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目的：了解先天性尿道下裂行各种尿道成形术失败后，利用膀胱粘膜行尿道成形术的疗效。方法：将严重狭窄和（或）无法修补的尿瘘瘢痕组织彻底切除，取膀胱粘膜片形成尿道，正位开口于龟头，新尿道内置多孔硅胶支架管作引流。结果：２８例中，２３例治愈，３例有小尿瘘需作尿瘘修补，２例完全失败，再次作粘膜尿道成形术治愈。结论：各种类型先天性尿道下裂尿道成形失败后，可用膀胱粘膜移植尿道成形，效果良好
Objective: To investigate the curative effect of urethroplasty using bladder mucosa after failure of various urethroplasty in congenital hypospadias. Methods: The severely stenosed and / or irreparable fistula tissue of the fistula was completely excised. The bladder mucosa was taken as the urethra. The anterior opening was opened in the glans penis. The new urethra was filled with porous silica stent for drainage. Results: In 28 cases, 23 cases were cured, 3 cases had small urinary fistula need to repair urinary fistula, 2 cases failed completely, again cured by mucosal urethroplasty. Conclusion: All kinds of congenital hypospadia urethroplasty failed, available bladder mucosa transplanting urethra, the effect is good