View clinical trials related to Sleep Apnea, Obstructive.
Filter by:The purpose of this study is to determine if the elevation of the head of the bed in patients with obstructive sleep apnea can decrease the apnea-hypopnea index. First the investigators will do a standard polysomnography and see if the patients are included analysing the criteria like apnea-hypopnea index equal or more than 5. Within 2 weeks the patient will do the second polysomnography but this will be with a elevation of the head of the bed (15 cm of elevation of the bed doing a inclination). Then the investigators will compare the data of apnea-hypopnea index in the standard polysomnography versus the index with the elevation of the head of the bed.
Objective: Obstructive sleep apnoea syndrome (OSAS) is a common form of sleep-disordered breathing (SDB) causing sleep fragmentation, daytime sleepiness, cognitive function impairment, and poor health status in addition to increased risk of cardiovascular complications. OSAS is equally common among the middle-aged male Caucasian and Hong Kong (HK) Chinese populations with a prevalence of at least 4%. However, the prevalence of OSAS in the elderly population in Asia including HK is unknown. Study Design: A sleep questionnaire will be conducted for 1000 subjects aged at least 60 yrs in the elderly community centers focusing on symptoms of OSAS, subjective sleepiness, restless leg syndrome, and sleep-related habits and routines, in addition to past medical history and medications. Home sleep study (EMBLETTA) capable of recording sleep (a single EEG channel), respiratory events, snoring, respiratory efforts and oximetry will be performed on 300 subjects randomly. Those who have negative or technical inadequate EMBLETTA study with a high pre-test probability of moderate to severe OSA will be invited to undergo hospital-based polysomnography for confirmation of their sleep apnoea status. Subjects with AHI>15/hr regardless of symptoms or those with AHI 5-15/hr plus comorbid conditions or excessive daytime sleepiness will be offered continuous positive airway pressure (CPAP) titration followed by CPAP treatment, with serial assessment of subjective sleepiness, quality of life, and cognitive function. Outcome measures: the prevalence rates of SDB (AHI>10, >15 and >30/hr), OSAS, and other sleep disturbances, such as restless leg syndrome (RLS). In addition, we will examine the factors which are predictive of the presence of SDB in this population, and assess the CPAP acceptance, compliance, and treatment outcome of those with OSAS.
Rationale: Almost all the information the investigators have about the effect of continuous positive airway pressure (CPAP) in patients with obstructive sleep apnea (OSA) comes from randomized clinical trials including only middle-aged patients. Little is know, however, about the effect of CPAP in elderly people with OSA. Objective: To assess the effect of CPAP treatment in elderly patients with severe OSA on clinical, quality-of-life and neurocognitive spheres. Methods and Measurements: Open-label, randomized, multicenter clinical trial of parallel groups with blinded end-point design conducted in 12 Spanish teaching hospitals on a consecutive clinical cohort of elderly (≥ 70 years) patients with confirmed severe OSA (IAH≥ 30) receiving CPAP or no therapy while maintaining their usual control for three months. CPAP titration was performed by an auto CPAP device. A good adherence was set as at least 4 hours/day of CPAP use. Primary endpoint was the measurement of quality of life by the Quebec Sleep questionnaire, which includes diurnal and nocturnal symptoms, hypersomnolence, and social and emotional dimensions. Secondary endpoints include different sleep-related symptoms, presence of anxiety or depression, office blood pressure figures and some neurocognitive tests. Patients were invited to a clinical visit on three occasions to quantify the adherence to CPAP. Intention-to-treat analysis was performed.
Validation of the patient perception questionnaire relating to CPAP use
Obstructive sleep apnea(OSA) is an important identifiable cause of hypertension. Previous study has suggested that OSA significantly increases cardiovascular morbidity and mortality, especially in patients with pre-existing cardiovascular disease.The standardized treatment of moderate/severe OSA is continuous positive airway pressure (CPAP). Most of short-term trials indicated that CPAP treatment reduced BP in patients with OSA. But relevant studies have a relative short duration with only but few more than one year. In our opinion, they are not sufficient to detect the real effect of CPAP on reduction in BP. Besides, the impact of OSA on metabolic disorder is still unclear.We hypothesized that long-term CPAP treatment could reduce blood pressure and improve metabolic disorder in patients with coronary heart disease (CHD)and OSA.
Oral appliances are an accepted means to treat obstructive sleep apnea. We propose to develop monitoring sensors that could be inserted into commercially available oral appliances in order to monitor effectiveness of the oral appliances in treating sleep apnea.
Prospective study designed to identify factors that would predict patient adherence to CPAP (Continuous Positive Airway Pressure) therapy.
Comparison of preoperative screening score for OSA. In a preoperative population, comparison of the STOP-BANG, DES-OSA, P-SAP and OSA50 score.
Comparison of different screening score for hypoxemic OSA (Obstructive Sleep Apnea) with the results of a polysomnography (PSG). The different screening score studied are: STOP-BANG, DES-OSA, P-SAP and OSA50.
Clinical trial in patients with obstructive sleep apnoea that are randomised to either continue or withdraw continuous positive airway pressure therapy to identify a disease-specific exhaled breath pattern by mass spectrometry.