摘要
文中介绍了不同环境压力（５３．９９ｋＰａ、６１．３３ｋＰａ和９６．６０ｋＰａ）对大鼠冲击伤伤情的影响。冲击波超压峰值为１９０．４０ｋＰａ，正压持续时间为１０ｍｓ，结果表明随着环境气压降低，冲击波所引起的大鼠死亡率明显增加，肺损伤程度明显加重。伤后６ｈ时５３．９９ｋＰａ、６１．３３ｋＰａ和９６．６０ｋＰａ暴露组的死亡率分别３６．８％、２５％和０％，肺出血面积分别为６５３．２１±６５２．２５ｍｍ２、３１３．５０±３５７．２５ｍｍ２和６３．７５±６９．０１ｍｍ２，肺体指数分别为１．５０５％±０．７７％、１．３１％±０．６５％和０．９３％±０．２１％。结果揭示环境气压降低可降低动物对冲击波的耐受性，使死亡率增加，肺损伤程度加重。
The effects of the ambient pressure of 53.99,6l.33 and 96.60 kPa on the severity of l90.40kPa and a duration of l0 ms were studied in rats.It was found that both the mortality and the severity of pulmonary injury were significantly increased when the ambient pressure was being decreased.The mortality rate 6h after was 36.8%,25%and 0%,the hemorrhagic area on the lungs was 653.21±652.25mm2,313.50±357.25 mm2 and 63.75±69.01 mm2 and the lung/body index was l.50%±0.77%,1.31%±0.65%and 0.93%±0.21%when the ambient pressure was 53.99,61.33 and 96.60 kPa respectively,Our finding indicate that the decrease of ambient pressure can decrease the tolerance of the animals to blast wave by showing an increase of mortality and an aggravation of pulmonary injury.
出处
《第三军医大学学报》
CAS
CSCD
北大核心
1994年第4期274-276,共3页
Journal of Third Military Medical University
关键词
冲击伤
死亡率
环境气压
blast injuries
atmospheric,pressure
mortality
rat
