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Purpose: The aim of this study was to evaluate the clinical effects of the Trivex system in the treatent of primary severe superficial varicose veins of the lower extremity and compare Trivex to the point-form-stripping combined with foam sclerotherapy (FS).Methods: A total of 64 patients (35 females,29 males;mean age,57 ± 11 years[range,29-79 years]) with primary severe superficial varicose veins of the lower extremity involving 64 legs were included between October 2015 and July 2019.The maximum diameter of the vein branches was ＞20 mm,which appeared to be cystic dilatation and forms large-scale in the crus or the thigh.All patients underwent high ligation and endovenous laser ablation or stripping of the trunk under general anesthesia.The surgical time,pain/phlebitis,number of incisions,amount of bleeding,recurrence of varicose vein,incidence of surgical site infections (SSIs),satisfaction score,and improvement in clinical symptoms were evaluated respectively with the patients in two groups: Group A,with patients who underwent treatment with the Trivex system,and Group B,patients who underwent treatment by point-form-stripping combined with FS.Results: All procedures were performed successfully.The average operative time in Group A was 56 ± 11 min,whereas that of Group B was 90 ± 33 min,which was a significant difference (p ＜ 0.05).Group A patients felt little pain after surgery,whereas in Group B the level of pain peaked on postoperative day 30,mostly due to thrombophlebitis after FS.There was no recurrence of varicose vein was observed in any patient,however,there were some residual effects in Group B,including the amount of bleeding volume,in-hospital stays,pain/phlebitis,and number of incisions (P ＜ 0.05).There were no significant differences with respect to SSIs,improvement in clinical symptoms,and satisfaction scores observed (p＞0.05).Conclusions: This study shows that patients benefited from both treatment options.However,primary severe superficial varicose veins of the lower extremity treated with the Trivex system suffered less pain with fewer incisions than severe branches treated with the point-form-stripping combined with foam sclerotherapy (FS).In summary,the Trivex system is a suitable treatment prior to point-form-stripping combined with foam sclerotherapy (FS) for those who demand a high level of appearance,and especially for young patients,the Trivex system is recommended.