A nurse is preparing to administer cefazolin 835 mg IM to an adolescent. The amount available is 330 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 ["2.5"]
Identify the given information:
Dose of cefazolin: 835 mg
Concentration of cefazolin: 330 mg/mL
Calculate the volume of cefazolin to be administered:
Volume = Dose (mg) / Concentration (mg/mL)
Substitute the values:
Volume = 835 mg / 330 mg/mL
Calculate the result:
Volume ≈ 2.53 mL
Round the answer to the nearest tenth:
Volume ≈ 2.5 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["10"]
Explanation
Identify the given information:
Dose of methylphenidate: 10 mg
Concentration of methylphenidate oral solution: 5 mg/tsp
Calculate the volume of methylphenidate to be administered:
Volume = Dose (mg) / Concentration (mg/tsp)
Substitute the values:
Volume = 10 mg / 5 mg/tsp
Calculate the result:
Volume = 2 tsp
Convert tsp to mL:
1 tsp ≈ 4.929 mL
Calculate the volume in mL:
Volume = 2 tsp x 4.929 mL/tsp
Calculate the result:
Volume ≈ 9.858 mL
Round the answer to the nearest whole number:
Volume ≈ 10 mL
Correct Answer is ["1"]
Explanation
Step-by-Step Solution:
Convert the child's weight from pounds to kilograms.
1 pound is approximately 0.453592 kilograms.
88 pounds = 88 x 0.453592 = 39.916736 kilograms.
Calculate the total dose of morphine.
The prescribed dose is 0.1 mg/kg.
The child weighs 39.916736 kg.
Total dose = 0.1 mg/kg x 39.916736 kg = 3.9916736 mg.
Calculate the volume of morphine injection to administer.
The available morphine injection is 4 mg/mL.
To find the volume, we can set up a proportion:
4 mg / 1 mL = 3.9916736 mg / x mL
Cross-multiplying:
4x = 3.9916736
Solving for x:
x = 3.9916736 / 4 = 0.9979184 mL
Round the answer to the nearest whole number: 1 mL
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