Hello and thanks for the query
The most commonly injured nerve in carotid tumor
surgery is the superior laryngeal nerve
. The patient postoperatively might suffer from some degree of aspiration and voice changes (inability to create high-pitched sounds) as you are suffering from.
The recovery depends upon the type of injury
whether it is temporary or permanent. Usually the injury recovers in nine months of the procedure or you can say we wait for nine months before going for any other options. If it does't recover than we go for alternate treatment like laryngeal electromyography
So don't worry and hope for the best.