Immediate Effects of Straw Phonation in Air or Water on the Laryngeal Function and Configuration of Female Speech-Language Pathology Students Visualised with Strobovideolaryngoscopy: A Randomised Controlled Trial

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Autor/inn/en	Meerschman, Iris; D'haeseleer, Evelien; Kissel, Imke; De Vriese, Casper; Tomassen, Peter; Dochy, Frederick; Pieters, Kaat; Claeys, Sofie; Sataloff, Robert; Van Lierde, Kristiane
Titel	Immediate Effects of Straw Phonation in Air or Water on the Laryngeal Function and Configuration of Female Speech-Language Pathology Students Visualised with Strobovideolaryngoscopy: A Randomised Controlled Trial
Quelle	In: International Journal of Language & Communication Disorders, 58 (2023) 3, S.944-958 (15 Seiten) PDF als Volltext Verfügbarkeit
Zusatzinformation	ORCID (Meerschman, Iris) ORCID (D'haeseleer, Evelien)
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1368-2822
DOI	10.1111/1460-6984.12838
Schlagwörter	Speech Language Pathology; Allied Health Personnel; Allied Health Occupations Education; College Students; Females; Human Body; Physiology; Motor Reactions; Articulation (Speech) + Suchen Sie Ihr Suchwort? Collegestudent; Weibliches Geschlecht; Menschlicher Körper; Physiologie
Abstract	Background: A promising way to obtain vocal economy and efficiency is by semi-occluding the vocal tract while phonating. Current knowledge about the immediate effects of semi-occluded vocal tract (SOVT) phonation on the laryngeal function and configuration is based mainly on computer modelling or excised larynges studies. In in vivo SOVT studies, electroglottography (EGG) has been the most commonly used laryngeal outcome, showing contradictory results between studies. Therefore, exploring these aspects by direct visualisation of the human larynx during SOVT phonation using strobovideolaryngoscopy (SVL) is needed. Aims: The aim of this study was to investigate and compare the immediate effects of straw phonation (SP) in air, SP in 2 cm water, and SP in 5 cm water (with stirring straws), on the laryngeal function and configuration of a homogeneous group of vocally healthy female speech-language pathology students, visualised with flexible SVL. Methods & Procedure: A randomised controlled trial was used. Fifty-two female speech-language pathology students (mean age: 18.7 years, SD: 0.6) were assigned randomly to one of three experimental groups or a control group: (1) SP in air, (2) SP in 2 cm water, (3) SP in 5 cm water or (4) [u] phonation with similar soft onset and slightly pursed lips as in SP but without a straw (control group). The participants underwent flexible SVL during habitual [u] phonation, followed by the specific SOVT exercise of their group assignment. All video samples were evaluated randomly and blindly by two experienced investigators using the Voice-Vibratory Assessment with Laryngeal Imaging (VALI) rating form, first independently and then by consensus. Outcome & Results: Compared to habitual phonation, the vibrational amplitude decreased during SP in 5 cm water and SP in 2 cm water, being more prominent in the first, more flow-resistant exercise. The mucosal wave also decreased during SP in 5 cm water. The anteroposterior (AP) supraglottic compression similarly increased during SP in air, SP in 2 cm water, and SP in 5 cm water. Further, a rise in mediolateral (ML) compression and a decrease in phase symmetry and regularity were found during SP in 2 cm water. A similar decrease in regularity was observed during SP in 5 cm water. Conclusions & Implications: Both SP in air and SP in water cause positive immediate laryngeal effects for voice training opportunities. More AP supraglottic activity found during each SP exercise might indicate epilarynx narrowing, an economic phenomenon associated with SOVT. Immersing the straw in water additionally diminished the vibrational amplitude, lowering vocal fold impact stress and risk for phonotrauma during the exercise. The decreased regularity of the vibrational cycles during SP in water might be due to the varying back pressure created by the water bubbling. The impact of SP in water on ML supraglottic compression needs further investigation. (As Provided).
Anmerkungen	Wiley. Available from: John Wiley & Sons, Inc. 111 River Street, Hoboken, NJ 07030. Tel: 800-835-6770; e-mail: cs-journals@wiley.com; Web site: https://www.wiley.com/en-us
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2024/1/01