后尿道瓣是下尿路先天性阻塞的主要原因之一。由于解剖学方面的结构关系,尿道瓣可以有不同的方式来阻碍排尿,反过来它可以带来不同的症状,从微不足道的排尿障碍到严重的膀胱壁极度肥厚、巨输尿管、返流、肾积水和肾功衰竭等损害。临床上有两类先天性后尿道瓣:(1) 新生儿型,出现有如此严重的症状以致不能正常发育和严重的肾 Posterior urethral valve is one of the main causes of congenital obstruction of the lower urinary tract. Due to anatomical structural relationships, the urethral flap can have different ways to hinder urination, which can in turn cause different symptoms, from insignificant urination disorders to severe hypertrophy of the bladder wall, giant ureter, reflux, Water and kidney failure and other damage. Clinically, there are two types of congenital posterior urethral valve: (1) neonatal type, there are such serious symptoms that can not be normal development and severe kidney