A nurse is preparing to administer tobramycin 2.5 mg/kg/day IM divided in equal doses every 8 hr to a school-age child who weighs 48 lb. Available is tobramycin injection 40 mg/mL. How many mL should the nurse administer per dose? (Round the answer to the nearest hundredth. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["0.45"]
Identify the given information:
Dose of tobramycin: 2.5 mg/kg/day
Weight of the child: 48 lb
Concentration of tobramycin injection: 40 mg/mL
Convert the child's weight from pounds to kilograms:
1 lb ≈ 0.453592 kg
Calculate the total daily dose of tobramycin in mg:
Total daily dose = Dose/kg/day x Weight (kg)
Substitute the values:
Total daily dose = 2.5 mg/kg/day x 48 lb x (0.453592 kg/1 lb)
Total daily dose ≈ 54.43 mg
Calculate the dose per dose (every 8 hours):
Dose per dose = Total daily dose / 3
Substitute the values:
Dose per dose = 54.43 mg / 3
Dose per dose ≈ 18.14 mg
Calculate the volume of tobramycin injection to be administered:
Volume = Dose per dose (mg) / Concentration (mg/mL)
Substitute the values:
Volume = 18.14 mg / 40 mg/mL
Volume ≈ 0.45 mL
Round the answer to the nearest hundredth:
Volume ≈ 0.45 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
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 ["0.019"]
Explanation
Identify the given information:
Dose of haloperidol: 19,000 mcg
Use the conversion factor:
1 g = 1,000,000 mcg
Set up the conversion:
19,000 mcg x (1 g / 1,000,000 mcg)
Calculate the result:
19,000 mcg x (1 g / 1,000,000 mcg) = 0.019 g
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