A sleep study is useful for proper evaluation of:
- possible sleep related breathing disorders e.g. sleep apnea;
- disorders of excessive daytime sleepiness e.g. narcolepsy;
- abnormal movements in sleep e.g. restless legs syndrome;
- unusual paroxysmal events in sleep e.g. sudden uncontrollable outbursts of crying or agitation
An accurate diagnosis is necessary for optimal prescription of treatment plans. A sleep study may also be used to initiate and adjust treatments, such as continuous positive airway pressure therapy or oxygen therapy, after a sleep disorder is diagnosed.
A daytime nap study or mean sleep latency test, that measures how quickly one falls asleep in a quiet environment during the day, is sometimes required to evaluate disorders of excessive daytime sleepiness.