Sleep & breathing = Schlaf & Atmung
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Autotitrating continuous positive airway pressure (auto-CPAP) devices not only titrate CPAP pressures but also measure residual respiratory events. The aim of the present study was to determine the accuracy of auto-CPAP-derived residual apnea-hypopnea index (AHI). ⋯ Auto-CPAP can identify residual respiratory events equivalent to the use of PSG in a selected population.
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Obstructive sleep apnea (OSA) is influenced by sleep architecture with rapid eye movement (REM) sleep having the most adverse influence, especially in women. There is little data defining the influence of slow-wave sleep (SWS) on OSA. We wished to study the influence of SWS on OSA and identify differences attributable to gender and/or age, if any. ⋯ The upper airway appears to be less susceptible to OSA during SWS than during REM and other NREM sleep. This may be related to phase-specific influences on both dynamic upper airway control as well as loop gain. Gender and age appear to modify this effect.
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Rapid eye movement (REM) sleep behavior disorder (RBD) is a type of REM parasomnia characterized by complex motor activity during REM sleep. In this study, cyclic alternating pattern (CAP) in patients with idiopathic RBD was analyzed to evaluate the expression of arousal instability of NREM sleep. ⋯ To our knowledge this is the first polysomnographic clinical study which evaluated CAP parameters in RBD. Increased CAP rate found may be considered as a sign showing that NREM sleep may also be affected in RBD patients. Therefore, CAP analysis may be important to enlighten the pathogenesis of parasomnias.
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Comparative Study Clinical Trial
Validation of ApneaLink Ox™ for the diagnosis of obstructive sleep apnea.
The aim of the study was to validate the automatic and manual analysis of ApneaLink Ox™ (ALOX) in patients with suspected obstructive sleep apnea (OSA). ⋯ The AHI obtained automatically from the ApneaLink Ox™ using oxygen desaturation ≥3 % as a criterion of hypopnea had a good performance to diagnose OSA. The manual scoring from ApneaLink Ox™ was better than the automatic scoring to discriminate patients with OSA.