A nurse is preparing to administer morphine 0.1 mg/kg IV bolus every 3 to 4 hr PRN for pain to a school-age child who weighs 51 lb. Available is morphine injection 2 mg/mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["1.2"]
Step 1 is to convert the child’s weight from pounds to kilograms since the dosage of morphine is prescribed in mg/kg. We know that 1 kg is approximately equal to 2.2 lb. So, the child’s weight in kg is:
51 lb ÷ 2.2 = 23.18 kg
Step 2 is to calculate the total amount of morphine the child should receive per dose. The doctor ordered 0.1 mg of morphine per kg of body weight. So, the total amount of morphine per dose is:
0.1 mg/kg × 23.18 kg = 2.318 mg
Step 3 is to calculate the volume of morphine injection to be administered. We know that the available morphine injection has a concentration of 2 mg/mL. So, the volume in mL is:
2.318 mg ÷ (2 mg/mL) = 1.159 mL
Rounding this to the nearest tenth gives 1.2 mL. So, the nurse should administer 1.2 mL of morphine injection per dose.
So, the correct answer is 1.2 mL.
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Naxlex Comprehensive Predictor Exams
Related Questions
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.
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.
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