The effects of phonosurgery on laryngeal vibration: Part I. Theoretic considerations.
Surgical manipulation of the laryngeal framework (phonosurgery) is rapidly gaining interest and attention. To date, however, a comparative objective evaluation of the various phonosurgical techniques has not been reported. A theoretic model of the larynx, a four-mass model based on the work of Ishizaka (J Acoust Soc Am 1976;60:1193-8) and Koizumi et al. (J Acoust Soc Am 1987;82:1179-92), was developed and adapted to simulate laryngeal biomechanical behavior, as understood by current research. The model was then applied to a comparative evaluation of phonosurgical techniques. Input parameters that correlate laryngeal function and model simulation were developed. Surgical procedures were categorized according to their effect on these parameters. A model simulation of these techniques allowed comparison and prediction of the results of phonosurgery and a better understanding of the issues involved with surgical alteration of the voice.
Smith
M E
ME
Division of Head and Neck Surgery, University of California, Los Angeles.
Berke
G S
GS
D003198:Computer Simulation; D005931:Glottis / Q000502:physiology / Q000503:physiopathology; D006801:Humans; D007830:Larynx / Q000502:physiology / Q000503:physiopathology / Q000601:surgery*; D008297:Male; D010699:Phonation / Q000502:physiology; D014826:Vocal Cord Paralysis / Q000503:physiopathology / Q000601:surgery; D014827:Vocal Cords / Q000502:physiology / Q000503:physiopathology; D014832:Voice Disorders / Q000601:surgery; D014833:Voice Quality