Shanahan D F
Aviat Space Environ Med. 1983 Jul;54(7):628-31.
Of the 222 flight helmets retrieved from Army aircraft accidents during 1971-79 under the Aviation Life Support Equipment Retrieval Programs, 175 were SPH-4 helmets that were analyzed for physical damage and for the relationship of damage to injury sustained by the wearer. This analysis showed that lateral impacts resulted in a significantly higher rate of serious injury (AIS greater than or equal to 4) than impacts to other regions (68% versus 46%, p less than 0.001) Lateral impacts yielded a higher rate of basilar skull fracture than impacts to other areas of the helmet (46% versus 18%, p less than 0.001). It is concluded that lack of energy-absorbing material in the lateral portions of the helmet causes the high rate of basilar skull fracture and the increased prevalence of severe injury associated with lateral impacts. The incorporation of an energy-absorbing earcup design is recommended to reduce the high rate of severe injuries associated with lateral impacts.
在1971年至1979年期间，根据航空生命支持设备回收计划从陆军飞机事故中回收的222顶飞行头盔中，有175顶是SPH - 4头盔，对其进行了物理损伤分析以及损伤与佩戴者所受伤害之间关系的分析。该分析表明，与头盔其他部位受到的撞击相比，侧向撞击导致严重伤害（简明损伤定级[AIS]大于或等于4）的发生率显著更高（分别为68%和46%，p < 0.001）。与头盔其他部位受到的撞击相比，侧向撞击导致颅底骨折的发生率更高（分别为46%和18%，p < 0.001）。得出的结论是，头盔侧面缺乏能量吸收材料导致了颅底骨折的高发生率以及与侧向撞击相关的重伤患病率增加。建议采用能量吸收式耳罩设计，以降低与侧向撞击相关的重伤高发生率。
