The number of elderly patients requiring general anesthesia for major surgical procedures is increasing dramatically. It is estimated that 20% of these patients will develop major complications after surgery. Monitoring brain oxygen saturation may be helpful in reducing the postoperative complication rates. A decrease in brain oxygen is a sign that all other vital organs such as kidneys, heart, liver, and intestines have reduced blood supply and are starved from oxygen. This happens in 1 out of 5 patients undergoing major complex surgeries. Brain oxygen saturation monitor at this time is not used routinely during surgery, primarily due to the added cost, as well as, insufficient evidence that restoring the brain oxygen saturation to baseline would result in better outcomes. Patients will be randomly assigned to either study or control groups. In the study group, a special algorithm will be used to restore brain oxygen saturation. In the control group, the brain oxygen saturation will be monitored continuously, but the monitor screen will be electronically blinded, and standard clinical care applied. The objective of this study is to see if restoring the brain oxygen saturation to baseline results in less complication rates after surgery. The objective of this study is to reduce the incidence of postoperative morbidity due to end organ dysfunction after major non-cardiac surgery in elderly patients. The primary aim is to determine if restoration of rSO2 to baseline levels results in reduced incidence of major organ morbidity and mortality (MOMM). A secondary aim is to determine a cost-effectiveness of this monitoring modality.
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A composite outcome of major end organ dysfunction
Timeframe: Surgery through to 6 months postoperatively