A client scheduled for a stress echo-cardiogram is to receive an IV infusion of Dextrose 5% in Water (D,W) with dobutamine (Dobutrex) 0.5 grams/250 ml at a rate of 1,200 mcg/minute. The nurse should program the infusion pump to deliver how many ml/hour? (Enter numeric value only. If rounding is required, round to the nearest whole number.)
The Correct Answer is ["36"]
Calculating the Dobutamine Infusion Rate
Step 1: Convert grams to milligrams:
0.5 grams = 500 mg
Step 2: Calculate the concentration of dobutamine in the IV solution:
500 mg / 250 mL = 2 mg/mL
Step 3: Convert micro-grams to milligrams:
1200 mcg x (1 mg / 1000 mcg) = 1.2 mg
Step 4: Set up a proportion:
We want to find the infusion rate in mL/minute.
We know the desired dose rate (1.2 mg/minute) and the concentration of the medication (2 mg/mL).
Proportion:
x mL/minute / 1.2 mg/minute = 1 mL / 2 mg
Step 5: Cross-multiply and solve for x:
2x = 1.2
x = 0.6 mL/minute
Step 6: Convert mL/minute to mL/hour:
0.6 mL/minute x 60 minutes/hour = 36 mL/hour
Therefore, the nurse should program the infusion pump to deliver 36 mL/hour.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["160"]
Explanation
To prepare a 4-hour solution of Osmolite® 1/2 strength enteral formula at 80 ml/hour, the nurse will need to dilute the full-strength formula with a certain amount of water.
Step 1: Calculate the total volume of the 1/2 strength formula needed for 4 hours:
Total Volume = Infusion Rate (mL/hour) x Infusion Time (hours)
Total Volume = 80 mL/hour x 4 hours
Total Volume = 320 mL
Step 2: Determine the volume of full-strength Osmolite® needed:
Since the desired solution is 1/2 strength, we need to dilute the full-strength formula by half.
Volume of Full-Strength Osmolite® = Total Volume / 2
Volume of Full-Strength Osmolite® = 320 mL / 2
Volume of Full-Strength Osmolite® = 160 mL
Step 3: Calculate the volume of water needed to dilute the full-strength Osmolite®:
Volume of Water = Total Volume - Volume of Full-Strength Osmolite®
Volume of Water = 320 mL - 160 mL
Volume of Water = 160 mL
Therefore, the nurse should dilute the full-strength Osmolite® with 160 mL of water to prepare a 4-hour solution.
Correct Answer is ["2"]
Explanation
To calculate the number of tablets needed, we'll set up a proportion:
x tablets / 1000 mg = 1 tablet / 500 mg
Cross-multiplying:
500x = 1000
Solving for x:
x = 1000 / 500
x = 2
Therefore, the nurse should administer 2 tablets of metformin for each dose.
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