Type of Document Dissertation Author Youmans, Scott R URN etd-09232003-010436 Title Increasing The Objectivity Of The Clinical Dysphagia Evaluation: Cervical Ausculatation And Tongue Function During Swallowing Degree Doctor of Philosophy Department Communication Disorders, Department of Advisory Committee
Advisor Name Title Richard J. Morris Committee Chair Gary W. Peterson Committee Member Julie A. G. Stierwalt Committee Member Leonard L. LaPointe Committee Member Keywords
- Undiagnosed Dysphagia
Date of Defense 2003-08-02 Availability unrestricted AbstractBecause of the potentially harmful repercussions of undiagnosed dysphagia, a quick and accurate assessment is necessary to initiate proper treatment as soon as possible. In many
situations and settings, the clinical dysphagia evaluation is the only assessment tool available to the speech-language pathologist for the evaluation of swallowing. Although the clinical
evaluation does provide useful information, it is reportedly insensitive for diagnosing some
forms of dysphagia. Cervical auscultation and measures of tongue function during swallowing
are proposed in this investigation to augment the clinical dysphagia evaluation to improve its
accuracy for diagnosing dysphagia. Prior to diagnosing disordered swallowing, however, it is
necessary to characterize normal swallowing.
One-hundred-and-one healthy participants, ages 20-79, with no history of swallowing impairment participated in this investigation. Participants consumed teaspoon boluses of puree, honey, thin, and soft consistencies while the sounds of swallowing were recorded. Participants also consumed 30 ml boluses of honey and thin consistencies while their peak tongue strengths
Descriptive statistics were calculated and reported for the duration of the acoustic
swallowing signal, the duration to the peak intensity of the signal, the peak intensity of the
signal, the frequency of the peak intensity of the swallow, and the peak frequency of the
swallow, as was the mean peak anterior tongue strength during swallowing. Correlations
between the variables were also computed. Analyses were conducted with data collapsed across
bolus types, as well as for individual bolus consistencies.
The objective of this study was to provide a quantitative characterization of swallowing
acoustics and peak anterior tongue strength in a sample of normal individuals. Overall, results
compared favorably with previous research. Significant correlations were found between the age and the duration variables (positive), age and the intensity variables (negative), the duration variables (positive), the duration to peak intensity and the frequency at peak intensity (negative), the intensity and the frequency variables (positive), and the frequency variables (positive). The current study can serve as a point of reference for future studies, which should further investigate normal swallowing across multiple bolus consistencies and volumes, and eventually compare these measures to those with individuals with disordered swallowing.
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