The results of pulmonary function testing show a normal total lung capacity and decreased, but reversible, FEV1 and FEV25-75. The patient is a 22-year-old, nonsmoking man with a history of intermittent "noisy breathing."
Which of the following is most likely the cause of his problem?
a. Asthma c. Pulmonary fibrosis
b. Emphysema d. Severe restrictive pulmonary disease
ANS: A
Asthma is a disease that shows reversibility in the FEV1 and FEV25-75. This reversibility, coupled with the fact that he is an otherwise healthy, nonsmoking, 22- year-old with a history of inter-mittent noisy breathing, makes asthma the best choice as the most likely cause of the problem.
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