Intravascular hinge stent
First Claim
1. A wall structure for a tubular member that is deliverable to the site of a lesion within a tubular vessel of the body, the tubular member having a smaller nondeployed state with a nondeployed perimeter and capable of undergoing an expansion deformation to a larger deployed state with a deployed perimeter and being implanted within the tubular vessel in order to hold the wall of the tubular vessel outward, said wall structure comprised of;
- A. nodes and struts with each of said struts extending between two of said nodes, B. each of said nodes having at least one hinge, said hinge having a hinge radial dimension that is greater than the strut radial dimension wherein said hinge is unable to bend substantially in the radial direction and said struts flex elastically in the radial direction upon exposure to a deformation force that changes the radius of curvature of the tubular member.
1 Assignment
0 Petitions
Accused Products
Abstract
The hinge stent is a balloon-expandable or self-expandable intravascular endoprosthesis used for treatment of vascular injury. The hinge stent is formed of a single stent section or of multiple stent sections joined together. Each stent section has a node and strut structure extending throughout in order to uncouple expansion forces of the stent to hold a blood vessel outward from crush forces that resist the formation of an oval shape during a crush deformation. Each node includes a hinge which is joined via a transition region to a strut. The hinge can bend in the direction of a uniformly curved surface of the stent but not in the radial direction. The strut can bend in the radial direction but not in the uniformly curved surface of the stent. The widths, lengths, and radial dimensions of the hinges and struts provide a balloon-expandable hinge stent that is non-crushable. For a self-expandable stent the hinge and strut dimensions provide expansion forces that are controlled independently from crush forces. The hinge stent can be formed of a high modulus metal with expansion properties being determined by the hinge dimensions and crush properties being determined independently: by the design of the strut dimensions. The node and strut structure of the hinge stent provides for flexibility in traversing along tortuous passages.
281 Citations
25 Claims
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1. A wall structure for a tubular member that is deliverable to the site of a lesion within a tubular vessel of the body, the tubular member having a smaller nondeployed state with a nondeployed perimeter and capable of undergoing an expansion deformation to a larger deployed state with a deployed perimeter and being implanted within the tubular vessel in order to hold the wall of the tubular vessel outward, said wall structure comprised of;
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A. nodes and struts with each of said struts extending between two of said nodes, B. each of said nodes having at least one hinge, said hinge having a hinge radial dimension that is greater than the strut radial dimension wherein said hinge is unable to bend substantially in the radial direction and said struts flex elastically in the radial direction upon exposure to a deformation force that changes the radius of curvature of the tubular member. - View Dependent Claims (2)
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3. A wall structure for a tubular member that is deliverable to the site of a lesion within a tubular vessel of the body, the tubular member having a smaller nondeployed state with a nondeployed perimeter and capable of undergoing an expansion deformation to a larger deployed state with a deployed perimeter and being implanted within the tubular vessel in order to hold the wall of the tubular vessel outward, said wall structure comprised of;
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A. nodes and struts with each of said struts extending between two of said nodes, said nodes being comprised of at least one hinge and said nodes not bending substantially in a radial direction, B. said hinge having a hinge radial dimension which does not allow said hinge to bend substantially in a radial direction upon exposure to a deformation that changes the radius of curvature of the curved surface of said tubular member and a hinge width which allows said hinge to bend within the curved surface of said tubular member due to the expansion deformation, C. each of said struts having a strut width which does not allow said struts to bend substantially in a direction along the curved surface of the tubular member in the direction of the strut width and a strut radial dimension which allows said struts to bend elastically in the radial direction upon exposure to a deformation that changes the radius of curvature of said tubular member, whereby said wall structure provides an uncoupling of the expansion force of said hinge from the elastic radial bending force of said strut such that these forces can be varied independently from one another. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification