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

A To measure the difference between the sum of cations and anions in the blood ✓
B To calculate the concentration of bicarbonate ions in the blood
C To assess the severity of metabolic acidosis
D To evaluate the effectiveness of renal function

Explanation

The anion gap is a calculated measure that helps to identify the type of acid-base disturbance and guides further evaluation and management.

Mnemonic

Gap = Difference → anion gap measures difference between cations and anions

Source

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