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  • Q&A with Australian Health Practitioners

    How is the severity of obstructive sleep apnoea measured?

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  • Dr Nicholas M Phillips

    Ear Nose and Throat (ENT) Surgeon

    Dr Nicholas Phillips is a paediatric and adult ENT surgeon who has advanced training and subspeciality expertise in paediatric and adult nasal obstruction, snoring and … View Profile

    Severity is assessed using the apnoea–hypopnoea index (AHI), which records how many times breathing partially or completely stops per hour of sleep during a sleep study.

    • 5 to 15 breathing interruptions per hour – mild sleep apnoea

    • 15 to 30 breathing interruptions per hour – moderate sleep apnoea

    • More than 30 breathing interruptions per hour – severe sleep apnoea

    These categories guide treatment recommendations, along with your symptoms, airway anatomy and overall health.

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