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A nurse is preparing to administer vancomycin 15 mg/kg/day, divided equally every 12 hours. The client weighs 198 lb.

How many mg should the nurse administer with each dose?

(Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

___ mg

Answer :

To solve this problem, we need to determine the appropriate dosage of vancomycin for a patient based on their weight and the prescribed dosage schedule. Let's go through the steps:

1. Convert the patient's weight from pounds to kilograms:
- The patient weighs 198 pounds.
- To convert pounds to kilograms, we use the conversion factor 1 pound ≈ 2.20462 kilograms.
- Calculation: [tex]\( 198 \, \text{lb} \div 2.20462 \approx 89.81 \, \text{kg} \)[/tex].

2. Calculate the total daily dosage:
- The prescribed dosage is 15 mg of vancomycin per kilogram of body weight per day.
- Calculation: [tex]\( 15 \, \text{mg/kg/day} \times 89.81 \, \text{kg} \approx 1347.17 \, \text{mg/day} \)[/tex].

3. Determine the dosage per administration:
- The total daily dosage is to be divided equally into two doses (every 12 hours).
- So, we need to divide the daily dosage by 2.
- Calculation: [tex]\( 1347.17 \, \text{mg/day} \div 2 \approx 673.59 \, \text{mg/dose} \)[/tex].

4. Round the dosage to the nearest whole number:
- The calculated dosage per administration is approximately 673.59 mg.
- Rounding this to the nearest whole number gives us 674 mg.

Therefore, the nurse should administer 674 mg of vancomycin with each dose.

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