Prediction of Surgical Outcome as Regards Stone Free Rate and Complications after Percutaneous Nephrolithotomy Using S. T. O. N. E. versus sResc Scoring Systems
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- Category: Vol. 89, June 2021
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Prediction of Surgical Outcome as Regards Stone Free Rate and Complications after Percutaneous Nephrolithotomy Using S. T. O. N. E. versus sResc Scoring Systems, AHMED S. HEGAZY, MOHAMMED I. SHABAYEKA and ABDELRAHIM G.A. ELSHERBINY
Abstract
Background: Nephrolithiasis is a major worldwide source of morbidity, constituting a common urological disease affect-ing 10-15% of the world population. Aim of Study: To compare the S.T.O.N.E versus sResc scoring system in prediction of the surgical outcome as regards stone free rate and complication after PCNL. Patients and Methods: A prospective randomized clinical study conducted in Department of Urology, Faculty of Med-icine, Ain Shams University Hospitals. Study period was 6 months from 3-2020 till 9-2020. Results: STONE total score involved size, tract length, degree of obstruction, number of involved calyces and stone density. STONE score was 6.8±1.7. S-ReSC total score was 3.1±1.6. A significant statistical association between both scores was found (c2: 119.681, p<0.001). Mean STONE score was 6.19±1.20 compared to 7.92±1.89 in free and residual group of patients respectively (t: 4997; p<0.0001). Mean S-ReSC score was 2.14±0.88 compared to 4.76±1.30 in free and residual group of patients respectively (t: 4997; p<0.0001). Both scores were higher significantly in patients with residual stones. The ROC curve shows that the best cut off point for S-ReSC score to detect residual free rate was found >2 with sensitivity 100%, specificity 76.19% and Area Under Curve (AUC) 95% while the best cut off point for STONE score to detect residual free rate was found >6 with sensitivity 70.3%, specificity 68.3% and Area Under Curve (AUC) 76.4%. Conclusion: Both S-ReSC and S.T.O.N.E Nephrolithom-etry Scores can be used to stratify the complexity of renal stone before PCNL to predict the stone clearance and compli-cation.