Bidirectional dual sinusoidal helix stent
First Claim
1. A radially expandable stent for implantation within a body vessel, comprising:
- a first wire formed winding having a hollow cylindrical shape, the first winding including a preformed sinusoidal wave form pattern, the first winding being wound into a continuous helix the length of the stent, the first winding having a proximal end, a distal end and an outer diameter;
a second wire formed winding having a hollow cylindrical shape, the winding including a preformed sinusoidal wave form pattern, the second winding being wound into a continuous helix the length of the stent, the second winding helix being opposite that of the first winding helix, the second winding having a proximal end, a distal end and an inner diameter, the second winding having a greater inner diameter than the outer diameter of the first winding, the second winding being coaxial with the first winding;
the proximal end of the first winding being attached to the proximal end of the second winding and the distal end of the first winding being attached to the distal end of the second winding; and
a means within the first winding to expand the first and second winding.
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Accused Products
Abstract
A method apparatus for a radially expandable stent for implantation within a body vessel, comprising a first wire formed winding and a second wire formed winding. The first wire formed winding has a hollow cylindrical shape including a preformed pattern such as a sinusoidal wave form and being wound into a continuous helix the length of the stent. The second wire formed winding has a hollow cylindrical shape including a preformed pattern such as a sinusoidal wave form and being wound into a continuous helix the length of the stent. The second winding helix is opposite that of the first winding helix. The second winding has a greater inner diameter than the outer diameter of the first winding. The second winding is coaxial with the first winding, the pattern of the first winding symmetrically intersects with the pattern of the second winding to form a uniform series of crossings thereby permitting even expansion of the first and second windings. The proximal end of the first winding may be attached to the proximal end of the second winding. The distal end of the first winding may be attached to the distal end of the second winding. An expandable member within the first winding to expand the first and second winding is included.
229 Citations
23 Claims
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1. A radially expandable stent for implantation within a body vessel, comprising:
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a first wire formed winding having a hollow cylindrical shape, the first winding including a preformed sinusoidal wave form pattern, the first winding being wound into a continuous helix the length of the stent, the first winding having a proximal end, a distal end and an outer diameter; a second wire formed winding having a hollow cylindrical shape, the winding including a preformed sinusoidal wave form pattern, the second winding being wound into a continuous helix the length of the stent, the second winding helix being opposite that of the first winding helix, the second winding having a proximal end, a distal end and an inner diameter, the second winding having a greater inner diameter than the outer diameter of the first winding, the second winding being coaxial with the first winding; the proximal end of the first winding being attached to the proximal end of the second winding and the distal end of the first winding being attached to the distal end of the second winding; and a means within the first winding to expand the first and second winding. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A radially expandable stent for imputation within a body vessel, comprising:
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a first wire formed winding having a hollow cylindrical shape, the first winding including a preformed sinusoidal wave form pattern, the first winding being wound into a continuous helix the length of the stent, the first winding having a proximal end, a distal end and an outer diameter; a second wire formed winding having a hollow cylindrical shape, the winding including a preformed sinusoidal wave form pattern, the second winding being wound into a continuous helix the length of the stent, the second winding helix being opposite that of the first winding helix, the second winding having a proximal end, a distal end and an inner diameter, the second winding having a greater inner diameter than the outer diameter of the first winding, the second winding being coaxial with the first winding; the sinusoidal wave form pattern of the first winding symmetrically intersecting with the sinusoidal wave form pattern of the second winding to form a uniform series of crossings thereby permitting even expansion of the first and second windings; the proximal end of the first winding being attached to the proximal end of the second winding and the distal end of the first winding being attached to the distal end of the second winding; and a means within the first winding to expand the first and second winding. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A radially expandable stent for implantation within a body vessel, comprising:
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a first wire formed winding having a hollow cylindrical shape, the first winding including a preformed sinusoidal wave form pattern, the first winding being wound into a continuous helix the length of the stent, the first winding having a proximal end, a distal end and an outer diameter; a second wire formed winding having a hollow cylindrical shape, the winding including a preformed sinusoidal wave form pattern, the second winding being wound into a continuous helix the length of the stent, the second winding helix being opposite that of the first winding helix, the second winding having a proximal end, a distal end and an inner diameter, the second winding having a greater inner diameter than the outer diameter of the first winding, the second winding being coaxial with the first winding; and a means within the first winding to expand the first and second winding.
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20. A method for making a stent body for implantation within a body vessel comprising:
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preforming a first wire into a sinusoidal wave pattern, the first wire having a proximal end and a distal end; preforming a second wire into a sinusoidal wave pattern, the second wire having a proximal end and a distal end; winding the preformed first wire on a cylindrical first mandrel such that the sinusoidal wave pattern is retained; winding the preformed second wire on a cylindrical second mandrel such that the sinusoidal wave pattern is retained, the second mandrel having a larger outer diameter than the first mandrel; removing the second wire from the second mandrel and sliding the second wire over the first wire; attaching the proximal end of the first winding to the proximal end of the second winding; and attaching the distal end of the first winding to the distal end of the second winding. - View Dependent Claims (21)
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22. A method for making a stent body for implantation within a body vessel comprising:
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preforming a first wire into a sinusoidal wave form pattern, the first wire having a proximal end and a distal end; preforming a second wire into a sinusoidal wave form pattern, the second wire having a proximal end and a distal end; winding the preformed first wire on a cylindrical first mandrel such that the sinusoidal wave pattern is retained; winding the preformed second wire on a cylindrical second mandrel such that the sinusoidal wave pattern is retained, the second mandrel having a larger outer diameter than the first mandrel; removing the second wire from the second mandrel and sliding the second wire over the first wire, the sinusoidal wave form pattern of the first winding symmetrically intersecting with the sinusoidal wave form pattern of the second winding to form a uniform series of crossings thereby permitting even expansion of the first and second windings; attaching the proximal end of the first winding to the proximal end of the second winding; and attaching the distal end of the first winding to the distal end of the second winding. - View Dependent Claims (23)
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Specification