基于血液的频率特性来区分血栓与气肿  

Discriminate Thrombi from Air Emboli by Idiosyncrasy of Blood Frequency

作　　者：张金钟[1] 刘亚军[2] 白国刚[1] 

机构地区：[1]解放军总医院第二附属医院医务部,北京100091 [2]解放军总医院第二附属医院医学工程科,北京100091

出　　处：《中国医疗设备》2008年第12期11-12,23,共3页China Medical Devices

摘　　要：本文介绍了使用电桥测试仪、Agilent 4285A,测量从10头猪上抽取的正常状态下以及凝固状态下的血液样本,得出其电导率和相位差。同时测量正常细胞的红细胞比容(血液中血细胞占全血容积的百分比)。在低于800kHz的情况下,正常血液和凝固血液的电导率之差保持在4.3mS/cm,在高于800kHz时呈递减趋势。电导率差与红细胞比容无关联(相关系数=0.04)。在1MHz到2MHz的情况下,正常血液和凝固血液的相位差达到最大值。因此,在1MHz到2MHz的情况下的相位差就能分辨出血栓和气肿。Measures the electrical conductivity and phase shift of normal and coagulated blood sampled from 10 pigs using LCR meter and Agilent 4285A. And also measures the hematoerit of normal blood. The conductivity difference between normal and coagulated blood remains at 4.3 mS/cm up to 800 kHz, and then gradually decreases. The conductivity difference is not correlated with the hematocrit （correlation coefficient = 0.04）. The phase difference between normal and coagulated blood reaches the maximum, -13.5 degree, between 1 and 2 MHz. Therefore, it is possible to discriminate thrombi from air emboli using the phase difference at the frequency range of 1 to 2 MHz.

关 键 词：电阻抗 电阻抗测量 频率特性 凝固血液 栓塞检测 

分 类 号：R319[医药卫生—基础医学]