Prospective, multicenter, randomized, parallel-controlled, non-inferior clinical trial of the efficacy and safety of the Venous closure system for the treatment of varicose great saphenous veins

INTERVENTION: Experimental group:Venous closure system ;Control group:Intravascular radiofrequency closure system; CONDITION: Varicose great saphenous veins of lower extremities PRIMARY OUTCOME: Rate of main saphenous vein occlusion 3 months after surgery; SECONDARY OUTCOME: Instrument performance evaluation;Success rate of treatment of great saphenous vein occlusion;Great saphenous vein main treatment site pain score;VCSS scores improve the situation;Success rate of device;Ecchymosis score of main saphenous vein treatment site;Great saphenous vein occlusion rate 1 month after surgery;The great saphenous vein was occluded 6 months after surgery;The great saphenous vein was occluded 12 months after surgery; INCLUSION CRITERIA: (1) No gender limitation, age 18‐75 (including 18 and 75 years old); (2) Patients currently diagnosed with varicose great saphenous veins; (3) The CEAP (Clinical, Etiologic, Anatomic, and Pathophysiologic) grading of varicose veins was C2‐C5; (4) Agree to participate in the clinical trial and sign the informed consent voluntarily.