HESI Exit Exam A
Calculation
A child with an Escherichia coli urinary tract infection is receiving a secondary infusion of gentamicin 60 mg every 8 hours IV, which is to be infused over 30 minutes. The medication is delivered by the pharmacy diluted in a 50 ml bag of saline. What should be the infusion pump’s regulation in mL/hour? (Provide the numeric value only.)
mL/hour
Explanation & Rationale
Step 1: The child is receiving gentamicin 60 mg every 8 hours IV, which is to be infused over 30 minutes. The medication is delivered by the pharmacy diluted in a 50 ml bag of saline. Step 2: We need to find the infusion pump’s regulation in mL/hour. Step 3: Since the medication is to be infused over 30 minutes, we convert this to hours by dividing by 60. So, 30 minutes is 0.5 hours. Step 4: The rate of infusion is then the total volume (50 mL) divided by the time in hours (0.5 hours). Step 5: So, the infusion pump’s regulation is (50 mL ÷ 0.5 hours) = 100 mL/hour.
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