Stent

摘要

A stent includes a plurality of wavy annular bodies each formed in an annular shape from a wavy linear member, and a connection part provided between the adjacent wavy annular bodies, interconnecting the adjacent wavy annular bodies coaxially, weaker than the wavy annular bodies and rupturable. The connection part extends in a slanting manner relative to an axial direction in which the wavy annular bodies are aligned, and interconnects that one inflexed part of one wavy annular body which is curved in a shape projected toward the other wavy annular body adjacent to the one wavy annular body and that the other inflexed part of the other wavy annular body which is curved in a shape projected toward the one wavy annular body.

主权项

1. A stent comprising:
a plurality of wavy annular bodies coaxially arranged in an axial direction so that adjacent wavy annular bodies are positioned axially adjacent one another; each wavy annular body including a plurality of circumferentially adjacent strut portions and a plurality of curved inflexed portions each connecting two of the strut portions which are circumferentially adjacent one another; the curved inflexed portions of each wavy annular body including crest-shaped curved inflexed portions and trough-shaped curved inflexed portions which are curved in opposite directions; a plurality of axially adjacent pairs of wavy annular bodies being connected to each other by connection parts, all of the connection parts connecting the plurality of axially adjacent pairs of wavy annular bodies being weaker than the wavy annular bodies allowing the connection parts to rupture in advance of the axially adjacent wavy annular bodies when a radially outwardly directed force is applied to the stent from inside the stent; each connection part having one end directly connected to a crest-shaped curved inflexed portion of one of the wavy annular bodies and an opposite end directly connected to a trough-shaped curved inflexed portion of the axially adjacent wavy annular body; each connection part extending in a slanting manner relative to the axial direction; and wherein the connection parts are first connection parts, and the stent further comprising, in addition to the plurality of wavy annular bodies, an endmost wavy annular body at each axial end of the stent, both of the endmost wavy annular bodies being connected to the axially adjacent wavy annular body by a second connection part possessing a greater width than the width of the first connection parts.