[Robotic partial nephrectomy: five years retrospective analysis at a single center]. / Néphrectomie partielle laparoscopique assistée par robot : analyse monocentrique et rétrospective sur cinq ans.

INTRODUCTION: The aim of this study is to assess perioperative outcomes in a large series of robotic partial nephrectomy. PATIENTS AND METHODS: We performed a retrospective analysis of 413 patients undergoing a robotic partial nephrectomy in a single center between June 2006 and December 2011. We analyzed demographic characteristics, operative and postoperative outcomes. RESULTS: Mean age was 58.6±11.9 years, body mass index was 30.5±7.1 kg/m2 and median ASA score 3. Mean tumor size was 3.2±1.66 cm and was divided in low, moderate and high RENAL nephrometry score respectively in 40%, 44% and 16%. Operative time and warm ischemia time were respectively 191 and 21min. Mean estimated blood loss was 200 mL and there were 4.3% major complications (Clavien-Dindo System). Mean length of stay was 3.6 days. The latest estimated glomerular filtration rate (eGFR) was 74.84 mL/min×1.73 m2 with a mean decrease of 8.6%. In multivariate analysis, Charlson comorbidity index (P=0.005), preoperative eGFR (P<0.001) and warm ischemia time (P=0.0025) were found to be independent predictors of latest postoperative renal function. CONCLUSION: Robotic partial nephrectomy is feasible and safe in experienced hands. In our study preoperative renal function, Charlson comorbidity index and warm ischemia time were independent predictors of latest eGFR.