首页> 外文期刊>International Journal of Heat and Mass Transfer >Modeling of repeating freezing of biological tissues and analysis of possible microwave monitoring of local regions of thawing
【24h】

Modeling of repeating freezing of biological tissues and analysis of possible microwave monitoring of local regions of thawing

机译:重复冻结生物组织的模型和可能的微波监测解冻区域的分析

获取原文
获取原文并翻译 | 示例
           

摘要

Transient heat transfer problems typical of recent-day cryosurgery are considered. Relatively simple models are suggested to take into account different temperatures of freezing inside the biological cells and in the gaps between the cells. In the most complicated case of interpenetrating media, when there is a thermal contact between the cells and also between the gaps, the model one-dimensional problem is formulated and solved with a specific attention to the effects produced by repeated periods of freezing and thawing. It is shown that the latent heat of melting may lead to a significant difference between temperatures of the cells aggregates typical of tumors and the extracellular medium. It is important that the temperature inside the cell aggregate alternatively becomes less or greater than the ambient temperature. Such a temperature regime may lead to serious thermo-mechanical damage of the tumor cells not only due to ordinary thermal expansion during the freezing but also because of tensile stresses that arise at the surface of the frozen biological cells or their aggregates. Potential possibility of microwave monitoring of small local regions of thawing is analyzed on the basis of Mie theory calculations.
机译:考虑了当今冷冻手术中典型的瞬态传热问题。建议使用相对简单的模型来考虑生物细胞内部以及细胞之间间隙中不同的冻结温度。在最复杂的互穿介质情况下,当单元之间以及间隙之间存在热接触时,将制定并解决模型的一维问题,并特别注意反复冻结和解冻所产生的影响。已经表明,熔化潜热可能导致肿瘤典型的细胞聚集体温度与细胞外培养基之间的显着差异。重要的是,细胞聚集体内部的温度必须低于或高于环境温度。这样的温度范围不仅可能由于冷冻过程中的常规热膨胀,而且由于在冷冻的生物细胞或其聚集体的表面上产生的拉应力而导致肿瘤细胞的严重的热机械损伤。基于Mie理论计算,分析了微波监测小区域解冻的潜在可能性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号