Noninvasive Blood Flow Rate Measurement by Heat Diffusion
The conventional noninvasive techniques in measuring blood flow rate are calorimetry, thermography, plethysmography, ultrasound, and nuclear magnetic resonance. However, these techniques are very complex and hard to use in clinical measurement. This important clinical measurement has not played a major role in the clinical management of patients. A noninvasive method of measuring the blood flow rate in the cutaneous tissue by heat diffusion between the skin and the metal is described in this paper. Heat was used as the indicator; the feature that blood flow was the main medium of heat diffusion in the body was utilized; the temperature of the skin and the temperature change of the metallic heat-conductor were measured; the curve of metal heat-conductor was normalized and integrated; the mean that is related to the blood flow rate was derived from the curve. The results showed strong correlation between the value and the blood flow rate. The device could quickly realize the measurement of blood flow rate in the cutaneous tissue, and the measuring system was simple and practical.
heat diffusion blood flow rate noninvasive
XU Xiaowen CHEN Zhencheng
Institute of Biomedical Engineering, School of Info-physics and Geomatics Engineering, Central South University, Changsha, 410083
国际会议
北京
英文
2007-08-05（万方平台首次上网日期，不代表论文的发表时间）