Stent pattern with mirror image
First Claim
Patent Images
1. An intravascular stent for use in a body lumen, comprising:
- a plurality of cylindrical rings aligned along a longitudinal axis, each ring having a plurality of peaks and valleys, with the peaks and valleys formed by adjacent bar arms, including, generally linear bar arms and generally nonlinear bar arms; and
at least one link connecting each cylindrical ring to an adjacent ring to form the stent;
the nonlinear bar arms having an undulating member;
the linear bar arms having a first arm axis and the nonlinear bar arms having a second arm axis, with the first and second arm axes being at acute angles to each other; and
wherein the at least one link connects to a central portion of the nonlinear bar arm on one ring and a peak of the adjacent ring, and at least one peak connected to a nonlinear link being formed by a v-shaped bar arm, the v-shaped bar arm being disposed between the nonlinear bar arm and the linear bar arm, the v-shaped bar arm having a shorter longitudinal length than the longitudinal length of the linear bar arm.
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Accused Products
Abstract
An expandable stent for implanting in a body lumen, such as a coronary artery, peripheral artery, or other body lumen is provided. An intravascular stent is formed by cylindrical rings connected by links. The rings have peaks and valleys from which extend straight and nonlinear bar arms, forming a figure-eight. An elemental unit is defined with straight and nonlinear bar arms, and elemental units on adjacent rings are mirror images of one another. The links have one end connected at a peak of one ring and the other end connected to a central portion of a nonlinear bar arm. Alternating rows of the links consist of nonlinear links.
180 Citations
33 Claims
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1. An intravascular stent for use in a body lumen, comprising:
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a plurality of cylindrical rings aligned along a longitudinal axis, each ring having a plurality of peaks and valleys, with the peaks and valleys formed by adjacent bar arms, including, generally linear bar arms and generally nonlinear bar arms; and
at least one link connecting each cylindrical ring to an adjacent ring to form the stent;
the nonlinear bar arms having an undulating member;
the linear bar arms having a first arm axis and the nonlinear bar arms having a second arm axis, with the first and second arm axes being at acute angles to each other; and
wherein the at least one link connects to a central portion of the nonlinear bar arm on one ring and a peak of the adjacent ring, and at least one peak connected to a nonlinear link being formed by a v-shaped bar arm, the v-shaped bar arm being disposed between the nonlinear bar arm and the linear bar arm, the v-shaped bar arm having a shorter longitudinal length than the longitudinal length of the linear bar arm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An expandable endovascular prosthesis, comprising:
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a plurality of adjacent, expandable, undulating rings comprised of peaks and valleys, the peaks and valleys being formed by straight bar arms and nonlinear bar arms;
a plurality of links connecting adjacent rings, the links being connected to a central portion of the nonlinear bar arm on one ring and a peak of the adjacent ring;
wherein each ring comprises a plurality of elemental units, each elemental unit formed by one nonlinear bar arm in-between two straight bar arms;
wherein the elemental units of adjacent rings are mirror-images of one another; and
wherein at least one peak connected to a nonlinear link is formed by a v-shaped bar arm, and the v-shaped bar arm being connected to the adjacent nonlinear bar arm and the adjacent linear bar arm, the v-shaped bar arm having a shorter longitudinal length than the longitudinal length of the linear bar arm. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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23. A method for inserting an intravascular stent into a vascular lumen, the intravascular stent including a plurality of connected cylindrical rings, the cylindrical rings having peaks and valleys formed by linear and nonlinear bar arms, elemental units defined by one nonlinear bar arm and two linear bar arms, the elemental units of adjacent cylindrical rings mirror one another, and the rings being connected by links, the links being connected to a central portion of the nonlinear bar arm and a peak of the adjacent ring, wherein at least one peak connected to a nonlinear link is formed by a v-shaped-bar arm, the v-shaped bar arm being connected to the adjacent nonlinear bar arm and the adjacent linear bar arm, the v-shaped bar arm having a shorter longitudinal length than the longitudinal length of the linear bar arm, comprising:
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mounting the intravascular stent onto a catheter in an unexpanded configuration;
advancing the catheter in the vasculature to position the unexpanded intravascular stent in a desired location in the vascular lumen;
expanding the cylindrical rings of the intravascular stent radially outward;
implanting the intravascular stent in the vascular lumen; and
withdrawing the catheter from the vascular lumen. - View Dependent Claims (24)
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25. A method for forming a stent, the stent having a pattern, comprising:
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providing a stent pattern having a plurality of connected cylindrical rings, the cylindrical rings having peaks and valleys formed by linear and nonlinear bar arms, elemental units defined by one nonlinear bar arm and two linear bar arms, the elemental units of adjacent cylindrical rings mirror one another, and the rings being connected by links, the links being connected to a central portion of the nonlinear bar arm and a peak of the adjacent ring, wherein at least one peak connected to a nonlinear link is formed by a v-shaped bar arm, the v-shaped bar arm being connected to the adjacent nonlinear bar arm and the adjacent linear bar arm, the v-shaped bar arm having a shorter longitudinal length than the longitudinal length of the linear bar arm; and
laser cutting the stent pattern in a tube. - View Dependent Claims (26, 27)
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28. A method for forming a stent, the stent having a pattern comprising a plurality of connected cylindrical rings, the cylindrical rings having peaks and valleys formed by linear and nonlinear bar arms, elemental units defined by one nonlinear bar arm and two linear bar arms, the elemental units of adjacent cylindrical rings mirror one another, and the rings are connected by links, the links being connected to a central portion of the nonlinear bar arm and a peak of the adjacent ring, wherein at least one peak connected to a nonlinear link is formed by a v-shaped bar arm, the v-shaped bar arm being connected to the adjacent nonlinear bar arm and the adjacent linear bar arm, the v-shaped bar arm having a shorter longitudinal length than the longitudinal length of the linear bar arm, comprising:
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laser cutting the stent pattern in a flat metal sheet;
rolling the cut metal sheet into a tube; and
providing a longitudinal weld along the tube to form the stent. - View Dependent Claims (29, 30)
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31. An intravascular stent, comprising:
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a plurality of cylindrical rings, the cylindrical rings having elemental units defined by a nonlinear bar arm and two linear bar arms, the elemental units of adjacent cylindrical rings mirror one another;
means for connecting the plurality of cylindrical rings together, the means for connecting the plurality of cylindrical rings including at least one link between adjacent rings, the link being connected to a central portion of the nonlinear bar arm on one ring and a peak of the adjacent ring, and at least one peak connected to a nonlinear link being formed by a v-shaped bar arm, the v-shaped bar arm being disposed between the nonlinear bar arm and the linear bar arm, the v-shaped bar arm having a shorter longitudinal length than the longitudinal length of the linear bar arm, means for preventing catheter rotation during use; and
means for enhancing flexibility. - View Dependent Claims (32, 33)
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Specification