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.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale
Observing for signs of depression is the most important intervention for the nurse to include in the client’s plan of care. This patient has a history of struggling with weight management, diabetes mellitus, and hypertension, and is now approved for gastroplasty. Weight management surgery can have significant psychological implications, and patients may experience depression or other emotional issues. Identifying signs of depression and providing appropriate support and resources is crucial for the client’s overall well-being and successful outcomes.
Correct Answer is D
Explanation
Choice A rationale
While the client’s healthcare power of attorney is important information, it is not the most critical piece of information to report in this situation. The immediate concern is the client’s change in mental status and potential medical emergency.
Choice B rationale
The nurse should be aware of the client’s currently prescribed medications, but this information does not take precedence over the client’s sudden onset of confusion and agitation. Immediate action is needed to address the client’s altered mental status.
Choice C rationale
While the reason for the client’s admission is important background information, it is not the most urgent information to report in this situation. The priority is addressing the client’s acute change in mental status.
Choice D rationale
Increasing confusion and agitation in a client who recently underwent ORIF of the right femur is a significant change in condition and may indicate a medical emergency such as infection, delirium, or other complications. This information should be provided first to alert the healthcare provider to the client’s immediate needs.
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