Abstract: A hemodialysis use adjunctive device comprises an artificial blood vessel to be transplanted in the body at a location between an artery and a vein, a T-shaped tubular body comprising a straight tube portion and a stem portion and interposed in the artificial blood vessel, and an access tube provided at one end portion thereof with a jack having a pair of needles. A throttling unit is provided in the straight tube portion and is arranged so that it can be located between the pair of needles of the jack projecting from the stem portion to the straight tube portion when the jack of the access tube is connected to the stem portion of the tubular body. This arrangement can provide the result that while hemodialysis can be performed properly, internal membrane thickening of the vein and the resulting stricture or obstruction of the same can be prevented.

Abstract: A hemodialysis use adjunctive device comprises an artificial blood vessel to be transplanted in the body at a location between an artery and a vein, a T-shaped tubular body comprising a straight tube portion and a stem portion and interposed in the artificial blood vessel, and an access tube provided at one end portion thereof with a jack having a pair of needles and is used for hemodialysis by performing the step that the tubular body is transplanted in the body together with the artificial blood vessel in the state of the stem portion being exposed at its top end portion from the body and then, at the time of hemodialysis, the jack of the access tube is connected to the stem portion of the tubular body and the other end portion of the access tube is connected to a hemodialysis machine.

Abstract: A blood stream adjuster is arranged inside a blood vessel for bypass made of autologous blood vessel, artificial blood and so on when the blood vessel for bypass is transplanted between two blood vessels of the human body. The blood stream adjuster comprises a stricture portion which is located at its axis direction center part and has a smaller inside diameter in comparison with the inside diameters of axis direction both ends. The inside diameter of the stricture portion is set so that quantity, velocity or pressure of blood stream will be suitable for the blood vessel with which the side to receive blood stream in the blood vessel for bypass is anastomosed. Hereby, the occurrence of stricture and obstruction is restrained around the anastomotic portion between the blood vessel for bypass and its anastomotic blood vessel.