Lang W, Günter E, Becker D, Sturm M, Heyder N, Schweiger H
Abteilung für Gefässchirurgie, Universität Erlangen-Nürnberg.
Ultraschall Med. 1994 Dec;15(6):312-6. doi: 10.1055/s-2007-1003971.
In 49 patients, colour-coded Duplex sonography was performed after implantation of a Greenfield caval filter. A plain film radiograph of the abdomen was taken additionally. The examination could be assessed free of artifacts in the longitudinal and transverse section in a total of 41 patients (84%). The procedure facilitates not only a diagnosis of thrombotic changes in the vena cava but can also display the topographical position of the filter and the venous flow. Caval thrombosis was verified in 5 patients. In 7 cases there was a decentral position of the filter apex with tilting. The penetration of filter struts through the vein wall eluded sonographic diagnosis as did morphological changes to the filter (e.g. filter fracture). In combination with the plain film radiograph, colour-coded Duplex sonography can replace cavography or computed tomography in the investigation of position and venous flow.
对49例患者在植入格林菲尔德下腔静脉滤器后进行了彩色编码双功超声检查。另外还拍摄了腹部平片。在总共41例患者（84%）中，检查在纵切面和横切面均未受伪像干扰，得以进行评估。该检查方法不仅有助于诊断下腔静脉内的血栓形成变化，还能显示滤器的位置及静脉血流情况。5例患者证实存在下腔静脉血栓形成。7例滤器顶端位置偏下且有倾斜。滤器支柱穿透静脉壁以及滤器形态学改变（如滤器断裂）均未能通过超声检查诊断出来。彩色编码双功超声检查结合腹部平片，在滤器位置及静脉血流情况的检查中可替代腔静脉造影或计算机断层扫描。
