HESI RN Dosage Calculation Proctored Exam
Calculation
The healthcare provider prescribes dobutamine 6 mcg/kg/min IV for a client who weighs 140 pounds. The IV bag contains dobutamine 250 mg in 250 mL dextrose 5% in water (D5W). 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.)
mL/hr
Explanation & Rationale
Step 1: Convert weight from pounds to kilograms. 140 pounds ÷ 2.2 = 63.6364 kg Step 2: Calculate the total dosage in mcg/min. 6 mcg/kg/min × 63.6364 kg = 381.8184 mcg/min Step 3: Convert mcg to mg. 381.8184 mcg/min ÷ 1000 = 0.3818 mg/min Step 4: Identify the concentration. 250 mg ÷ 250 mL = 1 mg/mL Step 5: Calculate the infusion rate in mL/hr. 0.3818 mg/min × 60 min/hr = 22.908 mL/hr Rounded to the nearest tenth = 22.9 mL/hr
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