PROBLEM TO BE SOLVED: To provide a blood purification device capable of precisely detecting the blockage of an arterial-side blood circuit in an arterial-side blood return step.SOLUTION: A control means 19 detects a pressure with a venous pressure sensor 21 while carrying out two or more times of the arterial-side blood return steps including: a pressure accumulation step of driving a blood pump 4 forward while closing a flow path with an electromagnetic valve V2 to accumulate a pressure between the installation position of the blood pump 4 and the installation position of the electromagnetic valve V2 and a pressure release step of driving the blood pump 4 reversely while maintaining the closing of the flow path by the electromagnetic valve V2 to return blood from the distal end of an arterial-side blood circuit 2. The blockage of the flow path in an arterial-side blood circuit 1 can be detected on the basis of the change in the pressure at the corresponding predetermined time point in each of the arterial-side blood return steps.COPYRIGHT: (C)2013,JPO&INPIT【課題】動脈側返血工程における動脈側血液回路の閉塞を精度よく検知することができる血液浄化装置を提供する。【解決手段】制御手段19は、電磁弁V2にて流路を閉止させつつ血液ポンプ4を正転駆動させ、血液ポンプ4の配設位置と電磁弁V2の配設位置との間で蓄圧させる蓄圧工程と、電磁弁V2による流路の閉止を維持させつつ血液ポンプ4を逆転駆動させ、動脈側血液回路2の先端から返血させる圧解放工程とを含む動脈側返血工程を複数回行わせつつ静脈圧センサ21で圧力を検出させ、各動脈側返血工程における対応する所定時点の圧力の変化に基づき動脈側血液回路1における流路の閉塞を検知し得るものである。【選択図】図5
