Neurochemical profile of cerebrospinal fluid (CSF) – qualitative screening
This test measures key substances in your cerebrospinal fluid (the fluid surrounding your brain and spinal cord) to help identify potential neurological conditions. It’s often used as an initial screening tool.
["A simple CSF check to spot early signs of neurological issues."]
Key facts at a glance
- LOINC
- 31531-7
- Short code
- Neuronal Ab CSF Ql
- Synonyms
- Neuronal Ab CSF Ql
- Category
- chemistry
- Sample
- csf
- Container
- Sterile tube
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Specimen volume
- 1-2 mL
- Stability
- Immediate analysis required, Refrigerated: 1h
- Hemolysis max
- 200
- TAT
- 4–24 hours
- Order
- routine
What This Test Measures
Your CSF sample is analyzed for a range of neurochemical markers, which may include proteins, amino acids, or other substances that can indicate inflammation, infection, bleeding, or metabolic issues in the brain or spinal cord. The results are qualitative, meaning they’re described as present or absent rather than providing exact measurements.
Why It’s Done
Doctors may order this test if you have symptoms like headaches, neck stiffness, vision changes, or neurological problems that suggest conditions like meningitis, multiple sclerosis, brain tumors, or other disorders affecting the central nervous system.
Sample Collection and Process
A small amount of CSF is collected through a procedure called a lumbar puncture (spinal tap), where a needle is gently inserted into your lower back. The fluid is then sent to the lab for analysis. This test doesn’t require fasting or special preparation beyond avoiding certain medications that could interfere with results.
What to Expect After Testing
After the procedure, you may feel mild soreness or discomfort at the injection site. You’ll typically be asked to lie flat for a short time to prevent any potential leakage of CSF. Follow-up care depends on your doctor’s findings, which may include additional tests or monitoring.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical Significance
Short name
CSF Neurochemical Screen (Qualitative)
Frequently asked questions
This test helps identify abnormalities in CSF chemistry that may not be detected by other blood or imaging tests. For example, elevated protein levels could suggest inflammation or a tumor, while abnormal glucose levels might indicate infection or diabetes-related issues in the central nervous system. Results guide further medical evaluation.
What does a positive or abnormal result mean? An abnormal result doesn’t always mean you have a serious condition, but it may signal the need for further testing or a different diagnosis. Your doctor will explain the possible causes and next steps based on your symptoms and test results.
Is this test painful? The procedure itself involves a small needle inserted into your lower back, which may cause mild discomfort. However, most people describe it as similar to a mild pinch. You’ll be given local anesthesia to minimize pain.
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy