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HelpTest Code NAACD N-Acetylaspartic Acid, Canavan Disease, Random, Urine
Necessary Information
1. Patient's age and sex are required.
2. Include family history, clinical condition (asymptomatic or acute episode), diet, and drug therapy information
Specimen Required
Supplies: Urine Tubes, 10 mL (T068)
Container/Tube: Plastic, 10-mL urine tube
Specimen Volume: 10 mL
Pediatric: If insufficient collection volume, submit as much specimen as possible in a single container; the laboratory will determine if volume is sufficient for testing.
Collection Instructions:
1. Collect a random urine specimen (first morning void preferred).
2. No preservative.
Forms
Useful For
Diagnosis and monitoring of individuals with Canavan disease
Follow-up quantitation of abnormal organic acid elevations of N-acetylaspartic acid
Special Instructions
Method Name
Gas Chromatography Mass Spectrometry (GC-MS)
Reporting Name
N-acetylaspartic acid, USpecimen Type
UrineSpecimen Minimum Volume
3 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Urine | Frozen (preferred) | 90 days | |
| Refrigerated | 90 days | ||
| Ambient | 14 days |
Reject Due To
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.Reference Values
≤50.00 mmol/mol creatinine
Day(s) Performed
Monday, Wednesday, Friday
Report Available
3 to 6 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
Test Classification
This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.CPT Code Information
83921
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| NAACD | N-acetylaspartic acid, U | 76023-1 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 621425 | Interpretation | 59462-2 |
| 621424 | N-acetylaspartic acid | 76023-1 |
| 621426 | Reviewed By | 18771-6 |