| Finite element simulation of food transport through the esophageal body. | |
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MedLine Citation:
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PMID: 17457965 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The peristaltic transport of swallowed material in the esophagus is a neuro-muscular function involving the nerve control, bolus-structure interaction, and structure-mechanics relationship of the tissue. In this study, a finite element model (FEM) was developed to simulate food transport through the esophagus. The FEM consists of three components, i.e., tissue, food bolus and peristaltic wave, as well as the interactions between them. The transport process was simulated as three stages, i.e., the filling of fluid, contraction of circular muscle and traveling of peristaltic wave. It was found that the maximal passive intraluminal pressure due to bolus expansion was in the range of 0.8-10 kPa and it increased with bolus volume and fluid viscosity. It was found that the highest normal and shear stresses were at the inner surface of muscle layer. In addition, the peak pressure required for the fluid flow was predicted to be 1-15 kPa at the bolus tail. The diseases of systemic sclerosis or osteogenesis imperfecta, with the remodeled microstructures and mechanical properties, might induce the malfunction of esophageal transport. In conclusion, the current simulation was demonstrated to be able to capture the main characteristics in the intraluminal pressure and bolus geometry as measured experimentally. Therefore, the finite element model established in this study could be used to further explore the mechanism of esophageal transport in various clinical applications. |
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Authors:
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Wei Yang; Tat Ching Fung; Kerm Sim Chian; Chuh Khiun Chong |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't; Review |
Journal Detail:
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Title: World journal of gastroenterology : WJG Volume: 13 ISSN: 1007-9327 ISO Abbreviation: World J. Gastroenterol. Publication Date: 2007 Mar |
Date Detail:
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Created Date: 2007-04-25 Completed Date: 2007-05-31 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100883448 Medline TA: World J Gastroenterol Country: China |
Other Details:
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Languages: eng Pagination: 1352-9 Citation Subset: IM |
Affiliation:
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School of Civil and Environmental Engineering, Nanyang Technological University, Singapore. pg05544456@ntu.edu.sg |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Computer Simulation* Deglutition / physiology* Esophagus / physiology* Finite Element Analysis* Humans Mathematics Models, Biological Muscle Contraction / physiology Muscle, Smooth / physiology Peristalsis / physiology |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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