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Overnight sleep study

Overnight sleep studies are carried out at your hospital or sleep clinic. Sensors will be attached to your body to record information while you sleep overnight in the clinic. This is a non-invasive and painless procedure.

What is it?

An overnight or in-lab sleep study is conducted by highly trained sleep professionals who monitor your sleep using sensors that record information. A non-invasive and painless procedure, patients spend the night away from home in a hospital or clinic under our professional care. Results are generally available within approximately 10 working days of the study through your regular GP and will help determine a course of action to improve your quality of sleep.

  1. Conducted in hospital or clinic

  2. Sensors used to monitor sleep patterns

  3. Non-invasive and painless

If you are having trouble with sleeping and getting enough rest during the night, your doctor may refer you to a sleep professional to investigate the cause. Your sleep specialist can identify contributing factors and diagnose a number of sleep disorders.

If you have been diagnosed with sleep apnoea, your specialist may recommend a CPAP (continuous positive airway pressure) study. This involves pressurised air being gently pumped through a mask that covers your nose and/or mouth. The air pressure is monitored and adjusted during the study to prevent snoring, apnoea, other breathing irregularities and improve blood oxygen levels and sleep quality.

For some sleeping disorders, your specialist may recommend a test using a BiLevel device. As with the CPAP study, a BiLevel device pumps pressurised air through a mask that covers your nose and/or mouth, but delivers different pressure settings for breathing in and breathing out. This allows sleep specialists to gather specific information to assist with treatment options.

  • Overnight sleep studies require you to spend the night at your hospital or sleep clinic under the care of a sleep professional.
  • The procedure requires sensors and leads to be attached to different parts of your body to record information, along with audio-visual and body-position monitoring while you sleep. It is non-invasive and painless.
  • The overnight stay generally lasts approximately 12 hours (usually from 7:00pm to 7:00am) – however may vary between clinics.
  • Our team of highly trained sleep technicians, nurses, scientists and physicians use the information gathered to identify and investigate any issues during your sleep and how they may affect your body. Someone is available throughout the night should you need assistance or have any concerns.

How should I prepare?

  1. Stick to your normal routine on the day, including eating and drinking as usual (including tea and coffee or other caffeine-based stimulants)

  2. Take all regular medications as prescribed unless advised otherwise by your doctor

  3. Shower, shampoo and dry your hair to help with adhesion of sensors to your skin and scalp

  4. Remove any make-up, hair pieces and nail polish, and refrain from using other hair and skin products and moisturisers

  5. Bring your usual sleepwear and toiletries with you, and a favourite pillow if you like

  6. Have an evening meal before your arrival

  7. Ensure you read all the preparation information prior to your test

  8. Confirm your appointment at least 48 hours prior

What happens next?

The study is analysed at our laboratory and reviewed by our qualified team of sleep professionals. Results will be available within 10 working days through your referring doctor or specialist and they will be able to assist with planning any treatment that may be recommended.

Patient information

Click below to download patient information about overnight sleep studies

Thank you


Meet our sleep specialists

Sleep and Respiratory Physician | Sleep Physician

We attract and retain some of the most experienced doctors in the country, who all have a passion for improving patient outcomes and specialise in the treatment of sleep and respiratory disorders.

To give you the best care we can, we have the largest group of privately practicing sleep and respiratory specialists in Australia.

Meet our doctors

St Andrew’s War Memorial Hospital (Sleep)

St Andrew’s War Memorial Hospital, Level 2, 457 Wickham Terrace, Spring Hill, QLD

1800 155 225

St Stephen's Hospital (Cardiology and Sleep)

Level 1, Suite 10, Sara Stella Medical Centre, St Stephen's Private Hospital, 1 Medical Place, Urraween QLD 4655

(07) 4303 4300

Mackay Mater Hospital (Sleep)

76 Willetts Rd, North Mackay QLD 4740, Australia

1800 155 225

Bunbury (Sleep Medicine)

Suite 21, St John of God Hospital, Southwest Health Campus, (Cnr Robertson Drive & Bussell Hwy), Bunbury WA 6230

(08) 9720 3403

Perth Mount (Sleep Medicine)

Suite 3 Mount Medical Centre, Level 3, 140 Mounts Bay Road, Perth WA 6000

(08) 9233 5200

Murdoch (Sleep Medicine)

Suite 5-7, SJOG Medical Centre, 100 Murdoch Drive, Murdoch WA 6150

(08) 9233 5200

Joondalup – Shenton House (Sleep Medicine)

Level 2 & 3, 57 Shenton Avenue, Joondalup WA 6027

(08) 9233 5200

St Andrew's Toowoomba (Sleep Medicine)

St Andrew's Hospital Toowoomba, 280 North Street, Toowoomba, QLD 4350

Buderim Private Hospital (Sleep Medicine)

Buderim Private Hospital, 12 Elsa Wilson Drive, Buderim QLD 4556

1800 155 225

Pindara Private Hospital (Sleep Medicine)

Pindara Private Hospital, Allchurch Avenue, Benowa QLD 4217

John Flynn Private Hospital Tugun (Sleep Medicine)

John Flynn Private Hospital, 42 Inland Drive, Tugun QLD 4224

Bundaberg West (Sleep Medicine)

Mater Misericordiae Hospital, 313 Bourbong Street, Bundaberg West, QLD, 4670

(07) 4199 7080

Bundaberg (Sleep Medicine)

Suite 3, Entrance 1, 72 Barolin Street, Bundaberg, QLD 4670

(07) 4199 7080

Wesley Hospital Auchenflower (Sleep Medicine)

The Wesley Hospital, Auchenflower, QLD, 4066

1800 155 225

RiverCity Private Hospital (Sleep Medicine)

RiverCity Private Hospital, Level 4, 401 Milton Road, Auchenflower, QLD, 4066

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