What is the diagnostic test for pediatric obstructive sleep apnea described?

What is the diagnostic test for pediatric obstructive sleep apnea described?

• A. Blood test
• B. Sleep diary
• C. Polysomnography
• D. MRI

Answer: (C)

Polysomnography is used because it records multiple signals throughout sleep to detect real obstructive events and measure their impact. It combines brain activity, eye movements, and muscle tone to determine sleep stages, with simultaneous monitoring of airflow, respiratory effort, and oxygen saturation (often plus heart rate and sound of snoring). This lets clinicians calculate how often breathing pauses occur per hour (the apnea-hypopnea index) and see whether events are obstructive, mixed, or central, as well as how much they fragment sleep and lower oxygen levels. These objective measurements during actual sleep are what confirm a diagnosis of pediatric obstructive sleep apnea and help gauge its severity, guiding treatment decisions. Blood tests don’t assess breathing during sleep, a sleep diary records patterns rather than physiologic events, and MRI shows anatomy but not functional airway collapse during sleep.