Definition of vegetative survival state and clinical diagnostic criteria: ① Self unconsciousness, no response to the outside world. ②No mental-behavioral response to visual, auditory, touch and harmful stimuli. ③No communication and expression ability. ④The sleep-eye opening cycle exists. ⑤ Hypothalamus and brainstem functions are still preserved (breathing, heartbeat, blood pressure, etc.). (6) Urinary and fecal incontinence. (7) Cranial nerve and spinal cord reflexes exist but are prone to change, while EEG activity and brainstem evoked potentials exist. Internationally, the “vegetative state” is divided into three types: those within one month are called “temporary vegetative state”; those lasting from one month to one year are called “persistent vegetative state “; more than a year is called “permanent vegetative state”. The so-called “vegetative state” means that the patient is in a persistent vegetative state. Diagnostic criteria for “vegetative state”: In mid-April 1996 in Nanjing, famous domestic neurosurgery and emergency medicine experts first formulated the diagnostic criteria for patients in vegetative state – “vegetative state”: ① loss of cognitive function, no conscious activity, inability to execute instructions, ② maintenance of autonomic breathing and blood pressure, ③ sleep cycle, ④ inability to understand or express language, ⑤ ability to open eyes automatically or under stimulation, ⑥ may have purposeless eye tracking movement, ⑦ Subthalamic and brainstem functions are basically preserved