Ultrasound vascular testing, also known as vascular ultrasound or duplex ultrasound, is a non-invasive diagnostic technique that employs high-frequency sound waves to create real-time images of blood vessels and assess blood flow. This valuable tool in vascular medicine provides both structural information through B-mode ultrasound, allowing the visualization of vessel structure and any abnormalities, as well as functional data through Doppler ultrasound, which enables the measurement of blood velocity and direction. It plays a crucial role in diagnosing and monitoring various vascular conditions, including deep vein thrombosis, peripheral artery disease, carotid artery disease, and aneurysms, aiding healthcare professionals in making informed decisions about patient care and treatment options.