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Three-dimensional finite element model of the two-layered oesophagus, including the effects of residual strains and buckling of mucosa.
- Source :
- Proceedings of the Institution of Mechanical Engineers -- Part H -- Journal of Engineering in Medicine (Professional Engineering Publishing); May2007, Vol. 221 Issue 4, p417-426, 10p, 10 Diagrams, 1 Chart, 7 Graphs
- Publication Year :
- 2007
-
Abstract
- This study was carried out to develop a two-layered finite element model of the oesophagus. The outer muscle and inner mucosal layer were constructed individually with different mechanical properties and zero-stress opening angles. With the model, two simulations were performed. First, the distention of oesophageal wall under the pressurized state was investigated, from which the effects of residual strains on the stress distribution were evaluated. Second, the buckling modes were determined using a linear eigenvalue analysis. The self-contact capability in ABAQUS was applied to simulate the folding of mucosa under the muscle contraction. The first simulation indicated that, by taking the residual strains into account, the mucosa undertook a very small portion of stress and the luminal pressure almost transmitted completely to the outer muscle layer. On the other hand, the folding of mucosa was shown to be able to reduce the contractile force of circular muscle to maintain the lumen closure. In conclusion, the preliminary study demonstrated the feasibility of simulating the oesophageal peristaltic transport using finite element analysis. [ABSTRACT FROM AUTHOR]
- Subjects :
- ESOPHAGUS
MUSCLE contraction
FINITE element method
MODULAR arithmetic
SIMULATION methods & models
ESOPHAGEAL physiology
INTESTINAL mucosa physiology
ANIMAL experimentation
BIOLOGICAL models
COMPARATIVE studies
COMPUTER simulation
ELASTICITY
RESEARCH methodology
MEDICAL cooperation
RESEARCH
THREE-dimensional imaging
EVALUATION research
PHYSIOLOGIC strain
Subjects
Details
- Language :
- English
- ISSN :
- 09544119
- Volume :
- 221
- Issue :
- 4
- Database :
- Supplemental Index
- Journal :
- Proceedings of the Institution of Mechanical Engineers -- Part H -- Journal of Engineering in Medicine (Professional Engineering Publishing)
- Publication Type :
- Academic Journal
- Accession number :
- 25353326
- Full Text :
- https://doi.org/10.1243/09544119JEIM47