Computational simulations of MR elastography in idealised abdominal aortic aneurysms

Computational simulations of MR elastography in idealised abdominal aortic aneurysms

Introduction Patient specific modelling (PSM) of abdominal aortic aneurysm (AAA) aims to predict rupture risk by calculating the peak stress acting on the AAA wall using finite element analysis (FEA). It is hypothesised that magnetic resonance elastography (MRE), a non-invasive technique measuring material properties, can improve PSM by allowing integration of patient specific properties into t...

Computational Hemodynamics of Abdominal Aortic Aneurysms

An existing computational model is extended to simulate Newtonian and non-Newtonian blood flow in three dimensional idealized abdominal aortic aneurysm (AAA) geometries in order to calculate the wall shear stress (WSS) and wall shear stress gradient (WSSG) along the arterial wall and obtain the velocity profile. From these, the locations of high and low WSS and WSSG can be determined, as well a...

Large eddy simulations of blood dynamics in abdominal aortic aneurysms.

We study the effects of transition to turbulence in abdominal aortic aneurysms (AAA). The presence of transitional effects in such districts is related to the heart pulsatility and the sudden change of diameter of the vessels, and has been recorded by means of clinical measures as well as of computational studies. Here we propose, for the first time, the use of a large eddy simulation (LES) mod...

Preliminary Computational Hemodynamics Study of Double Aortic Aneurysms under Multistage Surgical Procedures: An Idealised Model Study

Double aortic aneurysm (DAA) falls under the category of multiple aortic aneurysms. Repair is generally done through staged surgery due to low invasiveness. In this approach, one aneurysm is cured per operation. Therefore, two operations are required for DAA. However, post-first-surgery rupture cases have been reported. Although the problems involved with managing staged surgery have been discu...

Commentary: Computational Biomechanics-Based Rupture Prediction of Abdominal Aortic Aneurysms.