Sleep study

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Sleep studies are tests that record the body activity during sleep. They are helpful in identification of sleep disorders. Polysomnography, a type of sleep study, is the gold standard to rule out obstructive sleep apnea. If a home study does not find obstructive sleep apnea, but the patient still complains of unrefreshing sleep and daytime sleepiness, an in-lab polysomnogram may be necessary to find other possible disorders.[1]


Sleep studies can help diagnose or rule out:


The most common sleep studies are:

Simple sleep study[edit]

It is a simple sleep study done within the home premises.[1]


Polysomnography records several body functions during sleep, including brain activity, eye movement, oxygen and carbon dioxide blood levels, heart rate and rhythm, breathing rate and rhythm, the flow of air through the mouth and nose, snoring, body muscle movements, and chest and belly movement.[3]

Multiple sleep latency test (MSLT)[edit]

The MSLT measures, by several nap opportunities in one day, how long it takes a person to fall asleep. It also determines whether REM sleep appears upon falling asleep.[3][4] It is usually performed immediately after an overnight study.

Maintenance of wakefulness test (MWT)[edit]

This test measures whether a person can stay awake during a time when she or he is normally awake.[3][4]

See also[edit]


  1. ^ a b c O'Brien, Sharon M. "Polysomnography vs. the home sleep study: Which is better?". Clinical Advisor. Retrieved 27 December 2012. 
  2. ^ a b c d e "What Are Sleep Studies?". National Heart, Lung and Blood Institute, U.S. Department of Health & Human Services. Retrieved 27 December 2012. 
  3. ^ a b c d e f g h i j "Sleep Studies". WebMD. Retrieved 27 December 2012. 
  4. ^ a b "Medicaid and Health Choice and Clinical Coverage Policy No.: 1A-20" (PDF). NC Division of Medical Assistance Sleep Studies Polysomnography Services. Retrieved 27 December 2012. 

External Sources[edit]