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[The use of color duplex scanning in the diagnosis of pathology of the venous system of the lower extremities].

During 1993-1996 period of time 175 patients with the lower extremities varication and post-thrombophlebitis syndrome (PTHPHS) were investigated using colour duplex scanning. Definite changes in the veins structure and spectral characteristics of blood flow in them corresponded to every PTHPHS stage. In an acute stage the lumen of the vessel is full of friable thrombotic masses, the blood from is absent. In 2-3 weeks the first recanalization signs appears showing the thrombus consolidation and residual blood flow. The recanalization process completes with the deep veins cusps destruction and retrograde blood escape occurrence, as a rule. The diagnosis criteria of each stage, the permissible limits of venous reflux, the hemodynamics peculiarities in combined affection of the deep veins various segments are substantiated.