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When performing a lumbar puncture to test for meningitis, what is the practitioner primarily looking for?
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Introduction to Meningitis
Multiple Choice
Following a lumbar puncture, which finding would be most likely to be present in cases of bacterial meningitis?
A
Elevated glucose concentration in the CSF.
B
Clear/non-cloudy CSF.
C
Elevated pressure upon puncture.
D
Lowered white blood cell count.
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검증된 단계별 안내1
Step 1: Understand the context of the problem, which involves analyzing cerebrospinal fluid (CSF) findings after a lumbar puncture in cases of bacterial meningitis.
Step 2: Recall that bacterial meningitis typically causes inflammation and infection in the meninges, leading to changes in CSF characteristics such as increased pressure, cloudiness, and altered chemical composition.
Step 3: Identify common CSF findings in bacterial meningitis, including elevated opening pressure during lumbar puncture, decreased glucose concentration due to bacterial consumption, increased white blood cell count (especially neutrophils), and cloudy appearance due to pus and cells.
Step 4: Compare the options given: elevated glucose concentration and clear CSF are not typical of bacterial meningitis; lowered white blood cell count is also unlikely since infection usually raises WBC count in CSF.
Step 5: Conclude that elevated pressure upon puncture is a hallmark finding in bacterial meningitis, reflecting increased intracranial pressure from inflammation and infection.
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