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High resolution cervical auscultation signal features reflect vertical and horizontal displacement of the hyoid bone during swallowing

Rebrion, Cédrine (2017) High resolution cervical auscultation signal features reflect vertical and horizontal displacement of the hyoid bone during swallowing. Master's Thesis, University of Pittsburgh. (Unpublished)

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Abstract

Millions of people around the globe suffer from dysphagia (swallowing difficulties) that can lead to malnutrition, aspiration, pneumonia and death. Videofluoroscopy is considered to be the gold standard for assessing and diagnosing dysphagia. In recent years, swallowing cervical auscultation has been suggested as a noninvasive screening method. However, many questions remain open about the physiological source of swallowing auscultation signals. Therefore, the aim of this study is to compare the maximum displacement of the hyoid bone extracted from the videofluoroscopy images during 31 swallows to the signal features extracted from the cervical auscultation recordings captured with a tri-axial accelerometer and a microphone. For cervical auscultation recordings, we have considered features in the time, frequency, and time-frequency domains. From the videofluoroscopy images, we measured the maximal vertical and horizontal displacement of the hyoid bone normalized to an anatomic reference across subjects. Our results have produced several interesting observations. First, the vertical displacement of the anterior part of hyoid bone is related to the entropy rate of the superior-inferior swallowing vibrations and to the kurtosis of the swallowing sounds. Second, the vertical displacement of the posterior part of the hyoid bone is related to the bandwidth of the medial-lateral axis of the swallowing vibrations.
Third, the horizontal displacement of the posterior part of the hyoid bone is related the spectral centroid of the superior-inferior swallowing vibrations. Fourth, the horizontal displacement of the anterior part of the hyoid bone is related to the peak frequency of the medial-lateral swallowing vibrations.
Fifth, a patient's sex is not associated with either vertical or horizontal displacements of the hyoid bone. Sixth, the airway protection scores were associated with the vertical displacement of the posterior part of the hyoid bone, and the command swallow characteristic also affects the maximal horizontal displacement of the posterior part of the hyoid bone.
Additional associations between the patients' characteristics and auscultations signals were also observed. High resolution cervical auscultation may offer a noninvasive alternative to the screening of dysphagia and offer additional diagnostic information.


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Details

Item Type: University of Pittsburgh ETD
Status: Unpublished
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Rebrion, Cédrinecmr130@pitt.educmr130
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee MemberEl-Jaroudi, Amroamro@pitt.edu
Committee MemberMao, Zhi-Hongzhm4@pitt.edu
Thesis AdvisorSejdić, Ervinesejdic@pitt.edu
Date: 25 September 2017
Date Type: Publication
Defense Date: 13 July 2017
Approval Date: 25 September 2017
Submission Date: 21 July 2017
Access Restriction: 5 year -- Restrict access to University of Pittsburgh for a period of 5 years.
Number of Pages: 68
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: Cervical auscultation features, dysphagia, hyoid displacement, signal processing, swallowing.
Date Deposited: 25 Sep 2017 20:33
Last Modified: 25 Sep 2017 20:33
URI: http://d-scholarship.pitt.edu/id/eprint/32854

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