What is chronic obstructive pulmonary disease (COPD)?

What is chronic obstructive pulmonary disease (COPD)?

• A. A chronic airway inflammation with bronchial hyperresponsiveness causing reversible airflow obstruction.
• B. A genetic disorder causing thick mucus production in the airways.
• C. An acute infection of the airways.
• D. A chronic airflow limitation due to airway inflammation and alveolar destruction.

Answer: (D)

Chronic obstructive pulmonary disease is defined by a persistent, progressive limitation of airflow that is not fully reversible, driven by two main lung changes: chronic inflammation of the airways and destruction of lung tissue (emphysema). This combination narrows airways and reduces elastic recoil, leading to difficulty breathing, chronic cough, and sputum production. Smoking or other long-term exposures are common causes, and spirometry typically shows a reduced FEV1/FVC ratio that does not return to normal with bronchodilators. The description that matches all of this—chronic airflow limitation due to airway inflammation and alveolar destruction—is the best choice. The other options describe conditions that are either reversible or acute, or involve a different disease mechanism.

Chronic obstructive pulmonary disease is defined by a persistent, progressive limitation of airflow that is not fully reversible, driven by two main lung changes: chronic inflammation of the airways and destruction of lung tissue (emphysema). This combination narrows airways and reduces elastic recoil, leading to difficulty breathing, chronic cough, and sputum production. Smoking or other long-term exposures are common causes, and spirometry typically shows a reduced FEV1/FVC ratio that does not return to normal with bronchodilators. The description that matches all of this—chronic airflow limitation due to airway inflammation and alveolar destruction—is the best choice. The other options describe conditions that are either reversible or acute, or involve a different disease mechanism.