The "Sigmoid" Shape of the Static Pressure-Volume Lung Recruitment Maneuver

Multiple Choice

The "sigmoid" shape of the static pressure-volume lung recruitment maneuver indicates which of the following?

A) All parts of the lungs open with the same pressure.
B) Independent portions of the lungs open with the same pressure.
C) Dependent portions of the lungs open with different pressures.
D) Lung units open at different times with different pressures.