In a child with bacterial meningitis, the findings of cerebrospinal fluid show one of the following changes?

IGNOU Post B. SC. Nursing entrance -2021

Pediatric Nursing

Easy

Appeared in: IGNOU Post B. SC. Nursing entrance -2021

Explanation

In bacterial meningitis, the cerebrospinal fluid (CSF) analysis characteristically shows increased protein levels and reduced glucose levels.
The reduction in glucose (hypoglycorrhachia) occurs because the bacteria in the CSF metabolize glucose for energy, thereby depleting its concentration.
The increase in protein is due to the inflammatory response to the infection, which increases the permeability of the blood-brain barrier, allowing protein to leak from the blood into the CSF.
The CSF is also typically turbid or cloudy with a high number of neutrophils (a type of white blood cell).

Option B: This option incorrectly states that sugar (glucose) is increased. In bacterial meningitis, glucose is consumed by the bacteria, leading to reduced levels.
Option C: This option incorrectly states that proteins are decreased and sugar is increased. This is the opposite of the findings in bacterial meningitis.
Option D: This option incorrectly states that protein is decreased. While it correctly identifies that sugar might not be high, normal sugar is more typical of viral meningitis, and protein levels are significantly increased, not decreased, in bacterial meningitis.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Interpretation of Cerebrospinal Fluid (CSF) analysis in bacterial meningitis as background academic context rather than a clinical decision trigger.
Bacterial meningitis is a medical emergency. Rapid and accurate interpretation of CSF findings is crucial for initiating immediate antibiotic therapy, which can be life-saving and prevent severe long-term neurological damage like hearing loss, seizures, or cognitive impairment.
Nurses play a vital role in the management of a child with suspected meningitis, including preparing for and assisting with the lumbar puncture, ensuring the specimen is handled correctly and sent to the lab STAT, administering antibiotics promptly, and closely monitoring for complications like increased intracranial pressure and seizures.
What if? If the CSF results showed a lymphocytic predominance, normal glucose, and only slightly elevated protein, the diagnosis would shift towards viral meningitis. The nursing plan would change significantly, focusing on supportive care rather than emergency antibiotics, as viral meningitis is often self-limiting.

How to Approach the Question

First, identify the key condition in the question stem: 'bacterial meningitis' in a 'child'.
Recall the basic pathophysiology of a bacterial infection in the CSF. Bacteria are living organisms that need energy.
Think about what bacteria would consume for energy. They use glucose. Therefore, the glucose level in the CSF will decrease ('reduced sugar').
Next, consider the body's response to infection. An infection causes inflammation. Inflammation makes blood vessels, including the blood-brain barrier, more permeable or 'leaky'.
Proteins are large molecules normally kept out of the CSF. When the barrier becomes leaky, proteins from the blood enter the CSF. Therefore, the protein level will increase ('increased proteins').
Combine these two facts: you are looking for an option that says 'increased proteins' and 'reduced sugar'.

Concept Tested & Keywords

Concept Tested: Interpretation of Cerebrospinal Fluid (CSF) analysis in bacterial meningitis.
Stem keywords: child, bacterial meningitis, cerebrospinal fluid, changes
Lead-in keywords: one of the following changes
Clinical cues: The diagnosis of bacterial meningitis is a key cue, pointing towards a specific pattern of CSF abnormalities.

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E6 Medicine Harrison 22e Part 1 pp. 1161-1163, 1003-1005, 1165-1167