The duplex scanner, consists of an ultrasound probe which emits short pulses of very high frequency sound, (far higher than the ear can hear), and can measure the size of the veins and arteries as well as blood flow. The scanner probe is applied to the skin using a special water soluble gel that allows for optimal contact. By angling the probe in different directions, structures beneath the skin can be identified and scanned.
A highly useful tool, duplex ultrasound scans can be done as outpatient tests and may prevent the need for x-rays in many patients.
Please closely follow your physician’s guidance on what to eat or drink prior to this procedure.