Anion gap

Serum anion gap (albumin-corrected)

Sorts a metabolic acidosis into high-gap or normal-gap, corrected for albumin. Na − (Cl + HCO3), adjusted to an albumin of 40; normal about 4 to 12 mmol/L.

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Appears in these tutorials

See this calculator worked on a real patient, then read the teaching around it.

Diabetic ketoacidosis02_002
Worked example: Danni Tucker, 23
Open tutorial
Poisoning and drug overdose11_026
Worked example: Jarrod Douglas, 46
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Acid-base disorders15_100
Worked example: Vanessa Yazbeck, 53
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Metabolic acidosis15_101
Worked example: John Gibson, 22
Open tutorial