PROBLEM TO BE SOLVED: To provide an artificial sphincter using a magnetic suction in which a uniform pressure force is given along the circumference of a biological tube part.SOLUTION: An artificial sphincter 30 includes: a pressure structure 32 forming a ring shape capable of being wound around a biological tube part by rounding a sheet with wire attached with left wire 120 and right wire 121 with one end fixed and extended to both end sides respectively and fixing both ends to each other in the central part of a sheet-like extensive form the left and right tubes 34, 35 for movably guiding the left and right wires 120, 121 drawn out from the pressure structure 32 left and right wire drive units 36, 37 for bringing each other end of the left and right wires 120, 121 into a state of tension or relaxation and an external magnet for operating the left and right wire drive unit 36, 37 by coming close to or away from the left and right wire drive units 36, 37.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2016,JPO&INPIT【課題】磁石の吸引力を用いる人工括約筋において、生体管部の周囲に沿って一様な圧迫力を与えるようにすることである。【解決手段】人工括約筋30は、シート状展開形状の中央部に一方端が固定され両端部側にそれぞれ延伸する左ワイヤ120と右ワイヤ121が取り付けられたワイヤ付きシートを丸めて両端部を互いに固定して生体管部の周りに巻き付けることができる円環形状を形成した圧迫構造体32と、圧迫構造体32から引き出される左右ワイヤ120,121を移動可能に案内する左右チューブ34,35と、左右ワイヤ120,121のそれぞれの他端部を引張あるいは弛緩させる左右ワイヤ駆動部36,37と、左右ワイヤ駆動部36,37に近接または離間することで左右ワイヤ駆動部36,37を作動させる外部磁石とを備える。【選択図】図2
