C1 Esterase Inhibitor Functional Activity Test

C1 Esterase Inhibitor Functional Activity Test Overview

The C1 esterase inhibitor protein is crucial in the human body and plays a vital role in the upkeep of the complement system and immune response of a person’s body. The C1 esterase inhibitor functional activity test is used by doctors to determine the functional performance and level of the C1 esterase inhibitor protein in the body. Based on the test results, doctors can identify the risk of and even diagnose conditions like hereditary angioedema. This condition is caused by a deficiency of the C1 esterase inhibitor protein and can lead to episodes of inflammation in the body.

Why is A C1 Esterase Inhibitor Functional Activity Test Prescribed?

The C1 esterase inhibitor functional test is prescribed by doctors to check for any deficiency of the C1 esterase inhibitor protein. Even if the level of this protein seems normal on quantitative tests, the C1 esterase inhibitor functional activity test can identify any problems with the protein’s functioning. Here are some of the symptoms that may warrant doctors prescribing this test.

• Unexplained swelling in the face, feet, hands, and genital areas

• Symptoms of diarrhoea

• Fainting spells

• Vomiting and nausea

• Throat swelling, which can be rare but very complicated

Components of C1 Esterase Inhibitor Functional Activity Test

The results of this test are expressed both in terms of the level of the C1 esterase inhibitor protein in your body as well as the presence of hereditary angioedema. The normal range of C1 esterase inhibitor protein is between 16 to 33 mg/dL. Based on the test results, doctors can diagnose the presence of angioedema. The quantitative analysis of the C1 esterase inhibitor protein levels can help doctors diagnose any deficiency that patients may have of this particular protein. In case of protein deficiency, doctors recommend an adequate treatment course.

Procedure and Prerequisites

The C1 esterase inhibitor functional activity test is performed as a simple blood test. The procedure involves drawing blood from the veins in the patient’s arm and sending the sample for testing. There are no specific prerequisites that patients need to following before undergoing this test.