View clinical trials related to Apnea.
Filter by:In patients with underlying heart diseases like hypertensive heart disease, coronary heart disease or dilative cardiomyopathy obstructive sleep-apnea, central sleep-apnea and Cheyne-Stokes-respiration are common finding in polysomnography. In a lot of these patients it is neither a purely obstructive sleep-apnea syndrome nor a complete Cheyne-Stokes-respiration but a combination of both sleep related respiratory disturbances. Previous studies showed an improvement of the central respiratory disorder, for example Cheyne-Stokes-respiration, under continuous positive pressure breathing (CPAP) and an improvement of the left ventricular pump function. (Naughton 1995, Tkacova 1997). However, the recently published CanPAP study could not prove any improvement in the mortality among CPAP therapy patients in comparison to the optimal medical treatment, although under this therapy, the number of breathing disturbances, the oxygen saturation at night and the ejection fraction of the left ventricle showed a significant improvement.(Bradley 2005) Earlier studies proved the adaptive servo ventilation to be an effective therapy for patients with central sleep-apnea and Cheyne-Stokes-respiration respectively. (Teschler 2001) Teschler's study showed that the adaptive servo ventilation therapy with a reduction of central sleep apnea down to 10/hours succeeded. With the SOMNOvent CR a new therapy-algorithm has been developed for the adaptive servo ventilation in patients with obstructive sleep apnea and Cheyne-Stokes-respiration with underlying heart disease. In the first validation study this therapy was very effective and presented only few adverse effects in the patients. (Galetke 2007) The goal of the study was to compare this new therapeutic option (SOMNOvent CR) with the established method of continuous positive airway pressure (CPAP) in patients with combination of obstructive sleep-apnea syndrome and Cheyne-Stokes-respiration with underlying heart disease.
Background: Patients that suffer from respiratory failure and need mechanical ventilation are at risk of further deterioration due to complications induced by progression of lung disease or the mechanical ventilation. The complications usually develop in a progressive manner, but are currently detected relatively late, when there is already severe and life threatening deterioration in patient oxygenation and sometimes irreversible damages. Objective:To measure chest wall dynamics, derived from sensors placed on the chest and abdomen. Methods: The system comprises of patches attached to the chest wall and upper abdomen that include mechanical sensors that measure the mechanics of lung inflation and deflation.
Heart Failure affects 5-6 million Americans and there are about 550 thousand new cases of heart failure every year. There are approximately 3 million hospital admission for acute decompensated heart failure with hospital readmission rate of 20% at 30 days and 50% at 60 day, costing up to 20 billion dollars per year. In our previous study we have discovered that sleep disordered breathing is prevalent in 70% of patients with acute decompensated heart failure. We hypothesize that, detection and treatment of sleep disordered breathing in acute decompensated heart failure patients will reduce episodic hypoxic events during acute decompensation and may decrease hospital length of stay and reduce future readmissions.
Daily physical activity is important to achieve glucose control in persons with type 2 diabetes. The purpose of this study is to explore if obstructive sleep apnea and its daytime symptom, excessive sleepiness, act as barriers to physical activity. We will examine if treatment of obstructive sleep apnea with continuous positive airway pressure results in increased physical activity in persons with type 2 diabetes.
The purpose of this study is to evaluate the effects of CPAP treatment on airway and systemic inflammation in obstructive sleep apnea.
The study will compared the effects of bosentan, an endothelin receptor antagonist, and nasal continuous positive airway pressure (nCPAP), obstructive sleep apnea current reference treatment, on diastolic blood pressure in untreated mildly hypertensive sleep apnea patients. The hypothesis is that blocking endothelin receptors with a drug will have the same systemic blood pressure lowering effect than nCPAP in sleep apnea patients.
A multi-center, prospective, single-visit study designed to acquire physiologic pulse oximeter waveform data during standard polysomnography (PSG) studies performed at multiple different Sleep Lab Centers.
Primary Endpoints: •Comparison of difference in AHI at one-week in-lab polysomnography between "device on" and "device off" nights, controlling for sleep position (supine vs. non-supine) Secondary Endpoints: By polysomnography, reduction in: - AHI with device on vs. off at 3 months, controlling for sleep position - Oxygen desaturation index with device on vs. off - Arousal index with device on vs. off - Duration of snoring with device on vs. off - Epworth Sleepiness Scale Patient acceptance, in terms of: - Refusal rate at screening - Discontinuation rate during follow-up - Daily compliance rate - Device-related adverse events - Serious adverse events
The purpose of this study is to determine whether patients with obstructive sleep apnea have any changes in left ventricular function and structure after 06 months of continuous positive airway pressure treatment.
Hypothesis: The CPAP treatment diminishes the effect of ventricular arrhythmias in patients with ischemic heart disease or dilated myocardiopathy, systolic ventricular disfunction and sleep apnea-hypopnea syndrome (SAHS)Objectives: To analyze the incidence of ventricular arrhythmias (premature ventricular beat, non-sustained ventricular tachycardia and sustained ventricular tachycardia) and appropriate defibrillator therapies in patients with ischemic heart disease or dilated myocardiopathy, moderate-severe left ventricular dysfunction,with an implantable cardioverter-defibrillator (ICD) and sleep apnea. To study the effect of CPAP on the cardiac arrhythmias and on the number of appropriate defibrillator therapies. Design: Parallel, randomized and single-blinded multicentric study to compare CPAP vs. hygienic-dietetic recommendations. Patients with SAHS (AHI≥15) and systolic left ventricle dysfunction patients with an ICD. Duration: 24 months.