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Renal lithiasis, can we predict the need for retreatment in retrograde intrarenal surgery (RIRS)?

[Renal lithiasis, can we predict the need for retreatment in retrograde intrarenal surgery (RIRS)?] Arch Esp Urol. 2017 Jun;70(5):534-541 Authors: Palmero-Martí JL, Panach-Navarrete J, Valls-González L, Ganau-Ituren A, Pastor-Lence JC, Benedicto-Redón A Abstract OBJECTIVES: To analyze the predictive factors for retreatment in RIRS to achieve complete lithiasis resolution. METHODS: Retrospective comparative study analyzing 298 cases of RIRS performed in our center over a 3 year period. The cohort was divided in two groups: Resolution in one operation or more than one, evaluating homogeneicity for age and gender. We compared the folowing variables: Hounsfield units, body mass index (BMI), number of stones, size, (on the case of multiple stones, larger stone size), side, location in the kidney and stone biochemistry. Bivariant statistical analysis by Student's t and Chi square tests, and multivariate analysis by binary logistic regression. ROC curves were made to set cutting points for relationship between quantitative variables. RESULTS: The groups were homogeneous for both age and gender (p>0.05). 260 (87.25%) patients required one treatment only and 38 (12.75%) more than one. Among the study variables, the only one that showed differences between the groups wa stone size, being the mean size 18 mm in the single treatment group and 26 mm in the more than one treatment group (Difference between mean values -8.27, 95%CI: -5,91...
Source: Archivos Espanoles de Urologia - Category: Urology & Nephrology Tags: Arch Esp Urol Source Type: research

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