Intravascular hinge stent
First Claim
1. A tubular wall structure deliverable to the site of a lesion within a tubular vessel of the body, said tubular wall structure having a smaller nondeployed perimeter and capable of undergoing an expansion deformation to a larger deployed perimeter and being implanted within the tubular vessel in order to hold the wall of the tubular vessel outward, said tubular wall structure comprising;
- A. nodes and struts with each of said struts extending between two of said nodes, said struts being able to flex elastically in a radial direction and pivot with respect to said nodes but not flex in a uniform curved surface of said tubular wall structure, said struts having a strut radial dimension that is less than a strut width and a strut length that is greater than the strut width, B. each of said nodes having two or more hinges that are adapted to bend in the uniform curved surface of the tubular wall structure but not radially, said hinges having a hinge radial dimension that is greater than both a hinge width and the strut radial dimension, the hinge width being less than the strut width, and a hinge length being equal to or greater than the hinge width, C. each node having a hub, said hub having hinges attached thereto, said hub having a hub radial dimension that is equal to or greater than the hinge radial dimension, and a hub width that is equal to or greater than the hinge width, said hub not undergoing significant deformation during an expansion deformation, D. each of said hinges having a transition region that is unable to substantially flex in ether a radial direction or in the uniform curved surface of said tubular wall structure, said transition region having a transition region radial dimension that is greater than the strut radial dimension and a transition region width that is greater than the hinge width, whereby upon application of an external applied force said hinges provide an outward force to the uniform curved surface of said tubular wall structure to retain the larger deployed perimeter and the struts bend elastically in the radial direction to allow the uniform curved surface to form an oval shape.
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.
279 Citations
19 Claims
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1. A tubular wall structure deliverable to the site of a lesion within a tubular vessel of the body, said tubular wall structure having a smaller nondeployed perimeter and capable of undergoing an expansion deformation to a larger deployed perimeter and being implanted within the tubular vessel in order to hold the wall of the tubular vessel outward, said tubular wall structure comprising;
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A. nodes and struts with each of said struts extending between two of said nodes, said struts being able to flex elastically in a radial direction and pivot with respect to said nodes but not flex in a uniform curved surface of said tubular wall structure, said struts having a strut radial dimension that is less than a strut width and a strut length that is greater than the strut width, B. each of said nodes having two or more hinges that are adapted to bend in the uniform curved surface of the tubular wall structure but not radially, said hinges having a hinge radial dimension that is greater than both a hinge width and the strut radial dimension, the hinge width being less than the strut width, and a hinge length being equal to or greater than the hinge width, C. each node having a hub, said hub having hinges attached thereto, said hub having a hub radial dimension that is equal to or greater than the hinge radial dimension, and a hub width that is equal to or greater than the hinge width, said hub not undergoing significant deformation during an expansion deformation, D. each of said hinges having a transition region that is unable to substantially flex in ether a radial direction or in the uniform curved surface of said tubular wall structure, said transition region having a transition region radial dimension that is greater than the strut radial dimension and a transition region width that is greater than the hinge width, whereby upon application of an external applied force said hinges provide an outward force to the uniform curved surface of said tubular wall structure to retain the larger deployed perimeter and the struts bend elastically in the radial direction to allow the uniform curved surface to form an oval shape. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A tubular wall structure that is deliverable to the site of a lesion within a tubular vessel of the body, said tubular wall structure having a smaller nondeployed perimeter and capable of undergoing an expansion deformation to a larger deployed perimeter and be implanted within the tubular vessel in order to hold the wall of the tubular vessel outward, said tubular wall structure comprising;
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A. struts, hinges, and transition regions with each end of said struts being attached to a transition region, and each transition region being attached to a hinge, said struts being able to flex elastically in a radial direction and pivot with respect to said hinges but not flex in a uniform curved surface of said tubular wall structure, said struts having a strut radial dimension that is less than a strut width and a strut length that is greater than the strut width, B. each of said hinges being adapted to bend in the uniform curved surface of said tubular wall structure but not radially, said hinges having a hinge radial dimension that is greater than both a hinge width and the strut radial dimension, the hinge width being less than the strut width, and a hinge length being equal to or greater than the hinge width, C. said transition region being unable to substantially flex in ether a radial direction or in the uniform curved surface of said tubular wall structure, said transition region having a transition region radial dimension that is greater than the strut radial dimension and a transition region width that is greater than the hinge width.
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17. A tubular wall structure deliverable to the site of a lesion within a tubular vessel of the body, said tubular wall structure having a smaller nondeployed perimeter and capable of undergoing an expansion deformation to a larger deployed perimeter and being implanted within the tubular vessel in order to hold the wall of the tubular vessel outward, said tubular wall structure comprising;
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A. nodes and struts with each of said struts extending between two of said nodes, said struts being able to flex elastically in a radial direction and pivot with respect to said nodes but not flex in a uniform curved surface of said tubular wall structure, said struts having a strut radial dimension that is less than a strut width and a strut length ithat is greater than the strut width, B. each of said nodes having two or more hinges that are adapted to bend in the uniform curved surface of the tubular wall structure but not radially, said hinges having a hinge radial dimension that is greater than both a hinge width and the strut radial dimension, the hinge width being less than the strut width, and a hinge length being equal to or greater than the hinge width, C. each node having a hub, said hub having hinges attached thereto, said hub having a hub radial dimension that is equal to or greater than the hinge radial dimension, and a hub width that is equal to or greater than the hinge width, said hub not undergoing significant deformation during an expansion deformation.
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18. A tubular wall structure deliverable to the site of a lesion within a tubular vessel of the body, said tubular wall structure having a smaller nondeployed perimeter and capable of undergoing an expansion deformation to a larger deployed perimeter and being implanted within the tubular vessel in order to hold the wall of the tubular vessel outward, said tubular wall structure comprising;
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A. nodes and struts with each of said struts extending between two of said nodes, said struts being able to flex elastically in a radial direction and pivot with respect to said nodes but not flex in a uniform curved surface of said tubular wall structure, said struts having a strut radial dimension that is less than a strut width and a strut length that is greater than the strut width, B. each of said nodes having two or more hinges that are adapted to bend in the uniform curved surface of the tubular wall structure but not radially, said hinges having a hinge radial dimension that is greater than both a hinge width and the strut radial dimension, the hinge width being less than the strut width, and a hinge length being equal to or greater than the hinge width, C. each of said hinges having a transition region that is unable to substantially flex in ether a radial direction or in the uniform curved surface of said tubular wall structure, said transition region having a transition region radial dimension that is greater than the strut radial dimension and a transition region width that is greater than the hinge width.
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19. A tubular wall structure deliverable to the site of a lesion within a blood vessel of the body, said tubular wall structure having a smaller nondeployed perimeter and capable of undergoing an expansion to a larger deployed perimeter and being implanted within the blood vessel in order to hold the wall of the blood vessel outward, said tubular wall structure comprising;
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A. nodes and struts with each of said struts extending between two of said nodes, said struts being able to flex elastically in a radial direction and pivot with respect to said nodes but not flex in a uniform curved surface of said tubular wall structure, said struts having a strut radial dimension that is less than a strut width and a strut length that is greater than the strut width, B. each of said nodes having two or more hinges that are adapted to bend in the uniform curved surface of the tubular wall structure but not radially, said hinges having a hinge radial dimension that is greater than both a hinge width and the strut radial dimension, the hinge width being less than the strut width, and a hinge length being equal to or greater than the hinge width, C. each node having a hub that is attached to said hinges, said hub having a hub radial dimension that is equal to or greater than the hinge radial dimension, and a hub width that is equal to or greater than the hinge width, said hub being unable to substantially flex in either a radial direction or in the uniform curved surface of said tubular wall structure, D. each of said hinges having a transition region that is unable to substantially flex in ether a radial direction or in the uniform curved surface of said tubular wall structure, said transition region having a transition region radial dimension that is greater than the strut radial dimension and a transition region width that is greater than the hinge width.
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Specification