固定双上肢并悬挂家兔死亡机理的研究

目的观测固定双上肢并悬挂家兔的血气变化及膈肌的肌电变化,探讨体位性窒息死亡的发生机制。方法建立家兔体位性窒息死模型,在实验前、后分别抽取家兔耳缘动脉和左心室血2m l进行血气分析,并监测实验过程中家兔膈肌肌电图(EMGd i)的变化。结果实验组与对照组均有缺氧、二氧化碳储留以及氧饱和度下降,但是实验组的二氧化碳储留比对照组低,氧饱和度比对照组高,缺氧情况比对照组低。在连续记录的EMGd i中,早期EMGd i较晚期EMGd i的高频与低频(H/L)比值显著降低,超过20%。结论固定双上肢并悬挂家兔死亡与膈肌疲劳导致缺氧窒息有关

Study on the mechanism in death from hanging by bound limbs in rabbits

Objective To study the mechanism in death from positional asphyxia by determination of blood-gas and record of diaphragmatic electromyogram(EMGdi) in rabbits hanged by bound limbs.Methods After model of the positional asphyxia death was established,blood-gas analysis was conducted in both the experimental and control groups.During the experiment course,EMGdi was continuously monitored.Results Decrease in PaO_2 and SaO_2 and increase in PaCO_2 were detected in both the experimental and control animals.But the increase in PaCO_2 in experimental group was less than that in control group,and the decrease in PaO_2 and SaO_2 in the experimental group is less than in the control group.By analyzing the ratio of high to low frequency in EMGdi between pre-and post-experiment,it is noted that there was a significant decrease of the ratio of H/L,which exceeded 20%.Conclusion Death in the rabbits hang with bound limbs is associated with asphyxia which may be caused by diaphgram fatigue.