Abstract
Purpose
Hyolaryngeal excursion (HE) is typically assessed via palpation during clinical swallowing exams (CSE) or visually during videofluoroscopy (VFSS). Minimal evidence exists to support the use of these perceptual methods for judging HE. We investigated whether binary judgment of HE differentiates quantitative measures of hyoid movement, using frame-by-frame VFSS analysis to measure anatomically scaled peak hyoid positions.
Methods
Medical records of patients who received a CSE and VFSS within a 24-h period were reviewed. Clinician ratings of HE (‘reduced’ or ‘normal’) were collected from CSE and VFSS reports, along with rater experience. Five ml puree swallows were extracted from each VFSS for randomized, blinded analysis. Peak hyoid position from C4 was captured in anterior, superior, and hypotenuse positions and expressed relative to C2–C4 length. T-test comparisons of hyoid positions between patients judged to have reduced versus normal HE on palpation and VFSS were conducted.
Results
Eighty-seven patients (56 male, mean age 61) met criteria. Peak anterior hyoid position was significantly different between patients judged to have reduced (mean = 89.2% C2–C4) and normal (mean = 110.6% C2–C4) HE on palpation (p = 0.001). Further analysis revealed no effect of clinician experience on differentiation of objective measures based on palpation. No differences were found across any objective measures when compared to clinician VFSS ratings.
Conclusions
Clinicians appeared to be able to differentiate peak anterior hyoid movement but not superior or hypotenuse movement on palpation. On VFSS visualization, no significant differences were found between swallows judged to have reduced versus normal HE in any directional dimension. While perceptual methods may contribute to clinical decision-making, clinicians should remain cautious when making judgments about HE using these methods.
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Change history
16 September 2020
This letter notifies the readers of the Dysphagia journal of an error in the original published version of this manuscript, for which a previously available open source spreadsheet tool had been used to calculate the position of the hyoid bone or larynx on lateral view videofluoroscopic images. An error in the mathematical formula built into the spreadsheet resulted in a reversal of the results for the X and Y planes of measurement. This erratum provides corrections to the results and interpretations of the original manuscript.
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Acknowledgements
The authors would like to thank James C. Borders for his assistance during data collection, Glen Leverson and Sharon Weinberg for their assistance during data analysis, and the speech-language pathologists at UW-Madison Voice and Swallow clinics. Portions of this work were presented at the 2018 Dysphagia Research Society meeting.
Funding
Diane M. Bless Endowed Chair in Otolaryngology, University of Wisonsin-Madison.
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The research conducted by the first author was supported by funding from the Diane M. Bless Endowed Chair in Otolaryngology. The authors declare no conflict of interest to disclose.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the Institutional Review Board and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
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Informed consent was waived with IRB approval for retrospective medical chart review data collection.
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Brates, D., Molfenter, S.M. & Thibeault, S.L. Assessing Hyolaryngeal Excursion: Comparing Quantitative Methods to Palpation at the Bedside and Visualization During Videofluoroscopy. Dysphagia 34, 298–307 (2019). https://doi.org/10.1007/s00455-018-9927-2
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DOI: https://doi.org/10.1007/s00455-018-9927-2