The patient having pulmonary function studies performed has a spirometry test and a FEV1/FVC ratio of 60%. What does this indicate?
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 one second to force vital capacity. Obstructive lung disease is characterized by a FEV1/FVC ratio less than 70%.
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