Amino Acids, CSF
Abbrev Code: | CAA, CAA1, CAA25 | ||
Order Code: | LAB3012, LAB3013, LAB3014 | Order Name: | Amino Acid Quantitative CSF |
Order Instructions: | If a single amino acid is requested, order CAA1 (LAB3012) and specify amino acid required; otherwise, order CAA (LAB3013). If 2-5 amino acids are requested, order CAA25 (LAB3014) and specify the amino acids required. | ||
Synonyms: | AA; Asparagine; Aspartic Acid; Carnosine; Citrulline; Half-cystine; Cystathionine; Glutamic Acid; Glutamine; Glycine; Histidine; Homocystine; Hydroxylysine; Isoleucine; Leucine; Lysine; Methionine; 1-methylhistidine; 3-methylhistidine; Ornithine; Phenylalanine; Proline; Sarcosine; Serine; Taurine; Threonine; Tyrosine; Valine; Alanine; B-alanine; A-aminoadipic Acid; B-aminoisobutyric Acid; Anserine; Arginine; Argininosuccinic Acid; Hydroxyproline | ||
Methodology: | High performance ion exchange liquid chromatography | ||
CPT Codes: | 82131 x1, 82136 x1, 82139 x1 | ||
Test Includes: | Alanine, B-alanine, A-aminoadipic acid, B-aminoisobutyric acid, anserine, arginine, argininosuccinic acid, asparagine, aspartic acid, carnosine, citrulline, cystine, cystathionine, glutamic acid, glutamine, glycine, histidine, homocystine, hydroxylysine, hydroxyproline, isoleucine, leucine, lysine, methionine, 1-methylhistidine, 3-methylhistidine, ornithine, phenylalanine, proline, sarcosine, serine, taurine, threonine, tyrosine, valine. | ||
Turnaround Time: | Performed Mon-Fri; results are reported the next day. | ||
Special Instructions: | Provide clinical history and specify amino acid(s) desired on request form. |
Collection Instructions
Specimen: | CSF |
Optimal Volume: | 0.5 mL |
Minimum\Peds Volume: | 0.3 mL |
Container: | Sterile tube Alternate Containers: Plastic leakproof container, sterile |
Causes for Rejection: | Sample not separated from cells and frozen within 2 hours of collection. |
Processing and Shipping
Specimen Processing: | Within 2 hours, centrifuge and aliquot 0.5 mL, 0.25 mL minimum. Room temperature or refrigerated samples must arrive at Biochemical Genetics within 2 hours of collection (preferred). Alternately, store specimen in the freezer and ship on ice. |
Shipping Instructions: | Ship on dry ice. |
Stability: | 2 hours at room temperature or refrigerated; 14 days frozen. |
Test Performed at or Referral Lab | UM Special Drug/Biochemical Genetics (Y) (UMMC East Bank) |
Interpretive
Reference Range: |
An interpretation of the report can be requested.
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Use: | To monitor glutamine for hyperammonemia, glycine to diagnose nonketotic hyperglycinemia, or other amino acids in cerebrospinal fluid. |
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