Lower pole ratio: a new and accurate predictor of lower pole stone clearance after shockwave lithotripsy?

International Journal of Urology : Official Journal of the Japanese Urological Association
Yan Kit FongKok Kit Ng

Abstract

Lower pole spatial anatomy is an important determinant of success after extracorporeal shockwave lithotripsy. In the present study, we determine whether there is a significant relationship between lower pole ratio (infundibular length : infundibular width) on preoperative intravenous urograms and stone fragment clearances after shockwave lithotripsy. A total of 42 patients with isolated lower pole stones were retrospectively reviewed. Anatomical factors, such as infundibular length, width and infundibulopelvic angle were measured and the lower pole ratio was calculated on pretreatment intravenous urogram. Stone fragment clearance was assessed at three months with a plain abdominal X-ray. The overall three-month stone-free rate was 62%. Mean stone size +/- SD was 10 +/- 4.8 mm, mean infundibular length was 21.7 +/- 6.9 mm, mean infundibular width was 6.1 +/- 2.3 mm, mean infundibulopelvic angle was 62.1 +/- 30.1 degrees and mean lower pole ratio was 4.3 +/- 2.8. Stone-free status after shockwave lithotripsy was significantly related to infundibular length and width as well as to lower pole ratio, but not to infundibulo-pelvic angle. Infundibular length less than 30 mm, width greater than 5 mm and lower pole ratio less than 3.5 w...Continue Reading

Citations

Jul 10, 2007·International Urology and Nephrology·Serhat GurocakIbrahim Bozkirli
Mar 31, 2005·Journal of Endourology
Oct 22, 2008·Journal of Endourology·Geert G TaillyThomas O Tailly
Jul 11, 2014·International Braz J Urol : Official Journal of the Brazilian Society of Urology·Emre ArpaliSemih Yasar Sargin
Jul 4, 2006·International Braz J Urol : Official Journal of the Brazilian Society of Urology·Bora KupeliIbrahim Bozkirli
Oct 29, 2008·Journal of the Chinese Medical Association : JCMA·Chih-Chieh LinKuang-Kuo Chen
Sep 26, 2007·Urologia Internationalis·M VellaG Caramia
Feb 28, 2008·Current Opinion in Urology·Jay D Raman, Margaret S Pearle

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