The healthcare provider (HCP) prescribes lorazepam 50 mcg/kg IM two hours before a scheduled procedure for a client who weighs 74 kg. The medication is available as "Lorazepam 2 mg/mL vial." How many mL should the nurse administer? (Enter numerical value only. If rounding is required, round to the nearest tenth.)
The Correct Answer is ["1.9"]
Calculation:
Calculate the prescribed dose in micrograms:
Dose (mcg) = Prescribed dose (mcg/kg) x Client's weight (kg)
= 50 mcg/kg x 74 kg
= 3700 mcg
Convert the dose from micrograms to milligrams:
Dose (mg) = Dose (mcg) / 1000 mcg/mg
= 3700 mcg / 1000 mcg/mg
= 3.7 mg
Calculate the volume to administer in mL:
Volume to administer (mL) = Desired dose (mg) / Available concentration (mg/mL)
= 3.7 mg / 2 mg/mL
= 1.85 mL
Round to the nearest tenth:
Rounded volume = 1.9 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["15"]
Explanation
Calculation:
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 units per hour:
Dose (units/hour) = Prescribed dose (units/kg/hour) x Client's weight (kg)
= 10 units/kg/hour x 75 kg
= 750 units/hour
Determine the concentration of heparin in the IV solution:
Heparin concentration (units/mL) = Total heparin units / Total volume of solution (mL)
= 25,000 units / 500 mL
= 50 units/mL
Calculate the infusion rate in mL/hour:
Infusion rate (mL/hour) = Desired dose (units/hour) / Heparin concentration (units/mL)
= 750 units/hour / 50 units/mL
= 15 mL/hour
Correct Answer is ["8.3"]
Explanation
Calculation:
Total volume to be infused = 500 mL
Infusion rate = 60 mL/hour
Calculate the total infusion time in hours:
Infusion time (hours) = Total volume (mL) / Infusion rate (mL/hour)
= 500 mL / 60 mL/hour
= 8.333 hours
Round to the nearest tenth:
= 8.3 hours
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