Endovenous Thermal Ablation (RFA/EVLA)
Relative contraindications include inappropriate vein size, with veins <2 mm and >15 mm representing potential contraindications for RFA specifically. [1] A history of superficial thrombophlebitis resulting in a partially obstructed saphenous vein may preclude thermal ablation. [1] Significant tortuosity of the GSV on duplex examination can make catheter delivery difficult.