A nurse is preparing to administer acyclovir 5 mg/kg via intermittent IV bolus to a client who weighs 138 lb. Available is acyclovir 7 mg/mL of 0.9% sodium chloride solution. How many mL should the nurse administer? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["45"]
Calculation:
Convert the client's weight from pounds (lbs) to kilograms (kg):
Formula: Weight in kg = Weight in lbs / 2.2 lbs/kg
= 138 lbs / 2.2 lbs/kg
≈ 62.73 kg
Calculate the total dose of acyclovir needed in milligrams:
Ordered dose: 5 mg/kg
Client's weight in kg: ≈ 62.73 kg
Formula: Total dose (mg) = Ordered dose (mg/kg) × Client's weight (kg)
= 5 mg/kg × 62.73 kg
≈ 313.65 mg
Determine the concentration of the available acyclovir solution:
Available concentration: 7 mg/mL
Calculate the volume of acyclovir to administer:
Formula: Volume to administer (mL) = Desired dose (mg) / Concentration (mg/mL)
= 313.65 mg / 7 mg/mL
≈ 44.81 mL
Round the answer to the nearest whole number:
44.81 Ml rounded to the nearest whole number is 45 mL.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["1.9"]
Explanation
Calculation:
Convert the client's weight from pounds (lbs) to kilograms (kg):
Formula: Weight in kg = Weight in lbs / 2.2 lbs/kg
= 132 lbs / 2.2 lbs/kg
= 60 kg
Calculate the total daily dose of dexamethasone in milligrams:
Ordered daily dose: 0.5 mg/kg/day
Client's weight in kg: 60 kg
Formula: Total daily dose (mg/day) = Ordered dose (mg/kg/day) × Client's weight (kg)
= 0.5 mg/kg/day × 60 kg
= 30 mg/day
Determine the number of doses per day:
Dosing frequency: every 6 hours
Number of doses per day = 24 hours/day / 6 hours/dose = 4 doses/day
Calculate the dose of dexamethasone to administer per dose:
Formula: Dose per administration (mg/dose) = Total daily dose (mg/day) / Number of doses per day
= 30 mg/day / 4 doses/day
= 7.5 mg/dose
Determine the concentration of the available dexamethasone injection:
Available concentration: 4 mg/mL
Calculate the volume of dexamethasone to administer per dose:
Formula: Volume per dose (mL) = Desired dose per administration (mg/dose) / Concentration (mg/mL)
= 7.5 mg/dose / 4 mg/mL
= 1.875 mL
Round the answer to the nearest tenth:
1.875 mL rounded to the nearest tenth is 1.9 mL.
Correct Answer is ["167"]
Explanation
Calculation:
Determine the total volume to be infused:
Total volume: 250 mL
Determine the total infusion time in hours:
Infusion time: 90 minutes
Conversion: 90 minutes / 60 minutes/hour = 1.5 hours
Calculate the IV pump flow rate in mL/hr:
Formula: Flow rate (mL/hr) = Total volume (mL) / Total time (hours)
= 250 mL / 1.5 hours
≈ 166.67 mL/hr
Round the answer to the nearest whole number:
166.67 mL/hr rounded to the nearest whole number is 167 mL/hr.
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