PROBLEM TO BE SOLVED: To provide a catheter assembly having high safety and capable of discharging contrast medium to both of ventriculography and coronary angiography.SOLUTION: An outer catheter 20 includes: a distal-end outer opening part 42 in which a first lumen 41 is opened, formed at a distal end and a lateral-face outer opening part 43 in which the first lumen 41 is opened, formed at a lateral face. An inner catheter 30 includes: a distal-end inner opening part 72 in which a second lumen 71 is opened, formed at a distal end and a lateral-face inner opening part 73 in which the second lumen 71 is opened, formed at a lateral face. A catheter assembly 10 is so configured that, in the distal-end opening state in which the distal-end outer opening part 42 and the distal-end inner opening part 72 take such a physical relationship as to be communicated with each other, an interval between the lateral-face outer opening part 43 and the lateral-face inner opening part 73 is closed, and, in a lateral-face opening state in which the lateral-face outer opening part 43 and the lateral-face inner opening part 73 take such a physical relationship as to be communicated with each other, an interval between the distal-end outer opening part 42 and the distal-end inner opening part 72 is closed.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】安全性が高く、かつ心室造影および冠動脈造影の両方に造影剤を吐出できるカテーテル組立体を提供する。【解決手段】外カテーテル20は、先端部に第1のルーメン41が開口する先端外側開口部42が形成されるとともに、側面に第1のルーメン41が開口する側面外側開口部43が形成され、内カテーテル30は、先端部に第2のルーメン71が開口する先端内側開口部72が形成されるとともに、側面に第2のルーメン71が開口する側面内側開口部73が形成され、先端外側開口部42および先端内側開口部72が連通する位置関係となる先端開口状態において側面外側開口部43と側面内側開口部73の間が閉鎖され、側面外側開口部43および側面内側開口部73が連通する位置関係となる側面開口状態において先端外側開口部42と先端内側開口部72の間が閉鎖されるカテーテル組立体10である。【選択図】図1
