Rapid balloon dilatation of the nephrostomy track for nephrostolithotomy.

Abstract
The Olbert balloon catheter can be used to dilate a nephrostomy track from 9 to 30 F [French] (3-10 mm) in a single step. Percutaneous nephrostomy, track dilatation and percutaneous stone extraction can be performed within 40-90 min. This catheter was used successfully in 10 patients without encountering complications.