Sleep Study FAQs

What Is Normal Sleep?

Sleep is a behavioural state characterised by little physical activity and almost no awareness of the outside world. Sleep is an active, highly organised sequence of events and physiological conditions and is made up of two distinct states: Non Rapid Eye Movement Sleep (NREM) and Rapid Eye Movement Sleep (REM).


What Is Normal Sleep? Information Sheet

Obstructive Sleep Apnoea

‘Apnoea’ is a word used to describe complete absence of breathing for more than 10 seconds, which usually occurs during sleep.

The most dangerous type of Apnoea is Obstructive Sleep Apnoea (OSA), which is characterised by repetitive pauses in breathing during sleep due to collapse of the upper airway. This is usually accompanied by a reduction in oxygen levels in the blood, and followed by an awakening to breathe.


Obstructive Sleep Apnoea Information Sheet

Treatment for Obstructive Sleep Apnoea

Obstructive Sleep Apnoea (OSA) is a serious, potentially life-threatening condition experienced by about 24% of men, and 9% of women. The specific therapy for sleep apnoea is tailored to the individual patient based on medical history, physical examination, and the results of the sleep study.

Treatment for Obstructive Sleep Apnoea Information Sheet

Circadian Rhythms

A Circadian Rhythm is roughly a 24-hour cycle in the physiological processes of living beings, including plants, animals, fungi and cyanobacteria. All living beings have a daily cycle of activity and inactivity, which in humans is known as wakefulness and sleep.

Circadian Rhythms Information Sheet

What is Snoring?

Snoring is noisy breathing through the mouth and nose during sleep. People snore when they are breathing in or out. It is caused by partial upper airway obstruction, and occurs during sleep when the muscles of the upper airway relax.

It’s believed that up to 30% of the population are habitual snorers.

What is Snoring? Information Sheet

Fatigue and Sleepiness

Fatigue is caused by lack of sleep or poor quality sleep. Sleepiness is caused by increased or excessive sleepiness during the day, which manifests as a lack of concentration/inattention or a tendency to doze at inappropriate times when intending to stay awake.

Fatigue and Sleepiness Information Sheet



Insomnia can include difficulty falling asleep, waking up frequently during the night with difficulty returning to sleep, waking up too early in the morning, and un-refreshing sleep.

Over 30% of the population occasionally experience insomnia and about 5% of sufferers require treatment.


Insomnia Information Sheet

Sleep Apnoea and Impotence

There is evidence that a reduction in oxygen levels, such as those seen during Obstructive Sleep Apnoea, may lead to decreased testosterone levels, which is the primary sex hormone that supports normal erections.

During REM sleep, men experience nightly erections that help maintain healthy organ function. In men with OSA, REM sleep is broken by periods of frequent waking and nightly erections may not occur.

Sleep Apnoea and Impotence Information Sheet

Fatigue and Driver Performance

Fatigue is a major cause of road accidents in Australia, and sleepiness and sleep disorders are key contributing factors to fatigue in drivers of heavy vehicles.

Fatigue is considered to be the main cause of driver recognition failure, which includes inattention, internal preoccupation or distraction, drowsiness and falling asleep.


Fatigue and Driver Performance Information Sheet

Do you think you Snore or have a Sleep Disorder?

If you have symptoms of a sleep disorder, it’s important that you arrange for a sleep study to ensure proper diagnosis and treatment. Simply ask your General Practitioner, Specialist or Dentist for an out-of-hospital sleep study and we’ll take care of the rest.

What To Do If You Snore Or Think You have A Sleep Disorder Information Sheet