Understanding Your Vascular Ultrasound and Doppler Results: A Patient Guide for Ontario
Updated: 3 days ago
If you have leg swelling, aching, visible varicose veins, skin changes, or other signs of poor circulation, your doctor may suggest a vascular ultrasound. It is one of the most common tests used to look at the veins in the legs, and it is painless and does not use radiation. Still, the report that comes out of it can be hard to read. It is full of abbreviations, measurements, and terms that are not always explained in plain language.
This guide, prepared by the team at VeinCentre under the direction of Dr. Luis Figueroa, a vascular surgeon, explains what a Doppler or Duplex ultrasound is, what common report terms mean, which symptoms need urgent attention, and what happens next. It is general information. Only your own doctor can interpret your own results.
Key Takeaways
A vascular Doppler ultrasound uses sound waves, not radiation, to look at blood vessels and the way blood moves through them.
Vein studies look for valves that are not working well (reflux) and for blood clots. Artery studies look for narrowing.
Terms such as reflux, non-compressible vein, and stenosis help your doctor decide what kind of care you need.
At VeinCentre, your consultation is covered by OHIP for eligible patients, and no referral is needed to book. If you need a Doppler ultrasound, we give you the referral, and the scan is covered by OHIP at an imaging lab.
What Is a Vascular Doppler Ultrasound?
A vascular ultrasound uses high frequency sound waves to create live images of blood vessels. Duplex ultrasound combines a standard image of the vein with Doppler, which shows the direction and speed of blood flow. Together, they show both what the vein looks like and how blood is actually moving through it.
The test does not involve needles, contrast dye, or sedation. A gel is applied to the skin, and a handheld probe is moved over the leg. For a vein study, you may be asked to stand or sit for part of it, because gravity makes it easier to see whether blood is flowing the wrong way.
What Is the Difference Between Vein and Artery Studies?
Venous ultrasound: Looks at the veins that carry blood back to the heart. It checks the valves and looks for clots.
Arterial ultrasound: Looks at the arteries that carry blood to the legs and feet. It checks for narrowing and is usually ordered when artery disease is suspected.
Your doctor chooses the right study based on your symptoms. Swelling and visible varicose veins usually point toward a vein study, while leg pain when walking or cold, pale feet are more likely to lead to an artery assessment.
Key Terms in Your Vascular Ultrasound Report
Your report may include several terms that are not obvious at first glance:
Venous reflux or incompetence: In healthy veins, small one way valves keep blood moving upward. When the report mentions reflux, it means some valves are leaking and blood is flowing backward and pooling in the lower leg.
Reflux time: How long blood flows backward after the leg muscles relax. Your doctor interprets this measurement along with the rest of the study.
Deep vein thrombosis (DVT): A blood clot in a deep vein of the leg. It needs prompt medical attention.
Non-compressible vein: A healthy vein flattens under light pressure from the probe. A vein that does not may contain a clot.
Arterial stenosis: Narrowing of an artery, which can limit blood flow to the leg.
Saphenous veins: The long veins that run along the leg. They are often the source of reflux in varicose veins.
What Do Common Report Findings Generally Mean?
The table below is a general guide and not a diagnosis. Your doctor will explain what your own findings mean.
Report finding | What it generally means | Why it matters |
Venous reflux | Valves in a vein are not closing properly | Often linked to varicose veins, swelling, and heaviness |
Non-compressible segment | The vein does not flatten under pressure | May suggest a clot, which needs prompt follow-up |
Arterial narrowing | An artery is narrower than expected | May reduce blood flow to the leg and needs its own assessment |
Normal study | No reflux or clot found | Symptoms may have another cause that your doctor can explore |
Which Symptoms Need Urgent Attention?
Not every case of leg swelling or vein change is urgent. Noticing how symptoms change over time can help you decide when it is time to book an assessment. Photographing visible veins now and then, and noting when symptoms get worse, for example after travel or long periods of standing, gives your doctor useful information.
Some signs need medical attention sooner:
Sores on the lower leg or ankle that are slow to heal
Skin that keeps darkening or thickening around the ankle
Sudden pain, redness, or warmth along a vein
Sudden swelling in one leg, especially with pain, which can be a sign of a clot
If you have sudden swelling in one leg with pain, or shortness of breath or chest pain, seek urgent medical care or go to an emergency department right away.
What Is the CEAP Classification?
Vein specialists often use the CEAP system to describe how far venous disease has progressed. The clinical part of it, from C0 to C6, is the one that comes up most often in consultations.
Class | What it describes | What you may notice |
C0 | No visible signs of venous disease | Aching or heaviness without visible veins |
C1 | Spider veins or small surface veins | Fine visible veins |
C2 | Bulging veins, often with reflux underneath | |
C3 | Leg or ankle swelling that tends to build up through the day | |
C4 | Darkening, eczema, or thickening of the skin | |
C5 | Healed ulcer | Skin changes with an ulcer that has closed |
C6 | Active ulcer | An open sore that is not healing, which needs prompt care |
Your doctor will explain where you fall in this system and what it means for your care.
How Does the Assessment Work at VeinCentre?
At VeinCentre, the assessment starts with a consultation with Dr. Luis Figueroa. He reviews your symptoms, examines your legs, and decides whether a Doppler ultrasound is needed. If it is, VeinCentre gives you the referral, and you can have the scan done at an imaging lab. The consultation is covered by OHIP for eligible patients, and no referral is needed to book it. The Doppler ultrasound is also covered by OHIP when it is done with a referral. If you already have a recent ultrasound report, bring it with you so your doctor can take it into account.
What Happens After the Ultrasound?
Based on your results, your doctor may recommend conservative care, such as compression stockings and lifestyle changes, or a minimally invasive treatment.
Depending on what the scan shows, the options may include:
Radiofrequency Ablation (RFA) for veins with reflux
VenaSeal™ glue ablation for veins with reflux
Sclerotherapy for spider veins and small varicose veins
Treatment is only recommended after your scan and consultation. If a problem with the arteries is suspected, your doctor will explain what further testing or referral is appropriate.
What Does It Cost?
Your consultation is covered by OHIP for eligible patients. If an ultrasound is needed, the Doppler scan is covered by OHIP at an imaging lab with a referral from VeinCentre. Sclerotherapy is $300 plus HST per session, or 3 sessions for $750 plus HST. The price of RFA and VenaSeal™ is confirmed after your consultation. VeinCentre also offers Medicard financing through iFinance Canada, with payments from $22 per week over 12 to 72 months, no down payment, and no penalty for early payment. You can read more in our guide to varicose vein treatment costs and OHIP coverage in Ontario.
Frequently Asked Questions
How long does a leg Doppler ultrasound take?
The time depends on the area being examined and whether one or both legs are checked. The test is painless and does not need needles, contrast dye, or sedation.
What does venous reflux mean on my report?
It means the one way valves in a leg vein are not closing well, so blood can flow backward and pool in the lower leg. It is a common cause of varicose veins and swollen, heavy legs.
Does a normal ultrasound mean my symptoms are not real?
No. A normal study means that no reflux or clot was found. Your symptoms can still have other causes, and your doctor can help you find out what they are.
Do I need to prepare for the test?
Your clinic will tell you if you need to prepare. In general, wearing loose, comfortable clothing that is easy to move out of the way makes the exam easier.
What happens after my results are reviewed?
Your doctor will explain the findings and recommend either conservative care or a treatment that fits your veins. You decide what to do next.
Where do I get the ultrasound done?
If Dr. Figueroa recommends a Doppler ultrasound, VeinCentre gives you the referral, and you can have the scan done at an imaging lab. The scan is covered by OHIP with that referral.
Do I need a referral?
No referral is needed to book a consultation. You can book directly with VeinCentre by calling (289) 809-1333. If the doctor recommends a Doppler ultrasound, VeinCentre gives you the referral.
Take the Next Step
If you have symptoms or a report you would like explained, a consultation is the best place to start.
Book your assessment: Call (289) 809-1333. Your consultation is covered by OHIP for eligible patients, and no referral is needed to book. If an ultrasound is recommended, we provide the referral.
Locations: VeinCentre North York and VeinCentre Richmond Hill, Ontario
Medical Director: Dr. Luis Figueroa, Vascular Surgeon (FRCSC)
Disclaimer: The information in this guide is for education only and does not replace personal medical advice. If you have sudden swelling in one leg, severe pain, or redness, contact your doctor or go to an emergency department right away.
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