Experimental Analysis of Endovascular Treatment of AAA and Predictors of Long Term Outcomes

摘要: This chapter describes experimental investigations of parameters which are likely to reduce the ability an implanted stent-graft for treatment Abdominal Aortic Aneurysm (AAA) resist migration. Idealised AAA analogues were manufactured with realistic wall properties. Both proximal stents and complete devices deployed inside these models force required cause migration during physiological flow was investigated. The effect morphology on columnar rigidity generated by a transmitted end device also Lower compliance pulsatile motions due seen fixation stent from 8.4 ± 0.32 3.7 0.06 N. results show that high systolic pressure or low length migrate graft 4.62 0.25 2.57 0.11 N in flexible little longitudinal rigidity. In fully stented correlations less clear complex compressive behaviour increase iliac when reduced. Longitudinal measured terms amount 5 mm compression found provide up 11.53 resistance is greater than afforded passive alone. Even shown require 5.88 internal assisting holding its shape. Increasing bifurcation angle placing tortuous configuration both devices. showed drag acting may be somewhat attenuated forces set non rigid model. tortuosity 2.56 4.92 Tortuosity higher leg have double disadvantage increasing decreasing rigidity, while crucial success passively fixated stent-grafts. test methods described this could useful future preclinical evaluation stent-grafts design phase next generation EVAR