Dopamine hydrochloride IV at 2 mcg/kg/minute is prescribed to promote renal perfusion for a client weighing 198 lbs. The pharmacy sends a pre-mixed bag of dopamine containing 400 mg in 250 mL dextrose 5% in water (DSW). An IV pump is available that provides a precision infusion rate to a tenth of a mL. The nurse should set the IV pump to deliver how many mL/hour? (Enter numeric value only. If rounding is required, round to the nearest tenth.)
The Correct Answer is ["6.8"]
Converting the weight to kg:
Client weight = 198 lbs 1 lb = 0.453592 kg
Client weight in kg = 198 lbs 0.453592 kg/lb = 90.7 kg
Calculating the desired dopamine infusion rate:
Dose = 2 mcg/kg/minute Client weight = 90.7 kg
Desired infusion rate = Dose Client weight = 2 mcg/kg/minute 90.7 kg = 181.4 mcg/minute
Determining the dopamine concentration in the bag:
Dopamine amount = 400 mg Bag volume = 250 mL
Dopamine concentration = Dopamine amount / Bag volume = 400 mg / 250 mL = 1.6 mg/mL
Convert mg/mL to mcg/mL: 1.6 mg/mL 1000 mcg/mg = 1600 mcg/mL
Calculating the rate in mL/minute:
Desired infusion rate = 181.4 mcg/minute Dopamine concentration = 1600 mcg/mL
Rate (mL/minute) = Desired infusion rate (mcg/minute) / Dopamine concentration (mcg/mL)
Rate = 181.4 mcg/minute / 1600 mcg/mL = 0.1134 mL/minute
Converting the rate to mL/hour:
Rate (mL/minute) = 0.1134 mL/minute Conversion factor: 60 minutes/hour
Rate (mL/hour) = 0.1134 mL/minute 60 minutes/hour = 6.8 mL/hour (round to nearest tenth)
Therefore, the nurse should set the IV pump to deliver approximately 6.8 mL/hour.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is {"dropdown-group-1":"A","dropdown-group-2":"B","dropdown-group-3":"B"}
Explanation
A. anaphylaxis
The correct answer is A. Anaphylaxis is a severe, life-threatening allergic reaction that can occur in response to medication administration. The client's symptoms of dizziness, headache, burning feeling on extremities, and redness on face and extremities, along with the sudden onset of symptoms after starting vancomycin infusion, are indicative of a possible anaphylactic reaction.
B. arrhythmias
The correct answer is B. Arrhythmias refer to abnormal heart rhythms, which can be
triggered by various factors including medication reactions. Given the client's history of symptomatic bradycardia and the sudden onset of symptoms after starting vancomycin infusion, arrhythmias such as bradycardia or other rhythm disturbances are a concern.
C. Cardiac arrest
The correct answer is C. Cardiac arrest is the cessation of normal heart function, which can be precipitated by severe arrhythmias or anaphylaxis. The client's symptoms, along with the drop in blood pressure, indicate a potential risk of progressing to cardiac arrest if not promptly treated.
D. Necrosis
Necrosis, or tissue death, is not typically associated with the symptoms described in the scenario. While vancomycin infusion can potentially cause tissue irritation or damage at the
injection site, the symptoms described suggest a systemic reaction rather than localized tissue necrosis.
E. Renal failure
Renal failure is not directly indicated by the symptoms described in the scenario. While vancomycin can be nephrotoxic in some cases, the symptoms of dizziness, headache, and redness are more suggestive of an allergic or cardiovascular reaction.
F. Peripheral edema
Peripheral edema, or swelling in the extremities, is not indicated by the symptoms described in the scenario. The client's symptoms, such as dizziness, headache, and redness, are more
indicative of a systemic reaction rather than localized swelling.
Correct Answer is D
Explanation
A. Improved visual acuity.
Pregabalin does not affect visual acuity. This medication is primarily used to manage neuropathic pain.
B. Granulating tissue in foot ulcer.
While important, this is not directly related to the effectiveness of pregabalin, which is prescribed for neuropathic pain, not wound healing.
C. Full volume of pedal pulses.
This reflects peripheral circulation but is not an indicator of the effectiveness of pregabalin for neuropathic pain.
D. Reduced level of pain.
This is the correct answer because pregabalin is used to treat neuropathic pain associated with diabetic peripheral neuropathy, and a reduction in pain indicates the medication is effective.
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