[The value of measuring reflux by color duplex in post-thrombotic syndrome].

Until now, the diagnosis of the postthrombotic syndrome is based upon venography. This study compares the diagnostic value of the CW-Doppler with the sonographic signs in the deep venous system observed in B-mode sonography and with the quantitative measurement of venous reflux by color Doppler sonography. 84 venous sections of 21 patients with phlebographically diagnosed PTS and substantial clinical signs were examined. CW- Doppler and B-mode sonography did not show significant differences compared to phlebographic findings. Color doppler sonography, however, showed signs which significantly went beyond those seen in venography.