Active clinical trials for "Apnea"

The prevalence of sleep-disordered breathing in Republic of Korea is 27% and 16% in men and women aged 40-69 years. Up to 93% of women and 82% of men with obstructive sleep apnea (OSA) remain undiagnosed. Polysomnography, the gold standard, is time consuming and costly. Patients with undiagnosed OSA may experience obstructive episodes during procedures with conscious sedation. STOP-Bang questionnaire is the validated questionnaire to screen patients for undiagnosed OSA in the preoperative setting. It has high sensitivity (92.9%) for predicting patients with moderate to severe OSA. Previous studies reported that STOP-Bang questionnaire predicted cardiopulmonary events during advanced endoscopic procedures such as endoscopic retrograde cholangiopancreatography (ERCP) and endoscopic ultrasound. However, there have been no studies regarding the risk for sedation-related cardiopulmonary events in patients with undiagnosed OSA undergoing bronchoscopy. Thus, we aimed to evaluate the prevalence of high-risk patients for OSA by a screening questionnaire, and to determine whether the questionnaire could predict patients who are at risk for cardiopulmonary events during bronchoscopy with conscious sedation.

Evaluation of anthropometric, clinical and biological profile in four groups that represents transversely the natural history of Obstructive Sleep Apnea (OSA) and its associated cardiovascular comorbidities: non-OSA, OSA without hypertension, OSA and with hypertension and OSA with a cardiovascular event (CVE).

Upper airway stimulation (UAS) via unilateral implantation of a phasic hypoglossal nerve stimulation device is a safe and effective alternative treatment for patients with moderate to severe obstructive sleep apnea (OSA) who are unwilling or unable to adhere to positive airway pressure (PAP) therapy. Although adherence to UAS is higher than to PAP, there remain patients who are not using UAS consistently. The aim of this project is to explore critical factors in the use of UAS by OSA patients using qualitative research methods (personal interviews). The proposed study will provide crucial information about patients' concerns regarding UAS use and suggestions for how to support new UAS recipients.

Literature shows that patients with obesity and Obstructive Sleep Apnea (OSA), both occurring independently, are more likely to develop cardiovascular diseases and sudden cardiac death (SCD). Assuming that ventricular depolarization is more stable than repolarization then QT interval parameters may be used for heart muscle repolarization assessment for those groups of patients. There were 121 patients included in the study, both - women and men, aging from 35-65 with visceral obesity. Only healthy patients were included - the ones who were not treated for any chronic disease, taking QT elongating drugs, or were not treated with Continuous Positive Airway Pressure (CPAP) therapy at that time.

The objective of this study is to generate expert consensus statements on the differential diagnosis, definition, and management of EDS in patients with OSA who are adequately treated with primary therapy.

Obstructive sleep apnea syndrome (OSA) is a pathology that affects 2 to 15% of the French adult population and more than 30% of subjects over 65 years old. It consists of repeated collapses of the upper airways during sleep leading to interruptions in ventilation (apneas) or significant reductions in ventilation (hypopneas). Balagny et al. have demonstrated the occurrence of hypertension in patients screened positive for sleep apnea syndrome in a French general population cohort. It is also established that sleep apnea increases the risk of cardiovascular disorders, such as metabolic syndrome (combining abdominal obesity and metabolic disorders), hypertension, heart rhythm disorders, especially at night, atherosclerosis (deposits of atheromatous plaques on the artery walls) or type 2 diabetes. These different complications increase the risk of cardiovascular accidents such as cardiac arrest, myocardial infarction, stroke, and expose to a risk of premature death (Inserm). The treatment of choice is night-time positive pressure ventilation, made possible by the use of a breathing apparatus (Continuous Positive Airway Pressure or CPAP). Alternatives to CPAP are the use of a nocturnal Mandibular Advancement Orthosis (MAO) which advances the jaw and allows a pharyngeal opening, and surgery in selected patients. The phenomenon at the origin of apneas is due to a relaxation of the muscles of the pharyngeal wall located at different heights. This obstruction is favored by anatomical particularities specific to each individual. The clinical examination can detect certain anomalies (enlarged tonsils, obstructive soft palate, prominent tongue base, abnormal epiglottis) and propose surgery to remove the obstruction. Nevertheless, it remains difficult to affirm that the detected anomaly is really at the origin of the obstruction and surgical failures are frequent. Endoscopy under induced sleep has been developed for about 10 years in France. This examination, widely used in the world, remains confidential in France. It consists, in the operating room, in inducing a medicated sleep (specific drugs delivered by an anesthetist) and performing a pharyngolaryngeal fibroscopy. The ENT physician can then visualize "live" the site and origin of the obstruction during an apnea. The main objective is to evaluate the interest of endoscopy under sleep before making a surgical indication in a patient presenting a sleep apnea syndrome. The secondary objective is to evaluate the reliability of sleep endoscopy.

The objective of the study is to define an optimal threshold of the SEMSA-15 scale for obstructive sleep apnea (OSA) perception in patients with OSA to predict 3-month and 1-year continuous positive airway pressure adherence.

Studies have shown high prevalence (60-94%) of obstructive sleep apnoea (OSA) among patients undergoing bariatric surgery. Fifteen studies are published investigating the effect of bariatric surgery on OSA. All of them conclude a highly positive effect on OSA by bariatric surgery and weight loss. However these studies are biased by a huge number of drop outs. The drop out rate in the studies are around 60 percent. The Investigators state that the prevalence of OSA among patients undergoing bariatric surgery in Denmark is high. The Investigators state that the effect of bariatric surgery is significant on severity of OSA. The Investigators state that we can perform a study without a huge number of dropouts.

The purpose of this study is to determine whether obstructive sleep apnea affects sleep dependent memory and learning. Subjects with apnea will be given a test of perceptual skill learning (the Visual Discrimination Task (VDT)) that has previously been shown to depend on sleep. Subjects will be tested on this task before and after sleep. The difference in performance after sleep compared to before sleep provides a measure of sleep dependent learning. Participants will be tested on one night when they have less apnea because they are using continuous positive airway pressure (CPAP) as prescribed by their physician, which is well known to reduce apnea; and on another night when they are in their native state and have a greater degree of apnea. Memory performance will be compared between the two nights to determine how apnea affects sleep dependent memory.

Clinical diagnostic of brain death requires a non-reactive coma, absence of brain stem reflex, and absence of spontaneous breathing. The confirmation of absence of spontaneous breathing is established the apnea test (according to the American Academy of Neurology's Guidelines). However this test may lead to complications (acute hypoxemia, ventilatory and cardiocirculatory disorders) and reduces significantly the number of lung transplants. Some data suggest modifying the apnea test : replace the ventilator switching off with continuous positive airway pressure (CPAP) use. These studies showed that this alternative method (CPAP) increased the level of lung harvest but they were not sufficient because these studies were monocentric with little patients,. That why the aim of the present study is to compare the standard strategy and CPAP strategy with a prospective, multicenter,cluster trial; each center will use the method of apnea test which it uses usually.