Characterization of the passive mechanical properties of large intestine

Issue title: Proceedings of the twelfth International Symposium on Interdisciplinary Electromagnetic, Mechanic and Biomedical Problems, ISEM Bad Gastein

Article type: Research Article

Authors: Higa, Masaru^{a; *} | Luo, Yun^a | Okuyama, Takeshi^b | Takagi, Toshiyuki^b

Affiliations: [a] Biomedical Engineering Research Organization, Tohoku University, Seiryo 2-1 Aoba-ku, Sendai, 980-8575, Japan | [b] Institute of Fluid Science, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai, 980-8577, Japan

Correspondence: [*] Corresponding author. Tel.: +81 22 717 7585; Fax: +81 22 717 7585; E-mail: masaru@tubero.tohoku.ac.jp

Abstract: This paper presents experimental data obtained from the in vivo compression of the large intestine of goat and describes its non-linear and viscoelastic mechanical properties. Data were obtained from compression tests on the large intestine of an anesthetized goat using a stress-strain acquisition equipment. The tissue was first compressed with a constant rate then hold at a maximum strain for 300 seconds. All the results demonstrated highly non-linear stress-strain behavior during the compression phase. The stress versus time curve during the relaxation phase was obtained and the reduced-stress relaxation function was applied. This paper serves as a preliminary report on the mechanical properties of large intestine based on in vivo experimental data.

Keywords: Large intestine, viscoelasticity, non-linearity, in vivo compression

DOI: 10.3233/JAE-2007-756

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 25, no. 1-4, pp. 595-599, 2007