Development of a Decision-making Aid for Referring Severe Kidney Injury Patients for Nephrology Consultations

Inclusion Criteria: * Age \>18 years * Suffering from acute kidney injury treated with dialysis * hospitalized in a university center from August 2016 to December 2017 with severe AKI defined according to 2 of the 3 criterion definitions of KDIGO stage AKI: an increase in SCr above 354 μmol/Lor renal replacement therapy (RRT) indication, but not the 3-fold increase in SCr increase within 7 days with SCr below 354 μmol/L. * The patient has been informed and does not oppose the study * The patient is insured or the beneficiary of a health insurance policy Exclusion Criteria: * The patients is under judicial protection or state guardianship * Patient has chronic kidney disease(CKD) KDIGO stage 5 * It proves impossible to give the patient clear information * patients living with kidney transplant * plan dialysis for bilateral surgery nephrectomy * patient refuse to participate and patients with no health insurance