Evaluation of the Frequency of Kidney Injury in the Postoperative Critical Care Unit (PACU): A Prospective Observational Study

Background: In the study, the frequency of postoperative acute kidney injury (AKI), factors associated with AKI, and the effect of AKI on outcomes in surgical cases treated in the Postoperative intensive care unit (PACU) in the postoperative period were investigated. Materials and Method: The study is a prospective and observational study. Surgical cases treated in the PACU in the postoperative period were included in our study. Demographic characteristics of the patients, characteristics of the operation and anesthesia, Charlson Comorbidity Index (CCI) values, American Society of Anesthesiologist (ASA) risk classes, preoperative biochemistry results and preoperative hemogram results were recorded. Patients' AKI was assessed using the Risk, Injury, Failure, Loss of Function, and End-Stage Renal Disease (RIFLE) and Acute Kidney Injury Network criteria(AKIN). Results: 583 postoperative cases were examined. The frequency of AKI in PACU was 17,7%. Age, preoperative CCI, BUN, GFR values, preoperative peptic ulcer history, preoperative calcium, total bilirubin levels and the urgency of operation were the preoperative reasons for AKI. Intraoperative use of blood and colloid also affected postoperative AKI. There was a relationship between AKI and the amount of crystalloid and FFP used in PACU. In patients with AKI, the frequency of inotropic use in PACU, the frequency of the use of IMV and the duration, cardiac complication, arrhythmia, respiratory system complications, sepsis and mortality rate were higher compared to patients without AKI (p