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Initiation and duration of laryngeal closure during the pharyngeal swallow in post-stroke patients.
MedLine Citation:
PMID:  19760459     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
As a bolus enters the pharynx during the swallow, the airway is protected by laryngeal closure, a process characterized by approximation of the vocal folds plus approximation of the arytenoid cartilages to the base of the epiglottis. The purpose of this study was to measure initiation of laryngeal closure (ILC) and laryngeal closure duration (LCD) in three groups of subjects: (1) ten stroke patients who aspirated before and during the swallow (aspirators), (2) ten stroke patients who did not aspirate (nonaspirators), and (3) ten normal control subjects. Means and standard deviations of ILC and LCD were analyzed for both 5-ml and 10-ml thin-liquid boluses using a 100-ms timer during subsequent analysis of videofluoroscopic swallowing examinations. There were significant differences between aspirators and control subjects for both ILC and LCD, and significant differences between aspirators and nonaspirators for ILC. There were no significant differences between aspirators and nonaspirators for LCD. Both delayed ILC and reduced LCD were associated with post-stroke aspiration. Delayed ILC is a significant indicator of overall risk of aspiration. Clinical implications for these findings are discussed.
Authors:
Taeok Park; Youngsun Kim; Do-Heung Ko; Gary McCullough
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Publication Detail:
Type:  Journal Article     Date:  2009-09-17
Journal Detail:
Title:  Dysphagia     Volume:  25     ISSN:  1432-0460     ISO Abbreviation:  Dysphagia     Publication Date:  2010 Sep 
Date Detail:
Created Date:  2010-08-30     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8610856     Medline TA:  Dysphagia     Country:  United States    
Other Details:
Languages:  eng     Pagination:  177-82     Citation Subset:  IM    
Affiliation:
School of Hearing, Speech and Language Sciences, Ohio University, Athens, OH, USA.
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