This is technique whereby small amounts of medications are injected directly in
to the varicose veins. The acidic nature of the sclerosant medication acts on the
inner vein valve, causing spasm of the vein and subsequent closure of the vein.
The sclerosant medicine can be used in various concentrations depending on the diameter
of the treated vein. It can be injected either in the liquid form, or by preparing
a foam preparation using air or carbon dioxide. It is injected via tiny needles
into the veins, either by direct visualization, or under the guidance of ultrasound
in cases of deeper veins.
The commonly used drugs are Sodium Tetradecyl Sulphate or Polidocanol.