| CPC A61F 2/9522 (2020.05) [A61F 2/04 (2013.01); A61F 2002/041 (2013.01); A61F 2002/9511 (2013.01); A61F 2210/0014 (2013.01)] | 8 Claims |
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1. A biliary stent unit comprising:
a stent having a cylindrical body, which has several spaces formed by twisting or crossing wires made of a superelastic shape memory alloy in a hollow cylindrical net shape and having several bending portions formed around an edge of both ends thereof, the stent including a pulling string tied to a space of the several bending portions at a first end of the cylindrical body, the pulling string having two parts having different lengths and protruding from the first end of the cylindrical body, the pulling string having a knot formed by tying the two parts of the pulling string having different lengths such that a longer part of the two parts protrudes outside a human body, and the stent being applied to a diseased part generated due to stricture or occlusion in the biliary tract of the human body;
a pulling rod having a hook for fixing and releasing the longer part of the pulling string which is protruding outside the human body;
the pulling string is fixed to the hook when the pulling rod is pulled out of the human body;
a soft tube in which the pulling string is inserted, the soft tube being guided close to the stent in the human body by the pulling string, and the soft tube having a male thread portion at a portion exposed outside the human body;
a cap having a female thread portion, which is fastened to the male thread portion, on an inner surface thereof, the cap having a through-hole on an outer surface thereof through which the pulling string passes, and the cap pressing and fixing the pulling string, the pulling string is then wound on an outer surface of the applied soft tube, on the skin of the human body; and
a fixing member covering the cap, and fixing the pulling string on the skin of the human body, thereby fixing the cap on the skin of the human body.
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