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A nurse is preparing to administer phenobarbital 2 mg/kg/day IV divided in 2 equal doses to a client who weighs 165 lb. Available is phenobarbital 65 mg/mL. How many ml should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Answer and Explanation

The Correct Answer is ["1.2"]

To calculate the mL of phenobarbital to administer per dose, you can use the following steps:

    Convert the client's weight from pounds to kilograms. There are approximately 2.2 pounds in 1 kilogram.
Weight in kg = 165 lb / 2.2 lb/kg ≈ 75 kg
    
    Calculate the total daily dose based on the client's weight and the prescribed dose per kilogram:
Total daily dose = 2 mg/kg/day × 75 kg ≈ 150 mg/day
    
    Since the dose is divided into two equal doses per day, calculate the dose per dose:
Dose per dose = Total daily dose / 2 = 150 mg / 2 = 75 mg
    
    Now, you need to find out how many mL of phenobarbital 65 mg/mL corresponds to a dose of 75 mg:
Volume (mL) = Dose (mg) / Concentration (mg/mL) = 75 mg / 65 mg/mL ≈ 1.1538 mL
    
Rounded to the nearest tenth, the nurse should administer approximately 1.2 mL of phenobarbital per dose.
 


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Related Questions

Correct Answer is ["10"]

Explanation

To determine how many milliliters (mL) of the reconstituted penicillin G potassium to administer, you can use the following calculation:

Given:

  • Reconstituted concentration: 100,000 units/mL
  • Total dose to be administered: 1,000,000 units

Now, use the formula:

Volume (mL) = Total dose (units) / Concentration (units/mL)

Volume (mL) = 1,000,000 units / 100,000 units/mL

Volume (mL) = 10 mL

So, the nurse should administer 10 mL of the reconstituted penicillin G potassium.

Correct Answer is ["150"]

Explanation

To calculate the IV pump rate, you need to divide the total volume (1,200 ml) by the total infusion time (8 hours). Here's the calculation:

IV Pump Rate (ml/hr) = Total Volume (ml) / Total Infusion Time (hr)

IV Pump Rate (ml/hr) = 1,200 ml / 8 hr

IV Pump Rate (ml/hr) = 150 ml/hr

So, the nurse should set the IV pump to deliver 150 ml/hr.

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