What is true about pneumothorax ?
Correct answer: D. Total chest wall diameter is increased
- A. Increased lung compliance
- B. Interpleural pressure becomes more negative
- C. The concentration of surfactant is reduced in alveoli
- D. Total chest wall diameter is increased
Explanation
In pneumothorax, pleural pressure approaches atmospheric pressure, so the lung recoils inward while the chest wall recoils outward, increasing the diameter of the affected side. Pleural pressure does not become more negative.
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