Intravascular stent
First Claim
Patent Images
1. A flexible intravascular stent for use in a body lumen, comprising:
- a plurality of cylindrical rings aligned along a common longitudinal axis and interconnected to form the stent, each cylindrical ring having a first delivery diameter and a second implanted diameter;
at least some of the cylindrical rings each having a plurality of first peaks and second peaks, each of the peaks having a height, the second peaks being shorter than the first peaks;
at least one undulating link attaching each cylindrical ring to an adjacent cylindrical ring, the undulating links having a width and a curved portion extending transverse to the stent longitudinal axis toward the second peak, the entire width of the curved portion having curvature along the length defining the curved portion;
the first peaks and the second peaks extending axially in the same direction and not being connected to an undulating link; and
at least one undulating link including a first arm which is substantially perpendicular to a longitudinal axis of the stent, the first arm being substantially straight and being connected to the curved portion, the at least one undulating link including a second arm having a first substantially straight portion which is substantially perpendicular to a longitudinal axis of the stent and a [second,] angled portion, the angled portion extending from the curved portion, wherein the angled portion of the second arm is adjacent to the second peak in the first delivery position and the entire width of the angled portion is substantially straight along the length defining the angled portion.
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Accused Products
Abstract
A stent design reduces the likelihood of contact among structural members when the stent diameter is reduced before insertion into the body. In one approach, an undulating link has a J-shaped profile or has an angled portion on one side at the peak of the link, in order to reduce contact during crimping. The stent may also include structural features that improve such aspects as flexibility, the coatibility of a drug coating onto the stent, flare reduction, stent retention within the body and/or reduction of the minimum diameter of the stent during crimping.
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Citations
42 Claims
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1. A flexible intravascular stent for use in a body lumen, comprising:
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a plurality of cylindrical rings aligned along a common longitudinal axis and interconnected to form the stent, each cylindrical ring having a first delivery diameter and a second implanted diameter; at least some of the cylindrical rings each having a plurality of first peaks and second peaks, each of the peaks having a height, the second peaks being shorter than the first peaks; at least one undulating link attaching each cylindrical ring to an adjacent cylindrical ring, the undulating links having a width and a curved portion extending transverse to the stent longitudinal axis toward the second peak, the entire width of the curved portion having curvature along the length defining the curved portion; the first peaks and the second peaks extending axially in the same direction and not being connected to an undulating link; and at least one undulating link including a first arm which is substantially perpendicular to a longitudinal axis of the stent, the first arm being substantially straight and being connected to the curved portion, the at least one undulating link including a second arm having a first substantially straight portion which is substantially perpendicular to a longitudinal axis of the stent and a [second,] angled portion, the angled portion extending from the curved portion, wherein the angled portion of the second arm is adjacent to the second peak in the first delivery position and the entire width of the angled portion is substantially straight along the length defining the angled portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 42)
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11. A flexible intravascular stent for use in a body lumen, comprising:
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a plurality of cylindrical rings aligned along a common longitudinal axis and interconnected to form the stent, each cylindrical ring having a first delivery diameter and a second implanted diameter; at least some of the cylindrical rings each having a plurality of first peaks and second peaks, each of the peaks having a height, the second peaks being shorter than the first peaks; at least one undulating link attaching each cylindrical ring to an adjacent cylindrical ring, each of the undulating links having a width and a curved portion extending transverse to the stent longitudinal axis toward the second peak, the height of the second peak being sized so that as the stent is compressed to the first delivery diameter, the curved portion of the undulating link is longitudinally aligned with the second peak and the entire width of the curved portion has curvature along the length defining the curved portion; the first peaks and the second peaks extending axially in the same direction and not being connected to an undulating link; and an angled portion extending from the curved portion and adjacent to the second peak, the angled portion thereby preventing contact between the at least one undulating link and the second peak when the stent is compressed to the first delivery diameter, the entire width of the angled portion being substantially straight along the length defining the angled portion. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A flexible intravascular stent for use in a body lumen, comprising:
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a plurality of cylindrical rings aligned along a common longitudinal axis and interconnected to form the stent, each cylindrical ring having a first delivery diameter and a second implanted diameter; at least some of the cylindrical rings each having a plurality of first peaks and second peaks, each of the peaks having a height, the second peaks being shorter than the first peaks; at least one undulating link attaching each cylindrical ring to an adjacent cylindrical ring, each of the undulating links having a width and a curved portion extending transverse to the stent longitudinal axis toward the second peak, the entire width of the curved portion having curvature along the length defining the curved portion; an angled portion extending from the curved portion and positioned adjacent the second peak in order to reduce the likelihood of metal-to-metal contact when the stent is in the delivery diameter configuration and the entire width of the angled portion is substantially straight along the length defining the angled portion; the first peaks and the second peaks extending axially in the same direction and not being connected to an undulating link; and an end ring having a plurality of first peaks and second peaks having a height, the height of the first and second peaks being uniform. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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Specification