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Preliminary 3D computational analysis of the relationship between aortic displacement force and direction of endograft movement  C. Alberto Figueroa,

Published byἙλένη Ταμτάκος Modified over 6 years ago

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Presentation on theme: "Preliminary 3D computational analysis of the relationship between aortic displacement force and direction of endograft movement  C. Alberto Figueroa,"— Presentation transcript:

1 Preliminary 3D computational analysis of the relationship between aortic displacement force and direction of endograft movement  C. Alberto Figueroa, PhD, Charles A. Taylor, PhD, Victoria Yeh, MSc, Allen J. Chiou, Madhu L. Gorrepati, MD, Christopher K. Zarins, MD  Journal of Vascular Surgery  Volume 51, Issue 6, Pages (June 2010) DOI: /j.jvs Copyright © 2010 Society for Vascular Surgery Terms and Conditions

2 Fig 1 Computer tomography data of five patients treated with AAA stent-grafts that experienced endograft movement. The figure shows data corresponding to the postoperative scan (baseline) and a follow-up scan usually taken just before a secondary procedure or re-intervention was performed. Journal of Vascular Surgery  , DOI: ( /j.jvs ) Copyright © 2010 Society for Vascular Surgery Terms and Conditions

3 Fig 2 Quantitative 3D analysis of the movement of the endograft centroid between a baseline postoperative state (top row), and a one-year follow-up state (middle row) for patient #2 of the study. The endograft centroid moves primarily in the antero-lateral direction (17.6 mm in the xy plane), and also in the axial direction (3 mm in z). Journal of Vascular Surgery  , DOI: ( /j.jvs ) Copyright © 2010 Society for Vascular Surgery Terms and Conditions

4 Fig 3 Computer methodology for displacement force calculation. Starting with the patient CT image data (A), 3D computer models of the endograft and the abdominal aorta are built (B). Then, CFD analyses calculating blood flow velocity and pressure in the computer model are performed (C). Lastly, the displacement force is computed using the results of the CFD analysis (D). Journal of Vascular Surgery  , DOI: ( /j.jvs ) Copyright © 2010 Society for Vascular Surgery Terms and Conditions

5 Fig 4 Comparison between the computed CFD pressure and the measured systolic and diastolic postoperative pressure values for each patient. The maximum relative error between the computed and measured data for the pressure pulse is less than 3% for all the patients. Journal of Vascular Surgery  , DOI: ( /j.jvs ) Copyright © 2010 Society for Vascular Surgery Terms and Conditions

6 Fig 5 Displacement force and endograft centroid movement vectors in the anterior and lateral views for the five patients considered in the study. Relative sizes of arrows reflect magnitude of the vectors. Journal of Vascular Surgery  , DOI: ( /j.jvs ) Copyright © 2010 Society for Vascular Surgery Terms and Conditions

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