He, Qifan
(2019)
The association of high resolution cervical auscultation signal features with hyoid bone displacement during swallowing.
Master's Thesis, University of Pittsburgh.
(Unpublished)
Abstract
Recent publications have suggested that high-resolution cervical auscultation(HRCA) recordings producing combined accelerometric and acoustic signals may provide an alternative, non-invasive option for swallowing assessment. However, the relationship between hyoid bone displacement, a key component to the safe swallowing, and HRCA recordings is not thoroughly understood. Therefore, we investigated the relationship between hyoid bone displacement and HRCA signal features. We hypothesized that HRCA signal features would be associated with aspects of hyoid bone displacement. We measured hyoid bone displacement in horizontal and vertical directions, along with the hypotenuse of displacement, from videofluoroscopy images of 129 single swallows collected from 46 patients, and concurrently recorded vibratory/acoustic signals produced during these swallows. Our results showed that the vertical displacement of both the anterior and posterior landmarks of the hyoid bone were strongly associated with the Lempel-Ziv complexity of superior-inferior and anterior-posterior swallowing vibrations from HRCA signals. Horizontal and hypotenuse displacements of the posterior aspect of the hyoid bone were strongly associated with the standard deviation of swallowing sounds from HRCA signals. Medial-Lateral swallowing vibrations and patient characteristics such as age, sex and history of stroke were not significantly associated with aspects of hyoid bone displacement. The results imply that some vibratory and acoustic features extracted from HRCA recordings can provide information about the magnitude and direction of hyoid bone displacement. These results provide additional support for using HRCA as a non-invasive tool to assess physiological aspects of swallowing such as hyoid bone displacement. Future research should explore associations between HRCA signals and other swallow kinematic events such as laryngeal vestibular closure, upper esophageal sphincter opening and initiation of the pharyngeal swallow to improve the use of HRCA for assessment of swallowing and biofeedback during dysphagia therapy.
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Details
| Item Type: |
University of Pittsburgh ETD
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| Status: |
Unpublished |
| Creators/Authors: |
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| ETD Committee: |
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| Date: |
23 January 2019 |
| Date Type: |
Publication |
| Defense Date: |
14 November 2018 |
| Approval Date: |
23 January 2019 |
| Submission Date: |
15 November 2018 |
| Access Restriction: |
5 year -- Restrict access to University of Pittsburgh for a period of 5 years. |
| Number of Pages: |
67 |
| Institution: |
University of Pittsburgh |
| Schools and Programs: |
Swanson School of Engineering > Electrical and Computer Engineering |
| Degree: |
MS - Master of Science |
| Thesis Type: |
Master's Thesis |
| Refereed: |
Yes |
| Uncontrolled Keywords: |
High resolution cervical auscultation, swallowing accelerometry, swallowing sounds, dysphagia, signal processing, hyoid displacement |
| Date Deposited: |
23 Jan 2019 16:18 |
| Last Modified: |
23 Jan 2024 06:15 |
| URI: |
http://d-scholarship.pitt.edu/id/eprint/35538 |
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