View clinical trials related to Sleep Apnea, Obstructive.
Filter by:The obstructive sleep apnea (OSA) affects between 10% to 25% of the adults. Continuous positive airway pressure (CPAP) is the first choice of treatment in severe OSA. However, the adherence to CPAP varies, and the interface between patient and the CPAP may interfere with adherence, comfort and efficiency as well as in sleep variables. Objectives: (1) to determine if self-reported airflow route (nasal or oronasal airflow) is the same as the route determined in a laboratory analysis in controls (healthy subjects) and severe OSA patients with nasal free airflow of obstruction during asleep and awake, (2) to compare the effects of nasal and oronasal CPAP titration (randomized order of masks, 14 days apart) on apnoea-hypopnoea index, CPAP level, PSG variables - including analysis for body positioning, the airway defense mechanisms (nasal mucociliary clearance, mucus properties, citology and inflammation in nasal lavage fluid) and systemic effects (serum miRNA expression and cytokines), (3) CPAP adherence after 1 month and 12 months.
This study intends to determine whether continuous positive airway pressure (CPAP) can reduce arterial stiffness (measured by pulse wave velocity) in nonsleepy as well as in sleepy patients with obstructive sleep apnea .
There is some evidence suggesting that OSA is associated with low level of systemic inflammation and oxidative stress. Low level systemic inflammation and subsequent vascular damage has been implicated as the underlying mechanism responsible for comorbidities. Detection of altered inflammatory markers in OSAS patients may predict the degree of nocturnal sleep disturbance and associated systemic inflammation and presence of comorbidities. Recently, novel inflammatory biomarkers, such as neutrophil to lymphocyte ratio (NLR) have been proposed as an indicator of systemic inflammation. To our knowledge, NLR has not been studied in OSAS. We conducted the present study to evaluate the association between OSAS and inflammatory markers CRP, ESR and NLR.
MORPHEOS is a multicenter, randomized, unblinded study, for patients diagnosed with uncontrolled hypertension and at least one antihypertensive medication. Those patients with significant sleep apnea wil be randomized to CPAP or nasal strips for 6 months.
There is accumulating evidence for obstructive sleep apnea (OSA) as an independent risk factor for paroxysmal atrial fibrillation and for high recurrence rates of atrial fibrillation after ablation therapy. We have previously shown that simulated OSA triggers premature atrial beats (PABs) by acute changes in intra-thoracic pressure. Most episodes of atrial fibrillation are initiated by PABs. However, the origin of PABs induced by intra-thoracic pressure swings is unknown. This study investigates the origin of premature atrial beats induced by intra-thoracic pressure changes that simulate obstructive sleep apnea in patients with atrial fibrillation.
The main objective of the study is to identify the determinant of sleep characteristics of obese patients attempting a tertiary clinical center for obesity management, including bariatric surgery. More accurately the questions addressed are: - What are the determinants of the sleep habits (sleep duration, chronotype) and of their evolution - What are the determinants of sleep breathing disorders (sleep apnea, obesity hypoventilation syndrome) and of their evolution
The investigators hypothesis is that obstructive sleep apnea (OSA) patients with a low arousal threshold may wake up too early during a respiratory event, before upper airway muscles can be activated to achieve stable ventilation. Thus, strategies to manipulate the respiratory arousal threshold could potentially improve the quality of sleep and sleep disordered breathing. Agents that raise arousal threshold are therefore likely to benefit some patients with OSA. The overall goal of this project is to determine the importance of the arousal threshold in OSA, determine which patients might benefit from a raised arousal threshold, and test this hypothesis by using pharmacological manipulation of the arousal threshold to achieve this goal.
The purpose of this study is to evaluate the benefits and risks of hypoglossal nerve stimulation with the ImThera Medical aura6000 System as a potential therapeutic option for individuals with moderate to severe OSA that have failed or do not tolerate PAP.
The purpose of this study is to determine whether patient-specific computer-aided design (CAD) and three-dimensional (3D) printing can be utilized to produce personalized, effective continuous positive airway pressure (CPAP) masks for children with severe obstructive sleep apnea (OSA) and craniofacial anomalies who encounter significant difficulty using CPAP because of poorly fitting masks despite exhausting available commercial mask options.
The purpose of this research study is to determine if muscle training will improve snoring and obstructive sleep apnea. Subjects will receive a sleep study to determine the severity of their apnea. After this study, subjects will be randomly assigned to one of two groups. The first group will receiving a breathing trainer that may strengthen the muscles used to breath in and out. The second group will be receive a sham trainer which looks like the "real" trainer but is not able to produce a strengthening effect. Both groups will complete eight weeks of home based (real or sham) training. The sleep study will be repeated and we well measure any changes in measures of severity for obstructive sleep apnea.