Osswald H F, Asper R, Dimai W, Simon W
Clin Chem. 1979 Jan;25(1):39-43.
We describe a flow-through system with an ion-selective electrode for measurement of blood potassium ion concentration, continuously and on-line off the extracorporeal blood circulation in an operating theater during human open-heart surgery. Comparison measurements were made with the SMA flame photometer (blood plasma) and an Orion SS 30 sodium/potassium analyzer (whole blood). The potassium concentration values obtained with the flow-through system agree well with the ones determined with the flame photometer. The time delay of the measurement with the flow-through system was relatively long (2 min) but delays of only 10--20 s seem feasible. Short time delays can deepen insight and simplify rational treatment under surgery conditions.
我们描述了一种带有离子选择性电极的流通系统，用于在人体心脏直视手术期间，在手术室的体外血液循环之外连续、在线地测量血钾离子浓度。使用SMA火焰光度计（血浆）和奥立龙SS 30钠/钾分析仪（全血）进行了对比测量。通过流通系统获得的钾浓度值与用火焰光度计测定的值吻合良好。流通系统的测量时间延迟相对较长（2分钟），但仅10 - 20秒的延迟似乎是可行的。短时间延迟可以加深对手术情况的了解并简化合理治疗。
