The protective effect of headband in indoor head traumatic accidents caused by fall

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  • Han Lu
    Department of Intelligent Mechanical Systems, Faculty of System Design, Tokyo Metropolitan University
  • Zhang Yuelin
    College of Science and Engineering, Aoyama Gakuin University
  • Nakadate Hiromichi
    Department of Intelligent Mechanical Systems, Faculty of System Design, Tokyo Metropolitan University
  • Aomura Shigeru
    Department of Intelligent Mechanical Systems, Faculty of System Design, Tokyo Metropolitan University
  • Matsui Yasuhiro
    Automotive Research Department, National Traffic Safety and Environment Laboratory, National Agency for Automobile and Land Transport Technology

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Other Title
  • 屋内転倒事故におけるヘッドバンドの頭部防護効果
  • オクナイ テントウ ジコ ニ オケル ヘッドバンド ノ トウブ ボウゴ コウカ

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Abstract

Head trauma accidents caused by falling indoors have been reported. The purpose of this study is to evaluate quantitatively the protective effect of a headband against head impact caused by falls by using computer simulation. Firstly, four types of movements of falls resulting from faint, slip, trip and step down were simulated by using a whole body numerical model and four regions of bruises on the frontal, parietal, temporal, and occipital region were chosen as the impact condition of the head. Secondly, the posture, translational and rotational velocity just before the collision of the head were input to a finite element human head model to simulate the collision motion of the head against the floor. A headband model made from EVA （ ethylene-vinyl acetate） foam is constructed, and two kinds of floor （ tile and wooden flooring ） are assumed and modeled. For each scenario of falls, head collisions with and without headband were simulated and the risk of fracture, cerebral contusion and concussion was calculated from the obtained mechanical responses during head collision. As a result, the use of the headband generally reduced the risk of head injury in indoor fall accidents, even though there are differences in protection effect depending on the postures of falling and the type of floor.

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