Effect Of Stent-Graft Active Fixation And Oversizing On Aortic Neck Dilation After Endovascular Aneurysm Exclusion For Infrarenal Aortic Aneurysm

Author(s):  
Lillian Malach ◽  
Nader Tehrani ◽  
Shilpa Kolachina ◽  
Karolina Krawczyk ◽  
Amy Wozniak ◽  
...  
2020 ◽  
Vol 72 (3) ◽  
pp. e296-e297
Author(s):  
Lillian Malach ◽  
Nader Tehrani ◽  
Shipla Kolachina ◽  
Karolina Krawczyk ◽  
Amy Wozniak ◽  
...  

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.


2016 ◽  
Vol 22 (5) ◽  
pp. 450-454 ◽  
Author(s):  
Felice Pecoraro ◽  
Giuseppe Corte ◽  
Ettore Dinoto ◽  
Giovanni Badalamenti ◽  
Salvatore Bruno ◽  
...  

VASA ◽  
1999 ◽  
Vol 28 (1) ◽  
pp. 30-33 ◽  
Author(s):  
Bürger ◽  
Meyer ◽  
Tautenhahn ◽  
Halloul

Background: Objective evaluation of the management of patients with ruptured infrarenal aortic aneurysm in emergency situations has been described rarely. Patients and methods: Fifty-two consecutive patients with ruptured infrarenal aortic aneurysm (mean age, 70.3 years; range, 56–89 years; SD 7.8) were admitted between January 1993 and March 1998. Emergency protocols, final reports, and follow-up data were analyzed retrospectively. APACHE II scores at admission and fifth postoperative day were assessed. Results: The time between the appearance of first symptoms and the referral of patients to the hospital was more than 5 hours in 37 patients (71%). Thirty-eight patients (71%) had signs of shock at time of admission. Ultrasound was performed in 81% of patients as the first diagnostic procedure. The most frequent site of aortic rupture was the left retroperitoneum (87%). Intraoperatively, acute left ventricular failure occurred in four patients, and cardiac arrest in two others. The postoperative course was complicated significantly in 34 patients. The overall mortality rate was 36.5% (n = 19). In 35 patients, APACHE II score was assessed, showing a probability of death of more than 40% in five patients and lower than 30% in 17 others. No patient showing probability of death of above 75% at the fifth postoperative day survived (n = 7). Conclusions: Ruptured aortic aneurysm demands surgical intervention. Clinical outcome is also influenced by preclinical and anesthetic management. The severity of disease as well as the patient’s prognosis can be approximated using APACHE II score. Treatment results of heterogenous patient groups can be compared.


2000 ◽  
Vol 7 (1) ◽  
pp. 47-67 ◽  
Author(s):  
Maxime Formichi ◽  
Yves Marois ◽  
Patrice Roby ◽  
Georgui Marinov ◽  
Patrick Stroman ◽  
...  

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