A nurse is preparing to administer hydroxyzine 1 mg/kg IM to a school-age child who weighs 67 lb. Available is hydroxyzine injection 25 mg/mL. How many mL should the nurse administer? (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"]
First, convert the child's weight from pounds to kilograms: 67 lb / 2.205 lb/kg = 30.39 kg
Calculate the total dose of hydroxyzine needed: 1 mg/kg * 30.39 kg = 30.39 mg
Calculate the volume of hydroxyzine to administer: 30.39 mg / 25 mg/mL = 1.2156 mL
Round to the nearest tenth: 1.2156 mL rounded to the nearest tenth is 1.2 mL.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["7.5"]
Explanation
Identify the given information:
Volume of fluconazole oral suspension: 1.5 tsp
Use the conversion factor:
1 tsp = 5 mL
Set up the conversion:
1.5 tsp x (5mL / 1 tsp)
Calculate the result:
1.5 tsp x 5mL/tsp = 7.5 mL
Round the answer to the nearest tenth: 7.5 mL
Correct Answer is ["1.1"]
Explanation
Step-by-Step Solution:
Convert the adolescent's weight from pounds to kilograms.
1 pound is = 0.453592 kilograms.
79 pounds = 79 x 0.453592 = 35.793592 kilograms.
Calculate the total dose of dimercaprol.
The prescribed dose is 3 mg/kg.
The adolescent weighs 35.793592 kg.
The total dose = 3 mg/kg x 35.793592 kg = 107.380776 mg.
Calculate the volume of dimercaprol injection to administer.
The available dimercaprol injection is 100 mg/mL.
To find the volume, we can set up a proportion:
100 mg / 1 mL = 107.380776 mg / x mL
Cross-multiplying:
100x = 107.380776
Solving for x:
x = 107.380776 / 100 = 1.07380776 mL
Round the answer to the nearest tenth: 1.1 mL.
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