AMINO ACIDS, QUANTITATIVE, PLASMA

Code
000.0000
Name
AMINO ACIDS, QUANTITATIVE, PLASMA
Category
None
Department
Send-Out
Start Date
Expiration Date
Synonyms
CPT Codes
82139
Site
SBMF
Reference Test
47120
ATLAS Test Code

Specimen Information

Type

Green top (heparin) tube

Volume

0.5 ml

Transport Info

Centrifuge and immediately transfer plasma to separate plastic tube.  Frozen.

CRITICAL FROZEN – Separate samples must be submitted when multiple tests are ordered.

Note: Buffy coat layer of sample must be avoided

Fasting Required?
True
Patient Instructions

Adults: Fasting specimen preferred. Infants and children: Draw specimen prior to feeding or 2‑3 hours after a meal.

Reference Range

See Report

Methodology

Quantitative Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)

Clinical Significance

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.

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