A nurse is caring for a client admitted with meningitis. The student nurse asks, "I know that the client has a lot of edemas in the brain, but what causes it?" Which of the following responses from the nurse best answers the student's question?
"Cerebral edema is caused by osmotic cerebral edema."
"Cerebral edema is caused by whole body inflammation which affects the brain the most."
"Cerebral edema is caused by the by-products of the pathogen that causes the meningitis."
"Cerebral edema is caused by cerebrospinal fluid flowing from the intraventricular space to the interstitial area of the brain."
The Correct Answer is C
A. Osmotic edema refers to fluid shifts due to changes in osmotic gradients (as seen in conditions like hyponatremia), not the inflammatory process of meningitis.
B. While inflammation is a key part of the body's response in meningitis, the edema is not a result of generalized whole-body inflammation. The edema is more directly linked to local inflammatory reactions in the brain triggered by the pathogen’s by-products.
C. Bacterial cell walls, endotoxins, and other components released by the bacteria directly stimulate inflammation, causing the breakdown of the BBB and allowing fluid and inflammatory cells to leak into the brain tissue.
D. This description is more aligned with the pathophysiology of conditions like hydrocephalus rather than meningitis. In meningitis, cerebral edema is primarily due to the inflammatory response, not abnormal CSF flow.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["B","C","D","E"]
Explanation
Choice A Reason:
Obtaining a hospital bed and keeping all four siderails up, may not be the best choice. While a hospital bed with siderails may be appropriate for some individuals with Parkinson's disease who are at high risk of falls, keeping all four siderails up continuously can potentially restrict mobility and independence. It's important to balance safety with the client's comfort and ability to move independently.
Choice B Reason:
Removing all throw rugs from the home is correct. Throw rugs can be tripping hazards, especially for individuals with mobility issues or balance problems. Removing throw rugs can reduce the risk of trips and falls within the home.
Choice C Reason:
Installing handrails in the bathroom is correct. Installing handrails in the bathroom, especially near the toilet and shower, can provide additional support and stability for individuals with Parkinson's disease when performing daily activities. This can help prevent falls in a potentially slippery environment.
Choice D Reason:
Ensuring adequate lighting along walking spaces is correct. Good lighting is crucial for individuals with Parkinson's disease to see obstacles and hazards clearly. Adequate lighting along walking spaces helps improve visibility and reduces the risk of falls, especially during nighttime or low-light conditions.
Choice E Reason:
Keeping walking areas free of clutter is correct. Clutter and obstacles in walking areas increase the risk of tripping and falling, particularly for individuals with Parkinson's disease who may have difficulty with balance and coordination. Keeping walking areas clear of clutter helps create a safer environment.
Correct Answer is B
Explanation
Choice A Reason:
A client with a decreased potassium level is incorrect. Hypokalemia (decreased potassium level) can cause various neurological symptoms, but it doesn't directly lead to osmotic cerebral edema.
Choice B Reason:
When plasma glucose levels are rapidly lowered, an osmotic gradient develops between the brain and plasma, which can lead to cerebral edema.Brain cells pull water from the plasma, resulting in widespread edema.
Choice C Reason:
While HbA1c is an important marker of diabetes control and may indicate poor long-term management, it does not directly relate to the acute metabolic derangements (e.g., rapid osmotic shifts, severity of acidosis) that predispose to cerebral edema in DKA.
Choice D Reason:
A client with an increased creatinine level is incorrect. Elevated creatinine levels typically indicate kidney dysfunction or dehydration, but they don't directly cause osmotic cerebral edema.
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