[Ultrasound-guided percutaneous one-step nephrostomy]

The percutaneous nephrostomy-set described is a two-piece desposable set for temporary or permanent urine drainage. Under combined sonographic and radiologic control the thin but stabilised puncture needle, used alone, offers the advantage of permitting definitive establishment of the fistula in a fast and safe manner without changing of the guide instrument and without any troublesome bouginage.