Duplex ultrasound combines two complementary technologies: B-mode ultrasound imaging that produces real-time anatomical pictures of the vessels, and Doppler ultrasound that measures the velocity and direction of blood flow within them. This combination makes it the most accurate, non-invasive, radiation-free investigation available for diagnosing venous and arterial disease.

What Can Venous Duplex Reveal?

  • Varicose vein mapping: Identifies which specific veins are incompetent, the location and extent of reflux, and the source of the venous leak — essential for planning laser or sclerotherapy treatment
  • Deep Vein Thrombosis (DVT): Directly visualizes the thrombus inside the vein with high accuracy — the primary diagnostic test
  • Chronic venous insufficiency staging: Assesses valve function and degree of reflux
  • Post-treatment assessment: Confirms complete vein closure after laser ablation or sclerotherapy

Arterial Duplex Applications

  • Ankle-Brachial Index (ABI) measurement for PAD diagnosis
  • Carotid artery stenosis assessment
  • Surveillance of post-operative bypass grafts and endovascular interventions
  • Dialysis fistula assessment

What Happens During the Examination?

  1. The patient lies on the examination couch — sometimes asked to stand to demonstrate venous reflux
  2. Ultrasound gel is applied to the skin for good contact
  3. The probe is moved systematically along the leg from groin to ankle
  4. Colour flow Doppler maps the direction and velocity of blood flow in real-time
  5. A complete bilateral venous study takes approximately 30–40 minutes
  6. Results are available immediately

✅ No Preparation Required

No fasting, no contrast injections, no radiation. Wear loose-fitting clothing that allows easy access to both legs. The examination is entirely painless and has no side effects.

Accuracy and Importance

Venous duplex ultrasound performed by a specialist vascular physician has a sensitivity and specificity exceeding 95% for DVT diagnosis and is superior to clinical examination alone. Without it, treatment plans for varicose veins risk being incomplete or incorrectly targeted — leading to treatment failure or recurrence.

⚠️ Who Performs the Scan Matters

The quality of venous Duplex is heavily operator-dependent. Dr. Haggag performs and personally interprets all Duplex studies at the time of consultation — ensuring immediate, accurate diagnosis and same-session treatment planning.

Need a Venous Duplex Ultrasound?

Book your appointment with Dr. Mohamed Haggag for an expert venous Duplex assessment with immediate results and a clear treatment plan

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