What is the static lung compliance when the returned tidal volume is 500 mL, the baseline pres-sure is zero, and the plateau pressure reading is 25 cm H2O?
a. 0.02 L/cm H2O c. 0.2 L/cm H2O
b. 2.0 L/cm H2O d. 2.0 L/cm H2O
ANS: A
Static lung compliance = Volume ÷ (Plateau pressure – Positive end-expiratory pressure) = 0.5 L ÷ (25 cm H2O – 0 cm H2O) = 0.02 L/cm H2O.
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