Adjustable automated biopsy device.

The authors describe a device for soft-tissue core biopsy with core length of 3-19 mm. Excellent results were obtained in combination with a new needle design in a series of 119 renal biopsies in pediatric and adolescent patients. With ultrasound guidance and adjustment of the core length in relation to kidney size, renal biopsy in pediatric patients can be safely performed with this device.