抄録
The most serious symptoms in head injuries by Shaken Baby Syndrome (violent shaking as child abuse) is acute subdural hematoma (ASDH). ASDH of infants is high mortality rate and leaves serious aftereffect. It is difficult to get accurate evidence from third parties since the abuse occurs in the home mainly. So, they, who work in medical institutions and polices, would rely on experience and intuition to determine the cause of head injuries. Therefore, in this study, we performed simulation analysis that reproduced the shaking action using a finite element model of infant head to give a scientific basis to the determination. We used 6-month-olds head model which constructed from adult head models and CT scan images of infant head. Input value was defined as the angular velocity and displacement of the head obtained from the vibration experiments with 6-month-olds dummy. ASDH is occurred by the relative rotational motion between the skull and the brain with a rupture of bridging veins, which connect skull and brain. Therefore, we evaluated the relative movement between skull and brain and measured the stretch ratio of bridging veins. Then, we compared the ratio with the threshold witch is rupture value.
