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The action potential pattern that appears on the oscilloscope screen is caused by rapid ________.
- A. polarity changes
- B. pH changes
- C. breakdown of the membrane structure
- D. all of the above
Correct Answer: A
Rationale: The action potential pattern observed on an oscilloscope is caused by rapid changes in membrane polarity. During an action potential, the membrane potential depolarizes (becomes more positive) as sodium ions rush into the neuron, followed by repolarization (returning to negative) as potassium ions exit. These polarity changes are essential for the propagation of nerve impulses and are a hallmark of neural activity.
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Which assessment finding best supports the diagnosis of dissociative amnesia with fugue? The patient states:
- A. I cannot recall why I'm living in this town.
- B. I feel as if I'm living in a fuzzy dream state.
- C. I feel like different parts of my body are at war.
- D. I feel very anxious and worried about my problems.
Correct Answer: A
Rationale: The correct answer is A because the key feature of dissociative amnesia with fugue is the inability to remember important personal information. In this case, the patient cannot recall why they are living in the current town, indicating a significant gap in memory. Choice B describes a feeling of disorientation, not memory loss. Choice C suggests dissociative identity disorder, not dissociative amnesia. Choice D focuses on anxiety, which is not a primary symptom of dissociative amnesia with fugue.
The client diagnosed with an acute exacerbation of multiple sclerosis is placed on high-dose intravenous injections of corticosteroid medication. Which nursing intervention should be implemented?
- A. Discuss discontinuing the proton pump inhibitor with the HCP.
- B. Hold the medication until after all cultures have been obtained.
- C. Monitor the client's serum blood glucose levels frequently
- D. Provide supplemental dietary sodium with the client's meals.
Correct Answer: C
Rationale: High-dose corticosteroids can cause hyperglycemia, so frequent monitoring of blood glucose levels is essential to prevent complications.
Which treatment modality should a nurse recommend to help a patient diagnosed with somatic symptom disorder cope more effectively?
- A. Flooding
- B. Relaxation
- C. Response prevention
- D. Systematic desensitization
Correct Answer: B
Rationale: The correct answer is B: Relaxation. For a patient with somatic symptom disorder, relaxation techniques can help reduce anxiety and physical symptoms associated with the disorder. Relaxation promotes a sense of calm, reduces stress, and can improve coping skills. Flooding (A) involves exposing a patient to a feared stimulus in a sudden and intense manner, which can exacerbate symptoms in somatic symptom disorder. Response prevention (C) is used in treating obsessive-compulsive disorder, not somatic symptom disorder. Systematic desensitization (D) is a technique used for phobias, not somatic symptom disorder.
What causes an initial incomplete spinal cord injury to result in complete cord damage?
- A. Edematous compression of the cord above the level of the injury
- B. Continued trauma to the cord resulting from damage to stabilizing ligaments
- C. Infarction and necrosis of the cord caused by edema, hemorrhage, and metabolites
- D. Mechanical transection of the cord by sharp vertebral bone fragments after the initial injury
Correct Answer: C
Rationale: Secondary injury due to ischemia and inflammation can lead to complete cord damage.
A patient with paraplegia has developed an irritable bladder with reflex emptying. What will be most helpful for the nurse to teach the patient?
- A. Hygiene care for an indwelling urinary catheter
- B. How to perform intermittent self-catheterization
- C. To empty the bladder with manual pelvic pressure in coordination with reflex voiding patterns
- D. That a urinary diversion, such as an ileal conduit, is the easiest way to handle urinary elimination
Correct Answer: C
Rationale: Manual techniques align with reflex voiding patterns.