Active clinical trials for "Sleep Apnea Syndromes"

Untreated Obstructive Sleep Apnea Syndrome (OSAS) has long-term complications, namely metabolic imbalances (obesity, dislipidemia, type 2 diabetes mellitus). Until now, no molecular markers for this physiopathological connection have been identified. This project aims to determine non-invasive biomarkers that may allow better comprehension of the metabolic consequences of OSAS, as well as assess the effect of Continuous positive airway pressure (CPAP) on these metabolic parameters. This project will integrate the clinical, metabolic, genetic/proteomic and biologic systems to further explore the mechanisms behind OSAS, as well as the effect of the treatment with CPAP.

Obstructive sleep apnea (OSA) is a risk factor for complications during pregnancy and current screening tools for OSA have not been shown to be reliable in pregnant women. The primary aim of this study is to develop a valid screening tool to identify at-risk pregnant women, so that they can be further evaluated and treated. Women with OSA may also be at risk for respiratory complications related to opiate administration for post-cesarean delivery pain. A secondary aim of this study is to evaluate post-operative minute ventilation in women who undergo cesarean delivery using a novel method of non-invasive minute ventilation monitoring.

Objective target of the registry is to investigate the prevalence of SDB as well as the clinical characteristics of patients with and without SDB as well as the predominant type of sdb. For this purpose data from patients suffering from chronic, symptomatic heart failure with impaired left ventricular ejection fraction will be collected prospectively.

The purpose of this study is to investigate the correlation between health outcomes associated with the severity of obstructive sleep apnea (OSA) symptomatology, the findings will guide the design of interventional studies.

The purpose of this study is to identify whether pregnant women with chronic hypertension are at significantly higher risk of having undiagnosed OSA and should be routinely screened with home sleep tests. The investigators will recruit 120 pregnant subjects between 10-20 weeks gestation from the Duke High Risk Obstetrics Clinic over a 20-month period. They will be enrolled into one of two groups: 1) chronic hypertension (on medication or hypertensive blood pressures documented at 3 clinic visits); 2) normal blood pressure, and not on any treatment for chronic HTN and no history of chronic HTN, and matched for BMI (+/- 3 kg/m2) with the chronic HTN group. The two groups will be matched for BMI to control for the effect of obesity on OSA diagnosis and cHTN. The primary hypothesis, that OSA prevalence differs between patients with chronic HTN and normotensive controls, will be assessed with a two-group two-sided Fisher's exact test. A Fisher's exact test with a 0.05 two-sided significance level will have 92% power to detect the difference between a normotensive OSA rate of 0.10 and a chronic hypertensive OSA rate of 0.40 when the sample size in each group is 50. There are no risks associated with the use of the home sleep test device, but subjects that have a severe latex allergy should not participate, as the device

Alzheimer's Disease (AD) is the most prevalent neurodegenerative disease, manifested as an initial deficit of episodic memory that evolves into a global cognitive and psychosocial dysfunction and which prevalence is increasing around the world. Sleep disturbance is frequent since early stages of the disease and sleep fragmentation had been demonstrated increase the production of amyloid peptide (AB) (main pathological hallmark) in non-demented population. Obstructive Sleep Apnea (OSA), which consist in intermittent hypoxia and sleep fragmentation, is a major health problem with multiple systemic effects and it's very prevalent in AD. However, the influence of this comorbidity on the cognitive evolution of AD patients remains unknown. The investigation of neurobiological markers and sleep recording may reveal potential mechanisms of neurodegeneration and explain the influence of sleep fragmentation and/or hypoxia on cognitive decline. To fill those gaps, investigators will perform a multidisciplinary and translational project to assess the progression of symptoms in AD patients, diagnosis of sleep disturbance and new biomarkers of progression of the disease. The present proposal is going to be developed by coordination of different expertises that will be range from the clinical research conducted by a medical neurologist, to the animal model and most molecular work, to be done by an experimented group in mouse work.

Home ventilation techniques consist mainly of two techniques, Continuous Positive Airway Pressure or CPAP and Non Invasive Ventilation or NIV. Whether for CPAP or NIV, pressures are delivered to the patient via an interface. The efficacy of CPAP and NIV is conditioned in part by the observance of the patients to the device. Because the comfort and degree of satisfaction of the patients to its interface is a key factor of the observance, side-effects and satisfaction of patients need to be continuously evaluated with available interfaces for CPAP and NIV treated patients. The purpose of the research is the evaluation of interface side-effects and the degree of satisfaction of home care patients treated for at least three months with CPAP or NIV.

Our multi-disciplinary research group works closely with people who have obstructive sleep apnoea. This is a life-long illness that causes breathing to stop during sleep, which leads to low-oxygen in the blood. Breathing restarts when the airway at the back of the throat reopens, usually during arousal from sleep. In some people the repeated arousals from sleep cause daytime sleepiness. Our research has shown that the low blood oxygen levels affect thinking and feeling, and in some cases we think it damages the brain cells involved with memory, attention, emotions and decision-making. This study will investigate the relationship between the amount of oxygen in the blood and the loss (if any) of brain cells. Also how the ability to perform complex tasks is affected in patients that suffer from sleep apnoea. The results will show whether the brain damage in patients with sleep apnoea can be reversed with treatment. These findings will guide doctors in the treatment for sleep apnoea and they will cast light onto the process of memory decline with the aim to preserve brain function.

The purpose of this study is to discuss the relationship between the result of fentanyl test and required dosage of morphine for children with OSAS after adenotonsillectomy；and to evaluate the ability of predicting requested dosage of morphine postoperatively.

Background: Continuous Positive Airway Pressure (CPAP) remains the reference treatment for moderate to severe forms of the Sleep Apnea/Hypopnea Syndrome (SAHS). Compliance to the treatment appears to be a key factor to improving health status of these patients. Methods: The investigators conducted a multicenter, prospective, randomized, controlled, parallel group trial of standard support completed or not within 3 months of coaching sessions for newly diagnosed SAHS patients starting CPAP therapy. The coaching session consisted of 5 sessions of telephone-based counseling by competent staff. The primary outcome was the proportion of patients using CPAP more than 3 hours per night for 4 months; the secondary outcome was mean hours of CPAP usage in the 2 groups.