JOURNAL ARTICLE
REVIEW

Use of the DeltaAG/DeltaHCO3- ratio in the diagnosis of mixed acid-base disorders

Asghar Rastegar
Journal of the American Society of Nephrology: JASN 2007, 18 (9): 2429-31
17656477
When a strong acid is added to plasma, one expects a quantitative relationship between excess anion gap (DeltaAG) and bicarbonate deficit (DeltaHCO(3)(-)) with the DeltaAG/DeltaHCO(3)(-) ratio close to unity. If true, then this ratio could be used to diagnose mixed acid-base disorders in patients with metabolic acidosis. Although the mean ratio in selected patients is close to unity, this ratio also has a wide range, making its use in individual patients problematic. The ratio should therefore be used cautiously in making a diagnosis of mixed acid-base disorders.

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