Blood Clot Risk Blood Test

What is Venous Thromboembolism?

Venous thromboembolism (VTE) is a condition where blood clots form in the veins, including deep vein thrombosis (DVT) and pulmonary embolism (PE). It is caused by genetic mutations like Factor V Leiden and deficiencies in natural anticoagulant proteins such as Protein S that regulate blood clotting. The Factor V Leiden Mutation Analysis is the most important test for diagnosis because it identifies the most common inherited risk factor for dangerous blood clots.

RECOMMENDED TEST Factor V (Leiden) Mutation Analysis
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What causes venous thromboembolism?

Venous thromboembolism is caused by genetic mutations and protein deficiencies that make blood clot too easily. The Factor V Leiden mutation is the most common inherited cause, affecting how your blood responds to natural anticoagulants and making clots form more readily in your veins. Deficiencies in natural clotting regulators like Protein S and Protein C also contribute to abnormal clot formation, creating a hypercoagulable state where your blood is more prone to dangerous clotting in deep veins or lungs.

What is the best test for venous thromboembolism?

The Factor V Leiden Mutation Analysis is the most important test for venous thromboembolism because it detects the single most common inherited clotting disorder, present in up to 5% of the population. This genetic test identifies whether you carry the mutation that causes your blood to clot excessively, substantially increasing your risk for DVT and PE. The Protein S Antigen, Free test is also essential because it measures levels of this critical natural anticoagulant protein—low levels significantly increase thrombosis risk by reducing your body's ability to prevent inappropriate clot formation. Together, these tests identify the underlying genetic and protein abnormalities that predispose you to life-threatening blood clots.

When should I get tested for venous thromboembolism?

You should get tested if you have experienced unexplained blood clots, especially before age 50, or have had recurrent clotting episodes without obvious triggers. Testing is also important if you have a family history of blood clots, DVT, or pulmonary embolism, as these genetic conditions often run in families. You should also consider testing if you developed a blood clot during pregnancy, while taking birth control pills, or in unusual locations like your arms or abdomen, as these situations suggest an underlying clotting disorder that needs identification for proper prevention and treatment planning.

What are the symptoms of venous thromboembolism?
Venous thromboembolism symptoms depend on where the clot forms in your body. Deep vein thrombosis typically causes swelling, pain, warmth, and redness in your leg, usually in the calf or thigh, though you might not notice any symptoms at all. Pulmonary embolism occurs when a clot travels to your lungs and causes sudden shortness of breath, chest pain that worsens with breathing, rapid heart rate, coughing up blood, and lightheadedness. These symptoms require immediate medical attention as PE can be life-threatening if not treated promptly.
Who is at risk for venous thromboembolism?
People with inherited clotting disorders like Factor V Leiden mutation, Protein S deficiency, or Protein C deficiency face significantly elevated risk for venous thromboembolism. Other risk factors include prolonged immobility from long flights or bed rest, recent surgery especially orthopedic procedures, pregnancy and the postpartum period, cancer and chemotherapy treatments, hormone therapies including birth control pills and hormone replacement therapy, obesity, smoking, and advanced age. Having a family history of blood clots increases your risk substantially, as many thrombophilia conditions are genetic and passed down through families.
What happens if venous thromboembolism is left untreated?
Untreated venous thromboembolism can lead to life-threatening complications and long-term health problems. A clot in your leg can break loose and travel to your lungs, causing pulmonary embolism which can be fatal if it blocks major blood vessels. Chronic DVT can damage vein valves, leading to post-thrombotic syndrome with persistent leg pain, swelling, skin discoloration, and ulcers that significantly impact your quality of life. Recurrent clots become more likely without proper diagnosis and treatment, and each episode increases your risk for further complications including permanent lung damage from repeated pulmonary emboli.
Can venous thromboembolism be diagnosed with a blood test?
Blood tests cannot directly diagnose an active blood clot—imaging studies like ultrasound or CT scans are needed for that. However, blood tests are essential for identifying your underlying risk factors and genetic predisposition to clotting disorders. The Factor V Leiden Mutation Analysis and Protein S Antigen test reveal whether you have inherited or acquired conditions that make you prone to developing VTE, helping your doctor assess your thrombosis risk and make decisions about prevention strategies, anticoagulation duration, and screening for family members who may carry the same genetic mutations.
How is venous thromboembolism treated?
Venous thromboembolism is treated primarily with anticoagulant medications that thin your blood and prevent clots from growing or new ones from forming. Initial treatment often involves heparin or low-molecular-weight heparin, followed by oral anticoagulants like warfarin or newer direct oral anticoagulants (DOACs) for several months or longer depending on your risk factors. If you have an inherited clotting disorder identified through genetic testing, you may need lifelong anticoagulation therapy. In severe cases, clot-busting drugs or surgical procedures to remove large clots may be necessary, and compression stockings help prevent post-thrombotic syndrome and manage leg swelling.
How can I prevent venous thromboembolism?
Prevention strategies depend on your individual risk factors identified through genetic testing and medical history. Stay active and avoid prolonged sitting—move around every hour during long flights or car trips, and do ankle exercises if you must sit for extended periods. Maintain a healthy weight, stay hydrated, and quit smoking as these factors significantly impact clotting risk. If you have Factor V Leiden or Protein S deficiency, discuss hormone-based medications with your doctor as birth control pills and hormone replacement therapy can dangerously increase clot risk. After surgery or during hospitalization, your doctor may prescribe preventive anticoagulation, and compression stockings can help keep blood flowing properly in your legs.
What can I do at home for venous thromboembolism?
While home remedies cannot treat blood clots themselves, certain lifestyle measures support your treatment and reduce recurrence risk. Elevate your legs when sitting or lying down to improve blood flow and reduce swelling, and wear compression stockings as prescribed by your doctor. Stay physically active with regular walking and leg exercises to keep blood circulating, but avoid activities that could cause injury while on blood thinners. Maintain proper hydration, eat a consistent diet if taking warfarin (as vitamin K intake affects dosing), and monitor for signs of bleeding or new clots. Always take anticoagulant medications exactly as prescribed and attend all follow-up appointments for blood monitoring.
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Just text or call us at 754-799-7833, email us at support@privatemdlabs.com, and we'll gladly help you. We've got your back and reply quickly.
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Just reach out to us via text at 754-799-7833 or shoot us an email at support@privatemdlabs.com. Remember to include your order number and let us know the correct information you’d like to update. Our awesome team will jump right in and make sure everything is sorted out and accurate for you.

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If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com.
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We get it – sometimes your needs change.

As long as your samples haven’t been collected yet, we’re happy to help you cancel your order.

If you have any further questions, please text us at 754-799-7833 or email support@privatemdlabs.com.

You can read more about our cancellation policy here.
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If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com and we'll gladly help you.
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Factor V (Leiden) Mutation Analysis
Google reviews 505 reviews
$1,031 $804
What's included
Fast & easy, results by email & SMS
No need to visit a doctor
Private & confidential
No insurance needed
Results explained
No extra fees paid at the lab

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