Also known as: C1; C1q; C2; C3; C4; Total Complement; CH50; CH100; Total Hemolytic Complement Activity; C1 esterase inhibitor
Formal name: Complement Activity; Complement Component C3; Complement Component C4
Related tests: Antibody Tests; ESR; CRP; RF; ANA; Autoantibodies
Why should I do it?
To determine whether deficiencies or abnormalities in complement system proteins are contributing to increased infections or increased autoimmune activity; to monitor the activity of autoimmune diseases; to help diagnose hereditary angioedema
When should I do it?
When you have recurrent microbial (usually bacterial) infections, unexplained inflammation or edema, or symptoms related to an autoimmune disorder; periodically to help monitor a known acute or chronic condition that affects the complement system
What Kind of Sample is Needed?
A blood sample drawn from a vein in your arm
Test Preparation Needed?