Dosage calculations, until they stop being scary
Problems are generated fresh every time, so there is nothing to memorise and no way to run out. Write the units at every step. That single habit prevents most of the errors this section is designed to catch.
Titration
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A client weighing 226 lb is ordered dopamine at 10 mcg/kg/min. The bag contains 400 mg in 500 mL. What rate will the nurse set?
mL/hr
Round to the nearest tenth.
Formula
mL/hr = (Dose × Weight × 60) ÷ Concentration (mcg/mL)
Where marks get lost
Dropping the ×60 that converts per-minute dosing into an hourly pump rate.