AN EXPANDABLE STENT

摘要

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 beta cell sides (5) positioned opposite to and interconnected with at least two mutually converging, angle alpha longer cell sides (3). For stability during expansion and compression of a self-expanding stent, the sum of the first angle alpha and the second angle beta should be in the range of 345 DEG to 360 DEG , preferably at 360 DEG to maintain a constant axial stent length.