Use of coagulum for displaced ureteral calculi

At the time of distal ureterolithotomy the urologic surgeon is faced occasionally with the complication of a displaced ureteral calculus that has migrated proximally through a dilated ureter. We report such a case and offer an alternative method of injection and extraction of a cryoprecipitate coagulum through the ureterotomy. This technique may eliminate the need for an additional incision or a possible second operative procedure.