Use of Vasopressin in Patients at High Risk of Acute Kidney Injury Admitted to the ICU

Inclusion Criteria: * Adult patients (≥18 years old); * Admitted to intensive care units; * Predicted risk of acute kidney injury calculated based on clinical and laboratory data at ICU admission and is considered eligible if the value in the calculator is equal or greater than 5 points; Exclusion Criteria: * Time since admission to the ICU greater than 24 hours; * Use of vasopressors at the time of inclusion; * MAP \>90 mmHg; * Hyponatremia (\<130 mmol/L); * Severe TBI with Glasgow Coma Scale \< 8; * Elective surgeries; * Dialysis chronic kidney disease or acute kidney injury who received renal replacement therapy upon admission or are expected to receive renal replacement therapy within the next 24 hours; * Suspected or confirmed acute mesenteric ischemia; * Prospect of death in less than 24 hours; * Medical team not committed to full investment at the time of inclusion; * Prior inclusion in the study; * Pregnancy.