RN Hesi Med Surg Dosage Calculations | Nurselytic

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RN Hesi Med Surg Dosage Calculations Questions

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Question 1 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 2 of 5

A client scheduled for coronary artery bypass surgery is to receive an intravenous infusion of 1 gram cefazolin in 50 mL 0.9% Sodium Chloride, USP over 30 minutes. The nurse should program the infusion pump to deliver how many mL/hour? (Enter numeric value only, as a whole number.)

Correct Answer: 100

Rationale: Infusion rate = Volume / Time. Volume is 50 mL, time is 30 minutes = 0.5 hours. So, 50 / 0.5 = 100 mL/hour.

Question 3 of 5

A child is to receive vancomycin 40 mg/kg intravenously one hour before a scheduled procedure. The child weighs 44 pounds. How many mg of the medication should the nurse administer? (Enter numeric value only.)

Correct Answer: 798

Rationale: Weight: 44 × 0.4536 = 19.9584 kg. Dose: 40 mg/kg × 19.9584 = 798.336 mg, rounded to 798.

Question 4 of 5

A client who weighs 154 pounds receives a prescription for epoetin alfa 50 units/kg subcutaneously 3 times a week. The medication is available in 2000 units/ml. vial. How many mL should the nurse administer with each dose? (Enter numerical value only. If rounding is required, round to the nearest tenth.)

Correct Answer: 1.7

Rationale: Weight: 154 × 0.4536 = 69.8544 kg. Dose: 50 units/kg × 69.8544 = 3492.72 units. Volume: 3492.72 / 2000 = 1.74636 mL, rounded to 1.7 mL.

Question 5 of 5

The healthcare provider prescribes lamivudine oral solution 150 mg twice daily for a client who is HIV positive. The available bottle contains 240 mL of lamivudine labeled, '10 mg/mL.' How many mL should the nurse administer in a 24 hour period? (Enter numeric value only.)

Correct Answer: 30

Rationale: Dose per administration: 150 mg / (10 mg/mL) = 15 mL. Daily volume: 15 × 2 = 30 mL.

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