Calculate the static compliance given the following clinical data: tidal volume 600 mL, peak in-spiratory pressure (PIP) 40 cm H2O, plateau pressure (Pplateau) 30 cm H2O, positive end-expiratory pressure (PEEP) 15 cm H2O,
and tubing compliance (CT) 2 mL/cm H2O.
a. 14.5 mL/cm H2O
b. 38 mL/cm H2O
c. 55 mL/cm H2O
d. 58 mL/cm H2O
ANS: B
Static compliance = tidal volume (VT) − [(Pplateau − PEEP) ? CT]/(Pplateau − PEEP) = 600 − [(30 − 15) ? 2]/30 − 15 = 570/15 = 38 mL/cm H2O.
Health Professions
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