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Ultrasound duplex angioscanning (USAS) is designed to detect, among other things, venous reflux, its source and extent. Up to now, there have been no reliable tests making it possible to unambiguously detect the valvular incompetence of the superficial veins. Hence, the necessity of developing methods for the solution of tis problem. We proposed the method for the detection of superficial venous reflux with the use of ultrasound duplex angioscanning that allows to generate the retrograde blood flow in the subcutaneous veins by means of manual compression, i.e. sliding movements of the hand along the incompetent venous trunk, to enhance the effectiveness of this 7 procedure.