During your home care visit on Monday morning, you weigh the patient's portable liquid oxygen reservoir. The liquid oxygen weighs 18 lb, and the patient is using 2 L/min. When should you schedule a visit to fill up the reservoir?
a. The next Monday c. Thursday afternoon
b. Wednesday morn-ing d. Friday afternoon
ANS: B
18 lb/2.5 lb/L=7.2 L. 7.2 L ? 860 = 6192 L/2 L/min = 3096 minutes, or 51 hours 36 minutes, which is 2 days 3 hours 36 minutes. So it would have to be filled on Wednesday.
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