HESI RN
RN Hesi Med Surg Dosage Calculations Questions
Extract:
Question 1 of 5
A child with a seizure disorder receives a prescription for phenytoin 20 mg by mouth every 8 hours. The suspension is available in 125 mg/5 mL. How many ml. should the nurse administer? (Enter the numerical value only. If rounding is required, round to the nearest tenth.)
Correct Answer: 0.8
Rationale: Volume = 20 mg × (5 mL / 125 mg) = 0.8 mL.
Question 2 of 5
A client returns from the PACU with a bag of IV fluids that has 630 mL remaining in the 1,000 mL bag. The prescription reads, 'Continue the present IV over the next 7 hours.' The IV administration set delivers 10 gtt/mL. The nurse should regulate the infusion to deliver how many drops/minute to accomplish the new prescription? (Enter numeric value only.)
Correct Answer: 15
Rationale: Flow rate = (630 mL × 10 gtt/mL) / (7 × 60) = 15 gtt/min.
Question 3 of 5
A client with human immunodeficiency virus (HIV) begins active labor at 38 weeks gestation and receives a prescription for zidovudine 2 mg/kg IV, to be administered over 1 hour. The client weighs 185 lbs. Based on the client's weight, how many mg should the nurse prepare to administer? (Enter numerical value only. If rounding is required, round to the nearest whole number.)
Correct Answer: 168
Rationale: Weight: 185 / 2.2 = 84.09 kg. Dose: 2 mg/kg × 84.09 = 168.18 mg, rounded to 168 mg.
Question 4 of 5
The healthcare provider prescribes heparin 1,400 units/hour intravenously (IV). The IV bag contains heparin 20,000 units in 250 mL dextrose 5% in water. 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 whole number.)
Correct Answer: 18
Rationale: Infusion rate = (1400 units/hour × 250 mL) / 20000 units = 17.5 mL/hour, rounded to 18.
Question 5 of 5
The healthcare provider prescribes filgrastim 5 mog/kg/day subcutaneously for a client who weighs 132 pounds and has just completed chemotherapy. The medication is available in 480 mcg/0.8 mL. How many mL should the nurse administer? (Enter numerical value only. If rounding is required, round to the nearest tenth.)
Correct Answer: 0.5
Rationale: Weight: 132 / 2.2 = 60 kg. Dose: 5 mcg/kg/day × 60 = 300 mcg/day. Concentration: 480 mcg / 0.8 mL = 600 mcg/mL. Volume: 300 / 600 = 0.5 mL. [
Note: Document states 500.0 mL, likely a typo; correct calculation yields 0.5 mL.]