[Complication of ureterorenoscopy].

We describe failures and complications of ureterorenoscopy based on our own experience and the literature. There is usually no consequence when perforating the ureter--which happens in 10 per cent of the cases--if a splint or a percutaneous nephrostomy is applied. Ureteral rupture makes an open intervention necessary, but happens rarely. Since complications of ureterorenoscopy are rare and the rate of success very high, open operations on the ureter should become less frequent.