In-Lab Sleep Testing

In-Lab Sleep Study (Polysomnogram)

These overnight studies take place during your normal sleeping hours, which may be during the night or day. Some of our locations are open 24 hrs, 7 days a week for your convenience. At the sleep center, you will undergo a polysomnography, which is a painless test that monitors sleep patterns and other body functions. Sleep studies are available at several of our locations.

What happens during a sleep study?

  • The patient arrives at the center approximately two hours before bedtime.
  • Monitoring devices, which normally do not interfere with sleep, are attached.
  • The patient falls asleep, undisturbed in a private, hotel-like bedroom.
  • A staff member, who is available via an intercom, monitors the devices in an adjacent room throughout the night.

The results from your sleep study will usually be taken by a technologist, and later evaluated by your doctor. This may take up to two weeks, when you'll schedule a follow up visit to discuss the results and treatment options.

What types of sleep studies are there?

There are several types of in-lab sleep studies:

  • Diagnostic polysomnogram – During this study, we monitor your sleep and breathing and can evaluate behaviors during sleep. This test is often used to see if you have obstructive sleep apnea.
  • Titration study – This study is used to calibrate continuous positive airway pressure (CPAP) therapy. You will sleep with a CPAP device (or another Positive Airway Pressure Device such as BiPAP) and our certified sleep technologists will adjust the settings to treat your breathing problem.
  • Split-night study – This study combines the diagnostic polysomnogram on the first part of the night and Positive Airway Pressure titration in the second part of the night. In some cases, required criteria may not be met in the first part of the night and you may need to return to complete the CPAP titration.
  • Multiple Sleep Latency (MSLT) and Maintenance of Wakefulness Test (MWT) – These tests are performed during day, typically following an overnight study, to measure how quickly you fall asleep or to measure how alert you are doing the day. Many times you will need to stay in the sleep laboratory up to 24 hours to complete the overnight testing and the daytime naps testing.

How do I prepare for the in-lab sleep testing?

This is an outpatient test – nursing and medications are not provided. Please bring your regular medications with you. Bring only the medications you will be taking while you are here. Medications will be held by technical staff during your visit per Hospital Policy.

On the day of the test, please avoid alcoholic beverages. Avoid anything containing caffeine after 5pm (i.e., coffee, tea, chocolate, cola, etc.) Avoid taking any naps on the day of your test.

Bring pajamas or some form of sleep wear. Female patients are asked to wear 2 piece. sleepwear or a short nightgown due to the need to tape monitors on the chest and abdomen.

Bring personal toiletries and any change of clothes you wish.

Several small gold electrodes will be taped or glued to different areas of your body and head. The skin will not be punctured. Although the glue will not in any way damage your hair, it will disrupt your hairstyle. Tape removal after the test may be momentarily uncomfortable for some individuals. Also, do not wear a dark nail polish on your fingernails as it may affect some of the signals we record.

For patients under 18 years old, a caregiver or family member will be required to stay overnight.

Please alert our staff to any special needs you may have prior to your sleep study. These may include: wheelchair assistance, inability to understand or speak English, or need someone to stay to assist patient due to age or disability.

Instructions for Sleep Study patients

Henry Ford Sleep Labs and Clinic locations
With locations across metro Detroit, many of our sleep medicine centers, clinics, and laboratories, are AASM accredited.