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α1-Antitrypsin

The α1-antitrypsin (AAT) test is a blood test that measures the level of AAT protein in the blood. AAT is a protein that is produced in the liver and plays a role in protecting the lungs from damage caused by enzymes released during inflammation. The AAT test is primarily used to diagnose and monitor a rare genetic disorder called alpha-1 antitrypsin deficiency (AATD). AATD is an inherited condition that can cause lung disease, liver disease, and skin conditions. The condition is caused by a deficiency of AAT protein in the blood, which can lead to damage to the lungs and other organs.

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