Sleep Studies

What is a Sleep Study?


A sleep study, or Polysomnogram, measures many of the body’s physiological activities while sleeping. During a sleep study there is complex monitoring and recording of:

  • Breathing

  • Oxygen levels

  • Leg movements

  • Brain wave activity

  • Eye movements

  • Heart rate

  • Body position

These signals are recorded to identify the different sleep stages and how the body responds physiologically during the night. This enables accurate diagnosis of various sleep problems.

Why am I having a Sleep Study?


You may have been referred to have a sleep study because there is evidence of:

  • excessive daytime tiredness

  • snoring

  • experiencing the sensation of choking while asleep

  • someone has witnessed that you stop breathing during your sleep

  • restless legs

  • difficulties falling asleep, or difficulties getting back to sleep during the night

  • waking unrefreshed

  • morning headaches

Or you may have other conditions that are caused, or worsened by, a sleep disorder such as:

  • High blood pressure

  • Cardiac disease

  • Heart failure

  • Diabetes

  • Obesity

  • Stroke

Attended Level-1 Sleep Studies

If you are referred for an attended Level-1 sleep study, you will be admitted to one of our sleep centres for an overnight stay. Sleep Technologists will be with you throughout the process, providing education and the setup for the overnight sleep study. They will also monitor you throughout the entire night to ensure comprehensive collection of data and your well being. (Check out the video below for insight into what to expect when attending a sleep centre)


You may also be referred to attend a sleep centre for a CPAP titration sleep study. A CPAP titration sleep study is for patients previously diagnosed with Obstructive Sleep Apnoea (OSA). CPAP (Continuous Positive Airway Pressure) is used to manage OSA. It is important to trial this treatment in a sleep centre (rather than at home), as this allows an accurate analysis of pressure requirements to treat your OSA, comprehensive education on the treatment and the trial of different masks for your therapy. We are also able to ensure there are no other remaining causes of sleep disturbance dspite being on CPAP therpay (e.g. persistent periodic limb movement disorders, or an emergence of central sleep apnea). 

If you are currently using CPAP and require a follow-up sleep study to assess whether current treatment parameters are effective, please bring your own CPAP mask (and chinstrap if you use one) on the night of your sleep study.

When you are booked for an attended Level-1 sleep study, our admin team will provide you with more information about the process and what to bring on the night.


Home Sleep Tests


If you are referred for a home sleep test, your doctor believes that you either fit the criteria to have a Level-2 sleep study conducted at home, or that you have a high probability of moderate-to-severe Obstructive Sleep Apnea. (OSA).

A home sleep test is not as comprehensive as an attended Level-1 sleep study, however they can be effective in diagnosing moderate-to-severe OSA.

A home sleep test involves attending a Sleep Health Group location, or an approved Sleep Health Group partner, to be set-up with sleep study equipment that you will wear home for that night’s sleep.

The equipment is returned in the morning, where the data collected is downloaded and sent to Sleep Health Groups Sleep Physicians for analysis.

Depending on what is found from your home sleep test, you may be referred back to your GP to discuss the results, or if the home sleep test confirmed significant OSA, you may be recommended an attended Level-1 CPAP titration sleep study for the trial of treatment.

When you are booked for a home sleep test, our admin team will provide you with more information about the process and what to bring with you for the equipment set-up.

Information on how to arrange your sleep study.