Factor II Functional Test: Booking, Price, and Results
About Factor II Functional Test: Booking, Price, and Results
| Field | Value |
|---|---|
| Also Known As | Prothrombin Assay, Factor II Activity Test, F2 Activity Test, Factor II Clotting Assay, Prothrombin Activity Test |
| Sample Type | Venous blood (citrated plasma) |
| Fasting Required | No fasting required |
| Report Time | 24 to 48 hours |
| Recommended For | All ages and genders, especially those with bleeding disorders, unexplained bruising, or suspected clotting abnormalities |
| Price | Starting at ₹3,600 |
What Is a Factor II Functional Test?
The Factor II Functional Test measures the activity of prothrombin, a clotting protein in the blood also called Factor II. Doctors order this test when a patient has unexplained bleeding, abnormal results from routine clotting tests, or a suspected clotting disorder. A blood sample drawn from a vein is used to run the test. It is also referred to as the Prothrombin Assay or the F2 Activity Test.
What Does a Factor II Functional Test Measure?
This test evaluates how well Factor II (prothrombin) is working in the blood. Prothrombin is a protein made in the liver that plays a key role in the clotting process. When activated, it converts into thrombin, which then helps form the fibrin mesh that seals a wound.
The table below outlines the parameters this test assesses.
| Parameter | What It Tells You |
|---|---|
| Factor II activity (adults) | How well prothrombin is functioning, expressed as a percentage of normal plasma activity |
| Factor II activity (newborns) | Adjusted interpretation as newborn levels are naturally lower than adult levels |
Why Is a Factor II Functional Test Done?
This test is ordered when a doctor needs to investigate why a patient bleeds more than expected or when routine clotting screens show unusual results. Below are the main reasons it may be requested.
Common Symptoms That May Require This Test
Several bleeding-related symptoms may prompt a doctor to order a Factor II Clotting Assay. These include:
- Heavy or prolonged bleeding after surgery or trauma
- Abnormal bleeding following childbirth
- Heavy menstrual bleeding
- Bruising easily without a clear cause
- Nosebleeds that are difficult to stop
- Bleeding at the umbilical cord site in newborns
- Prolonged bleeding from minor cuts or wounds
- Bleeding under the skin
Conditions This Test Can Help Detect
The Factor II activity test can help identify several clotting-related conditions. These include:
- Inherited prothrombin deficiency, either Type I (very low levels of prothrombin) or Type II (normal or near-normal levels of a faulty protein)
- Vitamin K deficiency, which reduces the liver's ability to produce clotting factors
- Severe liver disease affecting prothrombin production
- Effects of anticoagulant medicines such as warfarin on clotting factor activity
- Elevated prothrombin levels linked to the prothrombin G20210A gene variant, associated with an increased risk of venous thrombosis (blood clots forming in veins)
- Disseminated intravascular coagulation (a condition where clotting occurs abnormally throughout the body)
How to Prepare and What to Expect
Preparing correctly for this test helps ensure your sample is suitable for analysis. Here is what you need to know before your appointment.
Do You Need to Fast?
No fasting is required before this test. If you are having additional tests alongside this one, fasting requirements may differ, so check with your doctor.
Practical Tips Before Your Test
A few simple steps can help make sure your results are reliable. Keep the following in mind:
- Tell your doctor about all medicines you are taking, especially blood thinners such as warfarin or heparin
- Ideally, avoid warfarin for two weeks before the test; avoid heparin and direct Xa or thrombin inhibitor therapies for approximately three days beforehand
- Never stop any prescribed medication without first speaking to your doctor
- Drink plenty of water to stay well hydrated before the test
- Wear a short-sleeved or loose-fitting top for easy access to your arm
Step-by-Step Procedure
The sample collection process is straightforward. Here is what typically happens:
- A trained phlebotomist (blood collection specialist) cleans a small area on your inner arm with an antiseptic swab.
- A needle is gently inserted into a vein, usually in the crook of your elbow. You may feel a brief sting or prick.
- Blood is collected into a special blue-top tube containing a citrate solution that prevents early clotting.
- The tube is filled and mixed gently by inverting it several times to ensure the sample and solution combine properly.
- The needle is removed, and a small bandage or cotton pad is placed over the site. Any mild discomfort usually passes quickly.
- The sample is dispatched to the laboratory promptly, where it is processed within a few hours of collection to preserve accuracy.
Factors That Can Affect Accuracy
Certain conditions or oversights can influence test results. Be aware of the following:
- Being on anticoagulant therapy (warfarin, heparin, or direct clotting inhibitors) at the time of testing
- A very high red blood cell count (haematocrit above 55%), which requires the collection tube to be adjusted
- Delayed processing or inadequate mixing of the blood sample
- Haemolysis (breakdown of red blood cells in the sample)
- Dehydration, which can affect blood concentration
Understanding Your Factor II Functional Test Results
Your results should always be reviewed alongside your overall health history. The table below shows general reference ranges, but your doctor will interpret your specific values in context.
| Parameter | Normal Range | Notes |
|---|---|---|
| Factor II activity (adults) | 50% to 200% of the laboratory reference value | Some labs report 60% to 140% as the adult reference range |
These ranges are general guidelines. Your doctor will interpret your results based on your age, health history, and other factors. Always consult a qualified healthcare professional for personalised medical advice.
Results During Special Conditions
Certain situations can naturally alter Factor II activity levels. Your doctor will consider these when reviewing your report.
- Newborns naturally have lower prothrombin activity, and levels may remain below the adult reference range for up to 180 days after birth.
- If you have recently stopped warfarin therapy, it may take 10 to 14 days for your Factor II levels to return to their baseline.
- Patients with lupus anticoagulants (antibodies that interfere with clotting) may show reduced prothrombin levels due to increased clearance of the prothrombin-antibody complex.
- Liver disease can also reduce Factor II production, as prothrombin is made entirely in the liver.
How to Maintain Healthy Levels
While specific medical treatment is a matter for your doctor, the following general habits support healthy clotting function:
- Include vitamin K-rich foods in your diet, such as spinach, kale, and broccoli, as vitamin K is essential for prothrombin production
- Limit alcohol intake, since excessive consumption can affect liver health and, in turn, clotting factor production
- If you are on anticoagulant therapy, always consult your doctor before making any dietary changes, as certain foods can interact with these medicines
Lupin Diagnostics Factor II Functional Test Price and Home Collection
The Factor II Functional Test is available at Lupin Diagnostics with home sample collection across major Indian cities, starting at approximately ₹3,600.
| City | Approximate Price (₹) |
|---|---|
| Mumbai | ₹3,600 |
| Kolkata | ₹3,600 |
| Chennai | ₹3,600 |
| Hyderabad | ₹3,600 |
| Pune | ₹3,600 |
| Indore | ₹3,600 |
| Bangalore | ₹3,600 |
Prices are indicative and may vary by location. Please confirm the current price at the time of booking.
How to Book
- Select the test on the Lupin Diagnostics website.
- Choose your city and preferred time slot.
- Opt for home sample collection by a certified phlebotomist, or visit your nearest Lupin Diagnostics centre.
- Receive your report via email or WhatsApp within the stipulated turnaround time.
Home Collection
Lupin Diagnostics offers home sample collection for the Prothrombin Assay across cities, making it convenient to get tested without visiting a centre. All samples are processed in NABL-accredited laboratories by experienced technologists. Once ready, your digital report is shared directly via email or WhatsApp.
Frequently Asked Questions
This test measures the activity of prothrombin in your blood. Doctors use it to investigate unexplained or excessive bleeding, evaluate abnormal results from routine clotting screens, and assess the risk of blood clot formation linked to elevated prothrombin levels.
No. A PT test measures the overall speed of clotting along the extrinsic pathway. The Factor II Clotting Assay specifically quantifies prothrombin activity. It is typically ordered when a doctor needs to determine whether an abnormal PT result is due to a deficiency in Factor II specifically.
Low prothrombin activity can result from an inherited deficiency, vitamin K deficiency, severe liver disease, or the use of anticoagulant medicines such as warfarin. Your doctor will look at your full clinical picture to determine the likely cause.
Yes. Activity levels above 115% have been associated with an increased risk of thrombosis. The prothrombin G20210A gene variant can lead to elevated prothrombin in plasma and is considered a significant inherited risk factor for venous thrombosis, including deep vein thrombosis and pulmonary embolism.
Ideally, anticoagulant therapy should be paused before testing. Warfarin should generally be avoided for two weeks beforehand, and heparin or direct clotting inhibitors for around three days. However, never stop any prescribed medicine without your doctor's guidance.
Reports are typically available within 24 to 48 hours, though turnaround time may vary depending on the laboratory. Lupin Diagnostics will notify you when your report is ready via your chosen digital channel.
Yes, the test can be performed at any age. In newborns, normal Factor II activity is naturally lower (25% to 50%), so results are interpreted using age-specific reference values rather than the adult range.
Factor II Functional Test: Booking, Price, and Results
