A patient's serum values are Na⁺ 141 mmol/L, Cl⁻ 98 mmol/L and HCO₃⁻ 19 mmol/L. What is the anion gap?

Answer and explanation

Correct answer: D. 24 mmol/L

  1. Step 1: Anion gap .
  2. Step 2: mmol/L.
Answer
24 mmol/L.
Why not the others: 43 mmol/L: Bicarbonate was not subtracted. 158 mmol/L: The three ions were added. 79 mmol/L: Only chloride and bicarbonate were compared.

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