Alpha-1-Antitrypsin Clearance

• CPT Code: 82103
• LOINC:
• Specimen Type: Red or SST plus 24 hr Stool
• Frequency: Setup: Mon-Sat; Analytic time 1 day
• Instructions: 1mL serum from red or gel clot, refrigerated PLUS entire 24 hr stool collection, refrigerated. Min 0.5mL serum and 1mL homogenized stool.
• Text: A1A is resistant to degradation by digestive enzymes and is used as an endogenous marker for the presence of blood proteins in the intestinal tract. A1A clearance is reliable for measuring protein loss distal to the pylorus.
• Methodology: Nephelometry