Complement C3, C4
Laboratory Tests
≈ ¥20-50
(≈ $3-7)
15 min
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Description
Estimated cost for Complement C3, C4 at general public hospitals in China is about ¥15-40, and at Grade 3A hospitals about ¥20-50, varying by hospital tier and region.
Main Uses
Complement C3 and C4 tests are primarily used to diagnose and monitor autoimmune disorders like systemic lupus erythematosus (SLE), to evaluate kidney function in cases of glomerulonephritis, and to assess the body's immune response in various inflammatory and infectious diseases.
Normal Range
The normal range for Complement C3 is typically 80-160 mg/dL, and for Complement C4 it is usually 10-40 mg/dL. These values can vary slightly depending on the laboratory and the specific method used.
Low Values - Possible Causes
Low levels of Complement C3 and C4 may be caused by: autoimmune diseases such as lupus, glomerulonephritis, liver disease, sepsis, or hereditary angioedema.
High Values - Possible Causes
High levels of Complement C3 and C4 are less common but can occur in: acute or chronic inflammatory conditions, certain cancers, and during the recovery phase of an infection or inflammation.