枪伤脊椎致脊髓损伤的机理研究

The Mechanism of Spinal Cord Injury During Gun Shot Injury of Spine

脊椎枪伤子弹通过椎管之外,脊髓发生损伤的机理为何?本试验于猪马尾部及脊髓处按置压力传感器,子弹通过T13～L2椎管周围,测试椎管内致伤脊髓的压力。按脊椎损伤部位:椎管贯通伤,压力在17×10~5Pa与56×10~5Pa之间,脊髓皆断裂,系弹丸直接损伤。椎管周壁伤包括棘突根、椎板、椎体损伤。压力在33.3～95×10~5Pa间为完全性脊髓损伤。脊椎周围损伤,包括棘突尖、间隙、椎体前缘伤,压力在10×10~5pa上下者为不完全脊椎损伤,在5×10~5Pa者,为脊髓轻微损伤。

As the gun shot wound outside the vertebral canal of the spine, what is the mechanism of spinal cord injury (SCI) ? We put transducers at the cauda equina or spincal cord in the vertebral canal to estimate intracanal pressure during sun shot injury at the spine. The results showed that: in penerating wound of vertebral canal the pressure was between17×10~5Pa and 56×10~5Pa and the spinal cord was brocken directly by the bullet. In pericanal wounds, such as lamina, root of spinous process or vertebral body, the pressures were at 33. 3～95×10~5Pa. All of these wounds were complete SCI. In perispinal wounds such as tip and interspace of spinous process, anteror border of vertebral body, they were incomplete SCI, the pressures were usually 10×10~5Pa. If the intracanal pressure was not determined determinafted, there was usually no SCI.