主动脉瓣、肺动脉瓣力学性能比较

Comparison of Mechanical Properties between Human Aortic Valve and Pulmonary Arterial Valve

本文用实验方法测定了中国人主动脉和肺动脉瓣的力学性能。它包括单轴拉伸时的应力－应变曲线，最大切线模量E（此曲线直线段的斜率），抗拉强度民，极限应变εb等参数。结果显示，力学性能在主动脉瓣与肺动脉忍之间有显著差异（显著性水平α＝0．01），而肺动脉瓣内沿周向和沿径向的差异却不十分明显，即各向异性程度不高。

We have investigated the mechanical properties of Chinese aortic and pulmonary valves by means ofuniaxial tension. The parameters include the stress-strain curve, the maximum tangent modulus E(the slope of lin-ear segment) in the curve, the tensile strength b, and the ultimate strain . The results have shown that E,and values between aortic valve and pulmonary valve exist significant differences (significant level = 0. 01 ), butthe mechanical property differences between circumferential direction and radial direction in the pulmonary arterialvalve are not significant, that means,the valve appears small anisotropic behaviour.