Urine Anion Gap (for RTA diagnosis) Calculator
Differentiates renal vs. GI causes of normal AG acidosis
When to use it
Use to differentiate renal tubular acidosis from GI bicarbonate losses in non-anion-gap metabolic acidosis.
Category
Acute Kidney Injury (AKI) Workup
References
- Batlle DC et al. The use of the urinary anion gap in the diagnosis of hyperchloremic metabolic acidosis. N Engl J Med. 1988;318:594-9. PMID: 3344005
- Kamel KS et al. Use of Urine Electrolytes and Urine Osmolality in the Clinical Diagnosis of Fluid, Electrolytes, and Acid-Base Disorders. Kidney Int Rep. 2021;6:1211-1224. PMID: 34013099
About NephroMind
This calculator is part of NephroMind, a free clinical decision-aid platform from the Arab Society of Nephrology and Renal Transplantation (ASNRT) — over 128 bedside nephrology calculators plus a renal drug-dosing database, coded by a practicing transplant nephrologist.