The study by Ling Peng et al., published in the Journal of Cardiothoracic Surgery, investigates the effectiveness of Near-Infrared Spectroscopy (NIRS) combined with the Vascular Occlusion Test (VOT) in predicting acute kidney injury (AKI) in patients undergoing cardiac surgery with cardiopulmonary bypass (CPB). NIRS allows for non-invasive measurement of tissue oxygen saturation (StO2). At the…