URETEROSCOPY - CURRENT PRACTICE AND LONG-TERM COMPLICATIONS

Purpose: We compared a current cohort of patients who underwent ureter oscopy to a cohort from the early 1980s to determine changes in succes s, indications and long-term complications of the procedure. Materials and Methods: A chart review was performed of 194 patients who underwe nt 209 ureteroscopic procedures at our institution during 1992. This g roup was then statistically compared to 317 patients who underwent 346 ureteroscopies between 1982 and 1985. Results: The current indication s for ureteroscopy were calculus extraction (67% of the cases), diagno sis (28%) and stent manipulation (5%). These indications differed from those of the early series, in which 84% of all ureteroscopies were pe rformed for calculus extraction and 16% for diagnosis. Overall uretero scopic success rate increased from 86 to 96% (p < 0.001). Success of s tone extraction improved from 89 to 95% (p = 0.08, distal success rate 95 to 97% and proximal success rate 72 to 77%). Success of diagnostic inspections increased from 73 to 98% (p < 0.001). In the early series failure was usually due to inability to traverse the ureter (54% of t he cases), while currently failure is due almost exclusively to impass able ureteral strictures (63%). The overall complication rate decrease d from 20 to 12% (p = 0.01) and the rate of significant complications decreased from 6.6 to 1.5% (p < 0.05). Clinical followup (mean 36 mont hs) for all patients and radiological followup (mean 9.8 months) for 6 7% of eligible patients detected only 1 ureteral stricture. The remain ing patients were asymptomatic after the ureteroscopic procedure. Conc lusions: Improvements in ureteroscope design, accessories and techniqu e have led to a significant increase in the success of diagnostic and therapeutic ureteroscopy while decreasing morbidity. Outpatient ureter oscopic stone extraction, particularly for distal ureteral calculi, is almost uniformly successful with low morbidity. The long-term complic ation rate of ureteroscopy is 0.5%.