PROBLEM TO BE SOLVED: To provide a technique to improve operability of a catheter in accordance with a higher level of a skill of the catheter.SOLUTION: An inner tube member which constitutes a tubular member of the catheter comprises a member 4a1 which has relatively high flexibility and is disposed on the distal end side and a member 4a2 which has relatively low flexibility and is disposed on the proximal end side. A restraint member 100 as an intermediate member is provided between the proximal end of the member 4a1 and the distal end of the member 4a2. The restraint member 100 is provided with a hollow portion 102 which extends along the catheter in the axial direction, corresponds to a first lumen 20 provided in the inner tube member 4a, and has an inner diameter smaller than the inner diameter of the first lumen 20. A movement stop part 110 is provided on an operation wire 40 which is inserted through the hollow portion 102 at a prescribed place located beyond the restraint member 100 toward the distal end side. The outer diameter of the movement stop member 110 is larger than the inner diameter of the hollow portion 102.COPYRIGHT: (C)2012,JPO&INPIT【課題】より高度なカテーテル技術に応じて、カテーテルの操作性を向上させることのできる技術を提供する。【解決手段】カテーテルの管状部材を構成する内筒部材は、遠位端側に配置された相対的に柔軟性の高い部材4a1と近位端側に配置された相対的に柔軟性の低い部材4a2とで構成されている。部材4a1の近位端と部材4a2の遠位端との間に中間部材として制止部材100が設けられている。制止部材100には、第1のルーメン20に対応して、内筒部材4aに設けられた第1のルーメン20の内径よりも小さい内径を有する中空部分102がカテーテルの軸方向に沿って設けられている。中空部分102に挿通された操作用ワイヤ40には、制止部材100より遠位側の所定箇所に移動止め部110が設けられている。移動止め部材110の外径は、中空部分102の内径より大きい。【選択図】図3
