The procedure of treating aortic aneurysms with stent-grafts is known as EVAR. This stands for EndoVascular Aneurysm Repair. I most commonly use EVAR to treat aneurysms of the abdominal aorta, thoracic aorta and popliteal artery. There are still a number of surgeons who perform open surgery for these conditions. In my opinion, open surgery should be reserved only for those patients in whom EVAR is technically not possible. In my practice, more than 90% of patients are suitable for EVAR. In the average UK hospital this figure is 40 to 60%.