论文部分内容阅读
目的在生物碰撞实验平台基础上,用成体香猪开展头盆向碰撞减速实验,研究直升机坠落事故(垂直向碰撞)的损伤特点。方法成年从江香猪18只,根据速度差变化简单随机抽样分为2组(n=9);猪以“仰卧位”固定,进行头盆向刚性碰撞模拟直升机垂直坠落,碰撞速度分别设置为Ⅰ组:8 m/s,Ⅱ组11 m/s;观察碰撞后即刻至伤后6 h两组的存活情况、形态学改变、血气指标的变化,进行损伤组织的影像学观察,分析简明损伤评分(AIS)、损伤严重程度评分(ISS)的情况。结果Ⅰ组速度差(8.21±0.13)m/s,Ⅱ组速度差(10.69±0.41)m/s,垂直向减速度载荷分别为127.85 g和164.35 g,动物中枢神经系统、脊柱和胸腹重要脏器均出现损伤,ISS评分分别为(26.67±5.02)分和(52.71±6.13)分(P<0.05),动物总体伤情达到重伤和危重伤。结论成功制作直升机垂直碰撞的重伤与危重伤动物模型,初步明确脾破裂、肺挫伤为其胸腹部损伤的特点。
Objective Based on the experimental platform of biological clash, the experiment of reducing the head-basin collision was carried out with the adult pig, and the damage characteristics of the helicopter crash accident (vertical collision) were studied. Methods 18 adult Xiangjiang pigs were randomly divided into 2 groups (n = 9) according to the difference of speed difference. The pigs were fixed with “supine position”, and the vertical collision of the head basin to the rigid collision simulation helicopter was carried out. The impact velocity The group Ⅰ was set as 8 m / s and the group Ⅱ 11 m / s. The survival, morphological changes and blood gas indexes of the two groups were observed immediately after the collision and the changes of the blood gas indexes were observed. Concise Injury Score (AIS), and Injury Severity Score (ISS). Results The velocity difference of group Ⅰ was 8.21 ± 0.13 m / s, that of group Ⅱ was 10.69 ± 0.41 m / s, and the loads of vertical deceleration were 127.85 g and 164.35 g, respectively. The central nervous system, spine and chest and abdomen of animals were significant The organs were damaged. The ISS scores were (26.67 ± 5.02) and (52.71 ± 6.13) points respectively (P <0.05). The overall animal injuries reached serious and critical injuries. Conclusion The models of severe and critically injured animals in vertical collisions of helicopters were successfully produced, and the characteristics of spleen rupture and pulmonary contusion were defined as their chest and abdomen injuries.