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Alias Names: Soft-A1AF / Antitrypsin, Feces
Methodology: Nephelometry (NEPH)
Edit Date: 8/18/2010
Performed: Monday-Saturday
Released: 48 hours after setup at PeaceHealth Laboratories’ reference lab
CPT Code: 82103-90
Specimen Collection Details
Collection: Entire 24-hour stool collection in a pre-weighed Mayo stool collection container. If no specimen obtained in 24 hours, extend collection to 48-72 hours and note time frame.
Handling: Freeze.
Standard Volume: Random specimen will be accepted for testing, but the reference values will not apply.
Transport: Frozen on dry ice.
Comments: Useful for diagnosing protein-losing enteropathies, especially when used in conjunction with serum A1A levels as a part of A1A clearance studies. See also: Antitrypsin Clearance, Stool and Serum (80450).

Reference Range:
≤ 54 mg/mL

Patients with protein-losing enteropathies generally A1A stool concentrations >100 mg/mL.
Borderline elevations above the normal range are equivocal for protein-losing enteropathies.

PeaceHealth Laboratories