A nurse is preparing to administer cefazolin 40 mg/ke/day IV Golus divided in equal doses every 12 hr to neonate who weighs 5 kg. Available is cefazolin injection 330 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 ["0.3"]
Calculate the Total Daily Dose:
Dose: 40 mg/kg/day
Weight: 5 kg
Total Daily Dose: 40 mg/kg/day x 5 kg = 200 mg/day
Calculate the Dose Per Administration:
The dose is divided equally every 12 hours, meaning twice a day.
Dose Per Administration: 200 mg/day / 2 doses/day = 100 mg/dose
Calculate the Volume to Administer:
Available Concentration: 330 mg/mL
Volume (mL) = Desired Dose (mg) / Available Concentration (mg/mL)
Volume (mL) = 100 mg / 330 mg/mL
Volume (mL) ≈ 0.303 mL
Round to the Nearest Tenth:
0.3 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["60"]
Explanation
Understanding the Problem
Order: Lidocaine 4 mg/min
Available Solution: Lidocaine 1 g in 250 mL of D5W
Desired Rate: mL/hr
Step 1: Convert Grams (g) to Milligrams (mg)
1 g = 1000 mg
Available Lidocaine: 1 g x 1000 mg/g = 1000 mg
Step 2: Determine the Concentration of the Lidocaine Solution
Available Lidocaine: 1000 mg
Solution Volume: 250 mL
Concentration: 1000 mg / 250 mL = 4 mg/mL
Step 3: Calculate the Infusion Rate in mL/min
Ordered Dose: 4 mg/min
Concentration: 4 mg/mL
Infusion Rate: 4 mg/min / 4 mg/mL = 1 mL/min
Step 4: Convert Infusion Rate to mL/hr
Infusion Rate: 1 mL/min
Minutes in an Hour: 60 min
Infusion Rate in mL/hr: 1 mL/min x 60 min/hr = 60 mL/hr
Step 5: Round to the Nearest Whole Number
The calculated rate is 60 mL/hr, which is already a whole number.
Final Answer: 60 mL/hr
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
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