The Volume-Outcome Effect for Abdominal Aortic Surgery

Abstract
HOSPITALS THAT perform high volumes (HVHs) of complex vascular surgery have superior outcomes to those that perform low volumes (LVHs).1-6 Two recent population-based studies estimated that regionalization of high-risk surgery, including some complex vascular procedures, could potentially save thousands of lives each year in the United States.6,7 The relationship between hospital surgical volume and outcome is likely a complex interaction involving differences in preoperative patient selection, technological resources, surgeon and anesthesiologist experience, postoperative management, and other processes of care.8-10 By identifying the factors that explain the volume-outcome relationship, we can focus quality improvement efforts on these factors and reduce mortality at LVHs without disrupting access to care.