Amino Acids Quantitative by LC-MS/MS, CSF
Also known as: CSFAA QNT
Use
This test aids in the diagnosis of selected neurotransmitter disorders such as glycine encephalopathy and brain serine deficiency. It is a useful tool for evaluating amino acid levels in the cerebrospinal fluid (CSF), which can indicate various neurological conditions.
Special Instructions
Not provided.
Limitations
The test has not been cleared or approved by the U.S. Food and Drug Administration and is intended solely for clinical purposes. Results may be influenced by blood contamination or functional impairment of the blood-brain barrier, and additional tests on plasma amino acids and plasma ammonia might be necessary for accurate interpretation.
New York Approved
Methodology
Mass Spectrometry
Biomarkers
LOINC Codes
- 22657-1 - Alanine CSF-sCnc
- 22656-3 - Arginine CSF-sCnc
- 26603-1 - Asparagine CSF-sCnc
- 22655-5 - Aspartate CSF-sCnc
- 22654-8 - Citrulline CSF-sCnc
- 22653-0 - Cystine CSF-sCnc
- 22641-5 - Glutamine CSF-sCnc
- 22652-2 - Glutamate CSF-sCnc
- 22650-6 - Glycine CSF-sCnc
- 9453-2 - Histidine CSF-sCnc
- 22660-5 - (Hcys)2 CSF-sCnc
- 26596-7 - OH-Proline CSF-sCnc
- 22659-7 - Isoleucine CSF-sCnc
- 9412-8 - Leucine CSF-sCnc
- 22651-4 - Lysine CSF-sCnc
- 22648-0 - Methionine CSF-sCnc
- 22647-2 - Ornithine CSF-sCnc
- 22646-4 - Phe CSF-sCnc
- 22645-6 - Proline CSF-sCnc
- 22644-9 - Serine CSF-sCnc
- 26614-8 - Taurine CSF-sCnc
- 22643-1 - Threonine CSF-sCnc
- 22642-3 - Tyrosine CSF-sCnc
- 22649-8 - Valine CSF-sCnc
- 48767-8 - Annotation comment Imp
- 55875-9 - Homocitrulline CSF-sCnc
- 26595-9 - OH-Lysine CSF-sCnc
- 26598-3 - Sarcosine CSF-sCnc
- 26602-3 - Tryptophan CSF-sCnc
- 26586-8 - A-Aminobutyr CSF-sCnc
- 22658-9 - Alloisoleucine CSF-sCnc
- 26587-6 - AAA CSF-sCnc
- 26588-4 - Anserine CSF-sCnc
- 40838-5 - Argininosuccinate CSF-sCnc
- 26589-2 - B-Alanine CSF-sCnc
- 26590-0 - B-AIB CSF-sCnc
- 26592-6 - Cystathionin CSF-sCnc
- 26593-4 - Ethanolamine CSF-sCnc
- 26594-2 - GABA CSF-sCnc
Result Turnaround Time
2-5 days
Related Documents
For more information, please review the documents below
Specimen
Cerebrospinal Fluid
Volume
0.5 mL
Minimum Volume
0.3 mL
Collection Instructions
Centrifuge CSF to separate and remove cellular material. Freeze supernatant and transport.
Storage Instructions
CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | Unacceptable |
| Refrigerated | 24 hours |
| Frozen | 1 month |
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