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

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