Aim — the objective of the present work was to study the influence of femoral venous reflux on the  severity of clinical manifestations of primary varicose veins in the lower extremities and to estimate the results of extravasal correction of the femoral vein valves with the use of a carcass spiral. Material and methods. The study included 133 patients presenting with primary varicosis. Group 1 was comprised of 64 patients with deep venous reflux who underwent the extravasal correction of the femoral vein valves (ECFVV) with the use of the Vedensky carcass spiral in combination with the intervention on the superficial veins. The control group (group 2) consisted of 69 patients without deep venous reflux who underwent phlebectomy. The patients of both groups exhibited subjective symptoms of the disease, such as pain, leg arching and heaviness, fatigue, etc.). Results. The two groups were matched in terms of age and sex, duration and clinical class of the disease. The mean VCSS scores in the patients of groups 1 and 2 were 1.83 and 1.45 (p=0.011) which can be accounted for by the greater severity of pain, swelling, varicous vein dilation, and trophic changes in group 1.  After the surgical treatment, the mean VCSS score in the patients of groups 1 decreased from 1.83 to 0.77 (p=0.005) due to the lowered intensity of pain, oedema, varicose vein syndrome, trophic disorders, and decreased requirements for the use of compression stockings. The long-lasting femoral venous reflux persisted in 25% of treated patients. This condition was completely eliminated in 65.6% of the patients. Conclusion. Deep venous reflux significantly aggravates the clinical course of primary varicosis. External valvuloplasty decreases the severity of clinical symptoms of varicose veins.