Nitroglycerin 30 mcg/minute is prescribed for a client who is admitted with chest pain. Nitroglycerin 100 mg is dispensed in a solution of 250 mL of D5W. The nurse should program the infusion pump to deliver how many mL/hour?
(Enter numerical value only. If rounding is required, round to the nearest tenth.)
The Correct Answer is ["4.5"]
To calculate the infusion rate, we need to use the formula:
Infusion rate (mL/h) = Dose (mcg/min) x Volume (mL) / Concentration (mcg)
First, we need to calculate the concentration of nitroglycerin in the solution by dividing the total amount by the total volume. In this case, it is 100 mg / 250 mL.
Since 1 mg is equal to 1,000 mcg, we need to multiply the concentration by 1,000 to get the same units as the dose. In this case, it is 100,000 mcg / 250 mL.
Plugging in the given values, we get:
Infusion rate (mL/h) = 30 mcg/min x 250 mL / 100,000 mcg
Simplifying, we get:
Infusion rate (mL/h) = 0.075 mL/min
To convert minutes to hours, we need to multiply by 60. In this case, it is 0.075 mL/min x 60 min.
Simplifying, we get:
Infusion rate (mL/h) = 4.5 mL/h
Rounding to the nearest tenth, we get:
Infusion rate (mL/h) = 4.5 mL/h
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["80"]
Explanation
First, we need to convert the patient’s weight from pounds to kilograms, since the dose is in mcg/kg/min. To do this, we use the metric equivalent that 1 kg = 2.2 lbs. So, we divide 132 by 2.2 and get 60 kg.
Next, we need to calculate the dose of dopamine in mcg/min for this patient. To do this, we multiply the ordered dose (2 mcg/kg/min) by the patient’s weight (60 kg). So, we get 2 x 60 = 120 mcg/min.
Then, we need to convert the dose of dopamine from mcg/min to mg/hour, since the IV bag contains dopamine in mg. To do this, we use the fact that 1 mg = 1000 mcg and 1 hour = 60 minutes. So, we divide 120 by 1000 and multiply by 60. So, we get 120 / 1000 x 60 = 7.2 mg/hour.
Finally, we need to calculate the infusion rate in mL/hour for this IV bag. To do this, we use the ratio of dopamine in mg to D5W in mL, which is 45 mg / 500 mL. So, we set up a proportion as follows:
45/500=7.2/x
To solve for x, we cross-multiply and get 45 x = 3600. Then, we divide both sides by 45 and get x = 80. So, the infusion rate is 80 mL/hour.
Therefore, the nurse should program the infusion pump to deliver 80 mL/hour. (If rounding is required, round to the nearest whole number.)
Correct Answer is ["10"]
Explanation
To calculate the infusion rate, we need to use the formula:
Infusion rate (mL/h) = Volume (mL) / Time (h)
Plugging in the given values, we get:
Infusion rate (mL/h) = 250 mL / 24 h
Simplifying, we get:
Infusion rate (mL/h) = 10.42 mL/h
Rounding to the nearest whole number, we get:
Infusion rate (mL/h) = 10 mL/h
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