HESI RN
RN Hesi Med Surg Dosage Calculations Questions
Extract:
Question 1 of 5
The nurse is initiating a prescription for Dextrose 2.5% in 0.45% Sodium Chloride (Ds 0.5% NS) at 45 mL/hour for a child with dehydration. The nurse attaches a volume control administration set with a micro-drip chamber to the bag of solution. How many micro-drops/minute should the nurse regulate the infusion? (Enter the numerical value only. If rounding is required, round to the nearest whole number.)
Correct Answer: 45
Rationale: Micro-drip factor = 60 drops/mL. Flow rate = (45 × 60) / 60 = 45 micro-drops/min.
Question 2 of 5
The healthcare provider prescribes metoclopramide 7.5 mg/mL IM every 3 hours PRN vomiting for a client who is receiving chemotherapy. The nurse prepares an injection using a 2 ml. prefilled syringe cartridge labeled, 'metoclopramide 5 mg/mL.' How many mL should the nurse administer? (Enter numeric value only. If rounding is required, round to the nearest tenth.)
Correct Answer: 1.5
Rationale: Volume = 7.5 mg / 5 mg/mL = 1.5 mL.
Question 3 of 5
The healthcare provider prescribes ganciclovir 375 mg intravenously (IV) every 12 hours to infuse over 90 minutes. The pharmacy delivers ganciclovir 375 mg in a 150 mL IV bag. How many mL/hour should the nurse program the infusion pump? (Enter a whole number only.)
Correct Answer: 100
Rationale: Infusion rate = 150 mL / (90 / 60) hours = 100 mL/hour.
Question 4 of 5
A client is receiving a 200 mL bolus of 0.9% normal saline (NS) to be infused over 20 minutes. The nurse should set the Infusion pump to deliver how many mL/hour? (Enter numeric value only.)
Correct Answer: 600
Rationale: Infusion rate = 200 mL / (20 / 60) hours = 600 mL/hour.
Question 5 of 5
The healthcare provider prescribes ceftazidime 30 mg/kg/day for an infant weighing 3,500 grams. What dose should the nurse administer daily to this infant? (Enter numeric value only.)
Correct Answer: 105
Rationale: Weight: 3500 g = 3.5 kg. Dose: 30 mg/kg/day × 3.5 = 105 mg/day.