Finite Element Modeling of the Left Atrium to Facilitate the Design of an Endoscopic Atrial Retractor

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Title: Finite Element Modeling of the Left Atrium to Facilitate the Design of an Endoscopic Atrial Retractor
Author: Jernigan, Shaphan Rees
Advisors: Dr. Denis Cormier, Committee Member
Dr. Jeffrey Eischen, Committee Member
Dr. Gregory Buckner, Committee Chair
Abstract: With the worldwide prevalence of cardiovascular diseases (CVDs), much attention has been focused on simulating the characteristics of the human heart to better understand and treat cardiac disorders. The purpose of this study is to build a finite element model of the left atrium that incorporates detailed anatomical features and realistic material characteristics to investigate the interaction of heart tissue and surgical instruments. This model is used to facilitate the design of an endoscopically deployable atrial retractor for use in minimally invasive, robotically assisted (MIRA) mitral valve repair. The left atrial geometry is imported directly from MRI data of an explanted porcine heart, and material properties are derived from experimental testing of cardiac tissues. Model accuracy is verified by comparing simulated cardiac wall deflections to those measured by MRI. Finite element analysis is shown to be an effective tool for analyzing instrument/tissue interactions and for designing surgical instruments.
Date: 2006-04-17
Degree: MS
Discipline: Mechanical Engineering
URI: http://www.lib.ncsu.edu/resolver/1840.16/169


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