[Long term renal function outcomes and predictive factors of chronic renal failure after living kidney donation]

Living donor kidney transplants give the best results in term of renal function and are the principal solutions for the transplant shortage. However, donors selection and kidney function evaluation after surgery are essential. The objective of this study was to evaluate the prevalence and to identify the predictive factors of chronic renal failure for the donor, after living donor nephrectomy.

It was a retrospective and monocentric study, including all the patients who underwent a living donor nephrectomy from 2007 to 2015 at the hospital of the Conception in Marseille. The primary study endpoint was renal function mesured by the glomerular filtration rate (GFR in mL/min) at 1 year and 5 years after surgery. The identification of moderate kidney failure predictive factors was achieved by an univariate and a multivariate analysis under Cox model.

Ninety-one patients were included. There was 40,7 % of men and media nage was 49 years (21; 70). Median pre-operative GFR was 94mL/min (67; 160). Median follow-up was 24 months (1; 120). Post operative GFR at 1 month, 1 year and 5 years was respectively 63mL/min (33; 90), 65mL/min (38; 107) and 67mL/min (56; 126) ans significantly lower than pre operative GFR (respectively P<0,001, P<0,001 et P=0,005). The prevalence of moderate kidney failure at 1 month, 1 year and 5 years was respectively 43,1 %, 33,3 % ans 25 %. In univariate and multivariate analysis, the only parametre significantly associated with a 1 year GFR>60mL/min wasp re operative GFR>90mL/min OR 3,61 IC95 % (1,27; 10,28) P=0,02.

Living donor nephrectomy leads to an important medium to long term loss of renal function. Donors with pre operative GFR<90mL/min should benefit from a rigorous supervision and nephrological care.

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