Department of Bioengineering, University of Louisville, Louisville, KY, USA.
Engineering Fundamentals Department, University of Louisville, Louisville, KY, USA.
Sci Rep. 2022 May 21;12(1):8617. doi: 10.1038/s41598-022-12489-7.
The objective of this study was to characterize head biomechanics of video-recorded falls involving young children in a licensed childcare setting. Children 12 to < 36 months of age were observed using video monitoring during daily activities in a childcare setting (in classrooms and outdoor playground) to capture fall events. Sensors (SIM G) incorporated into headbands worn by the children were used to obtain head accelerations and velocities during falls. The SIM G device was activated when linear acceleration was ≥ 12 g. 174 video-recorded falls activated the SIM G device; these falls involved 31 children (mean age = 21.6 months ± 5.6 SD). Fall heights ranged from 0.1 to 1.2 m. Across falls, max linear head acceleration was 50.2 g, max rotational head acceleration was 5388 rad/s, max linear head velocity was 3.8 m/s and max rotational head velocity was 21.6 rad/s. Falls with head impact had significantly higher biomechanical measures. There was no correlation between head acceleration and fall height. No serious injuries resulted from falls-only 1 child had a minor injury. In conclusion, wearable sensors enabled characterization of head biomechanics during video-recorded falls involving young children in a childcare setting. Falls in this setting did not result in serious injury.
本研究旨在描述许可日托环境中幼儿录像坠落的头部生物力学特征。在日托环境（教室和户外操场）中进行日常活动时，使用视频监控观察 12 至 <36 个月大的儿童，以捕捉坠落事件。佩戴在儿童头上的头带中集成的传感器（SIM G）用于在坠落期间获得头部加速度和速度。当线性加速度≥12g 时，SIM G 设备被激活。174 个录像坠落激活了 SIM G 设备；这些坠落涉及 31 名儿童（平均年龄=21.6 个月±5.6 SD）。坠落高度从 0.1 米到 1.2 米不等。在所有坠落中，最大线性头部加速度为 50.2g，最大旋转头部加速度为 5388rad/s，最大线性头部速度为 3.8m/s，最大旋转头部速度为 21.6rad/s。有头部撞击的坠落具有明显更高的生物力学指标。头部加速度与坠落高度之间没有相关性。坠落没有导致严重伤害——只有 1 名儿童受轻伤。总之，可穿戴传感器能够描述许可日托环境中幼儿录像坠落的头部生物力学特征。在这种环境下的坠落没有导致严重伤害。
