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Cerebrospinal Fluid Protein by Electrophoresis

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

This test measures the different types of proteins found in your cerebrospinal fluid (CSF), which surrounds your brain and spinal cord. It helps identify abnormalities in protein composition that may signal conditions like multiple sclerosis, infections, or other neurological issues.

Quick summary

["This test helps diagnose and monitor conditions affecting brain and nerve function by analyzing protein patterns in your spinal fluid."]

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

Key facts at a glance

LOINC
110925-5
Short code
WEEV Ab Msmt CSF
Synonyms
WEEV 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 healthcare provider may order this test if you have symptoms like headaches, vision problems, numbness, weakness, or balance issues. It’s also used to check for conditions like multiple sclerosis, meningitis, or other neurological disorders that might affect protein levels in CSF.

How the Test Works

A small amount of CSF is collected through a procedure called a lumbar puncture (spinal tap). The fluid is then analyzed using electrophoresis, a method that separates proteins based on size and charge to identify their presence and proportions.

What to Expect Before the Test

You may need to fast for a few hours before the test, but this isn’t always required. Wear comfortable clothing and bring any medications you’re currently taking. Inform your provider if you have a history of bleeding disorders or recent head injuries.

What to Expect During the Test

The procedure involves inserting a needle into your lower back to collect CSF. You may feel pressure or a slight pinch, but it’s usually quick and painless. You’ll lie on your stomach, and the provider will guide the needle carefully to avoid damage to nerves or blood vessels.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

CSF Protein Electrophoresis

Frequently asked questions

What does a high or low protein level in CSF mean?
High protein levels could signal inflammation, infections, or demyelinating diseases like multiple sclerosis. Low protein levels may suggest conditions affecting fluid balance or nerve damage, but results depend on the specific pattern and other test findings.
How often should I get this test?
Your provider will determine the frequency based on your symptoms, diagnosis, or treatment plan. Some patients need it periodically to monitor disease progression or response to treatment, while others may only need it once.
Can I eat or drink before this test?
You may need to fast for a few hours before the test, but this depends on your provider’s instructions. Always follow their guidance to ensure accurate results.
  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