A client who weighs 60 kg receives a prescription for lorazepam 44 mcg/kg IV to be administer 20 minutes before a scheduled procedure. The medication is available in 2 mg/mL vial. How many mg of lorazepam should the nurse administer? (Enter numerical value only. If rounding is required, round to the nearest tenth.)
The Correct Answer is ["2.6"]
Calculate the prescribed dose in micrograms:
Dose (mcg) = Prescribed dose (mcg/kg) x Client's weight (kg)
= 44 mcg/kg x 60 kg
= 2640 mcg
Convert the dose from micrograms to milligrams:
Dose (mg) = Dose (mcg) / 1000 mcg/mg
= 2640 mcg / 1000 mcg/mg
= 2.64 mg
Round to the nearest tenth:
Rounded dose = 2.6 mg
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["1"]
Explanation
Convert the client's weight from pounds to kilograms:
Weight (kg) = Weight (pounds) / 2.2 pounds/kg
= 176 pounds / 2.2 pounds/kg
= 80 kg
Calculate the prescribed dose in milligrams:
Dose (mg) = Prescribed dose (mg/kg) x Client's weight (kg)
= 0.05 mg/kg x 80 kg
= 4 mg
Calculate the volume to administer in mL:
Volume to administer (mL) = Desired dose (mg) / Available concentration (mg/mL)
= 4 mg / 4 mg/mL
= 1 mL
Correct Answer is ["180"]
Explanation
Convert the client's weight from pounds to kilograms:
Weight (kg) = Weight (pounds) / 2.2 pounds/kg
= 165 pounds / 2.2 pounds/kg
= 75 kg
Calculate the prescribed dose in mcg/minute:
Dose (mcg/minute) = Prescribed dose (mcg/kg/min) x Client's weight (kg)
= 2 mcg/kg/min x 75 kg
= 150 mcg/minute
Calculate the total amount of dobutamine prescribed per hour:
Dose per hour (mcg/hour) = Dose (mcg/minute) x 60 minutes/hour
= 150 mcg/minute x 60 minutes/hour
= 9000 mcg/hour
Convert the total amount of dobutamine in the IV solution to micrograms:
Total dobutamine (mcg) = Total dobutamine (mg) x 1000 mcg/mg
= 50 mg x 1000 mcg/mg
= 50000 mcg
Determine the concentration of the dobutamine solution in mcg/mL:
Concentration (mcg/mL) = Total dobutamine (mcg) / Total volume (mL)
= 50000 mcg / 1000 mL
= 50 mcg/mL
Calculate the infusion rate in mL/hour:
Infusion rate (mL/hour) = Desired dose per hour (mcg/hour) / Concentration (mcg/mL)
= 9000 mcg/hour / 50 mcg/mL
= 180 mL/hour
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