Comparison of point-of-care versus central laboratory measurement of hematocrit, hemoglobin, and electrolyte concentrations

ABG analyzer significantly underestimates the values of Hb, Ht, Na+ and K+ compared to CL and almost 30% for all examined parameters are beyond USCLIA accepted biases. These data do not support widespread or even careful use of POCT for making diagnostic and treatment decisions until technology improves and results in improved outcomes.