TUBE BODY AND BLOOD REFLUX DEVICE

PURPOSE:To decrease the patient's burden by feeding the blood removed from a spacing for blood removal in the state of allowing a sheath inserted with an expansion catheter to remain in the blood vessel into the blood vessel from the aperture at the front end of the expansion catheter via the lumen of the sheath, a tube body and the lumen of the expansion catheter. CONSTITUTION:The sheath 30 is a slender and approximately cylindrical member having the lumen 35 and is constituted of the sheath body 31 made of a fluoroplastic material, a metallic or rigid synthetic resin hub 32 hermetically coupled its root end part, a projecting part 33 for connecting a blood feeding circuit formed to the side part of the hub 32, a sheath tube 36 connected thereto, and a 3-way cock 37. The inside diameter of a cavity 35 is so set that the max. required flow rate of the blood flowing into the space 31a for blood removal from the blood taking aperture 31b at the front end of the sheath body 31 can be assured when the sheath 30 is made to remain in blood vessel 2 of the upper arm or thigh part. The blood feeding circuit 40 admits the removed blood into the 1st lumen via the 1st aperture 16a of a branch hub 16.