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Test Code 1311 Organic Acids, Qualitative, Urine

Performing Laboratory

St. Louis Children's Hospital

Last Reviewed

January 2016

Additional Information

For SLCH Laboratory use only

 

Lab Processing instructions: Mix specimen well and aliquot sample into a 13-mL screw-cap, plastic vial.
 
Processed Volume: 10.0 mL (minimum 6.0 mL) urine
 
Analyte Stability:

Ambient: NA
Refrigerated: NA
Frozen: NA
 
NOTES: Give specimen to chemistry bench to run Creat prior to freezing.

Interpretive

Reference Range: Interpretation report provided
 
Critical Values: NA
Limitations: Patients on MCT (medium chain triglyceride) oil exhibit a pattern consistent with that seen in MCAD deficiency. Any patient showing significant peaks of adipate, sebacate, and suberate should be investigated for MCT oil. Some formulas containing MCT oil are Alimentum, Progestamyl, Progentyl, and Pediasure.
Methodology: Gas Chromatography/Mass Spectrometry (GC/MS)

Specimen Requirements

Specimen Type: Urine (random or timed)


Container/Tube  
Preferred:

Timed: 24 hour urine collection jug
Random: A clean, plastic urine container(s) with no preservative.
 
Acceptable: Clean, screw-cap container with no preservative.
 
Collection Volume: Entire sample collected during a timed period or a minimum of 6.0 mL of a random collection.
 
Patient Preparation: None
 
Sample Rejection:

Specimens collected with acid as preservative.
Mislabeled or unlabeled specimens.
 
Special Instructions: If collecting a timed specimen, refrigerate specimen during collection and note collection start and stop times on collection container.

Barnes-Jewish Hospital Note:
Call Laboratory Medicine resident at digital pager 314-747-1320 for approval before drawing the specimen.

 

24-Hour Collection

Submit an entire 24-hour urine collection in a plain, brown urine container.

Additional Information:

1. Starting and ending times of collection are required.
2. Follow instructions for Urine Collection in Special Instructions.

3. Urine timed measurement is performed at an additional charge per 24-hour collection (CPT Code-81050).

 

Random Collection

See Specimen Required.

Logistics

Day(s) Test Set Up: Monday-Friday
Cut-off time: 06:30 a.m.
Turnaround Time: 1-3 days
Lab Testing Section: Metabolic Genetics

General Information

KIDDOS order name: Organic Acids Urine
Cerner order name: Organic Ac Ur
CPT Codes: 83919
LOINC Value: NA
Synonyms:

Lab Dept

Metabolic Genetics

Barnes-Jewish Hospital Additional Information:
For BJH Laboratory Use Only
Laboratory Processing Instructions:
BJH Chemistry will forward to the performing laboratory.