PROBLEM TO BE SOLVED: To improve the dialysis efficiency in a hemodialysis apparatus using a vessel which is capable of strictly controlling the supply volume and discharge volume of a dialysis fluid to the dialyzer.SOLUTION: A hemodialysis apparatus 1 has a control unit 15 which executes a dialysis fluid exchange process and a dialysis fluid supply process alternately to control at least any of a first fluid feed pump 82, a second fluid feed pump 52, on-off valves 83, 84, and on-off valves 60, 61 such that execution time T2 of the dialysis fluid supply process becomes longer than execution time T1 of the dialysis fluid exchange process in one cycle. In the dialysis fluid exchange process, the control unit 15 activates the first fluid feed pump 82 and opens a dialysis fluid exchange circuit 14 by the on-off valves 83, 84 for supplying a dialysis fluid to a first chamber 30 of a vessel 12 to cause a partition wall 32 to displace to the side of a second chamber 31, thereby discharging dialysis waste solution from the second chamber 31 to the outside. In the dialysis fluid supply process, the control unit 15 activates a second fluid feed pump 52 and opens a dialysis fluid supply circuit 13 by the on-off valves 60, 61 to cause the partition wall 32 to displace to the side of a first chamber 30, thereby supplying the dialysis fluid from the first chamber 30 to a dialyzer 10 and discharging the dialysis waste solution from the dialyzer 10 to the second chamber 31.COPYRIGHT: (C)2015,JPO&INPIT【課題】透析器に対する透析液の供給量と排液量の制御を厳格に行うことができる容器を用いた血液透析装置において、透析効率を向上する。【解決手段】血液透析装置1は、第1の送液ポンプ82を稼働し、開閉弁83、84により透析液交換回路14を開放して、容器12の第1の室30に透析液を供給し、隔壁32が第2の室31側に変位し、第2の室31から外部に透析廃液を排出する透析液交換工程と、第2の送液ポンプ52を稼働し、開閉弁60、61により透析液供給回路13を開放して、隔壁32が第1の室30側に変位し、第1の室30から透析器10に透析液を供給し、透析器10から第2の室31に透析廃液を排出する透析液供給工程とを交互に実行し、1サイクルにおける透析液供給工程の実行時間T2が透析液交換工程の実行時間T1よりも長くなるように第1の送液ポンプ82、第2の送液ポンプ52、開閉弁83、84又は開閉弁60、61の少なくともいずれかを制御する制御部15を有する。【選択図】図1
