Biofidelic child head FE model to simulate real world trauma

Roth, Sébastien; Raul, Jean‐Sébastien; Willinger, Rémy

doi:10.1016/j.cmpb.2008.01.007

Cited by 52 publications

(36 citation statements)

References 15 publications

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“…In particular, infant skull is made up of lamellar layer and the Badult^three-layer skull structure does not start to develop until 3-4 years of age [13]. The skull thickness values predicted by the scaling method were also quite different to those from real pediatric subjects [14,15]. As a result, the scaling method was reported to be incapable of predicting realistic head dynamic responses by Roth et al [14].…”

Section: Introductionmentioning

confidence: 98%

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Prediction of skull fracture risk for children 0–9 months old through validated parametric finite element model and cadaver test reconstruction

Liu²,

Zhang

et al. 2015

Int J Legal Med

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Skull fracture is one of the most common pediatric traumas. However, injury assessment tools for predicting pediatric skull fracture risk is not well established mainly due to the lack of cadaver tests. Weber conducted 50 pediatric cadaver drop tests for forensic research on child abuse in the mid-1980s (Experimental studies of skull fractures in infants, Z Rechtsmed. 92: 87-94, 1984; Biomechanical fragility of the infant skull, Z Rechtsmed. 94: 93-101, 1985). To our knowledge, these studies contained the largest sample size among pediatric cadaver tests in the literature. However, the lack of injury measurements limited their direct application in investigating pediatric skull fracture risks. In this study, 50 pediatric cadaver tests from Weber's studies were reconstructed using a parametric pediatric head finite element (FE) model which were morphed into subjects with ages, head sizes/shapes, and skull thickness values that reported in the tests. The skull fracture risk curves for infants from 0 to 9 months old were developed based on the model-predicted head injury measures through logistic regression analysis. It was found that the model-predicted stress responses in the skull (maximal von Mises stress, maximal shear stress, and maximal first principal stress) were better predictors than global kinematic-based injury measures (peak head acceleration and head injury criterion (HIC)) in predicting pediatric skull fracture. This study demonstrated the feasibility of using age- and size/shape-appropriate head FE models to predict pediatric head injuries. Such models can account for the morphological variations among the subjects, which cannot be considered by a single FE human model.

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Section: Introductionmentioning

confidence: 98%

“…The skull thickness values predicted by the scaling method were also quite different to those from real pediatric subjects [14,15]. As a result, the scaling method was reported to be incapable of predicting realistic head dynamic responses by Roth et al [14]. An infant's skull structure changes relatively rapidly across a short duration.…”

Section: Introductionmentioning

confidence: 98%

Prediction of skull fracture risk for children 0–9 months old through validated parametric finite element model and cadaver test reconstruction

Liu²,

Zhang

et al. 2015

Int J Legal Med

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“…In order to study the influence of the size of the subarachnoid space on the bridging veins, a finite element analysis has been preformed. Finite element models have previously been described in the field of forensic sciences and have already been used by Roth et al to compare a shaking event and an impact using a finite element model of a 6-month-old child head [12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Influence of the benign enlargement of the subarachnoid space on the bridging veins strain during a shaking event: a finite element study

et al. 2008

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There is controversy regarding the influence of the benign enlargement of the subarachnoid space on intracranial injuries in the field of the shaken baby syndrome. In the literature, several terminologies exists to define this entity illustrating the lack of unicity on this theme, and often what is "benign" enlargement is mistaken with an old subdural bleeding or with abnormal enlargement due to brain pathology. This certainly led to mistaken conclusions. To investigate the influence of the benign enlargement of the subarachnoid space on child head injury and especially its influence on the bridging veins, we used a finite element model of a 6-month-old child head on which the size of the subarachnoid space was modified. Regarding the bridging veins strain, which is at the origin of the subdural bleeding when shaking an infant, our results show that the enlargement of the subarachnoid space has a damping effect which reduces the relative brain/skull displacement. Our numerical simulations suggest that the benign enlargement of the subarachnoid space may not be considered as a risk factor for subdural bleeding.

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“…For example, the sutures and fontanels are very apparent for new-born, while they usually become closed for 3 years old head [14]. The stiffness of pediatric skull is also much lower than that of adult [15]. It is obvious that the mechanical properties of pediatric heads with different ages are usually different, which means that pediatric head material properties are of great uncertainty.…”

Section: Introductionmentioning

confidence: 98%

Effects of brain mechanical properties on child head responses under linear load

Shen

Chen

et al. 2016

Biomed. Eng. Lett.

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Purpose It is usually difficult to obtain the accurate mechanical properties of pediatric brain and skull because of the absence of pediatric cadaver experiments. The goal of this work is to discuss how different brain mechanical properties influence pediatric head response. Methods A validated finite element model of a 3-year-old child head with detailed anatomical structures was used to parametrically investigate the effects of mechanical properties on child head. Taguchi orthogonal method was adopted to decrease the numbers of the simulation under direct impact load.Results With the increase of the skull elastic modulus, the coup pressure decreases significantly (P < 0.001) whereas the contrecoup pressure (P < 0.001) and maximum von Mises stress of skull (P < 0.001) increase significantly. With the increase of the short-time shear modulus of brain tissue, maximum shear stress of brain tissue (P < 0.001) increases significantly whereas the maximum principal strain (P < 0.01) decreases significantly. Conclusions Both Elastic modulus of skull and linear viscoelastic material parameters of brain tissues have statistically significant effects on impact responses of child head. Different material parameters can lead to a great difference on impact responses of child head.

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Biofidelic child head FE model to simulate real world trauma

Cited by 52 publications

References 15 publications

Prediction of skull fracture risk for children 0–9 months old through validated parametric finite element model and cadaver test reconstruction

Prediction of skull fracture risk for children 0–9 months old through validated parametric finite element model and cadaver test reconstruction

Influence of the benign enlargement of the subarachnoid space on the bridging veins strain during a shaking event: a finite element study

Effects of brain mechanical properties on child head responses under linear load

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