NDLI: Strain Distribution in the Layered Wall of the Esophagus

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Gregersen, H. Lee, T. C. Chien, S. Skalak, R. Fung, Y. C.
Copyright Year	1999
Abstract	The function of the esophagus is to move food by peristaltic motion, which is the result of the interaction of the tissue forces in the esophageal wall and the hydrodynamic forces in the food bolus. To understand the tissue forces in the esophagus, it is necessary to know the zero-stress state of the esophagus, and the stress–strain relationships of the tissues. This article is addressed to the first topic: the representation of zero-stress state of the esophagus by the states of zero stress-resultant and zero bending moment of the mucosa–submucosa and the muscle layers. It is shown that at the states of zero stress-resultant and zero bending moment, these two layers are not tubes of smaller radii but are open sectors whose shapes are approximately cylindrical and more or less circular. When the sectors are approximated by circular sectors, we measured their radii, opening angles, and average thickness around the circumference. Data on the radii, thickness-to-radius ratios, and the opening angles of these sectors are presented. Knowing the zero-stress state of these two layers, we can compute the strain distribution in the wall at any in vivo state, as well as the residual strain in the esophageal wall at the no-load state. The results of the in vivo states are compared to those obtained by a conventional approach, which treats the esophageal wall as a homogeneous material, and to another popular simplification, which ignores the residual strains completely. It is shown that the errors caused by the homogeneous wall assumption are relatively minor, but those caused by ignoring the residual strains completely are severe.
Starting Page	442
Ending Page	448
Page Count	7
File Format	PDF
ISSN	01480731
e-ISSN	15288951
Journal	Journal of Biomechanical Engineering
Volume Number	121
Issue Number	5
DOI	10.1115/1.2835072
Language	English
Publisher	The American Society of Mechanical Engineers
Publisher Date	1999-10-01
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Biological tissues Errors Fluid-dynamic forces Food products Force Motion Muscle Shapes Stress Stress-strain relations Thickness
Content Type	Text
Resource Type	Article
Subject	Physiology (medical) Biomedical Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Stress and Strain Distribution in Hypertensive and Normotensive Rat Aorta Considering Residual Strain

Determination of Homeostatic Elastic Moduli in Two Layers of the Esophagus

3D Mechanical Properties of the Layered Esophagus: Experiment and Constitutive Model

Bending of Blood Vessel Wall: Stress-Strain Laws of the Intima-Media and Adventitial Layers

Three-Dimensional Geometrical Characterization of Abdominal Aortic Aneurysms: Image-Based Wall Thickness Distribution

Three-Dimensional Stress Distribution in Arteries

Statistical Hemodynamics: A Tool for Evaluating the Effect of Fluid Dynamic Forces on Vascular Biology In Vivo

Strip Extensiometry for Comparison of the Mechanical Response of Bovine, Rabbit, and Human Corneas

A Biphasic, Anisotropic Model of the Aortic Wall

Strain Distribution in the Layered Wall of the Esophagus

Similar Documents

Stress and Strain Distribution in Hypertensive and Normotensive Rat Aorta Considering Residual Strain

Determination of Homeostatic Elastic Moduli in Two Layers of the Esophagus

3D Mechanical Properties of the Layered Esophagus: Experiment and Constitutive Model

Bending of Blood Vessel Wall: Stress-Strain Laws of the Intima-Media and Adventitial Layers

Three-Dimensional Geometrical Characterization of Abdominal Aortic Aneurysms: Image-Based Wall Thickness Distribution

Three-Dimensional Stress Distribution in Arteries

Statistical Hemodynamics: A Tool for Evaluating the Effect of Fluid Dynamic Forces on Vascular Biology In Vivo

Strip Extensiometry for Comparison of the Mechanical Response of Bovine, Rabbit, and Human Corneas

A Biphasic, Anisotropic Model of the Aortic Wall

Strain Distribution in the Layered Wall of the Esophagus