Complement Blood Test
Complement Blood Test: An Overview
The complement blood test is a type of blood test that measures the level of complement proteins in the blood. Complement proteins are parts of the immune system that work with antibodies to destroy microbes, activate the body’s defenses, and help regulate inflammation. The test results help doctors diagnose and monitor a variety of conditions, including immune system disorders, infections, and autoimmune disorders such as rheumatoid arthritis and lupus.
Preparation
No special preparation is needed for a complement blood test. Simply arrive for the test when requested and follow the instructions of the doctor and technician.
Procedure
The procedure for a complement blood test is the same as for any other type of blood test. A technician will draw a blood sample from a vein in the arm. The sample is then analyzed in a laboratory to measure the level of complement proteins.
Types of Complement Proteins
There are five different classes of complement proteins:
- C1
- C2
- C3
- C4
- C5
Why is a Complement Blood Test Performed?
A complement blood test is performed to help diagnose and monitor immune system disorders, infections, and autoimmune disorders such as rheumatoid arthritis and lupus.
When is a Complement Blood Test Performed?
A complement blood test can be performed at any time as part of an overall health evaluation or if a doctor suspects that a person has an immune system disorder or an infection. Complement tests are also used to monitor the effectiveness of treatment.
Risks of Complement Blood Tests
The risks of a complement blood test are minimal. There may be some minor discomfort or bruising at the site of the injection. The risk of infection is very low.