Perhaps the most compelling observation in recent years is that subdural hemorrhages are present in nearly half of normal, healthy newborns with no evidence of birth trauma. These findings, combined with the immature anatomy of the infant dura, suggest that dural bleeding in young babies may be a natural protective device – a reservoir to prevent backflow into the brain’s blood vessels during the pressure fluctuations of normal labor and delivery.
也许最近几年来最有说服力的发现是，膜下出血现象在近一半的没有分娩外伤痕迹的健康新生儿身上出现。这些发现，加上婴儿硬脑膜发育不成熟，表明新生儿脑膜出血可能是天然保护机制——为了防止正常劳作和分娩时压力波动造成血液回流大脑血管。