Rhenis Nursing Rhenis Nursing
NCLEX-RN Practice Exam 1
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Hint : 😤Consider how ventilation rate alters CO₂ levels and thereby shifts blood pH.

Correct Answers:

  • respiratory alkalosis.


Rationale :

🧪The pH of 7.49 is above the normal range (7.35–7.45), indicating an alkalotic state.

🫁The PaCO₂ is low at 30 mm Hg (normal 35–45 mm Hg), reflecting hyperventilation and excessive CO₂ elimination.

⚖️The HCO₃⁻ is within normal limits (22–26 mEq/L), showing no primary metabolic disturbance.

🔍These values point to a primary respiratory origin for the alkalosis rather than a metabolic cause.

📌Core Message

Low PaCO₂, elevated pH, normal HCO₃⁻ → respiratory alkalosis.

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