A-245 Pre-therapeutic radiological evaluation
J. Raupach, O. Renc, P. Hoffmann, J. Zizka; | Saturday, March 9, 08:30 – 10:00 / Room N/O
Endovascular abdominal aortic aneurysm repair (EVAR) was introduced over 20 years ago to primarily treat old and sick patients. Due to technical improvements and satisfactory clinical results of this technology, the number of patients treated with stent-grafts is steadily increasing. There is also tendency to use this therapy for ruptured abdominal aortic aneurysms. Pre-operative assessment of aortic morphology regarding suitability for stent-graft implantation is, therefore, an important challenge for every radiologist now. Main limitation of EVAR is unfavourable anatomy of landing zones and access vessels. Gold standard for EVAR planning is contrast-enhanced CTA. Alternative modality for patients with contraindications for CT, such as renal impairment, is unenhanced MR with steady-state free precession sequence. A number of 2D or 3D reconstructions are generated to provide information about the aneurysm morphology. Dedicated vessel analysis and planning software can be applied. Usually, axial images and thin MPR reconstructions are sufficient in emergent cases. Proper stent selection is a domain of operator and is still matter of his/her experience. The planning procedure can be subdivided into 4 different sections: infrarenal neck, aneurysmal sac, aortic bifurcation and access vessels. There are several critical and rules which must be obeyed during the evaluation process and general radiologists should be aware of. The presentation will review main inclusion and exclusion criteria for EVAR.