Help near this dosage addition problem?

The doctor has ordered Dopamine 3mcg/kg/min IV.You have an IV bag beside 400 mg Dopamine in 200 cc DSW.The drop factor is 15 gtts/ml.The patient weighs 150 lbs.
What`s the flow rate contained by ml/hr?
What`s the flow rate in gtts/min?
How many mg will the patient receive within 1 hour.
Answers:
call a pharmacist! Preferably a hospital pharmacist.
Do your own homework.
Tip: Make sure to convert the rate and the IV concentration to the same unit.
First, ALWAYS include the units when doing calculations. If the units that remain after you reverse where appropriate are what's required in the answer, then the setup is probably correct. Also, when doing calculation where mcg and mg are in the same problem, it is best to convert the mg into mcg (1mg = 1000mcg).

Convert the solidity into kg.
150lb * (1kg/2.2lb) = 68.2kg (lb cancels out)

Calculate the dose in mcg/min
3mgc/kg/min * 68.2kg = 204.6mcg/min

mg/hr?
204.6mcg/min * 60min/hr = 12276mcg/hr (min cancels out)
12276mcg/hr * (1mg/1000mcg) = 12.276mg/hr (mcg cancel out)

400mg = 400000mcg

ml/hr?
(200ml/400000mcg) * (12276mcg/hr) = 6.1ml/hr (or 6ml/hr)

gtts/min
(6ml/hr) * (1hr/60min) * (15gtts/ml) = 1.5gtts/min
(3gtts/2min, easier to count)


If you have any questions you can im or email me Source(s): Pharmacist

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