声の高さの異常に対する手術

概要

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Patients with vocal pitch problems were treated surgically.Section of the cricothyroid muscle in one case and the thyroplasty type III operation in four cases were performed to lower the pitch. The thyroplasty type III operation means shortening of the antero-posterior distance of the thyroid ala by vertical strip excision to relax the vocal cord. The effects of surgery were remarkable. All these cases were mutational voice disorders which had resisted conservative treatment such as voice training, long psychotherapy or hypnosis. It is not advisable to administer long conservative treatment to such patients, and operative treatment is strongly advocated.The thyroplasty type IV operation was performed in nine cases to increase the vocal pitch. In this operation, the antero-posterior distance of the larynx is lengthened by crico-thyroid apprpximation or antero-posterior enlargement of the thyroid ala. In all of the nine cases, which contained five androphonias, the pitch increment obtained was substantial. Especially for androphonia which is said to be irreversible, crico-thyroid approximation was an effective and reliable operation.
耳鼻咽喉科臨床学会の論文