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Delta-Aminolevulinic Acid Quantitative, random urine
| Item | Value | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Approval req'd? | Yes, contact Chemistry/Immunology Resident at 415-353-1438. | ||||||||
| Available Stat? | No | ||||||||
| Test code | ALAQR | ||||||||
| Test group | D-ALA | ||||||||
| Performed by | Quest | ||||||||
| Sendout? | Yes | ||||||||
| Method | Colorimetric | ||||||||
| Patient Preparation | Do not use first morning void, late evening specimen (after 8:00 pm), or specimen after excessive fluid intake. Recommend patient to collect urine specimen and submit to laboratory on-site to maintain specimen stability. | ||||||||
| Collection Instructions | Cover urine cup with foil to protect sample from light and refrigerate. | ||||||||
| Container type | Urine cup wrapped in aluminum foil. | ||||||||
| Amount to Collect | See preferred volume | ||||||||
| Sample type | Random urine | ||||||||
| Preferred volume | 2 mL urine | ||||||||
| Min. Volume | 0.6 mL urine | ||||||||
| Processing notes | Aliquot urine into a dark brown tube and refrigerate. Order Quest test # 6301. | ||||||||
| Units | mg/g creatinine | ||||||||
| Normal range | Pediatric:
≥ 18 years:
|
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| Synonyms | ALA; D-ALA; DALA; D-aminolevulenic acid; Porphyrin precursors; Porphyria | ||||||||
| Stability | Room temperature unaccceptable, refrigerated 1 week, frozen at -20C 1 month. | ||||||||
| Turn around times | Test run 2x per week. TAT 6-8 days | ||||||||
| Additional information | This test is the usual first step in the diagnosis acute intermittent porphyria. Patients with hereditary forms of porphyria usually will present with profound elevations of this analyte (> 5-fold) during acute episodes. Moderate elevations (< 3-fold) are more often due to medications or enviromental factors. | ||||||||
| CPT coding | 82135-90 | ||||||||
| LOINC code | 13728-1 | ||||||||
| Last Updated | 3/24/2013 7:55:45 PM | ||||||||
| Entry Number | 1086 |
If you have additional questions regarding this test, please call: 415-353-1667