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近20年来，临床数据证实胸主动脉腔内修复术是治疗急性Stanford B型主动脉夹层的最佳治疗方法。学者们一直在不断寻找Stanford B型急性主动脉夹层预后不良的危险因素。假腔部分血栓化使得主动脉直径增加，主动脉破裂风险增加。假腔部分血栓化的Stanford B型主动脉夹层患者病死率高，是患者院外死亡的独立预测因子。假腔部分血栓化的患者应被定义为复杂性Stanford B型主动脉夹层，需要严格随访，早期干预。“,”Rapidly accumulating data over the past 20 years have confirmed that thoracic endovascular aortic repair is the optimal therapy for the treatment of acute Stanford type B aortic dissection. Experts have been looking for risk factors for poor prognosis of Stanford type B acute aortic dissection. Partial false lumen thrombosis have also been suggested to be associated with an increased rate of aortic growth and risk of aortic rupture. Mortality is high from the hospital among patients with partial thrombosis of the false lumen in Stanford type B acute aortic dissection. Partial thrombosis of the false lumen is a significant independent predictor of post discharge mortality in these patients. Patients with false lumen partial thrombosis should be defined as a complicated Stanford type B aortic dissection and require more intensive follow-up and early intervention.