The healthcare provider prescribes a slow continuous infusion of labetalol to be administered at 2mg/minute. Labetalol HCI Injection, USP 200 mg/40 mL is added to 160 mL of 5% Dextrose Injection, USP for a total volume of 200 mL. How many mL/hour should the nurse program the infusion pump?
(Enter numerical value only.)
The Correct Answer is ["6"]
To calculate the infusion rate in mL/hour, we can use the following formula:
Infusion rate (mL/hour) = Dose (mg/minute) x 60 / Concentration (mg/mL) In this case, the dose is 2 mg/minute and the concentration is:
200 mg/40 mL = 5 mg/mL
We can calculate the infusion rate as follows:
2 mg/minute x 60 / 5 mg/mL = 24 mL/hour
However, the total volume of the solution is 200 mL. Therefore, we need to adjust the infusion rate to ensure that the medication is infused over the correct time period. If we divide the total volume by the infusion time, we can calculate the infusion rate required to deliver the medication over that time period:
200 mL / (120 minutes) = 100 mL/hour
So we need to adjust our initial calculation to ensure that we are infusing at a rate of 100 mL/hour. We can do this by using a proportion:
2 mg/minute x 60 / 5 mg/mL = X mL/hour x 1 Solving for X gives us:
X = (2 x 60 x 1) / 5 = 24 mL/hour
So we should program the infusion pump to deliver 6 mL/hour.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["1200"]
Explanation
A child who weighs 66 pounds receives a prescription for amoxicillin 80 mg/kg/day by mouth in divided doses every 12 hours.
Since 1 kg is equal to 2.2 pounds, the child weighs approximately 30 kg (66 pounds ÷ 2.2 pounds/kg = 30 kg).
This means that the child is receiving a total of 2400 mg of amoxicillin per day (80 mg/kg/day × 30 kg = 2400 mg/day).
Since there are 24 hours in a day and the doses are given every 12 hours, the child will receive a total of 2 doses per day (24 hours/day ÷ 12 hours/dose = 2 doses/day).
Therefore, for each dose, the nurse should administer 1200 mg of amoxicillin (2400 mg/day ÷ 2 doses/day = 1200 mg/dose).
Correct Answer is ["8"]
Explanation
The healthcare provider prescribes regular insulin 8 units/hour intravenously (IV).
The IV solution contains 100 units of regular insulin in 100 mL of 0.9% normal saline, so the concentration of insulin in the IV solution is 1 unit/mL (100 units / 100 mL).
Since the healthcare provider prescribes 8 units/hour of insulin, the nurse should program the infusion pump to deliver 8 mL/hour of the IV solution (8 units/hour / 1 unit/
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