Your patient is having pulmonary-function studies performed. The patient has a spirometry test and has an FEV1/FVC ratio of 60%. You know that this indicates what?
A) Strong exercise tolerance
B) Exhalation volume is normal
C) Healthy lung volumes
D) Obstructive lung disease
Ans: D
Feedback: Spirometry is used to evaluate airflow obstruction, which is determined by the ratio of forced expiration volume in 1 second to forced vital capacity. Obstructive lung disease is apparent when an FEV1/FVC ratio is less than 70%. Therefore, options A, B, and C are incorrect.
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