EXTRACORPOREAL BLOOD CIRCULATING DEVICE, CLOSED BLOOD STORING TANK AND EXTRACORPOREAL BLOOD CIRCULATING METHOD

摘要

A device comprising a closed blood storing tank (20) in which a blood storing chamber (3) and a capacity regulating chamber (4) formed by partitioning a closed space formed by a housing (1) are disposed adjacent to each other, a regulating liquid tank (21) connected to the capacity regulating chamber, for storing a regulating liquid (21a), and a blood pump (22) connected with the blood storing chamber. In the housing, a blood in-flow port (5) and a blood out-flow port (6) are provided to communicate with the blood storing chamber, and a regulating port (7) for charging or discharging a regulating liquid is also provided to communicate with the capacity regulating chamber. The blood pump is connected via the out-flow port, and the regulating liquid tank is connected via the regulating port. The blood storing chamber and the capacity regulating chamber are formed by partitioning the closed space by a flexible partitioning member (2), and the regulating liquid tank and the regulation port are connected together by a pipeline member (23) having a flow rate regulating structure. A stored blood amount can be controlled to an optimum one during a process from prior to the start to the end of an extracorporeal blood circulation, enabling an easy regulation.