Percutaneous antegrade balloon dilatation for the treatment of ureteral strictures after renal transplantation

Objective To evaluate the safety and efficacy of percutaneous balloon dilatation for the treatment of ureteral stricture after renal transplantation.Methods Data of 6 cases who received percutaneous antegrade balloon dilation when diagnosed as ureteral obstruction after renal transplantation during 2007 to 2011 in our hospital were retrospectively analyzed.All patients underwent percutaneous nephrostomy with B ultrasound guidance.The position of ureteral strictures was diagnosed with anterograde venography.Antegrade balloon dilation and double-J stent in ureter were performed subsequently.The cases changed to open surgery if the initial treatment failed.Results Two cases failed,the stricture length of 1 case was longer than 1cm,and the other case was complicated with urinary fistula and urinoma.The two patients changed to open surgery and were cured.Four patients were successfully treated with one dilatation,the transplant kidney function was stable and no ureteral obstruction was seen during 16-38 months of follow-up.Conclusion Antegrade balloon dilation is a safe,minimally invasive and useful method to treat ureteral strictures after renal transplantation.Open surgery is necessary for patients with dilation failure or other complications.