Living-donor kidney transplantation: comparison of sequential and simultaneous surgical organizations.

The objective of this study was to compare living-donor kidney transplantation (LDKT) performed either sequentially, in one operating room, leading to extended cold ischemia time (CIT) or simultaneously, in two different operating room, with shorter CIT. We retrospectively included all living-donor nephrectomies and kidney transplantations, performed from March 2010 to March 2014, in three French university centers. In the first one (C1), LDKTs were performed in sequential manner (Sequential group) and in C2 and C3, LDKTs were performed in simultaneous manner (Simultaneous group). A total of 324 LDKT were performed: 176 LDKT in Sequential group and 148 LDKT in Simultaneous group. Patients characteristics were equivalent between groups, except nephrectomy side, ABO mismatch rate and previous kidney transplantation rate. CIT, rewarming time, transfusion and delayed graft function (DGF) were significantly higher in Sequential group. Overall survival and graft survival of kidney transplant recipients were similar in the Sequential and Simultaneous groups. 5-year eGFR was similar between groups. In univariate analysis, number of graft arteries, recipient BMI, previous kidney transplantation status and CIT were significant predictors of DGF. Only previous kidney transplantation status was an independent predictive factor of DGF in the multivariate analysis. Sequential surgical organization results in the same functional results as simultaneous surgical organization. DGF was higher for LDKT performed sequentially but at 5-year overall survival, graft survival and eGFR were similar between these two types of transplant organizations.