Increased granulomatous burden causes difficulty in which of the following?

Increased granulomatous burden causes difficulty in which of the following?

• A. Gas exchange
• B. Diaphragmatic movement
• C. Lung expansion
• D. Airway resistance

Answer: (C)

Granulomatous inflammation in the lungs tends to thicken and stiffen the interstitial tissue, reducing lung compliance. When compliance is lowered, the lungs can’t expand freely during inspiration, making lung expansion the primary difficulty. This is the hallmark of a restrictive pattern: volumes are reduced because the lungs become less able to stretch. Gas exchange can worsen as disease progresses, and airway resistance isn’t the main issue here, since the problem is the mechanical expansion of the lungs rather than blockage of air flow. Diaphragmatic movement plays a role in breathing, but the core limitation is the reduced ability of the lungs to expand due to stiff, granulomatous tissue.

Granulomatous inflammation in the lungs tends to thicken and stiffen the interstitial tissue, reducing lung compliance. When compliance is lowered, the lungs can’t expand freely during inspiration, making lung expansion the primary difficulty. This is the hallmark of a restrictive pattern: volumes are reduced because the lungs become less able to stretch. Gas exchange can worsen as disease progresses, and airway resistance isn’t the main issue here, since the problem is the mechanical expansion of the lungs rather than blockage of air flow. Diaphragmatic movement plays a role in breathing, but the core limitation is the reduced ability of the lungs to expand due to stiff, granulomatous tissue.