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 ["0.7"]
Explanation
Calculation:
Desired dose = 410 mcg
Available concentration = 600 mcg/mL
Calculate the volume to administer:
Volume to administer (mL) = Desired dose (mcg) / Available concentration (mcg/mL)
= 410 mcg / 600 mcg/mL
≈ 0.6833 mL
Round to the nearest tenth:
Rounded volume = 0.7 mL
Correct Answer is ["270"]
Explanation
Calculation:
First, determine the volume of the full strength supplement needed for one feeding if it were given at full strength:
Full strength volume = 360 mL
Calculate the volume of the full strength supplement needed to prepare a 3/4 strength feeding:
Volume of full strength supplement = (Fraction of strength) x (Total volume of feeding)
= (3/4) x 360 mL
= 0.75 x 360 mL
= 270 mL
Therefore, the nurse should use 270 mL of the full strength nutritional supplement to prepare the feeding.
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