绝热法无损检测活体组织动脉血温度  

Determining the Arterial Blood Temperature Non-invasively with Method of Thermal Insulation

作　　者：李和杰[1] 张学学[1] 

机构地区：[1]清华大学热能工程系,北京100084

出　　处：《北京生物医学工程》2002年第3期201-203,共3页Beijing Biomedical Engineering

基　　金：清华大学机械工程学院基础研究基金

摘　　要：生物体内的血液流动换热在维持体温恒定和控制体温方面起着至关重要的作用。本文基于Pennes生物传热方程建立了活体组织表面绝热条件下的生物热物理模型 ,通过求解得出体表稳态温度与组织内动脉血温度及其他物性之间的理论关系式 ,并经合理简化得出表面绝热条件下皮表稳态温度即为生物传热方程中采用的动脉血温度的结论。在此基础上 ,建立动脉血温度无损测量实验系统 ,采用该系统对人体小臂、上臂、大腿与小腿等部位进行了测量。实验结果表明 ,这些部位靠近组织表面的动脉血温度低于体核温度 1～ 1 5℃ 。Heat transfer caused by blood flow in biological body plays an important role in maintenance and control of body temperature. In this paper, a bio\|heat physics model, based on Pennes' bio\|heat transfer equation, was established for detecting temperature distributions in the skin tissue subject to thermal insulation at tissue surface. A theoretical relation was obtained between arterial blood temperature in local tissue and the surface steady\|state temperature. After reasonable simplification, it can be considered that the steady\|state surface with thermal insulation temperature was approximately equal to the local arterial blood temperature. An experimental system for measuring arterial temperature non\|invasively was set up. And thus the arterial blood temperature in various locations, including the forearm, upper arm, thigh, and calf, were measured experimentally. The results showed that the arterial blood temperature at different locations is different and 1～1 5℃ lower than the core temperature.

关 键 词：动脉血温度 绝热 无损测量 生物传热 

分 类 号：R318.03[医药卫生—生物医学工程]