Active clinical trials for "Sleep Apnea, Obstructive"

Obstructive sleep apnea (OSA) is a respiratory disorder of sleep characterized by recurrent episodes of complete or partial upper airway obstruction, leading to intermittent oxygen deprivation. This results in sympathetic activation and surges in blood pressure, production of vasoactive substances, as well as activation of the inflammatory and procoagulant pathways. Epidemiological evidence indicates the prevalence of OSA is higher in patients with coronary artery disease than in the general population. The investigators recently showed that 65.7% and 41.9% of the Singapore patients admitted with myocardial infarction were found to have previously undiagnosed OSA and severe OSA, respectively. In a 10-year follow-up epidemiological study, OSA was independently associated with a higher prevalence of fatal and non-fatal cardiovascular events among the otherwise healthy general population. The investigators further showed that in patients who have undergone primary percutaneous coronary intervention for acute myocardial infarction, OSA was an independent predictor of future adverse event rates. Despite the observed association between OSA and adverse cardiovascular outcomes, the underlying pathophysiological mechanisms remain unclear. In this proposal, the investigators aim to elucidate the relationship between OSA and composition of coronary atherosclerotic plaques.

The purpose of this study is to validate the Berlin questionnaire and STOP-BANG (snore, tired, obstruction, pressure, body mass index (BMI), age, neck, gender) as effective screening tools for Chinese subjects who are suspected to have obstructive sleep apnea (OSA).

Purpose: In a retrospective cohort the investigators will validate, the goodness of a multidimensional index to classified the severity of patients with sleep disordered breathing that has been previously developed in a prospective longitudinal cohort.

Mandibular advancements during tidal breathing, achieved through a stepped mouthpiece design, affect the size of the upper airways in subjects with and without Obstructive Sleep Apnea.

Sleep-disordered breathing (SDB) in children may be responsible for disruptive daytime behaviors such as inattention and hyperactivity. Many children undergo tonsillectomy for SDB and disruptive daytime behaviors. However, the link between SDB and disruptive behavior is not clearly understood. This study will evaluate the relationship between SDB and disruptive behavior.

The HYPNOS study is an acute feasibility study to validate a new device for automatic detection and treatment of sleep apnea syndrome. The system is known as the PASITHEA system and it will perform the following tasks: Detect apneas and hypopneas in real time, based on physiological signals acquired with a cardiorespiratory holter (nasal air flow, heart rate and blood oxygen saturation (SaO2)) Upon detection of apnea or hypopnea events, trigger kinesthetic stimulation of mechanoreceptors of the skin close to the mastoid bone The primary objective is to verify that the PASITHEA system is able to detect apneas and hypopneas reliably. The main secondary objective of the study is to assess the effect of kinesthetic stimulation on reducing the number of sleep respiratory disorders. Another objective of the study is to verify the safety of the PASITHEA system.

This study aims to validate whether the pattern of airway collapse recorded during Drug-Induced Sleep Endoscopy (DISE) mirrors that of natural sleep, and to develop a model for airway collapse. Sensors will be placed in subjects' upper airways during DISE and then during in-lab sleep studies. The sleep study results will be compared with OR findings to create an aerodynamic model for natural sleep and to assess whether airway observations during DISE were valid representations of natural sleep.

This study evaluated the influence of the sleep bruxism (SB), awake bruxism (AB) and obstructive sleep apnea syndrome (OSAS) on the signs and symptoms of temporomandibular disorders (TMD).

Obstructive sleep apnea syndrome (OSAS) causes hypoxemia and hypercapnia, which may impair cerebral blood flow and cause deficits in behavior. This is a case-control study designed to investigate cerebral blood flow and neurocognitive function in children with OSAS when compared to these findings from normal children. The study hypothesis is that children with OSAS have an impaired cerebral blood flow during wakefulness and sleep compared to normal controls, and that the degree of this impairment correlates with neurocognitive function.

Rehabilitation results in a decrease of the perimeters of the limb with lymphedema by a decrease in the amount of liquid of the affected limb, with movement of the intracellular liquid towards the trunk and the neck then into the jugular-subclavian confluence, the superior vena cava and right atrium without modification of extracellular fluid. No study have evaluated the prevalence of sleep apnea syndrome in this population and the effect of this treatment on sleep apnea syndrome.