Therapy of extrinsic ureteral obstruction with 2 parallel ureteral Double-J stents

We present our experiences with the approach of placing 2 parallel ureteral Double-J stents simultaneously in extrinsically obstructed ureters. In all 5 reported patients therapy with single ureteral stents had failed despite correct stent position. With the increased stiffness of 2 parallel uretera l silicon 7F Double-J stents ureteral kinking and luminal compression could be reduced leading to sufficient reduction of hydronephrosis. This approac h with potential space between the stents preserves urinary flow th rough a s well as around the stents which is considered to be the most important me chanism in stented ureters. In cases of extrinsic ureteral obstruction with failure of a single stent t he simultaneous use of 2 parallel Double-J ureteral stents should be taken into account as a technically easy therapeutic option. It may obviate percu taneous nephrostomy tube placement or more invasive therapy.