Study of the Evolution Profile of the Renal Doppler in the Perioperative Hepathic Transplantation

Inclusion Criteria: * Patient of full age (≥18 years) * Patient operated on at the HUS for a liver transplant, between July 1, 2019 and June 30, 2020. * Patients having undergone an evaluation of hepatic and renal vascular profiles perioperatively. * Patients hospitalized in the surgical intensive care unit after hepatic transplant surgery. * Patient not having expressed, after information, the reuse of his data for the purposes of this research Exclusion Criteria: * Patient who expressed his opposition to participating in the study * Patient with suspected obstructive acute renal failure * Stenosis of renal arteries known at the time * End-stage renal disease on dialysis * Impossibility of giving the subject informed information (difficulties in understanding the subject, etc.) * Subject under safeguard of justice