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Sleep Apnea

Poly-somnography - Procedures and indications

Do not forget your prescription

  • Arrival time is between 8:30 p.m. to 9:15 p.m. Please note that the bedtime hour varies, depending on how long it takes to set up. To make sure your test runs smoothly, please be sure to arrive on time for your appointment.
    • ​If your appointment is at 8:30 p.m., bedtime could be between 9:30 p.m. and 10:30 p.m.
    • If your appointment is at 9 p.m., bedtime could be between 10:30 p.m. and 11:30 p.m.
  • Upon arrival, a health professional will visit your room with you.
  • A short conversation will take place to explain how the test is performed in detail.
  • If you have not already done so, you will have to fill out a questionnaire about your sleep (remember to bring your list of medications).
  • In preparation for the test, several painless sensors will be applied to: your scalp, close to your eyes, hands and legs. We will follow your cardiac action and the oxygen rate in your blood throughout the night.
  • During the night, a professional will ensure the test is being performed correctly, the data is recorded and you are comfortable.
  • Waking time is scheduled between 6:00 a.m. and 6:15 a.m.
  • Shower available on site (including towels, soap and shampoo).


An official receipt will be given to you upon payment of the test.

To bring:

  • Pyjamas, slippers and your usual medication.


The interpretation of your test will be performed by one of our medical specialists. Your results will be sent by mail to you and your physician within 14 days after your appointment.

Split night

In some cases, it is possible to perform the analysis in two phases:

  • Phase 1 corresponds to the first part of the night in diagnosis mode (PSG).
  • Phase 2 corresponds to the titration period (dose-ranging study). This is to establish the optimal level of CPAP (Continuous Positive Airway Pressure) to correct the respiratory events observed during the first phase.

It is important to note that in treatment phase (phase 2), the health professional must have observed a minimum of respiratory events corresponding to the split night protocol, during the diagnosis part (phase 1).

To see how a polysomnography test is performed