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I have been treated for discogenic disc disease for many years. It progressed from my lumbar to my cervical spine. I have received many epidurals and an RFA procedure for my lumbar spine in the past. They have been helpful. I recently had an MRI of my cervical spine and epidurals were suggested. After two epidurals, several weeks apart, an RFA procedure was performed on my neck. During the procedure I felt heavy breathing and nauseusness. The procedure was stopped before being complete and immediately afterward I had difficulty talking, coughing, and swallowing. An examination by an ENT specialist indicted damage to the nerve controlling one of my vocal cords leaving the vocal cord paralyzed.
Is this a predictable side effect? If not, what can cause it?