Stricture recanalisation of the distal urether with various endoprothesis

Abstract

Introduction: Application of the metallic stents in the interventional uroradioligy is the result of continuous development of the new generation methods percutaneous nephrostomy (PCN), ballon catheter dilatation (BCD), methal and covered stent application. Application of metal stents in the renal canal system was attempted in order to eliminate BCD and PCN - related limitations as well as poor therapeutic results of these methods in a number of etiopathogenic groups of urinary stasis. Years - long application of interventional uroradiology methods, until the development of metallic stengts had shown the following therapeutics facts: PCN is incapable to resolve the cause of urinary obstruction. Permanent good therapeutic BCD results mostly depend on pathohistological aspect of the stricture, metallic stents are most frequently the last choice in therapeutics approch to urinary tract obstructions and their application is directly dependent on previous therapeutics results accomplished by PCN and BCD. In therapeutical sequences new generation of covered stents have important place as method of selection in patients of irreversible uroopstruction of distal ureter. Objective: The main goal of this study was to analyze therapeutics results, advanteges and shortages of insercion plastics and opened metallic endoprothesis, and to analyze results of covered methal applications on the contrary of using older interventional uroradiology methods. Method: Sixthytwo patients with distal urether strictures threated in the Deparment of interventional uroradiology Institute of Radiology Clinical centre of Serbia in Belgrade, participated in the study. Results were analyzed with Person's 2- test, Fisher test and Student T-test. Results: In our study we had highly significant differences in comparison with number of patients and type of stents during the time after recanalization was reached. Also it was highly significant differences according the type of used interventional uroradiology method that treated proliferation and the success of recanalization. Conclusion: Application of covered temporary uretheral stents have number advantages against using generation older permanent methal endoprothesis.