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Hesi rn dosage calculation

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Total Questions : 50

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Question 1:

The healthcare provider prescribes filgrastim 5 mcg/kg SUBQ for a client who weighs 176 pounds. The available vial is labeled, filgrastim 300 mcg/mL. Based on the client's weight, how many milliliters should the nurse administer? (Enter numerical value only. If rounding is required, round to the nearest tenth.)

Answer and Explanation
Correct Answer: "1.3" mL

Explanation

Convert the client's weight from pounds to kilograms: 176 pounds ÷ 2.2 = 80 kg Calculate the total dose needed: 5 mcg/kg x 80 kg = 400 mcg

Calculate the volume to administer: 400 mcg ÷ 300 mcg/mL = 1.3L


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Question 2:

A client with neuroleptic malignant syndrome receives a prescription for dantrolene 5 mg/kg IV. The client weighs 132 pounds. The label on 250 mg vial reads, "Reconstitute with 5 mL sterile water for injection, USP. Reconstitution yields 50 mg/mL" How many mL should the nurse administer? (Enter numeric value only. If rounding is required, round to the nearest tenth.)

Answer and Explanation
Correct Answer: "1.8" mL

Explanation

Convert weight: 132 pounds ÷ 2.2 = 60 kg Total dose: 1.5 mg/kg × 60 kg = 90 mg

Volume to administer: 90 mg ÷ 50 mg/mL = 1.8 mL


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Question 3:

A child weighing 55 pounds is receiving ampicillin 300 mg/kg/24 hours intravenously (IV) in equally divided doses every 4 hours. How many mg should the nurse administer to the child for each dose? (Enter numeric value only. If rounding is required, round to the nearest tenth.)

Answer and Explanation
Correct Answer: "1","250" mg

Explanation

Convert weight: 55 pounds ÷ 2.2 = 25 kg

Total daily dose: 300 mg/kg × 25 kg = 7,500 mg

Dose per 4 hours: 7,500 mg ÷ 6 = 1,250 mg per dose


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Question 4:

A client with advance Parkinson's disease receives a prescription for apomorphine hydrochloride 3 mg subcutaneously. The medication is available in a 30 mg/3 mL prefilled syringe. How many mL should the nurse administer? (Enter numerical value only. If rounding is required, round to the nearest tenth.)

Answer and Explanation
Correct Answer: "0.3" mL

Explanation

Concentration: 30 mg/3 mL = 10 mg/mL

Volume to administer: 3 mg ÷ 10 mg/mL = 0.3 mL


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Question 5:

An adolescent with meningococcal meningitis is receiving a continuous IV infusion of penicillin G, which is prescribed as 20 million units in a total volume of 2 liters of normal saline every 24 hours. The pharmacy delivers 10 million units/liter of normal saline. How many ml/hour should the nurse program the infusion pump? (Enter numeric value only. If rounding is required, round to the nearest whole number.)

Answer and Explanation
Correct Answer: "83" mL/hour

Explanation

Total dose: 20 million units ÷ 10 million units/L = 2 L

Volume per hour: 2 L ÷ 24 hours = 0.083 L/hour = 83 mL/hour


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Question 6:

A client who weighs 91 kg receives a prescription for a continuous infusion of dopamine at 3 mcg/kg/min. The solution is labeled, "Dopamine 400 mg in 5% Dextrose Injection 250 ml." 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 tenth).

Answer and Explanation
Correct Answer: "6.8" mL/hr

Explanation

Dose required: 3 mcg/kg/min × 91 kg = 273 mcg/min

Convert to mg/min: 273 mcg/min ÷ 1,000 = 0.273 mg/min

Volume: 0.273 mg/min ÷ 400 mg/250 mL = 6.8 mL/hr


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Question 7:

The healthcare provider prescribes cytovene 375 mg every 12 hours to infuse over,90 minutes. The pharmacy delivers cytovene 375 mg in a 150 mL IV bag. How many mL/hour should the nurse program the infusion pump? (Enter a whole number only.)

Answer and Explanation
Correct Answer: "100" mL/hour

Explanation

Total volume: 150 mL

Time for infusion: 90 minutes = 1.5 hours

Infusion rate: 150 mL ÷ 1.5 hours = 100 mL/hour


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Question 8:

The healthcare provider prescribes metoclopramide 7.5 mg 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.)

Answer and Explanation
Correct Answer: "1.5" mL

Explanation

Dose required: 7.5 mg

Volume to administer: 7.5 mg ÷ 5 mg/mL = 1.5 mL


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Question 9:

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.)

Answer and Explanation
Correct Answer: "1" mL

Explanation

Concentration: 2 mg/mL

Volume to administer: 2 mg ÷ 2 mg/mL = 1 mL


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Question 10:

A child who weighs 30 kg is experiencing a grand mal seizure. The healthcare provider prescribes diazepam 0.3 mg/kg/dose IV STAT. The medication is available in 5 mg/mL vials. How many mL should the nurse administer? (Enter numeric value only. If rounding is required, round to the nearest tenth).

Answer and Explanation
Correct Answer: "1.8" mL

Explanation

Dose required: 0.3 mg/kg × 30 kg = 9 mg

Volume to administer: 9 mg ÷ 5 mg/mL = 1.8 mL


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