OS1103 動脈瘤ラッピングとステントモデルの流体構造達成解析(生体の材料力学,OS-11 生体の材料力学)

抄録

Aortic aneurysm is a pathology that involves the enlargement of the aortic diameter and has risk factors including aortic dissection. Aneurysm wrapping and stent placement has been used in the treatment of aneurysms. This study aimed to investigate the biomechanical effects of wrapping and stenting on aneurysm. The three-layered aortic aneurysm were created and fluid structure interaction were simulated in wrapped model and stented model. The blood flow and wall mechanics were studied numerically in an axisymmetric model. We calculated Von Mises wall stress, streamlines and fluid pressure contours. The results provide quantitative predictions of flow patterns and wall mechanics as well as the effects of wrapping and stenting. This study shows that peak wall stress are highest in the media layer in the inflection position. Stent deployment reduced vortex inside the aneurysm and its impact on the aneurysm sac. The wrapped aortic wall showed reduced wall stress. The present simulation study indicated that wrapping and stent placement seem to offer a feasible technique in the effective treatment of aortic aneurysm.