A duplex ultrasound is often a non-invasive approach to detecting and quantifying the narrowing and blockage in the blood vessels. It's done by a qualified sonographer and is also confirmed by a Radiologist. It's really a painless process carried out on the couch and frequently will take 1-two several hours. https://sgvasculargrp.com/medical-condition/peripheral-arterial-disease/icon-peripheral-arterial-disease-pad-2-3/