What is a colour Doppler scan?
Colour Doppler is a type of ultrasound that shows blood moving through arteries and veins. The flow appears in colour on the screen, so the doctor can see its direction and speed.
Like all ultrasound, it uses sound waves, not radiation.
Types we offer
- Leg (lower limb) (veins and arteries, one or both legs)
- Arm (upper limb)
- Carotid (the arteries in the neck)
- Scrotal
- Umbilical and fetal (in pregnancy)
Why doctors request it
- Leg swelling or a suspected blood clot (DVT)
- Varicose veins
- Leg pain on walking, or poor circulation
- Checking the neck arteries, for example after a stroke or mini-stroke
- Scrotal pain or swelling, or varicocele
- Checking the baby's blood supply in pregnancy
How to prepare
- Most arm, leg and neck scans need no preparation.
- Wear loose clothing that is easy to remove from the area.
- Bring your doctor's request and any previous reports.
Not sure how to prepare? Message us on WhatsApp before you come.
This is general information. Always follow your own doctor's advice.
What happens during the visit
You lie on a couch, or sometimes stand for leg vein scans. Gel is applied and the probe is moved along the vessels. You may hear the sound of blood flow from the machine. This is normal.
Common questions
Is a Doppler scan painful?
No. You may feel light pressure from the probe, especially over a swollen area.
What is the whooshing sound?
The machine turns the blood flow into sound. It helps the doctor assess the vessels.