Laryngomicrosurgery

Abstract

Laryngomicrosurgery has been successfully employed in japan for pathological diagnosis and for treatment of laryngeal lesions during last 30 years. Recently, microsurgery in the larynx become more important meanings not only for removal of vocal lesions but also for recovery of vocal movements as one of the phonosurgery.
In this presentation, 2493 patients with laryngeal lesions were examined under the endlaryngeal microsurgery. They were mainly performed this operation under modified N. L. A. (80%), others under endtracheal anesthesia (20%) including the children.
Pathological findings of laryngeal lesions were classified into inflammatory changes of 3228 tissues, begin tumors of 182, and carcinomas of 467 cases respectively. These patients were tested their phonatory function by the use of PS-77 Phonatory equipment pre and post operation. As the parameters, maximum phonation time, mean flow rate, air flow rate at easy phonation for several seconds. and vocal velocity index were compared with pre and post operative function on the viewpoint of surgical techniques shown on the TV.
From this result, important points for phonosurgery are to keep clear operative fields and to check the vocal vibrations during operation and never remove the excess mass especially in lower lip of the cords.