Institute of Biomedical Technologies, Auckland University of Technology, Private Bag 92006, Auckland, New Zealand.
Med Eng Phys. 2011 Dec;33(10):1287-92. doi: 10.1016/j.medengphy.2011.06.006. Epub 2011 Jul 12.
This paper presents a 3D finite element upper arm model, validated by experiments as well as clinical data, used to study the error introduced in blood pressure measurements due to variability of arm tissue mechanical properties. The model consists of three separate cylindrical parts: soft tissue, bone and brachial artery. The artery volume changes under the cuff are used to represent the cuff pressure oscillations for analyzing blood pressure measurements. These oscillation trends are identical to observed clinical data. Also an upper arm simulator is designed and built for model validation. The model shows that the variation of soft tissue compressibility introduces an error up to 5% in blood pressure measurements. It is also revealed that the variation of the brachial artery and arm tissue stiffness has an insignificant effect on oscillometric blood pressure measurement method.
本文提出了一个经过实验和临床数据验证的 3D 有限元上臂模型，用于研究由于手臂组织力学特性变化导致血压测量误差。该模型由三个独立的圆柱形部分组成：软组织、骨骼和肱动脉。袖带下动脉体积的变化用于代表袖带压力的波动，以分析血压测量值。这些波动趋势与观察到的临床数据一致。还设计并构建了一个上臂模拟器来进行模型验证。模型表明，软组织可压缩性的变化会导致血压测量值出现高达 5%的误差。研究还揭示，肱动脉和手臂组织刚度的变化对示波法血压测量方法的影响可以忽略不计。
