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No.

1 : A nurse is preparing to administer diazepam 0.3 mg/kg IV bolus to a toddler who weighs 24 lb. Available is diazepam injection 5 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest hundredth. Use a leading zero if it applies. Do not use a trailing zero.)

Hint : Always convert lb to kg before calculating mg/kg doses.

Correct Answers:

0.65

Rationale :

24 lb ÷ 2.2 = 10.9 kg 0.3 mg × 10.9 kg = 3.27 mg 3.27 mg ÷ 5 mg/mL = 0.65 mL

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2 : A nurse is preparing to administer ketorolac 0.4 mg/kg 1M to an adolescent who weighs 96.8 lb. The amount available is ketorolac 15 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

Hint : Round to the nearest tenth unless instructed otherwise.

Correct Answers:

Rationale :

Answer: 1.2 mL Explanation: 96.8 ÷ 2.2 = 44 kg 0.4 mg × 44 = 17.6 mg 17.6 ÷ 15 = 1.17 ≈ 1.2 mL

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3 : A nurse is preparing to administer 7.5 mL of ampicillin 250 mg oral suspension to a toddler who has otitis media. The nurse should recognize that 7.5 mL is equivalent to how many teaspoons? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

Hint : 1 tsp = 5 mL; 1 Tbsp = 15 mL

Correct Answers:

Rationale :

1 tsp = 5 mL → 7.5 ÷ 5 = 1.5 teaspoons

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4 : A nurse is preparing to administer dextrose 5% in 0.9% sodium chloride 125 mL IV to infuse over 15 min. The nurse should set the IV pump to deliver how many mL/hr? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

Hint : Convert minutes to hours: (volume ÷ time in min) × 60 = mL/hr

Correct Answers:

Rationale :

125 ÷ 15 × 60 = 500 mL/hr

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5 : A nurse is preparing to administer dextrose 5% in water 800 mL IV to infuse over 6 hr to an adolescent client. The nurse should set the IV pump to deliver how many mL/hr? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

Hint : Round to the nearest whole number.

Correct Answers:

Rationale :

800 ÷ 6 = 133.3 ≈ 133 mL/hr

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6 : A nurse is preparing to administer morphine 0.1 mg/kg IV bolus every 3 to 4 hr PRN for pain to a school-age child who weighs 51 lb. Available is morphine injection 2 mg/mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

Hint : Watch for rounding to the nearest tenth.

Correct Answers:

Rationale :

51 ÷ 2.2 = 23.2 kg 0.1 × 23.2 = 2.32 mg 2.32 ÷ 2 = 1.16 ≈ 1.2 mL

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7 : A nurse is preparing to administer ephedrine 3 mg/kg/day IV bolus divided in equal doses every 6 hr to a school-age child who weighs 70 lb. Available is ephedrine injection 50 mg/mL. How many mL should the nurse administer per dose?(Round the answer to the nearest hundredth. Use a leading zero if it applies. Do not use a trailing zero.)

Hint : Divide daily dose by number of doses for scheduled meds.

Correct Answers:

0.48

Rationale :

70 ÷ 2.2 = 31.8 kg 3 mg × 31.8 = 95.4 mg/day 95.4 ÷ 4 doses/day = 23.85 mg/dose 23.85 ÷ 50 = 0.48 mL

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8 : A nurse is reviewing a new prescription for dexamethasone 0.2 mg/kg/day PO in two divided doses for a child who weighs 66 lb. The amount available is dexamethasone 0.5 mg/5 mL elixir. How many mL should the nurse administer per dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

Hint : Use ratio/proportion when dealing with elixirs.

Correct Answers:

Rationale :

66 ÷ 2.2 = 30 kg 0.2 × 30 = 6 mg/day 6 ÷ 2 = 3 mg/dose Set up proportion: 0.5 mg : 5 mL = 3 mg : x → (3 × 5) ÷ 0.5 = 30 mL

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9 : A nurse is preparing to administer cephalexin 50 mg/kg/day PO divided in equal doses every 6 hr to a preschooler who weighs 37 lb. Available is cephalexin suspension 250 mg/5 mL. How many mL should the nurse administer per dose?(Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero)

Hint : Divide total daily dose first, then solve proportion.

Correct Answers:

Rationale :

37 ÷ 2.2 = 16.8 kg 50 × 16.8 = 840 mg/day 840 ÷ 4 = 210 mg/dose Set up proportion: 250 mg : 5 mL = 210 mg : x → (210 × 5) ÷ 250 = 4.2 mL

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10 : A nurse is preparing to administer acetaminophen 10 mg/kg PO every 4 to 6 hours PRN pain to a toddler who weighs 26.4 lb. Available is acetaminophen liquid 160 mg/5 mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if applicable. Do not use a trailing zero.)

Hint : Reconstituted doses require using the new concentration.

Correct Answers:

Rationale :

60 ÷ 50 = 1.2 mL

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Total Questions: 10

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RN Dosage Calculation~Nursing Care of Children 3.1

No.

1 : A nurse is preparing to administer diazepam 0.3 mg/kg IV bolus to a toddler who weighs 24 lb. Available is diazepam injection 5 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest hundredth. Use a leading zero if it applies. Do not use a trailing zero.)

2 : A nurse is preparing to administer ketorolac 0.4 mg/kg 1M to an adolescent who weighs 96.8 lb. The amount available is ketorolac 15 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

3 : A nurse is preparing to administer 7.5 mL of ampicillin 250 mg oral suspension to a toddler who has otitis media. The nurse should recognize that 7.5 mL is equivalent to how many teaspoons? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

4 : A nurse is preparing to administer dextrose 5% in 0.9% sodium chloride 125 mL IV to infuse over 15 min. The nurse should set the IV pump to deliver how many mL/hr? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

5 : A nurse is preparing to administer dextrose 5% in water 800 mL IV to infuse over 6 hr to an adolescent client. The nurse should set the IV pump to deliver how many mL/hr? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

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