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Cerebrospinal Fluid Total Protein by Nephelometry

Published: August 9, 2026Updated: August 16, 2026

This test measures the total protein content in your cerebrospinal fluid (CSF), which is the fluid surrounding your brain and spinal cord. It helps assess conditions affecting the brain’s protective barrier or blood-brain barrier.

Quick summary

["CSF protein levels can signal inflammation, bleeding, or other neurological issues."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
40666-0
Short code
RUBV Ab CSF Ql LA
Synonyms
RUBV Ab CSF Ql LA
Category
chemistry
Sample
csf
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
la
Specimen volume
1-2 mL
Stability
Immediate analysis required, Refrigerated: 1h
Hemolysis max
200
TAT
4–24 hours
Order
routine

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you have symptoms like headaches, neurological problems, or signs of infection/inflammation in the brain or spinal cord. It’s also used to diagnose conditions such as meningitis, multiple sclerosis, or tumors.

What to Expect Before the Test

No special preparation is needed. You’ll have a small needle inserted into your lumbar spine to collect CSF. The procedure is quick but may cause mild discomfort. Avoid heavy lifting or strenuous activity afterward to prevent headaches.

What the Results Mean

Elevated protein levels in CSF can indicate inflammation, infection, or blood leakage into the spinal fluid. Lower-than-expected levels may suggest certain genetic or metabolic disorders. Results are interpreted by your provider based on your symptoms and medical history.

Common Conditions Affecting Results

High protein levels are often linked to conditions like meningitis, encephalitis, or multiple sclerosis. Low levels may be seen in rare genetic disorders or after certain treatments. Always discuss your results with your doctor.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: CSF Protein Levels

Short name

CSF Total Protein

Frequently asked questions

What causes elevated CSF protein levels?
Elevated CSF protein levels can result from inflammation, infections (e.g., bacterial or viral meningitis), demyelinating diseases (e.g., multiple sclerosis), or blood leaking into the CSF. Certain tumors or autoimmune conditions may also contribute.
How does this test differ from a blood protein test?
This test specifically measures protein in CSF, not blood. Blood protein tests (like albumin or globulin) assess systemic protein levels, while CSF protein reflects local brain/spinal fluid chemistry, making it unique for diagnosing neurological conditions.
Can diet affect this test?
Diet generally does not impact CSF protein levels, as the fluid is collected directly from the spinal canal. However, avoid caffeine or alcohol before the test to minimize discomfort during the procedure.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

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.

Medical Disclaimer

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