PROBLEM SESSION ANSWERS: Problem 1

Using formulas or diagram:

FRC = ERV + RV so RV = FRC - ERV
TLC = VC + RV
IC = TLC - FRC

Values are normal for young adult male of "average" size.

Question: What if FRC = 4.0 L and other values are as above?
Answer: RV = 2.8 L, TLC = 7.6 L. What might cause such values? Gas trapping, such as in emphysema.