On inspecting a volume-pressure curve for a patient with restrictive lung disease, which of the following abnormalities would you expect to find?
1. Decrease in the slope of the volume-pressure curve
2. Increase in the area of the volume-pressure curve
3. Positive Ppl during exhalation
a. 2 only
b. 1, 2, and 3
c. 1 and 2 only
d. 1 and 3 only
ANS: C
In restrictive lung disease, the area of the volume-pressure curve is greater because the slope of the static component (compliance) is less than normal.
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