Amino Acid Analysis, Plasma
Test code
CPT code(s)*
Test resources
Test summary
Details
Includes
1-Methylhistidine, 3-Methylhistidine, Alanine, Alpha-Aminoadipic Acid, Alpha-Aminobutyric Acid, Arginine, Asparagine, Aspartic Acid, Beta-Alanine, Beta-Aminoisobutyric Acid, Citrulline, Cystathionine, Ethanolamine, Gamma-Aminobutyric Acid, Glutamic Acid, Glutamine, Glycine, Histidine, Homocystine, Hydroxyproline, Isoleucine, Leucine, Lysine, Methionine, Ornithine, Phenylalanine, Proline, Sarcosine, Serine, Taurine, Threonine, Tryptophan, Tyrosine, Valine
Methodology
Chromatography/Mass Spectrometry
Assay category
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.
Specimen requirements | |
|---|---|
| Patient preparation | Collect plasma specimens after an overnight fast (or at least 4 hours after a meal). Non-fasting samples are acceptable for pediatric patients |
| Preferred specimen(s) | 2 mL plasma collected in a sodium heparin (green-top) tube |
| Alternative specimen(s) | Plasma collected in: EDTA (lavender-top) or lithium heparin (green-top) tube |
| Minimum volume | 0.25 mL |
| Collection instructions | Plasma should be separated from cells as soon as possible after collection. Freeze plasma below -20° C. Patient age is required for correct reference range. |
| Transport container | Transport tube |
| Transport temperature | Frozen |
| Specimen stability | Room temperature: Unacceptable Refrigerated: 7 days Frozen: 28 days |
| Reject criteria | Gross hemolysis |
Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.
*The CPT codes provided are based on AMA guidance and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.
This material contains content from LOINC® (http://loinc.org). The LOINC Table, LOINC Table Core are copyright © 1995-2019, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee and is available at no cost under the license at http://loinc.org/license.
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