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| 多温度下死后心血pH值随时间变化的三维拟合函数研究 | |
| 引用本文： | 杨天潼,于永光,孙婷怡,白敬,张海东,白英杰,刘良. 多温度下死后心血pH值随时间变化的三维拟合函数研究[J]. 中国法医学杂志, 2012, 27(4): 268-271 |
| 作者姓名： | 杨天潼 于永光 孙婷怡 白敬 张海东 白英杰 刘良 |
| 作者单位： | 1. 中国政法大学教育部证据科学重点实验室,北京,100040 2. 北京交通大学理学院,北京,100044 3. 华中科技大学同济医学院,湖北武汉,430030 |
| 基金项目： | 国家自然科学基金青年科学基金项目(81001349);中国政法大学青年教师学术创新团队资助项目 |
| 摘 要： | 目的 探讨通过测量多温度条件下家兔右心血液pH值进行死亡时间推断的可行性.方法 48只家兔随机分为6组,空气栓塞法处死后于10℃、15℃、20℃、25℃、30℃和35℃的不同死亡时间点采集右心血液;用PB-10型pH仪测量样本pH值;SPSS统计软件进行回归分析;MATLAB软件进行数学分析.结果 各温度组右心血液pH值变化与死亡时间呈高度相关(R2=0.974 ～0.982);获得拟合的曲面方程.结论 利用插值函数拟合pH值与死亡时间的曲面方程可进行温度变化条件下的死亡时间推断. |
| 关 键 词： | 法医病理学 死亡时间 差值函数 pH值 |
A study on estimation of time since death with pH value by threedimensional curve fitting function at different ambient temperatures |
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| Yang Tiantong,Yu Yongguang,Sun Tingyi,Bai Jing,Zhang Haidong,Bai Yingjie,Liu liang. A study on estimation of time since death with pH value by threedimensional curve fitting function at different ambient temperatures[J]. Chinese Journal of Forensic Medicine, 2012, 27(4): 268-271 | |
| Authors: | Yang Tiantong Yu Yongguang Sun Tingyi Bai Jing Zhang Haidong Bai Yingjie Liu liang |
| Affiliation: | 1/ 1.Key Laboratory of Evidence Science,China University of Political Science and Law,Ministry of Education,Beijing 100040,China;2.School of Science,Beijing Jiaotong University,Beijing 100044,China;3.Faculty of Forensic Medicine,Tongji Medical College,Huazhong University of Science and Technology,Wuhan 430030,China) |
| Abstract: | Objective To investigate applicability of blood pH in the right ventricle to estimation of postmortem interval(PMI).Methods 48 rabbits were sacrificed by air embolism and divided into 6 groups.Blood in the right ventricle were sampled at 10℃、15℃、20℃、25℃、30℃ and 35℃ every two hours up to 66 hours after death.The pH value were determined by PB-10 pH meters.The data were satistically processed by SPSS and METLAB software for Windows.Results pH value in the right ventricle was correlated with the postmortem interval at different ambient temperatures(R2=0.974～0.982)with surface fitting equations obtained.Conclusion Surface equations formulated by interpolation function fitted with blood pH values may be used for PMI estimation at different temperatures. |
| Keywords: | forensic pathology postmortem interval pH interpolation function |
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