| 摘要 |
PURPOSE: To detect the sodium concentration of blood simply, quickly and stably by detecting the conductivity of a dialysis fluid balanced with plasma by designated work. CONSTITUTION: The value of a curve I measured by a conductometer 7 starts to change the moment when the conductivity at the time of inflow into an exchanger is t0, and the conductivity of a dialysis fluid at the time of outflow from the exchanger is measured by a conductometer 8 and a curve O starts to change at the moment of t1. This time lag TL is the amount of time required for changing the conductivity measured by the conductometer 7. A monitor device 9 compares each value of conductivity of dialysis fluid measured at the time of outflow from the exchanger 1 by the conductometer 8 at the moment of t with the corresponding conductivity at the time of inflow into the exchanger, that is, the value measured by the conductometer 7 at the moment of t'=t-TL to detect the conductivity of a dialysis fluid balanced with plasma. The conductivity of a dialysis fluid varies with the sodium concentration, so first the conductivity of a dialysis fluid is converted to sodium concentration and then to the sodium concentration of blood. |
