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.

• 结果输尿管中下段结石以第四狭窄(输尿管进入膀胱壁外缘)及第五狭窄(膀胱壁内段)多见。