A Doppler Ultrasound, also known as a Doppler scan, is a special imaging test that measures the speed and direction of blood flow.

• Uses high-frequency sound waves.
• Detects changes in sound frequency as blood moves.
• Provides real-time images of circulation in different parts of the body.

👉 Think of it as an ultrasound with a focus on blood flow, not just organ structure.

Doctors recommend a Doppler test when they suspect problems with blood flow, such as:

• Blood clots (deep vein thrombosis – DVT).
• Narrowed or blocked arteries.
• Varicose veins.
• Reduced blood supply to organs.
• Monitoring pregnancy complications (placental blood flow).

📊 Studies show that Doppler ultrasound can detect vascular problems with an accuracy rate of over 90% in many conditions, making it a reliable diagnostic tool.

1. Color Doppler

• Uses different colors to show blood flow direction and speed.
• Helps visualize circulation clearly.

2. Power Doppler

• More sensitive than color Doppler.
• Detects even very small blood vessels.

3. Spectral Doppler

• Displays blood flow as a graph.
• Useful for measuring velocity and diagnosing blockages.

4. Continuous Wave Doppler

• Measures high-speed blood flow.
• Common in cardiology and vascular studies.

Step-by-step process:

1. You’ll lie on an exam table.
2. A gel is applied to the skin to help sound waves travel.
3. The technician moves a handheld device (transducer) over the area.
4. The Doppler machine records images and flow data in real time.

⏱️ Duration: Usually 30–60 minutes.

💡 Good news: The procedure is painless, safe, and radiation-free.