皮肤组织热水烫伤传热分析

Analysis of Heat Transfer in Skin Tissues Subjected to Hot Water.

目的研究生物组织热水烫伤过程的传热规律及影响因素并由此进行烫伤程度预测。方法基于Pennes生物传热方程 ,建立热水洒落皮肤组织所致烫伤过程的一般模型 ,研究生物组织内部的温度变化规律 ,并对生物组织烫伤程度进行预测。结果通过数值计算 ,得到生物组织内部的温度分布 ,以及生物组织烫伤发生的开始时间。研究表明 ,皮肤及内部组织初始温度分布、热水与皮肤表面的对流换热系数及热水的温度对于烫伤的发生有显著影响。结论该模型可用于生物组织热水烫伤过程传热分析和烫伤预测 。

Objective To analyze heat transfer process in skin tissues subjected to hot water and thus to predict the extent of scald. Method Basing on Pennes′ Bio heat Equation,a model for characterizing the damage process in tissues was presented and used for its analysis. Result Temperature distribution in the tissues during the process and the time of beginning of scald were numerically obtained. It was found that the effects of different initial temperature distribution, convection coefficients between the hot water and the tissue surfaces, and the temperature of the hot water are significant. Conclusion The transient heat transfer behavior in multi layer tissues subjected to hot water can be predicted by the present model. It is useful in the clinical diagnosis and therapy for the scald caused by hot water.