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Cerebrospinal Fluid (CSF) Protein Electrophoresis

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

This test measures the different types of proteins found in your cerebrospinal fluid (the fluid surrounding your brain and spinal cord). It helps identify abnormalities in protein distribution that may indicate conditions like multiple sclerosis, infections, or other neurological disorders.

Quick summary

["Assists doctors in diagnosing and managing neurological conditions by analyzing protein patterns in CSF."]

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

Key facts at a glance

LOINC
31770-1
Short code
C trach Ag CSF Ql
Synonyms
C trach Ag 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

Electrophoresis separates proteins in your CSF based on size and electrical charge. This process reveals distinct protein bands, each representing different protein types (e.g., albumin, globulins, immunoglobulins). The results help pinpoint specific protein abnormalities.

Why It’s Done

A lumbar puncture (spinal tap) is performed to collect CSF. This test is often used when symptoms like headaches, nerve pain, or neurological issues suggest possible protein-related disorders.

Common Conditions Evaluated

Abnormal protein patterns may signal conditions such as multiple sclerosis, Guillain-Barré syndrome, infections (e.g., meningitis), or inflammatory diseases affecting the central nervous system.

Sample Collection Process

A small amount of CSF is collected via a needle inserted into your lower back. The sample is then sent to the lab for electrophoresis, where proteins are separated and analyzed.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical significance: Elevated or altered protein patterns in CSF can indicate immune system dysfunction, inflammation, or demyelination in the nervous system. For example, high immunoglobulin levels may suggest autoimmune diseases, while abnormal globulin bands could point to infections or tumors.

Short name

CSF Protein Profile

Frequently asked questions

How long does it take to get results from this test?
Results are typically available within 24 to 48 hours, depending on lab processing times. Your healthcare provider will discuss the findings with you during follow-up.
What does a normal result mean?
A normal result shows balanced protein distribution with typical levels of albumin and globulins. However, individual results depend on your health history and symptoms. Your doctor will interpret results in context with your medical condition.
Can I eat or drink anything before this test?
No special preparation is needed. You may eat and drink normally, but avoid caffeine or alcohol before the procedure to minimize discomfort during the lumbar puncture.
  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