Most portable home liquid O2 systems can provide low-flow O2 (2 L/min) for approximately how long?
a. 1 to 3 hr
b. 3 to 5 hr
c. 8 to 12 hr
d. 5 to 8 hr
ANS: D
Most portable units come with a carrying case or small cart and can provide 5 to 8 hr of O2 at a flow of 2 L/min.
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