Maintenance of Wakefulness Testing (MWT)

The Maintenance of Wakefulness Test (MWT) is a test that helps determine a person’s level of alertness. It is often used to determine if a patient’s treatment for a sleep disorder is effective.

How is an MWT Useful?

The MWT tests your ability to stay awake and alert during quiet times of inactivity. This test is used as an alternative way of measuring your quality of sleep.

The test may be used as a way to diagnose a sleep disorder, or to assess the effectiveness of your current sleep disorder treatments. Measuring your ability to stay awake is often required for patients in public transportation, pilots or safety.

How Does MWT Work?

You will be asked to remain awake throughout the day. The test consists of four 40-minute trials that are conducted every two hours. During the trials, you will be sitting in a darkened room and you are encouraged to stay awake.

The test normally follows a nocturnal sleep study and in the morning the technician removes some of the wires from the sleep study.

What Can I Expect During My Test?

On the day of your test, you will be asked to refrain from stimulants such as coffee, tea, sodas or tobacco. Our friendly and knowledgeable staff will go out of their way to make you feel relaxed and we will even provide your meals during your stay.

After your test, a sleep technologist will look over your data and provide an assessment of your wake/sleep times. After reviewing the results, one of our sleep board certified physicians will consult with you about your MWT and treatment options.