AMINO ACIDS, QUANTITATIVE, PLASMA
- AMINO ACIDS, QUANTITATIVE, PLASMA
- Start Date
- Expiration Date
- CPT Codes
- Reference Test
- ATLAS Test Code
Green top (heparin) tube
- Transport Info
Centrifuge and immediately transfer plasma to separate plastic tube
Frozen (Note: Buffy coat layer of sample must be avoided)
CRITICAL FROZEN – Separate samples must be submitted when multiple tests are ordered
- Fasting Required?
- Patient Instructions
Adults: Fasting specimen preferred.
Infants and children: Draw specimen prior to feeding or 2‑3 hours after a meal.
- Reference Range
Quantitative Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
Common indications for amino acid testing include clinical situations such as: acute life-threatening episode, failure to thrive, recurrent vomiting, neurological deterioration, testing or following therapy for a specific inborn error (disorder should be listed).
The measurement of plasma amino acids aids in the confirmation of a clinically suspected inherited disorder of amino acid metabolism. In these disorders, the abnormal amino acid concentration usually exceeds 3-4 times normal and may be greater than 10 times normal. Amino aciduria will also be detected in these patients.Common indications for amino acid testing include clinical situations such as: 1) acute life-threatening episode, 2) failure to thrive, 3) recurrent vomiting, 4) neurological deterioration, and 5) testing or following therapy for a specific inborn error (disorder should be listed). Listing of clinical information is particularly important for appropriate interpretation.