A bilateral venous duplex scan is a noninvasive ultrasound test that evaluates blood flow and vein structure in both legs. It combines real-time gray-scale imaging with Doppler assessment to detect blood clots (deep vein thrombosis), venous reflux, obstruction, or venous insufficiency. Clinically, it helps diagnose causes of swelling, leg pain, varicose veins, guides treatment decisions, and monitors response to therapy.

A bilateral duplex scan is a noninvasive ultrasound that combines B‑mode imaging and Doppler assessment to evaluate blood vessel structure and flow on both sides of the body (commonly carotid arteries or leg veins). It detects blockages, narrowing, blood clots, or abnormal flow, helping diagnose vascular disease and guide treatment. The test is painless, real‑time, and widely used in vascular assessment.

A bilateral venogram usually takes about 30–60 minutes for the imaging itself; with preparation (consent, IV access) and brief post‑procedure observation, expect roughly one to two hours total. Complex anatomy, additional imaging, or interventions (for example, venoplasty) can lengthen the time. Your care team will give specific timing based on your condition and the facility’s protocols.

A duplex scan combines standard ultrasound imaging with Doppler blood-flow assessment to visualize blood vessel anatomy and measure flow speed and direction. It detects blockages, narrowing, clots, aneurysms and venous insufficiency, evaluates grafts and pre-operative vessel mapping, and monitors treatment. It is a non-invasive, painless test commonly used for carotid, peripheral arterial and venous evaluations.

A duplex scan is a non-invasive ultrasound that’s generally painless. Warm gel is applied and a handheld probe is moved over the skin; you may feel pressure or mild discomfort if the technician presses on a tender area or compresses veins. It uses no needles or radiation and is quick and safe. Rarely, preexisting pain may be temporarily aggravated during the exam.

Costs for a duplex ultrasound vary widely by country and provider: in the United States it typically ranges from about $200 to $1,500, in the United Kingdom private scans often cost £100–£400 while public systems may provide it free when clinically indicated, and in India prices commonly fall between ₹800 and ₹5,000. Final price depends on exam type, location, imaging center, and insurance coverage.