Clinics and Departments

Laboratory Services

Lab Dept:

Urine/Stool

Test Name:

AMINOLEVULINIC ACID, URINE RANDOM

General Information

Lab Order Codes:

UALAR

Synonyms:

Aminolevulinic Acid (ALA), Urine Random; Delta ALA, Urine Random; Delta Aminolevulinic Acid, Urine Random

CPT Codes:

82135 – Aminolevulinic acid, delta (ALA)

Test Includes:

Urine Aminolevulinic acid concentration reported in nmol/mL.

Logistics

Test Indications:

Useful for assistance in the differential diagnosis of the various porphyrias. As an Indicator of lead toxicity in children.

Lab Testing Sections:

Urine/Stool - Sendouts

Referred to:

Mayo Medical Laboratories (MML Test: ALAUR)

Phone Numbers:

MIN Lab: 612-813-6280

STP Lab: 651-220-6550

Test Availability:

Daily, 24 hours

Turnaround Time:

3 - 6 days, test set up Tuesday and Thursday at 8 am (not reported Saturday or Sunday)

Special Instructions:

N/A

Specimen

Specimen Type:

Urine, random

Container:

Plastic leakproof urine container

Draw Volume:

Entire Random urine collection

Processed Volume:

2 mL (Minimum: 1 mL) random urine

Collection:

Routine random urine collection

Special Processing:

Lab Staff: Remove urine aliquot. Store and ship the specimen at refrigerated temperatures. Forward promptly.

Patient Preparation:

Patient should abstain from alcohol for 24 hours prior to and during testing.

Sample Rejection:

Specimens other than urine; mislabeled or unlabeled specimens

Interpretive

Reference Range:

Age

Range (nmol/mL)

<1 year:

< or =10 nmol/mL

1 – 17 years:

< or =20 nmol/mL

> or = 18 years:

< or =15 nmol/mL

Critical Values:

N/A

Limitations:

The differential diagnosis of delta-aminolevulinic aciduria must be considered on the basis of the patient’s clinical presentation.

The preferred test for lead toxicity in children is blood lead.

Methodology:

Liquid chromatography – Tandem Mass Spectrometry (LC-MS/MS)

References:

Mayo Medical Laboratories Web Page August 2012



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