Chronic Obstructive Pulmonary Disease (COPD)
Start with the big picture
COPD is identified by a post-bronchodilator FEV₁/FVC below 0.70 and commonly involves both emphysema and chronic bronchitis. Cigarette smoking is a major cause; biomass exposure, occupational dusts and chemicals, and α₁-antitrypsin deficiency are also risk factors. Inflammation and structural changes in small airways contribute to progressive airflow limitation, while loss of elastic recoil can promote airway collapse during expiration. Typical features include chronic productive cough, exertional dyspnea, wheeze, and prolonged expiration. Pulmonary function testing helps characterize obstruction and distinguish patterns such as reduced diffusing capacity in emphysema. A complete approach also considers exacerbations, complications, assessment, and management.
What you'll learn
- Identify the spirometric criterion used to define airflow limitation in COPD.
- Recognize major environmental, occupational, and hereditary COPD risk factors.
- Relate emphysema and chronic bronchitis to COPD pathology and airflow limitation.
- Describe common clinical features and selected pulmonary-function patterns.
- Recognize important COPD exacerbation triggers and complications.
Continue your study
Work through the complete notes and reinforce the topic with the study tools available in the full lesson.
