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 A
Explanation
Choice A rationale
Hyperventilation leads to a decrease in the amount of carbon dioxide (CO2) in the blood. This causes the pH of the blood to increase, resulting in respiratory alkalosis.
Choice B rationale
Respiratory acidosis is caused by a buildup of CO2 in the blood, typically due to hypoventilation (under-breathing). This is not consistent with the patient’s symptoms of hyperventilation.
Choice C rationale
Metabolic alkalosis is typically caused by a significant loss of acid from the body, such as from prolonged vomiting. This is not consistent with the patient’s symptoms.
Choice D rationale
Metabolic acidosis is typically caused by an increase in acid production within the body or a loss of bicarbonate from the body, such as in diabetic ketoacidosis or kidney disease. This is not consistent with the patient’s symptoms.
Correct Answer is C
Explanation
Choice A rationale
While taking the blood pressure in the other arm might avoid the spasms, it does not address the underlying cause of the spasms. Therefore, this is not the best action for the nurse to take.
Choice B rationale
Using a different sphygmomanometer would not necessarily prevent the spasms from occurring. The spasms are likely not caused by the equipment itself, but rather a physiological issue within the client.
Choice C rationale
The spasms in the client’s hand and fingers could be a sign of hypocalcemia, a condition where there is not enough calcium in the blood. One of the symptoms of hypocalcemia is muscle spasms or tetany. Therefore, reviewing the client’s serum calcium level would be an appropriate action to take.
Choice D rationale
Administering a PRN antianxiety medication would not address the underlying cause of the spasms. While anxiety can cause muscle tension and spasms, there is no indication in the scenario that anxiety is the cause of this client’s symptoms.
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