urine anion gap
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urine anion gapAbbreviation: UAG
The sum of the concentrations of sodium and potassium in a specimen of urine, minus the urine chloride concentration. The UAG is used to assess the source of a metabolic acidosis. A positive value indicates the kidney is responsible for the acidosis. A large negative value indicates the kidneys are compensating for a metabolic acidosis caused by other organs.
See also: gap