Which condition is a chronic respiratory disease characterized by trapped air in the lungs?

Which condition is a chronic respiratory disease characterized by trapped air in the lungs?

• A. Emphysema
• B. Asthma
• C. Bronchitis
• D. Pneumonia

Answer: (A)

Air trapping in the lungs from loss of elastic recoil is a hallmark of emphysema, a chronic respiratory disease. In emphysema, destruction of alveolar walls reduces the lungs’ ability to snap back during exhalation, so air remains trapped and the lungs become hyperinflated. This prolonged expiration leads to increased residual volume and difficulty breathing, which is why trapped air is a key feature. Asthma involves reversible narrowing of the airways from bronchoconstriction and inflammation, not the permanent alveolar destruction that causes chronic air trapping. Bronchitis centers on inflammation of the airways with mucus production, contributing to coughing and airway irritation rather than long-term air retention from alveolar damage. Pneumonia is an infectious process that fills the alveoli with fluids and debris, impairing gas exchange rather than causing sustained air trapping.

Air trapping in the lungs from loss of elastic recoil is a hallmark of emphysema, a chronic respiratory disease. In emphysema, destruction of alveolar walls reduces the lungs’ ability to snap back during exhalation, so air remains trapped and the lungs become hyperinflated. This prolonged expiration leads to increased residual volume and difficulty breathing, which is why trapped air is a key feature.

Asthma involves reversible narrowing of the airways from bronchoconstriction and inflammation, not the permanent alveolar destruction that causes chronic air trapping. Bronchitis centers on inflammation of the airways with mucus production, contributing to coughing and airway irritation rather than long-term air retention from alveolar damage. Pneumonia is an infectious process that fills the alveoli with fluids and debris, impairing gas exchange rather than causing sustained air trapping.