Prosthetic device for sustaining a blood-vessel or hollow organ lumen
First Claim
1. A prosthetic device for sustaining a vessel or hollow organ lumen, comprising:
- a flexible, tubular shaped frame (1) of separate first and second helical wires forming flexibly interconnected cells (2), each of the cells including first and second U-shaped sections (3) forming together an approximately elongated oval with a larger axis and a smaller axis, wherein the larger axis of the oval is directed in a circumferential direction of the tubular shaped frame and the smaller axis is directed in a direction parallel to a longitudinal axis of the tubular shaped frame, and wherein in a plane substantially perpendicular to the longitudinal axis of the tubular frame, one branch of each U-shaped wire section in one row together form a closed ring shape.
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Accused Products
Abstract
A prosthetic device for sustaining a vessel or hollow organ lumen (a stent) has a tubular wire frame (1) with rows of elongate cells (2) having a larger axis and a smaller axis. The cells are arranged with the larger axis in the circumferential direction of the frame (2) and the smaller axis parallel to the axial direction thereof. Each cell is formed by two U-shaped wire sections, and in a plane perpendicular to the longitudinal axis one of the branches of the U-shaped wire sections in one row form together a closed ring-shape (4) which provides the frame (1) with large radial stiffness. In the axial direction the frame (1) has only low stiffness so that it easily conforms to the vascular wall even if this deforms due to external loads. The interconnection between the cells (2) may be flexible.
210 Citations
20 Claims
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1. A prosthetic device for sustaining a vessel or hollow organ lumen, comprising:
a flexible, tubular shaped frame (1) of separate first and second helical wires forming flexibly interconnected cells (2), each of the cells including first and second U-shaped sections (3) forming together an approximately elongated oval with a larger axis and a smaller axis, wherein the larger axis of the oval is directed in a circumferential direction of the tubular shaped frame and the smaller axis is directed in a direction parallel to a longitudinal axis of the tubular shaped frame, and wherein in a plane substantially perpendicular to the longitudinal axis of the tubular frame, one branch of each U-shaped wire section in one row together form a closed ring shape. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A prosthetic device for sustaining a vessel or hollow organ lumen, comprising:
a wire frame (1) having a flexible tubular shaped body with rows of interconnected cells (2), the flexible tubular shaped body having a reduced diameter during introduction through a tube or a delivery catheter, each of the cells having two U-shaped wire sections (3) forming an approximately elongated oval with a larger axis and a smaller axis, wherein adjacent cells (2) in neighboring rows are shifted by half of the larger axis of the oval with respect to each other in the direction of the larger axis, wherein the larger axis of the oval is directed in the circumferential direction of the tubular body and the smaller axis parallel to the axial direction thereof so that in a plane perpendicular to the longitudinal axis of the body, one branch of each U-shaped wire section (3) in one row forms together a closed ring shape, and wherein adjacent cells (2) in one row are interconnected in a flexible manner at an axially extending portion of the U-shaped wire sections. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A prosthetic device for sustaining a vessel or hollow organ lumen, comprising:
a self-expanding wire frame (1) having a flexible tubular shape and rows of flexibly interconnected cells (2), each of the cells including first and second U-shaped wire sections (3) forming together an approximately elongated oval with a larger axis and a smaller axis, wherein each U-shaped wire section includes two separate wires each of which runs in a substantially helical shape through the rows of cells, wherein the two separate wires are wound one turn around each other at an axially extending portion where the two separate wires meet to form a bottom leg of the U-shape, wherein adjacent cells (2) in neighboring rows are shifted by half of the larger axis of the oval with respect to each other in the direction of the larger axis, wherein the larger axis of the oval is directed in a circumferential direction of the tubular shaped frame and the smaller axis parallel to the longitudinal axis of the tubular shaped frame, wherein in a plane perpendicular to the longitudinal axis of the tubular shaped frame, one branch of each U-shaped wire section (3) in one row forms together a closed ring shape, wherein adjacent cells (2) in one row are interconnected in a flexible manner at the axially extending portion of the U-shaped wire sections, wherein the two separate wires are a nickel-titanium alloy exhibiting superelastic properties.
Specification