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. Display fields of variable locations and lengths within each display strip are assigned to each product on a shelf through the control computer. by using calibration parameters then held.