Understanding Your Laboratory Test: What It Is, Why You Need It, and How the Sample Is Collected
A laboratory test that analyzes protein components in cerebrospinal fluid using electrophoresis to help diagnose neurological conditions.
{"Measures beta-1 globulin protein levels in cerebrospinal fluid","Helps detect infections, inflammation, or bleeding in the nervous system","Sample is collected via lumbar puncture (spinal tap)"}
Key facts at a glance
- LOINC
- 32728-8
- Short code
- B1GCSF
- Synonyms
- Beta1 Glob MFr CSF Elph
- Category
- chemistry
- Sample
- csf
- Container
- Sterile CSF collection tubes; polypropylene tubes preferred to minimize protein adsorption
- Units
- N/A
- Ref low
- 2
- Ref high
- 7
- Critical range
- 7.2 N/A – 7.6 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- electrophoresis
- CPT
- 83916
- SNOMED
- 104931001
- Specimen volume
- 1-2 mL of CSF; minimum 0.5 mL required for electrophoresis analysis
- Stability
- Ambient: 1 hour; Refrigerated (2-8°C): 24 hours; Frozen (-20°C or below): up to 7 days; avoid repeated freeze-thaw cycles
- Hemolysis max
- 200
- TAT
- 24–72 hours
- Order
- routine
What is this test for, and what information can it give my healthcare provider about my health?
This test measures the beta-1 globulin fraction relative to total protein in cerebrospinal fluid (CSF). Cerebrospinal fluid is the clear fluid that surrounds and cushions the brain and spinal cord. The test uses a technique called electrophoresis, which separates different protein types based on their electrical charge, allowing doctors to analyze the specific protein composition.
Why do I need this test, and what can the results tell my doctor about my condition or overall health?
Your doctor may order this test if you have symptoms suggesting a neurological condition, such as headaches, fever, neck stiffness, confusion, or neurological deficits. It helps evaluate for infections (like meningitis or encephalitis), inflammatory conditions, multiple sclerosis, or bleeding in the nervous system. The test can also help distinguish between different types of neurological disorders.
How is the sample for this test collected, and what should I expect during the collection process?
The sample is collected through a procedure called lumbar puncture or spinal tap. A healthcare provider inserts a thin needle between the bones (vertebrae) in your lower back to withdraw cerebrospinal fluid. The procedure usually takes about 15-30 minutes. You may be asked to lie flat for a while afterward to reduce the risk of headache.
Reference range
Beta 1 globulin fraction in CSF: approximately 2.0-7.0% of total CSF protein; typically reported as percentage or ratio relative to total proteinN/A
No fasting required. Lumbar puncture should be performed under sterile conditions by qualified personnel. Inform the ordering physician of any bleeding disorders, anticoagulant use, or allergies to local anesthetics prior to the procedure.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Elevated beta-1 globulin levels in CSF may indicate: infections such as meningitis or encephalitis, inflammatory conditions like multiple sclerosis or Guillain-Barré syndrome, subarachnoid hemorrhage, or certain autoimmune disorders. Decreased levels are less common but may be seen in some conditions. Your doctor will interpret these results alongside your clinical symptoms and other test findings to make an accurate diagnosis.
Frequently asked questions
Is the lumbar puncture procedure painful?
How long does it take to get results?
Are there any risks associated with this test?
Do I need to prepare for the test?
Sources
- 1
- 2
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