The examination everything depends on
Vein treatment without a map is guesswork, and expensive guesswork. The visible vein on the surface of the calf is frequently not the problem — it is the consequence of a valve that failed somewhere higher up, often in a vein you cannot see at all. Treat the visible one and leave the source, and it returns.
A venous duplex ultrasound answers, specifically: which veins are refluxing, for how long, over what length, and how big they are. From that, and only from that, comes a treatment plan.
What happens
You stand on a small platform. The examiner applies gel and passes a probe along the leg, following the venous system from the groin down. At each segment they compress the calf and release it, and watch what the blood does when the squeeze stops. In a healthy vein the valve closes and flow stops. In an incompetent one, blood falls back down, and the duration of that backflow is measured — beyond about half a second is the usual threshold for calling a valve incompetent.
Both legs are usually examined, because vein disease is rarely tidy about staying on one side. It takes around thirty minutes.
What you get at the end of it
A conversation, not a report posted three weeks later. Dr. D’Alessio goes through what was found: which veins are the problem, whether that explains your symptoms, and what the options are.
That last part includes the option of doing nothing. Plenty of people have visible veins that are not refluxing and not causing their symptoms, and some people’s aching legs turn out to be an orthopaedic or arterial problem rather than a venous one. Being told that clearly is a better outcome than a course of treatment that was never going to help.
Why insurers ask for it
Because it is the evidence that distinguishes a medical vein problem from a cosmetic one. Most plans require documented reflux on duplex ultrasound, plus symptoms, before approving treatment of a varicose vein — and many require a period of compression therapy as well. The scan is therefore both the clinical starting point and the administrative one, and we will tell you what your particular plan requires before the appointment rather than after it.