What is the primary function of the anion gap in evaluating acid-base balance?

A To assess the severity of respiratory acidosis
B To estimate the concentration of unmeasured anions in the blood ✓
C To diagnose metabolic alkalosis
D To monitor the treatment of diabetic ketoacidosis

Explanation

The anion gap is a calculated measure that helps to identify the presence of unmeasured anions in the blood, which can aid in the diagnosis of certain acid-base disorders.

Mnemonic

Anion Gap = 'GAP' in knowledge about anions

Source

Guyton and Hall Textbook of Medical Physiology
Electrolytes and Acid-Base Balance Physiology Acid-Base Balance Medium MEDICAL Confidence: high