The control variables most often used to ventilate infants are which of the following?

a. Volume limited, time cycled ventilation
b. Pressure limited, time cycled ventilation
c. Pressure limited, pressure cycled ventila-tion
d. Volume limited, volume cycled ventilation

ANS: B
Infant ventilators most often limit the pressure delivered and end inspiration using inspiratory time. Volume limited, volume cycled ventilation is volume-controlled ventilation. Pressure lim-ited, pressure cycled ventilation is the type of breath used during intermittent positive pressure breathing (IPPB).