Sleep laboratory

Hôpital Montfort’s Sleep Laboratory features state of the art equipment, and specializes in diagnosing, assessing and treating sleep disorders. 

What is a sleep study?

A sleep study, or polysomnogram, is a test to determine if you suffer from a sleep disorder, such as insomnia, sleep apnea, narcolepsy or involuntary limb movement. Patients spend one night at the Sleep Laboratory while specialists analyze their sleep in order to identify the exact nature of the sleep disorder. 

How do you prepare for a sleep study?

At any point, inform the Sleep Laboratory if you have any special needs. 

The day of your sleep study

  • Avoid taking a nap.
  • Do not take any caffeine in the four hours prior to your appointment. 
  • Take your medications as usual, unless otherwise indicated by your physician. 
  • Take a shower of a bath before coming to the hospital. 
  • Do not apply any cream or lotion to your face. 

What should you bring with you?

  • Your health card.
  • Comfortable clothing, preferably pyjamas. Some people prefer to bring their own pillow. 
  • An up-to-date list of your medication.
  • The medications you take at bedtime, at night or early in the morning. The Sleep Laboratory does not supply medications. 
  • If you are diabetic or think that you might get hungry during the night, bring a snack. 
  • Forms of entertainment to keep you occupied during wait periods.
  • Personal hygiene items (toothbrush, soap, etc.).
  • Money or a credit card to pay for parking.

Where is the Sleep Laboratory located?

The Sleep Laboratory is located on Level 1, Wing B. 

If your appointment is during the day, go to Room 1B360. 

If your appointment is at night, or you are coming to spend the night, go to Room 1B164. 

Arrive 15 minutes before the time of your appointment.  

What happens during my sleep study?

  • The technologist will receive you, explain what will happen during your visit, take you to your room, and get you prepared for the night. 
  • Electrodes and sensors will be applied to your head, face, chest and legs. These sensors enable us to monitor your sleep, breathing, level of oxygen and movements. This step takes 30 to 45 minutes. 
  • During the night, the technologist is in an adjacent room. He or she controls the equipment and ensures the recording quality so that the physician can make an accurate diagnosis. 
  • The technologist is always present in the Sleep Laboratory and is available if you require assistance, or wish to use the washroom. 

What happens after my sleep study?

  • The sleep study ends around 6:00 in the morning. At that point, the technologist will wake you up and remove the electrodes. You can then go home.
  • Showers are available should you wish to take one before leaving. 
  • The results of your sleep study will be sent to your physician. Based on these results, the Sleep Lab specialist will recommend appropriate treatments and therapies to your physician. 

Other tests at the Sleep Laboratory

Based on your results, other tests may be suggested.

The CPAP titration study

The continuous positive airway pressure test (CPAP) is conducted if you suffer from sleep apnea. The CPAP is administered through a nasal mask. A technologist adjusts the support pressure during the night, which allows you to breathe normally, and improves the quality of your sleep. 

The Multiple Sleep Latency Test (MSLT)

The MSLT involves recording your brain activity during the day to measure your degree of drowsiness. To conduct this test, you must lie down and take a nap, every two hours. You must take four or five naps in total. This test determines the time it takes you to fall asleep, at different times during the day. 

The Maintenance of Wakefulness Test (MWT)

The MWT involves recording your brain activity during the day to measure how alert you are at different times throughout the day. To conduct this test, you sit in a comfortable, reclining chair, in a dimly lit room. The test is carried out over four rest periods of 40 minutes each, every two hours. 


Please note that a medical referral is mandatory.   
Referral form



Telephone number: 613-748-4990 
Fax: 613-748-4975

Patients with an appointment at Hôpital Montfort will receive an automated confirmation call up to 5 days prior to their appointment.