How to Cite This Chapter: Don-Wauchope A, Chetty VT, Ivica J, Kavsak P, Khan WI, Lafreniere M, Nouri K, Solnica B. alpha1-Antitrypsin. McMaster Textbook of Internal Medicine. Kraków: Medycyna Praktyczna. Accessed May 26, 2024.
Last Updated: May 9, 2022
Last Reviewed: May 9, 2022
Chapter Information

For a brief introduction and guide to abbreviations, see Laboratory Tests: General Remarks.

Analyte [material]

alpha1-Antitrypsin (also called alpha1-antiprotease) [S]

Reference range, target level, or decision threshold

150-350 mg/dL (1.5-3.5 g/L)

Interpretation of results

↑ Inflammation and infection (acute-phase reactant), pregnancy, estrogen-containing medications

↓ Congenital alpha1-antitrypsin deficiency

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