Effects on Aortoiliac Fluid Dynamics After Endovascular Sealing of Abdominal Aneurysms

CASCIARO, MARIANO E.; DOTTORI, JAVIER; EL-BATTI, SALMA; ALSAC, JEAN-MARC; MOUSSEAUX, ELIE; LARRABIDE, IGNACIO; CRAIEM, DAMIAN

VASCULAR AND ENDOVASCULAR SURGERY

SAGE PUBLICATIONS INC

Año: 2018 vol. - p. 1 - 1

1538-5744

Objectives: To evaluate the effects on aortoiliac fluid dynamics after the implantation of an endograft based on endovascular aneurysm sealing (EVAS) versus endovascular aneurysm repair (EVAR) strategy. Methods: An adaptive geometrical deformable model was used for aortic lumen segmentation in 8 patients before and after the surgery. Abdominal aneurysms were treated with an endograft based on the EVAS system (Nellix, n = 4) and with a device based on an anatomical fixation technology (n = 4). Pressure, blood velocity, and wall shear stress (WSS) were estimated at different aortic regions using computational fluid dynamics methods. Physiologic inlet/outlet flow values at the abdominal aorta, the celiac trunk, and the mesenteric and the renal arteries were set. Pressure references were set at iliac arteries outlet. Results: Maximum aneurysm sizes were similar for both groups in the preoperative scans. The lumen area was lower after EVAR (P