Management of vagus nerve injury after carotid endarterectomy

Background. Inadvertent injury to the vagus nerve ol its branches during carotid endarterectomy can result in adductor vocal cord paralysis (hoarseness) and cricopharyngeal dysfunction (dysphagia in) with aspiration, known as ''double trouble.'' This study describes our experience in the management of this complication in cases where conservative treatment failed. Methods. All patients were examined by a vascular surgeon, a head and neck surgeon, and a speech therapist. Their examinations included comprehensive speech evaluation, video stroboscopy, video fluoroscopy, and methylene blue testing for aspiration. All patients underwent Teflon injections to medialize the paralyzed vocal cord and a cricopharyngeal myotomy to restore swallowing and alleviate aspiration. Results. Fourteen patients, eight men and six women, were treated. The duration of dysfunction was 24 weeks in two patients, 6 weeks in four patients, 4 weeks in three patients, and I week In five patients. Five patients had severe dysfunction (defined as difficulty in swallowing both solid and liquid foods with more than 20% aspiration), seven patients had mode-ate dysfunction (defined as difficulty swallowing solid food with aspiration of less than 20%), and two patients had mild dysfunction (defined as difficulty in swallowing solids but with no aspirations). After the Teflon injections and myotomy, 13 of 14 patients had satisfactory outcomes, including normal voice and swallowing. Conclusions. Vagus nerve injury from a carotid endarterectomy can be a debilitating complication. Prevention, early recognition, and prompt correction of these injuries are important in the management of this complication.