Child Helmet Research Articles

Evaluating child helmet protection and testing standards: A study using PIPER child head models aged 1.5, 3, 6, and 18 years.

The anatomy of children's heads is unique and distinct from adults, with smaller and softer skulls and unfused fontanels and sutures. Despite this, most current helmet testing standards for children use the same peak linear acceleration threshold as for adults. It is unclear whether this is reasonable and otherwise what thresholds should be. To answer these questions, helmet-protected head responses for different ages are needed which is however lacking today. In this study, we apply continuously scalable PIPER child head models of 1.5, 3, and 6 years old (YO), and an upgraded 18YO to study child helmet protection under extensive linear and oblique impacts. The results of this study reveal an age-dependence trend in both global kinematics and tissue response, with younger children experiencing higher levels of acceleration and velocity, as well as increased skull stress and brain strain. These findings indicate the need for better protection for younger children, suggesting that youth helmets should have a lower linear kinematic threshold, with a preliminary value of 150g for 1.5-year-old helmets. However, the results also show a different trend in rotational kinematics, indicating that the threshold of rotational velocity for a 1.5YO is similar to that for adults. The results also support the current use of small-sized adult headforms for testing child helmets before new child headforms are available.

Assessment of child safety on bicycles in baby carriers – The importance of evaluating both head and neck injuries

Introduction: The paper addresses an important accident type that involves children in bicycle seats – the bicycle fall over. It is a significant and common accident type and many parents have been reported to experience this type of “close call.” The fall over occurs at low velocities and even while a bicycle is standing still, and may result from a split-second lack of attention on behalf of the accompanying adult (e.g. while loading groceries, i.e. while not being exposed to traffic per se). Moreover, irrespective of the low velocities involved, the trauma that may result to the head of the child is considerable and may be life-threatening, as shown in the study. Method: The paper presents two methods to address this accident scenario in a quantitative way: in-situ accelerometer-based measurement and numerical modeling approaches. It is shown that the methods produce consistent results under the prerequisites of the study. They are therefore promising methods to be used in the study of this type of accident. Results: The importanance of the protective role of a child helmet is without discussion in everyday traffic.However, this study draws attention to one particular effect observed in this accident type: that the geometry of the helmet may at times expose the child's head to considerably larger forces, by having contact with the ground. The study also highlights the importance of neck bending injuries during bicycle fall over, which are often neglected in the safety assessment – not only for children in bicycle seats. The study concludes that considering only head acceleration may lead to biased conclusions about using helmets as protective devices.

Parental beliefs regarding adult and child motorcycle helmet-wearing practices in Vietnam.

From a global perspective, low helmet-wearing rates in children are an ongoing concern. International studies show adult helmet-wearing rates are consistently higher than those of children. Research also shows parents are highly influential in promoting healthy behavior in their children. Parent-focused helmet-wearing campaigns are a practical way to actively feature parents influencing helmet-wearing in children. The current study obtained anonymous parent-focused survey data on parent and child helmet-wearing practices, perceived affects of helmet use on children's health, and beliefs about brain injury prevention from a sample of Vietnams parents. Findings from this study are consistent with previous international research that shows adults wear helmets at higher rates than children. Data from this study may help those responsible for child helmet safety campaigns develop more effective child helmet-wearing campaigns, particularly in Southeast Asian countries.

Investigation of the Effect of Child Helmet Design Parameters on Head and Brain Injuries Using Reduced-Order Modelling

A helmet is the main protective equipment for a child pillion passenger. A safe helmet must be able to mitigate head and brain injuries resulting from high head impact loading. A lightweight helmet is preferable, especially for children. This paper proposed to study the effect of materials, liner thickness, and friction at the head–helmet interface on linear and rotational accelerations using reduced-order modelling. A child head–helmet finite element model was developed and validated against an experiment. Finite element simulations were conducted to generate training data for the establishment of reduced-order models which were subsequently used to predict the linear and rotational accelerations for various helmet parameters. The prediction could be performed in a very short time compared to its corresponding finite element simulation. The use of aluminium foam enhanced mitigation of the linear and rotational accelerations as well as weight reduction. This study also revealed that the head–helmet friction coefficient had a strong effect on the rotational acceleration, while the liner thickness predominantly affected the linear acceleration. However, the liner thickness had less influence on the rotational acceleration when the head–helmet friction was low. The risk of brain concussion as well as diffusional injury could be reduced by enabling low friction at head–helmet surface.

Factors affecting road safety compliance in a low- and middle-income country: An observational study from Lebanon.

Road traffic injury is a major public health problem in Lebanon. This study aims to assess compliance with safety measures including seatbelt and helmet use in adults and children, and the prevalence of distracted driving among road users across Lebanon different governorates. It further aims to investigate predictors of compliance with seatbelt and helmet use. A cross-sectional observational field study was conducted at multiple governorates in Lebanon. Data collected included information on vehicles, road users and passengers. Univariate and multivariable logistic regression analyses were performed to identify trends in compliance with safety measures and distracted driving, and predictors of compliance. A total of 13,790 road users were observed. The rate of seatbelt and helmet use were 37.4% and 38.9%, respectively, among adults. Distracted behavior was present in 23.7% of car drivers and 22.8% of motorcyles adult riders. Compliance with seatbelt use was lower outside the capital city Beirut [OR = 5.236 (4.566-6.004), P <0.001], in males [OR = 1.688 (1.52-1.874), P <0.001], in drivers of taxi/vans [OR = 1.929 (1.71-2.175), P <0.001] or trucks [OR = 3.014 (2.434-3.732), P <0.001], and vehicles of lower price [OR = 3.291 (2.836-3.819), P <0.001]. Children vehicle passengers were 87.9% while motorcycles pillion riders were 12.1%. The rates for child car restraint and helmet use were 25.8% and 20.1%, respectively. Predictors of failure to use a child restraint system in vehicles were the youngest age group (0-5 years) [OR = 2.06, CI (1.40-3.02), P<0.001], sitting in the back seat [OR = 1.56, CI (1.09-2.23), P<0.001], ridding in the afternoon [OR = 1.43, CI (1.05-1.94), P = 0.02], and being outside Beirut [OR = 2.12, CI (1.41-3.17), P<0.00]. Public awareness efforts and better enforcement of road safety legislations are needed to increase the alarmingly low rates of compliance with safety measures and safeguard lives on the road.

Construction of risk in road safety advertising: a multimodal analysis of Vietnamese child helmet awareness advertisements

Abstract The discourses of risk serve to organise the ways in which we understand and respond to potential harms and threats, which have become a major concern in our daily life. However, the discourses of risk have not been extensively investigated using linguistic text-based methods on the multimodal level, nor deeply examined beyond Western contexts. Grounded in the literature of risk and multimodal discourse, the aim of the study is to demonstrate Multimodal Discourse Analysis from a Systemic Functional Linguistics perspective as a potential methodology to investigate how risk discourses are constructed in and through semiotic resources in a non-Western setting. Through a case study of child helmet awareness advertisements in Vietnam, the multimodal analysis reveals a comprehensive picture of risk discourses constructed across various semiotic modes. In this analysis, the discourses of risk are constructed through a negotiation of expert knowledge and traditional values to encourage the audience to take actions and provide helmets for their children. Findings of the study demonstrate the use of Systemic Functional multimodal approach to media and communication to provide evidence for risk discourses in the Vietnamese setting, which are at odds with the current literature and can potentially be extended to other contexts.

Social and environmental risk factors for road traffic injuries among children under five in rural China.

Background:Road traffic injuries (RTIs) have become a considerable issue for children. In China, RTIs are among the top 3 contributors to injury-related mortality and disability-adjusted life years. The present study aimed to evaluate social and environmental factors that may contribute to RTIs among children under 5 in rural areas of China.Methods:The study was based on 1 year of data (October 1, 2015 to September 30, 2016) from the National Maternal and Child Health Surveillance System (NMCHSS) from all districts in 334 National Maternal and Child Health Surveillance Districts in 30 Chinese provinces, autonomous regions, and municipalities. Data were analyzed to identify environmental, social, and primary caregiver factors related to RTIs among children under 5.Results:Based on data for the 279 children registered in the NMCHSS during the study period, incidence of RTIs increased with increasing age and was higher for boys than girls. Risk of RTIs depended on distances from the child's home to roads and playgrounds. Enrollment in kindergarten and characteristics of primary caregivers affected risky road behaviors by children. Most primary caregivers (67.4%) reported never using child car seats, and 70.6% reported never using a child helmet. Among primary caregivers without a driver's license, 24.8% reported having driven motor vehicles or motorcycles.Conclusions:The living environment and behaviors of primary caregivers can affect risk of RTIs in children younger than 5 years in rural China. Road safety awareness should be strengthened at the community and kindergarten levels.

Prevalence and impact of bumps, bruises, and other painful incidents among children while handling and riding horses

Horseback riding and related activities bring risks for serious injury. Extant literature focuses largely on moderate to severe horse-related injuries resulting in a need for medical care. Yet incidents deemed as less severe are also important, with potential to impact subsequent safety precautions and behaviors of parents and children. The study objectives were to gather preliminary information about: (1) the prevalence of a range of horse-related painful incidents experienced by children, (2) children's helmet use and supervision, and (3) the subsequent impact of horse-related painful incidents. The methodological approach was based on a questionnaire.One hundred and twenty four child (120 Female; Mage: 11.82 years; rangeage: 8–18; SDage: 2.26) and parent (103 mothers; 16 fathers; 5 other legal guardians) dyads completed a brief 5 minute researcher-generated questionnaire. The results show, that painful incidents are common for children when handling and riding horses, with the majority of children having experienced these incidents more than once. Helmet use and supervision (typically by parents and coaches) were reported to occur consistently during riding, but less commonly during handling (e.g., grooming). Despite the high prevalence of painful incidents, these incidents largely do not impact children's ability to participate in other activities, result in access to specialized medical attention, or alter children's perceptions or behavior around horses. Findings may have implications for safety and education initiatives. Management implicationsFindings from this work suggest several implications. First, in acknowledging the range and frequency of incidents that occur during horse-related activities, educational initiatives should target a broad range of incident types when teaching about horse safety and injury prevention. Second, in recognizing primary caregivers and riding coaches as the most common supervisors of horse-related activities, they should also be targeted in educational initiatives (e.g., horse and safety knowledge, first aid, supervision guidelines). Finally, in developing and implementing targeted safety and injury prevention initiatives, reported benefits of the sport (e.g., improved problem-solving skills) could be used and supported in safety programming.

A quasi-experimental, longitudinal evaluation of a school-based bicycle helmet campaign for children age 4–8 years in the Netherlands

Head injury severity may be reduced by a helmet, however, helmets are not mandatory in the Netherlands. Yet public support for voluntary use of helmets for children is high. This study evaluated the effect of a five-year school-based campaign (4- to 8-year-olds) on helmet-wearing rates and identified its success and failure factors. We compared observed helmet-wearing rates before the campaign, with yearly rates during programme, and related those to wearing rates in a control area. Parents, together with their children, completed questionnaires on self-reported helmet wearing, attitudes, beliefs, and barriers. Results showed that observed helmet wearing increased in the first campaign year but varied in later years. This variation in rates coincided with variations in campaign intensity over the years. Factors associated with self-reported helmet wearing were age, with higher wearing rates for younger children than older children, and parental rules for helmet use. Children and parents are positive toward helmet use when children are perceived to be less competent cyclists. The most important reason for not wearing helmets is that peers do not wear helmets. Overall, parents and children seem to be influenced by the norm in the Netherlands that children above a certain age cycle without a helmet.

Development of Motorcycle helmet for pre-school Children Using Metal Foam

Thailand is second in the road fatality rankings published by World Health Organization in 2015. Almost 80% of traffic deaths involves motorcycles and many of the passengers are children. However, there are still no appropriate head protection equipment for small child pillions. The child helmet should also be lightweight and have high energy absorption. This paper aims to develop a child helmet by using metal foam. The impact tests of the smallest size commercial motorcycle helmet were performed in TIS 369-2557 standard. The finite element model of an existing child helmet was developed and employed to simulate the helmet impact tests using both rigid dummy head and deformable child head. The helmet model was validated with experimental tests to obtain the baseline model. Good agreements can be observed. In addition, the deformable child head can give detail information of brain injury experience by the child during impact. The existing helmet model was redesigned with aluminium foam and was compared with the baseline model after impact tests. Improvement in terms of helmet weight and head injury mitigation can be seen.

Evaluation of an integrated multisector campaign to increase child helmet use in Vietnam

ObjectiveThis study presents child helmet use before, during and after implementing the Vietnamese National Child Helmet Action Plan (NCHAP) and evaluates its effect on child helmet use. The NCHAP, an...

Performance of Children and Adult Alpine Helmets under Characteristic Falling Conditions

Helmeted and unhelmeted impacts of Hybrid III 6-year-old and 50th percentile adult head forms were conducted to assess performance of helmets at characteristic falling conditions at three impact sites. The child head form was impacted at 3.3 m/s, and the adult at 5.5 m/s. The child helmet reduced linear and rotational acceleration by 64% and 62%, compared to the adult helmet which reduced levels by 48% and 50% respectively. The child helmet performed well under lower impact velocity conditions than those tested by helmet certification standards, it is hypothesized the soft comfort foam is responsible for this performance.

Helmet safety for Indonesian children

Global road traffic accidents (RTAs) account for around 1.2 million fatalities annually and alarmingly, 30-40% of these fatalities are children [24]. Even in the UK, 60% of child deaths are from RTAs. In Asia, up to one third of these deaths are due to two-wheelers [24]. Helmets can help reduce fatalities by 25% but studies show compliance as low as 20% in Indonesia. Aims and objectives of the study were to find out why people don’t wear helmets and how to prevent head injuries in Indonesia by assessing the knowledge and attitudes of the public. Observations and interviews were carried out in Jakarta after thorough ethical consideration by the University of Leeds and the Indonesian Ministry of Health. Three observational sittings at the same location recorded characteristics of helmet use with simple analysis. Interviews featured structured questions on the knowledge and attitudes of helmet safety of students and the public. Results were then coded thematically. Observations showed low helmet use for females and children compared to adult males. Many non-wearers were also passengers. Interview results showed poor awareness of the regulations and compliance amongst the public, especially with young males, women, children, and at night. Barriers to compliance of children discussed included the overlying culture amongst Indonesians passed down by parents, the lack of enforcement by parents and police, and peer pressure. Unavailability of correctly fitting helmets for children also affected usage and police stated they were unsure and inconsistent about enforcement on children. Findings on the cultural barriers were consistent with previous studies and emphasise the importance of injury prevention to reduce global child mortality. Recommendations discovered involved media campaigns to target children using influential members. To improve the reliability, further research should be carried out in other Asian countries targeting children directly.

Adult headform impact tests of three Japanese child bicycle helmets into a vehicle

The head is the body region that most frequently incurs fatal and serious injuries of cyclists in collisions against vehicles. Many research studies investigated helmet effectiveness in preventing head injuries using accident data. In this study, the impact attenuation characteristics of three Japanese child bicycle helmets were examined experimentally in impact tests into a concrete surface and a vehicle. A pedestrian adult headform with and without a Japanese child bicycle helmet was dropped onto a concrete surface and then propelled into a vehicle at 35km/h in various locations such as the bonnet, roof header, windshield and A-pillar. Accelerations were measured and head injury criterion (HIC) calculated. In the drop tests using the adult headform onto a concrete surface from the height of 1.5m, the HIC for a headform without a child helmet was 6325, and was reduced by around 80% when a child helmet was fitted to the headform. In the impact tests, where the headform was fired into the vehicle at 35km/h at various locations on a car, the computed acceleration based HIC varied depending on the vehicle impact locations. The HIC was reduced by 10–38% for impacts headforms with a child helmet when the impact was onto a bonnet-top and roof header although the HIC was already less than 1000 in impacts with the headform without a child helmet. Similarly, for impacts into the windshield (where a cyclist’s head is most frequently impacted), the HIC using the adult headform without a child helmet was 122; whereas when the adult headform was used with a child helmet, a higher HIC value of more than 850 was recorded. But again, the HIC values are below 1000. In impacts into the A-pillar, the HIC was 4816 for a headform without a child helmet and was reduced by 18–38% for a headform with a child helmet depending on the type of Japanese child helmet used. The tests demonstrated that Japanese child helmets are effective in reducing accelerations and HIC in a drop test using an adult headform onto a relatively rigid hard surface, i.e., simulating a road surface or concrete path. However, when the impact tests are into softer surfaces, the child helmet’s capacity to decrease accelerations is accordingly reduced. Impacts into the windshield, while below the critical HIC value of 1000, indicated higher HIC values for a headform with a child helmet compared to an adult headform without a child helmet. The unpredictable nature of the results indicates further research work is required to assess how representative the stiffness of an adult headform is when compared to an actual head.

Türkiye'deki Trafik Kazalarının Analizi

Summary Turkey is among the ten countries constituting almost half of the global traffic accident deaths. As regard to their frequencies, health and economic outcomes, traffic accidents must have a priority in public health agenda. From the epidemiological perspective, within the vehicle, person and the environment components; person (driver, occupant, pedestrian) (99.12 %) is the most responsible component for the traffic accidents. According to the accident statistics, drivers have the biggest defect share with a 95 % ratio. Main components of the driver defect are; speed, alcohol and substance use, sleep and fatigue, not using safety belt, child car seat and helmet. Related legislation has been developed in Turkey but is not applied as it should be.The United Nations has developed a Global Plan for the Decade of Action for Road Safety 2011-2020 to decrease the traffic accidents and burden of disease all over the world and especially in the low and middle-income countries. The objective of this article is to draw attention to the problem of road safety and traffic accidents in Turkey.

The safety challenge of increased cycling

Many countries have recently set out policy frameworks to support the growth of cycling. However, increased cycling can mean more collisions, injuries and even fatalities. This paper discusses the role of safety in cycling policy in the particular case of Ireland, which is one of the countries that has a government-endorsed policy to increase cycling. It examines available information on cycling, including police-reported accident data over the last fifteen years and more recent hospital accident data. Comparisons are made for injuries between the two sources and data matching and capture–recapture methods used to estimate injuries. The deficiencies in data are analysed and suggestions for improvements made. It is argued that gaps in available data have led to accident risks being poorly understood. The paper discusses how a convergence in cycling and safety policy can be achieved and suggests additional measures including a cycling safety target, increased communication on cycling safety, lower urban speeds and compulsory wearing of helmets for children.

Parenting Influences on Bicycle Helmet Rules and Estimations of Children's Helmet Use

ABSTRACT The present study examined the potential relationship between parenting variables and estimations of children's bicycle helmet use. Parents (N = 121) completed surveys asking about parental monitoring and questions about their bicycle habits and attitudes, as well as their expectations for their children to wear a helmet and their estimation of how often their children wear a helmet. Parents reported stronger helmet rules for their children who are beginning cyclists rather than experienced cyclists, and rules for experienced cyclists were more strongly endorsed among parents who reported more parental monitoring as well. Parents who wear helmets themselves endorsed stronger helmet rules for their experienced riders, compared to parents who do not wear helmets. Parents without helmet rules reported more peer pressure in that they were more likely to agree that their friends do not make their kids wear helmets and that their child's friends do not wear helmets. In addition, believing other parents do not wear helmets and believing one's child's friends do not wear helmets were both associated with a lower likelihood that their children wear a helmet. This appears to be the first study linking perceptions of parental peer pressure with helmet rules and use. For public health reasons, it is imperative to examine parental factors that may establish children's helmet wearing.

Helmets for Kids programme increases helmet use among students

BackgroundResearch reveals that child helmet use rates in Vietnam are very low, despite legislation mandating that children 6 years and above must wear helmets. With motorcycles comprising 95% of all...

Peak acceleration during impact with helmet materials: Effects of impactor mass and speed

The impact properties of six foam materials used for energy absorption as the liner of children's helmets, reported by Gimbel and Hoshizaki are considered further. In high-energy impacts, almost complete compression of the energy-absorbing material (bottoming out) may occur, and the severity of the impact increases greatly. Too soft a material means bottoming out occurs at low speeds, but if it is too stiff, the material itself is injurious. The fitting of equations to results in ‘no bottoming out’ and ‘bottoming out’ conditions may help assessment of what compromise is appropriate. The equations in this article correspond to peak acceleration being proportional to power functions of impactor speed and mass. 1. When there was no bottoming out, peak acceleration was found to be proportional to m ∧(c−1).v ∧(2c), with c being approximately 0.25. 2. For bottoming out, peak acceleration was found to be proportional to m ∧(p).v ∧(q), with p and q being approximately 2 and approximately 3. 3. The constants of proportionality were related to material density in a regular way.

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