尸体早期直肠温度与死亡时间关系的理论研究

A theoretical Consideration on the Relationship of Changes in Rectal Temperature with the Death Time of a Victim

从理论上探讨尸体早期温度变化的规律,为用直肠温度准确推定尸体的死亡时间提供理论依据。根据非平衡热力学的基本观点,我们将人体死后温度的下降过程简化为单一的圆柱体径向热传导过程,在圆柱边界条件下求解热传导方程,获得了尸体直肠温度与死亡时间的理论表式。研究表明:尸体早期直肠温度可表示为一无穷级数;级数各项都随死亡时间按指数规律下降;环境温度、体形对直肠温度有明显影响。数值计算结果与有关文献结论一致。

It is of utmost importance in the practice of forensic medicine to determine the death time of a cadaver. The authors claimed that changes in rectal temperature were closely related to ambient temperature and the stature of the cadaver. The deduction of this conclusing was formulated in detail.