helmet

Construction helmets are considered essential personal protective equipment for reducing traumatic brain injury risks at work sites. In a study, we proposed a practical finite element modeling approach that would be suitable for engineers to optimize construction helmet design. The finite element model includes all essential anatomical structures of a human head (i.e. skin, scalp, skull, cerebrospinal fluid, brain, medulla, spinal cord, cervical vertebrae, and discs) and all major engineering components of a construction helmet (i.e. shell and suspension system). The head finite element model has been calibrated using the experimental data in the literature. It is technically difficult to precisely account for the effects of the neck and body mass on the dynamic responses, because the finite element model does not include the entire human body. An approximation approach has been developed to account for the effects of the neck and body mass on the dynamic responses of the head-brain. Using the proposed model, we have calculated the responses of the head-brain during a top impact when wearing a construction helmet. The proposed modeling approach would provide a tool to improve the helmet design on a biomechanical basis 1).

Neurotrauma from snow-sports related injuries is infrequently documented in the literature. In Australia no collective data has ever been published. The aim of this study is to document the injury pattern of snow sports related neurotrauma admissions to The Canberra Hospital, the regional trauma centre for the Snowy Mountains. A computerised hospital record search conducted between January 1994 and July 2002 revealed 25 head and 66 spinal injury admissions. The incidence of severe injuries requiring referral to tertiary trauma hospital was estimated to be 7.4 per 100,000 skier-days and for head and spinal injury 1.8 per 1,000,000 skier-days and 5.6 per 1,000,000 skier-days, respectively. Collision with a stationary object was disproportionately associated with head injury and falling forward with spinal injury. Snowboarders tended to sustain cervical fractures more often than skiers. The importance of helmet usage in buffering the impact of head-on collision and the proposition of having both feet fastened to a snowboard in leading to cervical injury were highlighted 2).

Helmets may provide some protection from head injury among skiers and snowboarders involved in falls or collisions 3).

Similar to bicycle helmet promotion programs, ski and snowboard helmet campaigns should focus on delivering a positive image of helmet use and peer acceptance 4).

Parent's helmet-wearing behavior was strongly associated with the child/adolescent's helmet-wearing behavior. The results demonstrate the overwhelming influence parental helmet use has on their child/adolescent's decision to wear a helmet 5).

Skiing

The incidence of possible concussion is high among snowboarding class participants. Emphasis should be given for instituting pre-participation balance training, especially for females to reduce falling in snowboarding. To verify the effects of pre-participation balance training and falling results in a concussion, more research is needed in the future.

Frequently involving occipital impact, could lead to more major head injuries. Measures should be taken to protect the head, especially the occiput, in snowboarding 6).

Not wearing a helmet and riding on icy slopes emerged as a combination of risk factors associated with injury.

Several risk factors and combinations exist, and different risk profiles were identified. Future research should be aimed at more precise identification of groups at risk and developing specific recommendations for each group-for example, a snow-weather conditions index at valley stations 7).

The association between helmet use during alpine skiing and incidence and severity of head injury was analyzed. All patients admitted to a Level I Trauma Center for traumatic brain injurys (TBI) sustained due to skiing accidents during the seasons 2000/01-2010/11 were eligible. Primary outcome was the association between helmet use and severity of TBI measured by Glasgow Coma Scale (GCS), CT-results, and necessity of neurosurgical intervention. Of 1362 patients injured during alpine skiing, 245 (18%) sustained TBI and were included. TBI was fatal in 3%. Head injury was minor (GCS 13-15) in 76%, 6% moderate and 14% severe. Number and percentage of TBI patients showed no significant trend over the investigated seasons. Forty-five percent of the 245 patients had pathological CT-findings and 26% of these required neurosurgical intervention. Helmet use increased from 0% in 2000/2001 to 71% in 2010/2011 (p<0.001). The main analysis, comparing TBI in patients with or without a helmet, showed an adjusted Odds Ratio (OR) of 1.44 (p=0.430) for suffering moderate head injury to severe head injury in helmet users. Analyses comparing off-piste to on-slope skiers revealed a significantly increased OR among off-piste skiers of 7.62 (p=0.004) for sustaining a TBI requiring surgical intervention. Despite increases in helmet use Baschera et al., found no decrease in severe TBI among alpine skiers. Logistic regression analysis showed no significant difference in TBI with regard to helmet use, but increased risk for off-piste skiers. The limited protection of helmets and dangers of skiing off-piste should be targeted by prevention programs 8).

see Helmet for motorcycle.


1)
Wu JZ, Pan CS, Wimer BM, Rosen CL. Finite element simulations of the head-brain responses to the top impacts of a construction helmet: Effects of the neck and body mass. Proc Inst Mech Eng H. 2017 Jan;231(1):58-68. doi: 10.1177/0954411916678017. PubMed PMID: 28097935.
2)
Siu TL, Chandran KN, Newcombe RL, Fuller JW, Pik JH. Snow sports related head and spinal injuries: an eight-year survey from the neurotrauma centre for the Snowy Mountains, Australia. J Clin Neurosci. 2004 Apr;11(3):236-42. PubMed PMID: 14975409.
3)
Mueller BA, Cummings P, Rivara FP, Brooks MA, Terasaki RD. Injuries of the head, face, and neck in relation to ski helmet use. Epidemiology. 2008 Mar;19(2):270-6. doi: 10.1097/EDE.0b013e318163567c. PubMed PMID: 18277163.
4)
Peterson AR, Brooks MA. Pilot study of adolescent attitudes regarding ski or snowboard helmet use. WMJ. 2010 Feb;109(1):28-30. PubMed PMID: 20942297; PubMed Central PMCID: PMC2957671.
5)
Provance AJ, Engelman GH, Carry PM. Implications of parental influence on child/adolescent helmet use in snow sports. Clin J Sport Med. 2012 May;22(3):240-3. doi: 10.1097/JSM.0b013e3182410335. PubMed PMID: 22270869
6)
Nakaguchi H, Fujimaki T, Ueki K, Takahashi M, Yoshida H, Kirino T. Snowboard head injury: prospective study in Chino, Nagano, for two seasons from 1995 to 1997. J Trauma. 1999 Jun;46(6):1066-9. PubMed PMID: 10372627.
7)
Hasler RM, Berov S, Benneker L, Dubler S, Spycher J, Heim D, Zimmermann H, Exadaktylos AK. Are there risk factors for snowboard injuries? A case-control multicentre study of 559 snowboarders. Br J Sports Med. 2010 Sep;44(11):816-21. doi: 10.1136/bjsm.2010.071357. PubMed PMID: 20820060.
8)
Baschera D, Hasler RM, Taugwalder D, Exadaktylos A, Raabe A. Association between head injury and helmet use in alpine skiers: Cohort study from a Swiss level I trauma center. J Neurotrauma. 2014 Sep 22. [Epub ahead of print] PubMed PMID: 25244343.
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