THERMAL-CONDUCTIVITY AND DIFFUSIVITY OF BIOMATERIALS MEASURED WITH SELF-HEATED THERMISTORS
THERMAL-CONDUCTIVITY AND DIFFUSIVITY OF BIOMATERIALS MEASURED WITH SELF-HEATED THERMISTORS
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DOI：
10.1007/bf00522151
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发表时间：
1985-01-01
影响因子：
2.2
通讯作者：
DILLER, KR
中科院分区：
文献类型：
--
作者：
VALVANO, JW;COCHRAN, JR;DILLER, KR
介绍了一种测量生物材料导热系数和热扩散系数的实验方法。插入感兴趣组织的自热式热敏电阻探头用于输送热量并监测热量移除速率。经验校准程序允许在广泛的组织温度范围内进行准确的热特性测量。该仪器在三种已知热性能的介质中的操作表明，测量的不确定度约为2%。热导率测量的再现性为0.5%，热扩散率测量的再现性为2%。测量了犬、猪、兔和人体组织的热性能。组织包括肾、脾、肝、脑、心脏、肺、胰腺、结肠癌和乳腺癌。在3 ° C、10 ° C、17 ° C、23 ° C、30 ° C、37 ° C和45°C下测量65个单独组织样品的热性质。结果表明，生物材料的温度系数接近水的温度系数。
This paper presents an experimental method to measure the thermal conductivity and thermal diffusivity of biomaterials. Self-heated thermistor probes, inserted into the tissue of interest, are used to deliver heat as well as to monitor the rate of heat removal. An empirical calibration procedure allows accurate thermal-property measurements over a wide range of tissue temperatures. Operation of the instrument in three media with known thermal properties shows the uncertainty of measurements to be about 2%. The reproducibility is 0.5% for the thermal-conductivity measurements and 2% for the thermal-diffusivity measurements. Thermal properties were measured in dog, pig, rabbit, and human tissues. The tissues included kidney, spleen, liver, brain, heart, lung, pancreas, colon cancer, and breast cancer. Thermal properties were measured for 65 separate tissue samples at 3, 10, 17, 23, 30, 37, and 45°C. The results show that the temperature coefficient of biomaterials approximates that of water.