View clinical trials related to Sleep Apnea, Obstructive.
Filter by:This purpose of this study is to 1. Determine the change in endothelial dependent vascular reactivity and vascular properties 2. Determine the changes in monocytes activation 3. Determine the change in pro-inflammatory status 4. Investigate the effect of six-month CPAP therapy on the above changes in patients with OSA
Sleep apnea is a common situation that affects up to 80% of acromegalic patients. This disease is linked to disturbance on the carbohydrate metabolism increasing the rates of diabetes. The objective of this trial is to assess (with the euglycemic hyperinsulinemic clamp) the impact of the treatment of sleep apnea, with a continuous positive air pressure device (CPAP), on the insulin resistance.
Moderate to severe sleep apnea (a high number of breathing pauses on a sleep study) is a common health problem that is often associated with loud snoring and sleepiness.The medical term for this problem is obstructive sleep apnea (OSA). People with OSA often have an increased risk for developing heart disease or may already have a diagnosis of heart disease. A clinical research study is being conducted at Brigham and Women's Hospital and Beth Israel Deaconess Medical Center to compare the effects of continuous positive airway pressure (CPAP) to conservative medical therapy with participation in one of four groups: - CPAP Therapy Group: Standard medical treatment for sleep apnea, with CPAP mask worn during sleep. Participants randomized to either Respiratory Therapist (RT)only or RT with Cognitive Behavioral Therapist. - Alternative CPAP Group: Different air delivery level from mask than CPAP Therapy Group. RT meetings. - Conventional Medical Therapy (CMT) Group: Receive one year supply of nasal strips and follow guidelines for how to change sleep habits to minimize apnea.Frequent follow-up support with research coordinator. A sleep doctor or cardiologist will have indicated that a potential participant is an appropriate candidate to receive CPAP or CMT as acceptable approaches to treat his/her sleep apnea. Participants will be recruited between the ages of 45-75 years who have diagnosed heart disease or between 55-75 years for those who have risk factors for developing heart disease. This is a 12 month study* to evaluate alternative ways to address the potential for OSA treatment to reduce heart disease and to identify those features that would strengthen a later, large-scale randomized controlled trial. *For those randomized after December 31, 2012, the study will be 6 months long. We will test the hypothesis that active treatment for OSA with CPAP reduces CVD morbidity and mortality.
Acoustic Pharyngometry (AP) is a method of measurement of Transversal Sectional Areas (TSA) and Volumes of oral cavity and pharynx, based on acoustic waves. The aim of this study is to describe changes on oropharynx dimensions caused by CPAP (Continuous Positive Air Pressure) in patients with severe Obstructive Sleep Apnea Syndrome when compared with patients with Primary Snore, using AP. The exam will be made during the use of CPAP, at various pressures. The investigators also intend to determine if pressure determined by Polysomnography in OSAS patients cause some type of different change in AP graphic.
The purpose of this clinical trial is to demonstrate long-term safety and efficacy of the Inspire system. The Inspire Upper Airway Stimulation (UAS) therapy is intended to treat moderate-to-severe obstructive sleep apnea by improving airway patency through stimulation of the hypoglossal nerve. Study objectives include demonstrating that the Inspire system improves key indices of sleep apnea in a pre-specified percentage of patients.
Obstructive sleep apnea is a problem for a large number of children and can result in problems with thinking patterns, behaviors and sleep if left untreated. Little is known about how positive airway pressure (PAP) therapy might help children who need treatment for obstructive sleep apnea. We will investigate how PAP therapy might be able to improve thinking patterns, behavior and sleep problems in children with obstructive sleep apnea.
The study was designed to test the following hypotheses: In obese patients with OSAS, the benefit of the combination of exercise training + continuous positive airway pressure (CPAP) will be higher than CPAP alone in term of functional capacity, metabolic, inflammatory, cardiovascular and sleep parameters and quality of life. In obese patients with OSAS, the benefit of training using ventilatory assistance (NIV) during cycloergometer [cycloergometer with NIV] or respiratory muscles training (spirotiger) in addition to cycloergometer [cycloergometer + spirotiger] will be higher than cycloergometer training alone [cycloergometer] in term of functional and exercise capacities. Dyspnea during walking test and respiratory muscle strength at baseline could influence the response to combined exercise training such as [cycloergometer + NIV] or [cycloergometer + spirotiger]
Obesity is an increasing problem worldwide. Over 20% of people in western societies are obese (BMI >30kg/m2) and 1-2 % are morbidly obese (BMI >40 kg/m2). According to the recent study 6.6% of Finns are severely obese (BMI > 35kg/m2) and 2.0% are morbidly obese (BMI>40kg/m2). Because conventional treatments often fail to induce sustained weight loss obesity surgery has increased rapidly in many countries. Currently, > 300000 procedures are performed in the US each year. Thus in many European countries, including Finland, the need for obesity surgery is rapidly increasing. The most important risk factor also for obstructive sleep apnea (OSA) is obesity, and thus effective treatment of obesity is the first-line treatment of OSA. However, Reliable information of the prevalence of OSA in morbidly obese patients is still lacking. The current knowledge is based on small studies, which have demonstrated that the prevalence of OSA may be higher than believed, even 70-80% in morbidly obese patients. There is a definite need for large, well-designed, prospective clinical studies to evaluate the effects of weight reduction in OSA and other co-morbidities related to obesity. Ever increasing research data showing a strong link between obesity and OSA and their co-existence as a major risk factor in the development of cardiovascular diseases should provoke concepts to search better clinical guidelines of diagnostics and treatments in a risk group, such as morbidly obese patients.
The primary objective is to evaluate the relative effectiveness of fixed CPAP in comparison to APAP in reducing arterial blood pressure in patients with resistant hypertension and obstructive sleep apnea (OSA). The secondary objectives are: a) to evaluate the relative effectiveness of fixed CPAP versus APAP in improving arterial stiffness, sleep-disordered breathing, sleep quality, inflammatory markers and glucose regulation; b) to identify specific characteristic of persons who respond to the two CPAP modalities in order to identify which device is better for each subject.
The aim of this project is to study the relationship between obstructive sleep apnea (OSA) and metabolic syndrome (MS) in a population of obese patients who are candidates for bariatric surgery. The investigators will study the influence of OSA through hypoxia and sleep fragmentation on different proinflammatory adipokines and cytokines, on metabolic syndrome and on insulin resistance, as well as how these respond to treatment with continuous positive airway pressure (CPAP). In the first part of the study (part A) the investigators will perform an observational study of cases and controls. Based on the diagnostic polysomnography the patients will be divided into two groups depending on their apnea-hypopnea index (AHI): OSA (AHI >= 15/h) and non-OSA (AHI <15/h). The results will be analyzed depending on the presence or not of OSA. In the second part of the study (part B), the patients with severe OSA (AHI ≥ 30/h) will be randomized into two groups: one group will receive CPAP + diet treatment and the other group will only receive diet treatment. After 3 months of treatment (CPAP + diet vs. diet), the investigators will analyze the overall effect on metabolic syndrome and the effect on its individual components, as well as the above-mentioned inflammatory pathways and insulin sensitivity, between the 2 groups. This will be carried out through a randomized controlled study in which the investigators will compare the effect of CPAP with the effect of conservative treatment.