[Thoracic stent graft sizing for endovascular repair in Stanford type B aortic dissection]

Endovascular treatment for Stanford type B aortic dissection uses thoracic aortic stent-graft system, which consists of covered stent and delivery system. The system is different in the configuration of the stent, the delivery system and the mode of release. The principle of endovascular treatment for Stanford type B aortic dissection is different from aortic aneurysm, so there are differences in stent selection. On the basis of preoperative assessment and measurement, it is suggested that the proximal diameter oversize of the stent is 0 to 5%, at 160 to 200 millimeters in length. The distal end of the stent should pass through the bend of the descending aorta to accommodate the descending aorta blood flow, and the oversize is 0. The postoperative complications and mortality including reverse dissection of proximal part and intima rupture of distal part induced by the stent will be effectively reduced with familiarity with the characteristics of stent-graft, understanding of the possible side effects of stent-graft, combining with the actual conditions and mastering the above principles.