A new operative fiberpyeloscope.

We describe a flexible fiberpyeloscope with which it is possible to extract renal pelvic and caliceal stones easily. The tip of the fiberpyeloscope can be deflected 90 degrees up or down from the basic position with a hand-manipulated angle deflector know on the fiberpyeloscope grip. This flexibility allows the inside of the renal pelvis to be observed clearly from every direction. Specially designed stone forceps can be inserted through the channel of the fiberpyeloscope into the renal pelvis to grasp pelvic stones under direct visual observation. The fiberpyeloscope has been used in 4 cases of renal pelvic stones in which the pelvis was exposed by a subcostal flank incision. The stones were extracted successfully with the fiberpyeloscope, which was introduced through a small incision on the pelvis.