A nurse is preparing to administer ondansetron 0.15 mg/kg IV bolus to a school-age child who weighs 78 lb. Available is ondansetron solution for injection 2 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 ["2.7"]
Step 1: Convert the child's weight from pounds to kilograms.
We know that 1 kg = 2.2 lb,
Weight in kg=Weight in lb=78/2.2≈35.45 kg
Step 2: Calculate the required dose of ondansetron in mg.
The prescribed dose is 0.15 mg per kg:
Dose in mg=0.15 mg/kg×35.45 kg=5.318 mg
Step 3: Determine the volume of ondansetron to administer.
To determine how many mL the nurse should administer, we use the following formula:
Volume (mL)=Dose in mg/Concentration in mg/mL=5.318 mg/2 mg/mL=2.659 mL
Step 4: Round the answer:
Rounding 2.659 mL gives 2.7 mL.
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Related Questions
Correct Answer is ["1.3"]
Explanation
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
Correct Answer is ["2.1"]
Explanation
Step-by-step calculation:
The child's weight is 55 lb.
The medication dosage is 50,000 units/kg.
The available medication concentration is 600,000 units/mL.
Calculating the total dose in units:
Convert the child's weight to kg: 55 lb ÷ 2.2 lb/kg = 25 kg
Calculate the total dose: 25 kg × 50,000 units/kg = 1,250,000 units
Calculating the volume to administer:
Use the concentration of the medication: 1,250,000 units ÷ 600,000 units/mL = 2.0833 mL
Rounding the answer:2.0833 rounds to 2.1 mL
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