The health-care provider prescribes an intermittent infusion of nafcillin (Unipen) 800 mg IV for a pediatric client. The drug is dispensed in a concentration of 250 mg/ml, and the recommended infusion concentration is 40 mg/ml. When adding the prescribed dose to the volume control device, how many ml of IV solution should the nurse add to dilute? (Enter numeric value only. If rounding is required, round to the nearest tenth.)
The Correct Answer is ["16.8"]
To calculate the volume of IV solution needed to dilute the nafcillin, we'll follow these steps:
Step 1: Calculate the total volume of the diluted solution:
Desired Concentration (mg/mL) = Prescribed Dose (mg) / Total Volume (mL)
Rearranging the formula to solve for Total Volume:
Total Volume (mL) = Prescribed Dose (mg) / Desired Concentration (mg/mL)
Total Volume = 800 mg / 40 mg/mL
Total Volume = 20 mL
Step 2: Calculate the volume of nafcillin solution to be added:
Volume of Nafcillin Solution = Prescribed Dose (mg) / Concentration of Nafcillin (mg/mL)
Volume of Nafcillin Solution = 800 mg / 250 mg/mL
Volume of Nafcillin Solution = 3.2 mL
Step 3: Calculate the volume of IV solution needed to dilute:
Volume of IV Solution = Total Volume - Volume of Nafcillin Solution
Volume of IV Solution = 20 mL - 3.2 mL
Volume of IV Solution = 16.8 mL
Therefore, the nurse should add 16.8 mL of IV solution to the volume control device to dilute the nafcillin.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["2"]
Explanation
To determine the number of tablets needed, we can set up a proportion:
x tablets / 60 mg = 1 tablet / 40 mg
Cross-multiplying:
40x = 60
Solving for x:
x = 60 / 40
x = 1.5
Since we cannot administer a fraction of a tablet, we round up to the nearest whole number.
Therefore, the nurse should administer 2 tablets of lisinopril.
Correct Answer is ["4.9"]
Explanation
Step 1: Calculate the concentration of dopamine in the IV solution:
400 mg / 250 mL = 1.6 mg/mL
Step 2: Calculate the infusion rate in mL/minute:
12 mL/hour x (1 hour / 60 minutes) = 0.2 mL/minute
Step 3: Calculate the dopamine infusion rate in mg/minute:
0.2 mL/minute x 1.6 mg/mL = 0.32 mg/minute
Step 4: Convert milligrams to micro-grams:
0.32 mg x (1000 mcg / 1 mg) = 320 mcg/minute
Step 5: Calculate the dopamine infusion rate in mcg/kg/minute:
320 mcg/minute / 65 kg ≈ 4.9 mcg/kg/minute
Therefore, the client is receiving approximately 4.9 mcg/kg/minute of dopamine.
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