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 ["5.7"]
Explanation
Identify the given information:
Dose of amoxicillin and clavulanate potassium: 40 mg/kg/day
Weight of the toddler: 25 lb
Concentration of amoxicillin and clavulanate potassium suspension: 200 mg/5 mL
Convert the toddler's weight from pounds to kilograms:
1 lb ≈ 0.453592 kg
Calculate the total daily dose of amoxicillin and clavulanate potassium in mg:
Total daily dose = Dose/kg/day x Weight (kg)
Substitute the values:
Total daily dose = 40 mg/kg/day x 25 lb x (0.453592 kg/1 lb)
Calculate the result:
Total daily dose ≈ 453.59 mg
Calculate the dose per dose (every 12 hours):
Dose per dose = Total daily dose / 2
Substitute the values:
Dose per dose = 453.59 mg / 2
Calculate the result:
Dose per dose ≈ 226.8 mg
Calculate the volume of amoxicillin and clavulanate potassium suspension to be administered:
Volume = Dose per dose (mg) / Concentration (mg/mL)
Substitute the values:
Volume = 226.8 mg / (200 mg/5 mL)
Calculate the result:
Volume ≈ 5.67 mL
Round the answer to the nearest tenth:
Volume ≈ 5.7 mL
Correct Answer is ["0.3"]
Explanation
Given:
Desired dose: Penicillin G benzathine 200,000 units IM
Available concentration: Penicillin G benzathine injection 600,000 units/mL
To find:
Volume to administer (in mL)
Step 1: Set up the proportion
We can use the following proportion to solve the problem:
(Desired dose) / (Available concentration) = Volume to administer
Step 2: Substitute the values
Plugging in the given values, we get:
(200,000 units) / (600,000 units/mL) = Volume to administer
Step 3: Simplify
To simplify, we can invert the denominator and multiply:
(200,000 units) * (1 mL / 600,000 units) = Volume to administer
The "units" cancel out, leaving us with:
(200,000 * 1 mL) / 600,000 = Volume to administer
Step 4: Calculate
Performing the multiplication and division, we get:
200,000 mL / 600,000 = Volume to administer
0.33 mL = Volume to administer
Step 5: Round to the nearest whole number
Since the question asks for the volume rounded to the nearest whole number, we round 0.3.
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