How is Factor V Leiden diagnosed?

A DNA blood test is needed for diagnosis.

By a blood test and diagnosed by hematologist

Blood is taken for diagnosis of Factor V Leiden. Testing is done when an inappropriate clot happens to some one, especially under the age of 50 or when the clot is in an unusual place. With a positive diagnosis, seeing a hematologist is a good place to start your coagulation therapy.

Blood test. If you're having symptoms of a blood clot they will test you, however you are able to be tested prior to that arising.

Your doctor will likely suspect factor V Leiden if you've had one or more episodes of thrombosis or pregnancy loss or if you have a strong family history of thrombotic disease. Your doctor can confirm that you have factor V Leiden with a blood test.

Two types of tests can be done:

1) Activated protein C resistance test. Your blood sample may be tested to determine whether your blood is resistant to activated protein C, one of the anti-clotting proteins that help control factor V. This is known as an activated protein C (APC) resistance assay. If your blood is resistant to activated protein C, you likely have a mutation in the factor V gene.

2) Genetic test. A genetic test is done to determine whether you have a factor V gene mutation. It may also be used to confirm the results of the APC resistance test or to determine whether you've inherited one or two copies of the gene mutation.

By a sime blood test