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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 ["0.75"]

Explanation

To calculate the volume of heparin (in milliliters) to administer, you can use the following formula:

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

In this case, the desired dose is 7,500 units, and the concentration is 10,000 units/mL.

Volume (mL) = 7,500 units / 10,000 units/mL

Volume (mL) = 0.75 mL

So, the nurse should administer 0.75 mL of heparin.

Correct Answer is ["0.4"]

Explanation

To calculate the mL of enoxaparin to administer, you can use the following formula:

Volume (mL) = Dose (mg) / Concentration (mg/mL)

In this case, the dose is 40 mg, and the concentration is 100 mg/mL:

Volume (mL) = 40 mg / 100 mg/mL = 0.4 mL

So, the nurse should administer 0.4 mL of enoxaparin.

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