Serum or Plasma Substance Concentration for Serine Protease Inhibitor (e.g., Alpha-1 Antitrypsin variant or related protease inhibitor)

What This Test Measures

Your sample contains a specific type of protein that naturally inhibits enzymes that could harm your body’s tissues. This test quantifies how much of this protein is present in your blood, which can vary depending on genetic factors, health conditions, or medications.

Why It Matters in Your Health

High or low levels of this protein may indicate conditions like genetic disorders affecting lung or liver function, chronic inflammation, or certain metabolic issues. It’s often used alongside other tests to diagnose or monitor these conditions.

Common Reasons for Testing

Doctors may order this test if you have symptoms like persistent coughing, shortness of breath, or liver-related issues (e.g., jaundice, fatigue). It’s also used in research or specialized screening for inherited protein disorders.

Sample Collection and Preparation

A blood sample is drawn from your arm, typically in the morning after fasting. The blood is processed to separate serum or plasma, which is then sent to a lab for analysis. Avoid strenuous activity or certain medications before testing for best accuracy.