Organic Acid Analysis, Urine
Use
Urine organic acid testing is useful in the diagnosis and monitoring of patients with inborn errors of organic acid metabolism, inborn errors of amino acid metabolism, urea cycle defects, and defects of the mitochondrial respiratory chain.
Special Instructions
Not provided.
Limitations
Organic acid analysis may fail to detect certain disorders that are characterized by minimal or intermittent metabolite excretion. If a specific disorder is suspected, consider submitting a repeat specimen. Specimens collected during an acute metabolic crisis may be more informative than specimens collected when the patient is well.
Methodology
Mass Spectrometry
Biomarkers
Methylmalonate (MMA)
Analyte
LOINC Codes
- 49287-6 - Organic Acids Pattern Ur-Imp
- 49287-6 - Organic Acids Pattern Ur-Imp
- 49549-9 - Ref lab test method
Result Turnaround Time
3-7 days
Related Documents
For more information, please review the documents below
Specimen
Urine
Volume
10 mL
Minimum Volume
3 mL
Container
Plastic urine container, no preservative
Storage Instructions
Freeze
Causes for Rejection
Urine too dilute; quantity not sufficient for analysis
Stability Requirements
| Temperature | Period |
|---|---|
| Frozen | 12 months |
Other tests from different labs that may be relevant