Alpha-1 Antitrypsin Deficiency Genetic Testing

What Is AAT Deficiency Testing?

A blood test can measure the amount of alpha-1 antitrypsin (AAT) in your blood. You may have AAT deficiency if your levels are low or if the blood test is not able to find any AAT in your blood. If your AAT level is lower than normal, the blood sample can be tested to look for the type of alpha-1 antitrypsin. People who carry the changed gene may be more at risk for symptoms if they have a certain type of alpha-1 antitrypsin.

Alpha 1-antitrypsin levels

Normal:	85–213 mg/dL or 0.85–2.13 g/L

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Author:	Maria G. Essig, MS, ELS	Last Updated: May 8, 2008
Medical Review:	Caroline S. Rhoads, MD - Internal Medicine Ken Y. Yoneda, MD - Pulmonology
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