Problem to be solved: to provide a method of operating a raw liquid processing apparatus and a raw liquid processing apparatus capable of shortening the processing time of the raw liquid extracted from the patient's body, and further improving workability of the worker.An apparatus for concentrating the raw liquid to form a concentrated solutionFilter andConcentrator andRaw liquid supplyLiquid feed channelFilter liquid supply channelConcentration channel and waste liquid channelDelivery liquidA control unit for controlling the operation of the liquid feed portion so that the concentration of the concentrated solution becomes a predetermined concentration ratioAndDelivery liquidLiquid supply passage provided in the liquid feed channel and liquid feed passageA liquid feeding portion of a concentrated liquid passage provided in a concentrated liquid channel or a liquid waste passage feeding part provided in the waste liquid channelAndControl sectionThe operation of each liquid feed portion is controlled based on the pressure difference between the filaments of the filter and the differential pressure between the concentrators of the concentrator.Diagram【課題】患者の体内から抜いた原液の処理時間を短くすることができ、しかも、作業者の作業性を向上できる原液処理装置および原液処理装置の操作方法を提供する。【解決手段】原液を濃縮して濃縮液を形成する装置であって、濾過器と、濃縮器と、原液供給部と、給液流路と、濾過液供給流路と、濃縮液流路と廃液流路と、送液部と、濃縮液が所定の濃縮割合となるように送液部の作動を制御する制御部と、を備えており、送液部が、給液流路に設けられた給液流路送液部と、濃縮液流路に設けられた濃縮液流路送液部または前記廃液流路に設けられた廃液流路送液部と、を有しており、制御部は、濾過器の濾過器膜間差圧および／または前記濃縮器の濃縮器膜間差圧に基づいて各送液部の作動を制御する。【選択図】図１
