Suspected Blood Clot or Pulmonary Embolism — Seek Emergency Care
Sudden severe leg swelling with chest pain or shortness of breath may indicate pulmonary embolism — call 911 immediately. Acute severe unilateral leg swelling, pain, warmth, and redness may require prompt ER or urgent care evaluation. Do not use DOD to manage suspected acute DVT or PE.
Venous Doppler Ultrasound: What Patients Should Know
Venous Doppler ultrasound (venous duplex ultrasound) uses sound waves and Doppler flow measurement to evaluate the veins — most commonly the leg veins — for blood flow and the presence of thrombus (blood clot). It does not use ionizing radiation.
Educational content only. Acute DVT or PE symptoms require emergency evaluation. DOD does not perform or interpret venous Doppler ultrasound studies.
Quick Answer
Venous Doppler ultrasound combines grayscale imaging with Doppler flow assessment to evaluate veins — primarily leg veins — for thrombosis (clot) and blood flow characteristics. Key assessments include vein compressibility (non-compressible veins suggest thrombus), Doppler waveforms, and augmentation response. No radiation is involved. Provider orders are required. For suspected acute DVT or symptoms of pulmonary embolism, seek emergency evaluation — do not use DOD.
What Venous Doppler Ultrasound Evaluates
Lower Extremity Veins (Bilateral or Unilateral)
Common femoral, femoral, popliteal, and tibial veins — the primary DVT evaluation study
Vein Compressibility
Normal veins fully collapse with probe pressure; non-compressible veins suggest intraluminal thrombus
Doppler Waveforms and Flow
Phasic flow with respiration, flow direction, augmentation with distal compression
Upper Extremity Veins
Subclavian, axillary, brachial, basilic, cephalic veins — for upper extremity DVT evaluation
Portal and Hepatic Veins
Abdominal venous Doppler may include portal vein, hepatic veins, and IVC
Aortoiliac (Limited)
Proximal iliac veins may be assessed with transabdominal technique when accessible
Frequently Asked Questions
Sources
- Vascular Ultrasound — Patient Information — RadiologyInfo.org (ACR / RSNA)
- Deep Vein Thrombosis — MedlinePlus (NIH)
- DVT — American Society of Hematology — American Society of Hematology (ASH)
Related Education and Order Pages
Need a Provider Review for Venous Doppler Ultrasound?
$40 virtual provider review for non-emergency venous Doppler order requests.
For acute DVT or PE symptoms — seek emergency evaluation. Do not use DOD.
Start Virtual Consult — $40Not for emergencies. Orders not guaranteed.
Educational content only. DOD does not perform or interpret venous Doppler ultrasound studies. Suspected DVT or pulmonary embolism requires prompt medical evaluation.