JP2002355314A5 - - Google Patents

Claims (8)

A stent comprising a cylindrical wall portion having a distal end and a proximal end; the cylindrical wall portion is a ribbon-shaped cylinder in which an elongated member having a bottom surface along the curved surface of the cylindrical wall portion. Arranged to spirally cover the wall-like part;
The ribbon-like body has a protruding part and a non-projecting part, and the protruding part has a center line parallel to the central axis of the cylindrical body. An angle with respect to the long axis passing through the wall surface and the protruding portion is provided to form a curved surface of the cylindrical wall;
A connecting member formed by an elongated member that connects the adjacent elongated members that form two adjacent circumferences of the ribbon-shaped body, the connecting member being configured with respect to a distance that the ribbon-shaped body goes around the cylinder; A stent having at least one, but at least two of the protruding portions of the ribbon are not connected by the connecting member.   A portion of the first ribbon-like body protruding in a convex shape and a portion of the second ribbon-like body adjacent to the first ribbon-like body not protruding in a convex shape are mutually in the center line direction of the portion of the ribbon-like body protruding in a convex shape. The stent according to claim 1, wherein the elongate member forms a dense cylindrical wall portion by entering.   The stent according to claim 1 or 2, wherein the projecting portion of the elongated member forms a continuous corrugated or continuous zigzag ribbon.   The projecting projecting portion of the elongated member is a part of a rhombus or an ellipse, and a portion intersecting the short axis or the major axis of the rhombus or ellipse is joined to the intersecting portion adjacent to each other by an elongated member; The stent according to any one of claims 1 to 3, wherein a ribbon-like body shaped like a bead is formed as a whole.   The stent according to any one of claims 1 to 4, wherein the connecting members are provided at intervals of 60 to 180 degrees with respect to the entire circumference of 360 degrees along the spiral longitudinal direction of the ribbon-like body.   The stent according to any one of claims 1 to 5, wherein the cylindrical wall portion is provided with a plurality of openings on a wall surface of a cylindrical wall portion made of metal or plastic.   The center line of the projecting portion of the ribbon-like body has an angle of 20 to 70 degrees with respect to the long axis passing through the wall surface parallel to the center axis of the cylindrical body. The stent according to any one of 1 to 6.   The projecting portion is an arc-shaped body along the cylindrical wall, and the ratio of the spiral width to the ellipse circumference is 0.58 times or more of the circumference length. The stent according to any one of claims 1 to 7.