Patent ID: 8216191

Claim:
A hemodialysis use adjunctive device comprising: an artificial blood vessel being transplanted in the body at a location between an artery and a vein, a T-shaped tubular body having a straight tube portion and a stem portion, the T-shaped tubular body being interposed in the artificial blood vessel, wherein the straight tube portion is for communicating between a portion of the artificial blood vessel on the artery side and a portion of the same on the vein side, and the stem portion is integrally formed with the straight tube portion so that it can orthogonally communicate with the straight tube portion at one end thereof at an intermediate portion of the straight tube portion, an access tube provided at one end thereof with a jack having a pair of needles, wherein the hemodialysis use adjunctive device is used in hemodialysis wherein 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, 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, and restriction unit reducing an area of the straight tube portion of the tubular body, the restriction unit is provided in an interior of the straight tube portion of the tubular body, and the restriction unit includes a flow-restricting center located between the pair of needles of the jack projecting from the stem portion to the interior of the straight tube portion when the jack of the access tube is connected to the stem portion of the tubular body, and the restriction unit controlling the blood flow resulting in a shearing stress on a blood vessel wall of the vein caused by the blood flow flowing through the artificial blood vessel on the vein side of not more than 2.0 dyne/cm 2 .