Sonographic assessment of swallowing in irradiated nasopharyngeal carcinoma patients
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AbstractObjectives/Hypothesis
Ultrasonography is an emerging clinical tool to study the dysfunction of swallowing muscles. This was the first sonographic study to assess the relationship between suprahyoid muscle contraction, hyoid bone displacement, and penetration‐aspiration status (PAS) during swallowing in nasopharyngeal carcinoma (NPC) patients treated with radiotherapy (RT). The study also aimed to establish reliability data for the sonographic technique described.

Study Design
Cross‐sectional study.

Methods
Geniohyoid muscle contraction was quantified using brightness‐mode ultrasonography in this study of 40 post‐RT NPC patients. A series of physiological parameters and PAS were measured using videofluoroscopy.

Results
Intra‐ and inter‐rater agreement values ranged from 0.75 to 0.96 across various sonographic measurements. Percentage increase in the cross‐sectional area of the geniohyoid muscle correlated with anterior (r = 0.42, P < .05) but not superior (r = 0.27, P = .09) hyoid displacement. Anterior hyoid displacement and pharyngeal constriction ratio were significantly associated with PAS score.

Conclusions
Sonographic measurement of suprahyoid muscles provides valuable information on muscle function and is potentially a useful clinical tool in swallowing assessment. Further research is needed to refine the role of this examination in dysphagia.
Acceptance Date15/03/2018
All Author(s) ListDennis T. H. Cheng, Kathy Y. S. Lee, Anil T. Ahuja, Michael C. F. Tong
Journal nameLaryngoscope
Year2018
Month11
Volume Number128
Issue Number11
PublisherWiley
Pages2552 - 2559
ISSN0023-852X
LanguagesEnglish-United States
KeywordsDysphagia, nasopharyngeal carcinoma, ultrasonography, suprahyoid muscles, hyoid bone

Last updated on 2020-05-07 at 00:57