Which category of lung disease is characterized by reduced lung compliance and a stiff lung?

Prepare for the Respiratory CAS Exam with comprehensive quizzes. Utilize flashcards and multiple choice questions, each crafted with detailed explanations and hints. Equip yourself for success in your test!

Multiple Choice

Which category of lung disease is characterized by reduced lung compliance and a stiff lung?

Lung compliance is a measure of how easily the lungs and chest wall can expand during inhalation. When the lungs are stiff, they have reduced compliance, meaning you have to apply more pressure to achieve the same inflation. This stiffness is the hallmark of restrictive diseases, where the primary problem is the inability to expand the lungs to full volume. As a result, total lung capacity and other lung volumes are diminished. In restrictive disease, the tissue of the lungs or the chest wall itself becomes less distensible—think fibrosis, interstitial edema, or similar changes that make the lungs “rigid.” That contrasts with obstructive disease, where the main issue is difficulty getting air out due to narrowed airways, and the lungs may be relatively more compliant or even hyperinflated in some conditions. A mixed pattern would show elements of both restriction and obstruction, and normal indicates no alteration in lung mechanics. So a category characterized by reduced lung compliance and a stiff lung is restrictive disease.

Lung compliance is a measure of how easily the lungs and chest wall can expand during inhalation. When the lungs are stiff, they have reduced compliance, meaning you have to apply more pressure to achieve the same inflation. This stiffness is the hallmark of restrictive diseases, where the primary problem is the inability to expand the lungs to full volume. As a result, total lung capacity and other lung volumes are diminished.

In restrictive disease, the tissue of the lungs or the chest wall itself becomes less distensible—think fibrosis, interstitial edema, or similar changes that make the lungs “rigid.” That contrasts with obstructive disease, where the main issue is difficulty getting air out due to narrowed airways, and the lungs may be relatively more compliant or even hyperinflated in some conditions. A mixed pattern would show elements of both restriction and obstruction, and normal indicates no alteration in lung mechanics.

So a category characterized by reduced lung compliance and a stiff lung is restrictive disease.

More practice questions