A subject referred for pulmonary function tests because of shortness of breath has an FEV₁ of 98%.This finding is suggestive of: A) Restrictive lung disease B) Obstructive lung disease C) Normal lung function D) Upper airway abnormality

Question

Quizplus · Accepted Answer

An FEV1/FVC ratio of 98% indicates a normal lung function. This ratio represents the amount of air a person can forcefully exhale in one second divided by the total amount of air they can forcefully exhale. In obstructive lung disease, this ratio is typically decreased whereas in restrictive lung disease, it is often normal or increased. Upper airway abnormalities would not be reflected in this test.

A Subject Referred for Pulmonary Function Tests Because of Shortness