Stool Osmolar Gap Calculator
Differentiates osmotic vs. secretory diarrhea
When to use it
Use to differentiate osmotic diarrhea from secretory diarrhea.
Category
Electrolytes & Acid-Base
References
- Eherer AJ et al. Fecal osmotic gap and pH in experimental diarrhea of various causes. Gastroenterology. 1992;103:545-51. PMID: 1634072
- Mayo Clinic Laboratories. Osmotic Gap, Feces (OSG_F). Laboratory Service Report sample. 2021
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.