K^+/Na^+比值与损伤时间的关系

THE SIGNIFICANCE OF DETERMINING K^+/N_a ^+ RATIO FOR TIMING OF THE WOUNDS

本文使用原子吸收光谱法测定12只大鼠36个烧伤局部肌肉标本的 K^+/Na^+值,检测结果:生前60、 30、 15min 以及死后20min 肌肉标本的 K^+/Na^+值比对照组分别下降:69～94％(平均86％)、56～89％(平均77％)、47～82％(平均71％)、4～38％(平均27％),此结果经统计学处理,表明生前伤与死后伤的 K^+/Na^+比值的下降率有明显差异。同时发现生前损伤的各实验组随存活时间的延长,K^+/Na 比值的下降率有增加的倾向。笔者认为,此方法是烧伤时间推断的一种简便,可靠的方法,对法医学实践有一定实用价值。

For the purpose of timing of wounds,the measurement of K^+/Na^+ ratio of 36 specimens of wister rat's muscles taken from the local burn area by the atomic absorption spcetrophometry was carried out. The results showed that K^+/Na^+ ratio in specimens of burn formed 15,30,60 minutes before death and 20 minutes after death reduced 47～82%(mean 71%), 56～89%(mean 77%),69～94%(mean 86%)and 4～38%(mean 27%)respectively as compared with the control muscles.Reduction rate of K^+/Na^+ ratio in ante- mortem group was more obvious than the postmortem ones.With the prolongation of the antemortem interval,the reduction of K^+/Na^+ ratio becomes more marked. We believe that this method is a simple and reliable method in timing wounds and it is valuable in forensic medicine practice.