The improvement of consciousness of ischemic-hypoxic coma patients includes the restoration of stable vital signs, gradual reduction of impaired consciousness, and response to external stimuli. 1. Vital signs are stable: for example, heartbeat and respiration return to normal, without the need of external machine-assisted support, these are the signs of stable vital signs. 2. Recovery of impaired consciousness: autonomous activities such as swallowing, opening and closing of eyes, and limb movement, etc. These phenomena indicate that the patient’s state of consciousness is gradually improving. 3. Response to external sound, pain, light and other stimuli: such as call and response, pain stimulation with avoidance action, light stimulation with eye tracking movement. Clinical coma patients have a corresponding rating scale, the doctor will be combined with the rating scale to assess whether the patient’s consciousness has improved, it is recommended to standardize the treatment under the guidance of the physician.