Welcome to Sleep Dynamics

At Sleep Dynamics, we offer a comprehensive service for Home Sleep Apnea testing and device management. Sleep Dynamics is a distributor or Australian made ResMed products, Fisher and Paykel as well as Philips Respironic devices.

At Sleep Dynamics, we have 20 years in device management and clinical practice in cardiology and respiratory fields. We want to provide you with the building blocks for a great night sleep not only for you but for everyone in the family.

Michael Johnson is the founder of Sleep Dynamics. He trained as an intensive care paramedic and has worked extensively in both respiratory and cardiac fields.

Let us explore the best dynamic sleep solutions for your needs with our innovative home visits.

What is Sleep Apnea?

Snoring and sleep apnea are common sleep-disordered breathing (SDB) problems that can affect your sleep, daytime health and quality of life.
We only treat between 10 and 20% of the sleep apnea patient group. This means that approximately 20 to 30% of our population has SDB.

Snoring and sleep apnea often occur together.

Your airway may:

  • Narrow
  • You may snore. This is the vibrating of your airway
  • Totally obstructed causing you to have apneic moments.

This third type of change is called obstructive sleep apnea (OSA). It is the most common type of SDB and each incident may last for 10 seconds or longer.

What happens to your airway during sleep apnea?

A patent airway is pictured below. It does not have an obstruction and air passes through the airway without any resistance


When our airway obstructs is reduces the amount of air passing through our airway and can cause our airway to vibrate as the air rushed to pass through the reduced space. It can even be fully occluded, this is caused by lack of muscle tone and gravity as we lay supine (on our backs)


An obstructed airway means we are not getting enough air. We then begin to suffocate as we can’t get enough air into our system and we awake out of our sleep. When we awake we get enough support of our airway to then fall asleep and the circle of airway obstruction happens again. This can happen numerous times during the night causing us to have sleepless nights and daytime fatigue. It also causes us to have an increased pulse rate and blood pressure which again affects our daytime patterns and finally our cardiovascular system.


Even with a partially obstructed airway we can have the following problems:

  • Each time an obstruction occurs, our body decreases the amount of oxygen it inhales and retains and reduces the amount of carbon dioxide it exhales.
  • During these moments our body wakes us up in an attempt to tell us we need more oxygen. We then awake enough to remove the obstruction and fall asleep again and the cycle of airway obstruction occurs again.
  • During airway obstruction our body does not get to totally relax. Meaning that our pulse rate, blood pressure remain elevated and even our  body's automatic response system, resulting in increasingly more severe apneas and hypopneas
  • Daytime fatigue is elevated because of our  sleep deprivation.

Signs and Symptoms from lack of sleep may include:

  • Excessive daytime sleepiness
  • Poor concentration
  • Poor memory
  • Depression


A Dynamic Health Australia company
ABN 160325600