Expandable stent
First Claim
1. An expandable stent comprising a flexible, tubular-shaped body (1) with a longitudinal axis and at least two ends, a wall of the body being formed by interconnected, closed lattice cells (2) arranged with at least two cells laterally adjacent to each other, each closed lattice cell (2) having first elongated, mutually converging cell sides (3) which form a first angle (α
- ) therebetween, the body including filament-shaped lattice material in which the stent is expandable from a radially compressed state having a first diameter into a radially expanded state having a second diameter larger than said first diameter, wherein the lattice material in at least two of the lattice cells (2) forms a generally arrowhead-like shape with second interconnected cell sides (5) which form a second angle (β
) therebetween and are positioned opposite to and interconnected with the first mutually converging cell sides (3).
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Accused Products
Abstract
An expandable endovascular stent comprises a flexible, tubular body (1) with a longitudinal axis, the wall of which is formed by interconnected, closed lattice cells (2) arranged with at least two cells adjacent to each other in the circumferential direction. Filament-shaped lattice material capable of transmitting compressive forces in the axial direction of the filament extends continuously from one lattice cell directly into the lattice cell following in the longitudinal direction. The stent can be expanded from a radially compressed state into a radially expanded state having a larger diameter. In the expanded state of the stent, the pressure transmitting lattice material in several of the lattice cells (2) forms a heart-like or arrowhead-like shape with at least two interconnected diverging, angle β cell sides (5) positioned opposite to and interconnected with at least two mutually converging, angle α longer cell sides (3). For stability during expansion and compression of a self-expanding stent, the sum of the first angle α and the second angle β should be in the range of 345° to 360°, preferably at 360° to maintain a constant axial stent length.
150 Citations
25 Claims
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1. An expandable stent comprising a flexible, tubular-shaped body (1) with a longitudinal axis and at least two ends, a wall of the body being formed by interconnected, closed lattice cells (2) arranged with at least two cells laterally adjacent to each other, each closed lattice cell (2) having first elongated, mutually converging cell sides (3) which form a first angle (α
- ) therebetween, the body including filament-shaped lattice material in which the stent is expandable from a radially compressed state having a first diameter into a radially expanded state having a second diameter larger than said first diameter, wherein the lattice material in at least two of the lattice cells (2) forms a generally arrowhead-like shape with second interconnected cell sides (5) which form a second angle (β
) therebetween and are positioned opposite to and interconnected with the first mutually converging cell sides (3). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
- ) therebetween, the body including filament-shaped lattice material in which the stent is expandable from a radially compressed state having a first diameter into a radially expanded state having a second diameter larger than said first diameter, wherein the lattice material in at least two of the lattice cells (2) forms a generally arrowhead-like shape with second interconnected cell sides (5) which form a second angle (β
-
21. An expandable/collapsible stent with a tubularly-shaped body formed from at least two series of closed lattice cells, at least one series of closed lattice cells each comprising a general arrowhead-shape having interconnected cell sides which form a first angle (α
- ) therebetween and mutually converging cell sides which form a second angle (β
) therebetween, the cells further having laterally interconnected cell sides, and with cells of one series adjacent to cells of the at least one other series and having cell sides in common, the orientation of the adjacent sides being such that when the at least two series are radially compressed or expanded there is no significant longitudinal expansion or contraction of the stent. - View Dependent Claims (22, 23, 24, 25)
- ) therebetween and mutually converging cell sides which form a second angle (β
Specification