The Dual Lumen Ureteral Catheter is a bifurcated catheter with one lumen used for the passage of a guidewire and the other lumen used to inject or drain fluids. The catheter is a 10 Fr. dual lumen polyurethane ureteral catheter with a 50cm working length, compatible with a 0.038" guidewire. It is intended to facilitate drainage and retrograde pyelogram of the upper urinary tract. This catheter will allow access to and navigation of a torturous ureter using standard endoscopic techniques. The ureteral catheter should be inserted into the ureter using standard endourologic technique, under direct, fluoroscopic or radiographic visualization.