Active clinical trials for "Pulmonary Disease, Chronic Obstructive"

This study looks at whether air cleaning devices put in the bedroom and living room of your home could reduce the irritation of your lungs and body that is caused by indoor air pollution. While participating in this study there will be two, 2 month long study segments (Study Period 1 and Study Period 2) where the air filter units, placed in your living room and bedroom windows, will be turned on at your home.

The aims of this study is : to assess the bronchodilator (DUOVENT HFA) response of parameters measured by the forced oscillations (FOT) and in particular the reactance parameters related to the presence of a limitation of expiratory flows to compare the response of the reactance parameters to bronchodilators with the conventional spirometric parameters (FEV1) and inspiratory capacity (IC), and according to the severity of the disease to assess and compare the relationship between the response to bronchodilators in terms of IC on the one hand and on the other hand in terms of FEV1, reactance parameters (measured by FOT), resistance parameters (measured by plethysmography and FOT) Assess and compare the relationship between dyspnea intensity assessed by various scales and conventional respiratory function parameters (spirometry, plethysmography, diffusion indices) and parameters measured by FOT

First, the investigators will image patients with hyperpolarized xenon (Xe) magnetic resonance imaging (MRI) to develop the technique of hyperpolarized xenon MRI at the University of Virginia (UVA). Magnetic Resonance (MR) sequences will need to be developed and optimized for the equipment at UVA. These sequences will need to be evaluated in healthy adults for comparison with results obtained and in adults with lung diseases to optimize the sequences for the detection and evaluation of lung diseases. The MR pulse sequences need to be optimized for the parameters of a human MR coil and the gas exchange characteristics in healthy and diseased lungs. Second, the investigators propose to exploit the power of Xe129 MRI as a diagnostic tool to monitor therapeutic responses of a combination inhaler, Advair, which contains a long-acting beta-adrenoceptor agonist (LABA) and an inhaled corticosteroid (ICS) - two major classes of the current COPD therapeutics. The investigators will characterize the functional changes of the lungs with COPD at baseline, and investigate the responses of the lungs to the treatment after a three-month trial. Also the investigators will compare corresponding results obtained by Xe129 dissolved phase (DP) MRI to the results obtained by gadolinium-based dynamic contrast-enhanced perfusion MRI (perfusion MRI) and high resolution computed tomography (HRCT) of the lung to indirectly validate the Xe129 DP MRI technique. The investigators anticipate that the results from this project will greatly improve the investigators understanding of the lung functional responses of COPD subjects to current therapeutics. Also, the investigators expect that this project will provide evidence to consider Xe129 MRI as a diagnostic strategy to assess and monitor therapeutic responses of existing and new pharmaceuticals, and thus Xe129 MRI will stimulate development of novel therapies for COPD in the future

one-centered, open, non-randomized, controlled clinical trial will focus on a comprehensive study of the clinical, functional and molecular biochemical characteristics of the natural course of COPD in combination with peripheral atherosclerosis

In patients with chronic illness, screening for falls and their health consequences are major public health issues. Muscle weakness, gait and balance disorders are among the most common risk factors for falling. Assessing these parameters would thus be a crucial step in the evaluation of the risk of falling, allowing to more precisely orient the management strategy. Combining inertial unit sensors with clinically validated tests can provide additional information to improve the assessment of fall risks. We therefore propose to constitute a monocentric exploratory study, testing a prognostic screening tool, in patients suffering from a chronic pathology, in order to assess the risk of falling in this population. Considering the relationship between muscle weakness and the risk of falling, we can assume that a deficit in muscle strength will result in less vertical acceleration which could point to a muscle cause of the balance disorder and thus allow a finer detection of the risk of falling. On the other hand, we hypothesize that spinal static disorders in chronic pathologies and in particular osteoarthritis, as well as balance disorders linked to impaired deep sensitivity lead to an increase in oscillations of the trunk when walking which can cause postural balance disorders thus increasing the risk of falling.

More patients with chronic obstructive pulmonary disease (COPD) die from cardiovascular disease than direct pulmonary complications. Inflammation and oxidative stress, characteristic in COPD, are likely contributors to the reduction in nitric oxide (NO) bioavailability and vascular endothelial dysfunction in COPD patients; however, this has yet to be determined. Thus, the overall objective of this proposal is to identify the role of NO bioavailability in contributing to vascular endothelial dysfunction in patients with COPD and to provide insight into the molecular mechanisms involved. Our central hypothesis is that inflammation and oxidative stress, both independently, contribute to the reduction in NO bioavailability and vascular endothelial dysfunction in patients with COPD.

Adaptive support ventilation (ASV) is a closed loop ventilation mode that can act both as pressure support (PSV) and pressure controlled (PCV) ventilation. Weaning with ASV shows promising results mainly in post-cardiac surgery patients. The aim of this randomized controlled study was to test the hypothesis that weaning with ASV could reduce the weaning duration in patients with chronic obstructive pulmonary disease (COPD) when compared with PSV.

The aims of the study are to examine the responsiveness of, and the correlation between field walk tests and physical performance test in patients with chronic obstructive pulmonary disease (COPD) after participating in pulmonary rehabilitation.

The objective is to verify that there is a decrease in the pulsed oxygen saturation with the digital sensor. That is, the drop in oxygen saturation in COPD patients during inhalation is real and not due to an artifact of the measuring tool, because oximeters need a quality pulsatile signal to properly measure oxygen saturation

This study will characterise saliva and sputum FTIR spectral profiles in patients with COPD, during exacerbations and stable disease.