A client weighing 198 lbs is prescribed Dopamine hydrochloride IV at 2 mcg/kg/minute to promote renal perfusion.

The pharmacy provides a pre-mixed bag of dopamine containing 400 mg in 250 mL dextrose 5% in water (D5W). An IV pump that provides a precision infusion rate to a tenth of a mL is available.

How many mL/hour should the IV pump be set to deliver? (Enter numeric value only. If rounding is required, round to the nearest tenth.)

Answer and Explanation

The Correct Answer is ["6.8"]

Step 1: Convert the client’s weight from lbs to kg. 1 kg is approximately 2.2 lbs. So, 198 lbs ÷

2.2 = 90 kg (rounded to the nearest whole number).

Step 2: Calculate the total mcg of Dopamine needed per minute. The prescription is for 2 mcg/kg/minute. So, 90 kg × 2 mcg/kg/minute = 180 mcg/minute.

Step 3: Convert the total mcg of Dopamine in the bag to mcg/mL. The bag contains 400 mg of Dopamine in 250 mL. 1 mg is equal to 1000 mcg. So, 400 mg × 1000 = 400,000 mcg. Therefore, the concentration is 400,000 mcg ÷ 250 mL = 1600 mcg/mL.

Step 4: Calculate the mL of Dopamine needed per minute. So, 180 mcg/minute ÷ 1600 mcg/mL

= 0.1125 mL/minute.

Step 5: Convert mL/minute to mL/hour. There are 60 minutes in an hour. So, 0.1125 mL/minute × 60 = 6.75 mL/hour. The IV pump should be set to deliver 6.8 mL/hour (rounded to the nearest tenth).

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Correct Answer is A

Explanation

Choice A rationale

Monitoring the patient’s cardiac activity via telemetry is the most important intervention for a patient with acute renal failure (ARF), uncontrolled type 1 diabetes mellitus, and hyperkalemia who is receiving an IV dose of regular insulin. Hyperkalemia can cause cardiac arrhythmias and other cardiac complications. Therefore, continuous cardiac monitoring is crucial to detect any changes in heart rhythm or rate that could indicate worsening hyperkalemia.
Choice B rationale
While assessing glucose via fingerstick every 4 to 6 hours is important for a patient with uncontrolled type 1 diabetes mellitus, it is not the most important intervention in this scenario. The patient’s hyperkalemia and ARF pose more immediate risks.
Choice C rationale
Evaluating hourly urine output for return of normal renal function is an important part of monitoring a patient with ARF34. However, in the context of hyperkalemia and the administration of insulin, cardiac monitoring is more critical.
Choice D rationale
Maintaining venous access with an infusion of normal saline is a standard nursing intervention for most hospitalized patients, but it is not the most important intervention in this scenario.

A. The patient’s currently prescribed medications. B. The increasing confusion of the patient. C. The patient’s healthcare power of attorney. D. The fall from a ladder as the reason for admission.

Correct Answer is B

Explanation

Choice A rationale
While the patient’s currently prescribed medications are important information, they are not the most immediate concern in this situation. The healthcare provider will need this information, but it does not need to be the first piece of information provided.

Choice B rationale
The increasing confusion of the patient is the most immediate concern and should be communicated first. Confusion and disorientation can be signs of a serious condition such as a brain injury, especially following a fall. It is crucial to relay this information to the healthcare provider as soon as possible so that appropriate diagnostic tests can be ordered and treatment can be initiated.
Choice C rationale
The patient’s healthcare power of attorney is important information, especially if the patient’s condition worsens and they are unable to make decisions for themselves. However, this information does not need to be communicated first. The immediate concern is the patient’s medical condition.
Choice D rationale
The fall from a ladder is certainly important information as it provides context for the patient’s current condition. However, it does not need to be the first piece of information provided. The healthcare provider will likely infer that a fall has occurred based on the other information provided (e.g., confusion, potential loss of consciousness).

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Naxlex Comprehensive Predictor Exams

A patient with acute renal failure (ARF) is admitted due to uncontrolled type 1 diabetes mellitus and hyperkalemia. The nurse administers an IV dose of regular insulin per sliding scale. What is the most important intervention for the nurse to include in this patient’s plan of care?

Correct Answer is A

Explanation

Correct Answer is B

Explanation

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