CHIVA method is a type of surgery used to treat varicose veins that occur as a result of long term venous insufficiency.
[1] The term is a French acronym for Conservatrice Hémodynamique de l'Insuffisance Veineuse en Ambulatoire (ambulatory conservative hemodynamic treatment venous insufficiency).
The method is based on the assumption that the symptoms of varicose veins are mainly the expression of an hemodynamic circulatory disorder, induced by various venous system malfunctions.
The CHIVA method is also equivalent to either radio frequency ablation or endovenous laser therapy regarding recurrence and side effects.
[1] But a subsequently published network meta-analysis of 39 RCTs on 6917 limbs showed the greatest long-term efficacy of the method, as well as the lowest recurrence rate.