Sleep Study Report – Overview
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Sleep Study Report – Overview
Each ‘Level 2’ sleep study performed by us includes a comprehensive, 6-page sleep study report that is sent to the referring doctor. The sleep study report routinely includes the following:
The benefits of PAP therapy include;
Sleep-related diagnoses, including colour print-out from patient sleep-study data; where appropriate, abnormal brain wave activity, abnormal respiratory events and abnormal leg movements are outlined)
Detailed sleep-statistics, calculated after the polysomnogram has been fully analysed by experienced Sleep Study Scorers
Detailed respiratory statistics, snoring volumes and oxygen saturation profile
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Sleep Study Scoring
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).
Legend for Acronyms Commonly Used in Sleep Study Reports
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
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BMI: Body Mass Index (indicator of healthy body weight based on patient’s height) -
Level 2: highest international standard of polysomnography recording -
REM sleep: rapid eye movement (dream) sleep -
REM-latency: time from sleep-onset to the first period of REM sleep -
Sleep-latency: time from lights off to first period of sleep – this is essentially how long it takes for a patient to get to sleep -
Sleep-related history: symptoms and information, as reported by patient
Respiratory Event Types
Central Apnea
Central sleep apnea or central sleep apnea syndrome is a sleep-related disorder in which the effort to breathe is diminished or absent, typically for 10 to 30 seconds either intermittently or in cycles, and is usually associated with a reduction in blood oxygen saturation.
Obstructive Apnea
Obstructive sleep apnea (OSA) is a sleep disorder where your upper airway repeatedly becomes blocked during sleep, causing pauses in breathing (apneas) or shallow breaths (hypopneas).
Mixed Apnea
Mixed apnea is a sleep-related breathing disorder characterized by a combination of central and obstructive apnea. It begins with a central apnea event, where the brain temporarily stops sending signals to breathe, followed by an obstructive apnea event, where the airway is physically blocked.
Hypopnea
Hypopnea is a sleep-related breathing disorder characterized by shallow or abnormally slow breathing, resulting in a reduction in airflow and a drop in blood oxygen levels. It is often associated with sleep apnea and can lead to disruptions in sleep and daytime sleepiness.
Rera
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
AHI Index
Apnea – Hypopnea Index, indicates severity of sleep-disordered breathing; ≤5 = normal; 05-29 = moderate; ≥30 = severe