A nurse is preparing to administer phenobarbital 5 mg/kg/day PO divided in equal doses every 12 hr to a client who weighs 54 lb. Available is phenobarbital elixir 20 mg/5 mL. The nurse should administer how many mL per dose? (Round answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["15.3"]
Step-by-step solution:
1. Convert pounds to kilograms:
1 lb = 0.453592 kg
54 lb x 0.453592 kg/lb = 24.49 kg
2. Calculate the total daily dose of phenobarbital:
Total daily dose = dose per kg/day x weight in kg = 5 mg/kg/day x 24.49 kg = 122.45 mg/day
3. Calculate the dose per administration:
Since the medication is divided into 2 doses per day,
Dose per administration = Total daily dose / number of doses = 122.45 mg/day / 2 doses = 61.225 mg/dose
4. Calculate the volume to administer:
The medication concentration is 20 mg/5 mL, which simplifies to 4 mg/mL.
Volume = Dose per administration / Concentration = 61.225 mg / 4 mg/mL = 15.30625 mL
5. Round to the nearest tenth:
Volume = 15.3 mL
Therefore, the nurse should administer 15.3 mL of phenobarbital per dose.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["84"]
Explanation
The nurse should administer 8.4 mg of enoxaparin per dose.
Calculations:
Convert pounds to kilograms:
185 lb x 0.453592 kg/lb = 83.91 kg
Calculate the enoxaparin dose:
1 mg/kg x 83.91 kg = 83.91 mg
Round to the nearest tenth:
83.91 mg ≈ 84 mg
Therefore, the nurse should administer 84 mg of enoxaparin per dose.
Correct Answer is ["300"]
Explanation
Understanding the problem
We need to administer 150 mL of the medication over 30 minutes.
We need to determine the flow rate in mL/hr.
Step-by-step calculation
Convert minutes to hours:
30 minutes = 0.5 hours
Calculate the flow rate:
Flow rate (mL/hr) = Total volume (mL) / Infusion time (hours) = 150 mL / 0.5 hours = 300 mL/hr
Therefore, the nurse should set the IV pump to deliver 300 mL/hr.
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