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Delta Aminolevulinic Acid, 24-Hour Urine
MessageMust include total volume at transmission
Test Code
DALAU
Quest Code
219
Alias/See Also
219
TUDALA
TUDALA
CPT Codes
82135
Includes
CPT code 81050 may be added at an additional charge for volume measurement
Preferred Specimen
2 mL urine from a 24-hour collection - no preservative - protect from light
Minimum Volume
0.6 mL
Other Acceptable Specimens
Urine preserved with 25 mL 6N HCl or 10 mL concentrated glacial acetic acid • Preservative added after collection • Catheterized urine in a sterile, plastic screw-cap container
Instructions
Collect without preservative. Refrigerate during and after collection. Wrap container in aluminum foil to protect from light. Please specify on the request form and on the urine container the total 24-hour urine volume.
Transport Temperature
Refrigerated (cold packs)
Specimen Stability
Room temperature: Unacceptable
Refrigerated: 7 days
Frozen: 30 days
Refrigerated: 7 days
Frozen: 30 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Received room temperature • Not protected from light
Methodology
Colorimetric (C)
Setup Schedule
P.M. Sets up 2 days a week.
Reference Range
Delta ALA, 24-Hour Urine
Creatinine, 24-Hour Urine
| Adults | <4.5 mg/24 h |
Creatinine, 24-Hour Urine
| 3-8 Years | 0.11-0.68 mg/24 h |
| 9-12 Years | 0.17-1.41 mg/24 h |
| 13-17 Years | 0.29-1.87 mg/24 h |
| Adults | 0.63-2.50 mg/24 h |
Clinical Significance
ALA is a precursor to uroporphyrin, coproporphyrin, and protoporphyrin. Concentrations of ALA are greatly increased in many patients with acute neurological forms of porphyrias and in some patients with chronic alcohol abuse.
Performing Laboratory
Quest Diagnostics Chantilly Nichols Institute
14225 Newbrook Dr.
Chantilly, VA 20151-2228
