HESI RN
RN Hesi Med Surg Dosage Calculations Questions
Extract:
Question 1 of 5
A client receives a prescription for warfarin 2 mg IM daily. The pharmacy delivers a vial labeled, warfarin 5 mg/single-use vial. The instructions read, reconstitute with 2.7 mL of sterile water for injection to yield 2 mg/mL. How many mL should the nurse administer? (Enter the numerical value only.)
Correct Answer: 1
Rationale: Volume: 2 mg / 2 mg/mL = 1 mL.
Question 2 of 5
A client with a gram-positive bacterial skin Infection is receiving daptomycin 500 mg IV every 24 hours. The pharmacy delivers a secondary Infusion of 0.9% Sodium Chloride with daptomycin 500 mg/100 ml to be infused in 30 minutes. How many mL/hour should the nurse program the infusion pump? (Enter the numerical value only.)
Correct Answer: 200
Rationale: Infusion rate = 100 mL / 0.5 hours = 200 mL/hour.
Question 3 of 5
The healthcare provider prescribes a hydration infusion of normal saline to run over 3 hours at 30 mL/kg for a client who is dehydrated and weighs 70 kg. The nurse should program the infusion pump to deliver how many mL/hour? (Enter numeric value only.)
Correct Answer: 700
Rationale: Volume: 30 mL/kg × 70 kg = 2100 mL. Infusion rate = 2100 / 3 = 700 mL/hour.
Question 4 of 5
Filgrastim 5 mcg/kg/day subcutaneous is prescribed for a child with cancer who weighs 88 pounds. The medication is labeled 300 mcg/mL. How many mL should the nurse administer daily to this child? (Enter the numerical value only. If rounding is required, round to the nearest tenth.)
Correct Answer: 0.7
Rationale: Weight: 88 × 0.454 = 39.952 kg. Dose: 5 mcg/kg/day × 39.952 = 199.76 mcg/day. Volume: 199.76 / 300 = 0.66587 mL, rounded to 0.7 mL.
Question 5 of 5
The healthcare provider prescribes streptomycin 200 mg intramuscularly every 12 hours. The vial is labeled, 'Streptomycin 1 gram/2.5 mL. How many milliliters should the nurse administer? (Enter numerical value only. (If rounding is required, round to the nearest tenth.))
Correct Answer: 0.5
Rationale: Concentration: 1 g = 1000 mg / 2.5 mL. Proportion: 1000 mg / 2.5 mL = 200 mg / x mL. Solving, x = (200 × 2.5) / 1000 = 0.5 mL.