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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.)

A.

4 mL/hr.

B.

5 mL/hr.

C.

6 mL/hr.

D.

7 mL/hr.

Answer and Explanation

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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Related Questions

Correct Answer is C

No explanation

Correct Answer is B

Explanation

Choice A rationale:

Moderate variability in the FHR is a reassuring sign of fetal well-being, indicating a responsive fetal autonomic nervous system to normal physiologic stimuli. It is considered a normal finding in active labor, suggesting that the fetus is well-oxygenated and able to cope with contractions.

Choice B rationale:

Prolonged decelerations are concerning patterns on the fetal heart rate (FHR) monitor, indicating potential fetal distress. Prolonged decelerations are defined as lasting more than 2 minutes but less than 10 minutes. These decelerations can be caused by umbilical cord compression, placental insufficiency, or maternal hypotension. Prompt intervention is required, making this choice the correct answer.

Choice C rationale:

Three uterine contractions within 10 minutes, also known as a contraction stress test (CST), is a normal finding. It assesses the fetal response to stress and is used to evaluate the placental function and fetal well-being.

Choice D rationale:

A baseline FHR of 115/min is within the normal range (110-160 beats per minute) for a term fetus. It indicates a stable fetal heart rate, and there is no immediate need for intervention.

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