during seven hours of nocturnal sleep, at least 30 apneic events are observed in both rapid eye movement (REM) and non-rapid eye movement (NREM) sleep, some of which must appear repetitively in NREM sleep. The International Classification of Sleep Disorders (second edition) (ICSD-2) includes both clinical and polysomnography (PSG) features for defining OSA with "five or more scorable respiratory events per hour of sleep" as the PSG cut-off for disease (8). The concept of hypopnea [as a reflection of an increased but not complete (i.e., apnea) upper airway obstruction] was first highlighted by Gould (9) and the subsequent demonstration of an increased spectrum of upper airways resistance by Guilleminault (10) has led to a more inclusive term of sleep-disordered breathing that includes apneas, hypopneas, and respiratory effort-related arousals (RERA) from sleep. The ICSD-2 and updated practice parameters of the American Academy of Sleep Medicine both highlight the lack of clinical consensus for hypopnea and RERA definitions, although research definitions have been established. More recently, these definitions have been consistent amongst studies but such consistency is missing from some of the early literature (vide infra).

Sleep Apnea

Sleep Apnea

Have You Been Told Over And Over Again That You Snore A Lot, But You Choose To Ignore It? Have you been experiencing lack of sleep at night and find yourself waking up in the wee hours of the morning to find yourself gasping for air?

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