Temperature dependence of thermal conductivity of biological tissues
Temperature dependence of thermal conductivity of biological tissues
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DOI：
10.1088/0967-3334/24/3/312
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发表时间：
2003-08-01
影响因子：
3.2
通讯作者：
Mahajan, RL
中科院分区：
文献类型：
--
作者：
Bhattacharya, A;Mahajan, RL
本文介绍了基于柱面热线法原理的瞬变技术测定生物组织导热系数的实验结果。部署了一种新型的、直径1.45 mm、长50米的热线探头。在海绵、明胶和聚苯乙烯泡沫塑料绝缘上进行了初步测量，以测试探头的准确性。随后对羊胶原蛋白在25℃和55℃范围内进行的实验表明，导热系数是温度的线性函数。此外，热导率的这些变化被发现是可逆的。然而，当组织被加热到55摄氏度以上时，观察到热导率发生了不可逆转的变化。类似的实验也被用来测定奶牛肝脏的导热系数。在这种情况下，不可逆转的影响被发现出现得更晚，大约在90摄氏度左右。低于此温度，在25摄氏度的范围内
In this paper, we present our experimental results on the determination of the thermal conductivity of biological tissues using a transient technique based on the principles of the cylindrical hot-wire method. A novel, 1.45 mm diameter, 50 Trim long hot-wire probe was deployed. Initial measurements were made on sponge, gelatin and Styrofoam insulation to test the accuracy of the probe. Subsequent experiments conducted on sheep collagen in the range of 25 degreesC < T < 55 degreesC showed the thermal conductivity to be a linear function of temperature. Further, these changes in the thermal conductivity were found to be reversible. However, when the tissue was heated beyond 55 degreesC, irreversible changes in thermal conductivity were observed. Similar experiments were also conducted for determining the thermal conductivity of cow liver. In this case, the irreversible effects were found to set in much later at around 90 degreesC. Below this temperature, in the range of 25 degreesC