emphysematous lung parenchyma, air is permitted to escape on expiration with no corresponding inspiratory flow. Lung distal to the stent, assuming no collateral ventilation, will collapse and become atelectatic. Resultant reduction in lung volume should have the same physiological effect to surgical...
Patients with COPD often have increased lung volume (air trapping), reduced diffusion capacity, and emphysematous changes on high resolution tomographic imaging (often absent on chest radiographs). When these findings are present, patients with persistent dyspnea and reduced FEV1 of less than 60% ...
Respiratory mechanics involves an interplay between the chest wall, lung and diaphragm. Because of simultaneous changes in the mechanical properties of the lungs and chest wall and the interdependence of muscle groups, it is difficult to precisely quantify age-related changes of specific respiratory mus...