ARUP's Laboratory Test Directory

Amino Acids Quantitative, Plasma : 0080710
[ image for: Patient History For Biochemical Genetics]
Patient History For Biochemical Genetics
  


Mnemonic: AA QNT

Methodology: Ion Exchange Chromatography
Performed: Mon-Fri
Reported: 2-5 days
Specimen Required: Patient Prep: Adults: Fasting specimen preferred.
Infants and children: Draw specimen prior to feeding or 2-3 hours after a meal.

Collect: Green (sodium or lithium heparin).

Specimen Preparation: Separate plasma from cells ASAP or within 2 hours of collection. Avoid transferring buffy coat material. Transfer 0.5 mL plasma to an ARUP Standard Transport Tube and freeze immediately. (Min: 0.25 mL)

Storage/Transport Temperature: CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.

Remarks: Clinical information is needed for appropriate interpretation. Additional required information includes age, gender, diet (e.g., TPN therapy), drug therapy, and family history. Biochemical Genetics Patient History Form is available on the ARUP Web site at http://www.aruplab.com/patienthistory or by contacting ARUP Client Services.

Unacceptable Conditions: Hemolyzed specimens.

Stability (collection to initiation of testing): After separation from cells: Ambient: Unacceptable; Refrigerated: 24 hours; Frozen: 1 month
Reference Interval:
 
Components 0-11 months 1 year and older Components 0-11 months 1 year and older
Alanine 200-600 µmol/L 240-600 µmol/L Isoleucine 20-130 µmol/L 30-130 µmol/L
Allo-isoleucine None Detected None Detected Leucine 40-230 µmol/L 60-230 µmol/L
Arginine 20-160 µmol/L 40-160 µmol/L Lysine 60-250 µmol/L 80-250 µmol/L
Aspartic Acid 0-40 µmol/L 0-20 µmol/L Methionine 10-60 µmol/L 17-53 µmol/L
Citrulline 6-60 µmol/L 10-60 µmol/L Ornithine 20-135 µmol/L 20-135 µmol/L
Cystine 7-70 µmol/L 7-70 µmol/L Phenylalanine 30-100 µmol/L 30-80 µmol/L
Glutamic Acid 10-190 µmol/L 10-120 µmol/L Proline 110-500 µmol/L 110-500 µmol/L
Glutamine 410-960 µmol/L 410-700 µmol/L Serine 90-250 µmol/L 60-200 µmol/L
Glycine 220-520 µmol/L 140-490 µmol/L Taurine 25-160 µmol/L 25-80 µmol/L
Histidine 40-120 µmol/L 50-130 µmol/L Threonine 50-300 µmol/L 60-220 µmol/L
Homocystine None Detected None Detected Tyrosine 30-140 µmol/L 30-120 µmol/L
Hydroxyproline 6-90 µmol/L 6-50 µmol/L Valine 110-300 µmol/L 140-350 µmol/L

Note: 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, 5) hyperammonemia, 6) lethargy, 7) metabolic acidosis, and 8) testing or following therapy for a specific inborn error of metabolism (PKU, MSUD, tyrosinemia, etc.).  Listing of clinical information is particularly important for appropriate interpretation.
CPT Code(s): 82139
Cross References: Allo-Isoleucine (Amino Acids Quantitative, Plasma), Argininosuccinic Acid (ASA) (Amino Acids Quantitative, Plasma), Branched Chain Amino Acids (Amino Acids Quantitative, Plasma), Cystine (Amino Acids Quantitative, Plasma), Free Homocystine (Amino Acids Quantitative, Plasma), Glycine (Amino Acids Quantitative, Plasma), Quantitative Plasma & Urinary Amino Acids (Amino Acids Quantitative, Plasma)
 
 

 

 

 
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