Mechanical properties of the human gastrointestinal tract

The tensile properties of the human esophagus, stomach, small and large bowel were examined on an Instron 1221 tensiometer. The values of maximal stress and destructive strain were the following: for esophagus—1.2 MPa and 140%, respectively, for stomach axial specimens—0.7 MPa and 190%, for stomach...

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Bibliographic Details
Published in:Journal of biomechanics 2002-10, Vol.35 (10), p.1417-1425
Main Authors: Egorov, Viacheslav I., Schastlivtsev, Ilia V., Prut, Edward V., Baranov, Andrey O., Turusov, Robert A.
Format: Article
Language:English
Subjects:
Biomechanical Phenomena
Bowel wall layers
Cadaver
Digestive System Physiological Phenomena
Digestive System Surgical Procedures
Elasticity
Esophagus - cytology
Esophagus - physiology
Esophagus - surgery
Gastrointestinal tract
Humans
In Vitro Techniques
Intestinal Mucosa - cytology
Intestinal Mucosa - physiology
Intestinal Mucosa - surgery
Intestine, Large - cytology
Intestine, Large - physiology
Intestine, Large - surgery
Intestine, Small - cytology
Intestine, Small - physiology
Intestine, Small - surgery
Intestines - cytology
Intestines - physiology
Intestines - surgery
Mechanical properties
Middle Aged
Sensitivity and Specificity
Stomach - cytology
Stomach - physiology
Stomach - surgery
Strain
Stress
Stress, Mechanical
Tensile Strength
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Summary:The tensile properties of the human esophagus, stomach, small and large bowel were examined on an Instron 1221 tensiometer. The values of maximal stress and destructive strain were the following: for esophagus—1.2 MPa and 140%, respectively, for stomach axial specimens—0.7 MPa and 190%, for stomach transversal specimens—0.5 MPa and 190%, for small bowel transversal specimens—0.9 MPa and 140% and for large bowel transversal specimens—0.9 MPa and 180%. Tests conducted on small and large bowel axial specimens permitted examination of the intestinal wall as a multi-layered structure. The mechanical properties of tested bowels in axial and transversal directions were qualitatively different. The submucosa and muscular layers condition the mechanical strength of bowel wall, while the serosa and mucosa showed no significant strength. Reproducible results were generated for cadaveric and surgically removed stomach and small intestine, which showed their mechanical properties similar under certain storage conditions. The data received could be used for monitoring of the mechanical properties of bowel wall layers under different conditions and for checking of bowel distension sequences.
ISSN:0021-9290
1873-2380
DOI:10.1016/S0021-9290(02)00084-2