Expandable stent and method for delivery of same
First Claim
1. An unexpanded stent comprising:
- a plurality of radially-expandable circumferential struts, each circumferential strut having more than one sinusoidal cycle; and
a plurality of longitudinally-expandable longitudinal struts, each longitudinal strut having a sinusoidal cycle which is spaced apart from said circumferential struts, adjacent longitudinal struts being separated by less than one sinusoidal cycle of said circumferential strut.
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0 Petitions
Accused Products
Abstract
An expandable stent comprising a proximal end and a distal end in communication with one another and a tubular wall disposed between the proximal end and the distal end. The tubular wall has a longitudinal axis and a porous surface defined by a plurality of intersecting members comprising a series of longitudinal struts disposed substantially parallel to the longitudinal axis of the stent. Each longitudinal strut in the series comprises flexure means for substantially complementary extension and compression of a diametrically opposed pair of the longitudinal struts upon flexure of the stent. The stent is expandable from a first, contracted position to a second, expanded position upon the application of a radially outward force on the stent. The provision of such flexure means in the series of struts leads to a very desirable balance of lateral flexibility of the unexpanded stent and radial rigidity of the expanded stent.
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Citations
52 Claims
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1. An unexpanded stent comprising:
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a plurality of radially-expandable circumferential struts, each circumferential strut having more than one sinusoidal cycle; and
a plurality of longitudinally-expandable longitudinal struts, each longitudinal strut having a sinusoidal cycle which is spaced apart from said circumferential struts, adjacent longitudinal struts being separated by less than one sinusoidal cycle of said circumferential strut. - View Dependent Claims (2, 3, 4, 5)
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6. An unexpanded stent comprising:
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a plurality of S-shaped circumferential struts; and
a plurality of S-shaped longitudinal struts, each longitudinal strut having a sinusoidal cycle which is spaced apart from any circumferential strut; and
each circumferential strut having one complete sinusoidal cycle which is coupled to two radially adjacent longitudinal struts. - View Dependent Claims (7, 8, 9, 10)
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11. An unexpanded stent having a design which comprises a plurality of polygons, each polygon having:
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two longitudinally-extending side members, each side member comprising at least one sinusoidal cycle; and
two non-linear end members, each non-linear end member comprising less than one sinusoidal cycle, wherein each longitudinally-extending side member has a sinusoidal cycle which is spaced apart from said end members. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A stent comprising:
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a plurality of radially-expandable circumferential struts, each circumferential strut having more than one sinusoidal cycle; and
a plurality of longitudinally-disposed struts, each longitudinally-disposed strut having a sinusoidal cycle which is spaced apart from said circumferential struts, wherein the plurality of radially-expandable circumferential struts disposed between adjacent longitudinal struts comprises a first strut section and a second strut section each substantially oppositely angled with respect to a longitudinal axis of the stent to define an apex section. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A stent comprising:
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a plurality of undulating circumferential struts; and
a plurality of longitudinal struts, each longitudinal strut having a sinusoidal cycle which is spaced apart from any circumferential strut, the sinusoidal cycle comprising a first curved section and a second curved section, wherein the first curved section and the second curved section are of a different size. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41)
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42. A stent comprising:
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a plurality of undulating circumferential struts; and
a plurality of longitudinal struts, each longitudinal strut having a curved flex member which is spaced apart from any circumferential strut, the curved flex member comprising a first U-shaped section and a second U-shaped section;
wherein the first curved section and the second curved section are of a different size. - View Dependent Claims (43, 44, 45, 46, 47, 48)
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49. An unexpanded stent comprising:
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a plurality of circumferentially-disposed, radially-expandable rows of struts, each row of circumferentially-disposed struts comprising a plurality of first sinusoidal sections; and
a plurality of longitudinally-disposed, longitudinally-expandable rows of struts, each longitudinally-disposed strut comprising a curved second sinusoidal section, adjacent rows of circumferentially-disposed struts being interconnected by longitudinally-disposed struts, a complete cycle of the curved second sinusoidal section having a length less than a length between adjacent rows of circumferentially-disposed struts, adjacent longitudinally-disposed struts being spaced at a distance which is less than a length of a complete cycle of the first sinusoidal section;
wherein the second sinusoidal section comprises a start point and an end point which define a segment substantially parallel to a longitudinal axis of the stent. - View Dependent Claims (50, 51, 52)
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Specification