A nurse is preparing to administer ceftriaxone 50 mg/kg IM to a toddler who weighs 22 Ib. The amount available is ceftriaxone 350 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 ["1.4"]
Identify the given information:
Dose of ceftriaxone: 50 mg/kg
Weight of the toddler: 22 lb
Concentration of ceftriaxone: 350 mg/mL
Convert the toddler's weight from pounds to kilograms:
1 lb ≈ 0.453592 kg
Calculate the total dose of ceftriaxone in mg:
Total dose = Dose/kg x Weight (kg)
Substitute the values:
Total dose = 50 mg/kg x 22 lb x (0.453592 kg/1 lb)
Total dose ≈ 498.95 mg
Calculate the volume of ceftriaxone to be administered:
Volume = Total dose (mg) / Concentration (mg/mL)
Substitute the values:
Volume = 498.95 mg / 350 mg/mL
Volume ≈ 1.42 mL
Round the answer to the nearest tenth:
Volume ≈ 1.4 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A) Give the client two troches in the morning and two troches in the evening:
While this option describes the correct number of doses, it does not address the critical aspect of how the troche should be administered. The troche must dissolve in the mouth, not be swallowed immediately, and the focus should be on how the medication is used rather than the total number of doses per day. The timing of doses (morning and evening) is correct, but the method of administration needs further clarification.
B) Tell the client to keep the troche under the tongue for 5 min before swallowing it:
Troches should not be kept under the tongue or swallowed after a short duration. The medication is intended to dissolve in the mouth, where it can act locally. Keeping it under the tongue or swallowing it too soon would reduce its efficacy in treating fungal infections of the mouth or throat. Therefore, this instruction is incorrect.
C) Instruct the client to swallow the troche with 240 mL (8 oz) water:
Swallowing the troche with water is not appropriate because it prevents the medication from dissolving properly in the mouth. Nystatin troches are designed to dissolve slowly in the mouth, releasing medication to treat the infection. Swallowing it immediately would bypass the intended mechanism of action. Therefore, this instruction is incorrect.
D) Withhold oral intake until the troche dissolves in the client's mouth:
This is the correct instruction. Nystatin troches need to dissolve slowly in the mouth to ensure the medication can work locally on the fungal infection. The client should not swallow the troche immediately and should wait until it has fully dissolved, which can take several minutes. This allows for the proper therapeutic effect in treating infections of the mouth or throat.
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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