Abstract：Objective: To evaluate the efficacy and safety of robotic-assisted laparoscopic surgery in the treatment of primary obstructive megaureter. Methods: Four patients of symptomatic congenital megaureter underwent the robot-assisted laparoscopic surgery. In the operation, megaureter was exposed at the position around iliac blood vessel and filed with the latex band. Ureter was isolated to the bladder narrow area. Extreme ureter trim and submucosal tunnel encapsulation or papillary implantations anti reflux ureter bladder anastomosis were performed intro-peritoneal by robot-assisted laparoscopy. Clinical data of 4 patients after operation were retrospectively analyzed, including operation time, intraoperative complications, intraoperative bleeding volume, postoperative complications, postoperative hospitalization time and pathological results. Results: The operation was successfully performed in 4 patients. The mean operation time were (164.5±4.44) min, the mean operative blood loss were (18.75±4.79) ml. There were no intraoperative complications. The postoperative drainage time was 6d and the indwelling catheter time was 7 d for all the 4 patients. Postoperative hospitalization time was (7.0±0.82) d. There was no obvious pain, no secondary bleeding or urine leakage after operation. Postoperative pathology reports were urothelial mucosa chronic inflammation for all the 4 patients, who recovered well after surgery. Conclusions: Robot-assisted laparoscopy using different anti-reflux ureter bladder anastomosis is a safe and effective approach of minimally invasive treatment of congenital megaureter.
