Factor XI Functional Test
Also known as: Factor XI Activity Test, FXI Functional Test
Factor XI Functional Test test available at DNA Labs India for ₹4,500. Uses Photo-optical Clot Detection on Whole Blood samples. Results in Reports typically available within 24-48 hours after sample receipt at the lab.. Free home collection in 300+ cities across India.
🩺 Medically Reviewed By
Dr SHAILAJA RAGHUNATH MURDESHWAR
Consultant Physician · Reg: 8052
Last reviewed: September 7, 2026
Overview
To measure the functional activity of Factor XI in the blood and diagnose bleeding disorders associated with its deficiency.
- Test Code
- 546
- Price
- ₹4,500
- Sample Type
- Whole Blood
- Result Time
- Reports typically available within 24-48 hours after sample receipt at the lab.
- Fasting Required
- Yes (8 hours)
- Method
- Photo-optical Clot Detection
Sample Collection
Overnight fasting is preferred. Discontinue Heparin for 1 day and Oral Anticoagulants for 7 days with physician consent.
Method: Venipuncture
Laboratory Analysis
Collection of 3 mL whole blood in Sodium Citrate tube, inversion mixing.
Report Delivery
Transport to lab within 4 hours or prepare platelet-poor plasma (PPP) and freeze immediately.
Timeline: Reports typically available within 24-48 hours after sample receipt at the lab.
Patient Instructions
About This Test
Who Should Get This Test
To measure the functional activity of Factor XI in the blood and diagnose bleeding disorders associated with its deficiency.
How to Prepare
- Collect 3 mL whole blood in Blue Top (Sodium Citrate) tube
- Mix thoroughly by inversion
- Transport to lab within 4 hours
- If delay, prepare PPP by centrifuging at 3600 rpm for 15 min twice, then freeze supernatant
Doctor's Notes
Reviewed by Dr SHAILAJA RAGHUNATH MURDESHWAR — MBBS, MD (General Medicine) · Reg. No. 8052
"Factor XI functional test is essential for diagnosing hereditary bleeding disorders and guiding personalized treatment plans to prevent complications."
Last medically reviewed: September 7, 2026
Test Parameters & Specifications
Sample Stability
- Improper sample handling
- Clotted sample
- Incorrect tube type
- Hemolyzed sample
Understanding Your Results
Factor XI activity within normal range, no significant deficiency
Level: Normal (50-150%)
Possible Factor XI deficiency, indicating increased bleeding risk
Level: Low (<50%)
Usually not clinically significant, but may require follow-up
Level: High (>150%)
If you experience symptoms of bleeding disorders such as easy bruising, prolonged bleeding, or abnormal test results, consult a healthcare professional immediately.
Limitations
- ⚠Cannot detect all types of bleeding disorders
- ⚠May require additional tests for confirmation
Risks & Considerations
- ●Minor bruising at injection site
- ●Rare infection risk
- ●Dizziness or fainting during blood draw
Interfering Factors
- ●Heparin therapy
- ●Oral anticoagulants
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