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[Analysis of the mechanism of tibial injury in cases of automobile-pedestrian collisions].

The type and the mechanism of development of lower extremity injuries suffered during traffic accidents between cars and pedestrians were studied in 93 accidents with frontal or almost frontal collision. Evaluation was based upon the facts of the investigation and the opinions of medical and technical experts. In 28% of the cases lower extremity injuries were not demonstrable, in 21% of the cases there were only soft part injuries at the site of primary collision, while in 51% bone fractures were also diagnosed. The collision speed and the injury severity score (ISS) are in a statistically significant correlation. In the case of lower extremity injuries, in higher speed categories, such definite correlation was demonstrable only for injured persons over 60 years of age, and no such correlation existed for younger people. This difference is explained by age-related biological differences (osteoporosis, reduced elasticity).