Aim: To evaluate the effectiveness of mechano-chemical obliteration in the treatment of varicose enlargement of the great saphenous vein.Material and Methods: The results of mechano-chemical obliteration of 57 patients (49 (85.9%) women, 8 (14.1%) men; average age 27.2±4.1 years) with varicose disease were analyzed. In 39 patients (36 women and 3 men), the second, and in 18 (13 women and 5 men) – the third class of varicose transformation of subcutaneous veins was observed. The average body mass index of patients was 28.2±2.4 kg/m2, and the average duration of varicose disease was 7.6±1.8 years.Results and Discussion: The average diameter of the great saphenous vein was 10.4±2.1 mm. Insufficiency of perforating veins with an average diameter of 3.2±0.8 mm was detected in 31 (54.4%) cases. The technical success of the procedure was 100%. No intraoperative complications occurred in any patient. The average duration of mechanochemical obliteration was 24.2±4.8 minutes, and the entire operation – crossectomy, mechano-chemical obliteration, and excision of dilated tributary veins – lasted 98.5±25.5 minutes. The average length of the great saphenous vein subjected to mechano-chemical obliteration was 94.2±6.1 cm. The level of pain on the first day after surgery was 3.8±0.6 points, decreasing to 0.9±0.1 points before discharge. Only on the day after the intervention, patients required narcotic analgesics (average volume of used anesthetics – 1.5±0.5 ml); on other days, patients received non-steroidal anti-inflammatory drugs (average duration 3.5±0.5 days, volume – 10.5±1.5 ml).Conclusion: Mechano-chemical scleroobliteration is one of the effective methods for eliminating pathological vertical reflux, with its effectiveness observed in the vast majority of patients in the long term.Moreover, due to its minimal invasiveness and capability for repeated application, it can be recommended for widespread clinical use. To improve the results of mechano-chemical obliteration and reduce the frequency of recanalization of the great saphenous vein, it is necessary to supplement the procedure with crossectomy and miniphlebectomy.