The healthcare provider prescribes hydromorphone 1 mg intravenously (IV) every 3 hours for an older client after hip replacement surgery. The nurse prepares the prescribed dose from an ampule labeled, "Hydromorphone Injection 2 mg/mL." Additional instructions for opiate naive clients recommend diluting the dosage with 3 mL of sterile normal saline (NS) for IV push over 2 to 3 minutes. How many mL is the total volume of diluted medication?
(Enter the numerical value only. If rounding is required, round to the nearest tenth.)
The Correct Answer is ["3.5"]
To calculate the total volume of diluted medication, we need to use the formula:
Total volume (mL) = Drug volume (mL) + Diluent volume (mL)
First, we need to calculate the drug volume by dividing the dose by the concentration. In this case, 1 mg of hydromorphone is equivalent to 0.5 mL of hydromorphone injection.
Plugging in the given values, we get:
Total volume (mL) = 0.5 mL + 3 mL
Simplifying, we get:
Total volume (mL) = 3.5 mL
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 ["0.002"]
Explanation
To calculate the dose rate, we need to use the formula:
Dose rate (mg/min) = Infusion rate (mL/h) x Concentration (mg/mL) / Time (min)
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 / 500 mL.
Plugging in the given values, we get:
Dose rate (mg/min) = 6 mL/h x 100 mg / 500 mL / 60 min
Simplifying, we get:
Dose rate (mg/min) = 0.002 mg/min
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