COPD Diagnosis and Management

Introduction to COPD

The American Thoracic Society recommends that COPD should be suspected in any patient over 40 years old with dyspnea, chronic cough, or sputum production who has significant smoking history (>10 pack-years) or occupational/environmental exposures, and diagnosis must be confirmed with post-bronchodilator spirometry showing FEV1/FVC <0.70 1, 2, 3

Chronic and progressive dyspnea is the most characteristic symptom of COPD, representing the major cause of disability and anxiety in these patients, according to the American Journal of Respiratory and Critical Care Medicine 1, 3, 4
Chronic cough is often the first symptom and is frequently dismissed by patients as a consequence of smoking or environmental exposures, as noted by the American Journal of Respiratory and Critical Care Medicine 1, 3, 4
Sputum production meeting the classic definition of chronic bronchitis is common, though this arbitrary definition doesn't capture the full range of sputum production in COPD, as reported by the American Journal of Respiratory and Critical Care Medicine 1, 3, 5

The Global Initiative for Chronic Obstructive Lung Disease (GOLD) classifies COPD into four stages: mild, moderate, severe, and very severe, with mild COPD characterized by few or no symptoms, and severe COPD characterized by breathlessness on any exertion or at rest, as described by Thorax 6

Spirometry is required to establish the diagnosis—a post-bronchodilator FEV1/FVC <0.70 confirms persistent airflow limitation, as stated by the American Journal of Respiratory and Critical Care Medicine 1, 2, 3, 5

A detailed history should systematically assess smoking history, occupational or environmental exposures, age of symptom onset, pattern of symptom development, history of childhood respiratory infections, past medical history, history of exacerbations, and comorbidities, as recommended by the American Journal of Respiratory and Critical Care Medicine 1, 3, 8

Asthma may be a risk for developing chronic airflow limitation and COPD, as noted by the American Journal of Respiratory and Critical Care Medicine 1, 2, 3
Airway hyperresponsiveness is an independent predictor of COPD and respiratory mortality, according to the American Journal of Respiratory and Critical Care Medicine 1, 3
HIV infection accelerates onset of smoking-related emphysema and COPD, as reported by the American Journal of Respiratory and Critical Care Medicine 1, 3, 8