A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
Amino Acid Analysis, Plasma
Message*Take to Processing to be spun down and frozen ASAP
Test Code
767
Alias/See Also
LAB811
CPT Codes
82139
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
Preferred Specimen
2 mL plasma collected in a sodium heparin (green-top) tube
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
Minimum Volume
0.25 mL
Other Acceptable Specimens
Plasma collected in: EDTA (lavender-top) or lithium heparin (green-top) tube
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
Refrigerated: 7 days
Frozen: 28 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis
Methodology
Chromatography/Mass Spectrometry
FDA Status
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.
Setup Schedule
Mon-sat
Report Available
4-7 days
Reference Range
See Laboratory Report
Clinical Significance
Amino Acid analysis is necessary for the diagnosis of a variety of inborn errors of metabolism. These include, but are not limited to, phenylketonuria, tyrosinemia, citrullinemia, non-ketotic hyperglycinemia, maple syrup urine disease, and homocystinuria. The assay is also key for the continued monitoring of treatment plans for these disorders and useful for assessing nutritional status of patients. Our methodology is highly accurate at very low levels as well as at elevated levels.
Performing Laboratory
Quest Diagnostics Nichols Institute-San Juan Capistrano, CA |
33608 Ortega Highway |
San Juan Capistrano, CA 92675-2042 |