A nurse is preparing to administer epinephrine 0.01 mg/kg subcutaneous to a school-age child who weighs 66 lb. Available is epinephrine injection 1 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 ["0.3"]
Calculation:
Convert the child's weight from pounds (lbs) to kilograms (kg):
Formula: Weight in kg = Weight in lbs / 2.2 lbs/kg
= 66 lbs / 2.2 lbs/kg
= 30 kg
Calculate the total dose of epinephrine needed in milligrams:
Ordered dose: 0.01 mg/kg
Child's weight in kg: 30 kg
Formula: Total dose (mg) = Ordered dose (mg/kg) × Child's weight (kg)
= 0.01 mg/kg × 30 kg
= 0.3 mg
Determine the concentration of the available epinephrine injection:
Available concentration: 1 mg/mL
Calculate the volume of epinephrine to administer:
Formula: Volume to administer (mL) = Desired dose (mg) / Concentration (mg/mL)
= 0.3 mg / 1 mg/mL
= 0.3 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["200"]
Explanation
Calculation:
Determine the total volume to be infused:
Total volume: 100 mL
Determine the total infusion time in hours:
Infusion time: 30 minutes
Conversion: 30 minutes / 60 minutes/hour = 0.5 hours
Calculate the IV pump flow rate in mL/hr:
Formula: Flow rate (mL/hr) = Total volume (mL) / Total time (hours)
= 100 mL / 0.5 hours
= 200 mL/hr
Correct Answer is ["38"]
Explanation
Calculation:
Calculate the total amount of lidocaine in milligrams:
Available lidocaine: 1 g
Conversion: 1 g × 1000 mg/g = 1000 mg
Determine the concentration of the lidocaine solution in milligrams per milliliter:
Total lidocaine: 1000 mg
Total volume of solution: 250 mL
Formula: Concentration (mg/mL) = Total milligrams / Total mL
= 1000 mg / 250 mL
= 4 mg/mL
Calculate the desired dose of lidocaine per hour in milligrams:
Ordered dose: 2.5 mg/min
Conversion: 2.5 mg/min × 60 min/hr
= 150 mg/hr
Calculate the IV pump flow rate in mL/hr:
Formula: Flow rate (mL/hr) = Desired dose per hour (mg/hr) / Concentration (mg/mL)
= 150 mg/hr / 4 mg/mL
= 37.5 mL/hr
Round the answer to the nearest whole number:
37.5 mL/hr rounded to the nearest whole number is 38 mL/hr.
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