Results Ureteral perforation occurred in 12 cases (2%), and urethral submucosa pseudocanal in 8 cases (1.3%). 1 case (0.17%) underwent nephrectomy because of ureteral stricture.

• 输尿管口撕裂假道形成8例(1.；3%25)；术后输尿管狭窄行肾切除1例(0