What is a Peripheral Arterial Doppler Ultrasound and ABPI – Two Limbs?

A Peripheral Arterial Doppler Ultrasound and ABPI – Two Limbs is a comprehensive vascular assessment that evaluates the arterial circulation in both lower limbs.

The Doppler ultrasound uses sound waves to assess blood flow within the leg arteries, identifying narrowing (stenosis), blockages, or reduced circulation. The Ankle-Brachial Pressure Index (ABPI) compares blood pressure measurements at the ankles and arms to quantify how well blood is reaching the legs.

Combining Doppler imaging with ABPI provides both visual and numerical assessment, making this investigation a key diagnostic tool for peripheral arterial disease (PAD) and overall limb vascular health.

When a Peripheral Arterial Doppler and ABPI – Two Limbs is recommended

This assessment is recommended when there are symptoms or risk factors suggesting reduced arterial circulation in the legs.

You may be referred for this scan if you:

• Experience leg pain when walking (intermittent claudication)
• Have cold feet or colour changes in both legs
• Have slow-healing wounds or ulcers on the legs or feet
• Have diabetes with suspected circulation issues
• Have a history of smoking or cardiovascular disease
• Have reduced or absent foot pulses
• Require assessment before vascular treatment
• Need monitoring of known arterial disease in both limbs

Benefits of a Peripheral Arterial Doppler Ultrasound and ABPI – Two Limbs

• Assesses arterial blood flow in both legs
  Provides a full bilateral circulation assessment.
• Detects arterial narrowing or blockages
  Identifies peripheral arterial disease accurately.
• Includes objective ABPI measurements
  Quantifies severity of circulation impairment.
• Non-invasive and painless
  No needles or radiation exposure.
• Supports early diagnosis of PAD
  Enables timely management and prevention.
• Guides treatment and lifestyle decisions
  Helps inform medical or vascular care plans.
• Safe and repeatable
  Suitable for follow-up and monitoring.
• Widely used in vascular and diabetic care
  A standard investigation in arterial assessment.

How the Peripheral Arterial Doppler and ABPI test is performed

The assessment is performed by a trained vascular sonographer using ultrasound and blood pressure equipment.

• You will lie comfortably on an examination couch
• Ultrasound gel is applied to the legs
• A probe is used to assess arterial blood flow
• Blood pressure cuffs are placed on the arms and ankles
• ABPI values are calculated from pressure readings

The procedure usually takes 30–45 minutes, and you can resume normal activities afterwards.

Understanding your Peripheral Arterial Doppler and ABPI results

Normal arterial circulation

Blood flow is normal and ABPI values fall within the healthy range.

Typical findings:

• ABPI approximately 1.0–1.3

Mild to moderate arterial disease

Reduced blood flow or lower ABPI values indicate partial arterial narrowing.

Typical findings:

• ABPI approximately 0.5–0.9

This may require monitoring and cardiovascular risk management.

Severe arterial disease

Significantly reduced flow and low ABPI values suggest advanced peripheral arterial disease.

Typical findings:

• ABPI below 0.5

Further vascular assessment or treatment may be recommended.