Abstract
Peak velocity, distance, and time of laryngeal elevation during swallowing were measured with a laryngeal motion measurement system in eight healthy young adult men in their 20 and 30 s (33.0 ± 4.3 years) and ten healthy older men in their 60 and 70 s (74.0 ± 3.9 years). The participants performed swallowing five times each for a total of eight conditions: two bolus types (saliva and water) and four swallowing methods (normal swallow, effortful swallow, super-supraglottic swallow, and Mendelsohn maneuver). When the bolus type was saliva, peak velocity and distance increased more for swallowing maneuvers (effortful swallow, super-supraglottic swallow, and Mendelsohn maneuver) than for normal swallow. On the other hand, when the bolus type was water, there was no difference in peak velocity or distance between normal swallow and swallowing maneuvers. In healthy older men, distance was greater with Mendelsohn maneuver than with normal swallow, and peak velocity was increased with swallowing maneuvers than with normal swallow. Healthy young adult men had increased peak velocity and distance with water rather than saliva. The increase in peak velocity and distance obtained by swallowing maneuvers was influenced by age and bolus, suggesting that the subjects and conditions used are important in terms of promoting safer oral intake.
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Data Availability
The datasets generated and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Acknowledgements
The authors acknowledge the participants of this study for their time, patience, and cooperation. We thank Prof. Go Mizumoto (Kumamoto Health Science University) for confirmation of the statistical methods used in this study.
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This work was supported by Grant-in-Aid for Scientific Research (KAKENHI 23K10444).
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Conceptualization: FO; Methodology: FO and MFK; Formal analysis and investigation: FO and KW; Writing and original draft preparation: FO; Writing, reviewing, and editing of the manuscript: MFK and TY; Funding acquisition: FO.
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Omori, F., Fujiu-Kurachi, M., Wada, K. et al. Effects of Bolus Types and Swallowing Maneuvers on Laryngeal Elevation: Analysis of Healthy Young Adult Men and Healthy Older Men. Dysphagia (2023). https://doi.org/10.1007/s00455-023-10638-2
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DOI: https://doi.org/10.1007/s00455-023-10638-2