FLEXIBLE STENT

摘要

Provided is a flexible stent in which a free end strut does not tend to project outside when the stent is bent and shortening can be suppressed at the time of expansion of the stent. The flexible stent includes annular bodies having a wavy line pattern and connection elements that connect the annular bodies. The wavy line pattern is formed by V-shaped elements, in which two leg parts are joined by an apex part, being connected in a state where the apex parts alternately face opposite directions in an axial direction. A bending direction of one end part of the connection element and a bending direction of another end part thereof are opposite to one another. The end part of the connection element is connected to a portion other than the apex part of the V-shaped element of the adjacent annular body with the end part of the connection element being extended in a direction different from the direction in which the leg part extends. When viewed in a radial direction (RD), the direction in which an intermediate part of the connection element extends is oblique to the axial direction (LD). One of the two leg parts extends along the intermediate part of the connection element.

主权项

1. A flexible stent comprising: a plurality of circular bodies having a wavy-line pattern and arranged side-by-side in an axial direction; and a plurality of connection elements that connect the circular bodies that are adjacent and extend around an axis,
wherein the wavy-line pattern is formed in such a manner that a plurality of V-shaped elements in a substantially V-shape made by coupling two leg portions at an apex are connected in a state in which each apex is arranged to alternately face an opposite direction in an axial direction, wherein a direction in which one end of the connection element is bent and a direction in which the other end of the connection element is bent are opposite, wherein the end of the connection element is connected with a portion other than the apex of the V-shaped element at the adjacent circular bodies by extending in a direction different from a direction in which the leg portion extends, wherein, when viewing in a radial direction perpendicular to the axial direction, a direction in which the intermediate portion of the connection element extends is inclined with respect to the axial direction, and wherein one of the two leg portions extends along the intermediate portion of the connection element.