Designing a Bayesian Model of the Plasma Clearance of Calcium Edetate de Sodium for the Calculation of GFR and Validity Compared to the Renal Clearance of Inulin

Inclusion Criteria: * Inclusion criteria for V1: * For transplanted patients : patients from 18 to 80 years, after estimation of their renal function by MDRDs formulas (MDRD = Modification of Diet in Renal Disease) , regardless their nephropathy, regardless the age of the transplantation, with a normal state body hydratation, with a social insurance and who have given their prior consent. * For other patients : patients from 18 to 80 years, after estimation of their renal function by MDRDs formulas, who need a reliable assess of their renal function, with a normal state body hydratation, with a social insurance and who have given their prior consent. * Inclusion criteria for V2: Transplanted patients who have participated to V1, with stable clinical conditions, with a stable GFR (less than 30% variation of creatinine clearance by MDRDs formulas) and who have given their prior consent. Exclusion Criteria: * Hypersensitivity to Calcium edetate de sodium * Inulin or excipients * Lead or other heavy metal intoxication * Volume expansion or dehydration * Acute renal disease * Bladder voiding affections * Coagulation disorders * Poor venous capital * People in guardianship * Patients already involved in an other research * Women in child bearing age without any method of contraception * Pregnant or lactating women.