How long a patient in a deep coma from a car accident will be awake after surgery is usually indeterminate and varies relatively widely from patient to patient. Patients in deep comas from car accidents are often accompanied by severe craniocerebral injuries, cerebral contusions, or diffuse axonal injuries. Generally after surgery they are still not out of a life-threatening situation. With active treatment, some patients will regain consciousness, but the time to wake up varies greatly, days, weeks, months or even a long period of coma is possible. If the postoperative review of head CT shows good intracranial healing, no midline shift, less swelling of brain tissue, and some basic physiological reflexes, then the patient has a higher probability of early awakening. If the patient has severe cerebral edema, a larger range of brain damage, and is unable to respond to external stimuli, the prognosis is usually worse and the probability of awakening is lower. How long a patient in a deep coma after craniotomy in a car accident will be awake is mainly related to the degree of brain damage, and you can consult a neurosurgeon for details.