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A cellulosic fibre foam as a bicycle helmet impact liner for brain injury mitigation in oblique impacts.
Heliyon
January 2025
Chalmers University of Technology, Department of Chemistry and Chemical Engineering, Kemivägen 10, 41296 Gothenburg.
Bulky cellulosic network structures (BRC) with densities between 60 and 130 g/l were investigated as a sustainable alternative to fossil-based foams for impact liners in bicycle helmets. The mechanical properties of BRC foams were characterized across a wide range of strain rates and incorporated into a validated finite element model of a hardshell helmet. Virtual impact tests simulating both consumer information and certification scenarios were conducted to compare BRC-lined helmets against conventional expanded polystyrene (EPS) designs.
View Article and Find Full Text PDFCharacteristics of e-scooter and bicycle injuries at a university hospital in a large German city - a one-year analysis.
Inj Epidemiol
January 2025
Department of Trauma Surgery, TUM University Hospital Klinikum Rechts der Isar, Ismaninger Straße 22, 81675, Munich, Germany.
Background: The increasing adoption of individual urban mobility in European cities is contributing to a rise in the number of bicycle and e-scooter users. Consequently, a corresponding increase in accidents, along with an additional burden on emergency departments, is anticipated, particularly in metropolitan areas. The objective of this prospective cross-sectional study was to gather detailed information regarding the patient demographics, accident mechanisms, and injury patterns of e-scooter riders in comparison to cyclists.
View Article and Find Full Text PDFBackground: Some individual-level interventions for dementia risk factors could be cost saving. We aimed to estimate the cost effectiveness of population-level interventions for tackling dementia risk factors. We found such interventions for tobacco smoking, excess alcohol use, diet modification to decrease hypertension and obesity, air pollution, and head injury.
View Article and Find Full Text PDFPopular but precarious: low helmet use among shared micromobility program riders in San Francisco.
Front Public Health
January 2025
Department of Surgery, University of California, San Francisco, San Francisco, CA, United States.
Background: Shared micromobility programs (SMPs) are integral to urban transport in US cities, providing sustainable transit options. Increased use has raised safety concerns, notably about helmet usage among e-scooter and e-bicycle riders. Prior studies have shown that head and upper extremity injuries have risen with SMP adoption, yet data on helmet use remains sparse.
View Article and Find Full Text PDFEstimating lives saved and serious injuries reduced by bicycle helmet use in Colorado, 2006-2014.
Int J Inj Contr Saf Promot
December 2024
Department of Civil Engineering, University of Colorado Denver, Denver, CO, USA.
Using the methodology developed by the National Highway Traffic Safety Administration (NHTSA) for motorcyclists, this paper estimates bicycle helmet effectiveness factors (HEFs), defined as the percentage greater chance that a helmeted bicyclist will avoid a fatality or serious injury relative to a non-wearer. We analyse reported motor vehicle-bicycle collisions in Colorado between 2006 and 2014. We conclude that NHTSA's motorcycle HEF methodology did not provide reasonable results given underreporting of low-severity collisions of helmeted bicyclists.
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