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Discussion

HELP! What am I doing wrong with this calculation?

For the life of me, I can't figure this out (dimensional analysis). Anyone out there with a clear head...I must be very tired!! Thanks.

A Dopamine drip (400mg in 250 cc of IV fluid) is infusing on your 80 kg patient at 20 cc/hour. How many mcg/kg/min are infusing for this patient?

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    a dopamine drip (400mg in 250 cc of iv fluid) is infusing on your 80 kg patient at 20 cc/hour. how many mcg/kg/min are infusing for this patient?

    400 mg/250 cc
    (dose on hand)
    x 1/80 kg
    (patient's weight)
    x 20cc/hour
    (infusion rate)
    x b1000 mcg?1 mg
    (conversion factor)
    x 1 hour/60 minutes
    (conversion factor)
    =
    6.66 mcg/kg/min

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    that is correct

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    however, do not forget to round your answer at the end....

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    mcg= 1000mcg/1mg x 400mg/250cc x 20cc/hr x 1hr/60min x wt/80kg =

    kg/hr

    8,000,000/1,200,000 = 6.66 or 6.7mcg/kg/min.

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