Vehicle Safety & Biomechanics Laboratory, Toyota Central R&D Labs., Inc., 41-1 Yokomichi, Nagakute, Aichi, 480-1192, Japan.
Ann Biomed Eng. 2012 Jan;40(1):114-26. doi: 10.1007/s10439-011-0414-2. Epub 2011 Oct 13.
Although Head Injury Criterion (HIC) is an effective criterion for head injuries caused by linear acceleration such as skull fractures, no criteria for head injuries caused by rotational kinematics has been accepted as effective so far. This study proposed two criteria based on angular accelerations for Traumatic Brain Injury (TBI), which we call Rotational Injury Criterion (RIC) and Power Rotational Head Injury Criterion (PRHIC). Concussive and non-concussive head acceleration data obtained from football head impacts were utilized to develop new injury criteria. A well-validated human brain Finite Element (FE) model was employed to find out effective injury criteria for TBI. Correlation analyses were performed between the proposed criteria and FE-based brain injury predictors such as Cumulative Strain Damage Measure (CSDM), which is defined as the percent volume of the brain that exceeds a specified first principal strain threshold, proposed to predict Diffuse Axonal Injury (DAI) which is one of TBI. The RIC was significantly correlated with the CSDMs with the strain thresholds of less than 15% (R > 0.89), which might predict mild TBI. In addition, PRHIC was also strongly correlated with the CSDMs with the strain thresholds equal to or greater than 20% (R > 0.90), which might predict more severe TBI.
尽管头部冲击损伤准则（HIC）是一种有效的线性加速度（如颅骨骨折）引起的头部损伤的准则，但迄今为止，还没有被认可的用于旋转运动学引起的头部损伤的有效准则。本研究提出了两种基于角加速度的创伤性脑损伤（TBI）的准则，我们称之为旋转损伤准则（RIC）和功率旋转头部损伤准则（PRHIC）。利用从足球头部撞击中获得的震荡性和非震荡性头部加速度数据来开发新的损伤准则。采用了经过良好验证的人类大脑有限元（FE）模型，以找到用于 TBI 的有效损伤准则。对所提出的准则与基于 FE 的脑损伤预测因子（如累积应变损伤度量（CSDM））之间进行了相关性分析，CSDM 定义为超过指定的第一主应变阈值的大脑体积百分比，用于预测创伤性脑损伤（TBI）之一的弥漫性轴索损伤（DAI）。RIC 与应变阈值小于 15%的 CSDMs 显著相关（R > 0.89），这可能预测轻度 TBI。此外，PRHIC 与应变阈值等于或大于 20%的 CSDMs 也具有很强的相关性（R > 0.90），这可能预测更严重的 TBI。
