PROBLEM TO BE SOLVED: To provide a catheter assembly which can discharge a fluid in a desired position in a desired direction.SOLUTION: A catheter assembly includes an inner tube 21 in which a first lumen 24 is formed and an outer tube 40 which covers a part of the inner tube 21, has a second lumen 41 formed between the outer tube and a peripheral surface of the inner tube 21, is rotatable relative to the inner tube 21 and movable in a longitudinal direction, and has at least one side hole 46 formed in a position separated toward a proximal end side from a distal end. The outer tube 40 has a slidable part 49 sliding while making close contact with the peripheral surface of the inner tube 21 at least in one region between the distal end and the side hole 46, and the outer tube 40 has an X-ray impermeable contrast marker 50 arranged by corresponding to a circumferential position where the side hole 46 is provided.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2020,JPO&INPIT【課題】望ましい位置で望ましい方向へ流体を放出できるカテーテル組立体を提供する。【解決手段】カテーテル組立体は、第１ルーメン２４が形成される内管２１と、内管２１の一部を覆って内管２１の外周面との間に第２ルーメン４１が形成され、内管２１に対して回転可能かつ長軸方向に移動可能であり、先端から基端側に離間した位置に少なくとも１つの側孔４６が形成された外管４０と、を有し、外管４０は、先端から側孔４６の間の少なくとも一部の領域に、内管２１の外周面と密接しつつ摺動する摺動部４９を有し、外管４０は、側孔４６が設けられる周方向位置に対応して配置されるＸ線不透過性の造影マーカー５０を有する。【選択図】図２
