View clinical trials related to Tracheobronchomalacia.
Filter by:This study aims to determine if an expiratory resistance device that delivers non-invasive positive expiratory pressure (nPEP) will reduce or stop coughing, reduce airway resistance and improve quality of life in patients with tracheobronchomalacia (TBM) who are not candidates for tracheal stenting.
The aim of this study is to assess the benefit of a portable ventilator generating positive end-expiratory pressure on exercise tolerance in patients with Excessive dynamic airway collapse (EDAC) and tracheobronchomalacia (TBM).
Background. Do pressure dependent tracheal obstructions (PDTO) often seen during bronchoscopy in COPD patients affect pulmonary function tests and breathing symptoms? Method. Model study. A garden hose was compressed from one side to simulate the posterior wall of the trachea bulging into the lumen. For two obstruction lengths - 3 cm and 12 cm, the hose was increasingly compressed in eight steps. Resistance was measured at each step for airflows 1 l/s through 9 l/s, and digital photos of the luminal area were taken which were used by a computer to estimate the cross sectional area reduction and the corresponding distance between the bulging (posterior)and the opposite (anterior) wall (AP-distance). Patient study. 104 stable COPD patients studied by pulmonary function tests and bronchoscopy. The tracheal obstruction was observed during forced expiration and cough, and the cross sectional area reduction was estimated using the results from the model study.
It is not clearly understood what causes tracheobronchomalacia (weakening of the windpipe and airways) or tracheal stenosis (narrowing of the windpipe). We plan to take biopsies (small pieces of tissue) and brushings (to collect the cells that form the lining of the airway) from the airways of patients with these diseases and analyze these samples in a laboratory to try and determine the mechanism of disease. We will compare the results with that of patients with normal airways.
The purpose of this study is to evaluate respiratory symptoms and their impact in the quality of life and after treatment of the respiratory condition (tracheobronchomalacia - TBM).
The main purpose of this study is use a new type of measurement to help decide what kind of therapy would help people with a collapsing windpipe or tracheomalacia.