During transport, an infant who is using a Bio-Med MVP-10 unit in the intermittent mandatory ventilation mode with 60% fractional inspired oxygen requires 3 L/min of oxygen and 2 L/min of air
to maintain the fractional inspired oxygen and desired peak pressure. An E cylinder with 2200 pounds per square inch gauge of oxygen would last _____ minutes.
a. 88.8 c. 207.3
b. 155.5 d. 314.3
ANS: A
Pressure of gas supply = tank pressure ? conversion factor = 2200 pounds per square inch gauge ? 0.28 = 622 L. 622 L ÷ (3 L/min for the oxygen + 4 L/min for the fluidic logic) = 622 ÷ 7 = 88.8 minutes.
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