A nurse is preparing to administer ondansetron 0.1 mg/kg IV bolus to a toddler who weighs 32 lb. Available is ondansetron injection 2 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.)
The Correct Answer is ["0.73"]
Step 1: Convert the toddler's weight from pounds to kilograms.
The conversion factor is 1 kg = 2.2 lb.
Weight in kg= 32/2.2≈14.55 kg
Step 2: Calculate the required dose of ondansetron in mg.
Total dose of ondansetron needed:
Dose in mg=0.1 mg/kg×14.55 kg=1.455 mg
Step 3: Determine the volume of ondansetron to administer.
To determine how many mL the nurse should administer, we use the formula:
Volume (mL)=Dose in mg/Concentration in mg/mL=1.455 mg/2 mg/mL=0.7275 mL
Step 4: Round the answer.
Rounding off 0.7275 mL gives 0.73 mL.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["0.3"]
Explanation
Step by step calculation:
The desired dose of promethazine is 15 mg.
The available concentration is 50 mg/mL.
Calculating the volume to administer:
Use the concentration of the medication: 15 mg ÷ 50 mg/mL = 0.3 mL
Correct Answer is ["0.45"]
Explanation
Calculating the total dose in mg:
Convert the child's weight to kg: 74 lb ÷ 2.2 lb/kg = 33.64 kg
Calculate the total dose: 33.64 kg × 4 mcg/kg = 134.56 mcg
Converting mcg to mg:
1 mg = 1000 mcg
134.56 mcg ÷ 1000 mcg/mg = 0.13456 mg
Calculating the volume to administer:
Use the concentration of the medication: 0.13456 mg ÷ 0.3 mg/mL = 0.45 mL
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