Intraoperative Damage Monitoring of Endoclamp Balloon Expansion Using Real-Time Finite Element Modeling

摘要: Endovascular clamping can be achieved by means of intraluminal occlusion with an Endoclamp balloon. Circumventing the need for opening thoracic cage provides significant benefits in terms reducing trauma patient. This procedure, however, induces risks damage to aortic lumen way over-expansion balloon, exposing tissue unsafe levels loading. Accurate estimates induced stress and consequent are required intraoperatively warn surgeon mitigate risk injury.This paper proposes a method intraoperative monitoring inflicted arterial tissue, finite element modeling. The Total Lagrangian Explicit Dynamic (TLED) (FE) formulation, capable handling geometric material nonlinearities, is used. A 2D plane strain formulation used additionally simplify speed up execution time number degrees freedom involved, meanwhile retaining sufficient accuracy proposed application. model incorporating as internal variable allowed tracking degree injury artery. large amount computation needed solve field relieved using dedicated massively parallel hardware. An Nvidia CUDA GPGPU (General Purpose Graphics Processing Unit) employed parallelize critical portions TLED algorithm. solution verified against industry-proven FE package Abaqus. Results show speed-ups compared Abaqus, thereby accuracy.