PROBLEM TO BE SOLVED: To provide a catheter capable of obtaining a smooth operability by not only being easily inserted into a fistula, but being capable of sufficiently improving fixing force inside a prescribed organ and reducing action resistance for an instrument to be inserted inside, or the like.SOLUTION: The catheter includes a tube body 11 inserted into the fistula of a patient and a bumper section 20 provided on a tip side of the tube and fixed in an installed position of the tube body 11 by being left inside a stomach wall. In this case, the bumper section 20 is composed of a plurality of belt-like pieces 21, and the respective belt-like pieces 21 are shortened in their diameters so to be shrunk along the outer periphery surface of the tube body 11 when the tube body 11 is inserted/extracted from the fistula, while on the stomach wall side, the tube body 11 is fixed in the installed position after the diameter is extended to its original curved state.COPYRIGHT: (C)2013,JPO&INPIT【課題】瘻孔に挿入しやすいばかりでなく、所定臓器の内部における固定力も十分に高めることができ、また、内部に挿入する器具等の動作抵抗を減らして、円滑な操作性を得ることができるカテーテルを提供する。【解決手段】患者の瘻孔に挿入されるチューブ本体11と、その先端側に設けられ、胃壁内側に留置されてチューブ本体11を設置位置に固定するバンパー部20と、を備え、バンパー部20は複数の帯状片21から成り、各帯状片21は、チューブ本体11を瘻孔に挿脱する際に、チューブ本体11の外周面に沿って萎むよう縮径する一方、胃壁内側では、元の湾曲した状態に拡径してチューブ本体11を設置位置に固定する。【選択図】図1
