AKI that occurs in critically ill patients in the ICU is associated with high mortality and significant morbidity. Methods: This study was an observational analytic study with a case-control survey study design without machining to assess the relationship between serum PCT levels and the incidence of AKI in critically ill patients admitted to the intensive care unit (ICU). This research was conducted at Haji Adam Malik General Hospital Medan from January-December 2020. The parameters measured were Procalcitonin (PCT) and Acute Kidney Injury (AKI). Results: From 80 patients with 52 patients without AKI and 28 patients with AKI, patients with high PCT values (more than 1.575 ng/ml) were 14.93 times more likely to have AKI than those with low PCT values (less than 1.575 ng/ml) ). There is a relationship between serum PCT levels and the incidence of AKI in critically ill patients admitted to the intensive care unit (ICU) with a strong positive correlation. Conclusion: High procalcitonin is more common in critically ill patients with AKI compared to those without AKI who are admitted to the ICU.

Keywords : AKI, Procalcitonin, Critical Patient in ICU