Passive mechanical properties of large intestine under in vivo and in vitro compression

Abstract This paper presents experimental data obtained from both in vivo and in vitro compression of the large intestine of goat. In vivo experimental data were obtained from compression tests on the large intestine of an anesthetized goat using force–displacement acquisition equipment. In vitro ex...

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Bibliographic Details
Published in:Medical engineering & physics 2007-10, Vol.29 (8), p.840-844
Main Authors: Higa, Masaru, Luo, Yun, Okuyama, Takeshi, Takagi, Toshiyuki, Shiraishi, Yasuyuki, Yambe, Tomoyuki
Format: Article
Language:English
Subjects:
Animals
Biomechanical Phenomena - methods
Compressive Strength
Computer Simulation
Elasticity
Female
Goats
In Vitro Techniques
In vivo test
Intestine, Large - physiology
Large intestine
Mechanical property
Models, Biological
Radiology
Soft tissues
Stress, Mechanical
Weight-Bearing - physiology
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Summary:Abstract This paper presents experimental data obtained from both in vivo and in vitro compression of the large intestine of goat. In vivo experimental data were obtained from compression tests on the large intestine of an anesthetized goat using force–displacement acquisition equipment. In vitro experimental data were also obtained from tissue excised after the in vivo experiments, and two types of data were then compared. The results demonstrated that the stress values had a strong dependence on the compressive rate in the in vivo experiments, although such effect was not distinct in the in vitro experiments. Additionally, at a lower compression rate, the intestinal tissues were found to be stiffer in the in vitro experiments than in the in vivo ones. This paper is a preliminary report on the mechanical properties of the large intestine based on in vivo and in vitro experimental data.
ISSN:1350-4533
1873-4030
DOI:10.1016/j.medengphy.2006.09.003