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Development, Validation and Pilot Field Deployment of a Custom Mouthpiece for Head Impact Measurement

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Abstract

The objective of this study was to develop a mouthpiece sensor with improved head kinematic measurement for use in non-helmeted and helmeted sports through laboratory validation and pilot field deployment in female youth soccer. For laboratory validation, data from the mouthpiece sensor was compared to standard sensors mounted in a headform at the center of gravity as the headform was struck with a swinging pendulum. Linear regression between peak kinematics measured from the mouthpiece and headform showed strong correlation, with r2 values of 0.95 (slope = 1.02) for linear acceleration, 1.00 (slope = 1.00) for angular velocity, and 0.97 (slope = 0.96) for angular acceleration. In field deployment, mouthpiece data were collected from four female youth soccer players and time-synchronized with film. Film-verified events (n = 915) were observed over 9 practices and 5 games, and 632 were matched to a corresponding mouthpiece event. This resulted in an overall sensitivity of 69.2% and a positive predictive value of 80.3%. This validation and pilot field deployment data demonstrates that the mouthpiece provides highly accurate measurement of on-field head impact data that can be used to further study the effects of impact exposure in both helmeted and non-helmeted sports.

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Acknowledgments

The authors thank the Virginia Tech Helmet Lab for their assistance in conducting the laboratory validation tests. They would also like to thank Konstantia Strates for her efforts in study coordination. Special thanks to the Childress Institute for Pediatric Trauma at Wake Forest Baptist Medical Center for providing support for this study. The National Institute of Neurological Disorders and Stroke of the National Institutes of Health, through Award Numbers R01NS091602-01A1, R01NS082453 and R01NS094410, supported members of the research team who contributed to this study. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health. The mouthpiece technology presented herein is patent pending.

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Correspondence to Joel D. Stitzel.

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Associate Editor Stefan M. Duma oversaw the review of this article.

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Rich, A.M., Filben, T.M., Miller, L.E. et al. Development, Validation and Pilot Field Deployment of a Custom Mouthpiece for Head Impact Measurement. Ann Biomed Eng 47, 2109–2121 (2019). https://doi.org/10.1007/s10439-019-02313-1

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