Endovascular vs. Surgical AV Fistulas (IMAGE) Dowling & Dennis PR Caption A comparison of the two-year cumulative patency between the Ellipsys endovascular created fistulas and surgically created fistulas. Credit Dowling & Dennis PR Usage Restrictions none License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.