| 摘要 |
The present invention is provided with a blood-removal-side pressure sensor (37) in a blood removal line, a blood pump (3), an artificial lung (2), a blood-transmission-side pressure sensor (38) in a blood transmission line, and a flow rate sensor (52), a discharge pressure (Pr) inherent to the blood pump (3) being calculated from the speed of the blood pump (3) and a blood flow rate (Q) measured by the flow rate sensor (52), the blood-removal-side pressure (Pv) measured by the blood-removal-side pressure sensor (37) being added to the inherent discharge pressure (Pr), an artificial-lung front pressure (Pm) between the blood pump and the artificial lung being estimated, and a notification that it is time to replace the artificial lung being issued when it is assessed that a numerical value based on the difference between the artificial-lung front pressure (Pm) and an artificial-lung rear pressure (Pa) which is a pressure value measured by the blood-transmission-side pressure sensor (38) exceeds a necessary threshold value. |
