[Experiences with a modified nephrostomy instrument kit in ultrasound-guided kidney fistulization].

During a period of 24 months, ultrasound-guided percutaneous nephrostomies were performed in 51 patients in the Hospital at Köln-Merheim. The procedure was carried out with a modified nephrostomy instrument manufactured by Angiomed, Ettlingen, according to our own design. The procedure was successful in 49 patients. In one case it had to be abandoned because of lack of patient co-operation. In one patient a pyonephrosis was found and the patient was treated surgically.