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Cardiorespiratory Polygraphy

What is a cardiorespiratory polygraphy?

Cardiorespiratory polygraphy evaluates whether you have obstructive sleep apnea (upper airway blocked during sleep). It is done in your home during a full night’s sleep with a portable device from one of Biron's clinics. The device records the following physiological data:

  • Respiratory effort
  • Heart rate
  • Body position
  • Nasal flow
  • Snoring
  • Oxygen in the blood

Cardiorespiratory polygraphy only records cardiorespiratory signals during sleep. This test is indicated for patients with multiple sleep disorder symptoms.

Specificities and Contraindications

The in-home test should not be done on a patient who is confused, unable to handle the equipment, or whose health is unstable.

Preparing for the Examination

To create the optimal conditions for a successful exam, important instructions will be sent to you when you make your appointment.

A quick appointment, and simple and effective advice

During your appointment, our respiratory therapist trained in sleep care will explain explain how the portable device works and how to do the test. You will put the device on before you go to bed and take it off in the morning. To obtain good results, you must wear the device for at least five hours. This will leave you sufficient time to do do the procedure and return the device the next day.

At your appointment, you will receive a carrying case containing all the materials and instructions needed to install the equipment. In addition, a video will guide you step by step during the installation.

The longer you wear the device, the more the recorded data will allow a representative diagnosis. It is recommended that you wear the device for at least five hours.

Following your diagnosis, you will have a personalized meeting with a respiratory therapist. This meeting will complete the assessment of the signs and symptoms associated with your sleep disorder.


The results of the sleep test will be interpreted by one of our specialist physicians trained in sleep health and will be available via MonBiron.

A medical prescription is required to perform this examination.

If your healthcare professional has prescribed this examination or if you have any questions, contact us at 1 833 590-2715.