Abstract: This paper investigated the correlation between color Doppler ultrasonography-based deep venous reflux index (RI) and venous clinical severity score (VCSS) in patients with great saphenous varicose veins complicated with deep femoral popliteal venous reflux. 150 patients with great saphenous varicose veins combined with deep femoral popliteal venous reflux were selected as the research group, and 60 patients with great saphenous varices without deep femoral popliteal venous reflux during the same period were selected as the study group. All patients underwent color Doppler ultrasonography. The results showed that the reflux time, reflux speed and RI in the study group were higher than those in the control group (P<0.05). The AUC of the reflux time, reflux speed and RI in the diagnosis of deep femoral popliteal venous reflux in patients with saphenous varices were 0.820, 0.749, 0.832, respectively. The AUC of combined diagnosis was 0.875. The reflux time, reflux velocity and RI were still significantly correlated with saphenous varices combined with deep femoral popliteal regurgitation (P<0.05). The RI and VCSS scores of patients with venous reflux were positively correlated with the degree of venous reflux (r=0.912, 0.806, P<0.05). The RI were positively correlated with VCSS scores of patients with great saphenous varices combined with deep femoral popliteal venous reflux (r=0.738, P<0.05). Deep vein RI based on color Doppler ultrasonography is positively correlated with VCSS score in patients with great saphenous varicose veins complicated with deep femoral popliteal venous reflux, which can assist clinical assessment of patients' condition, and the reflux time, reflux velocity and RI has a certain value helpful in the diagnosis of great saphenous varices combined with deep femoral popliteal venous reflux.

Key words: great saphenous varicose veins, deep femoral popliteal venous reflux, ultrasonography, venous clinical severity score, diagnosis