STENT HAVING HELICAL ELEMENTS
First Claim
1. An expandable stent comprising:
- a generally cylindrically shaped main body having a cylindrical axis, the main body including;
a plurality of adjacent cylindrical elements having cylindrical axes collinear with the main body cylindrical axis,the cylindrical main body elements comprising a plurality of first expandable circumferential segments having a circumferential dimension; and
a plurality of second expandable circumferential segments having a circumferential dimension that is less than the first expandable segment circumferential dimension, each of the second expandable segments connected to two first expandable segments via substantially H-shaped connecting segments; and
wherein the substantially H-shaped connecting segments and second expandable circumferential segments of adjacent cylindrical main body elements form a plurality of generally parallel helixes.
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Accused Products
Abstract
An expandable stent comprised of a plurality of helical segments is disclosed. In one embodiment, the stent is generally cylindrical in shape having a cylindrical axis, and comprises a first and second set of helical segments. The helical segments in the first set are substantially parallel and have a first pitch forming a first helical angle with respect to the cylindrical axis. The helical segments in the second set are also generally parallel to each other and form a second pitch that differs from the first pitch, thereby forming a second helical angle with respect to the cylindrical axis. In an alternative embodiment, the stent comprises one set of helical segments and a plurality of circumferential elements that are joined together by the helical segments to form a plurality of cylindrical elements which are joined together to form a stent body. The stent may also have endzones.
106 Citations
20 Claims
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1. An expandable stent comprising:
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a generally cylindrically shaped main body having a cylindrical axis, the main body including; a plurality of adjacent cylindrical elements having cylindrical axes collinear with the main body cylindrical axis, the cylindrical main body elements comprising a plurality of first expandable circumferential segments having a circumferential dimension; and
a plurality of second expandable circumferential segments having a circumferential dimension that is less than the first expandable segment circumferential dimension, each of the second expandable segments connected to two first expandable segments via substantially H-shaped connecting segments; andwherein the substantially H-shaped connecting segments and second expandable circumferential segments of adjacent cylindrical main body elements form a plurality of generally parallel helixes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An expandable stent that, when in an unexpanded state, comprises:
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a cylindrical main body defining a cylindrical axis, the main body comprising;
a plurality of cylindrical elements having collinear cylindrical axes, the cylindrical elements being adjacent to one another and connected to one another by helical segments comprising expandable circumferential segments and substantially H-shaped connecting segments,wherein the helical segments comprise a plurality of first expandable helical segments having a first pitch and a plurality of second expandable helical segments having a second pitch different from the first pitch, and wherein the first helical segments cross the second helical segments and the first and second helical segments are attached to each other via substantially H-shaped connecting segments. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. An expandable stent comprising:
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a plurality of first expandable segments; a plurality of second expandable segments; a plurality of adjacent cylindrical elements having collinear cylindrical axes, the cylindrical main body elements formed by connecting first expandable segments with second expandable segments via substantially H-shaped connecting segments; a plurality of first helical segments having a pitch, the first helical segments formed by connecting first expandable segments from adjacent cylindrical elements with each other; and a plurality of second helical segments formed by connecting second expandable segments from adjacent cylindrical elements with each other, wherein the second helical segments have a pitch that differs from the pitch of the first helical segments. - View Dependent Claims (19, 20)
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Specification