Metal Stents in Malignant Obstruction of Caval Veins

摘要: Stenosis or occlusion of the caval veins is not a rare event in cancer patients: it can be responsible dramatic symptoms and when acute, occasionally even lethal. Percutaneous transluminal angioplasty (PTA), while successfully applied treatment arterial stenoses, only successful due to persistent perivascular compression by tumor, postradiation transmural compressing fibrosis. Transmural endoluminal tumor growth may also occur, but rare. Repeated dilatations with high-pressure balloons, laser-assisted PTA, simultaneous inflation several balloons placed side have been applied, successful, high restenosis rate was observed, particularly benign conditions, where radiologists are more reluctant place stents than patients (Zeitler 1978; Glanz et al. 1980; Jeans 1983; Yamada Uflaker 1984; Sherry 1986; Saced 1987; Copek Cope 1989; Martin 1990). Poor flow, such as limb paralysis, injury venous endothelium balloon-dilatation lead rapid rethrombosis absence stent placement. For these reasons, placement metal has rapidly evolved choice large vein obstruction non-surgical patients, allowing for immediate permanent achievement symptom relief patency (Bernstein 1994; Nicholson 1997; Yim 2000; Wudel Nesbitt 2001).