How is foam sclerotherapy performed?
A needle is inserted into the main affected superficial vein, usually under ultrasound guidance. Sclerosant foam is then injected and monitored using ultrasound. Once the foam has filled the main superficial vein, the upper end of the vein may be compressed to prevent entry of foam into the deeper veins. The foam causes inflammation of the vein wall, obliteration of the vein’s lumen and vein occlusion. Further injections may be given during the same or different sessions to make sure that all the varicose veins have been completely filled.
