Amino Acids Quantitative by LC-MS/MS, Plasma
Also known as: AA QNT P
Use
In diagnosing and monitoring aminoacidopathies such as phenylketonuria (PKU) and maple syrup urine disease (MSUD), this test employs quantitative analysis of amino acids in plasma. Disorders of amino acid metabolism can result in developmental delays, neurological issues, and metabolic crises, making early detection and monitoring essential.
Special Instructions
For accurate interpretation, it is important for the clinician to provide clinical information, including age, gender, dietary information, ongoing therapies, and family history via the Biochemical Genetics Patient History Form. This form can be accessed on the ARUP website or by contacting ARUP Client Services.
Limitations
This test is developed and its performance characteristics are determined by ARUP Laboratories. It is not cleared or approved by the US Food and Drug Administration (FDA). The test is conducted in a CLIA certified laboratory.
New York Approved
Methodology
Mass Spectrometry
Biomarkers
LOINC Codes
- 20636-7
- 20637-5
- 20639-1
- 20640-9
- 20643-3
- 20642-5
- 20644-1
- 20645-8
- 20647-4
- 20648-2
- 20649-0
- 20650-8
- 20651-6
- 20652-4
- 14875-9
- 20655-7
- 20656-5
- 20657-3
- 20658-1
- 20660-7
- 20661-5
- 20646-6
- 22670-4
- 13500-4
- 22672-0
- 20634-2
- 26600-7
- 32227-1
- 26605-6
- 26604-9
- 26608-0
- 26609-8
- 26613-0
- 20659-9
- 26599-1
- 20638-3
- 26607-2
- 55876-7
- 26610-6
Result Turnaround Time
2-5 days
Related Documents
For more information, please review the documents below
Specimen
Plasma
Volume
0.5 mL
Minimum Volume
0.25 mL
Container
ARUP Standard Transport Tube
Collection Instructions
Separate plasma from cells ASAP or within 2 hours of collection. Avoid transferring buffy coat material.
Patient Preparation
Adults: Fasting specimen preferred. Infants and children: Draw specimen prior to feeding or 2-3 hours after a meal.
Storage Instructions
Freeze immediately after plasma preparation.
Causes for Rejection
Hemolyzed specimens.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | Unacceptable |
| Refrigerated | 24 hours |
| Frozen | 1 month |