Table 3: Differences in anion gap (AG) between the two analyzers for samples from patients with severe acidemia, end-stage renal disease, and lactic acidosis.

Patient cohortDifference in AG (cAG − gAG)

Severe acidemia 5.0 ± 4.0 (1.0–24.0)

End-stage renal disease 4.6 ± 3.8 (1.0–24.0)

Lactic acidosis 6.3 ± 3.9 (1.0–13.0)

Values are means ± SD (range). cAG = Na+ (Central analyzer) − Cl (Central analyzer) − bicarbonate , gAG = Na+ (Blood gas analyzer) − Cl (Blood gas analyzer) −   .