Aim: Duplex-sonography is a suitable method to evaluate the hemodynamic situation in venous disorders. The aim of the study was to examine whether the volume flow data measured in the common femoral vein are corresponding to the grade of the venous disease. Method: In 77 healthy persons (limbs), 82 patients (limbs) with a complete form of varicosis of the long saphenous vein and 30 patients (limbs) with an incomplete form of this varicose type the venous volume flow (SV) in the common femoral vein was measured by duplex- sonography. The evaluation of SV was done by integration of the blood flow velocity in relation to the diameter (SV-D) and the circumference (SV-U) of the vessel. The location of the measurement was the common femoral vein just distal the junction with the long saphene vein. The examination was performed in horizontal position with elevated upper part of the body (45°). Result: We found significant differences of the means between the collectives (p <0,005). In complete varicosis mSV-D was 0,34 l/min and mSV-U was 0,37 l/min. In incomplete form of varicosis the values were significant lower (mSV-D = 0,27 l/min, mSV-U = 0,30 l/min). In healthy limbs mSV-D and mSV-U were 0,15 l/min. The results demonstrate a correlation between the measured flow volume in the common femoral vein an the grade of the venous reflux disease.