Blood purification apparatus

A blood purification apparatus comprising:

• a blood circuit that includes an arterial blood circuit and a venous blood circuit, and that is capable of extracorporeally circulating blood of a patient from a leading end of the arterial blood circuit to a leading end of the venous blood circuit;
• a blood purification means that is interposed between the arterial blood circuit and the venous blood circuit of the blood circuit, and purifies blood that flows through the blood circuit;
• a blood pump disposed in the arterial blood circuit;
• a dialysate introduction line for introducing dialysate to the blood purification means, and a dialysate discharge line for discharging the dialysate from the blood purification means;
• a liquid delivery pump disposed in the dialysate introduction line;
• a dialysate supply line that branches from a downstream side of the liquid delivery pump in the dialysate introduction line and is connected to a predetermined portion of the blood circuit, and that supplies the dialysate of the dialysate introduction line to the blood circuit;
• a valve means having a first opposing wall and a second opposing wall, the valve means closes and opens the dialysate introduction line and the dialysate supply line in any manner, the valve means comprising:
• a movable unit positioned between the first opposing wall and the second opposing wall, wherein the dialysate introduction line is positioned between the movable unit and the first opposing wall and the dialysate supply line is positioned between the movable unit and the second opposing wall, and
• an actuator that actuates the movable unit so that the movable unit closes the dialysate introduction line or the dialysate supply line by compressing the dialysate introduction line or the dialysate supply line between the movable unit and the first opposing wall or the second opposing wall respectively;
• and
• a control unit that operates the valve means to allow hemodialysis treatment in which the dialysate supply line is closed while the dialysate introduction line is opened, hemofiltration treatment in which the dialysate supply line is opened while the dialysate introduction line is closed, and hemodiafiltration treatment in which the hemodialysis treatment and the hemofiltration treatment are performed concurrently by alternately closing and opening the dialysate introduction line and the dialysate supply line.