MP06-12 PRE-OPERATIVE STONE VOLUME MEASUREMENT PROGRAM (QSAS) IS BEST PREDICTOR OF PERCUTANEOUS NEPHROLITHOTOMY (PCNL) OPERATIVE TIME AND STONE FREE RATE

You have accessJournal of UrologyStone Disease: Surgical Therapy I (MP06)1 Sep 2021MP06-12 PRE-OPERATIVE STONE VOLUME MEASUREMENT PROGRAM (QSAS) IS BEST PREDICTOR OF PERCUTANEOUS NEPHROLITHOTOMY (PCNL) OPERATIVE TIME AND FREE RATE Margaret Meagher, Tommy Chiou, Andrea Ferrero, Roger Sur, and Seth Bechis MeagherMargaret Meagher More articles by this author , ChiouTommy Chiou FerreroAndrea Ferrero SurRoger Sur BechisSeth View All Author Informationhttps://doi.org/10.1097/JU.0000000000001973.12AboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookLinked InTwitterEmail Abstract INTRODUCTION OBJECTIVE: Linear dimensions historically been used measure stone burden. However, emerging data suggests that volume may offer advantages in predicting outcomes. We hypothesize for larger stones with more complex anatomical shapes, is accurate than linear dimension PCNL METHODS: Single institution retrospective analysis patients treated via standard from 7/2017-1/2020 was performed. Pre-operative CT scan images were analyzed manually calculate diameter using the quantitative Stone Analysis Software (qSAS) total (SV) maximum (MD). Primary outcome post-operative stone-free rate (SFR) (logistic ordinal regression). Secondary operative time (linear Potential variables associated outcomes interest (univariate regression) compared OR or R-values, p<0.1 eligible inclusion multivariate analysis. RESULTS: 324 analyzed. Average age 59 years average BMI 28.7 kg/m2. 23.1% 11.7% had complete partial staghorn morphology, respectively, a mean pre-operative SV 1,568mm3 MD 2.3cm. Logistic regression revealed morphology (OR=3.98, p=0.031), increasing (OR=1.11, p=0.007), higher GUYS score (OR=1.68, p=0.031) be independently lower likelihood clinical free status (Table 1A). Ordinal found (pseudo- R2=0.791, p<0.001) better predicted SFR when urologist (pseudo-R2=0.644, software (pseudo-R2=0.68, measured MD. Higher Hounsfield Units (B=0.03, p=0.047), (B=0.17, p=0.006), (B=23.05, longer operating 1B). CONCLUSIONS: Software-calculated accurately predicts post-PCNL dimension. also aids times add value presurgical planning. Calculation addition should considered precisely counsel efficacy PCNL. Source Funding: None © 2021 American Urological Association Education Research, Inc.FiguresReferencesRelatedDetails Volume 206Issue Supplement 3September 2021Page: e94-e94 Advertisement Copyright & Permissions© Inc.MetricsAuthor Information Expand Loading ...