Description
C4 complement
Sample Type:Serum
Tests Included:
Complement Component 4 (C4) measurement
Sample Required:
Blood sample
Test Time:
Results are typically available within a few days.
Te
st Range Values:
Normal C4 complement levels vary between laboratories. Typically, it ranges from 12 to 72 milligrams per deciliter (mg/dL).
What is the test?
The C4 Complement test measures the concentration of complement component C4 in the blood, which is part of the immune system involved in various immune responses.
Test Procedure:
A blood sample is drawn from a vein, and the concentration of C4 complement is measured in the laboratory.
When to take the test:
The test is recommended when evaluating suspected immune system disorders, autoimmune diseases, or monitoring disease activity.
Who should take the test:
Patients with suspected autoimmune diseases, certain infections, or those being monitored for conditions affecting complement levels might require this test. It’s usually ordered by rheumatologists, immunologists, or nephrologists.
Precautions for exceptional cases (pregnancy, etc.):
Pregnancy can impact complement levels, but there are no specific precautions related to the test during pregnancy. Pregnant individuals should inform their healthcare provider.
Frequently Asked Questions (FAQs) for C4 Complement Test:
Q1: What does low C4 complement levels indicate?
A: Low C4 levels might suggest conditions like lupus, certain infections, or other autoimmune diseases affecting the complement system.
Q2: Can medications influence C4 complement levels?
A: Some medications, particularly those used in autoimmune disease treatments, might impact C4 levels. Inform healthcare providers about medications.
Q3: Can C4 levels change with age?
A: Age-related changes might affect C4 levels, but the impact varies among individuals and isn’t the sole factor for interpretation.
Q4: How does C4 complement relate to the immune system?
A: C4 is involved in various immune responses, including the complement cascade, which plays a role in inflammation and defense against infections.
Q5: Can dietary changes affect C4 complement levels?
A: Dietary changes typically do not significantly affect C4 levels. However, maintaining a balanced diet contributes to overall health, which indirectly influences immune function.
*Please note that specific testing protocols and guidelines may vary based on the latest recommendations from health authorities and regulatory agencies. It is essential to consult healthcare professionals and follow local testing guidelines for accurate and appropriate testing.
