Each 'Level 2' sleep study performed by us includes a comprehensive, 3-page sleep study report that is sent to the referring doctor. The sleep study report routinely includes the following:
All our sleep studies are individually analysed by experienced Sleep Study Scorers. Our senior staff are registered sleep technologists with the BRPT (Board of Registered Polysomnographic Technologists), an internationally recognised qualification in sleep technology. Studies are analysed according to international standards outlined by the AASM (American Academy of Sleep Medicine), ASA (Australian Sleep Association) and ASTA (Australian Sleep Technologists Association).
Arousal: abrupt shift of EEG frequency during sleep, including alpha, beta, theta and/or higher frequencies for >3 seconds and preceded by at least 10 seconds of sleep. Arousals can occur during NREM and REM sleep
≥90% reduction in peak thermal excursion from baseline, lasting at least 10 seconds; central apnoeas are associated with absence of inspiratory effort throughout the entire period of absent airflow
≥90% reduction in peak thermal excursion from baseline, lasting at least 10 seconds; obstructive apnoeas are associated with continued or increased effort throughout the entire period of absent airflow
≥90% reduction in peak thermal excursion from baseline, lasting at least 10 seconds; mixed apnoeas are associated with absence of inspiratory effort at the start of the event, followed by return of inspiratory effort during the second portion of the event
≥30% reduction in nasal pressure signal from baseline, lasting at least 10 seconds; hypopnoeas are associated with an oxygen desaturation of at least 3% and/or an EEG arousal
sequence of breaths lasting 10 seconds or more, with increasing respiratory effort or flattening of the nasal pressure signal leading to an EEG arousal during sleep (scored when criteria for hypopnoea is not met
Apnoea Hypopnoea Index, indicates severity of sleep-disordered breathing; ≤5 = normal; 6-14 = mild; 15-29 = moderate; ≥30 = severe
