Duplex Scan for Chronic Venous Insufficiency (CVI)

In the presence of varicose veins, obstruction or damage to the deep veins, an ultrasound scan of the leg is used to identify the blockages or backward flow of blood before medical treatment.

Information for doctors
Duplex scanning with colour flow imaging can detect the presence and anatomic extent of obstruction and reflux. It can demonstrate the variable anatomy of the popliteal fossa and determine the sites of incompetent perforating veins.

Indications
- To determine the sites of deep to superficial reflux. This is essential in patients with recurrent varicose veins.
- To exclude significant reflux or occlusion of deep veins when suspected in patients who are candidates for varicose vein surgery.
- To establish the diagnosis of post thrombotic syndrome
- Preoperative marking of the sapheno-popliteal junction
- Preoperative marking of incompetent perforating veins

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