Abstract :
Introduction: Purpose of our research study was to sort out differences in levels of Na and K in blood
sample from venous and arterial system, collected simultaneously in severely diseased patients.
Materials and Methods: In our cross section compar ative research study, total 100 p atients admitted
in intensive care unit were analyzed for measurement of sodium and potassium levels from arterial and
venous blood samples collected from femoral ar tery by heparinised syringe and from median cubital vein
by red vacutainer correspondingly at the similar time. ABG Analyzer machine was used for measurement
of electrolytes from arterial blood, while ISE Electrolyte analyzer machine w as used for measurement of
electrolytes from venous blood.
Result: Potassium of venous blood sample (4.49 0.63 mmol /l) was significantly higher as compared to
arterial blood sample (4.02 0.59 mmol /l). The mean sodium of venous blood sample (139.86 mmol/L)
was significantly higher than arterial blood sample (136.32 mmol/L). The mean Bias for potassium and
sodium 0.15 mmol/l and 1.54 mmol/ l correspondingly.
Conclusion: Arterial Blood Gas analyzer is not comparable to Electrolyte analyzer machine for
measurement of Na and K levels. Arterial Blood sample analyzed by Arterial Blood Gas analyzer
cannot substitute venous blood sample analyzed by electrolyte analyzer for electrolytes analysis, even if
TAT (Turn Around Time) of Arterial Blood Gas analyzer is low.
Keyword :
Sodium, Potassium, ABG analyzer, Electrolyte analyzer, Arterial blood, Venous blood