Intravascular folded tubular endoprosthesis
First Claim
1. An attachment anchor for holding an intravascular tubular member outward within a blood vessel, said attachment anchor being deliverable in the nondeployed state with a smaller nondeployed diameter and able to expand to a deployed state with a larger deployed diameter and a deployed perimeter, said attachment anchor having a curved surface, said attachment anchor comprising;
- A nodes and struts connected to each other to form a ring structure, said nodes being comprised of at least one hinge, B said hinge having a hinge width less than a hinge radial dimension which allows said hinge to bend only in a direction substantially along the curved surface of said attachment anchor, C said strut having a strut radial dimension that is less than a strut width and providing said strut with an ability to deform only in substantially the radial direction with substantially an elastic deformation due to an external crush force that deforms said attachment anchor to an oval shape while retaining a deployed perimeter, D said hinge having a hinge radial dimension of adequate magnitude such that the forces transmitted to said hinges by said struts are unable to cause said hinges to bend substantially in the radial direction while said attachment anchor forms an oval shape due to exposure to an externally applied crush force, E each of said struts having a strut width of adequate magnitude such that the forces transmitted to said struts by said hinges are unable to cause said struts to bend in the curved surface during an expansion of said attachment anchor, whereby said attachment anchor provides an uncoupling of the expansion force associated with said hinge from the elastic radial bending force of said strut generated from the crushing deformation of said attachment anchor to an oval shape such that these forces can be varied independently from one another by adjusting the radial dimensions and widths of said hinges and struts as described herein.
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Accused Products
Abstract
A bifurcated or straight intravascular folded tubular member is deliverable percutaneously or by small cutdown to the site of a vascular lesion. Its inserted state has a smaller nondeployed diameter and a shorter nondeployed length. The intravascular tubular member has a folded tubular section that is unfolded following insertion into the blood vessel. The length of the intravascular folded tubular member is sized in situ to the length of the vessel lesion without error associated with diagnostic estimation of lesion length. The folded tubular member is self-expandable or balloon-expandable to a larger deployed diameter following delivery to the lesion site. An attachment anchor can be positioned at the inlet or outlet ends of the intravascular folded tubular member to prevent leakage between the tubular member and the native vessel lumen and to prevent migration of the tubular member. The attachment anchor has a short axial length to provide a more focal line of attachment to the vessel wall. Such attachment is valuable in attaching to a short aortic neck in the treatment of abdominal aortic aneurysm. The attachment anchor can have barbs which are held in a protected conformation during insertion of the tubular member and are released upon deployment of the attachment anchor. The intravascular tubular member can be formed of woven multifilament polymeric strands with metallic strands interwoven along with them. Double weaving is incorporated to prevent leakage at crossover points.
189 Citations
20 Claims
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1. An attachment anchor for holding an intravascular tubular member outward within a blood vessel, said attachment anchor being deliverable in the nondeployed state with a smaller nondeployed diameter and able to expand to a deployed state with a larger deployed diameter and a deployed perimeter, said attachment anchor having a curved surface, said attachment anchor comprising;
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A nodes and struts connected to each other to form a ring structure, said nodes being comprised of at least one hinge, B said hinge having a hinge width less than a hinge radial dimension which allows said hinge to bend only in a direction substantially along the curved surface of said attachment anchor, C said strut having a strut radial dimension that is less than a strut width and providing said strut with an ability to deform only in substantially the radial direction with substantially an elastic deformation due to an external crush force that deforms said attachment anchor to an oval shape while retaining a deployed perimeter, D said hinge having a hinge radial dimension of adequate magnitude such that the forces transmitted to said hinges by said struts are unable to cause said hinges to bend substantially in the radial direction while said attachment anchor forms an oval shape due to exposure to an externally applied crush force, E each of said struts having a strut width of adequate magnitude such that the forces transmitted to said struts by said hinges are unable to cause said struts to bend in the curved surface during an expansion of said attachment anchor, whereby said attachment anchor provides an uncoupling of the expansion force associated with said hinge from the elastic radial bending force of said strut generated from the crushing deformation of said attachment anchor to an oval shape such that these forces can be varied independently from one another by adjusting the radial dimensions and widths of said hinges and struts as described herein. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An attachment anchor for holding an intravascular tubular member outward within a blood vessel, said attachment anchor being deliverable in the nondeployed state with a smaller nondeployed diameter and able to expand to a deployed state with a larger deployed diameter and a deployed perimeter, said attachment anchor having a curved surface, said attachment anchor comprising;
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A. hinges and struts connected to each other to form a ring structure, B. a hinge width less than a hinge radial dimension which allows said hinge to bend substantially in a direction along the curved surface of said attachment anchor, C. said strut having a strut radial dimension less than a strut width and providing said strut with an ability to deform substantially in the radial direction and with substantially elastic deformation due to an external crush force that deforms said attachment anchor to an oval shape with a deployed perimeter, D. said hinge having a hinge radial dimension of sufficient dimension such that the forces transferred to said hinges by said struts are unable to cause said hinges to bend substantially in the radial direction while forming an oval shape due to exposure of said attachment anchor to an externally applied crush force, E. each of said struts having a strut width of sufficient dimension such that said the forces transferred to said struts by said hinges are unable to cause said struts to bend substantially in the curved surface during an expansion of said attachment anchor, whereby said attachment anchor provides an uncoupling of the expansion force of said hinge from the elastic radial bending force of said strut generated from a crushing deformation of said attachment anchor to an oval shape such that these forces can be varied independently from one another.
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18. The method of use for an attachment anchor for holding an intravascular tubular member outward within a blood vessel, said attachment anchor being deliverable in the nondeployed state with a smaller nondeployed diameter and able to expand to a deployed state with a larger deployed diameter and a deployed perimeter for implantation, said method comprising;
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A. providing an attachment anchor having nodes and struts connected to each other to form a ring structure, said nodes being comprised of at least one hinge, said hinge having a hinge width less than a hinge radial dimension which allows said hinge to bend only in a direction along the curved surface of said attachment anchor, said strut having a strut radial dimension that provides said strut with an ability to only deform in the radial direction with substantially an elastic deformation due to an external crush force that deforms said attachment anchor to an oval shape in a deployed state, said hinge having a hinge radial dimension of adequate magnitude such that the forces transferred to said hinges by said struts is unable to cause said hinges to bend substantially in the radial direction while forming an oval shape due to exposure of said attachment anchor to an externally applied crush force, each of said struts having a strut width of adequate magnitude such that the forces transferred to said struts by said hinges is unable to cause said struts to bend substantially in the curved surface during an expansion of said attachment anchor, B. expanding the attachment anchor whereby said hinges provide an outward force to hold said intravascular tubular member outward in a deployed state and said struts pivot on said hinge during the expansion, C. elastically deforming said struts in a radial direction as said attachment anchor is formed into an oval shape with a deployed perimeter due to exposure to external crush forces. - View Dependent Claims (19, 20)
A. releasing at least one barb attached to at least one of said nodes as said attachment anchor undergoes an expansion, the release of said barb and extension of said barb to substantially its fullest extent occurring intermediate between the nondeployed state and the fully deployed state of said attachment anchor.
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Specification