A nurse is teaching a client newly diagnosed with a seizure disorder about phenytoin sodium therapy. What information should the nurse stress regarding the client stopping the drug suddenly? The drug should not be stopped abruptly because:
hypoglycemic event often develops
physical dependency on the drug develops over time.
a heart block is likely to develop.
status epileptic us may develop
The Correct Answer is D
A) Hypoglycemic event often develops:
Phenytoin is an anticonvulsant, and while it can affect glucose metabolism, hypoglycemia is not a typical consequence of abruptly stopping the drug. This is not a primary concern when discontinuing phenytoin therapy. Hypoglycemia is more commonly associated with medications like insulin or sulfonylureas, not anticonvulsants like phenytoin.
B) Physical dependency on the drug develops over time:
Phenytoin does not cause physical dependence in the way that some other substances (e.g., alcohol, opioids) can. While the body can become used to a medication over time, and withdrawal symptoms can occur, the risk of physical dependence is not the main reason why phenytoin should not be stopped suddenly.
C) A heart block is likely to develop:
Phenytoin is known to have effects on cardiac conduction, and it can cause heart rhythm disturbances like bradycardia or a prolonged PR interval, especially with toxicity. However, the risk of a heart block developing due to abrupt discontinuation of phenytoin is not the primary concern.
D) Status epilepticus may develop:
The most serious risk of suddenly stopping phenytoin, or any anticonvulsant, is the potential for status epilepticus. Status epilepticus is a medical emergency where seizures occur continuously without recovery in between, which can be life-threatening. Abruptly discontinuing phenytoin can lead to a rebound increase in seizure activity, which can result in status epilepticus.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A) Determine when the patient last ate and call for spiritual advisor:
While it is important to gather a comprehensive history, including when the patient last ate, and to provide emotional support such as calling a spiritual advisor, these actions are not the priority in this situation. The immediate concern is the patient's physical condition and addressing the potential trauma to the chest and abdominal organs. Bowel sounds in the chest suggest a serious injury, such as a diaphragmatic rupture, which requires immediate surgical intervention.
B) Assess vital signs and immediately notify the trauma surgeon:
Hearing bowel sounds in the chest is a strong indication of a diaphragmatic injury, possibly a rupture, which can lead to the bowel being displaced into the chest cavity. This is a life-threatening emergency that can result in respiratory distress, impaired organ function, and infection. The nurse should assess vital signs to determine if the patient is stable or in shock and then immediately notify the trauma surgeon to facilitate urgent surgical intervention. Immediate surgical repair is necessary to prevent further complications such as respiratory compromise or sepsis.
C) Request an order for a chest x-ray and stop IV fluids:
A chest x-ray may be ordered later to confirm the presence of diaphragmatic injury or other chest trauma, but the priority action is to notify the trauma surgeon immediately. Stopping IV fluids is not appropriate in this situation; the patient likely needs continued fluid resuscitation, especially if they are in shock or have significant blood loss from their traumatic injuries.
D) Medicate the patient's pain and obtain consent for surgery:
Pain management is important for the patient’s comfort, but surgical intervention should not be delayed while obtaining consent. The trauma surgeon should be notified immediately, and surgery should be expedited without waiting for consent. In trauma cases, consent for life-saving procedures may be implied if the patient is unconscious or unable to provide consent due to the urgency of the situation.
Correct Answer is B
Explanation
A) Heart rate of 130 beats per minute
A heart rate of 130 beats per minute is tachycardia, which is often a compensatory response to injury, particularly in cases of trauma, blood loss, or shock. It is common in the initial phase after trauma as the body attempts to compensate for decreased blood volume or oxygen delivery. However, tachycardia alone is not typically fatal in the immediate post-injury period and can often be managed.
B) pH of 7.21 (normal 7.35–7.45)
A pH of 7.21 indicates acidosis, which is life-threatening and typically arises from shock, blood loss, or severe trauma. Acidosis occurs when the body is unable to compensate for lactic acid or other metabolic byproducts that accumulate due to insufficient oxygen delivery to tissues. In the case of a gunshot wound to the abdomen, there is a high risk of internal bleeding, hypoperfusion, and hypoxia, all of which can lead to metabolic acidosis. Severe acidosis can cause organ failure, particularly affecting the heart, kidneys, and brain.
C) Serum potassium 5.7 mEq/L (normal 3.5–5.3)
A serum potassium of 5.7 mEq/L is elevated, but it is moderately high and not typically life-threatening unless it reaches much higher levels (e.g., >6.0 mEq/L), which can cause cardiac arrhythmias. Elevated potassium can occur due to cellular injury (e.g., muscle trauma or rhabdomyolysis), but it would need to be corrected to prevent complications like arrhythmias.
D) Platelet count 200,000 (normal 150,000–450,000)
A platelet count of 200,000 is within the normal range (150,000–450,000) and does not indicate a problem with coagulation. The blood loss and the NG tube hemorrhage mentioned in the scenario suggest that the patient may be at risk for bleeding, but a platelet count in the normal range suggests that the body’s ability to form clots is likely intact.
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