<strong>Objective:</strong> To explore the characteristics and mechanisms of serious injuries of chest caused by road traffic accidents. <strong>Methods:</strong> Totally 112 autopsy cases with...<strong>Objective:</strong> To explore the characteristics and mechanisms of serious injuries of chest caused by road traffic accidents. <strong>Methods:</strong> Totally 112 autopsy cases with chest injuries in the urban of Jingzhou road traffic accidents were collected. Systematic review and analysis of the general information, postmortem examinations and assessments of chest injury had carried out from Feb. 2016 to Mar. 2018. <strong>Results:</strong> Average age of the victims was 52.2 years and the ratio of male to female deaths was 2.39:1. The proportion of motor-cyclists and pedestrians increased significantly. The overwhelming majority of accident vehicles were motorcycles and bicycles. Fractures of ribs and pulmonary contusion were the most common injuries. Craniocerebral and abdominal injuries were the most common associated injuries. <strong>Conclusion:</strong> Fractures of ribs and pulmonary contusion were the most common features of fatal road traffic injuries, often associated with vitreoretinal damage and serious multiple damages. These features reflect the characteristics of great violence in traffic accidents, which provides the evidence of identification of violent injuries.展开更多
Objective： To explore the relationship between the collision parameters of vehicle and the pedestrian thorax injury by establishing the chest simulation models in car-pedestrian collision at different velocities and ...Objective： To explore the relationship between the collision parameters of vehicle and the pedestrian thorax injury by establishing the chest simulation models in car-pedestrian collision at different velocities and angles. Methods： 87 cases of vehicle-to-pedestrian accidents, with detailed injury information and determined vehicle impact parameters, were included. The severity of injury was scaled in line with the Abbreviated Injury Scale （AIS）. The chest biomechanical response parameters and change characteristics were obtained by using Hyperworks and LS-DYNA computing. Simulation analysis was applied to compare the characteristics of injuries. Results： When impact velocities at 25, 40 and 55 km/h, respectively, 1） the maximum values of thorax velocity criterion （VC） were for 0.29, 0.83 and 2.58 m/s; and at the same collision velocity, the thorax VC from the impact on pedestrian＇s front was successively greater than on his back and on his side; 2） the maximum values of peak stress on ribs were 154,177 and 209 MPa; and at the same velocity, peak stress values on ribs from the impact on pedestrian＇s side were greater than on his front and his back. Conclusion： There is a positive correlation between the severity and risk of thorax injury and the collision velocity and angle of car-thorax crashes. At the same velocity, it is of greater damage risk when the soft tissue of thorax under a front impact; and there is also a greater risk of ribs fracture under a side impact of the thorax. This result is of vital significance for diagnosis and protection of thorax collision injuries.展开更多
Thorax injury is one of the main injuries during pedestrian impacts,and vehicle collision plays an important role in increasing the risk of pedestrian thorax injury.It is necessary to conduct in-depth research on the ...Thorax injury is one of the main injuries during pedestrian impacts,and vehicle collision plays an important role in increasing the risk of pedestrian thorax injury.It is necessary to conduct in-depth research on the influence of vehicle front structural parameters on thorax injury in pedestrian accidents.Accident statistical analysis is conducted based on 452 cases from the future mobile traffic accident scenario study(FASS)database.There are differences in the severity of thorax injuries caused by different types of vehicles.Then,a typical pedestrian thorax injury accident in the FASS database is simulated,and the effectiveness of the model is verified.Finally,149 simulations are conducted based on the model,and the relationship between the front structural parameters and pedestrian kinematic response and thorax injury values is analyzed using multiple linear regression methods.The significant probability p of the influence of the bonnet angle(BA),bonnet length(BL),bonnet leading edge height(BLEH),and bumper bottom height(BBH)on pedestrian thorax injuries are as follows:0.000,0.953,0.000,and 0.797,respectively.This indicates that BA and BLEH have significant influences on thorax injuries,while BBH and BL have little influence.And when the BLEH and BA values increase,the thorax acceleration value tends to increase.展开更多
文摘<strong>Objective:</strong> To explore the characteristics and mechanisms of serious injuries of chest caused by road traffic accidents. <strong>Methods:</strong> Totally 112 autopsy cases with chest injuries in the urban of Jingzhou road traffic accidents were collected. Systematic review and analysis of the general information, postmortem examinations and assessments of chest injury had carried out from Feb. 2016 to Mar. 2018. <strong>Results:</strong> Average age of the victims was 52.2 years and the ratio of male to female deaths was 2.39:1. The proportion of motor-cyclists and pedestrians increased significantly. The overwhelming majority of accident vehicles were motorcycles and bicycles. Fractures of ribs and pulmonary contusion were the most common injuries. Craniocerebral and abdominal injuries were the most common associated injuries. <strong>Conclusion:</strong> Fractures of ribs and pulmonary contusion were the most common features of fatal road traffic injuries, often associated with vitreoretinal damage and serious multiple damages. These features reflect the characteristics of great violence in traffic accidents, which provides the evidence of identification of violent injuries.
基金The Natural Science Foundation of China （Project number 31271006）, the Chongqing Natural Science Fund （Project number CSTC2012JJYS0004）.
文摘Objective： To explore the relationship between the collision parameters of vehicle and the pedestrian thorax injury by establishing the chest simulation models in car-pedestrian collision at different velocities and angles. Methods： 87 cases of vehicle-to-pedestrian accidents, with detailed injury information and determined vehicle impact parameters, were included. The severity of injury was scaled in line with the Abbreviated Injury Scale （AIS）. The chest biomechanical response parameters and change characteristics were obtained by using Hyperworks and LS-DYNA computing. Simulation analysis was applied to compare the characteristics of injuries. Results： When impact velocities at 25, 40 and 55 km/h, respectively, 1） the maximum values of thorax velocity criterion （VC） were for 0.29, 0.83 and 2.58 m/s; and at the same collision velocity, the thorax VC from the impact on pedestrian＇s front was successively greater than on his back and on his side; 2） the maximum values of peak stress on ribs were 154,177 and 209 MPa; and at the same velocity, peak stress values on ribs from the impact on pedestrian＇s side were greater than on his front and his back. Conclusion： There is a positive correlation between the severity and risk of thorax injury and the collision velocity and angle of car-thorax crashes. At the same velocity, it is of greater damage risk when the soft tissue of thorax under a front impact; and there is also a greater risk of ribs fracture under a side impact of the thorax. This result is of vital significance for diagnosis and protection of thorax collision injuries.
文摘Thorax injury is one of the main injuries during pedestrian impacts,and vehicle collision plays an important role in increasing the risk of pedestrian thorax injury.It is necessary to conduct in-depth research on the influence of vehicle front structural parameters on thorax injury in pedestrian accidents.Accident statistical analysis is conducted based on 452 cases from the future mobile traffic accident scenario study(FASS)database.There are differences in the severity of thorax injuries caused by different types of vehicles.Then,a typical pedestrian thorax injury accident in the FASS database is simulated,and the effectiveness of the model is verified.Finally,149 simulations are conducted based on the model,and the relationship between the front structural parameters and pedestrian kinematic response and thorax injury values is analyzed using multiple linear regression methods.The significant probability p of the influence of the bonnet angle(BA),bonnet length(BL),bonnet leading edge height(BLEH),and bumper bottom height(BBH)on pedestrian thorax injuries are as follows:0.000,0.953,0.000,and 0.797,respectively.This indicates that BA and BLEH have significant influences on thorax injuries,while BBH and BL have little influence.And when the BLEH and BA values increase,the thorax acceleration value tends to increase.
