Definition

Deep Vein Thrombosis (DVT) is a medical condition where a blood clot (thrombus) forms in a deep vein, most commonly in the legs. It can partially or completely block blood flow.

Causes

• Prolonged immobility (e.g., long flights, bed rest)

• Surgery or trauma

• Obesity

• Pregnancy

• Smoking

• Certain medications (like oral contraceptives)

• Genetic clotting disorders

• Cancer and cancer treatments

Symptoms

• Swelling in one leg (rarely both)

• Pain or tenderness, often starting in the calf

• Warmth over the affected area

• Red or discolored skin

• Leg cramps (especially at night or while walking)

• In some cases, DVT can be asymptomatic

Risk Factors

• Age over 60

• Family history of DVT or PE

• History of blood clots

• Heart disease

• Varicose veins

• Hormone therapy or birth control pills

• Prolonged travel or immobility

Complications

• Pulmonary Embolism (PE): A potentially fatal condition when a clot breaks off and travels to the lungs.

• Post-thrombotic syndrome (PTS): Long-term pain, swelling, and even ulcers in the affected leg.

Diagnosis

• Doppler ultrasound (most common)

• D-dimer blood test

• Venography (rarely used)

• MRI or CT scan

Treatment

• Anticoagulants (blood thinners): Heparin, warfarin, rivaroxaban, apixaban

• Thrombolytics: Used in severe cases to dissolve clots quickly

• Compression stockings: Prevent swelling and complications

• Inferior vena cava (IVC) filter: For patients who cannot take blood thinners

• Lifestyle changes: Avoid smoking, manage weight, stay active

Prevention

• Regular movement during travel or prolonged sitting

• Compression stockings for at-risk individuals

• Staying hydrated

• Avoid crossing legs when sitting

• Post-surgical movement and physiotherapy

• Anticoagulant therapy for high-risk patients

Conclusion

DVT is a serious but preventable and treatable condition. Prompt diagnosis and appropriate treatment are vital to avoid complications such as pulmonary embolism. Awareness of risk factors and preventive measures is key to reducing the incidence of DVT.