Collagen injection into the vocal folds with the use of a flexible fiberscope

• Published in: OTOLOGIA FUKUOKA Vol. 37; no. 1; pp. 40 - 45
• Main Authors: INOUYE, Tetsuzo, TAKAYAMA, Etsuyo, KITAHARA, Satoshi, FUKUDA, Hiroyuki
• Format: Journal Article
• Language: Japanese
• Published: JIBI TO RINSHO KAI 20.01.1991
• Subjects: flexible fiberscope; stroboscope; vocal rehabilitation; 声帯内コラーゲン注入術
• ISSN: 0447-7227; 2185-1034
• DOI: 10.11334/jibi1954.37.1_40

Injectable collagen has been used for vocal fold augmentation in human subjects because it has been shown to be efficacious in relieving glottic insufficiency. The application of a bioimplant material for this purpose raises the question of the permanence of the correction. Injectable collagen has been shown to undergo some degree of resorption. Injection of 3% atelo-collagen (Koken Co.) has been conducted in 9 cases of sulcus vocalis. One of nine patients required re-injection only 2 months after the first treatment. We employed a flexible therapeutic laryngofiberscope for the second injection. This technique was available in a case which required short term re-injection of collagen because of its resorption and could be done under local anesthesia without hospital admission.