Stent manufacturing method thereof and indwelling method thereof

A manufacturing method of a stent, comprising the steps of:

• braiding a plurality of filament body of Ti—Ni alloy of excessive Ni to form a hollow cylindrical body deformable into mutually different first shape and second shape;
• memorizing lower-temperature shape for memorizing the first shape to the hollow cylindrical body as a lower-temperature shape;
• and
• memorizing higher-temperature shape for memorizing the second shape to the hollow cylindrical body as a higher-temperature shape.

An indwelling method of a stent, comprising the steps of:

• providing a stent comprising a hollow cylindrical body made of a plurality of filament body of Ti—Ni alloy having excessive Ni, the hollow cylindrical body memorizing first shape during lower-temperature shape memorizing process and second shape during higher-temperature shape memorizing process and being deformable between the first shape and the second shape in accordance with temperature change, the first shape of lower-temperature having larger cylinder diameter than cylindrical diameter of second shape of higher-temperature;
• accommodating the stent into a sheath after making it thinner than the cylinder diameter of the first shape;
• inserting a distal end of the sheath adjacent to indwelling position of intracorporeal lacuna;
• and
• inserting a rod into the sheath and pushing out the stent in the sheath to indwell the stent in the intracorporeal lacuna.