Active clinical trials for "Apnea"

Obstructive sleep apnea (OSA) is independently associated with important heart remodeling that further contributes to overt heart failure. Recent evidences using echocardiogram suggested that continuous positive airway pressure (CPAP) has beneficial effects mainly on left ventricle parameters. However, the evidences regarding the right ventricle are scanty. In addition, no previous studies evaluated morphological and functional characteristics in OSA by magnetic resonance imaging (MRI) as well as the impact of CPAP.

This is a research study of the effect of treating laryngomalacia (floppiness of tissue on top of the voice box that can possibly block breathing) found in association with obstructive sleep apnea (blockage of breathing while sleeping). The purpose of this study is to determine which is the best treatment for children with obstructive sleep apnea and laryngomalacia: adenotonsillectomy alone or adenotonsillectomy with laser supraglottoplasty (removal of tissue on top of the voice box to open the airway).

Polycystic ovary syndrome (PCOS) affects 5-10% of women in the United States. Its onset is usually at the time of puberty with manifestations of menstrual irregularity, hirsutism, and obesity. Women with PCOS suffer at an early stage of adulthood from all of the components of the metabolic syndrome, a syndrome that typically has its peak in mid-life in other subject populations. Women with PCOS are more insulin resistant than weight-matched control women and have exceptionally high rates of early-onset impaired glucose tolerance and type 2 diabetes, as well as a substantially elevated risk for hypertension, dyslipidemia, coronary, and other vascular diseases. While recent evidence indicates that the prevalence of sleep-disordered breathing (SDB) is 30-40 fold higher in PCOS than in weight-matched control women, the possible role of SDB in causing the increased metabolic and cardiovascular risks of PCOS has not been evaluated. The overall objective of the proposed study is to analyze the direction of causality between sleep disturbances and markers of the metabolic syndrome in PCOS.

Evaluation of the add-on effect on endothelial dysfunction of treatment of periodontitis in patients with chronic periodontitis and severe obstructive sleep apnea treated by CPAP. Patients with and without chronic periodontitis will be treated by CPAP for 20 weeks. At V2 (10 weeks), endothelial dysfunction will be assessed by the Reactive Hyperemia- Peripheral Artery Tone index. The endothelial dysfunction of the patients will be also assessed at V3 (20 weeks) after periodontitis treatment for the group of patients with chronic periodontitis.

This study is being conducted to determine whether inhaling exhaled carbon dioxide is effective for the treatment of sleep apnea. A mild increase in this gas can stimulate the respiratory drive by 2-3 fold, which in turn can stimulate the upper airway dilator muscles and decrease the severity of obstructive sleep apnea by at least 50% in selected patients.

This is a pilot study to investigate the efficacy and safety of the Negative Pressure Sleep Therapy System for the treatment of obstructive sleep apnea.

The primary objective of this study is to build a well characterized cohort of patients that will be used to determine the genetic variants associated with obstructive sleep apnea (OSA)and its co-morbidities.

A total of 216 patients will be randomized into a partially single blind, randomized, parallel-arm trial to determine whether the ICON™ AT with SensAwake™ and ThermoSmart™ can improve therapy adherence when compared to standard care with a fixed pressure Continuous Positive Airway Pressure (CPAP) device and compared to a less aesthetically pleasing CPAP device without technologies (AutoCPAP, SensAwake™, ThermoSmart™) in patients previously diagnosed with moderate-severe obstructive sleep apnea (OSA).

Obstructive sleep apnea (OSA) is a highly prevalent sleep-disordered breathing disease, caused by recurrent episodes of partial or complete collapse of the upper airway during sleep, resulting in intermittent hypoxia, fragmented sleep, fluctuations in blood pressure, and increased sympathetic nervous system activity. A single-night sleep study (i.e. respiratory polygraphy or polysomnography) is currently considered to be the gold standard for diagnosing OSA. However, recent studies suggest a significant intra-individual night-to-night variability of respiratory events, leading to the hypothesis that one single-night study might not reflect an accurate picture of the disease. Part A: Patients with suspected obstructive sleep apnea, referred to our clinic, undergo the regular diagnostic procedure recommended by the current guidelines. In addition to the in-hospital single-night sleep study, these patients will perform 14 nights of pulse-oximetry at home. By computing and analysing sensitivity and specificity of every additional night, the investigator will answer the questions how many nights of sleep monitoring by home oximetry are necessary to diagnose OSA reliably, and how longitudinal sleep monitoring could reduce the number of false-negative and false- positive results compared to the in-hospital single-night study. Part B: Based on the patients' data of part A, the investigator will develop a questionnaire and present anonymized cases to experts in the field of sleep medicine. Thereby, the investigator will evaluate if the additional information of repeated nocturnal pulse-oximetries changes the experts' decision making regarding diagnosis and treatment of OSA. In a second step, the investigator will perform a classical Delphi study with a panel of experts in sleep medicine to establish consensus on repeated sleep studies and how they should be used for diagnosis and treatment in patients with suspected OSA.

Obstructive sleep apnea (OSA) has been found to be very common in stroke patients. Obstructive sleep apnea has been found to impede stroke rehabilitation and recovery. However, currently, there are few treatment options for OSA in stroke patients. Continuous positive airway pressure (CPAP) is the current therapy commonly used for OSA in the general population, however stroke patients are not highly compliant with this device. Therefore, we have decided to propose a more feasible alternative to treating obstructive sleep apnea through positional therapy. Positional therapy involves using a device to prevent patients from sleeping on their backs, since this position has been found to exacerbate obstructive sleep apnea. Therefore, we hypothesize that stroke patients who use the positional therapy belt will experience improvements in the severity of OSA.