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Radiol Phys Technol. 2019 Nov 30. doi: 10.1007/s12194-019-00547-1. [Epub ahead of print]

Evaluation of swallowing movement using ultrasonography.

Author information

1
Division of Speech-Language-Hearing Therapy, Department of Rehabilitation Sciences, Faculty of Allied Health Sciences, Kansai University of Welfare Sciences, 3-11-1 Asahigaoka, Kashiwara, Osaka, 582-0026, Japan. matuo.takao@gmail.com.
2
Department of Oral Health Care and Rehabilitation, Doctor's Course of Oral Health Science, Graduate School of Oral Sciences, Tokushima University, 3-18-15 Kuramoto-cho, Tokushima, Tokushima, 770-8504, Japan. matuo.takao@gmail.com.
3
Department of Oral Health Care and Rehabilitation, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto-cho, Tokushima, Tokushima, 770-8504, Japan.
4
Division of Speech-Language-Hearing Therapy, Department of Rehabilitation Sciences, Faculty of Allied Health Sciences, Kansai University of Welfare Sciences, 3-11-1 Asahigaoka, Kashiwara, Osaka, 582-0026, Japan.

Abstract

The aim of this study is to develop an index to assess swallowing function by ultrasonography to evaluate the relationship between movements of the hyoid bone and the larynx while swallowing water. Forty-two younger participants (mean age, 20.3 ± 3.4 years) and 42 older participants (mean age, 75.1 ± 10.6 years) with normal swallowing function were included in the study. Movements of the hyoid bone and the larynx while swallowing 5 mL of water were observed using ultrasonography. Two-dimensional distances from the starting points of the hyoid bone and the larynx to their points of maximum movement were measured as displacements. The hyoid bone-laryngeal motion ratio was defined as the hyoid bone displacement divided by the laryngeal displacement. Parameters were compared among four groups: younger male, younger female, older male, and older female. The hyoid bone displacement differed significantly between the younger and older groups, and the laryngeal displacement differed significantly between age groups and sexes. The hyoid bone-laryngeal motion ratio was not significantly correlated with age, height, or body weight, and did not show a significant difference between the four groups. Thus, the hyoid bone-laryngeal motion ratio is an index that evaluates swallowing movement and is independent of physique and physiological changes associated with aging.

KEYWORDS:

Hyoid bone; Hyoid bone–laryngeal motion ratio; Laryngeal movement; Swallowing movement; Ultrasonography

PMID:
31786806
DOI:
10.1007/s12194-019-00547-1

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