Varicose Vein – Two Limbs
A Varicose Vein Scan for two limbs is a specialised duplex ultrasound that evaluates blood flow and vein function in both legs, helping diagnose venous insufficiency and varicose veins.
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Details about Varicose Vein – Two Limbs
What is a Varicose Vein Scan for Two Limbs?
A Varicose Vein Scan – Two Limbs is a duplex Doppler ultrasound examination of the venous system in both legs. It assesses how blood flows through the superficial and deep veins, identifying faulty valves (venous reflux), vein enlargement, and circulation problems.
This scan is the gold standard investigation for varicose veins. It is non-invasive, painless, and uses sound waves rather than radiation. Imaging both limbs provides a comprehensive comparison, as venous disease often affects both legs, even if symptoms are more noticeable on one side.
The results help guide treatment decisions, monitor disease progression, and rule out deeper venous issues.
When a Varicose Vein Scan is recommended
A two-limb varicose vein scan is recommended when there are symptoms or visible signs of venous disease in one or both legs.
You may be advised to have this scan if you:
- Have visible varicose or spider veins
- Experience leg heaviness, aching, or throbbing
- Notice ankle swelling, especially later in the day
- Have skin changes or discolouration around the ankles
- Experience leg cramps or restlessness
- Have a history of venous disease
- Are being assessed before vein treatment
- Need follow-up or comparison of both legs
Benefits of a Varicose Vein Scan – Two Limbs
- Assesses blood flow in both legs
Provides a complete picture of venous circulation. - Identifies faulty vein valves
Detects venous reflux accurately. - Differentiates superficial and deep vein issues
Essential for safe treatment planning. - Non-invasive and painless
No needles, radiation, or injections. - Supports treatment decisions
Guides compression, procedures, or monitoring. - Detects early venous disease
Even before visible varicose veins appear. - Allows side-to-side comparison
Useful when symptoms differ between legs. - Safe and repeatable
Can be used for monitoring over time.
How the Varicose Vein Scan is performed
The scan is performed by a trained vascular sonographer using ultrasound equipment.
- You will usually be examined standing and lying down
- A small amount of gel is applied to the skin
- A handheld probe is moved along the legs
- Gentle pressure or breathing techniques may be used to assess valve function
The scan typically takes 30–45 minutes and you can resume normal activities immediately afterwards.
Understanding your Varicose Vein Scan results
Normal venous function
Blood flows efficiently toward the heart with no valve leakage.
Typical report:
- No evidence of venous reflux
Venous reflux (valve incompetence)
Blood flows backwards due to faulty vein valves, contributing to varicose veins.
Typical report:
- Superficial venous reflux detected
Combined or deep vein findings
The scan may show involvement of both superficial and deep veins, or previous clot-related changes.
Typical report:
- Deep or combined venous insufficiency noted
Results are interpreted alongside symptoms to determine the most appropriate management plan.
How It Works
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Follow these guidelines for accurate results
Sample Timing
Where possible, attend your blood test between 7am and 12pm. Please wait until any short-term illness or infection has fully resolved before testing. Avoid intense exercise for 24–48 hours beforehand, as this can affect certain markers.
Fasting & Hydration
Fasting is not always required, but some tests may recommend it. If fasting is advised, avoid food for 8–12 hours before your appointment and drink water only. Stay well hydrated, as this helps with sample collection and accuracy.
Medications & Supplements
Continue prescribed medications unless advised otherwise by your clinician. Avoid vitamin, mineral, or biotin supplements for at least 24–48 hours before your test, as these can interfere with results. If you are unsure about any medication or supplement, please let us know before your appointment.
Hormones & Menstrual Cycle
For hormone-related tests, timing within your menstrual cycle may be important. If relevant, follow any specific guidance provided on your test page.
If you have any questions or special circumstances, our team is happy to advise before your appointment.