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13 mar 2021 · Obstructive sleep apnea syndrome (OSAS) is a sleep-related breathing disorder characterized by partial reductions (hypopnea) and complete pauses (apnea) in ventilation. These respiratory disturbances cause intermittent hypoxemia, intrathoracic pressure changes, and fragmented sleep, which not only impair quality of life, but also lead to ...
The oropharynx is the most common site of airway collapse in obstructive sleep apnea (OSA), and enlarged parapharyngeal fat pad, thicker lateral pharyngeal walls, and increased tongue volume play key roles.
5 paź 2016 · Obstructive sleep apnea (OSA) is a disorder that is characterized by obstructive apneas, hypopneas, and/or respiratory effort-related arousals caused by repetitive collapse of the upper airway during sleep. The epidemiology, clinical presentation, diagnostic approach, and complications of OSA are reviewed here.
21 mar 2024 · Obstructive sleep apnea (OSA) is characterized by episodes of a complete airway collapse or a partial collapse with an associated decrease in oxygen saturation or arousal from sleep. Other symptoms include loud, disruptive snoring, witnessed apneas during sleep, and excessive daytime sleepiness.
STRUCTURAL AND PHYSIOLOGICAL DETERMINANTS OF OSA. OSA is characterised by recurrent episodes of UA collapse during sleep [8,10,11]. It can oc-cur at multiple levels at the site of the nose, nasopharynx, oropharynx, epiglottis, or hypophar-ynx in a diferent proportion in individual patients [12-15].
3 lis 2020 · We included adults and children (below 18 years old) with a diagnosis of obstructive sleep apnoea, defined as five or more episodes of apnoea or hypopnoea per hour of sleep by polysomnography (PSG) or portable monitoring (Type I to Type III sleep monitors).
While a narrow, collapsible oropharynx plays a central role in the pathophysiology of OSAS, there are other equally important nonanatomic factors including sleep-stage dependent muscle tone, arousal threshold, and loop gain that drive obstructive apneas and hypopneas.
