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Influence of preservation temperature on the measured mechanical properties of brain tissue
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File | Description | Size | Format | |
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BM-D-12-00689R1.pdf | 862.53 KB |
Date Issued
April 2013
Date Available
29T12:11:18Z September 2014
Abstract
The large variability in experimentally measured mechanical properties of brain tissue is due to many factors including heterogeneity, anisotropy, age dependence and post-mortem time. Moreover, differences in test protocols also influence these measured properties. This paper shows that the temperature at which porcine brain tissue is stored or preserved prior to testing has a significant effect on the mechanical properties of brain tissue, even when tests are conducted at the same temperatures. Three groups of brain tissue were stored separately for at least 1 h at three different preservation temperatures, i.e., ice cold, room temperature (22 °C) and body temperature (37 °C), prior to them all being tested at room temperature (∼22 °C). Significant differences in the corresponding initial elastic shear modulus μ (Pa) (at various amounts of shear, 0≤K≤1.0) were observed. The initial elastic moduli were 1043±271 Pa, 714±210 Pa and 497±156 Pa (mean±SD) at preservation temperatures of ice cold, 22 °C and 37 °C, respectively. Based on this investigation, it is strongly recommended that brain tissue samples must be preserved at an ice-cold temperature prior to testing in order to minimize the difference between the measured in vitro test results and the in vivo properties. A by-product of the study is that simple shear tests allow for large, almost perfectly homogeneous deformation of brain matter.
Type of Material
Journal Article
Publisher
Elsevier
Journal
Journal of Biomechanics
Volume
46
Issue
7
Start Page
1276
End Page
1281
Copyright (Published Version)
2013 Elsevier
Language
English
Status of Item
Peer reviewed
This item is made available under a Creative Commons License
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