A patient who weighs 91 kg receives a prescription for a continuous infusion of dopamine at 3 mcg/kg/min. The solution is labeled, “Dopamine 400 mg in 5% Dextrose injection 250 mL.” How many mL/hour should the nurse program the infusion pump to deliver?
(Enter numeric value only. If rounding is required, round to the nearest tenth.)
The Correct Answer is ["10.2"]
To determine the infusion rate in mL/hour for the dopamine solution:
-
Calculate the total dose per minute:
3 mcg/kg/min×91 kg=273 mcg/min3mcg/kg/min×91kg=273mcg/min. -
Convert mcg/min to mcg/hour:
273 mcg/min×60 min/hour=16,380 mcg/hour273mcg/min×60min/hour=16,380mcg/hour. -
Convert mcg to mg:
16,380 mcg÷1,000=16.38 mg/hour16,380mcg÷1,000=16.38mg/hour. -
Determine the concentration of the solution:
400 mg÷250 mL=1.6 mg/mL400mg÷250mL=1.6mg/mL. -
Calculate the mL/hour required:
16.38 mg/hour÷1.6 mg/mL=10.2375 mL/hour16.38mg/hour÷1.6mg/mL=10.2375mL/hour.
Rounded to the nearest tenth:
10.2 mL/hour.
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Related Questions
Correct Answer is ["2"]
Explanation
To find the answer, we can use the following steps:
- Calculate the volume of loratadine suspension in mL by dividing the dose in mg by the concentration in mg/mL
- Convert the volume in mL to teaspoons by multiplying by 0.2
- Round the result to the nearest whole number
Using these steps, we get:
- (volume in mL) = (10) / (5 / 5) = 10 mL
- (volume in teaspoons) = (10) x (0.2) = 2 teaspoons
- (rounded volume in teaspoons) = 2 teaspoons
Therefore, the nurse should instruct the client to take 2 teaspoons of loratadine suspension.
Correct Answer is ["700"]
Explanation
To find the answer, we can use the following steps:
- Calculate the total volume of normal saline in mL by multiplying the weight in kg by the dosage in mL/kg
- Divide the total volume of normal saline in mL by the number of hours to get the rate in mL/hour
- Round the result to the nearest whole number
Using these steps, we get:
- (total volume in mL) = (30) x (70) = 2100 mL
- (rate in mL/hour) = (2100) / (3) = 700 mL/hour
- (rounded rate in mL/hour) = 700 mL/hour
Therefore, the nurse should program the infusion pump to deliver 700 mL/hour of normal saline.
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