Sleep Centre

Program Overview: 

Our Sleep Centre is dedicated to diagnosing and treating patients with sleep-related disorders. These conditions include difficulties falling asleep and / or staying asleep at night, or difficulty in staying awake during the day. Sleep apnea - momentary cessation of breathing while sleeping - is one of the most common disorders. It can interrupt sleep hundreds of times a night. Some sleep disorders are potentially fatal. 

Symptoms of potential sleep disorders include:

  • Constant drowsiness
  • Irritability
  • Loud or irregular snoring
  • Difficulty breathing during sleep
  • Morning headache, sore throat or mouth dryness
  • Loss of energy

Services at the TADH Sleep Centre is provided by professionals experienced in sleep-related disorders and sleep-exacerbating diseases. 

Our centre has 6 private rooms, one for each person being tested. We provide a queen bed with all the linen. The rooms are quiet, darkened and air-conditioned. We also have washrooms and a shower.

When the patient arrives they are shown where they will sleep and asked to change into their sleepwear. Then they will have physiological sensors connected to their bodies by the technologist assigned to them. These are all non-painful and comfortable enough so that it will be possible to sleep. 

We use scalp electrodes, facial electrodes, chest electrodes, leg electrodes and a nasal airflow sensor. The polysomnography technologist applying the electrodes will be happy to answer any questions the patient may have. When the connections are complete, the patient is asked to lie down in their bed. At this time we check to see that all the sensors are working properly by having the patient perform some movements such as blinking, moving of legs, taking a deep breath, etc. Patients are permitted to sleep as they would at home, i.e. rolling over, personal pillows, bathroom breaks etc.

A technologist is ALWAYS present and able to provide assistance at any time (i.e. washroom). The overnight test lasts approximately 7 hours. Note: the technologist may, on occasion, enter the room to make some technical adjustments but we try to interfere as little as possible. We would like patients to enjoy uninterrupted sleep as much as possible. 

The study is interpreted following the overnight sleep session first by a technologist then by the physician.  

What to do (or not do) before coming for a sleep study:

  • Please eat a normal meal before 7 p.m.
  • DO NOT HAVE ANY CAFFEINE (coffee, tea, cola drinks, chocolate) after 12:00 p.m. noon on the day of the test
  • On the day of your test, please do not drink any alcoholic beverages (beer, wine, liquor, coolers, "hard lemonade", etc.) 
  • We strongly suggest you refrain from napping on the day of your test. If you have a tendency to feeling sleepy when you drive, please have someone else drop you off and pick you up the next morning.

Men: If you normally shave, please shave in the evening before you come to the lab. This will help us obtain better recordings. Patients with beards are not expected to shave. Wash your hair. 

Women: Wash your hair and abstain from using hair spray. Wash your face but do not use face cream or moisturizers. Wear little or no make-up.

What to bring when coming for a sleep study:

  • Appropriate sleepwear, something you feel comfortable in. Do not buy sleepwear for the occasion. Even sweatsuits are suitable.
  • You are also encouraged to bring your own pillow if it helps you sleep.
  • Personal toiletries, (toothbrush, comb, shampoo, etc.)
  • Any medication normally taken


The Sleep Laboratory offers services primarily to outpatients. These services include:

  • Polysomnographic study
  • CPAP titration
  • Bi-level titration
  • Multiple Sleep Latency Test
  • Maintenance of Wakefulness Test
  • On-site clinic
  • End tidal Collection
  • TC02 collection
  • Arterial Blood Gases
  • ECG
  • Vitals
  • Administering Medication
  • Record scoring
  • Patient Education
  • Quality Control
  • Equipment calibration
  • Vendor liaison
  • Patient follow-up
  • Infection Control
  • Use of Oxygen
  • Sleep deprived EEG

Referral Information: 

A physician referral is required; please bring your Ontario Health Card with you.