Balaninebaibgabapattcsfimp
This test measures three amino acid-related substances in the fluid surrounding your brain and spinal cord to help evaluate neurological function.
{"Measures beta-alanine, beta-aminoisobutyrate, and GABA in cerebrospinal fluid","Helps diagnose neurological and metabolic disorders","Performed using a lumbar puncture (spinal tap) sample","Results help doctors understand how your nervous system is functioning","Abnormal patterns may indicate metabolic or neurological conditions"}
Key facts at a glance
- LOINC
- 79642-5
- Short code
- CSFAAINT
- Synonyms
- B-Alanine + B-AIB + GABA patt CSF-Imp
- Category
- chemistry
- Sample
- csf
- Container
- Sterile CSF collection tube (polypropylene); freeze immediately at -20°C; transport on dry ice for referral laboratories
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 0–99 years
- Method
- Interpretation of beta-alanine, beta-aminoisobutyrate, and gamma-aminobutyrate (GABA) patterns in cerebrospinal fluid using amino acid analysis by ion exchange chromatography or tandem mass spectrometry (MS/MS)
- CPT
- 82139
- SNOMED
- 252307004
- Specimen volume
- 1-2 mL cerebrospinal fluid (minimum 0.5 mL)
- Stability
- Ambient: 1 hour; Refrigerated (2-8°C): 24 hours; Frozen (-20°C): 30 days; Frozen (-80°C): 6 months
- Hemolysis max
- 200
- TAT
- 72–336 hours
- Order
- routine
What is this test?
This test measures the levels of three substances—beta-alanine, beta-aminoisobutyrate, and gamma-aminobutyrate (GABA)—in your cerebrospinal fluid (CSF). CSF is the clear fluid that surrounds and protects your brain and spinal cord. These substances are related to amino acids and play important roles in how your nervous system works.
Why is it done?
This test helps doctors evaluate patients with suspected neurological or metabolic disorders. It can help diagnose conditions that affect the nervous system, including certain metabolic diseases, seizure disorders, and other neurological conditions. The pattern of these substances can provide clues about what's happening in your nervous system.
How is the sample collected?
The sample is collected through a procedure called a lumbar puncture, also known as a spinal tap. A healthcare provider inserts a thin needle into the lower back to draw a small amount of CSF. The procedure is usually done while you're lying on your side or sitting up. Local anesthetic is used to minimize discomfort.
What do the results mean?
Your doctor will interpret the results by looking at the pattern of all three substances together, not just one alone. Normal or abnormal patterns help guide further testing and treatment. Your healthcare provider will discuss your specific results with you, as reference ranges can vary based on age and other factors.
Reference range
Interpretation provided in narrative report. Patterns of beta-alanine, beta-aminoisobutyrate, and gamma-aminobutyrate are evaluated relative to age-specific reference ranges. Results are reported as a qualitative interpretation (normal, elevated, decreased, or abnormal pattern) along with quantitative values when applicable.N/A
No fasting required prior to lumbar puncture. Patient should remain calm and avoid excessive physical activity prior to CSF collection as stress may influence neurotransmitter levels.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Frequently asked questions
Is the lumbar puncture painful?
How long does it take to get results?
Do I need to fast before this test?
Are there any risks to the lumbar puncture?
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