Which disorder is defined by upper airway obstruction during sleep with snoring, snorting, breathing pauses, and daytime sleepiness?

• A. Attention-Deficit/Hyperactivity Disorder
• B. Central Sleep Apnea
• C. Sleep-Related Hypoventilation
• D. Obstructive Sleep Apnea/Hypopnea

Answer: (D)

This item centers on recognizing a sleep-disordered breathing pattern where the upper airway intermittently collapses during sleep, causing snoring, snorting or gasping, breathing pauses, and daytime sleepiness. This combination—noisy breathing at night with pauses and a day-to-day sense of tiredness from disrupted sleep—is classic for obstructive sleep apnea/hypopnea. In this condition, the person continues to attempt to breathe, but the airway obstruction blocks airflow, leading to repeated arousals and fragmented sleep, which wake the person enough to resume breathing. That repeated cycle drives the daytime sleepiness and fatigue.

Understanding the alternatives helps solidify why this is the best fit. Central sleep apnea involves pauses in breathing due to a loss of respiratory drive rather than an obstructed airway, so snoring and gasping are less typical and there isn’t the same pattern of airway collapse. Sleep-related hypoventilation centers on reduced ventilation with elevated carbon dioxide levels, often presenting with chronic hypoventilation rather than discrete apneas/hypopneas tied to snoring. Attention problems in ADHD can be associated with poor sleep, but ADHD itself is not defined by this respiratory pattern during sleep.