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 A
Explanation
Choice A Reason:
The client has no sensation or movement below the level of the injury is correct. This is a characteristic finding of a complete spinal cord injury, where there is total loss of sensory and motor function below the level of the injury. This pattern is often seen in injuries involving the cervical spinal cord, such as at the level of C7.
Choice B Reason:
The client has some movement but no sensation below the level of the injury is incorrect. This finding would be more indicative of an incomplete spinal cord injury, where there is partial preservation of sensory or motor function below the level of the injury. However, with a transection of the spinal cord at C7, it is less likely for the client to have retained movement below the level of injury.
Choice C Reason:
The client has some movement and also some sensation below the level of the injury is incorrect. This finding is not typically associated with a spinal cord injury at the level of C7. With a transection of the spinal cord at this level, there is typically complete loss of sensory and motor function below the level of the injury.
Choice D Reason:
The client has some sensation but no movement below the level of the injury is incorrect. This finding is more consistent with an incomplete spinal cord injury, where there may be partial preservation of sensory function but no motor function below the level of the injury. However, with a transection of the spinal cord at C7, it is less likely for the client to have retained sensation below the level of injury.
Correct Answer is C
Explanation
Choice A Reason:
Paralytic ileus is incorrect. Paralytic ileus is a condition characterized by obstruction of the intestines due to paralysis of the intestinal muscles, resulting in symptoms such as abdominal pain, bloating, and constipation. Paralytic ileus is not typically associated with cauda equina syndrome, which primarily affects the nerves in the lower back and lower extremities.
Choice B Reason:
Blood pressure 80/48 mm Hg is incorrect. While cauda equina syndrome can cause neurological symptoms such as lower extremity weakness, numbness, and bowel or bladder dysfunction, it is not typically associated with alterations in blood pressure. Blood pressure changes may occur in response to pain or other systemic factors, but they are not specific to cauda equina syndrome.
Choice C Reason:
Weakness in one or both legs is correct. Yes, weakness in one or both legs is a characteristic finding of cauda equina syndrome. Compression of the nerve roots in the lower spinal cord can lead to motor deficits, including weakness, difficulty walking, and loss of reflexes in the lower extremities.
Choice D Reason:
Potassium 3.2 mEq/L is incorrect. Serum potassium levels are not typically associated with cauda equina syndrome. Abnormal potassium levels may be indicative of electrolyte imbalances, which can occur in various medical conditions but are not specific to cauda equina syndrome.

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