Objective: To explore the degree of craniocerebral damage that influenced by the landing distance infalling accidents. Methods: 34 clinical falling cases of craniocerebral injury were selected. The relationshipbetween landing distance and impact direction was observed by epidemiological retrospective study. All thecases were scanned by multi-slice CT (MSCT) for virtual autopsy (virtopsy) analysis. Aided by ANASYScomputer software, a finite elements model of three dimensional finite elements was used to analyze thedistribution of stress and strain on the skull. Three height degrees were used to simulate falling from building,bicyclers and pedestrians, respectively. Results: The maximum stress and strain on skull varied with changes offalling height. Because there were different results between face- and occipital- side that touched ground, thefalling injuries under the two conditions above showed different damage degree even in a same height.Conclusions: It is feasible to estimate fallen distance according to the damage degree measured by virtopsy andcomputer simulation. This finite elements analysis (FEA) may be helpful for establishing failure criteria for thecraniocerebral injury in falls.
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