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Factor XI Assay


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check_circle1 test included
schedule5 day turnaround   info
invert_colors Venous blood sample    info
Special Instructions
Contact Medichecks prior to ordering this test online.

Factor XI Assay

About this test

Factor XI is a clotting factor that plays a key role in the clotting, or coagulation, cascade that is triggered when a blood vessel is damaged.

Factor XI deficiency is a rare inherited bleeding disorder that occurs when an individual has too little of the protein factor XI.

Factor XI may also be called hemophilia C or Rosenthal syndrome.

Haemophilia refers to an inherited clotting disorder. There are three types of haemophilia: A, B, and C.

Clotting or coagulation disorders occur when the blood does not form clots properly. Blood clots are clumps of different types of blood cells and proteins called clotting factors that stop bleeding after an injury. The process of blood clotting is called coagulation or haemostasis.

When a blood vessel breaks due to an injury or surgical incision, it narrows to slow blood flow so that clotting can begin. At the same time, the blood that has leaked outside of the injured blood vessel presses against the vessel to help prevent further blood loss. Blood cells called platelets are activated to move toward the site of injury. Once platelets reach the site of injury, a series of reactions started by enzymes called coagulation factors lead to the activation of a protein called thrombin. Factor XI is one of the coagulation factors. These factors convert a blood clotting factor, fibrinogen, into long strands that form a net around the platelets and blood cells to help trap more platelets to form a blood clot.

How it works

Collect Sample

We send you an easy-to-use kit to collect your blood sample.

Post Sample

Post your sample to our lab in the prepaid envelope provided.

View Results

View results securely in your own personal dashboard.

Important Information

Our tests are not a substitute for seeing your doctor, especially if you are suffering symptoms. Our doctors will interpret your results based on the information you have provided, but will not diagnose, consult or provide any treatment. You will be advised to see your doctor for any necessary follow-up action.

Tests Included

Laboratory appointment in London

Your Blood sample will be analysed at our chosen laboratory based in the heart of London's medical district. You can be assured of fast, accurate results from the UK's largest independent provider of clinical diagnostic tests

Private laboratory analysis

Your blood sample will be analysed at one of our chosen laboratories. You can be assured of fast, accurate results from one of our accredited independent providers of clinical diagnostic tests.

Interpretation of results

Our medical team will comment on out-of-range blood test results and give you follow-up advice where necessary. If you need it, a PDF copy of your Factor XI Assay test results can be downloaded for your doctor.

Secure online account with

Once you have placed your order you will receive login details to where you can manage your account, track your orders and view your Factor XI Assay test results.

Health and Lifestyle tracker

Stay motivated by filling in your online health and lifestyle questionnaire and seeing how improvements in your lifestyle can influence your test results. Your medical and family history gives us vital information when interpreting your results.

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