PROBLEM TO BE SOLVED: To provide a catheter with a valve allowing smooth flow of a solution in both the cases where the solution is flowing from the inside of the catheter toward the outside of the catheter and where the solution is flowing from the outside of the catheter toward the inside of the catheter.SOLUTION: The catheter 11 with a valve includes a tubular body 12 made of an elastic and flexible synthetic resin material. The catheter 11 includes a valve B1 having a slit 16 that can be opened and closed by passing through the outer surface 12b of the tubular body from the inner surface 12a of the tubular body. A movable wall 15 sunken toward the inside of the tubular body 12 is provided in an end tip member region 14 of the tubular body 12. The location of the movable wall 15 has a structure with differences in hardness in the thickness direction of the tubular body 12. In the cross-sectional surface perpendicular to the center axis C1 of the tubular body 12, the movable wall 15 has a movable wall central portion P1 located at a position close to the center axis C1 and a movable wall tip portion P2 located at a position far from the center axis C1. The slit 16 configuring the valve B1 is formed on the movable wall tip portion P2.COPYRIGHT: (C)2013,JPO&INPIT【課題】カテーテル内部から外部に向けて液体を流すとき、外部から内部に向けて液体を流すときの双方において液体の流れをスムーズにすることができる弁付きカテーテルを提供すること。【解決手段】本発明の弁付きカテーテル11は、弾性及び可撓性を有する合成樹脂材料製の管状体12からなる。弁付きカテーテル11は、その内面12aから外面12bを貫通して開閉可能なスリット16を有する弁B1を備える。管状体12の先端部領域14に管状体12の内側方向に凹んだ形状の可動壁15が設けられる。可動壁15がある箇所は、管状体12の厚さ方向に硬度差がある構造を備える。管状体12の中心軸C1に直交する断面にて、可動壁15は、中心軸C1に近い位置にある可動壁中央部P1と、中心軸C1から遠い位置にある可動壁端部P2とを有する。弁B1を構成するスリット16は可動壁端部P2に形成されている。【選択図】 図2
