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Daily #229 · Fluid & Electrolytes · Archive

NCLEX-RN® question of the day

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The question

A client is brought to the emergency department after a witnessed cardiac arrest. Resuscitation efforts are ongoing, and the team obtains an arterial blood gas (ABG) during CPR. The results show: pH 7.18, PaCO2 58 mmHg, HCO3 18 mEq/L, PaO2 62 mmHg on 100% oxygen via bag-valve mask. Which interpretation of this ABG is most accurate?

  1. Mixed respiratory and metabolic acidosis
  2. Respiratory alkalosis with metabolic compensation
  3. Respiratory acidosis with metabolic alkalosis
  4. Metabolic acidosis with full respiratory compensation
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