PROBLEM TO BE SOLVED: To solve the problem that although the push-in property, turning force transmission performance and bending-resisting performance are cited as main characteristics which determine the operability of a catheter, it is necessary to meet the requirement conflicting with the rigidity of the catheter in order to satisfy any of the characteristics, and the respective required characteristics have been balanced still at a low level heretofore.SOLUTION: This catheter includes: a tubular resin body having a lumen as a tubular resin body and a reinforcement member which is disposed to enclose at least a part of the lumen and has at least one of a ground outer peripheral surface gradually decreased in outside diameter and a ground inner peripheral surface gradually increased in the inside diameter continuously or step by step toward the forward end which is one end of the lumen.COPYRIGHT: (C)2014,JPO&INPIT【課題】カテーテルの操作性を決める主な特性として、押し込み性、回転力伝達性、耐折れ曲がり性が挙げられる。しかしながら、いずれの特性も満たすには、カテーテルの剛性に対する相反する要求を同時に解決する必要があり、従来においては、それぞれの要求特性を低いレベルでバランスさせるに止まっていた。【解決手段】管状樹脂体であるルーメンルーメンを有する管状樹脂体と、ルーメンの少なくとも一部を包囲するように配置され、ルーメンの一端である先端方向へ向かって連続的または段階的に外径が漸減する研削外周面および内径が漸増する研削内周面の少なくともいずれかを有する補強部材とを備えるカテーテルを提供する。【選択図】図4
