PROBLEM TO BE SOLVED: To provide a medical treatment instrument that enables foreign matter to be easily removed even if being fixed.SOLUTION: A medical treatment instrument 1 of the present invention has a cylindrical member 10, a filamentary object 20 disposed in the cylindrical member 10, a distal member 30 connected to a distal side of the filamentary object 20, and a rotary member 40 connected to the proximal side of the filamentary object 20. When the filamentary object 20 is α-rotated in the connection part 50 with the rotary member 40, the distal member 30 is β-rotated, and when the filamentary object 20 is further γ-rotated from α-rotation in the connection part 50 with the rotary member 40, the distal member 30 is further δ-rotated from β-rotation, where α>β and γ<δ, and α-δ are rotation angles (degree). Also, the medical treatment instrument 1 of the present invention has a portion where the maximum rotation diameter of the filamentary object 20 is larger than the smallest outer diameter of the filamentary object 20 at the time when the rotary member 40 is rotated in the cylindrical member 10, or has a narrow part in the inside of the cylindrical member 10.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】本発明は、固着した異物であっても除去しやすい医療用処置具を提供することを目的とする。【解決手段】本発明の医療用処置具1は、筒状部材10と、筒状部材10内に配置されている線状物20と、線状物20の遠位側に接続されている遠位部材30と、線状物20の近位側に接続されている回転部材40と、を有しており、線状物20を回転部材40との接続部50においてα回転させたときに遠位部材30はβ回転し、線状物20を回転部材40との接続部50においてαからさらにγ回転させたときに遠位部材30はβからさらにδ回転し、α>β、γ<δであり、α~δは回転角度(度)である。また、本発明の医療用処置具1は、回転部材40を筒状部材10内で回転させたときの線状物20の最大回転直径が線状物20の最小外径よりも大きい部分を有しているか、または筒状部材10の内側に幅狭部を有している。【選択図】図1
