多年来各教科书都描写输尿管有三个自然狭窄段;肾盂与输尿管交界处、输尿管与膀胱交界处、输尿管中点(即跨过髂总动脉分叉处,位于骨盆上缘)。但临床上骨盆上缘并非输尿管结石常见之停留部位,静脉尿路造影也未显示输尿管中点附近有狭窄段。作者为此检查了14具死后48小时以内的新鲜尸体,年 Over the years all textbooks describe the ureter has three natural narrow segments; renal pelvis and ureter junction, ureter and bladder junction, ureter midpoint (ie, across the common iliac artery bifurcation, located in the upper edge of the pelvis). However, the clinical upper pelvis is not the common site of ureteral stones, intravenous urography did not show the ureter midpoint near the stenosis. The authors examined 14 fresh cadavers within 48 hours after their death, year