Open AccessExternal validation of Resorlu-Unsal stone score in predicting outcomes after retrograde intrarenal surgery. Experience from a single institution
Author(s) -
Antonio Tufano,
Marco Frisenda,
Antônio Rossi,
Pietro Viscuso,
Guglielmo Mantica,
Pierluigi Bove,
Rosario Leonardi,
Alessandro Calarco
Publication year - 2022
Publication title -
archivio italiano di urologia andrologia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.429
H-Index - 23
eISSN - 2282-4197
pISSN - 1124-3562
DOI - 10.4081/aiua.2022.3.311
Subject(s) - medicine , nomogram , hydronephrosis , surgery , logistic regression , retrospective cohort study , kidney stones , urinary system
Pre-operative assessment of renal stones is essential in selecting treatment options and achieving high success rates for retrograde intrarenal surgery (RIRS). Several nephrolithometric scoring systems have been developed using pre-operative clinical data and stone characteristics. Resorlu-Unsal stone score (RUSS) is composed of four different parameters, and each of them adds 1 point to the nal score. One point is added in patients with stone size > 20 mm, lower calyceal stones and infundibulo-pelvic angle < 45°, stone number > 1, and abnormal anatomy, respec-tively. RUSS categorizes patients into four distinct groups and aims to predict stone-free rates (SFR) after RIRS. We externally validated RUSS and evaluated its predictive accuracy.