The Hematoma Expansion And Increasing Pressure In Traumatic Brain Injuries In The Finite Element Simulation Analysis

In the traffic accident, pedestrians and non-motor vehicles cyclists, as vulnerable road users, represent a population with high risk of fatal and severe injuries in mixed traffic environment. And head traumas are most likely to result in severe inj ury and death. In China, the economic development and the rapid increases in the number of vehicles have resulted in an increased accident rate, with head injuries making up a significant proportion of injuries suffered in traffic accidents. Therefore, it is vital to conduct research about types of head injurie s, injury mechanisms, injury tolerance and protective measures in China.Two typical pedestrian accidents were analyzed and reconstructed by using the multi-body pedestrian model and GHBMC-head FE model, incorporating data from the Third Xiangya Hospital of Central South University in this study. Pedestrians’ dynamic responses were reconstructed, and the injury criterion indices calculated from these reconstructions were compared with diagnosis reports, demonstrating that this model has the capability to predict injuries while the calculated injury indices indicate a good ability to analysis the mechanism of brain injury hematoma in traffic accident.In this study, the corpuscular particle method was proposed to simulate the cerebral hematoma lead to changes in intracranial pressure. Geometrical data and position of the cerebral hematoma were extracted from a set of medical CT scan images, we used these data to adjust the head model of GHBMC to the geome try of head of patients. Then using corpuscular particle method to simulate the cerebral hematoma lead to changes in intracranial pressure. Through the value of midline, shift of the lateral ventricle and intracranial pressure compared with clinical data t o demonstrate the effectiveness of the proposed method. Each part of the brain tissue pressure distribution can be observed and the largest position of intracranial pressure can be obtained for clinical implantation of intracranial pressure probe to provid e accurate location while the method was feasible.