Sleep & breathing = Schlaf & Atmung
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Randomized Controlled Trial Multicenter Study
Evaluation of auto bi-level algorithm to treat pressure intolerance in obstructive sleep apnea.
The objective of this study was to evaluate whether a new auto-adjusting bi-level algorithm was comparable to a standard method for prescribing bi-level therapy. ⋯ Our results demonstrated that the auto-adjusting bi-level mode normalized AHI comparable to the standard bi-level mode. The results of this study have several significant implications for the clinical management of sleep apnea. Obstructive sleep apnea (OSA) is a common condition and is associated with untoward complications. Non-compliance with positive airway pressure (PAP) limits the efficacy of the PAP therapy. The auto-adjusting bi-level mode provides a potentially reliable alternative for sleep clinicians faced with prescribing bi-level PAP for non-compliant patients. This study documents that this type of auto-adjusting device provides effective treatment of OSA.
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Randomized Controlled Trial Comparative Study
Pulse wave analysis in a pilot randomised controlled trial of auto-adjusting and continuous positive airway pressure for obstructive sleep apnoea.
Non-invasive measurements of arterial stiffness including the augmentation index (AIx) and central blood pressure (BP) have been used to assess the cardiovascular health of patients with obstructive sleep apnoea (OSA), a well-established independent risk factor of cardiovascular disease. Continuous positive airway pressure (CPAP) can significantly reduce the AIx, but no studies have analysed the effect of auto-adjusting PAP (APAP) or studied morbidly obese patients with severe OSA at higher risk of cardiovascular disease. In this randomised, single-blinded crossover pilot trial, we aimed to compare the efficacy of CPAP with APAP (ResMed S8 Autoset II) in improving peripheral BP, central BP and the AIx, using SphygmoCor technology. ⋯ The large effect size evident when comparing the AIx following CPAP and APAP indicates the need to perform an adequately powered trial in order to determine if APAP improves arterial stiffness to the same extent as CPAP.
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Comparative Study
NREM-AHI greater than REM-AHI versus REM-AHI greater than NREM-AHI in patients with obstructive sleep apnea: clinical and polysomnographic features.
Previous studies show a high prevalence of obstructive sleep apnea (OSA) patients with a higher non-rapid eye movement (NREM) apnea-hypopnea index (AHI) (NREM-AHI) than rapid eye movement (REM) AHI (REM-AHI). However, the clinical significance of this phenomenon in patients with OSA is unknown. This study aimed to investigate whether there were significant differences in clinical and polysomnographic features between the NREM-AHI > REM-AHI group and the REM-AHI > NREM-AHI group and to determine whether NREM-AHI > REM-AHI or REM-AHI > NREM-AHI is a specific clinical entity. ⋯ Our results show that either NREM-AHI > REM-AHI or REM-AHI > NREM-AHI is more common in moderate-to-severe OSA cases, and there are no significant differences in clinical features between the NREM-AHI > REM-AHI group and the REM-AHI > NREM-AHI group. These findings may suggest that either NREM-AHI > REM-AHI or REM-AHI > NREM-AHI should be considered as a part of the spectrum of OSA, rather than a specific clinical entity.
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World Trade Center (WTC)-exposed rescue/recovery workers continue to have high rates of gastroesophageal reflux disease (GERD), chronic rhinosinusitis, and posttraumatic stress disorder (PTSD) symptoms. This study examines the relationship between these WTC-related conditions and being at high risk for obstructive sleep apnea (OSA). ⋯ We found significant associations between being at high risk for OSA and common WTC-related conditions, although the responsible causative mechanisms remain unknown. Since the etiology of OSA is likely multifactorial, improvement may require successful treatment of both OSA and its comorbid conditions.
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The prevalence of restless legs syndrome (RLS) ranging from 6.6% to 83% has been reported in different case series. The pathophysiology of RLS in uremia is still unclear. The aim of this study was to assess the frequency of RLS in the hemodialysis patients and to explore depression and associated detrimental impact on quality of life. ⋯ The frequency of RLS in hemodialysis patients was lower than that reported from similar studies in other countries. The presence of RLS and PNP in hemodialyzed patients negatively affects quality of life, and RLS contributes to occurrence of depression.