Assessment of Kinematic Brain Injury Metrics for Predicting Strain Responses in Diverse Automotive Impact Conditions
Assessment of Kinematic Brain Injury Metrics for Predicting Strain Responses in Diverse Automotive Impact Conditions
复制标题
DOI：
10.1007/s10439-016-1697-0
复制
发表时间：
2016-12-01
影响因子：
3.8
通讯作者：
Panzer, Matthew B.
中科院分区：
文献类型：
--
作者：
Gabler, Lee F.;Crandall, Jeff R.;Panzer, Matthew B.
许多损伤标准已经开发出来，可以使用头部在撞击过程中的运动学反应来预测脑损伤。每个标准使用一个度量，该度量是平移和/或旋转头部运动的速度和/或加速度分量的某种数学组合。早期的衡量标准是基于头部的线性加速度，但最近的损伤标准已经转向基于旋转的衡量标准。目前，没有一个普遍接受的衡量标准适用于不同范围的头部撞击。在这项研究中，我们评估了现有的15个基于运动学的指标在四种不同的汽车碰撞条件下预测基于应变的大脑反应的能力。通过对660个头部碰撞的有限元模型模拟，得到了组织水平的应变，包括乘员和行人的碰撞试验，以及摆式头部碰撞。评估了头部运动学指标和预测的基于大脑应变的指标之间的相关性。在被评估的指标中，脑应变与基于角速度的指标的相关性最高，而基于线加速度的指标的相关性最小。BRIC和RVCI是总体相关性最高的运动学指标；然而，在某些影响条件下，每个指标都有局限性。这项研究的结果表明，旋转头部运动学是脑损伤标准中最重要的参数。
Numerous injury criteria have been developed to predict brain injury using the kinematic response of the head during impact. Each criterion utilizes a metric that is some mathematical combination of the velocity and/or acceleration components of translational and/or rotational head motion. Early metrics were based on linear acceleration of the head, but recent injury criteria have shifted towards rotational-based metrics. Currently, there is no universally accepted metric that is suitable for a diverse range of head impacts. In this study, we assessed the capability of fifteen existing kinematic-based metrics for predicting strain-based brain response using four different automotive impact conditions. Tissue-level strains were obtained through finite element model simulation of 660 head impacts including occupant and pedestrian crash tests, and pendulum head impacts. Correlations between head kinematic metrics and predicted brain strain-based metrics were evaluated. Correlations between brain strain and metrics based on angular velocity were highest among those evaluated, while metrics based on linear acceleration were least correlative. BrIC and RVCI were the kinematic metrics with the highest overall correlation; however, each metric had limitations in certain impact conditions. The results of this study suggest that rotational head kinematics are the most important parameters for brain injury criteria.