View clinical trials related to Sleep Apnea, Obstructive.
Filter by:In Obstructive sleep apnea (OSA), the upper airway closes over and over again during sleep. This leads to disrupted sleep (waking up during the night), daytime sleepiness, and an increased risk for developing high blood pressure. Currently, the best treatment for obstructive sleep apnea is sleeping with a mask that continuously blows air into the nose (i.e. Continuous positive airway pressure [CPAP] treatment). While CPAP treatment stops the upper airway from closing in most people, many people have difficulty sleeping with the mask in place and therefore do not use the CPAP treatment. This research study is being conducted to learn whether using a combination of therapies (i.e. a sedative and oxygen therapy) will improve OSA severity by altering some of the traits that are responsible for the disorder.
The investigators will examine the possible synergistic effects of obstructive sleep apnea (OSA) and type II diabetes mellitus (DM) on vascular functioning by performing a two-part investigation: - A cross-sectional study comparing subjects with OSA+DM, OSA only, DM only, and healthy controls. - A three-month randomized placebo-controlled trial of continuous positive airway pressure (CPAP) in subjects with OSA+DM.
The purpose of this study is to evaluate the feasibility of non-intrusive 24 hours non-invasive measurements with minimized LAVIMO sensor system. The LAVIMO-system is a photoplethysmographic device for reflective mode measurements of the optical damping upper skin layers inside of the ear canal at two different wave lengths. It consists of the in-ear sensor, the electronics and a PC. Vital signs parameter like heart rate, heart rate variability, breathing and arterial blood oxygenation are monitored in patients with sleep apnoea and compared to measurements of standard polysomnography of these patients during one night in the sleep laboratory.
Prospective, multicenter, double-blind, phase II, randomized, dose-response study in 5 parallel groups (dose-range).
Peripheral vascular function is impaired in people with obstructive sleep apnoea who are untreated compared with age-, weight- and sex-matched healthy controls.
Nasal resistance presents considerable variations during night[8]. Additionally, Oral and oro-nasal breathing epochs exhibit strong correlation with the number of apnoea/hypopnoeas [7].The hypothesis that the present study aims to test is whether the pharmacological prevention of increased nasal resistance during night could alter breathing route pattern and lead to a decrease in the number of apnoea/hypopnoeas in OSA patients with normal nasal resistance.
Obstructive sleep apnea has been linked to erectile dysfunction. Furthermore, small studies suggest that treatment of sleep apnea by continuous positive airway pressure (CPAP) may reverse erectile dysfunction in affected patients. The present study aims to investigate in a larger cohort if severe sleep apnea is independently associated with erectile dysfunction and if 6-12 months of CPAP therapy lead to an improvement of erectile dysfunction.
The purpose of this study is to compare the cost-effectiveness and effectiveness of mandibular repositioning appliance (MRA) versus Continuous positive airway pressure (CPAP) therapy in patients with moderate Obstructive Sleep Apnea Syndrome (OSAS).
Obstructive sleep apnea (OSA) is a clinical syndrome characterized by repetitive closure of the airway and frequent awakenings during sleep. Repeated episodes of hypoxia, decrease in intrathoracic pressure, increased venous return and venous stasis, damage to vascular wall may ensue. An increased tendency for coagulation has also been reported in OSA. Venous stasis, vascular endothelial activation and hypercoagulability are also known risk factors for thromboembolism. All of these pathophysiologic changes in OSA may predispose patients for the development of pulmonary embolism (PE) however there is limited data about role of thromboembolic events in OSA.
As continuous positive airway pressure is the treatment of choice for OSA, a mask is vital in ensuring the effectiveness of therapy delivery. The study will evaluate the performance and usability of the new mask vent. This is done by comparing the apnea-hypopnea index (AHI) of patients, who will apply 2 different washing procedures to the new mask, at the end of the study and their baseline data obtained at the beginning of the study.The study will also assess the breathing comfort as well as obtaining subjective data on the usability of the new mask vent system.