A nurse is preparing to administer cefotaxime 100 mg/kg /IV bolus divided in equal doses every 8 hr to a toddler who weighs 26.4 lb. Available is cefotaxime injection 300 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 ["1.3"]
Order: Cefotaxime 100 mg/kg IV bolus, divided into equal doses every 8 hours
Toddler Weight: 26.4 lb
Available Solution: Cefotaxime injection 300 mg/mL
Desired Dose: mL per dose
Step 1: Convert Toddler Weight to Kilograms (kg)
1 kg = 2.2 lbs
Toddler Weight in kg: 26.4 lbs / 2.2 lbs/kg = 12 kg
Step 2: Calculate the Total Daily Dose
Ordered Dose: 100 mg/kg
Toddler Weight: 12 kg
Total Daily Dose: 100 mg/kg x 12 kg = 1200 mg
Step 3: Determine the Number of Doses per Day
Doses are given every 8 hours.
Hours in a Day: 24 hours
Number of Doses: 24 hours / 8 hours/dose = 3 doses
Step 4: Calculate the Dose per Administration
Total Daily Dose: 1200 mg
Number of Doses: 3
Dose per Administration: 1200 mg / 3 doses = 400 mg/dose
Step 5: Calculate the Volume to Administer per Dose
Dose per Administration: 400 mg
Concentration: 300 mg/mL
Volume to Administer: 400 mg / 300 mg/mL = 1.333 mL
Step 6: Round to the Nearest Tenth
The calculated volume is 1.333 mL.
Rounded to the nearest tenth: 1.3 mL
Answer: 1.3 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["4"]
Explanation
Identify the Desired Dose and Available Concentration:
Desired Dose: 10 mg of verapamil
Available Concentration: 5 mg/2 mL
Simplify the Available Concentration:
To make the calculation easier, find the concentration per 1 mL: 5 mg / 2 mL = 2.5 mg/mL (This means there are 2.5 mg of verapamil in every 1 mL of solution)
Set up the Calculation:
We need to find the volume (in mL) that contains the desired dose of 10 mg.
We can use the following formula:
Volume (mL) = Desired Dose (mg) / Available Concentration (mg/mL)
Plug in the Values and Calculate:
Volume (mL) = 10 mg / 2.5 mg/mL
Volume (mL) = 4 mL
Round to the Nearest Whole Number (if necessary):
4 mL
Correct Answer is ["38"]
Explanation
Identify the Given Information:
Infusion Rate: 150 mL/hr
Drop Factor: 15 gtt/mL
Convert the Infusion Rate to mL/min:
There are 60 minutes in 1 hour.
Infusion Rate (mL/min) = 150 mL/hr / 60 min/hr
Infusion Rate (mL/min) = 2.5 mL/min
Calculate the Drip Rate (gtt/min):
Drip Rate (gtt/min) = Infusion Rate (mL/min) x Drop Factor (gtt/mL)
Drip Rate (gtt/min) = 2.5 mL/min x 15 gtt/mL
Drip Rate (gtt/min) = 37.5 gtt/min
Round to the Nearest Whole Number:
38 gtt/min
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