Günther vena caval filter: results of long-term follow-up.

A Günther vena caval filter was implanted in the inferior vena cava in 59 patients to prevent pulmonary embolism. This newly available device, which can be inserted percutaneously via a 10-French introduction system, has three filtering planes. No complications occurred at the puncture site. Follow-up included clinical examinations (54 patients), plain radiographs (50 patients), and CT scans (41 patients); these examinations were performed up to 21 months after implantation. Caudal migration of the filter occurred in 35 (70%) of the 50 patients who had radiographs, but no cranial or oblique movement occurred. Occlusion of the filter was noted in three (7%) of 41 patients who had CT examinations. Thromboemboli were seen inside the filter in 16 (39%) of the 41 patients who had CT scans. Recurrent pulmonary embolism was not observed after filter implantation. The Günther vena caval filter seems to be a satisfactory device for preventing pulmonary embolism.