Last Updated on August 19, 2026
Table of Contents
Introduction
•
Osmolal gap
mmol/L mmol/L mmol/L
= measured serum osmolality – calculated serum osmolality×Osmolal gap
• Calculated serum osmolality = 2[
Na
+] +
Glucose
×
+
Urea
××
• Marked increased osmolal gap (>25 mOsm) is pathognomonic of toxic alcohol poisoning!