Prediction of Acute Kidney Injury After Cardiac Surgery With Cardiopulmonary Bypass

Acute kidney injury (AKI) is a common and serious complication following cardiac surgery performed under cardiopulmonary bypass and is associated with increased morbidity, mortality, and prolonged hospital stay. Despite advances in perioperative management, the ability to accurately predict postoperative AKI remains limited. Recent evidence suggests that preoperative inflammatory markers derived from routine laboratory tests, as well as indicators of intraoperative perfusion stress, may play an important role in the development of AKI. However, data evaluating these factors together in patients undergoing cardiac surgery with cardiopulmonary bypass are limited. This retrospective observational cohort study aims to investigate the association between preoperative renal function, inflammatory indices, and intraoperative perfusion-related parameters with the development of postoperative AKI. Acute kidney injury will be defined according to the KDIGO serum creatinine criteria within the first 72 hours after surgery. The findings of this study may help identify patients at increased risk for AKI and contribute to improved perioperative risk stratification in cardiac surgery.