Abstract: 【Abstract】〓Objective〓To investigate the elements of stone encrustation on double-J stent in patients underwent upper urinary tract surgery and the risk factors of stone formation postoperatively. Methods〓560 patient with double T stent were included in the study..The incidence of stone formation on double J tube shell in different indwelling time,.urine pH,.urine infection were investigated..The ingredient of urinary calculus was analyzed by infra-red sepectrometry. Results〓In 138 cases indwelling double J tube within one month, there were 14 cases with stone encrustation, accounting for 10.1%. In 258 cases indwelling double J tube for one month to three months, there were 31 cases with stone encrustation,.accounting for 12.0%..In 102 cases indwelling double J tube for three months to six months, there were 32 cases with stone encrustation, accounting for 31%. In 62 cases indwelling more than half a year, there were 26 cases with stone encrustation, accounting for 41.9%. Of 432 cases with calcium oxalate, 56 cases were found stone encrustation, accounted for 13%. Of 89 cases with uric acid component, 56 cases were found stone encrustation, accounted for 62.9%. Those cases with the urine PH less than 6.5, and with urine infection, had a higher incidence of stone encrustation on double J stent. Conclusion〓Longer residence time of double J tube, acidic environment, combined with urinary system infection are the risk factor for stone encrustation in patients underwent operation of upper urinary tract. Shortening the indwelling time, alkalizing the urine can prevent stone formation.

Key words: Double J stent, Stone encrustation, Urinary stone constituents, Indwelled time, Alkaline urine

摘要： 【摘要】 目的 观察比较不同条件下上尿路结石术后双J管后形成管壳结石的发生率,进一步了解双J管壳结石形成的危险因素,指导预防术后结石形成。方法〓分组统计不同留置时间、尿酸碱值、感染指标下双J管壳结石的发生率,利用红外光谱法对我院560例留置双J管的尿结石行结石成分分析,统计双J管壳形成结石的尿石成分比例。结果〓138例双J管留置1个月内,出现14例,占10.1%;258例留置1个月到3个月,出现31例,占12%;102例留置3个月到半年,出现32例,占31%;62例留置半年以上,出现26例,占41.9%。含草酸钙成分的有432例,发生管壳结石56例,占13.0%;含尿酸成分的有89例,发生管壳结石56例,占62.9%。PH<6.5、尿白细胞升高的双J管壳结石发生率高。结论〓双J管停留时间过长、酸性环境、合并泌尿系感染是双J管壳结石形成的危险因素,缩短留管时间、碱化尿液可能是预防双J管表面结石形成的一种有效的预防方法。

关键词: 双J管壳结石, 尿结石成分, 停留双J管时间, 碱化尿液