The respiratory therapist should expect which of the following findings while ventilating a pa-tient with acute respiratory distress syndrome (ARDS)?
a. An elevated plateau pressure (Pplateau)
b. A decreased elastic resistance
c. A low peak inspiratory pressure (PIP)
d. A large transairway pressure (PTA) gradient
ANS: A
ARDS is a pathological condition that is associated with a reduction in lung compliance. The formula for static compliance (CS) utilizes the measured plateau pressure (Pplateau) in its denomi-nator (CS = VT /(Pplateau − EEP). Therefore, with a consistent exhaled tidal volume (VT), an ele-vated Pplateau will decrease CS.
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