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 ["3742"]
Explanation
Step 1 is: Convert the child’s weight from pounds to kilograms. 1 pound is approximately 0.453592 kilograms, so 55 lb × 0.453592 kg/lb = 24.9476 kg.
Step 2 is: Calculate the total daily dosage. 150 mg/kg/day × 24.9476 kg = 3742.14 mg/day. Therefore, the nurse should administer approximately 3742 mg each day when rounded to the nearest whole number.
Correct Answer is D
Explanation
Choice A rationale
Replacing paper trash bags with plastic biohazard bags is not typically necessary in a mental health unit unless there is a risk of exposure to blood or other potentially infectious materials. This action would not specifically address the safety needs of a patient with depression following a positive HIV diagnosis16.
Choice B rationale
Removing soft drink cans from the nurse’s desk and patient lounge is not typically necessary for ensuring a safe environment for a patient with depression following a positive HIV diagnosis. This action does not directly address the patient’s mental health needs16.
Choice C rationale
Confiscating the patient’s cellular phone and providing a room telephone is not typically necessary for ensuring a safe environment for a patient with depression following a positive HIV diagnosis. While some facilities may have policies regarding the use of personal electronic devices, this action does not directly address the patient’s mental health needs16.
Choice D rationale
Ensuring that prescribed medications are securely stored in the room is the correct action. This is a standard safety measure in healthcare settings to prevent medication errors and misuse. It is particularly important for patients with depression who may be at risk for self-harm16.
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