After placing a patient on a volume-cycled ventilator in the continuous mandatory ventilation assist-control mode, you note that 55 cm H2O pressure is required to deliver the preset VT of 950 ml

What high-pressure limit would you now set for this patient?
a. 60 cm H2O
b. 70 cm H2O
c. 80 cm H2O
d. 90 cm H2O

ANS: B
If the plateau pressure is less than 30 cm H2O, the high pressure limit can be adjusted to 10 to 20 cm H2O above the peak inspiratory pressure.