What is sleep apnoea?

Sleep apnoea is a condition that means you stop breathing for short periods while you sleep.1 This prevents you from getting the healthy sleep you need to lead a refreshed, energetic life and can cause a number of other health problems.

What is obstructive sleep apnoea?

Watch our video to learn the OSA essentials in just 3 minutes.

What happens when you have sleep apnoea?

Air stops flowing

An apnoea event is when air stops flowing to your lungs for ten seconds or longer, meaning you stop breathing.

Brain signals the body

Your brain sends a signal to you to wake up and take a breath. You take a breath and fall back to sleep.

Cycle repeats

These apnoea events can occur hundreds of times a night and many people with sleep apnoea don’t know it is happening.

What type of sleep apnoea?

There are several different types of sleep apnoea and they have different causes. Fortunately, they can all be treated.

  • Obstructive sleep apnoea (OSA) occurs when the muscles and soft tissues of the throat relax during sleep and block the upper airway. It’s often accompanied by loud snoring or snorting. OSA is the most common type of sleep apnoea.3
  • Central sleep apnoea (CSA) occurs when the brain stops sending signals to the breathing muscles during sleep. The airways remain open, but breathing stops. CSA is rarer than OSA.
  • Mixed sleep apnoea is a combination of central and obstructive sleep apnoea.
  • Cheyne-Stokes Respiration (CSR) is a condition that causes abnormal breathing during sleep (generally shallow breathing followed by deep breathing, with intermittent central apnoeas).4

All of these disorders are characterised by apnoeas and hypopnoeas.

An apnoea is where the muscles and soft tissues in the throat relax and collapse sufficiently to cause a total blockage of the airway that lasts for 10 seconds or more.

A hypopnoea is a partial blockage of the airway that results in an airflow reduction of greater than 50% for 10 seconds or more.5

You might also come across the term ‘sleep-disordered breathing (SDB)’. This term describes a variety of different nocturnal breathing disorders, including OSA, CSA, mixed sleep apnoea and CSR.

What to do about sleep apnoea?

If you think you or a loved one has sleep apnoea, follow these 5 steps:

Talk to your doctor

After taking the sleep assessment, discuss your symptoms and results with your doctor.

Learn more

Take a sleep study at a clinic or at home

Your doctor may recommend that you schedule a sleep test to get a better idea of your snoring habits. It can be done in a sleep test clinic or in the comfort of your home.

Find a sleep lab near you

Discuss treatment options

Your doctor will review your sleep test results. If you are diagnosed with sleep apnoea, they will write a prescription for CPAP therapy and equipment. Read on for treatment options and next steps.

Explore treatment overview

Pick up your CPAP mask and equipment

Find a home medical supply store near you or online and bring your prescription. Your CPAP mask is one of the most important parts of therapy, so research options before your visit.

Explore CPAP masks

Start CPAP

Once you start using your CPAP equipment, don’t forget to register your new ResMed products to receive CPAP therapy tips and more. Our free eBook, How to get started on CPAP therapy, will be very helpful as you begin.

Download now

Who gets sleep apnoea and why?

It is important to remember anyone can have sleep apnoea – men, women and children. It is typically associated with:

  • A narrow throat airway
  • Being overweight/obese6
  • Family history of sleep apnoea7
  • Increasing age8
  • Taking certain sedative medicines9
  • Drinking alcohol10, particularly before going to sleep
  • Smoking11
  • Having certain physical characteristics.6
    These include a narrow airway, a small lower jaw or large tonsils, adenoids or 
    tongue, or nasal congestion caused by a deviated septum or nasal polyps.  
  • Menopause 

CSA and mixed sleep apnoea are often caused by medical conditions that affect the brainstem.

Starting your CPAP therapy at home

Get started CPAP therapy - mobile - ResMed

You’ve recently been diagnosed with sleep apnoea; we’re here to help you get started. Learn more about this therapy, including how to set up your equipment and monitor your results. You can also watch other CPAP users share their experiences.

Keep exploring

Learn more about sleep apnoea treatment and what you can expect after diagnosis.


If you think you’re at risk of sleep apnoea, get tested. And if you’re diagnosed with sleep apnoea, don’t worry: treatment is straightforward and could dramatically improve your quality of life.


Watch patient testimonials and their journey with sleep apnoea therapy.




    1. D.J., Phenotypic approaches to obstructive sleep apnoea – New pathways for targeted therapy. Sleep Med Rev, 2018. 37: p. 45-59.
    2. Campos-Rodriguez, F., et al., Continuous Positive Airway Pressure Improves Quality of Life in Women with Obstructive Sleep Apnea. A Randomized Controlled Trial. Am J Respir Crit Care Med, 2016. 194(10): p. 1286-1294.
    3. Muza, R.T., Central sleep apnoea-a clinical review. J Thorac Dis, 2015. 7(5): p. 930-7.
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  2. Sleep-related breathing disorders in adults: recommendations for syndrome definition and measurement techniques in clinical research. The Report of an American Academy of Sleep Medicine Task Force. Sleep, 1999. 22(5): p. 667-89.
  3. Deacon, N.L., et al., Treatment of Obstructive Sleep Apnea. Prospects for Personalized Combined Modality Therapy. Ann Am Thorac Soc, 2016. 13(1): p. 101-8.
  4. Casale, M., et al., Obstructive sleep apnea syndrome: from phenotype to genetic basis. Curr Genomics, 2009. 10(2): p. 119-26.
  5. Ancoli-Israel, S., Sleep apnea in older adults–is it real and should age be the determining factor in the treatment decision matrix? Sleep Med Rev, 2007. 11(2): p. 83-5.
  6. Webster, L.R., et al., Sleep-disordered breathing and chronic opioid therapy. Pain Med, 2008. 9(4): p. 425-32.
  7. Scanlan et al. Effect of moderate alcohol upon obstructive sleep apnoea. Eur Respir J. 2000; 16.
  8. Wetter, D.W. and T.B. Young, The relation between cigarette smoking and sleep disturbance. Prev Med, 1994. 23(3): p. 328-34.
  9. Wimms, A., et al., Obstructive Sleep Apnea in Women: Specific Issues and Interventions. Biomed Res Int, 2016. 2016: p. 1764837.