Delirium after cardiac surgery is reported in a range of 3-47% of patients. Delirium is a serious complication that results in prolonged length of stay, increased health care costs and is associated with higher death rates. The exact cause involved in the development of delirium after cardiac surgery is unclear. The latest advancement in near-infrared spectroscopy (NIRS) Oximetry offers real-time management of patients at risk of brain injury. This approved device will monitor cerebral oxygenation during and 24hr after cardiac surgery, recording oxygenation in real time allowing the clinical team the opportunity to intervene early to prevent ischemia and possibly preventing untoward events. Adverse events followed include, but are not limited to, stroke, (transient ischemic attacks), heart attack, (myocardial infarction), clots found in lungs (pulmonary embolism), kidney failure, pneumonia, cause of death for 30-days after surgery (all cause mortality).