An "E" size cylinder with 1600 psig is used to provide oxygen to a simple mask running at 5 L/min during a transport. The cylinder will last:
a. 8 hours. c. 68 minutes.
b. 56 minutes. d. 89 minutes.
ANS: D
Amount of time left in cylinder = (cylinder pressure ? cylinder factor)/flow rate of gas (li-ters/minute). "E" size factor = 0.28. A simple mask should run at a minimum of 5 L/min. There-fore, (1600 ? 0.28)/5 L/min = 448/5 = 89.6 minutes.
Health Professions
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