Improved assessment and treatment of abdominal aortic aneurysms: the use of 3D reconstructions as a surgical guidance tool in endovascular repair
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Endovascular repair is fast becoming the treatment of choice for abdominal aortic aneurysms in anatomically suitable patients. 3D reconstructions not only aid conventional 2D measurements but also allow further analyses of the vessel anatomy.
Computed tomography scan data for four male patients awaiting endovascular repair were obtained. 3D reconstructions were performed to determine measurements. Wall stress was determined on one particular case using finite element analysis.
3D reconstruction allows measurements to be obtained that can be difficult to determine using 2D images. This method complements traditional 2D approaches. Reconstructions also provided imaging of potential anatomical problems. Wall stress results showed key regions that may be possible rupture sites.
3D reconstructions greatly aid surgical planning. As stent-graft devices evolve, anatomical difficulties previously considered contraindications to endovascular repair can now be overcome with careful planning. 3D reconstruction is a useful adjunct to assessment and planning of endovascular repair.
KeywordsAbdominal aortic aneurysm 3D reconstruction Endovascular repair Surgical planning
The authors would like to thank (1) the Irish Research Council for Science, Engineering and Technology (IRCSET) Grant RS/2005/340 (2) Grant #R01-HL-060670 from the US National Heart Lung and Blood Institute (3) the Department of Vascular Surgery in the HSE Midwestern Regional Hospital, Ireland (4) the Department of Radiology in the HSE Midwestern Regional Hospital, Ireland (5) Prof. David A. Vorp from the Departments of Surgery and Bioengineering, Centre for Vascular Remodelling and Regeneration, McGowan Institute of Regenerative Medicine, University of Pittsburgh, USA and (6) Mr. Prakash Madhavan, Consultant Vascular Surgeon, St. James Hospital, Dublin, Ireland.
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