Essential capabilities of an adult intensive care unit (ICU) ventilator include all of the following except:
a. expiratory pause.
b. pressure control modes.
c. flow rates up to 250 L/min.
d. respiratory rates up to 60 breaths/min.
ANS: C
Flow rates up to 180 L/min are suggested for adult ICU ventilators. Expiratory pause is used to measure intrinsic positive end-expiratory pressure (PEEP). The pressure control modes are essen-tial for the ventilation of patients with low lung compliance. Respiratory rates of between 1 and 6 breaths/min are essential.
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