Increased lung compliance due to loss of elastic recoil is most characteristic of which condition?

Increased lung compliance due to loss of elastic recoil is most characteristic of which condition?

• A. Pulmonary emphysema
• B. Chronic bronchitis
• C. Restrictive pulmonary disease
• D. Pulmonary emphysema and chronic bronchitis

Answer: (A)

When elastic recoil in the lungs is reduced, the lung tissue becomes stretchier and expands more for a given pressure change. This reflects increased lung compliance. Emphysema causes destruction of elastic fibers in the alveolar walls, reducing recoil and making the lungs more compliant. This leads to easy inflation but also air trapping and hyperinflation. Chronic bronchitis mainly involves airway inflammation and mucus production with obstructed airways; it doesn’t inherently increase the elasticity of the lung parenchyma, so its impact on compliance isn’t the hallmark feature. Restrictive diseases stiffen the lungs, lowering rather than raising compliance, and they reduce lung volumes. So, the scenario of increased compliance due to loss of elastic recoil best describes emphysema.

When elastic recoil in the lungs is reduced, the lung tissue becomes stretchier and expands more for a given pressure change. This reflects increased lung compliance. Emphysema causes destruction of elastic fibers in the alveolar walls, reducing recoil and making the lungs more compliant. This leads to easy inflation but also air trapping and hyperinflation.

Chronic bronchitis mainly involves airway inflammation and mucus production with obstructed airways; it doesn’t inherently increase the elasticity of the lung parenchyma, so its impact on compliance isn’t the hallmark feature. Restrictive diseases stiffen the lungs, lowering rather than raising compliance, and they reduce lung volumes.

So, the scenario of increased compliance due to loss of elastic recoil best describes emphysema.