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Among the most common sleep disorders are those related to disruptions in airflow (apnea) or reductions in the breath amplitude (hypopnea) with or without obstruction of the upper airway (UA). One of the most important sleep disorders is obstructive sleep apnea (OSA). This sleep-disordered breathing, quantified by the apnea-hypopnea index (AHI), can produce a significant reduction of oxygen saturation and an abnormal elevation of carbon dioxide levels in the blood. Apnea and hypopnea episodes are associated with arousals and sleep fragmentation during the night and compensatory response of the autonomic nervous system.
CitationJane, R. Engineering sleep disorders : from classical CPAP devices toward new intelligent adaptive ventilatory therapy. "IEEE Pulse", 01 Setembre 2014, vol. 5, núm. 5, p. 29-32.
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