Background:
The arterial blood gas analysis (ABGa) results are important to acid-base unbalanced patients. Nowadays some ABGa analyzers can measure electrolytes, hemoglobin, lactate and etc. This accessory ABGa results are good to evaluate patients and
indicate
parameters how to treatment. But many clinicians complained about sodium and potassium results between arterial whole blood and venous serum. We evaluated howmuch analytic gaps between arterial whole blood on blood gas analyzer (288 Blood Gas
System
Ciba-Coring diagnostic, USA) and venous serum on electrolyte analyzer (NOVA 6, NOVA Biochemical, USA) and tried to find method to minimize analytic gaps.
Methods:
The venous and heparinized arterial bloods were sampled at the same time and measured sodium and potassium its analyzer. Both analyzers used same measured method.
Results:
All results of venous sera sodium and potassium are higher than those of arterial whole bloods. The arterial whole bloods and venous sera sodium of the mean and standard deviation (1 SD) are 132.9±4.50 mmole/L and 140.7±4.52 mmole/L
respectively.
The arterial whole bloods and venous sera potassium of the mean and standard deviation (1 SD) are 3.54±0.47 mmole/L and 4.10±0.46 mmole/L respectively. but control materials had no significant analytic gaps on both analyzers. The correlation of
288
Blood Gas System with NOVA 6 were good linearity maintained and correction equations are below.
Y=0.850869x + 27.628354 (r=0.84541, p<0.001, n=98) [sodium; y: Venous serum, x: Arterial whole blood]
y=0.948106 + 0.744038 (r=0.965681, p<0.001, n=98) [Potassium; y: Venous serum, x: Arterial whole blood]
Conclusions:
On above correction equations, it will minimize analytic gaps and effective results to care patients.
|