LONG-TERM OUTCOME FOLLOWING VENA-CAVA FIL TER IMPLANTATION

In order to help clarify the long-term results of filter implantation and how best to manage the post-operative care, 92 patients with impla nted filters were observed for up to 6 years. The follow-up examinatio ns included detailed interrogation, a clinical investigation, plain ab dominal radiography in two planes, contrast-enhanced computed tomograp hy of the vena cava and colour-coded duplex sonography of the vena cav a and The veins of the pelvic and legs. In the early phase of the stud y, two patients who received Gunther filters in 1988 experienced dislo cation of the filter after 3 months. In the later phase, 85% of those treated with oral anti-coagulants and compression showed patent pelvic veins in areas where, at the time of filter implantation, there had b een thrombi with the potential to cause embolism. In 72 cases, the inf erior v.cava proved to be parent in the area of the filter.