Vital capacity is decreased, timed vital capacity (FEV 1.0 %) is normal in______________?
Correct answer: C. Scoliosis
- A. Bronchial asthma
- B. Chronic bronchitis
- C. Scoliosis
- D. Acute bronchitis
Explanation
Scoliosis produces a restrictive ventilatory defect, reducing vital capacity while preserving the FEV₁/FVC percentage. Asthma and chronic bronchitis are obstructive disorders that usually reduce this percentage.
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