Electrical pacing of vocal cord adduction in unilateral recurrent nerve paralysis.

概要

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Electrical pacing of vocal cord adduction was attempted in five dogs. Unilateral recurrent laryngeal nerve of each dog was artificially paralyzed. Electromyographic activity of the cricothyroid muscle was detected, amplified, and used as a trigger of vocal cord adduction. It was interfaced with a muscle stimulator attached to an electrode which was placed in the paralyzed laryngeal adductor muscles (thyroarytenoid muscle and lateral cricoarytenoid muscle). Under electrical pacing, the movement of vocal cords was videotaped simultaneously with electromyographic discharge of the trigger muscle, trigger-on time, and voice.Electrically paced adduction of the paralyzed vocal cord, synchronous with phonation, was clearly demonstrated. This represents a preliminary step in the development of an alternative approach to the patient with unilateral recurrent laryngeal nerve paralysis.
耳鼻咽喉科臨床学会の論文