scholarly journals Thrombotic Occlusion of Stent Graft Limbs due to Severe Angulation of Aortic Neck in Endovascular Repair of Abdominal Aortic Aneurysm

2016 ◽  
Vol 46 (5) ◽  
pp. 727 ◽  
Author(s):  
Minsu Kim ◽  
Myeong Gun Kim ◽  
Woong Chol Kang ◽  
Pyung Chun Oh ◽  
Ji Yeon Lee ◽  
...  
2007 ◽  
Vol 36 (4) ◽  
pp. 198-201
Author(s):  
Keiji Ataka ◽  
Masahiro Sakata ◽  
Takashi Munezane ◽  
Kazuhiko Iwahashi

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Siang Lin Yeow ◽  
Hwa Liang Leo

This study investigates the effect of a novel flow remodeling stent graft (FRSG) on the hemodynamic characteristics in highly angulated abdominal aortic aneurysm based on computational fluid dynamics (CFD) approach. An idealized aortic aneurysm with varying aortic neck angulations was constructed and CFD simulations were performed on nonstented models and stented models with FRSG. The influence of FRSG intervention on the hemodynamic performance is analyzed and compared in terms of flow patterns, wall shear stress (WSS), and pressure distribution in the aneurysm. The findings showed that aortic neck angulations significantly influence the velocity flow field in nonstented models, with larger angulations shifting the mainstream blood flow towards the center of the aorta. By introducing FRSG treatment into the aneurysm, erratic flow recirculation pattern in the aneurysm sac diminishes while the average velocity magnitude in the aneurysm sac was reduced in the range of 39% to 53%. FRSG intervention protects the aneurysm against the impacts of high velocity concentrated flow and decreases wall shear stress by more than 50%. The simulation results highlighted that FRSG may effectively treat aneurysm with high aortic neck angulations via the mechanism of promoting thrombus formation and subsequently led to the resorption of the aneurysm.


1999 ◽  
Vol 6 (4) ◽  
pp. 354-358 ◽  
Author(s):  
Rishad M. Faruqi ◽  
Timothy A. M. Chuter ◽  
Linda M. Reilly ◽  
Rajiv Sawhney ◽  
Susan Wall ◽  
...  

2012 ◽  
Vol 65 (5-6) ◽  
pp. 255-258
Author(s):  
Momir Sarac ◽  
Ivan Marjanovic ◽  
Uros Zoranovic ◽  
Miodrag Jevtic ◽  
Sidor Misovic ◽  
...  

Introduction. One of the most common complications of endovascular repair of abdominal aortic aneurysm is type II endoleak - retrograde branch flow. Case report. A 76-year-old man with abdominal aortic aneurysm, 7. 1cm in diameter and aneurysm of the right common iliac artery, 3. 2cm in diameter was admitted to our Department with abdominal pain. The patient had no chance of having open repair of abdominal aortic aneurysm because of high perioperative risk (cardiac ejection fraction of 23%, chronic pulmonary obstructive disease). Multislice computed angiography also revealed a large inferior mesenteric artery, 6mm in diameter with the origin in thrombus of aneurysm. We decided to repair abdominal aortic aneurysm with GORE? EXCLUDER ? stent-graft with crossed right hypogastric, but first we decided to embolize the inferior mesenteric artery. Angiography was performed through the right femoral approach and the good Riolan arcade was found. After that the inferior mesenteric artery was embolized with two coils, 5 mm in diameter, at the origin of artery in aneurysm thrombus. At the end of procedure, abdominal aortic aneurysm was repaired with GORE? stent-graft, and the control angiography was performed. There was no endoleak, and the Riolan arcade was very good. The patient was discharged after 5 days. There were no signs of ischemia of the left colon, and peristaltic was excellent. Control multislice computed angiography was done after 1 and 3 months. There were no signs of endoleak. On the control colonoscopy there were no signs of ischemia of the colon. Conclusion. Endovascular repair of symptomatic abdominal aortic aneurysm in high risk patients with preoperative embolization of large branch is the best choice to prevent rupture of abdominal aortic aneurysm and to prevent type II endoleak.


1999 ◽  
Vol 6 (4) ◽  
pp. 354-358 ◽  
Author(s):  
Rishad M. Faruqi ◽  
Timothy A. M. Chuter ◽  
Linda M. Reilly ◽  
Rajiv Sawhney ◽  
Susan Wall ◽  
...  

2012 ◽  
Vol 55 (4) ◽  
pp. 929-934 ◽  
Author(s):  
Alexander Oberhuber ◽  
Marcella Buecken ◽  
Martin Hoffmann ◽  
Karl-Heinz Orend ◽  
Bernd Manfred Mühling

1999 ◽  
Vol 86 (5) ◽  
pp. 697-697
Author(s):  
S. R. Walker ◽  
J. Macierewicz ◽  
S. C. Whitaker ◽  
R. H. S. Gregson ◽  
B. R. Hopkinson

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