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 ["0.24"]
Explanation
Step 1: Convert the infant's weight from pounds to kilograms.
To convert pounds to kilograms, we use the conversion factor 1 kg = 2.2 lb.
Weight in kg= 21/2.2≈9.55 kg
Step 2: Calculate the total daily dose of clindamycin in mg.
Total dose in mg/day=15 mg/kg/day×9.55 kg=143.25 mg/day
Step 3: Divide the total daily dose into 4 equal doses (every 6 hours).
We divide the total daily dose by 4:
Dose per administration=143.25 mg/4=35.8125 mg/dose
Step 4: Determine the volume to administer per dose.
The available clindamycin phosphate injection concentration is 150 mg/mL. To determine how many mL the nurse should administer per dose, we use the following formula:
Volume (mL)=Dose in mg/Concentration in mg/mL=35.8125 mg/150 mg/mL=0.238 mL
Step 5: Round the answer.
Rounding off 0.238 mL gives 0.24 mL.
Correct Answer is ["240"]
Explanation
Step-by-step calculation:
The nurse needs to administer 120 mL of sodium chloride.
The infusion time is 30 minutes.
Calculating the flow rate in mL/hr:
Convert the infusion time to hours: 30 minutes ÷ 60 minutes/hour = 0.5 hours
Divide the total volume by the infusion time: 120 mL ÷ 0.5 hours = 240 mL/hour
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