Document Detail

The contractile deceleration point: an important physiologic landmark on oesophageal pressure topography.
MedLine Citation:
PMID:  20047637     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: This study aimed to correlate oesophageal bolus transit with features of oesophageal pressure topography (OPT) plots and establish OPT metrics for accurately measuring peristaltic velocity.
METHODS: About 18 subjects underwent concurrent OPT and fluoroscopy studies. The deglutitive Contractile Front Velocity (CFV) in OPT plots was subdivided into an initial fast phase (CFV(fast)) and subsequent slow phase (CFV(slow)) separated by a user-defined deceleration point (CDP). Fluoroscopy studies were analyzed for the transition from the initial rapidly propagated luminal closure associated with peristalsis to slow bolus clearance characteristic of phrenic ampullary emptying and to identify the pressure sensors at the closure front and at the hiatus. Oesophageal pressure topography measures were correlated with fluoroscopic milestones of bolus transit. Oesophageal pressure topography studies from another 68 volunteers were utilized to develop normative ranges for CFV(fast) and CFV(slow).
KEY RESULTS: A distinct change in velocity could be determined in all 36 barium swallows with the fast and slow contractile segments having a median velocity of 4.2 cm s(-1) and 1.0 cm s(-1), respectively. The CDP noted on OPT correlated closely with formation of the phrenic ampulla making CFV(fast) (mean 5.1 cm s(-1)) correspond closely to peristaltic propagation and CFV(slow) (mean 1.7 cm s(-1)) to ampullary emptying.
CONCLUSIONS & INFERENCES: The deceleration point in the CFV on OPT plots accurately demarcated the early region in which the CFV reflects peristaltic velocity (CFV(fast)) from the later region where it reflects the progression of ampullary emptying (CFV(slow)). These distinctions should help objectify definitions of disordered peristalsis, especially spasm, and improve understanding of impaired bolus transit across the oesophagogastric junction.
J E Pandolfino; E Leslie; D Luger; B Mitchell; M A Kwiatek; P J Kahrilas
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural     Date:  2009-12-27
Journal Detail:
Title:  Neurogastroenterology and motility : the official journal of the European Gastrointestinal Motility Society     Volume:  22     ISSN:  1365-2982     ISO Abbreviation:  Neurogastroenterol. Motil.     Publication Date:  2010 Apr 
Date Detail:
Created Date:  2010-04-09     Completed Date:  2010-06-28     Revised Date:  2014-09-13    
Medline Journal Info:
Nlm Unique ID:  9432572     Medline TA:  Neurogastroenterol Motil     Country:  England    
Other Details:
Languages:  eng     Pagination:  395-400, e90     Citation Subset:  IM    
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MeSH Terms
Deglutition / physiology*
Esophagogastric Junction / physiology
Esophagoscopy / methods*
Esophagus / physiology
Fluoroscopy / methods*
Gastrointestinal Motility / physiology
Image Processing, Computer-Assisted
Manometry / methods*
Middle Aged
Peristalsis / physiology*
Transducers, Pressure
Grant Support

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

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