A 72-year-old hospice patient with metastatic colon cancer has been comfortable on a regimen of long-acting oral morphine 60 mg every 12 hours. He is now unable to swallow and is transitioning to the actively dying phase. The ACHPN needs to convert his basal opioid to a continuous subcutaneous infusion. Using a standard oral to parenteral morphine conversion ratio of 3:1, what is the correct initial rate for the continuous subcutaneous morphine infusion?
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A
5 mg/hour
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B
1.7 mg/hour
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C
10 mg/hour
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D
3.3 mg/hour