Factor V Leiden Mutation (Activated Protein C Resistance) – Plasma

Why This Test Might Be Ordered

Your doctor may recommend this test if you’ve had unexplained blood clots, a family history of clotting disorders, or if you’re considering pregnancy and have a history of recurrent miscarriages or clotting issues. It’s also used to evaluate patients with unexplained resistance to blood-thinning medications like warfarin.

What to Expect Before the Test

No special preparation is needed. You’ll have a small needle inserted into your arm to draw a blood sample. The test involves checking your plasma for the Factor V Leiden mutation, which is detected through genetic analysis.

What the Results Mean

If the test confirms the Factor V Leiden mutation, you may be at higher risk for blood clots. If it’s not present, your risk is likely normal, but other factors may still contribute to clotting. Discuss your results with your doctor to understand your personalized risk and next steps.

Common Symptoms or Conditions Linked to This Test

While this test doesn’t diagnose symptoms directly, it helps identify a genetic predisposition to conditions like deep vein thrombosis (DVT), pulmonary embolism, or recurrent pregnancy loss. Symptoms of clotting may include swelling, pain, or redness in the legs, chest pain, or shortness of breath.