Ask Dr. Z

50398 vs 50387? And why. Contrast material was then instilled through the bilateral nephroureteral tubes, and the images obtained show appropriate positioning and bilateral hydronephrosis/hydroureter. A Bentson wire was inserted through both of the existing 8 French nephrostomy tubes. While maintaining the guidewires in place, on each side the previously placed nephroureteral tubes were removed, and new nephroureteral tubes were advanced over the wire. New 8 French 26 cm tubes were introduced over the wire under fluoroscopic observation. The proximal loops were formed in the renal pelvis and the distal loops formed within the bladder. Contrast material instilled through these new tubes, and films obtained show adequate contrast opacification of the collecting systems. The nephroureteral tubes were then secured to the skin with revolution devices and sterile dressings were applied.