Arterial Blood Gas Analysis · Pathology

The anion gap is calculated as:

  1. Na+ − (Cl− + HCO3−)
  2. K+ − (Cl− + HCO3−)
  3. Na+ + Cl− − HCO3−
  4. Na+ − (Cl− + K+)
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Correct answer: Na+ − (Cl− + HCO3−)

The anion gap is calculated as Na+ − (Cl− + HCO3−). It helps differentiate types of metabolic acidosis.

Difficulty: Medium Question 9 of 20

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