The Role of Passive Ureteral Dilation by Stent in Ureteroscopy

Objective To summarise the experience on passive ureteral dilation by stent in ureteroscopy. Methods Twleve patients were admitted for ureteral stone,nine of which were in lower-middle ureter,three in upper ureter.There were three patients whose age were from one to three years,five patients whose age from four to twelve years,four patients whose age from twenty-one to fouty-five years in the group.Eight of them were male,four female.The ureteroscopies were performed on all patients and found difficult for edema and stenosis in ureter or small lumens.The double J was placed in ureter for one to four weeks before the ureteroscopy were performed again.Results It was found that the ureters presented relaxation and dilation after the stents were detained.All patients were succeeded in the second ureteroscopy.All ureter stones were finished and no complications occurred.Conclusion The passive ureteral dilation by stent can increase achievement ratio and decrease risk for ureteroscopy and is very useful for pediatric ureteral stone.