[Doppler ultrasound study in patients with post-thrombotic syndrome: a screening method].

Doppler ultrasound has been a useful, noninvasive technique in the diagnosis of deep venous thrombosis. Until now, primary or secondary varicosities could only be clarified through phlebography or strain-gauge plethysmography. The aim of our study was to assess the flow time in 28 patients with primary varicose veins and postthrombotic syndrome using Doppler ultrasound. The Wilcoxon-Test was used for statistical reviewing in the second test, revealing a significant difference between both groups. The confidence intervals did not overlap.