A nurse is preparing to administer nafcillin 25 mg/kg/day IM divided in equal doses every 12 hr to a school-age child who weighs 83 lb. Available is nafcillin injection 250 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.)
The Correct Answer is ["1.9"]
Identify the given information:
Dose of nafcillin: 25 mg/kg/day
Weight of the child: 83 lb
Concentration of nafcillin injection: 250 mg/mL
Convert the child's weight from pounds to kilograms:
1 lb ≈ 0.453592 kg
Calculate the total daily dose of nafcillin in mg:
Total daily dose = Dose/kg/day x Weight (kg)
Substitute the values:
Total daily dose = 25 mg/kg/day x 83 lb x (0.453592 kg/1 lb)
Total daily dose ≈ 936.82 mg
Calculate the dose per dose (every 12 hours):
Dose per dose = Total daily dose / 2
Substitute the values:
Dose per dose = 936.82 mg / 2
Dose per dose ≈ 468.41 mg
Calculate the volume of nafcillin injection to be administered:
Volume = Dose per dose (mg) / Concentration (mg/mL)
Substitute the values:
Volume = 468.41 mg / 250 mg/mL
Volume ≈ 1.87 mL
Round the answer to the nearest tenth:
Volume ≈ 1.9 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["0.005"]
Explanation
1. Determine the desired dose and the available concentration:
- Desired dose: 0.25 mg
- Available concentration: 50 mg/mL
2. Set up the calculation:
- We need to find out how many mL contain 0.25 mg of digoxin. We can use the following formula:
- (Desired Dose) / (Available Concentration) = Volume to Administer
3. Perform the calculation:
- 0.25 mg / 50 mg/mL = 0.005 mL
4. Round the answer:
- The answer is 0.005 mL.
- Since the question asks to round to the nearest whole number and use a leading zero if it applies, and not use a trailing zero, and since this number is less than 1, we add a leading zero.
- The answer is 0.005mL.
Therefore, the nurse should administer 0.005 mL of digoxin elixir.
Correct Answer is ["3.5"]
Explanation
Identify the given information:
Dose of pantoprazole: 7 mg
Concentration of pantoprazole: 2 mg/mL
Calculate the volume of pantoprazole to be administered:
Volume = Dose (mg) / Concentration (mg/mL)
Substitute the values:
Volume = 7 mg / 2 mg/mL
Calculate the result:
Volume = 3.5 mL
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