Cerebrospinal Fluid Total Protein by Nephelometry
This test measures the total amount of protein found in your cerebrospinal fluid (the fluid surrounding your brain and spinal cord). Protein levels can help diagnose or monitor conditions affecting the central nervous system.
["Protein in CSF may signal inflammation, infection, or structural issues in the brain or spinal cord."]
Key facts at a glance
- LOINC
- 109734-4
- Short code
- Zic4 Ab Msmt CSF
- Synonyms
- Zic4 Ab Msmt CSF
- 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
Why This Test Is Done
Your doctor may order this test if you have symptoms like headaches, neck stiffness, confusion, or neurological problems. It’s also used to check for conditions like meningitis, multiple sclerosis, or brain tumors. Sometimes, it’s part of a spinal tap procedure to examine fluid directly from your spinal canal.
What to Expect Before the Test
You’ll likely have a spinal tap (lumbar puncture) where a small needle is inserted into your lower back to collect CSF. You may feel pressure or discomfort, but it’s usually brief. Avoid heavy lifting or strenuous activity for 24 hours afterward to prevent complications.
What the Results Mean
Normal results typically show lower protein levels in CSF compared to blood. High levels might indicate inflammation, infections, or blood leaks into the fluid. Low levels could suggest certain genetic disorders or rare conditions. Your doctor will interpret results in the context of your symptoms and medical history.
Common Conditions Monitored
This test helps diagnose or track conditions like meningitis, multiple sclerosis, Guillain-Barré syndrome, or subarachnoid hemorrhages. It may also assess nerve damage, brain tumors, or autoimmune diseases affecting the central nervous system.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Elevated CSF protein levels often point to increased permeability of the blood-brain barrier or active inflammation. For example, high protein in meningitis (from bacterial or viral infections) contrasts with low protein in certain genetic disorders like metachromatic leukodystrophy. Your doctor will correlate results with clinical findings to guide treatment.
Short name
CSF Total Protein
Frequently asked questions
What causes abnormal protein levels in CSF?
How is this test different from blood protein tests?
Can diet or medications affect this test?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
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