OVERVIEW:
What is the C 4 (complement level 4) lab test?
A C 4 (complement level 4) lab test is a blood test that measures the level of C 4 in the blood.
Why is the C 4 (complement level 4) lab test done?
A C 4 (complement level 4) lab test is done in order to:
- Monitor the level of C 4 in the blood,
- Diagnose C 4 deficiency.
What does the C 4 (complement level 4) lab test measure?
A C 4 (complement level 4) lab test measures the amount of C 4 circulating in the blood. C 4 is a protein of the immune system. C 4 performs a significant role in immunity, tolerance, and autoimmunity. C 4 also plays a vital role in activating the body’s innate immune system.
Are there any risks associated with this test?
There are no known risks associated with this test.
How should I prepare for this test?
This test does not require any special preparation.
How will this test feel?
When the needle is inserted to draw blood, some people feel moderate pain. Others may feel only a prick or stinging sensation.
What are the symptoms of an abnormal C 4 level?
Extreme fatigue, muscle and joint pain, unintended weight loss, muscle weakness, and muscle paralysis are some common symptoms of an abnormal C 4 level.
What are the side effects of this test?
There are no significant side effects of this test, however, rarely a person might experience the following side effects: soreness and swelling at the puncture sight, excessive bleeding, and slight dizziness.
The normal level of C 4 (complement level 4) is between 16-48 mg/dL.
A C 4 (complement level 4) lab test is done in order to:
- Monitor the level of C 4 in the blood,
- Diagnose C 4 deficiency.
