BLOOD PURIFYING APPARATUS

PROBLEM TO BE SOLVED: To provide a credible blood purifying apparatus which measures and controls easily and accurately a flow of a dialysis fluid or a replacement fluid regardless of the quantity of the flow and even when the flow changes within a short period. SOLUTION: The blood purifying apparatus has a blood circuit 4 having a blood purifier 3, a dialysis fluid supply circuit 7 for supplying a dialysis fluid to the blood purifier, a dialysis fluid discharge circuit 9 for discharging a used dialysis fluid from the blood purifier, and a replacement fluid supply circuit 12 for supplying a replacement fluid to the blood circuit. A flow detecting container is bifurcated from and is connected to at least one of the dialysis fluid supply circuit, the dialysis fluid discharge circuit and the replacement fluid supply circuit. The flow detecting container has a valve for controlling the introduction or discharge of fluid into or from the flow detecting container and a pressure change detecting means for detecting pressure change due to change of the height of a water column within the flow detecting container. With such a configuration, a flow within the circuit is measured by using the pressure change detected by the pressure change detecting means. COPYRIGHT: (C)2007,JPO&INPIT