ASA 129th Meeting - Washington, DC - 1995 May 30 .. Jun 06

5pSC34. Exit jet particle velocity in the in vivo canine laryngeal model.

Steven Bielamowicz

Gerald S. Berke

Jody Kreiman

Bruce R. Gerratt

UCLA Div. of Head and Neck Surgery, UCLA School of Medicine, CHS 62-132, Los Angeles, CA 90024

This study extends the previous work on exit jet particle velocity in an in vivo canine laryngeal model of phonation [G. S. Berke et al., J. Voice 3, 306--313 (1989)]. In both the previous and the current study, a hot-wire anemometer was used to measure air particle velocity in the midline of the glottis at anterior, intermediate, and posterior positions. Simultaneous measurements of subglottal pressure, EGG, and PGG were also obtained. In the previous study, these measures were obtained with constant levels of recurrent laryngeal nerve (RLN) and superior laryngeal nerve (SLN) stimulation. In the current study, exit jet particle velocity profiles were obtained across multiple levels of RLN and SLN stimulation. Exit jet particle velocity was also measured at midline and off-midline positions with constant levels of RLN and SLN stimulation. The time-varying features of exit jet particle velocity as a function of subglottal pressure and glottal vibratory events will be presented.