Stent length in the treatment of aneurysm determined by accommodation and variation of aortic diameter: Case Study

Abstract

In recent years, patients with thoracic and abdominal aortic aneurysms have relied on the clinical alternative of treatment with endovascular stents to obtain relief since SLE stents support the weak area of the aorta.

This type of treatment of abdominal aortic aneurysm with stents is the most applied alternative as treatment today. The aim of this study is to determine the length of the stent in the treatment of aneurysm determined by the accommodation and variation of the diameter of the aorta. , by means of a mathematical algorithm that allows the definition of an equation to predetermine the final length after being released from the stent catheter in the implantation of a stent or three stents (triple stent) and the treatment of the tomography images. To establish the mathematical equation, a nitinol Lumini® stent, manufactured by the company Braile® Biomédica (Brazil), of the self-expanding type inserted in a tube of known diameter was used. To obtain the equation, measurements of the dimensional variation of the cells were made, from the insertion diameter to the free expansion zone of the stent, where the cells would be in their geometric form of retrieval by the memory of the material, and where there is no more dimensional variation and with the processing of the results, a mathematical model was obtained that allows to predetermine the change of extension for each stent applied in the treatment,  depending on the diameter in which it will be inserted.

DOI:https://doi.org/10.56238/sevenIIImulti2023-234