Stent having a locking part which prevents the strut from sliding out of the junction pipe

#The present application is a national stage application of PCT Application No. PCT/JP2007/063566, filed Jul. 6, 2007, which claims priority of JP 2006-201918, filed Jul. 25, 2006.

#The present invention relates to a stent used for medical treatment of a tubal tissue in a body such as a blood vessel, and more particularly, to a stent which is configured so that a stabilizer hook or strut connected to a stent main wire can maintain a stable connected state.

#In a human body, there are many tubal tissues such as a blood vessel, a bile duct, an ureter and an esophagus, and there is a fear that peculiar disease such as stricture and occlusion is generated. In the case of the blood vessel for example, diseases such as stricture, occlusion, aneurysm and varix is generated in some cases. The aneurysm is such a serious disease that rupture causes major bleeding, and it is necessary to conduct medical treatment swiftly. Therefore, in order to conduct effective medical treatment, various tools have been developed.

#FIG. 1 are diagrams for describing an example of a relation between a sheath and a stent including a plurality of loop stents connected to each other through a strut;

#FIG. 2 is a diagram for describing a relation between the strut and the loop stent whose diameter is increased;

#FIG. 3 is a diagram for describing a structure of a connection part;

#1: Stent 2: Stent main wire 3: Loop stent 4: Strut 4a: End 5: Stabilizer hook 6: Protection pipe 7: Junction pipe 7a to 7c: Unit pipe 7d, 7e: Auxiliary pipe 11: Folded-back portion 12: Swelling portion 13: Bent portion 14: Weld point 15: Cladding portion 21: Graft 22: Sheath 23: Dilator 23a: Notch 24: Guide wire

#Preferred embodiments of a stent according to the present invention will be described. A stent according to the present invention is applied to tubal tissue such as a blood vessel, a bile duct, an ureter and an esophagus in a human body. When disease such as stricture and occlusion is generated in these tubal tissues, especially in the case of the blood vessel, when aneurysm or varix is generated, the stent indwells in the affected area, and the stent has a function for reinforcing the tubal tissue in the affected area.

#The stent of the invention includes a combination of the stent main wire and the strut made of metal round rod wire members, and wire parts such as the stabilizer hook. The connection parts of these wire parts are connected to each other through the junction pipe. That is, in the invention, the shape and the structure of the stent are not limited, but the invention is limited to the structure that the stent includes the wire parts, and the connection parts of the wire parts are connected to each other through the junction pipe.