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C4 Complement Blood Test
Book the C4 Complement Serum Test with Max@Home to diagnose immune and inflammatory conditions.
₹1310 ₹1048
Report Time
24 Hours
10 -12 hrs of Fasting Required
FREE
Home Sample Collection
Age Group
All Age Group
Parameters Included
1
Recomended for
Both
Call: 9240299624 C4 Complement Blood Test
Fasting
10 -12 hrs of Fasting Required
Report Time
24 Hours
Exclusive Offer
₹1048
₹1310
FREE Home Sample Collection*
FREE Smart Report
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Understanding the Test
Test Measures
City Price Info
FAQs
Understanding the C4 Complement Blood Test
The C4 Complement Blood Test is a blood test that measures the level of complement component 4 (C4), a protein that forms part of the body's complement system. The complement system is a group of proteins that work together to support the immune system by helping identify and remove harmful microorganisms, damaged cells, and immune complexes.
C4 plays an important role in activating the classical complement pathway, one of the body's natural defence mechanisms. Changes in C4 levels may occur when the complement system is activated or when certain immune-related conditions affect the production or consumption of complement proteins. Measuring C4 levels helps doctors assess complement system activity and supports the evaluation of autoimmune diseases, hereditary angioedema, and other immune-related disorders.
MAX@Home offers the C4 Complement Blood Test with convenient home sample collection by trained healthcare professionals, making it easier to undergo testing from the comfort of home.
C4 Complement Blood Test Measures
The C4 Complement Blood Test measures the concentration of complement component 4 (C4) present in the blood, rather than directly assessing overall functional complement activity. Functional capacity is evaluated separately through tests such as CH50. The results help doctors evaluate complement system levels and are interpreted alongside symptoms, medical history, and other laboratory investigations to support clinical assessment.
C4 Complement Blood Test Price For Other Cities
When is the C4 Complement Blood Test Recommended?
A doctor may recommend the C4 Complement Blood Test when certain symptoms, medical conditions, or previous test results suggest that further evaluation of the immune system is required. The test may be recommended in the following situations:
- Persistent or Unexplained Swelling: The test may be recommended for individuals experiencing recurrent swelling of the face, hands, feet, abdomen, or airways. It is often included in the initial evaluation of suspected hereditary angioedema (HAE). However, C4 measurement alone cannot establish or exclude an HAE diagnosis; specific testing of C1-inhibitor concentration and functional activity is required, even when C4 levels are within normal limits.
- Note: Any swelling affecting the tongue or throat, or any difficulty breathing, constitutes a medical emergency requiring immediate emergency medical evaluation rather than waiting for home sample collection or routine diagnostic testing.
- Symptoms Suggestive of an Autoimmune Disease: Individuals with symptoms such as persistent joint pain, unexplained skin rashes, prolonged fatigue, fever, or other signs of autoimmune disease may require C4 testing as part of a broader diagnostic work-up.
- Abnormal Autoimmune or Complement Test Results: The test may be advised when previous investigations, such as ANA, anti-dsDNA, or other complement tests, indicate the need for further assessment of complement system activity.
- Kidney Problems with Suspected Immune Involvement: Doctors may recommend the test when there are signs of kidney disease, such as protein or blood in the urine, and an autoimmune cause is being considered.
- Follow-up of an Established Immune-Related Condition: For individuals diagnosed with certain autoimmune disorders, repeat C4 testing may be recommended to monitor disease activity. In established hereditary angioedema, routine repeat C4 testing is generally not used to monitor acute attacks or treatment response, though periodic re-evaluation may be advised in specific clinical contexts as part of an overall management plan.
How is the Sample Collected at Home?
The C4 Complement Blood Test is performed using a blood sample collected from a vein in the arm. MAX@Home offers convenient home sample collection by trained phlebotomists, allowing the test to be completed from the comfort of home. The sample collection process typically involves the following steps:
- Selection and Cleaning of the Collection Site: A suitable vein, usually in the arm, is identified, and the skin is cleaned with an antiseptic solution to help maintain hygiene and reduce the risk of contamination.
- Blood Sample Collection: A sterile needle is gently inserted into the vein, and a small blood sample is collected into a specialised collection tube. A brief pinching sensation may be experienced during this step.
- Completion of the Procedure: Once the required sample has been collected, the needle is removed, gentle pressure is applied to the collection site, and a small bandage may be placed over the area, if required.
- Sample Handling and Transportation: The blood sample is carefully labelled, packed, and transported to an NABL-accredited laboratory under appropriate conditions for analysis.
Understanding Your Results
The C4 Complement Blood Test measures the level of complement component 4 (C4) in the blood. The results help doctors assess complement system activity and are generally interpreted as low, normal, or high C4 levels. The table below explains what low and high C4 levels may indicate.
| Result | What it May Indicate |
| Low C4 levels | Low C4 levels may indicate increased consumption or reduced production of complement proteins. This may be seen in autoimmune diseases such as systemic lupus erythematosus (SLE), hereditary angioedema, certain kidney disorders, or other immune-related conditions. Additional investigations may be required to determine the underlying cause. |
| Normal C4 levels | Normal C4 levels generally suggest that complement component 4 is within the expected reference range. However, a normal result does not completely rule out an underlying medical condition and should always be interpreted alongside symptoms, medical history, and other laboratory findings. |
| High C4 levels | High C4 levels are less common and may occur during acute inflammation or in certain inflammatory conditions. The result is interpreted together with clinical findings and other laboratory tests, as an elevated C4 level alone does not confirm a specific diagnosis. |
Note: A C4 Complement Blood Test result alone cannot diagnose a medical condition. Doctors interpret the findings together with symptoms, medical history, physical examination, and related investigations, such as complement tests and autoimmune antibody tests, to determine whether further evaluation or treatment is required.
Preparation for the C4 Complement Blood Test
Proper preparation helps ensure accurate test results. For the C4 Complement Blood Test, a fasting period of 10 to 12 hours is generally required. Follow the doctor's or laboratory's instructions carefully to ensure the test is performed under the appropriate conditions. Before the test:
- Inform the doctor about medications: Certain medications may influence complement protein levels or affect the interpretation of the results. Inform the doctor about any prescription medicines, over-the-counter medications, or supplements being taken before the test.
- Share relevant medical history: Inform the doctor about any autoimmune diseases, recent infections, ongoing treatments, or other medical conditions that may be relevant to the interpretation of the test results.
- Stay hydrated: Drinking plain water during the fasting period is generally permitted and may help make blood sample collection easier unless advised otherwise.
- Follow any additional instructions: If the doctor or laboratory has provided specific preparation guidelines, follow them carefully to help ensure accurate test results.
C4 Complement Blood Test Price
The cost of the C4 Complement Blood Test may vary depending on your location and whether the test is booked individually or as part of a diagnostic package.
MAX@Home offers transparent pricing with no hidden charges. For the latest price or available offers, contact 9240299624. The team will provide accurate pricing based on the required service and answer any questions related to test booking.
Related Diagnostic Tests
Depending on the symptoms and the doctor's recommendation, additional tests may be advised alongside the C4 Complement Blood Test to provide a more comprehensive assessment of immune system function and support the evaluation of autoimmune disorders.
Complement C3 Test
The C3 Complement Test is often ordered together with the C4 Complement Blood Test because both proteins are part of the complement system. Evaluating C3 and C4 levels together helps doctors better understand complement activity and identify patterns that may be associated with autoimmune diseases, certain kidney disorders, or other immune-related conditions.
ANA Test
The ANA (Antinuclear Antibody) Test is commonly used to screen for autoimmune diseases. When interpreted alongside C4 levels, it provides additional information during the evaluation of conditions such as systemic lupus erythematosus (SLE) and other connective tissue disorders.
Anti-dsDNA Antibody Test
The Anti-dsDNA Antibody Test is frequently recommended when systemic lupus erythematosus (SLE) is suspected or requires monitoring. Combined with C4 test results, it can help doctors assess disease activity and support ongoing clinical evaluation.
Rheumatoid Factor (RF) Test
The Rheumatoid Factor (RF) Test helps evaluate autoimmune conditions, particularly rheumatoid arthritis. While C4 is not a routine investigation for rheumatoid arthritis, an RF test may be ordered alongside complement studies when the broader clinical picture or overlapping symptoms warrant investigation for joint-related autoimmune conditions.
Why Choose MAX@Home for the C4 Complement Blood Test?
MAX@Home makes diagnostic testing more convenient by bringing professional healthcare services to your doorstep. From home sample collection to report delivery, every step is designed to provide a safe, reliable, and hassle-free testing experience. Benefits of choosing MAX@Home include:
- Convenient Home Sample Collection: Get your blood sample collected at your preferred time and location by a trained healthcare professional.
- Trained Healthcare Professionals: Blood samples are collected by trained phlebotomists using standard safety and hygiene protocols to ensure a comfortable experience.
- Reliable Laboratory Testing: Your sample is processed in an NABL-accredited laboratory using standard laboratory protocols to support accurate and dependable test results.
- Digital Report Delivery: Receive your test report securely through digital channels within 24 hours of sample collection, making it easy to access and share with your doctor.
- Easy Appointment Booking: Schedule your test quickly by calling 9240299624 or through the MAX@Home online booking channels.
Read More
Frequently Asked Questions
What is the C4 Complement Serum test?
Why is the C4 test recommended in autoimmune evaluation?
Which conditions are associated with C4 Complement testing?
How does the C4 test help assess immune system activity?
When are C3, C4, and CH50 tests ordered together?
What does a low C4 level indicate?
What does a high C4 level mean?
What factors can influence C4 test results?
How should I understand my C4 Complement test report?
How can I book the C4 Complement Serum test with home sample collection?
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