Polysomnography, also called a sleep study, is a test used to diagnose sleep disorders. Polysomnography records your brain waves, the oxygen level in your blood, heart rate and breathing, as well as eye and leg movements during the study.

Polysomnography is usually done at a sleep disorders unit within a hospital or at a sleep center. The test records your nighttime sleep patterns. Polysomnography is occasionally done during the day to accommodate shift workers who habitually sleep during the day.

In addition to helping diagnose sleep disorders, polysomnography may be used to help adjust your treatment plan if you’ve already been diagnosed with a sleep disorder.

Important Things to Know About Sleep Studies

  • A sleep study is done to look at your sleep. Your
    doctor will be able to work out if you have a sleep
    problem and, if so, what it is.
  • The sleep study can be done either at home or by
    staying overnight in a sleep centre.
  • Together, you and your doctor will decide where
    the sleep study should be done
  • It lasts one night. During this time you will wear
    leads to record information on how you sleep.
  • If you think that you need to do a sleep study, talk
    to your doctor about a referral.


What should you bring?

  • Prescription and non-prescription medications including insulin and syringes (you will need to administer all of your medications yourself).
  • Two-Piece pajamas (We do not provide gowns or other forms of bed clothes).
  • Change of clothes, Special pillows, blankets, toiletries, hair dryers, or other hygiene items that you may be used to.
  • If you’re currently use CPAP or Bi-Level PAP (BiPAP) equipment, please bring your mask, headgear, and chinstrap (if you have one) with you to the Sleep Centre. You DO NOT need to bring your machine to the sleep Centre.
  • If you forget any of the prescriptions or supplies (such as syringes) you will need to arrange to purchase them from a local pharmacy or have someone to bring them to you.We are not able to provide or dispense any other routine or maintenance medications, syringes, or other medical supplies.Please, DO NOT bring any heating pads or electric blankets as these interfere with our sensitive recording equipment.

What do I need to do?
PRIOR TO the day of your study:

  • Notify the sleep Centre if you have any specific needs as soon as possible (see below)

**If you need to cancel your sleep study please call 2 business days prior to your test date to avoid a cancellation fee. **

Day of your study:

  • Eat Supper before you arrive at the Sleep Study Centre.
  • Do not drink any caffeine after 12:00 Noon. This includes: coffee, tea, chocolate, cocoa, and soda. You may drink caffeine-free sodas and/or decaffeinated coffee.
  • Do not drink any alcohol 12 hours before your sleep study, unless otherwise directed by your physician.
  • Wash and dry your hair and face before the study.
  • Men: If you have a beard, it will not be a problem. If you are normally clean shaven, please shave before you come to the Sleep Health Centre.
  • Please do not use any conditioner, gel, mousse, hairspray, or body lotions before your test.