منابع مشابه
Anesthesia, sleep, and upper airway collapsibility.
Anesthesia and sleep both predispose to upper airway obstruction through state-induced reductions in pharyngeal dilator muscle activation and lung volume. The tendencies are related in patients with obstructive sleep apnea commonly presenting with difficulties in airway management in the perioperative period. This is a period of great potential vulnerability for such patients because of comprom...
متن کاملAging increases upper airway collapsibility in Fischer 344 rats.
The upper airway muscles play an important role in maintaining upper airway collapsibility, and the incidence of sleep-disordered breathing increases with age. We hypothesize that the increase in airway collapsibility with increasing age can be linked to changes in upper airway muscle mechanics and structure. Eight young (Y: 6 mo) and eight old (O: 30 mo) Fischer 344 rats were anesthetized and ...
متن کاملEvaluation of upper airway collapsibility using real-time MRI.
PURPOSE To develop and demonstrate a real-time MRI method for assessing upper airway collapsibility in sleep apnea. MATERIALS AND METHODS Data were acquired on a clinical 3 Tesla scanner using a radial CAIPIRIHNA sequence with modified golden angle view ordering and reconstructed using parallel imaging and compressed sensing with temporal finite difference sparsity constraint. Segmented airwa...
متن کاملSigns of Upper Airway Collapsibility in Snoring Sounds
We have shown that snoring fundamental frequency (F0) contours have an oscillating pattern in patients with obstructive sleep apnea (OSA) as compared to the relatively smoother pattern in simple snorers. This points to the underlying upper airway instability and collapsibility in OSA. The 2 patterns were classified by 75% accuracy.
متن کاملThe effect of diaphragm contraction on upper airway collapsibility.
Increasing lung volume increases upper airway patency and decreases airway resistance and collapsibility. The role of diaphragm contraction in producing these changes remains unclear. This study was undertaken to determine the effect of selective diaphragm contraction, induced by phrenic nerve stimulation, on upper airway collapsibility and the extent to which any observed change was attributab...
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ژورنال
عنوان ژورنال: Chest
سال: 2001
ISSN: 0012-3692
DOI: 10.1378/chest.120.1.156