Anion Gap 4 Measurement

**Semantic type:** Laboratory Procedure

**Definition:** The determination of the amount of unmeasured anions (computed as the difference between the sum of serum sodium and serum potassium, and the sum of the serum bicarbonate and chloride) present in a sample.

**Synonyms:** - ANIONG4 - Anion Gap 4 - Anion Gap 4