View clinical trials related to Chronic Bronchitis.
Filter by:Computer simulations are being developed to predict air flow abnormalities in the airways of patients with lung disease. The purpose of this study is to obtain actual gas flow measurements in the lungs of healthy patients and patients with lung disease and use these measurements to validate the computer models.
The ARIES Flu Assay is a real-time PCR based qualitative assay for the direct detection and differentiation of respiratory viral nucleic acid in nasopharyngeal swabs specimens. The objective of this study is to establish the diagnostic accuracy of ARIES Flu Assay.
SPIROMICS I and SPIROMICS II are observational studies of Chronic Obstructive Pulmonary Disease (COPD). SPIROMICS I had two main aims: (1) To find groups of patients with COPD who share certain characteristics; (2) To find new ways of measuring whether or not COPD is getting worse and so provide new ways of testing whether a new treatment is working. SPIROMICS II has three primary aims. Aim 1 is to define the natural history of "Smokers with symptoms despite preserved spirometry" and characterize the airway mucus abnormalities underlying this condition. Aim 2 is to determine the radiographic precursor lesion(s) for emphysema, and identify the molecular phenotypes underlying airway disease and emphysema. Aim 3 is to advance understanding of the biology of COPD exacerbations through analysis of predisposing baseline phenotypes, exacerbation triggers and host inflammatory response.
Evidence in animals shows that losartan can prevent or reverse inflammation and lung damage due to smoking. The goal of this study is to determine whether this drug which is also used to treat hypertension can stabilize or improve lung function in people who have from chronic obstructive pulmonary disease (COPD).
Chronic obstructive pulmonary disease (COPD) is a long-term lung disease that is often caused by cigarette smoking. The purpose of this study is to evaluate whether certain genetic factors predispose some smokers to develop COPD more than others.