In what scenario is pressure-controlled ventilation (PCV) most often used?
a. When limiting plateau pressure is needed
b. When a pneumothorax is present
c. When the patient has chronic obstructive pulmonary disease
d. When bilateral pneumonia is present
ANS: A
PCV may be used immediately upon ventilator initiation when limiting the plateau pressure is a concern and in the care of patients expected to need prolonged inspiration or an increased 1:E ratio (1:1, 1.5:1, 2:1). These patients typically have acute lung injury or ARDS.
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