number of vascular centers has decreased over the years, and the proportion of endovascular procedures has increased, although to a variable degree throughout the country, and to a lesser degree than in many other European countries.They tell a story of challenges that are not distinct for Norway, including: the conflict of need for sufficient volume of a procedure to ensure quality, versus the need for health services close to where patients live; the introduction of a new technique requiring collaboration of highly skilled experts from several specialties and the political demand for equitable health care; and the third aspect, can we rely on the data from our clinical databases and administrative registries? Regarding the political goal of equitable health care,Norway has a challenging geography. Only 5 million people live in the country, of whom about 50% live in the area of the SouthEastern Regional Health Authority. In some regions, travel distances to even a small hospital are several hours.Vascular surgery has been a subspecialty of general surgery since 1986, and endovascular proceduresareperformedincollaborationwithinterventionalradiologists. Since the first report from the Norwegian association for vascular surgery in 2001 regarding the structure of vascular surgical healthcare services, there has been an ongoing debate about where vascular surgery should be performed. 2 Should all hospitals perform vascular surgery? Should there be one regional center where, for instance, endovascular aortic repairs should be performed, while peripheral vascular surgery could be performed more widely? How many procedures need to be performed to ensure quality for the patients and quality in the training of vascular surgeons? There was an understanding that vascular centers ought to serve a large enough population to acquire excellence in both open and endovascular repair of aortic aneurysms. Publications regarding feasibility of endovascular repair of acute aneurysms, with lower mortality, and the emerging practice of this in the larger centers, also influenced the discussion. This led to processes and heated discussions in all health regions. The importance and interdependence of vascular surgery with trauma care and other acute surgical care were issues e if vascular surgery was not offered, could the hospital still be an acute service surgical hospital? What about travelling times in acute cases? The threats to the hospitals’ future existence were obvious. This involved discussion far beyond the vascular surgical community. To guide the policy debates, the knowledge base for the relationship between volume and quality was at the same time sought through a systematic review of the literature. 3 Although there was fairly strong evidence regarding a positive correlation between