BLOOD PURIFICATION DEVICE

To provide a blood purification device capable of measuring a real blood flow rate by using one concentration measurement part while reducing over-concentration or an abrupt decrease in circulation blood amount.SOLUTION: A blood purification device 100 includes: a blood circuit 110; a blood purifier 120; water-pouring means of pouring water in the blood circuit 110; a measurement part 115 which is arranged at a position where blood concentration changes as water is poured by the water-pouring means in the blood circuit 110 and measures blood property that changes as blood concentration changes; and a controller 150. The controller 150 is provided with an actual blood flow rate calculation part 151 which calculates actual blood flow rate on the basis of measurement value before pouring water by the water-pouring means measured by the measurement part 115, measurement value after pouring water, and an amount of poured water by the water-pouring means.SELECTED DRAWING: Figure 4 【課題】過濃縮や循環血液量の急激な低下を低減しつつ、１つの濃度測定部を用いて実血流量を測定可能な血液浄化装置を提供すること。【解決手段】血液回路１１０と、血液浄化器１２０と、血液回路１１０に注水を行う注水手段と、血液回路１１０における注水手段による注水により血液濃度が変化する位置に配置され、血液濃度に応じて変化する血液性状を測定する測定部１１５と、制御装置１５０と、を備える血液浄化装置１００であって、制御装置１５０は、測定部１１５で測定された注水手段による注水前の測定値、注水後の測定値及び注水手段による注水量に基づいて実血流量を算出する実血流量算出部１５１を備える。【選択図】図４