This is a procedure where foam sclerosing agents are injected into the blood vessels. These mix with either air or carbon dioxide and applied into the vessels using mechanical pumps. Foam substances are much more effective for sclerosing blood vessels than liquid solutions, which is why they are often used for especially large or long vessels.
A condition for the successful sclerosing of varicose veins is the subsequent compression of the treated limb with a compress sock (second class). The physician determines how long the socks should be worn.