3 Clinical Trials for Various Conditions
Ureteroenteric anastomotic stricture is a well-known complication of urinary diversion which occurs in 4-25% of patients. Recent study has yielded that radiation is a significant risk factor for development of ureteroenteric stricture. The goal of this study is to determine whether intraoperative use of SPY fluorescent angiography during urinary diversion reduces rate of ureteroenteric stricture. This study will include 215 patients who have undergone urinary diversion over the past 5 years as historic controls and compare ureteroenteric stricture rates to a prospective cohort of patients in whom intraoperative SPY fluorescent angiography was used at the time of urinary diversion to assess the anastomotic perfusion. This will include injection of ICG intravenously as well as utilization of the SPY device to assess ureteral perfusion before and after ureteroenteric anastomosis. Based on power analysis, this study will require approximately 50 patients in our prospective group to detect a clinically significant difference of 5% between groups. Data analysis plan includes the use of chi square test for comparison of stricture rates between groups. Clinical outcomes will be followed prospectively, with no amendment to standard follow-up per physician.
Our objective is to assess the effect of duration of ureteral rest, defined as time from conversion of ureteral stent to percutaneous nephrostomy, on stricture length prior to ureteral reconstruction surgery.
The purpose of this study is to determine the rate of absorption of fluids (water or saline) during ureteroscopy and to assess the effects on electrolyte levels. The investigators also want to measure how much better the urologist can see the ureter based on the type of irrigation fluid that is used.