Hemodialysis device

A hemodialysis device comprising a dialyzer that performs hemodialysis, a chamber that is provided in a dialysate circuit and stores a dialysate, a dialysate supply passage that is connected to a supply compartment of the chamber to supply a fresh dialysate to the dialyzer, a dialysate recovery passage that is connected to a recovery compartment of the chamber to recover a used dialysate that flows through the dialyzer, a blood circuit that causes blood to flow through the dialyzer, a replacement fluid passage provided between the dialysate supply passage and the blood circuit, first flow rate restriction device provided at a downstream side of a connection portion with the replacement fluid passage in the dialysate supply passage, second flow rate restriction device provided in the replacement fluid passage, and a control device that controls the first flow rate restriction device and the second flow rate restriction device,

• the control device adjusting a flow rate of a replacement fluid that is supplied to the blood circuit via the replacement fluid passage by controlling the first flow rate restriction device and the second flow rate restriction device,
• and comprising
• a connection portion pressure measurement device that measures a pressure of the connection portion of the dialysate supply passage and the replacement fluid passage, and blood circuit pressure measurement device that measures a pressure of the blood circuit, and wherein
• during one round from a time when the supply compartment of the chamber is in a state of being filled with the fresh dialysate until all of the fresh dialysate in the supply compartment is discharged, the control device performs feedback control that adjusts the second flow rate restriction device a plurality of times based on a replacement fluid flow rate set as a target, a measured pressure of the connection portion pressure measurement device, and a measured pressure of the blood circuit pressure measurement device.