Fenestrated endovascular aneurysm repair (FEVAR) is a minimally invasive method of abdominal aortic aneurysm (AAA) repair utilized in patients with complex vessel anatomies. Stent grafts (SG) used in this process contain fenestrations within the device that need to be aligned with the visceral arteries upon successful SG deployment. Proper alignment is crucial to maintain blood flow to these arteries and avoid surgical complications. During fenestrated SG deployment, rotation of the SG can occur during the unsheathing process. This leads to misalignment of the vessels, and the fenestrations and is associated with poor clinical outcomes. The aim of this study was to develop a computational model of the FEVAR process to predict SG rotation. Six patient-specific cases are presented and compared with surgical case data. Realistic material properties, frictional effects, deployment methods, and boundary conditions are included in the model. A mean simulation error of 2 deg (range 1–4 deg) was observed. This model was then used to conduct a parameter study of frictional properties to see if rotation could be minimized. This study showed that increasing or decreasing the coefficients of friction (COF) between the sheath and the vessel walls would decrease the amount of rotation observed. Our model accurately predicts the amount of SG rotation observed during FEVAR and can be used as a preoperative planning tool within the surgical workflow.
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September 2018
Research-Article
Predicting Rotation in Fenestrated Endovascular Aneurysm Repair Using Finite Element Analysis
Ryan M. Sanford,
Ryan M. Sanford
Department of Mechanical and
Industrial Engineering,
University of Toronto,
Toronto, ON M5S 3G8, Canada
Industrial Engineering,
University of Toronto,
Toronto, ON M5S 3G8, Canada
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Sean A. Crawford,
Sean A. Crawford
Division of Vascular Surgery,
Peter Munk Cardiac Centre,
University Health Network and
University of Toronto,
Toronto, ON M5G 2C4, Canada;
Peter Munk Cardiac Centre,
University Health Network and
University of Toronto,
Toronto, ON M5G 2C4, Canada;
Institute of Biomaterials and
Biomedical Engineering,
University of Toronto,
Toronto, ON M5S 3G9, Canada
Biomedical Engineering,
University of Toronto,
Toronto, ON M5S 3G9, Canada
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Helen Genis,
Helen Genis
Division of Vascular Surgery,
Peter Munk Cardiac Centre,
University Health Network and
University of Toronto,
Toronto, ON M5G 2C4, Canada
Peter Munk Cardiac Centre,
University Health Network and
University of Toronto,
Toronto, ON M5G 2C4, Canada
Search for other works by this author on:
Matthew G. Doyle,
Matthew G. Doyle
Department of Mechanical and
Industrial Engineering,
University of Toronto,
Toronto, ON M5S 3G8, Canada;
Industrial Engineering,
University of Toronto,
Toronto, ON M5S 3G8, Canada;
Division of Vascular Surgery,
Peter Munk Cardiac Centre,
University Health Network and
University of Toronto,
Toronto, ON M5G 2C4, Canada
e-mail: mg.doyle@utoronto.ca
Peter Munk Cardiac Centre,
University Health Network and
University of Toronto,
Toronto, ON M5G 2C4, Canada
e-mail: mg.doyle@utoronto.ca
Search for other works by this author on:
Thomas L. Forbes,
Thomas L. Forbes
Division of Vascular Surgery,
Peter Munk Cardiac Centre,
University Health Network and
University of Toronto,
Toronto, ON M5G 2C4, Canada
Peter Munk Cardiac Centre,
University Health Network and
University of Toronto,
Toronto, ON M5G 2C4, Canada
Search for other works by this author on:
Cristina H. Amon
Cristina H. Amon
Department of Mechanical and
Industrial Engineering,
University of Toronto,
Toronto, ON M5S 3G8, Canada;
Industrial Engineering,
University of Toronto,
Toronto, ON M5S 3G8, Canada;
Institute of Biomaterials and
Biomedical Engineering,
University of Toronto,
Toronto, ON M5S 3G9, Canada
Biomedical Engineering,
University of Toronto,
Toronto, ON M5S 3G9, Canada
Search for other works by this author on:
Ryan M. Sanford
Department of Mechanical and
Industrial Engineering,
University of Toronto,
Toronto, ON M5S 3G8, Canada
Industrial Engineering,
University of Toronto,
Toronto, ON M5S 3G8, Canada
Sean A. Crawford
Division of Vascular Surgery,
Peter Munk Cardiac Centre,
University Health Network and
University of Toronto,
Toronto, ON M5G 2C4, Canada;
Peter Munk Cardiac Centre,
University Health Network and
University of Toronto,
Toronto, ON M5G 2C4, Canada;
Institute of Biomaterials and
Biomedical Engineering,
University of Toronto,
Toronto, ON M5S 3G9, Canada
Biomedical Engineering,
University of Toronto,
Toronto, ON M5S 3G9, Canada
Helen Genis
Division of Vascular Surgery,
Peter Munk Cardiac Centre,
University Health Network and
University of Toronto,
Toronto, ON M5G 2C4, Canada
Peter Munk Cardiac Centre,
University Health Network and
University of Toronto,
Toronto, ON M5G 2C4, Canada
Matthew G. Doyle
Department of Mechanical and
Industrial Engineering,
University of Toronto,
Toronto, ON M5S 3G8, Canada;
Industrial Engineering,
University of Toronto,
Toronto, ON M5S 3G8, Canada;
Division of Vascular Surgery,
Peter Munk Cardiac Centre,
University Health Network and
University of Toronto,
Toronto, ON M5G 2C4, Canada
e-mail: mg.doyle@utoronto.ca
Peter Munk Cardiac Centre,
University Health Network and
University of Toronto,
Toronto, ON M5G 2C4, Canada
e-mail: mg.doyle@utoronto.ca
Thomas L. Forbes
Division of Vascular Surgery,
Peter Munk Cardiac Centre,
University Health Network and
University of Toronto,
Toronto, ON M5G 2C4, Canada
Peter Munk Cardiac Centre,
University Health Network and
University of Toronto,
Toronto, ON M5G 2C4, Canada
Cristina H. Amon
Department of Mechanical and
Industrial Engineering,
University of Toronto,
Toronto, ON M5S 3G8, Canada;
Industrial Engineering,
University of Toronto,
Toronto, ON M5S 3G8, Canada;
Institute of Biomaterials and
Biomedical Engineering,
University of Toronto,
Toronto, ON M5S 3G9, Canada
Biomedical Engineering,
University of Toronto,
Toronto, ON M5S 3G9, Canada
1Corresponding author.
Manuscript received August 8, 2017; final manuscript received April 26, 2018; published online May 24, 2018. Assoc. Editor: Keefe B. Manning.
J Biomech Eng. Sep 2018, 140(9): 091004 (8 pages)
Published Online: May 24, 2018
Article history
Received:
August 8, 2017
Revised:
April 26, 2018
Citation
Sanford, R. M., Crawford, S. A., Genis, H., Doyle, M. G., Forbes, T. L., and Amon, C. H. (May 24, 2018). "Predicting Rotation in Fenestrated Endovascular Aneurysm Repair Using Finite Element Analysis." ASME. J Biomech Eng. September 2018; 140(9): 091004. https://doi.org/10.1115/1.4040124
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