CSF Flashcards
What is the normal pressure range of CSF in emH20?
5-20
This value indicates the normal intracranial pressure in a healthy individual.
What is the normal appearance of CSF?
Normal
Clear and colorless appearance is typical for normal CSF.
What is the normal protein level in CSF in g/L?
0.18-0.45
This range signifies normal protein concentrations in CSF.
What is the normal glucose level in CSF in mmol/L?
2.5-3.5
Glucose levels are typically maintained within this range in healthy individuals.
What is the expected CSF:Serum glucose ratio in normal conditions?
0.6
A ratio greater than 0.6 indicates normal glucose transport from blood to CSF.
What is the normal white cell count (WCC) in CSF?
< 3
This indicates a normal level of white blood cells in the CSF.
What are the characteristics of CSF in bacterial infections?
- Pressure: > 30
- Appearance: Turbid
- Protein: > 1
- Glucose: < 2.2
- CSF:Serum Ratio: < 0.4
- WCC: > 500
- Predominant cells: 90% PMN
These features are indicative of bacterial meningitis.
What are the characteristics of CSF in viral infections?
- Pressure: Normal or mildly increased
- Appearance: Clear
- Protein: < 1
- Glucose: Normal
- CSF:Serum glucose Ratio: > 0.6
- WCC: < 1000
- Predominant cells: lymphocytes
Viral meningitis typically presents with these CSF profile characteristics.
What are the characteristics of CSF in fungal/TB infections?
- Appearance: Fibrin web
- Protein: 0.1-0.5
- CSF:serum Glucose: < 0.4
- WCC: 100-500
- Predominant cells: Monocytes
These findings suggest a fungal or tuberculosis meningitis infection.
Fill in the blank: The normal CSF glucose level is _______.
2.5-3.5
This is the expected glucose concentration in healthy CSF.
True or False: A CSF WCC of < 3 is considered normal.
True
This indicates a normal white cell count in the CSF.
What percentage of PMN is typically seen in bacterial infections?
90% PMN
A high percentage of polymorphonuclear leukocytes (PMN) is characteristic of bacterial meningitis.
What is the significance of the glucose CSF:Serum ratio being ___ in bacterial infections?
< 0.4
This low ratio indicates impaired glucose transport into the CSF, common in bacterial infections.