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Test Code LAB562 Amino Acids, Quantitative, Urine, Random

Performing Laboratory

St. Louis Children's Hospital

Last Reviewed

June 2024

Lab Dept

Metabolic Genetics

Specimen Requirements

Specimen Type: Urine (random)

Container/Tube  
Random: A clean, plastic urine container(s) with no preservative.
Acceptable: Clean, screw-cap container with no preservative.
Collection Volume: 5.0 mL (minimum of 1.0 mL) of a random collection
Patient Preparation:   See Urine Collection instructions 

Sample Rejection:

Specimens collected with acid as preservative.
Mislabeled or unlabeled specimens.

Barnes-Jewish Hospital Note:

Call Laboratory Medicine resident at digital pager 314-747-1320 for approval before obtaining specimen.

General Information

EPIC order name: Amino Acids, Urine, Random  (EPIC Test # LAB562)
Cerner order name: Amino Acid Ur
CPT Codes: 82139
LOINC Value: NA
Synonyms:  

Interpretive

Reference Range:

Age dependent

See 'Amino Acid Reference Values' 

Critical Values: None established
Limitations: NA

Methodology: Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
Test Classification: This test was developed and its performance characteristics determined by St. Louis Children's Hospital Clinical Laboratory. It has not been cleared or approved by the U.S. Food and Drug Administration.

Additional Information

For SLCH Laboratory use only

Lab Processing instructions: Mix specimen well and aliquot sample into a conical plastic vial. Place original collection container (with any remaining sample) in freezer #1.Give aliquot to Chem COBAS bench and let them know they have Met Genetics specimen that needs to be frozen post analysis.
Processed Volume: 5.0 mL (minimum 1.0 mL) urine

NO SPECIMEN SHOULD BE REJECTED FOR VOLUME! GIVE ALL SPECIMENS TO METABOLIC GENETICS TO DECIDE IF QNS.


Analyte Stability: Creatinine performed on receipt, Entire collection then frozen.
 
NOTES: Give specimen to chemistry bench to run Creat prior to freezing.

If specimen needs to be shared with UA bench make sure they are aware that specimen is shared and original container needs to be placed in MetGen basket in freezer.

Logistics

Day(s) Test Set Up: Monday-Friday
Cut-off time: 0430
Turnaround Time: 5 days
Lab Testing Section: Metabolic Genetics

Barnes-Jewish Hospital Additional Information:

 

For BJH Laboratory Use Only
Laboratory Processing Instructions:BJH Core Lab will forward to the performing laboratory.