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

1. Assesses blood flow in both legs
   Provides a complete picture of venous circulation.
2. Identifies faulty vein valves
   Detects venous reflux accurately.
3. Differentiates superficial and deep vein issues
   Essential for safe treatment planning.
4. Non-invasive and painless
   No needles, radiation, or injections.
5. Supports treatment decisions
   Guides compression, procedures, or monitoring.
6. Detects early venous disease
   Even before visible varicose veins appear.
7. Allows side-to-side comparison
   Useful when symptoms differ between legs.
8. 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.