A nurse is preparing to administer dopamine hydrochloride 4 mcg/kg/min via continuous infusion.
Available is dopamine hydrochloride in a solution of 800 mg in a 250 mL bag.
The client weighs 80 kg. The nurse should set the IV infusion to deliver how many mL/hr? (Round the answer to the nearest whole number.
Use a leading zero if it applies.)
4 mL/hr.
5 mL/hr.
6 mL/hr.
7 mL/hr.
The Correct Answer is C
Step 1: Convert the dopamine hydrochloride dose from mcg to mg. We know that 1 mg = 1000 mcg. So, 4 mcg = 0.004 mg.
Step 2: Calculate the total amount of dopamine hydrochloride the client needs per minute. We know that the client weighs 80 kg and the dose is 0.004 mg/kg/min. So, 0.004 mg/kg/min × 80 kg = 0.32 mg/min.
Step 3: Convert the total amount of dopamine hydrochloride the client needs per minute to an hourly rate. We know that 1 hour = 60 minutes. So, 0.32 mg/min × 60 min/hr = 19.2 mg/hr.
Step 4: Calculate the volume of the solution that contains 19.2 mg of dopamine hydrochloride. We know that the solution contains 800 mg in 250 mL. So, (19.2 mg ÷ 800 mg) × 250 mL = 6 mL.
Therefore, the nurse should set the IV infusion to deliver 6 mL/hr (rounded to the nearest whole number).
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale:
Sitting in high-Fowler's position during the feeding is actually a preventive measure against aspiration. High-Fowler's position, which involves sitting the patient upright at a 90-degree angle, reduces the risk of aspiration by promoting proper digestion and preventing the regurgitation of gastric contents into the lungs.
Choice B rationale:
A history of gastroesophageal reflux disease (GERD) puts the client at risk for aspiration. GERD is a chronic condition in which stomach acid frequently flows back into the esophagus, potentially reaching the throat and lungs, increasing the risk of aspiration during enteral feedings. Aspiration pneumonia, a serious complication, can develop if stomach contents enter the lungs.
Choice C rationale:
A residual of 65 mL 1 hr postprandial indicates that a significant amount of the feeding solution has not been absorbed, raising concerns about delayed gastric emptying. While this situation might require monitoring and adjustments to the feeding regimen, it does not directly increase the risk of aspiration. Aspiration risk is more related to the reflux of stomach contents into the airways.
Choice D rationale:
Receiving a high-osmolarity formula alone does not directly increase the risk of aspiration. High-osmolarity formulas might require careful administration and monitoring to prevent complications, but aspiration risk is more closely associated with the client's underlying conditions, such as GERD.
Correct Answer is C
Explanation
Choice A rationale:
Upper extremity hypotension is not a common finding in coarctation of the aorta. Coarctation of the aorta typically results in narrowing of the aorta, leading to decreased blood flow to the lower part of the body. This can cause weak or absent femoral pulses and lower extremity hypotension, not upper extremity hypotension.
Choice B rationale:
Frequent nosebleeds are not directly associated with coarctation of the aorta. The symptoms of coarctation of the aorta are primarily related to decreased blood flow to the lower extremities, leading to symptoms such as weak femoral pulses, lower extremity hypotension, and leg cramping or pain.
Choice D rationale:
Increased intracranial pressure is not a typical finding in coarctation of the aorta. Coarctation of the aorta affects blood flow to the lower part of the body and does not directly impact intracranial pressure.
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