AMINO ACIDS, PLASMA, QUANTITATIVE

Test Documentation
Specimen Required
A fasting sample is recommended for adults, pre-feed specimens are recommended for children. Draw blood in a green sodium or lithium heparin tube. Centrifuge and separate plasma from cells within 2 hours, avoiding buffy coat material. Send 0.5 mL plasma (0.3 mL minimum) frozen in a screw-capped plastic vial. Clinical indication is needed for appropriate interpretation; additional required information includes age, sex, diet (e.g., TPN therapy), drug therapy, and family history.
CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.

Rejection Criteria
Hemolyzed samples.

Methodology
Quantitative Liquid Chromatography/Tandem Mass Spectrometry

Stability
Room Temperature: Unacceptable; Refrigerated: 24 hours; Frozen: 1 month

Reference Range
By report

Performed
Monday-Friday

Turnaround Time5-7 days
Test CodeAMAPQ
CPT-4 Code (s)
82139
LOINC Codes
Homocystine, Plasma   20646-6  
Isoleucine, Plasma   20648-2  
Histidine, Plasma   20645-8  
Glutamine, Plasma   20643-3  
Methionine, Plasma   20651-6  
Proline, Plasma   20655-7  
Alanine, Plasma   20636-7  
Leucine, Plasma   20649-0  
Cystine, Plasma   22672-0  
Amino Acids, Plasma Interpretation   13500-4  
Threonine, Plasma   20658-1  
Aspartic Acid, Plasma   20639-1  
Allo-Isoleucine, Plasma   22670-4  
Glutamic Acid, Plasma   20642-5  
Taurine, Plasma   20657-3  
Glycine, Plasma   20644-1  
Citrulline, Plasma   20640-9  
Phenylalanine, Plasma   14875-9  
Lysine, Plasma   20650-8  
Arginine, Plasma   20637-5  
Ornithine, Plasma   20652-4  
Tyrosine, Plasma   20660-7  
Alpha-amino butyric acid, Plasma   20634-2  
Alpha-aminoadipic acid, Plasma   26600-7  
Argininosuccinic Acid, Plasma   32227-1  
Beta-amino isobutyric Acid, Plasma   26605-6  
Beta-alanine, Plasma   26604-9  
Ethanolamine, Plasma   26608-0  
Gamma-amino butyric acid, Plasma   26609-8  
Sarcosine, Plasma   26613-0  
Trytophan, Plasma   20659-9  
Anserine, Plasma   26599-1  
Asparagine, Plasma   20638-3  
Cystathionine, Plasma   26607-2  
Homocitrulline, Plasma   55876-7  
Hydroxylysine, Plasma   26610-6  

Warde
Medical
Laboratory