Document Detail

Accommodation to changes in bolus viscosity in normal deglutition: a videofluoroscopic study.
MedLine Citation:
PMID:  11713919     Owner:  NLM     Status:  MEDLINE    
Videofluoroscopic swallow studies were performed on 60 normal adult volunteers. Swallowing variables were measured during swallows of a 3-cm3 paste bolus and a 3-mL liquid bolus and were compared to identify changes in swallow gesture displacement and timing, as well as changes in bolus movement timing. The study revealed that some differences measured by videofluoroscopy appear to be the result of the inherent bolus characteristics, while others likely represent changes in swallow gestures needed to accommodate variations in bolus viscosity. The overall timing of pharyngeal transit did not vary between bolus types. Oropharyngeal transit trended toward being faster for a liquid bolus with a concurrent early elevation of the aryepiglottic folds. The hyoid bone elevated at the same time, at the same rate, and to the same extent irrespective of bolus viscosity. During a liquid bolus swallow, the hyoid bone trended toward a more prolonged elevation, corresponding to prolonged pharyngoesophageal sphincter opening. The pharyngoesophageal sphincter, however, opened to a greater extent with a paste bolus.
K A Kendall; R J Leonard; S W McKenzie
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Publication Detail:
Type:  Clinical Trial; Journal Article    
Journal Detail:
Title:  The Annals of otology, rhinology, and laryngology     Volume:  110     ISSN:  0003-4894     ISO Abbreviation:  Ann. Otol. Rhinol. Laryngol.     Publication Date:  2001 Nov 
Date Detail:
Created Date:  2001-11-20     Completed Date:  2001-12-07     Revised Date:  2006-05-15    
Medline Journal Info:
Nlm Unique ID:  0407300     Medline TA:  Ann Otol Rhinol Laryngol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1059-65     Citation Subset:  AIM; IM    
Department of Otolaryngotogy-Head and Neck Surgery, University of California-Davis, Sacramento 95817, USA.
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MeSH Terms
Analysis of Variance
Arytenoid Cartilage / physiology,  radiography
Deglutition / physiology*
Esophagus / physiology,  radiography
Hyoid Bone / physiology,  radiography
Middle Aged
Pharynx / physiology,  radiography
Time Factors

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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