uret[医] 氮氧甲基ure抱朴说uremic gingivitis尿毒症性龈炎ureterosigmostomy输尿管乙状结肠吻合术Ureteropyeloseopy输尿管肾镜urethro-meatomy尿道外口切开术Ureteral injuries输尿管损伤ureteral agenesis输尿管缺如Ureteric calculus输尿管结石Ureteric stenosis输尿管狭窄ureosmotic animal尿素渗透性动物urethrovesicopexy尿道膀胱悬吊术