What is the maximum available tidal volume for a time-triggered, pressure-limited, time-cycled infant ventilator with the flow rate set at 8 L/min and the inspiratory time at 0.4 second?
a. 19 mL c. 53 mL
b. 22 mL d. 88 mL
ANS: C
Tidal volume (liters) = [Inspiratory time (seconds) ? Flow (L/min)] ÷ 60 = [0.4 ? 8] ÷ 60 = 0.053 L, or 53 mL.
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