Hesi Medical Dosage Calculation
Hesi Medical Dosage Calculation ( 53 Questions)
A client who weighs 91 kg receives a prescription for a continuous infusion of dopamine at 3 mcg/kg/min. The solution is labeled, "Dopamine 400 mg in 5% Dextrose Injection 250 mL." How many mL/hr should the nurse program the infusion pump to deliver? (Enter numeric value only. If rounding is required, round to the nearest tenth.)
First, find the total dosage per minute:
Total dosage = Weight × Dosage
Total dosage = 91 kg × 3 mcg/kg/min
Total dosage = 273 mcg/min
Now, convert mcg to mg (1 mg = 1000 mcg):
273 mcg/min ÷ 1000 = 0.273 mg/min
Next, determine the infusion rate in mL/hr:
The solution has 400 mg in 250 mL, so each mL contains:
400 mg ÷ 250 mL = 1.6 mg/mL
Infusion rate (mL/hour) = Total dosage per minute / Dosage per mL
Infusion rate = 0.273 mg/min / 1.6 mg/mL = 0.1706 mL/min
Converting minutes to hours:
0.1706 mL/min × 60 min/hour ≈ 10.236 mL/hour
= 10. 2 mL/hour (rounded to the nearest tenth)