Korean J Urol.  1999 Oct;40(10):1257-1260.

Lower Caliceal Stone Clearance after Shock Wave Lithotripsy: Impact of Lower Pole Radiographic Anatomy

• Yoon JS
• Park CH
• Kim CI

Abstract

PURPOSE: We analyzed our experience to determine the influence of infundibulo-pelvoureteral angle, lower calyceal width and length in predicting the clearance of fragments after extracorporal shock wave lithotripsy(ESWL) for lower calyceal stone.
MATERIALS AND METHODS
From October 1995 to April 1998, a retrospective analysis of 51 patients with a solitary radiopaque lower pole calyceal stone who underwent excretory urography(IVP) preoperatively were treated ESWL with a Storz Modulith SLX third generation.
RESULTS
The overall stone-free rate was 54.9%. Stone-free status after ESWL was significantly related to each anatomical measurement. Of the stone-free and not stone-free groups, with the infundibulo-pelvoureteral angle 40 degree or greater 21 patients were found in stone-free groups(75%) and 5 patients in not stone-free groups(21.7%), with the infundibular width >5mm 22 patients were found in stone-free groups(78.6%) and 11 patients in not stone-free groups(47.8%) and with the infundibular length < or =30mm 16 patients were found in stone-free groups(57.1%) and 5 patients in not stone-free groups(21.7%), respectively.
CONCLUSIONS
We recommend that the 3 major radiographic features of the lower pole calix should be assessed during intravenous urography to facilitate the planning of treatment for lower calyceal stones.

Keyword

SWL; Lower pole anatomy; Ston free-rate

MeSH Terms

Humans
Lithotripsy*
Retrospective Studies
Shock*
Urography