A continuous intravenous (IV) infusion of morphine at 15 mg/hour for pain control is prescribed for a client with end-stage lung cancer. The medication solution minibag is labeled, "50 mg/250 mL." The nurse should program the infusion pump to deliver how many mL/hour?
(Enter numerical value only.)
The Correct Answer is ["37.5"]
To calculate the infusion rate, we need to use the formula:
Infusion rate (mL/h) = Dose (mg/h) x Volume (mL) / Concentration (mg)
Plugging in the given values, we get:
Infusion rate (mL/h) = 15 mg/h x 250 mL / 50 mg
Simplifying, we get:
Infusion rate (mL/h) = 75 mL / 2 h
Dividing both sides by 2, we get:
Infusion rate (mL/h) = 37.5 mL/h
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["6.88"]
Explanation
To calculate the volume of amrinone solution, we need to use the formula:
Volume (mL) = Dose (mg) x Dilution factor (mL/mg)
The dilution factor is the ratio of the volume of the vial to the amount of amrinone in the vial. In this case, it is 25 mL / 100 mg.
Plugging in the given values, we get:
Volume (mL) = 55 mg x 25 mL / 100 mg
Simplifying, we get:
Volume (mL) = 13.75 mL
To calculate the rate of administration, we need to divide the volume by the time. In this case, it is 2 minutes.
Plugging in the given values, we get:
Rate (mL/min) = 13.75 mL / 2 min
Simplifying, we get:
Rate (mL/min) = 6.875 mL/min
Rounding to the nearest hundredth, we get:
Rate (mL/min) = 6.88 mL/min
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.)
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