Girard Michael, Suh Jun-Kyo Francis, Hart Richard T, Burgoyne Claude F, Downs J Crawford
Department of Biomedical Engineering, Tulane University, New Orleans, Louisiana, USA.
Curr Eye Res. 2007 May;32(5):465-70. doi: 10.1080/02713680701273792.
In the field of biomechanics, little research has been performed to evaluate the effect of storage time on the material properties of ocular tissues. Twenty-four rabbit eyes were divided into six groups with storage times from 3 to 72 hr. A tensile specimen was prepared from the inferior quadrant of each sclera and was subjected to a stress relaxation test. The data were analyzed using linear viscoelastic theory yielding four material parameters (E(0), instantaneous elastic modulus; E(infinity), equilibrium elastic modulus; beta, half-width of the Gaussian distribution; tau(m); mean relaxation time). No statistically significant differences were found in the material properties of each group, which suggests that sclera can be stored up to 3 days without risking mechanical deterioration.
在生物力学领域，很少有研究评估储存时间对眼组织材料特性的影响。将24只兔眼分为6组，储存时间从3小时到72小时不等。从每个巩膜的下象限制备拉伸试样，并进行应力松弛试验。使用线性粘弹性理论分析数据，得出四个材料参数（E(0)，瞬时弹性模量；E(∞)，平衡弹性模量；β，高斯分布的半高宽；τ(m)，平均松弛时间）。每组的材料特性未发现统计学上的显著差异，这表明巩膜可以储存长达3天而不会有机械性能恶化的风险。
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