A patient weighing 132 lb is prescribed lorazepam 44 mcg/kg IV to be administered 20 minutes before a scheduled procedure.
The medication is available in a 2 mg/mL vial.
How many mL should the nurse administer? Round off to 2 d.p.
(This is a medical math nd does not require options.)
The Correct Answer is ["1.32"]
Step 1 is to convert the patient’s weight from pounds to kilograms. There are approximately 2.2046 pounds in 1 kilogram. So, the patient’s weight in kilograms is 132 lb ÷ 2.2046 = 59.87 kg.
Step 2 is to calculate the total dose of lorazepam the patient should receive. The prescribed dose is 44 mcg/kg. So, the total dose in micrograms is 44 mcg/kg × 59.87 kg = 2634.28 mcg.
Step 3 is to convert the total dose from micrograms to milligrams. There are 1000 micrograms in 1 milligram. So, the total dose in milligrams is 2634.28 mcg ÷ 1000 = 2.63428 mg.
Step 4 is to calculate the volume of lorazepam solution to administer. The concentration of the solution is 2 mg/mL. So, the volume in milliliters is 2.63428 mg ÷ 2 mg/mL = 1.31714 mL. Therefore, the nurse should administer approximately 1.32 mL of the lorazepam solution, rounding to the nearest hundredth as required.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale
Diaphragmatic respirations are normal in infants and do not necessarily indicate acute respiratory distress.
Choice B rationale
A resting respiratory rate of 35 breaths/min is within the normal range for a 4-month-old infant and does not necessarily indicate acute respiratory distress.
Choice C rationale
Bilateral bronchial breath sounds are normal findings and do not necessarily indicate acute respiratory distress.
Choice D rationale
Flaring of the nares, or nostrils, is a sign of respiratory distress in children. It indicates that the child is having to work harder to breathe.
Correct Answer is B
Explanation
Choice A rationale
Keeping the infant home from daycare for the next two days after vaccination is not necessary unless the child is showing signs of serious side effects, which are rare. Most vaccines have mild side effects such as soreness at the injection site or a mild fever, which should not interfere with the child’s daily activities.
Choice B rationale
Applying a cool, damp cloth or a cool pack to the injection site can help reduce redness, soreness, and/or swelling. This is a common practice recommended by healthcare professionals to alleviate discomfort after vaccination.
Choice C rationale
It is not recommended to administer aspirin to children due to the risk of Reye’s syndrome, a rare but serious condition that can affect the liver and brain. Instead, if the child is uncomfortable or has a fever, parents can consult with a healthcare provider about giving a non-aspirin pain reliever.
Choice D rationale
While any level of fever after vaccination should be monitored, it is not always serious and should not cause panic. Fevers are a common side effect of vaccinations and are usually a sign that the body is building protection against the virus or bacteria in the vaccine. However, if a high fever persists or the child shows signs of an allergic reaction, parents should contact a healthcare provider immediately.
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