After the car accident in August+June, 65438, my father had a craniotomy, which lasted for three months and then healed for more than a month. What happened?

First of all, it shows that tracheotomy is an emergency operation and a last resort. Because emergency tracheotomy is needed during craniotomy after a car accident to prevent patients from breathing difficulties or insufficient oxygen supply (even oxygen supply through nasal catheter will not help), this is very correct, but the risk of tracheotomy and the accompanying surrounding tissue damage are very high, such as injury to recurrent laryngeal nerve, superior laryngeal nerve and large cervical vessels. When the blood supply vessels of the muscles of the larynx and pharynx are damaged, epiglottis and insufficient blood supply to the nerves caused by sound will lead to inability to speak, vocal cord atrophy, adhesion, etc., which may lead to inability to speak. When unilateral recurrent laryngeal nerve and superior laryngeal nerve are injured, it will lead to hoarseness, bilateral recurrent laryngeal nerve injury will lead to dyspnea and bilateral superior laryngeal nerve injury will lead to loss of voice. Another reason may be that the language center is damaged during intracranial hemorrhage, resulting in pronunciation but inability to speak (aphasia). Therefore, considering that your father is caused by the above reasons, you should consult your competent doctor in detail. I hope I can help you and wish your father a speedy recovery!