[Duplex ultrasound of post-thrombotic syndrome--quantification of venous flow parameters].

In the last years Duplex-Sonography established itself in the diagnosis of venous diseases. This noninvasive method combines Doppler-ultrasound and real-time sonography. In this way an exact quantitative interpretation of the Dopplersounds in relation to the examined blood vessel is possible. Especially the venous bloodflow of postthrombotic veins will be explored. It will be discussed whether the data measured by Duplex-sonography allow a staging of venous diseases.