Evaluation of biaxial mechanical properties of soft tubes and arteries using sonometry.
Evaluation of biaxial mechanical properties of soft tubes and arteries using sonometry.
复制标题
使用声波测量法评估软管和动脉的双轴机械性能。
DOI：
10.1109/iembs.2009.5333579
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
Greenleaf,JamesF
中科院分区：
文献类型：
--
作者：
Bernal,Miguel;Urban,Matthew;Rosario,Daniel;Aquino,Wilkins;Greenleaf,JamesF
在过去的几十年里，动脉弹性已经成为一个重要的话题，因为它已经表明它可以用来预测心血管疾病和死亡率。已经开发了几种体内和体外技术来表征血管的机械特性。体内技术往往忽略血管壁成分的各向异性。而离体技术往往是破坏性的，不考虑动脉的几何形状。本文介绍了一种用声纳法研究猪颈动脉软管和切除后不同方向的弹性的方法。该方法利用压电晶体跟踪管道或容器受压时的周向和纵向应变。我们比较了在两种不同类型的管中进行的声压实验获得的杨氏模量，以及在制造这些管的材料中进行的机械测试。我们还提供了在切除的猪颈动脉中获得的数据，并显示了纵向和圆周方向的差异。我们提出的技术具有非破坏性研究软材料圆柱形的潜力，并可用于研究容器的机械性能。
Arterial elasticity has become a topic of importance in the past decades, as it has shown that it can be used to predict cardiovascular diseases and mortality. Several in vivo and ex vivo techniques have been developed to characterize the mechanical properties of vessels. In vivo techniques tend to ignore the anisotropicity of the vessel wall components. While ex vivo techniques tend to be destructive and do not to account for the geometry of the arteries. In this paper we present a technique using sonometry to study the elasticity of soft tubes and excised pig carotids in different directions. The method uses piezoelectric crystals to track the strain in the circumferential and longitudinal directions while the tubes or vessels are being pressurized. We compare the Young's moduli obtained from sonometry experiments performed in two different types of tubes with the mechanical testing done in the material used to make these tubes. We also present data obtained in the excised pig carotids and show the differences in the longitudinal versus the circumferential directions. The technique we propose has a potential for the non destructive study of soft material cylindrical shapes and can be use to study the mechanical properties of vessels.