The Relationship between UES Distension and Laryngeal ShorteningCasilli, Samantha (2024) The Relationship between UES Distension and Laryngeal Shortening. Master's Thesis, University of Pittsburgh. (Unpublished)
AbstractAims: We sought to determine whether correlations exist between UES distension (UESD) and laryngeal shortening (LS) in a patient group and healthy population, and whether there were clinically and statistically significant differences in LS and UESD between these groups. Methods: Forty-seven inpatients referred for videofluoroscopic (VFSS) assessment due to clinical evidence or suspicion of dysphagia, and 47 healthy age-matched controls underwent standard VFSS examination. The maximal distention of the UES and the displacement of the laryngeal framework toward the hyoid, called laryngeal shortening (LS), were measured on each frame of each swallow event. Results: There were no significant correlations between LS and UESD in either patients (p = 0.58) or healthy participants (p = .94). UESD was statistically and clinically greater (p<0.0001; d= -1.0, large effect) in patients than healthy participants. Conversely, patients exhibited statistically and clinically less LS than healthy participants (p=0.001; d=0.67 moderate effect). Conclusion: UESD and LS were not correlated as hypothesized, however, the clinically significant differences between LS and UESD in patients and healthy participants suggest that LS may be affecting other aspects of the swallow. Limitations include a small sample size and a limited number of swallows per participant. Clinical implications of the results will be discussed. Share
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