Riccardo Bertolo1, Giuseppe Simone2, Juan Garisto1, Georges Nakhoul3, Sherif Armanyous3, Jose Agudelo1, Manuela Costantini2, Gabriele Tuderti2, Michele Gallucci2, Jihad Kaouk4. 1. Glickman Urological and Kidney Institute, Department of Urology, Cleveland Clinic, Cleveland, OH, USA. 2. Department of Urology, "Regina Elena" National Cancer Institute, Rome, Italy. 3. Glickman Urological and Kidney Institute, Department of Nephrology, Cleveland Clinic, Cleveland, OH, USA. 4. Glickman Urological and Kidney Institute, Department of Urology, Cleveland Clinic, Cleveland, OH, USA. Electronic address: kaoukj@ccf.org.
Abstract
INTRODUCTION: Aim of the study was to compare perioperative, functional and oncological outcomes after off-clamp vs on-clamp robotic partial nephrectomy (RPN). MATERIALS AND METHODS: Patients who underwent off-clamp or on-clamp (warm ischemia) RPN were extracted from 2 institutional prospectively-maintained databases. 123 patients who underwent off-clamp RPN at one institution were excluded, so that each institution contributed with unselected patients (institution 1:on-clamp RPN vs institution 2:off-clamp). 2:1 propensity-score matching (age, sex, smoking, diabetes, hypertension, ASA score, solitary kidney, preoperative eGFR, tumor size and R.E.N.A.L.score). Perioperative outcomes were compared. A linear mixed model was fitted to eGFR as the outcome regressed on fixed effects for 1) management of clamping (on-clamp/off-clamp), 2) time (at baseline, at discharge, at 12 and 24 months postoperatively), and 3) clamp/time interaction. Survival events were compared between groups. RESULTS: 1983 patients were pooled. After matching, 400 on-clamp vs 200 off-clamp patients were analyzed. No significant differences were found in key perioperative outcomes. The effect of on-clamp on eGFR changed over time. At discharge, groups had similar drop in eGFR. The difference between groups was greatest at 12-months postoperatively, with on-clamp patients showing a deficit of 5 ml/min. At 24-months follow-up, this gap shrunk to 2 ml/min. There were no significant differences in overall survival (p = 0.1), recurrence (χ2 = 0.008, p = 0.9), or metastasis free survival (χ2 = 0.962 p = 0.3). Only one cancer-specific death occurred in off-clamp group. CONCLUSION: We confirm no significant differences in the perioperative and oncological outcomes between off-clamp and on-clamp RPN. Avoided ischemia benefits renal function within 1-year follow-up after surgery. At longer follow-up, difference with on-clamp is softened.
INTRODUCTION: Aim of the study was to compare perioperative, functional and oncological outcomes after off-clamp vs on-clamp robotic partial nephrectomy (RPN). MATERIALS AND METHODS:Patients who underwent off-clamp or on-clamp (warm ischemia) RPN were extracted from 2 institutional prospectively-maintained databases. 123 patients who underwent off-clamp RPN at one institution were excluded, so that each institution contributed with unselected patients (institution 1:on-clamp RPN vs institution 2:off-clamp). 2:1 propensity-score matching (age, sex, smoking, diabetes, hypertension, ASA score, solitary kidney, preoperative eGFR, tumor size and R.E.N.A.L.score). Perioperative outcomes were compared. A linear mixed model was fitted to eGFR as the outcome regressed on fixed effects for 1) management of clamping (on-clamp/off-clamp), 2) time (at baseline, at discharge, at 12 and 24 months postoperatively), and 3) clamp/time interaction. Survival events were compared between groups. RESULTS: 1983 patients were pooled. After matching, 400 on-clamp vs 200 off-clamp patients were analyzed. No significant differences were found in key perioperative outcomes. The effect of on-clamp on eGFR changed over time. At discharge, groups had similar drop in eGFR. The difference between groups was greatest at 12-months postoperatively, with on-clamp patients showing a deficit of 5 ml/min. At 24-months follow-up, this gap shrunk to 2 ml/min. There were no significant differences in overall survival (p = 0.1), recurrence (χ2 = 0.008, p = 0.9), or metastasis free survival (χ2 = 0.962 p = 0.3). Only one cancer-specific death occurred in off-clamp group. CONCLUSION: We confirm no significant differences in the perioperative and oncological outcomes between off-clamp and on-clamp RPN. Avoided ischemia benefits renal function within 1-year follow-up after surgery. At longer follow-up, difference with on-clamp is softened.
Authors: Fabrizio Di Maida; Riccardo Campi; Brian R Lane; Ottavio De Cobelli; Francesco Sanguedolce; Georgios Hatzichristodoulou; Alessandro Antonelli; Antonio Andrea Grosso; Sabrina Noyes; Oscar Rodriguez-Faba; Frank X Keeley; Johan Langenhuijsen; Gennaro Musi; Tobias Klatte; Marco Roscigno; Bulent Akdogan; Maria Furlan; Claudio Simeone; Nihat Karakoyunlu; Martin Marszalek; Umberto Capitanio; Alessandro Volpe; Sabine Brookman-May; Jürgen E Gschwend; Marc C Smaldone; Robert G Uzzo; Alexander Kutikov; Andrea Minervini Journal: J Clin Med Date: 2022-03-23 Impact factor: 4.241