PROBLEM TO BE SOLVED: To provide a tracheal tube with which safety can be increased, and also to provide a method of mounting a cuff of the tracheal tube.SOLUTION: The tracheal tube according to the present invention comprises: a tube body 2 and a cuff 3 which is mounted to the tube body, and of which barrel is contractible and expandable in a radial direction of the tube body. The barrel has twisted grooves 61 formed on an outer wall thereof, the twisted grooves extending twisted in such a manner that the positions in a circumferential direction of the tube body change gradually toward one side in a center line direction of the tube body at least while the barrel changes from a contracted state to an expanded state. A method of mounting the cuff according to the invention includes: fixing one end side of the annular cuff material to an outer wall of the tube material and fixing the other end side of the cuff material to the outer wall of the tube material in a state being twisted in a circumferential direction of the tube material relative to the one end side.SELECTED DRAWING: Figure 6COPYRIGHT: (C)2017,JPO&INPIT【課題】安全性を向上可能な気管チューブ及び気管チューブのカフの装着方法を提供する。【解決手段】本発明に係る気管チューブは、チューブ本体2と、前記チューブ本体に装着され、胴部が前記チューブ本体の径方向に収縮及び拡張可能なカフ3と、を備え、少なくとも前記胴部が収縮状態から拡張状態に変化する間に、前記チューブ本体の中心軸線方向の一方向に向かうにつれて前記チューブ本体の周方向の位置が変化するように捩れて延在する捩れ溝部61が前記胴部の外壁に形成される。本発明に係るカフの装着方法は、環状のカフ材の一端側をチューブ材の外壁に固定する工程と、前記カフ材の他端側を前記チューブ材の外壁に、前記一端側に対してチューブ材の周方向に捩った状態で固定する工程と、を含む。【選択図】図6
