A nurse is reviewing a new prescription for dexamethasone 0.2 mg/kg/day PO in two divided doses for a child who weighs 66 lb. The amount available is dexamethasone 0.5 mg/5 mL elixir. How many mL should the nurse administer per dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["30"]
To calculate this, first convert the child's weight from pounds to kilograms: 66 lb * (1 kg / 2.2 lb) = 30 kg. Then, calculate the total daily dose of dexamethasone in mg: 0.2 mg/kg/day * 30 kg/day = 6 mg/day.
Since the daily dose is divided into two doses, calculate the dose per administration: 6 mg/day / 2 doses/day = 3 mg/dose.
Finally, divide the dose in mg by the concentration of the dexamethasone elixir to find the volume to administer: 3 mg / (0.5 mg/5 mL) = 30 mL/dose.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A troche is a type of lozenge that is designed to dissolve slowly in the mouth to release medication over time.
The nurse should instruct the client to place the troche in their mouth and allow it to dissolve slowly without chewing or swallowing it.
The client should also avoid eating or drinking anything until the troche has completely dissolved to ensure maximum absorption of the medication.
The other options are incorrect because they do not accurately describe how a troche should be taken.
Option b is incorrect because it does not specify how the troches should be taken, only the timing of the doses.
Option c is incorrect because it instructs the client to keep the troche under the tongue for only 5 minutes before swallowing it, which may not allow enough time for the troche to dissolve completely and release its medication.
Option d is incorrect because it instructs the client to swallow the troche with water, which would prevent the
medication from being absorbed through the mucous membranes in the mouth and may reduce its effectiveness.
Correct Answer is ["11.6"]
Explanation
To calculate this, first convert the child's weight from pounds to kilograms: 64 lb * (1 kg / 2.2 lb) = 29.09 kg. Then, calculate the dose of vancomycin in mg: 20 mg/kg * 29.09 kg = 581.8 mg.
Finally, divide the dose in mg by the concentration of the vancomycin injection to find the volume to administer: 581.8 mg / (50 mg/mL) = 11.636 mL/dose, which rounds to 11.6 mL when rounded to the nearest tenth.
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