A patient's lung compliance was measured using an intraesophageal balloon (a measure of pleural pressure). When he has inspired 500 mL, his intraesophageal pressure decreases from –3 cm H2O at FRC to –7 cm H2O. What is his lung compliance?
A. 1.67 L cm H2O
B. 0.71 L/cm H2O
C. 0.500 L/cm H2O
D. 0.125 L/cm H2O
ANS: D
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