up shape which upon expansion of said shape engages said rung.
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11. A stent comprising:
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a plurality of spaced-apart components capable of being rolled into a tubular shape, said plurality of components comprising a locking assembly which allows said rolled components to expand to at least one predetermined dimension and to lock such position against recoil by locking overlapping portions of said plurality of components; at least one crosstie connecting said components; said components comprise an enclosed wire shape having at least one transverse segment separating two substantially parallel segments and a tab portion opposite said transverse segment to complete said enclosed shape; said tab comprises at least one rung with an inwardly or laterally extending member when said shape is rolled; and said transverse member, upon expansion of said shape, engaging said extending member to prevent recoil.
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12. A stent comprising:
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a plurality of spaced-apart components capable of being rolled into a tubular shape, said plurality of components comprising a locking assembly which allows said rolled components to expand to at least one predetermined dimension and to lock such position against recoil by locking overlapping portions of said plurality of components; at least one crosstie connecting said components; and said locking assembly on one of said components is circumferentially offset from another of said components.
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13. A stent comprising:
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at least three spaced-apart components capable of being rolled into a tubular shape, said at least three components comprising a locking assembly which allows said rolled components to expand to at least one predetermined dimension and to lock such position against recoil by locking overlapping portions of said at least three components; at least one crosstie connecting said components; a plurality of crossties between said at least three components; and said crossties being aligned as between adjacent pairs of components.
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14. A stent comprising:
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at least three spaced-apart components capable of being rolled into a tubular shape, said at least three components comprising a locking assembly which allows said rolled components to expand to at least one predetermined dimension and to lock such position against recoil by locking overlapping portions of said at least three components; at least one crosstie connecting said components; a plurality of crossties between said at least three components; and said crossties being misaligned as between adjacent pairs of components.
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15. A stent comprising:
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at least three spaced-apart components capable of being rolled into a tubular shape, said at least three components comprising a locking assembly which allows said rolled components to expand to at least one predetermined dimension and to lock such position against recoil by locking overlapping portions of said at least three components; at least one crosstie connecting said components; a plurality of crossties between said at least three components; and said crossties are of different degrees of stiffness between any pair of components.
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16. A stent comprising:
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at least three spaced-apart components capable of being rolled into a tubular shape, said at least three components comprising a locking assembly which allows said rolled components to expand to at least one predetermined dimension and to lock such position against recoil by locking overlapping portions of said at least three components; at least one crosstie connecting said components; a plurality of crossties between said at least three components; and each of said crossties flexibly connects pairs of said components to allow relative movement in a plurality of directions. - View Dependent Claims (17)
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18. A stent comprising:
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a plurality of spaced-apart components capable of being rolled into a tubular shape, said plurality of components comprising a locking assembly which allows said rolled components to expand to at least one predetermined dimension and to lock such position against recoil by locking overlapping portions of said plurality of components; at least one crosstie connecting said components; said components comprise an enclosed wire shape having at least one transverse segment separating two substantially parallel segments and a tab portion opposite said transverse segment to complete said enclosed shape; and wherein said tab portion comprises at least one guide member extending into the space between said two substantially parallel members to act as a guide until a catch member, extending inwardly or laterally from said tab when said shape is rolled, rides over said transverse segment to lock said shape against recoil. - View Dependent Claims (19, 20)
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21. A stent comprising:
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a plurality of spaced-apart components capable of being rolled into a tubular shape, said plurality of components comprising a locking assembly which allows said rolled components to expand to at least one predetermined dimension and to lock such position against recoil by locking overlapping portions of said plurality of components; at least one crosstie connecting said components; said locking assembly further comprises a ratchet-type mechanism formed by overlapping ends of said plurality of rolled components; and said crosstie flexibly connects said components to allow relative movement therebetween in a plurality of directions. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification