Frequently Asked Questions

What is Obstructive sleep apnoea (OSA)

OSA is extremely common. In the United States, 25% of men and 10% of women are affected; estimates are similar in Australia. About 5% of the adult population has OSA of a severity that poses a significant threat to health.

The condition is characterised by snoring and repetitive blockage of the upper airway during sleep, resulting in sleep disruption, low oxygen levels and activation of the body’s stress responses.

Dr Adrian Chazan


Dr Chazan is a Respiratory & Sleep Physician, and General Physician. Born in Melbourne, he undertook his basic medical training at the University of Melbourne. With a passion for sleep and breathing, he trained at world-renowned centres of excellence in Melbourne and Sydney, including Westmead Hospital, the Alfred Hospital and Monash Medical Centre. Adrian has been involved in research activities in the fields of sleep apnoea, chronic obstructive pulmonary disease and exercise physiology.

Adrian utilises the latest findings in sleep research as well as the emerging technologies in diagnosis and treatment. He takes a patient-centered approach to medical care with the aim of empowering his patients to achieve better sleep and optimal long-term health outcomes.