Methods To lay stress on scanning the each stenostomia points and first scanning the neighbouring anatomical marks.

方法管中下段各狭窄部位进行重点扫查,并利用与管毗邻的解剖标志帮助定位。

Results Most of the calculus could be found in the 4 (muscular layer of vesical) ,and 5th (in the outlet of ureter) stenostomia region of ureter.

果管中下段第四狭窄(管进入膀胱壁外缘)及第五狭窄(膀胱壁内段)多见。