Sleep anesthesia, also known as simple intravenous anesthesia, refers to the intravenous application of sedative or analgesic type of anesthetic drugs alone, which causes the patient to experience physiological sleep without affecting the patient’s breathing, that is, the patient is able to breathe on his or her own. Sleep anesthesia is only applicable to outpatient examination or outpatient minor surgery, and the patient can open his eyes when the outpatient surgery operation is over and go home after awakening for a period of time. General anesthesia refers to the intravenous application of sedative, analgesic or muscarinic anesthetic drugs to make the patient lose consciousness, pain and muscle relaxation, then tracheal intubation is performed, and intraoperative anesthesia is maintained, and the depth of anesthesia maintenance needs to meet the requirements of surgery. After the patient is conscious, can respond to the call and the tidal volume is normal, the patient can be extubated and returned to the ward.