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).
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is {"A":{"answers":"A"},"B":{"answers":"A"},"C":{"answers":"A"},"D":{"answers":"B"},"E":{"answers":"B"}}
No explanation
Correct Answer is A
Explanation
Choice A rationale:
Keeping an abduction pillow between the client's legs is a preventive measure to avoid dislocation of the hip prosthesis. This positioning helps maintain the correct alignment of the hip joint, reducing the risk of dislocation. Abduction pillows are commonly used postoperatively after total hip arthroplasty to support proper hip positioning while the patient is in bed.
Choice B rationale:
Elevating the client's affected leg on a pillow when in bed is not recommended after total hip arthroplasty. This position could lead to hip adduction, increasing the risk of prosthesis dislocation. Maintaining abduction (spreading the legs apart) is the key to preventing dislocation, and elevation should be avoided to maintain proper alignment.
Choice C rationale:
Positioning the client's knees slightly higher than the hips when up in a chair is not an appropriate preventive measure for prosthesis dislocation. Proper alignment is crucial, and the client should avoid sitting in low chairs or on low surfaces that could cause the hips to be lower than the knees, potentially leading to dislocation.
Choice D rationale:
Raising the head of the client's bed to a high-Fowler's position is unrelated to preventing prosthesis dislocation. Fowler's position refers to elevating the head of the bed to assist with breathing and facilitate patient comfort. While this position might be suitable for certain respiratory conditions, it has no direct impact on the stability of a hip prosthesis.
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