Wegner W, Feder H
Res Exp Med (Berl). 1976 Aug 25;168(2):129-41. doi: 10.1007/BF01851903.
In a machine for tensile tests the ultimate strength, stress and strain of the aorta ascendens of 47 female pigs (German landrace) at three different regions of the vessel wall were determined. The animals were fattened under identical conditions in a progeny testing station and slaughtered at the same living weight (102 +/- 2 kg). Weak regressions of body weight and age on parameters measured were nevertheless accounted for. The average elastin content of the aorta ascendens diminished with advancing age but was not significantly correlated to biomechanical properties of the three single samples. Maximum load, stress and modulus of vessel wall segment I (stamped out nearer to the heart) was greater than in sample II. These circumferential segments however exhibited highly stronger biomechanical resistance than sample III, which was stamped longitudinally. In samples I and II there was a negative correlation between thickness of the wall and ultimate tensile stress (N/mm2). Freezing of the material prior to test at -18degrees C for one week resulted in a significant rise in ultimate tensile strength and stress. The meaning of these findings for comparative angiology is discussed.
在一台拉伸试验机上，测定了47头雌性德国长白猪升主动脉在血管壁三个不同区域的极限强度、应力和应变。这些动物在后代测试站相同条件下育肥，并在相同活重（102±2千克）时屠宰。不过，已考虑了体重和年龄对所测参数的微弱回归影响。升主动脉的平均弹性蛋白含量随年龄增长而降低，但与三个单个样本的生物力学特性无显著相关性。血管壁节段I（冲压位置更靠近心脏）的最大负荷、应力和模量大于样本II。然而，这些圆周节段的生物力学抗性比纵向冲压的样本III强得多。在样本I和II中，壁厚与极限拉伸应力（N/mm²）之间呈负相关。在测试前将材料在-18℃下冷冻一周，导致极限拉伸强度和应力显著提高。讨论了这些发现对比较血管学的意义。
