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A nurse is preparing to administer a loading dose of phenytoin 10 mg/kg by IV bolus to a client who weighs 154 lb. Available is phenytoin50 mg/mL. How many mL should the nurse administer?
(Round the answer to the nearest whole number. Use a leading zero if it applies t use a trailing zero.)
Answer and Explanation

The Correct Answer is ["14"]

To answer this question, the nurse needs to perform the following steps: 

Convert the client's weight from pounds to kilograms by dividing it by 2.2. 154 lb / 2.2 =  70 kg. 

Multiply the client's weight by the loading dose of phenytoin to get the total dose in  milligrams. 70 kg x 10 mg/kg = 700 mg. 

Divide the total dose by the concentration of phenytoin to get the volume in milliliters.  700 mg / 50 mg/mL = 14 mL. 

Round the volume to the nearest whole number. The nurse should administer 14 mL of  phenytoin by IV bolus. 


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Related Questions

Correct Answer is ["1.9"]

Explanation

To calculate the dose of dexamethasone, we need to convert the client's weight from pounds to kilograms. One pound is equal to 0.454 kg, so 132 lb is equal to 132 x 0.454 = 59.928 kg. The prescribed dose is 0.5 mg/kg/day, so the daily dose is 0.5 x 59.928 = 29.964 mg. This dose is divided equally every 6 hours, so the dose per administration is 29.964 / 4 = 7.491 mg. The concentration of the drug is 4 mg/mL, so the volume per administration is 7.491 / 4 = 1.873 mL. Rounded to the nearest tenth, the nurse should administer 1.9 mL per dose.

Correct Answer is ["3.5"]

Explanation

  1. Convert the client's weight from pounds to kilograms:

    • 154 lb ÷ 2.2 lb/kg = 70 kg

  2. Calculate the total dose required:

    • 0.25 mg/kg × 70 kg = 17.5 mg

  3. Determine the volume to administer:

    • Given concentration: 5 mg/mL
    • 17.5 mg ÷ 5 mg/mL = 3.5 mL

  4. Rounding to the nearest tenth:

    • The answer remains 3.5 mL

So the nurse should administer 3.5 mL of diltiazem IV injection.

which is 17.5 mg / 5 mg/mL = 3.5 mL. Rounding to the nearest tenth, the nurse should administer 3.5 mL of diltiazem IV injection.

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