Rn Hesi Med Surg Dosage Calculations
Rn Hesi Med Surg Dosage Calculations ( 55 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.)
To answer this question, we need to calculate the infusion rate in mL/hr using the formula:
Infusion rate (mL/hr) = Dose (mcg/min) x Weight (kg) x 60 min / Concentration (mcg/mL)
We are given the dose of dopamine as 3 mcg/kg/min and the weight of the client as 91 kg. We need to find the concentration of dopamine in the solution by dividing the amount of dopamine by the volume of the solution. We are given that there are 400 mg of dopamine in 250 mL of solution. We need to convert mg to mcg by multiplying by 1000. Therefore, we get:
Concentration (mcg/mL) = (400 mg x 1000 mcg/mg) / 250 mL
Concentration (mcg/mL) = 400000 mcg / 250 mL
Concentration (mcg/mL) = 1600 mcg/mL
Now we can plug in the values into the formula and get:
Infusion rate (mL/hr) = 3 mcg/kg/min x 91 kg x 60 min / 1600 mcg/mL Infusion rate (mL/hr) = 16380 mcg/min / 1600 mcg/mL
Infusion rate (mL/hr) = 10.2375 mL/hr
The nurse should program the infusion pump to deliver 10.2 mL/hr. This is the numeric value and it is rounded to the nearest tenth, as instructed.