To smoothly move a positioning member with respect to a catheter body without manual application of a large force and to stably hold a positioning member at a predetermined position after positioning a positioning member A catheter, an aid for attachment, and a ureter bypass device are provided.A renal catheter of a urinary bypass device includes a kidney catheter main body and a positioning member. The positioning member 13 includes a flanged tubular member 16 and a tightening member 17. The flanged tubular member 16 includes a collar portion 16 a that can be fixed to the kidney and a tubular portion 16 b that is bound to the collar portion 16 a. The tightening member 17 is fitted to the outer peripheral portion of the cylindrical portion 16 b. The inner peripheral surface of the cylindrical portion 16b and the outer peripheral surface of the renal catheter main body 11 are brought into pressure contact with each other by the tightening member 17 being fitted and the cylindrical portion 16b tightened so that the frictional force due to the contact between the inner peripheral surface and the outer peripheral surface , Relative movement between the renal catheter body 11 and the flanged tubular member 16 is restricted.BACKGROUND OF THE INVENTION【課題】大きな力を加えることなくカテーテル本体に対して位置決め部材をスムーズに手で移動させることができ、かつ、位置決め部材を位置決めした後は、所定の位置に位置決め部材を安定的に保持することができるカテーテル、装着用補助具、及び尿管バイパス装置を提供する。【解決手段】尿管バイパス装置1の腎臓カテーテル3は、腎臓カテーテル本体11と位置決め部材13とを備える。位置決め部材13は、鍔付き筒状部材16と緊締部材17とを備える。鍔付き筒状部材16は、腎臓に固定可能な鍔部16aと、鍔部16aに結着された筒部16bとを備える。緊締部材17は、筒部16bの外周部に嵌合される。緊締部材17が嵌合されて筒部16bが緊締されることで筒部16bの内周面と腎臓カテーテル本体11の外周面とが圧接され、これら内周面と外周面との接触による摩擦力により、腎臓カテーテル本体11と鍔付き筒状部材16との相対移動が規制される。【選択図】図1
