PROBLEM TO BE SOLVED: To provide a catheter and a method for manufacturing the same which can suppress unplanned operation occurring to a distal end part of the catheter caused by a change of a path length of an operation wire when the catheter is inserted while being bent in a branch of a body cavity, such as the blood vessel.SOLUTION: A catheter 100 having a lumen 12 inside has: a large diameter resin tube 14 forming a lumen of a large diameter an operation wire small-diameter tube 16 having a small diameter which is disposed outside the lumen an operation wire 18 which is inserted in the operation wire small-diameter tube and has a distal end part joined to a distal end part of the catheter and a first reinforcement layer 22 which covers both the large diameter resin tube and operation wire small-diameter tube. The catheter is configured so that: it has an isolated area 24 where the large diameter resin tube and the first reinforcement layer are isolated in the isolated area, the operation wire small-diameter tube is loosely inserted between the large diameter resin tube and the first reinforcement layer and the operation wire small-diameter tube is movable in a circumferential direction of the large diameter resin tube in the isolated area.COPYRIGHT: (C)2015,JPO&INPIT【課題】血管などの体腔の分岐においてカテーテルを屈曲させながら侵入させる場合に生じる操作線の経路長の変化に起因して、カテーテルの遠位端部に発生する予定しない動作を抑制可能なカテーテルおよびその製造方法を提供する。【解決手段】内部にルーメン12を有するカテーテル100は、大径のルーメンを形成している大径樹脂管14と、ルーメンの外側に配置された小径の操作線細管16と、操作線細管に挿通され遠位端部がカテーテルの遠位端部に連結された操作線18と、大径樹脂管および操作線細管を共に被覆する第一補強層22と、を有する。カテーテルは、大径樹脂管と第一補強層とが遊離する遊離領域24を有すると共に、遊離領域において大径樹脂管と第一補強層との間に操作線細管が遊挿されており、操作線細管が、遊離領域において大径樹脂管の周方向に移動可能となるよう構成される。【選択図】図3
