Test Details
Mnemonic
DLAU
Ordering Code
3800338
CPT-4 Code(s)
83605
Specimen Information
Patient Preparation
Biochemical Genetics Patient Information form required.
Collect
Random urine
Specimen Preparation
Send 0.5 mL urine in a screw capped plastic urine cup. No preservative.
Frozen.
Frozen.
Alternate Specimen
24 hour urine
Minimum Volume
0.15 mL
Transport Temperature
Frozen
Rejection Criteria
Urine collected with preservative
Stability
Room temperature: 90 days
Refrigerated: 90 days
Frozen: 90 days
Refrigerated: 90 days
Frozen: 90 days
Methodology
Gas Chromatography-Mass Spectrometry (GCMS) Stable Isotope Dilution Analysis
Reference Range
0.0 - 0.25 mmol/L
Performing Laboratory
MAYO
New York DOH Approval Status
No