Complete Blood Count (CBC)
This test measures beta globulin levels in cerebrospinal fluid using electrophoresis to help diagnose neurological conditions.
{"Measures beta globulin protein in the fluid surrounding the brain and spinal cord","Helps diagnose conditions like multiple sclerosis and nervous system infections","Sample collected via lumbar puncture (spinal tap)","Abnormal levels may indicate immune or neurological disorders","Results are interpreted alongside other clinical findings"}
Key facts at a glance
- LOINC
- 2870-4
- Short code
- CSPBETA
- Synonyms
- B-Globulin CSF Elph-mCnc
- Category
- chemistry
- Sample
- csf
- Container
- Sterile, leak-proof polypropylene collection tubes for CSF; tubes labeled by collection order (Tube 1-4). Use tube designated for protein electrophoresis (typically tube 2 or 3).
- Units
- N/A
- Ref low
- 7
- Ref high
- 15
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- ≥ 0 years
- Method
- electrophoresis
- CPT
- 82985 (for CSF electrophoresis protein fractionation); 82784 (may apply for IgG electrophoresis)
- SNOMED
- 104134005 (Cerebrospinal fluid); 96769003 (Beta globulin measurement)
- Specimen volume
- 1-2 mL of CSF minimum; ideally 3-5 mL for adequate electrophoresis analysis
- Stability
- Room temperature: 1 hour; Refrigerated (2-8°C): 24 hours; Frozen (-20°C or below): 1 month. Avoid repeated freeze-thaw cycles. Samples should be analyzed promptly for accurate protein fractionation.
- Hemolysis max
- 200
- TAT
- 24–72 hours
- Order
- routine
What is this test? A complete blood count (CBC) is a common blood test that measures the different cells in your blood, including red blood cells, white blood cells, and platelets, and helps your doctor evaluate your overall health.
The CSF Beta Globulin test measures the amount of beta globulin proteins in your cerebrospinal fluid (CSF). Cerebrospinal fluid is a clear, protective liquid that surrounds your brain and spinal cord. The test uses a technique called electrophoresis to separate and measure different types of proteins, specifically focusing on beta globulin.
Why do I need this test? Your doctor may order this test as part of a routine checkup, to look into symptoms such as fatigue, weakness, fever, or unusual bruising, or to monitor an ongoing condition or how a treatment is working.
Your doctor may order this test to help diagnose neurological conditions that affect the central nervous system. It is commonly used to evaluate conditions such as multiple sclerosis, meningitis, encephalitis, and other inflammatory or infectious diseases of the nervous system. The test helps doctors understand if your immune system is producing abnormal proteins in response to neurological inflammation or infection.
How is the sample collected? A healthcare professional will draw a small amount of blood from a vein in your arm, usually on the inside of your elbow, using a thin needle, and the sample is then sent to a laboratory for analysis.
The sample is collected through a procedure called lumbar puncture, also known as a spinal tap. During this procedure, you will lie on your side or sit leaning forward. A healthcare provider will clean your lower back and inject a local anesthetic to numb the area. Then, a thin needle is inserted between two vertebrae in your lower spine to collect a small amount of cerebrospinal fluid. The procedure usually takes about 15-30 minutes.
What do the results mean? Results outside the normal range can suggest conditions such as anemia, infection, inflammation, or clotting problems, but many factors can affect your values, so your doctor will interpret them along with your health history.
Results are reported as a ratio or percentage of beta globulin relative to other proteins in the CSF. Elevated beta globulin levels may suggest conditions like multiple sclerosis, chronic inflammatory diseases, or infections of the nervous system. Normal results vary by laboratory, so your doctor will interpret your results in the context of your symptoms and other test findings.
Are there any risks? This test is very safe, but you may have slight pain or bruising at the needle site, and mild bleeding or dizziness can occasionally occur; serious complications are rare.
The main risks of lumbar puncture include headache (which may last for a few days), minor bleeding, or rare risk of infection. Your healthcare provider will discuss these risks with you and take precautions to minimize them. Drinking plenty of fluids and lying flat after the procedure can help reduce the chance of a headache.
Reference range
Beta globulin fraction in CSF typically represents approximately 7-15% of total CSF protein. Reference values vary by laboratory; results reported as percentage of total protein and/or absolute concentration (mg/dL). Generally, CSF beta globulin: 0.4-1.2 mg/dL or 7-15% of total protein fraction.N/A
No special patient preparation required. Inform the ordering physician of any recent lumbar puncture, neurosurgery, or neurological conditions. Maintain sterile technique during CSF collection.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Elevated beta globulin in CSF is commonly associated with multiple sclerosis, where the immune system attacks the protective myelin sheath around nerve fibers. It may also indicate other demyelinating diseases, chronic meningitis, neurosarcoidosis, or certain infections affecting the central nervous system. The test helps differentiate between various neurological conditions by showing patterns of protein elevation. Results are typically interpreted alongside other CSF findings like immunoglobulin G (IgG) index and oligoclonal bands for a comprehensive assessment.
Frequently asked questions
How long does it take to get results?
Do I need to fast before this test?
Will the lumbar puncture be painful?
Can I resume normal activities after the test?
What happens if my results are abnormal?
Sources
- 1
- 2
- 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