BIFURCATED STENT GRAFT SYSTEM FOR THE TREATMENT OF THE ABDOMINAL AORTIC ANEURYSM AND A METHOD OF TREATMENT OF THE ABDOMINAL AORTIC ANEURYSM USING THE SYSTEM

摘要

Devices and associated methods are disclosed for improving the fixation of the stent graft to the wall of the abdominal aortic neck and to increase the tightness of the aneurysmal sac from the main lumen of the abdominal aorta. Particular embodiments are directed to a bifurcated stent graft system for the treatment of the abdominal aortic aneurysm, which includes an aortic bifurcation segment, two iliac segments and an additional inner segment. The aortic bifurcation segment contains a main tubular body with branched legs at the distal end made of biocompatible fabric material attached to and supported by stents. The proximal end of the aortic bifurcation segment is configured to engage with a part of the aorta, without aneurysmal dilatation, proximal to the renal arteries and contains only a metal expandable frame (for example, a stent), without fabric material, but with fixing pins for engagement with the aortic wall proximal to the renal arteries. The part of the aortic bifurcation segment placed in the proximal neck of the abdominal aortic aneurysm is made only of stent/stents, without biocompatible fabric material, but with fixing multidirectional (for example, caudally and cranially) pins on the outer surface for engagement with the aortic wall.