How long a 90-year-old man with cerebral infarction can live in a coma varies from person to person and cannot be generalized. Generally speaking, 90-year-old people suffering from cerebral infarction coma phenomenon represents a more serious condition, if sent to the hospital in time, through timely and effective treatment, the patient’s prognosis can be improved, the survival time can also be extended. However, if the infarction area of the elderly is relatively large, or the body itself has some underlying diseases, then with the development of the condition, it may lead to the emergence of a variety of complications, thus causing multi-organ failure, which is very unfavorable to the treatment, and may lead to the death of the patient. Therefore, how long an elderly person can live after coma of cerebral infarction depends on the actual situation of the patient, according to his physical state and the severity of the disease to make a comprehensive judgment, and can not be generalized. It is recommended to send the patient to the doctor in time and follow the doctor’s instructions to prolong the patient’s life as long as possible.