You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is A 60 year old female patient underwent modified radical mastectomy under general anesthesia. She is very anxious preoperatively. What monitor anesthetist might have used during surgery so that she does not remember anything intraoperative event. and explain in detail?
Monitors used to assess depth of anesthesia: Electroencephalography (EEG) Bispectral index (BIS) Entropy Evoked responses (EP) - Motor EP, sensory EP (Auditory, visual, brain stem evoked potential) Patient safety index Narcotrend The bispectral index (BIS) is an empirically derived scale which helps to monitor the depth of anesthesia and intraoperative awareness. It processes the EEG and provides an index value between 0 and 100 that indicates the patient's level of consciousness. BIS index values range: 100 - Awake (Responds to normal voice) 0 - Flatline EEG (Deep coma) Recommended range of BIS index values for anesthesia- 40-60.