整个泌尿系是一个管道系统,管腔通畅是保证其功能正常的基本条件。肾盂积水通常由梗阻所致,引起梗阻的病因很多,有先天性因素如输尿管狭窄,环状肌层缺乏,开口异位和输尿管肾盂连接处瓣膜样皱摺或连接位置较高等;后天性因素常见有结石、外 The entire urinary system is a pipe system, lumen patency is to ensure the normal functioning of the basic conditions. Hydronephrosis is usually caused by obstruction, caused by many causes of obstruction, there are congenital factors such as ureteral stricture, lack of annular myometrium, open ectopic and ureteric renal pelvis junction valve-like fold or connection position higher; acquired factors Common stones, outside