Emphysema (pronounced /ˌɛmfɨˈziːmə/) is a lung disease, characterized by an abnormal, permanent enlargement of air spaces distal to the terminal bronchioles. The disease is coupled with the destruction of walls, but without obvious fibrosis. It is often caused by exposure to toxic chemicals, including long-term exposure to tobacco smoke.
Emphysema is characterized by loss of elasticity (increased pulmonary compliance) of the lung tissue caused by...
more
Emphysema (pronounced /ˌɛmfɨˈziːmə/) is a lung disease, characterized by an abnormal, permanent enlargement of air spaces distal to the terminal bronchioles. The disease is coupled with the destruction of walls, but without obvious fibrosis. It is often caused by exposure to toxic chemicals, including long-term exposure to tobacco smoke.
Emphysema is characterized by loss of elasticity (increased pulmonary compliance) of the lung tissue caused by destruction of structures feeding the alveoli, in some cases owing to the action of alpha 1-antitrypsin deficiency. This causes the small airways to collapse during forced exhalation, as alveolar collapsibility has decreased. As a result, airflow is impeded and air becomes trapped in the lungs, in the same way as other obstructive lung diseases. Symptoms include shortness of breath on exertion, and an expanded chest. However, the constriction of air passages isn't always immediately deadly, and treatment is available.
Signs of emphysema...
less
