Renal Equations
Anion Gap
[Na] - ([Bicarb] + [Cl])
[Na] - [Bicarb] - [Cl]
Osmolal gap should be calculated in a patient with anion gap metabolic acidosis and suspected ingestion.
Osmolal gap = Measured serum osmolality - Calculated serum osmolality
Calculated serum osmolality
calculated serum osmolality = (2*Na) + (glucose/18) + (BUN/2,8)








