A client with neuroleptic malignant syndrome receives a prescription for dantrolene 1.5 mg/kg IV. The client weighs 132 pounds.
The label on the 250 mg vial reads, “Reconstitute with 5 mL sterile water for injection, USP. Reconstitution yields 50 mg/mL.”. How many mL should the nurse administer?
The Correct Answer is ["1.8"]
The client weighs 132 pounds. To convert pounds to kilograms, divide the weight in pounds by
2.2. So, the client’s weight in kilograms is: Step 1: 132 pounds ÷ 2.2 = 60 kg The prescription for dantrolene is 1.5 mg/kg. To find out how many milligrams the client should receive, multiply the client’s weight in kilograms by the dosage in mg/kg: Step 2: 60 kg × 1.5 mg/kg = 90 mg The vial is reconstituted to yield a concentration of 50 mg/mL. To find out how many mL the nurse should administer, divide the total dosage in milligrams by the concentration in mg/mL: Step 3: 90 mg ÷ 50 mg/mL = 1.8 mL So, the nurse should administer 1.8 mL of dantrolene.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice D rationale
Scheduling frequent rest periods can help manage the fatigue and concentration problems reported by the client. These symptoms are common in clients with CKD and elevated BUN and serum creatinine levels.
Choice A rationale
Administering PRN oxygen may not be necessary unless the client is showing signs of respiratory distress or hypoxia. There is no indication of this in the question.
Choice B rationale
Providing high protein snacks is not recommended for clients with CKD. High protein diets can increase the workload on the kidneys and worsen kidney function.
Choice C rationale
Monitoring glucose levels every 4 hours is not directly related to the client’s reported symptoms or the elevated BUN and serum creatinine levels.
Correct Answer is C
Explanation
Choice A rationale
Comparing muscle strength bilaterally is not the most important intervention in this situation. While muscle weakness can be a symptom of hyperkalemia, it is not the most immediate concern. Hyperkalemia can lead to life-threatening cardiac dysrhythmias, which is a more immediate threat to the patient’s life.
Choice B rationale
Observing the color and amount of urine can provide information about the patient’s renal function, which is important in the regulation of potassium. However, this is not the most immediate concern when a patient’s serum potassium level is dangerously high.
Choice C rationale
Determining the apical pulse rate and rhythm is the most important intervention. Hyperkalemia can cause cardiac dysrhythmias, so the nurse should immediately assess the patient’s heart rate and rhythm. The nurse should also place the patient on a cardiac monitor, if not already done, and notify the healthcare provider immediately.
Choice D rationale
Assessing the strength of deep tendon reflexes can provide information about neuromuscular function, which can be affected by hyperkalemia. However, this is not the most immediate concern. The nurse’s priority is to assess and monitor for life-threatening cardiac dysrhythmias.
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