PROBLEM TO BE SOLVED: To provide a hemodialysis apparatus in which an undiluted solution A for dialysis and an undiluted solution B for dialysis are prevented from being mixed almost as the undiluted solution when cleaned, and the corrosion of a metallic portion can be prevented.SOLUTION: A hemodialysis apparatus 2 includes: an undiluted solution A passage 24 for supplying an undiluted solution A for dialysis containing a sodium chloride as the main component and containing calcium in a mixing vessel and an undiluted solution B passage 25 for supplying an undiluted solution B for dialysis containing a sodium hydrogen carbonate as the main component in the mixing vessel. Undiluted solution A supply piping 7 and undiluted solution B supply piping 8 can be connected to the undiluted solution A passage 24 and the undiluted solution B passage 25, respectively. A bypass passage 41 is provided for bringing the undiluted solution A passage 24 into communication with a waste liquid passage 28. When the undiluted solution A passage 24 and the undiluted solution B passage 25 are cleaned, the cleaning solution supplied from the undiluted solution A supply piping 7 is discharged out of the waste liquid passage 28 through the bypass passage 41 from the undiluted solution A passage 24. Accordingly, the undiluted solution A for dialysis and the undiluted solution B for dialysis can be prevented from being mixed almost as the undiluted solution.COPYRIGHT: (C)2015,JPO&INPIT【解決手段】 血液透析装置2は、混合容器に塩化ナトリウムを主成分としてカルシウムを含有する透析用A原液を供給するA原液通路24と、上記混合容器に炭酸水素ナトリウムを主成分とする透析用B原液を供給するB原液通路25とを備え、上記A原液通路24およびB原液通路25のそれぞれにはA原液供給配管7およびB原液供給配管8が接続可能となっている。上記A原液通路24と上記廃液通路28とを連通させる迂回通路41を設け、上記A原液通路24およびB原液通路25を洗浄する際、上記A原液供給配管7から供給された洗浄液を、上記A原液通路24から上記迂回通路41を介して上記廃液通路28より排出する。【効果】 透析用A原液と透析用B原液とがほぼ原液のまま混合されてしまうことを防止することができる。【選択図】 図3
