A patient with neuroleptic malignant syndrome has been prescribed dantrolene 1.5 mg/kg IV. The patient 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 ["1.80"]
Step 1 is to convert the patient’s weight from pounds to kilograms since the dosage is prescribed in mg/kg. We know that 1 kg is approximately 2.20462 pounds. So, the patient’s weight in kilograms is 132 pounds ÷ 2.20462 = 59.87 kg.
Step 2 is to calculate the total dosage of dantrolene needed. The prescribed dosage is 1.5 mg/kg. So, the total dosage is 1.5 mg/kg × 59.87 kg = 89.81 mg.
Step 3 is to calculate the volume of reconstituted dantrolene solution needed to provide the total dosage. The reconstituted solution has a concentration of 50 mg/mL. So, the volume needed is 89.81 mg ÷ 50 mg/mL = 1.80 mL.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale
Monitoring leukocytes, neutrophils, and thyroxine is not the most crucial for a patient with end-stage renal disease (ESRD). While these lab values can provide information about the patient’s immune function and thyroid function, they do not directly relate to the patient’s renal function.
Choice B rationale
Monitoring serum potassium, calcium, and phosphorus levels is crucial for a patient with ESRD. These electrolytes are typically excreted by the kidneys, and their levels can become imbalanced in patients with ESRD. Imbalances can lead to serious complications, such as cardiac arrhythmias and bone disease.
Choice C rationale
Monitoring erythrocytes, hemoglobin, and hematocrit is important for a patient with ESRD, as these patients often develop anemia due to decreased erythropoietin production by the kidneys. However, these are not the only lab values that should be monitored in these patients.
Choice D rationale
Monitoring blood pressure, heart rate, and temperature is important for all patients, but these are not specific to patients with ESRD. Patients with ESRD are at risk for electrolyte imbalances, which can affect cardiac function, making monitoring of serum potassium, calcium, and phosphorus levels more crucial.
Correct Answer is A
Explanation
Choice A rationale
Administering oxygen via a face mask is the first intervention the nurse should do. This is because the decrease in fetal heart rate after the last four contractions indicates possible fetal distress, which can be caused by insufficient oxygen. Administering oxygen to the mother can increase the amount of oxygen available to the fetus, potentially alleviating the distress.
Choice B rationale
Applying an internal fetal heart monitor can provide more accurate and continuous data about the fetal heart rate and contractions. However, this is usually not the first intervention because it is invasive and can only be done if the cervix is sufficiently dilated and the membranes have ruptured.
Choice C rationale
Using a vibroacoustic stimulator is a method used to wake a sleeping baby in the womb during a non-stress test. It is not typically used in response to signs of fetal distress during labor.
Choice D rationale
Notifying the healthcare provider is important when there are signs of fetal distress. However, the nurse has interventions, such as administering oxygen, that they can and should do immediately while the healthcare provider is being notified.
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