摘要
为了更全面的了解血液的低频电频谱特性,利用我们所研制的比较法宽频组织、血液电特性检测系统对血液及不同组成、状态等在1Hz～2 0 MHz范围内的幅频特性和相频特性进行了测量。实验结果的进一步分析表明,通过血液电频谱特性的认识,可以帮助我们从一个全新的视角去了解血液、分析血液乃至更微观层次的一些重要性质;同时,指出了现在生物组织、血液等效电模型存在的一些问题及改进的思路。(1)从1Hz～5 KHz范围血液电阻抗下降了99%。(2 )简单的血液电阻、电容等效电路只能是串联等效而非被常用的并联等效。(3)实验表明,血液的等效电路还应进一步分析,因为简单的R、C等效仍有很大误差。(4)为研究探讨血细胞内液电阻、细胞膜电容和细胞外液电阻的三元件模型,在测量时三频率必须非常接近。
In order to understand the electricity frequency specialties of blood, we have developed a wide frequency electricity characteristic testing system and used it to test the amplitude frequency property and phase frequency property of the blood in different states and constituents at 1 Hz to 20 MHz. Further analysis on the resuls of tests helped us know some important properties of blood at even more microcosmic levels from a new angle. Meanwhile,some problems and considerations on the improvement of the electricity model of biotic tissue and blood were pointed out. （1） From 1 Hz to 5 KHz, the impedance of blood descended 99%. （2） Simple equivalent circuit of resistance and capacitance must be used in series equivalent but not in usual parallel connection equivalent. （3） Experiment indicated, equivalent circuits of blood need more analysis, because simple equivalent circuit of resistance and capacitance is liable to gross error. （4） When the three element model is used for measuring the resistance of inside liquid, capacitance of cell membrane and the resistance of outside liquid of blood, the three testing frequencies must be very similar.
出处
《生物医学工程学杂志》
EI
CAS
CSCD
北大核心
2005年第2期275-279,共5页
Journal of Biomedical Engineering
基金
中国博士后科学基金资助项目资助 (中博基 (2 0 0 1) 5号 )
