|
|
| 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, LC/MS, Urine
Test CodeUAA
CPT Codes
82139, 82570
Includes
1-Methylhistidine, 3-Methylhistidine, Alanine, Alpha-Amino Adipic Acid, Alpha-Amino Butyric Acid, Arginine, Asparagine, Aspartic Acid, Beta Alanine, Beta-Amino Isobutyric Acid, Citrulline, Cystathionine, Cystine, Ethanolamine, Gamma-Amino Butyric Acid, Glutamic Acid, Glutamine, Glycine, Histidine, Homocystine, Hydroxylysine, Hydroxyproline, Isoleucine, Leucine, Lysine, Methionine, Ornithine, Phenylalanine, Proline, Sarcosine, Serine, Taurine, Threonine, Tryptophan, Tyrosine, Valine, Creatinine Random Urine
Preferred Specimen
2 mL random urine collected in a sterile plastic leak-proof container - no preservative
Minimum Volume
0.5 mL
Instructions
Do not use preservatives. Urine with a pH less than 2.0 will be rejected.
Patient age is required for correct interpretation. Provide patient age (required for correct reference range), sex, a brief clinical history, tentative diagnosis, and the therapy over the last three days (drugs, X-ray, infant formula, diet).
Patient age is required for correct interpretation. Provide patient age (required for correct reference range), sex, a brief clinical history, tentative diagnosis, and the therapy over the last three days (drugs, X-ray, infant formula, diet).
Transport Temperature
Frozen
Specimen Stability
Room temperature: Unacceptable
Refrigerated: 7 days
Frozen: 30 days
Refrigerated: 7 days
Frozen: 30 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Received room temperature • pH <2.0
Methodology
Liquid Chromatography/Mass Spectrometry (LC/MS)
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
Set up: Mon, Wed, Fri; Report available: 6-9 days
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 |
