Inclusion Criteria:  Older than 18 y Admitted in the ICU for a post operative care after liver transplant  Exclusion Criteria:  Consent refusal Liver transplant due to acute liver failure Renal transplant ( Previous or concomitant) Refusal from the healthcare provider responsible for the patient Renal substitution therapy in the prior 15 days Pregnancy Re-Transplant (Liver transplant in the previous 6 month) Hepatorenal syndrome current treatment (Use of terlipressin + Albumin) Refractory and persistent shock during or after transplant