Sleep Disorders Center Tests & Procedures

The Sleep Disorders Center is committed to making a thorough assessment of your child's sleep issues so that we can fully understand their condition and create a treatment plan. The Sleep Disorders Center offers a variety of testing procedures to help diagnose various sleep disorders.


An overnight polysomnogram (PSG), also known as a sleep study, is used to diagnose sleep disorders.  Most polysomnograms are performed in the sleep lab. Polysomnography records brain waves, eye movements, muscle tone, oxygen and carbon dioxide levels in your blood, heart rate and rhythm, breathing and leg movements.  The test also records nighttime sleep patterns.  A technologist monitors the patient throughout the entire procedure, including audio and video.

Multiple Sleep Latency Test

This test is an objective measurement of the tendency to fall asleep during the daytime after a good night’s sleep. This test is particularly valuable in diagnosing narcolepsy. The patient is given multiple opportunities to fall asleep during the daytime during this test.

Maintenance of Wakefulness Test

The Maintenance of Wakefulness Test (MWT) is used to measure how alert you are during the day. It is an indicator of how well you are able to function and remain alert in quiet times of inactivity. The MWT is used to see if someone with a sleep disorder is responding well to treatment. It is also used to help decide whether a person is too tired to drive or perform other daily tasks.

Portable Polysomnogram

This polysomnogram (sleep study) is the same as above except a portable sleep system is used so the test can be done on the nursing unit while the patient is admitted to the hospital. 


Actigraphy is worn like a watch on the wrist and is used to assess cycles of activity and rest over several days or weeks.  It measures activity through light and movement.