Cerebrospinal fluid (CSF) protein electrophoresis
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.
["This test helps doctors diagnose and monitor conditions affecting your brain and spinal cord by examining protein patterns in your spinal fluid."]
Key facts at a glance
- LOINC
- 11999-0
- Short code
- Fet Cerebral a Middle PI DOP
- Synonyms
- Fet Cerebral a Middle PI DOP
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- us-doppler
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
Why This Test Is Done
Your doctor may order this test if they suspect conditions such as multiple sclerosis, meningitis, brain tumors, or other neurological diseases. It’s often used when symptoms like headaches, numbness, weakness, or vision changes are present, especially if other tests don’t provide a clear answer.
How the Test Works
A small amount of cerebrospinal fluid is collected through a procedure called a lumbar puncture (spinal tap). The fluid is then analyzed using electrophoresis, a technique that separates proteins based on their size and electrical charge. Different protein bands appear on a gel, helping identify any unusual patterns.
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 necessary medications. Inform your doctor about any medications you’re taking, especially blood thinners, as they may affect the procedure.
What to Expect During the Test
The procedure involves inserting a needle into your lower back to collect fluid. You may feel a slight pinch, but the process is usually quick. You’ll lie on your side with your knees bent, and the doctor will guide the needle carefully. Afterward, you may experience mild soreness or a headache, which can be managed with pain relievers.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical Significance
Short name
CSF Protein Electrophoresis
Frequently asked questions
This test helps detect abnormal protein levels or patterns in the CSF, which can signal conditions like multiple sclerosis (where proteins like IgG appear in excess), infections (like bacterial or viral meningitis), or tumors. Changes in protein bands may also indicate inflammatory or degenerative diseases of the nervous system.
How long does it take to get results from this test? Results are usually available within a few days, but the timeline can depend on lab processing and your doctor’s schedule. Follow-up may be needed if results are abnormal.
What are common symptoms that might lead to this test? Symptoms like persistent headaches, numbness, weakness, vision changes, or difficulty walking could prompt this test, especially if other tests don’t explain your concerns.
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