Questions 55

HESI RN

HESI RN Test Bank

RN Hesi Med Surg Dosage Calculations Questions

Extract:


Question 1 of 5

A client receives a prescription for hydrocortisone sodium succinate 150 mg intravenously STAT. The powdered medication needs to be reconstituted with 2 mL of bacteriostatic water that will provide a solution of 250 mg/mL. How many mL should the nurse administer? (Enter numerical value only.)

Correct Answer: 0.6

Rationale: Volume = Dose / Concentration = 150 mg / 250 mg/mL = 0.6 mL.

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 an IV bolus of diltiazem 0.25 mg/kg for a client with atrial fibrillation. The client weighs 178 pounds. How many mg should the nurse administer? (Enter numeric value only. If rounding is required, round to the nearest whole number.)

Correct Answer: 20

Rationale: Weight: 178 pounds / 2.2 = 80.91 kg. Dose: 0.25 mg/kg × 80.91 = 20.2275 mg, rounded to 20 mg.

Question 4 of 5

Penicillin G procaine 240,000 units Intramuscularly is prescribed for a 4-year-old child who has a streptococcal respiratory Infection. The medication vial is labeled 1,200,000 units/2 mL. How many ml. should the nurse administer? (Enter numeric value only. If rounding is required, round to the nearest tenth.)

Correct Answer: 0.4

Rationale: Concentration: 1,200,000 units / 2 mL = 600,000 units/mL. Volume = 240,000 / 600,000 = 0.4 mL.

Question 5 of 5

The nurse is preparing to administer methylprednisolone 40 mg IV. The medication vial is labeled '125 mg per 2 mL.' How many mL of medication should the nurse administer? (Enter numeric value only. If rounding is required, round to the nearest hundredth.)

Correct Answer: 0.64

Rationale: Concentration: 125 mg / 2 mL = 62.5 mg/mL. Volume = 40 / 62.5 = 0.64 mL.

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