连续测量组织血流量和组织含水量的热扩散法

Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991 Pub Date : 1991-10-31 DOI:10.1109/IEMBS.1991.684902

G. Delhomme, A. Dittmar, R. Ferrera, P. Marcsek, J. Jossinet

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引用次数: 1

摘要

在导管尖端(外径0.8 mm)和周围组织的初始平衡温度之上，采用固定温升的瞬态方法。热功率在热敏电阻的前2 s主要依赖于组织导热传递，之后主要依赖于热传导和热对流传递。热传导取决于组织含水量，热对流取决于组织血流。在猪心脏低温储存和人工复苏期间进行的实验验证了该方法。

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Thermal Diffusion Method For Continuous Measurements Of Tissue Blood Flow And Tissue Water Content

A transient method is used with fixed temperature increment above the initial equilibrium temperature of the thermistor encapsulated at the tip of a catheter (0.8 mm O.D.) and the surrounding tissue. The thermal power dissipated into the thermistor during the first 2 s mainly depends on the tissue heat conduction transfer afterwards on both the heat conduction and heat convection transfers. Heat conduction depends on tissue water content and heat convection depends on tissue blood flow. Experiments performed in pig hearts during hypothermic storages and artificial resuscitations validate this method.

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来源期刊

Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991

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