[Surgical therapy of post-thrombotic conditions (author's transl)].

The author begins with a brief discussion of the terminology of phlebitis and then elucidated the significance of the deep veins and of the secondary varices in connection with the post-thrombotic syndroms. He explains why it is not possible to take therapeutic measures direct at the blocked vein section and goes into bypass operations in the case of isolated pelvic vein and formal vein blockade as a possible method of treatment. He stresses the importance of early treatment.