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Homesleep: What Our Studies Measure

 

Level-2-Sleep-Study-Set-Up

Home Sleep’s level 2 sleep studies accurately measure your sleep and breathing using the same techniques and technology found in a hospital study to diagnose sleep-related breathing disorders such as obstructive sleep apnoea. 

We measure: 

  • brain waves, 
  • eye movement and 
  • jaw muscle activity 

which allows one of our trained sleep scientists to assess when you are asleep, what stage of sleep you are in, when you are waking and look for any signs of sleep-related bruxism (teeth grinding/clenching). 

We also look at all important respiratory signals to see if there are any breathing issues during your sleep. 

  • Two respiratory bands around your torso measure your chest and stomach movement, 
  • a nasal cannula measures your actual breathing and 
  • a pulse oximeter measures blood oxygen levels. 

The analysing sleep scientist will look at these signals and mark whenever they see a reduction in breathing that causes you to either wake up or your blood oxygen levels to drop by at least 3%, this is known as a respiratory event. We can judge if a respiratory event is caused by an upper airway obstruction, because there will still be respiratory effort in the respiratory bands, or if it is a pause in the respiratory drive, as the respiratory band signals will flatten. We can also determine the type any obstruction is, based on if the airway is only narrowing (hypopnea), or if it completely closes over (apnoea). Severity of sleep apnoea is based on the average amount of respiratory events per hour of sleep and the degree of blood oxygen desaturation as a result of the respiratory events. Many people will have these respiratory events waking themselves up hundreds of times during the night without realising it, because most of the time you’re only waking for 3-10 seconds, not long enough to be aware.

Sleep apnoea often differs in severity throughout the night due to differing circumstances. Because we can see sleep stages, we can determine if any sleep apnoea is worse or even isolated to specific times during your sleep. A position sensor in the recording unit that you wear on your chest tells us if you are sleeping on your back, side or front, showing if sleep apnoea is, as it is for many people, worse when you are lying on your back.

We can also measure leg movements through the night, mainly to look for what’s known as Periodic Limb Movement Disorder (PLMD), which is when the limbs (almost always the legs) periodically twitch during the night, interrupting your sleep in the same way that respiratory events do, but without the risk of blood oxygen desaturations. 

Our sleep study also has a dedicated channel measuring your heartbeat, a useful screening tool for any irregular beats that we can highlight for you and your doctor.

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Sleep Questionnaire

The Epworth Sleepiness Scale helps you determine if you possibly suffer from a sleep disorder and its severity. This scale was developed in 1991 by Dr. Murray Johns right here in Melbourne.

Our sleep questionnaire assesses your sleepiness along with some common risks and symptoms to determine your likelihood of a sleep related issue. Complete the questionnaire now and find out if you require a diagnostic sleep study.

How likely are you to doze off or fall asleep:
Sitting and Reading?*

How likely are you to doze off or fall asleep:
Watching TV?*

How likely are you to doze off or fall asleep:
Sitting, inactive in a public place? (e.g. a theatre or a meeting)*

How likely are you to doze off or fall asleep:
As a passenger in a car for an hour without a break?*

How likely are you to doze off or fall asleep:
Lying down to rest in the afternoon when circumstances permit?*

How likely are you to doze off or fall asleep:
Sitting and talking to someone?*

How likely are you to doze off or fall asleep:
Sitting quietly after a lunch without alcohol?*

How likely are you to doze off or fall asleep:
In a car, while stopped for a few minutes in the traffic?*

Is your waist circumference greater than
102cm (male) or 88cm (female) at the belly button?*

Has your snoring ever bothered other people?*

Has anyone noticed that you stop breathing during your sleep?*

Are you aged 50 or over?*

Analyze your score

Epworth
Sleepiness Scale
0/24

OSA-50 Sleep Apnea
Risk Screening
0/10

Continue

Thank you for taking the time to complete the online sleep assessment.

Studies have shown that the quality of your sleep can significantly affect our health and our quality of life.

So, if you are concerned about your sleep always be sure to speak with your GP.

If you provide your email address the results of this online sleep assessment will be sent to you directly to discuss with your doctor.

*Please note: To be eligible for the Medicare rebate for a sleep study either home based or in-lab the clinical need for a sleep study requires to be determined by approved sleep assessment tools which can only be administered by a medical practitioner. A referral from a medical practitioner will also be needed.

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