Evaluation the Ability of “STONE Nephrolithometry Score in Predicting Stone Clearance Rate and Complications Rate by Modified Clavien Classification”

Abstract

Original Research Article Background: Percutaneous nephrolithotomy (PCNL) is the minimally invasive treatment modality for complex kidney calculi and considered as the standard treatment for large and complex renal stones. With the marked increase in the incidence and prevalence of renal stones, the use of percutaneous nephrolithotomy (PCNL) is now considered as the standard treatment for large and complex renal stones. New predictive tools have recently emerged to systematically and quantitatively assess kidney stone complexity to predict outcomes following PCNL. Objective: To prospectively evaluate the ability of ̳stone nephrolithometry score in predicting stone clearance rate and complications rate by modified clavien classification (within 30 days of the procedure). Materials and Methods: A Prospective observational study done in the duration from Jun 2018 to July 2020. All patients having renal stone admitted for PCNL in Urology Department, National Institute of Kidney Diseases & Urology (NIKDU), Dhaka, Bangladesh. Results: A total 100 patients fulfilled the inclusion and exclusion criteria for undergoing the PCNL for this study. Ninety patients had total clearance. In complete clearance group average stone size is 810 mm 2 , Avg tract length was 87.61mm and average calyces involved was 1.1 with density of stone of 1024.9 HU. Conclusion: The STONE score is a simple and easy to apply system for predicting the complexity of the stone for PCNL, and stone clearance rate.