A nurse is preparing to administer gentamicin 2 mg/kg IM to a school-age child who weighs 55 lb. Available gentamicin injection 40 is 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.)
The Correct Answer is ["1.3"]
Step-by-step calculation:
The child's weight is 55 lb.
The medication dosage is 2 mg/kg.
The available medication concentration is 40 mg/mL.
Calculating the total dose in mg:
Convert the child's weight to kg: 55 lb ÷ 2.2 lb/kg = 25 kg
Calculate the total dose: 25 kg × 2 mg/kg = 50 mg
Calculating the volume to administer:
Use the concentration of the medication: 50 mg ÷ 40 mg/mL = 1.25 mL
Rounding the answer: 1.25 rounds to 1.3 mL
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Related Questions
Correct Answer is ["3.9"]
Explanation
Let's break down the calculation step by step:
Understanding the information:
The child's weight is 26 lb.
The medication dosage is 2 mg/kg/day.
The available medication concentration is 15 mg/5 mL.
The medication is to be divided into two equal doses per day.
Calculating the total dose per day in mg:
Convert the child's weight to kg:
26 lb ÷ 2.2 lb/kg = 11.82 kg
Calculate the total dose per day:
11.82 kg × 2 mg/kg/day = 23.64 mg/day
Calculating the dose per dose:
Divide total dose by 2: 23.64 mg/day ÷ 2 doses/day = 11.82 mg/dose
Calculating the volume to administer per dose:
Use the concentration of the medication: 11.82 mg ÷ (15 mg/5 mL) = 11.82 mg ÷ 3 mg/mL = 3.94 mL
Rounding the answer:
3.94 rounds to 3.9 mL
Correct Answer is ["3.5"]
Explanation
Convert the child’s weight from pounds to kilograms:
52 lb÷2.2=23.6 kg.
Calculate the total daily dose in micrograms (mcg):
7.5 mcg/kg/day×23.6 kg=177 mcg/day.
Determine the volume in mL to administer:
The elixir concentration is 50 mcg/mL
177 mcg÷50 mcg/mL=3.54 mL.
Round to the nearest tenth:
3.54 rounds to 3.5 mL.
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