C1 Esterase Inhibitor, Serum analysis is a laboratory test used to measure the level of C1 esterase inhibitor in blood serum. This protein is a vital part of the immune system and plays an important role in regulating inflammatory and allergic responses. This test is specifically performed to diagnose C1 esterase inhibitor deficiency, such as hereditary angioedema, a condition that leads to recurrent episodes of tissue swelling. Symptoms may appear in areas such as the face, hands, and throat, requiring accurate diagnosis. By measuring the levels of this inhibitor, physicians can determine the underlying cause of the patient’s symptoms, helping guide appropriate treatment decisions. The results of this analysis assist in better understanding the patient’s health condition and directing necessary medical care.