Study on Treatment of Varicose Veins by Endovenous Laser (1940 nm vs 1470 nm) (NEWWAVE)

Inclusion Criteria: Primary insufficiency of the great saphenous vein (GSV) and/or small saphenous vein (SSV) Patient candidate for endothermic treatment of the lower limbs CEAP: C2 - C6 Patient with a target vein diameter (GSV and/or SSV) >= 3 mm throughout the target vein segment Patient affiliated or beneficiary of a social security scheme Patient having signed the informed consent Exclusion Criteria: Patient with a current serious pathology and/or a life expectancy of less than 5 years Patient who has had a deep or superficial vein thrombosis in the previous 6 months Obliterating arteriopathy of the lower limb concerned, with an IPS < 0.8 or > 1.3 Patient with post-thrombotic obstructive syndrome at the popliteal and/or femoral and/or iliac stage on the ipsilateral lower limb Patient with primary or post-thrombotic axial deep venous reflux on the ipsilateral lower limb Suspicion of non-post-thrombotic iliac compression on echo-doppler Contraindication to the planned treatment technique Patient whose geographical distance is not compatible with the follow-up of the study Pregnant or breastfeeding women Patient linguistically or psychologically unable to understand the information given, to give informed consent or to answer the study questionnaires. Protected patients: Adults under guardianship, or other legal protection; Hospitalized without consent.