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Deep Vein Thrombosis (DVT) Ultrasound Scan (One Leg)
185.00
A Deep Vein Thrombosis (DVT) Ultrasound Scan for one leg is a non-invasive duplex ultrasound used to detect blood clots in the deep veins of a single limb.
Turnaround time
1 day
Same-Day Appointments
UKAS Accredited Labs
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Under 18? Patients under 18 can only be seen at GB Medlabs and Clinilabs, Monday to Friday only.
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Details about Deep Vein Thrombosis (DVT) Ultrasound Scan (One Leg)
What is a Deep Vein Thrombosis (DVT) Ultrasound Scan (One Leg)?
A Deep Vein Thrombosis (DVT) Ultrasound Scan (One Leg) is a duplex Doppler ultrasound examination focused on the deep venous system of one lower limb. It evaluates vein compressibility, blood flow, and the presence of clots within the femoral, popliteal, and calf veins.
This scan is the first-line and gold-standard investigation for suspected DVT. It is painless, does not use radiation, and provides real-time information to support rapid clinical decisions. A one-leg scan is appropriate when symptoms are localised to a single limb.
Early diagnosis is crucial to reduce the risk of complications such as pulmonary embolism.
When a DVT Ultrasound Scan (One Leg) is recommended
A one-leg DVT ultrasound is recommended when symptoms or risk factors suggest deep vein thrombosis affecting one limb.
You may be referred for this scan if you:
- Have sudden swelling in one leg
- Experience calf or thigh pain or tenderness
- Notice redness or warmth in one leg
- Have pain after recent travel, surgery, or immobility
- Are pregnant or recently postpartum with one-sided symptoms
- Have a history of blood clots affecting one leg
- Require urgent exclusion of DVT on one side
- Need targeted follow-up of a previously affected limb
Benefits of a DVT Ultrasound Scan (One Leg)
- Accurate detection of blood clots
Gold-standard test for DVT diagnosis. - Targeted assessment of the affected limb
Focuses on one-sided symptoms. - Non-invasive and painless
No needles or radiation exposure. - Supports urgent clinical decision-making
Enables prompt treatment where required. - Assesses blood flow and vein compressibility
Identifies acute or chronic clot changes. - Safe and repeatable
Suitable for monitoring over time. - Reduces risk of serious complications
Early detection helps prevent embolism. - Performed by vascular ultrasound specialists
Ensures reliable, clinically useful results.
How the DVT Ultrasound Scan (One Leg) is performed
The scan is carried out by a trained vascular sonographer using ultrasound equipment.
- You will lie comfortably on an examination couch
- Ultrasound gel is applied to the affected leg
- A handheld probe is moved along the veins
- Gentle pressure is applied to assess vein compressibility
The scan usually takes 20–30 minutes, and you can resume normal activities immediately afterwards.
Understanding your DVT Ultrasound Scan results
No evidence of DVT
Veins are compressible with normal blood flow and no clot detected.
Typical report:
- No evidence of deep vein thrombosis
Acute DVT detected
A clot is identified within one or more deep veins, affecting blood flow.
Typical report:
- Acute deep vein thrombosis present
Urgent medical management is typically required.
Chronic or previous clot changes
Residual changes such as scarring or reduced elasticity may be seen.
Typical report:
- Chronic post-thrombotic changes noted
Results are interpreted alongside symptoms and clinical history.
How It Works
Simple steps to get your results
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Attend one of our UK or London clinics, arrange a home nurse visit, or use a finger-prick kit where available.
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Your sample is analysed by accredited UK laboratories, with secure results delivered directly to you.
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WhatsApp UsHow to Prepare for Your Test
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.
Frequently Asked Questions
A blood clot in a deep vein, usually in the leg.
Yes, suspected DVT should be assessed promptly.
No, it is painless.
No, ultrasound uses sound waves only.
When symptoms are limited to one limb.
Usually 20–30 minutes.
It is highly accurate for clinically significant DVT.
Results are prioritised due to clinical importance.
Yes, it is safe and repeatable.
You will be advised on urgent medical treatment and next steps.
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