Impact Performance Comparison of Advanced Snow Sport Helmets with Dedicated Rotation-Damping Systems.

Content Provider	Europe PMC
Author	DiGiacomo, Gina Tsai, Stanley Bottlang, Michael
Abstract	Rotational acceleration of the head is a principal cause of concussion and traumatic brain injury. Several rotation-damping systems for helmets have been introduced to better protect the brain from rotational forces. But these systems have not been evaluated in snow sport helmets. This study investigated two snow sport helmets with different rotation-damping systems, termed MIPS and WaveCel, in comparison to a standard snow sport helmet without a rotation-damping system. Impact performance was evaluated by vertical drops of a helmeted Hybrid III head and neck onto an oblique anvil. Six impact conditions were tested, comprising two impact speeds of 4.8 and 6.2 m/s, and three impact locations. Helmet performance was quantified in terms of the linear and rotational kinematics, and the predicted probability of concussion. Both rotation-damping systems significantly reduced rotational acceleration under all six impact conditions compared to the standard helmet, but their effect on linear acceleration was less consistent. The highest probability of concussion for the standard helmet was 89%, while helmets with MIPS and WaveCel systems exhibited a maximal probability of concussion of 67 and 7%, respectively. In conclusion, rotation-damping systems of advanced snow sport helmets can significantly reduce rotational head acceleration and the associated concussion risk.
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ISSN	00906964
Journal	Annals of Biomedical Engineering [Ann Biomed Eng]
Volume Number	49
DOI	10.1007/s10439-021-02723-0
PubMed Central reference number	PMC8510952
Issue Number	10
PubMed reference number	33528683
e-ISSN	15739686
Language	English
Publisher	Springer International Publishing
Publisher Date	2021-02-02
Publisher Place	Gewerbestrasse 11, Cham, Ch 6330, Switzerland
Access Restriction	Open
Rights License	Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. © The Author(s) 2021
Subject Keyword	Snow sport helmet Rotation-damping system Brain injury Concussion Oblique impact Impact testing Rotational acceleration Slip liner Ski Snowboard
Content Type	Text
Resource Type	Article
Subject	Biomedical Engineering