View clinical trials related to Sleep Apnea, Obstructive.
Filter by:Obstructive sleep apnea (OSA) is a disease characterized by repeated partial or complete upper airway collapse during sleep, accompanied by arousals or oxygen desaturation. It was reported to affect 5.7 %~9.6 % of pediatric population in western countries and 5.5 %~7.8 % in China. Children's physical developing and brain functioning as well as quality of life (QoL) could be greatly impaired if the disease was left untreated. Polysomnography (PSG) was recognized as gold standard for diagnosing OSA. However, for pediatric OSA, there exists dispute on the PSG diagnostic criteria. Pediatric OSA was mostly caused by hypertrophy of adenoid or palatine tonsillar. For those PSG validated patients, nonsurgical management was often prescribed, in addition, surgical intervention, i.e. adenotonsillectomy was also commonly applied and had been proved efficient both in terms of PSG and in terms of symptoms, behaviors and QoL rated by caregivers. However, for children with controversial diagnoses by ATS and ICSD-3, little was known about whether surgical or nonsurgical management was effective. We aim at investigating the effect of adenotonsillectomy versus nonsurgical management on QoL in these subjects. And the hypothesis is that adenotonsillectomy improves QoL better than nonsurgical management in children with controversial diagnoses of OSA by ATS and ICSD-3.
Obstructive sleep apnea (OSA) is a sleep related breathing disorder, affecting approximately 10% of adults. Mandibular advancement oral appliances (OAM) are an effective treatment for OSA, however, long term use has shown to lead to changes in teeth positioning and jaw alignment (bite changes), which has resulted in some patients stopping treatment. It is becoming common clinical practice for doctors to prescribe the use of repositioning splints to help reduce the bite changes associated with using OAM. However, this has not been studied in a clinical trial. This study will compare the bite changes between patients using OAM alone against patients using a morning repositioning splint in addition to OAM. Other variables, such as oral health, the size of mandibular advancement, and treatment adherence will also be measured to determine if they have an effect on the bite changes associated with OAM use. By understanding the key the factors that influence the bite changes associated with OAM use and potentially validating a technique to reduce these changes, this study will improve the clinical practice of Dental Sleep Medicine, leading to improved health outcomes for OSA patients.
Studies show that sleep apnea increases the risk of cardiovascular disease and is associated with obesity. However, it is unclear how sleep apnea affects fat tissue. Studies have shown that fat tissue is likely involved in developing cardiovascular disease. The purpose of this study is to see how sleep apnea changes fat tissue.
The study design of this research project involves orthodontic patients registered at the Harvard School of Dental Medicine who are deemed eligible to undergo orthodontic treatment and who have been provided with sufficient information to make informed consent to join the sleep study. These patients will be provided with the Medibyte sleep monitor and instructed on the proper manner in which it should be set up and worn for the one night study period. This process will be carried out twice throughout the course of the study, once before any orthodontic appliance has been cemented and once after the required amount of tooth movement has been attained with the orthodontic appliance still in place. The de-identified data from the Medibyte monitor will be downloaded using the Braebon software and analyzed.
In this study, submental ultrasound during awake and simultaneous under Drug-induced sleep endoscopy is applied in the diagnostic workup of obstructive sleep apnea patients. The aim is to assess the tongue base thickness during awake and sleep with different head positions. By correlation with Drug-induced sleep endoscopy findings, more parameters could be used for evaluation and management of upper airway collapse in obstructive sleep apnea patients.
Obstructive sleep apnea (OSA) is a frequent sleep-related breathing disorder with an incidence of 5-20% in the middle-aged population in Europe and Northern America . plumonary hypertension is present in 12%-34% of patients with osa.continous positive air way pressureis the main standard treatment ofOSA.Echocardiograghy is the most common non invasive imaging method for assessment the effect on right ventricular function.
This study evaluates the utility and reliability of Somnocheck micro Weinmann for obstructive sleep apnea syndrome (OSAS) screening in patients affected by resistant systemic arterial hypertension. Results are compared with a modified portable sleep apnea testing (type III portable monitoring: Somnocheck 2 Weinmann).
Obstructive sleep apnea (OSA) is a common nocturnal breathing disorder characterized by complete (apnea) and partial (hypopnea) breathing cessations during sleep. Currently, clinical diagnosis of OSA is based on the clinical symptoms, especially excessive daytime sleepiness, and apnea-hypopnea index (AHI) providing a limited overview of the breathing cessation event frequency during the night. Longer obstruction events and deeper desaturations have been suggested to be more harmful than shorter and shallower events and these individual characteristics are completely neglected by conventional and currently used AHI. The investigators have previously introduced novel diagnostic parameters incorporating the number, duration and morphology of individual obstruction events and shown that they improve the severity estimation of OSA compared to traditional measures. Even though, the novel diagnostic parameters have so far tackled some of shortcomings of AHI, they need to be refined to further increase the accuracy of the OSA severity estimation. It has been shown that age, body mass index (BMI) and sleeping position are strongly related to the severity OSA. However, it is not thoroughly studied whether the severity of individual obstruction events progress over time (the aging process) and which factors affect to this progression. It is known that OSA patients with similar AHI values, durations of individual breathing cessation events can differ significantly. Longer and deeper events are connected to increased mortality rate in patients with moderate or severe OSA and thus, could be considered to be more detrimental than shorter and shallower ones. However, it has not been thoroughly investigated whether in severe OSA patients with identical AHI values, sleep efficiency or hypertension is related to the severity of individual breathing cessation events. The investigators planned to explore, whether the individual breathing cessation event severity progress over time and how different confounding factors affect this progression. Furthermore, the correlation of EDS with the individual breathing cessation event severity, sleep structure, and frequency and occurrence of cortical arousals will be investigated. Also, the investigators will explore whether the percentage time of disturbed breathing from total sleep time is related to sleep efficiency or hypertension in severe OSA patients having similar AHI. Moreover, Positional therapy (PT) i.e., the avoidance of the supine posture during sleep is the treatment of choice for Positional Patients (PP) having most of their breathing abnormalities while sleeping supine. Since it is known that apneas/hypopneas are more severe while sleeping supine, this time the investigators will assess the therapeutic value of PT for severe Non Positional patients (NPP).
Up to now, no studies are available where a comparison has been made between the accuracy of, on the one hand, the gold standard PSG and, on the other hand, a home monitoring sleep apnea-diagnostic system, consisting of a pulse oximeter, and accelerometer, a smartphone for snoring analysis, and a mattress for ballistocardiographic (BCG) recordings. The purpose of this study is twofold. On the one hand, a comparison between the predictive performance of an automated home monitoring system and the gold standard PSG in sleep apnea diagnosis will be performed. The home monitoring system consists of a pulse oximeter, an accelerometer, a smartphone to record ambient sound, and a mattress to record the BCG signal. This system will be provided by KU Leuven and Equilli, two partners that work together with the Sleep Laboratory at UZ Leuven and the group STADIUS of the KU Leuven in the OSA+ project. The system performs automated signal processing and classification in order to determine the presence of sleep apnea events. On the other hand, this study aims to improve the phenotyping of patients suffering from sleep apnea. This task will be first developed using the classical PSG and later an evaluation will be performed on the less obtrusive system.
This is a crossover study comparing the effect of CPAP Fixed Pressure, CPAP FLEX -PLUS and Sensawake on sleep quality, adherence to treatments, and PSG parameters in patients with moderate to severe OSA.