What are the typical pulmonary function test results in a patient with interstitial lung disease? 1. Decreased airway resistance 2. Decreased forced expiratory volumes 3. Increased airway resistance 4. Normal to elevated FEV1/FVC
a. 1, 2, and 4 only
b. 2 and 4 only
c. 3 only
d. 2, 3, and 4 only
ANS: B
In ILD, both forced expiratory volume in 1 second (FEV1) and forced vital capacity (FVC) are diminished, while the FEV1/FVC ratio is preserved or even supranormal.
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