Medical Emergencies · single question
What is the gold standard diagnostic study for sleep apnea?
Show answer and explanation
Correct answer: A. Overnight polysomnography (PSG)
Overnight polysomnography (in-lab sleep study) is the gold standard — simultaneously records EEG, eye movements, muscle activity, heart rhythm, breathing, and oxygen levels.
- A. ✅ CORRECT – Overnight in-lab polysomnography is the gold standard for sleep apnea diagnosis.
- B. ❌ Epworth is a symptom screening questionnaire; not diagnostic.
- C. ❌ Home sleep testing is simpler but lacks full polysomnography capability.
- D. ❌ Daytime pulse oximetry cannot diagnose sleep apnea.
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