4. Discussion
BS is an EEG pattern which is caused by various etiologies and has a poor outcome.Oxygen consumption and supply in the brain tissues are considered to be important indicators of normal aerobic metabolism in the brain. Indeed, monitoring the supply and demand balance of cerebral oxygen during surgical anesthesia is helps protect the brain.The findings of Tang et alThere were some limitations in this study. First, our results were based on a small sample; the results should be verified in a larger population. Second, the cerebral protective mechanism is still not clear, and further research is needed.