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
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Related Questions
Correct Answer is ["500"]
Explanation
Step 1: Identify the given information:
Volume of the solution: 125 mL
Infusion time: 15 minutes
Step 2: Convert the infusion time to hours:
15 minutes = 15/60 hours = 0.25 hours
Step 3: Calculate the infusion rate in mL/hr:
Infusion rate = Volume / Time
Step 4: Substitute the values:
Infusion rate = 125 mL / 0.25 hr
Step 5: Calculate the result:
Infusion rate = 500 mL/hr
Correct Answer is ["13"]
Explanation
Identify the given information:
Dose of acetaminophen: 400 mg
Concentration of acetaminophen liquid: 160 mg/5 mL
Calculate the volume of acetaminophen liquid to be administered:
Volume = Dose (mg) / Concentration (mg/mL)
Substitute the values:
Volume = 400 mg / (160 mg/5 mL)
Volume = 12.5 mL
Round the answer to the nearest whole number:
Volume ≈ 13 mL
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