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HelpTEST ID A1AF Alpha-1-Antitrypsin, Random, Feces
Reporting Name
Alpha-1-Antitrypsin, Random, FSpecimen Type
FecalOrdering Guidance
The preferred test for diagnosing protein-losing enteropathies is A1AFS / Alpha-1-Antitrypsin Clearance, Feces and Serum.
Specimen Required
Supplies:
-Stool container, Small (Random), 4 oz (T288)
-Stool Collection Kit, Random (T635)
Container/Tube: Stool container
Specimen Volume: 5 g
Collection Instructions: Collect a random fecal specimen.
Specimen Minimum Volume
Homogenized Stool: 1 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Fecal | Frozen (preferred) | 14 days | |
| Ambient | 14 days | ||
| Refrigerated | 14 days |
Method Name
Nephelometry
Reject Due To
| Feces collected in any preservative or fixative | Reject |
Reference Values
≤54 mg/dL
Day(s) Performed
Monday through Friday
Report Available
1 to 3 daysSpecimen Retention Time
14 days; supernatant aliquot only, the feces are discarded after processingPerforming Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
82103
Useful For
Diagnosing protein-losing enteropathies, especially when used in conjunction with serum alpha-1-antitrypsin (AAT) levels as a part of AAT clearance studies