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.)
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).
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","F"]
Explanation
Choice A rationale
Stabilizing the cervical spine is one of the first actions that should be taken during the primary survey of a trauma patient. This is to prevent any potential injury to the spinal cord, which could result in permanent paralysis.
Choice B rationale
Checking for a pulse is an important part of the primary survey, but it is not one of the first actions that should be taken. The first priority is to ensure that the airway is patent and the cervical spine is stabilized.
Choice C rationale
Requesting an x-ray is not one of the first actions that should be taken during the primary survey. The first priority is to assess the client’s airway, breathing, and circulation, and to stabilize the cervical spine.
Choice D rationale
Assessing the respiratory rate is an important part of the primary survey, but it is not one of the first actions that should be taken. The first priority is to ensure that the airway is patent and the cervical spine is stabilized.
Choice E rationale
Examining the abdomen is an important part of the secondary survey, which is conducted after the primary survey. The first priority during the primary survey is to assess the client’s airway, breathing, and circulation, and to stabilize the cervical spine.
Choice F rationale
Ensuring that the airway is patent is one of the first actions that should be taken during the primary survey. This is to ensure that the client is able to breathe effectively and receive adequate oxygenation.
Correct Answer is B
Explanation
Choice A rationale
Gastric lavage is a procedure that involves the insertion of a tube into the stomach to remove its contents and is typically used in cases of poisoning or drug overdose. However, it should not be the first action taken. The type of chemical exposure needs to be determined first to guide appropriate treatment.
Choice B rationale
Determining the type of chemical exposure is crucial as it guides the subsequent steps in management. Different chemicals can have different effects on the body and require different treatments.
Choice C rationale
While assessing for altered sensorium is important in a child exposed to chemicals, it is not the first action. The nurse needs to identify the type of chemical the child was exposed to in order to anticipate potential complications and guide treatment.
Choice D rationale
Calling the poison control emergency number is an important step in managing a case of chemical exposure. However, having information about the type of chemical the child was exposed to can make this call more effective.
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